Human Hair Wigs Buying Guide

Human Hair Wigs Buying Guide

2021-05-12
Aminica Wigs
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human hair wigs is the best seller in China Aminica humain hair international Co,. Ltd. in the present. There are many reasons to explain its popularity. The first one is that it reflects the fashion and art concept. After years of creative and industrious work, our designers have successfully made the product to be of novel style and fashionable appearance. Secondly, processed by the advanced technology and made of the first-rate materials, it has outstanding properties including durability and stability. Lastly, it enjoys a wide application.Aminica Wigs is the renowned brand in both domestic and foreign markets. Through in-deep market exploration on products, we collect a variety of information about market demand. According to the data, we develop different products fitting to specific demand. In this way, we are about to tap into the global market targeting specific customer group.Many customers show great concern about the delivery time. To meet customer's marketing needs, we promise the on-time delivery of human hair wigs and other products at Aminica humain hair.
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Homemade Recipes for Hair?
Homemade Recipes for Hair?
for dry/damaged hair: avocado banana clear honey mayonaise olive oil eggs OILY HAIR: apple cider vinegar strawberries baking soda lemon juice COMBINATION HAIR: yogurt ***you can use a combination of all or any of the above ingredients***1. homemade birthday presents?possibly make her a goodie bag? i did this as quickly as and my bff enjoyed it. I went to mattress tub and previous and have been given creams, towels, and different coastline/physique necessities. Then i offered a coastline bag (together with her intial on it) (inexpensive) and placed all of it in. I additionally lined a cutting-edge card to her popular shop. So my advice is to p.c.. a topic, ex. coastline/physique/her popular issues and then make her a custom goodie bag. possibly make her a school. pass to a crafts shop and purchase a poster board and paste photos, issues from magazines, and computing gadget prints onto the board. Make it resemble her character. I did that when and my chum grew to become into surprised how stable it grew to become out. she placed it on her wall. hire strippers? Lol merely kidding. playstation you may by no capacity pass incorrect with tub stuff and table sure or perhaps money/present card is stable for a cutting-edge. stable success!2. Is homemade peanut better unhealthy?Yes absolutely. This is the most clean peanut butter u can have. Just have some peanuts, olive oil or coconut oil or desi ghee, get the raw peanuts, roast them, peal them and grind them then add some ghee or olive oil or coconut oil to make a creamy paste u can add some water too if the paste is still thick. The. Store it in a jar!Is homemade peanut better unhealthy?.3. Recipe for homemade pancakes?These are really good - I have included some variations for you as well. Buttermilk Pancakes Ingredients 1-3/4 cups all-purpose flour 2 tablespoons granulated sugar 2 teaspoons baking powder 1/2 teaspoon baking soda 1/4 teaspoon salt 1 egg, slightly beaten 1-1/2 cups buttermilk or sour milk 3 tablespoons cooking oil Desired fruit options (optional)* Desired syrup (optional) Directions In a large bowl stir together flour, sugar, baking powder, baking soda, and salt. In another bowl use a fork to combine egg, buttermilk, and oil. Add egg mixture all at once to flour mixture. Stir just until moistened (batter should be slightly lumpy). If desired, stir in desired fruit. For standard-size pancakes, pour about 1/4 cup batter onto a hot, lightly greased griddle or heavy skillet, spreading batter if necessary. For dollar-size pancakes, use about 1 tablespoon batter. Cook over medium heat for 1 to 2 minutes on each side or until pancakes are golden brown, turning to second sides when pancakes have bubbly surfaces and edges are slightly dry. Serve warm. If desired, top with syrup. Makes 12 standard-size pancakes or 40 dollar-size pancakes. *Fruit Options: Stir one of the following fruits into the pancake batter: 1/2 cup chopped fresh apple, apricot, peach, nectarine, or pear; 1/2 cup fresh or frozen blueberries; or 1/4 cup chopped dried apple, pear, apricot, raisins, currants, dates, cranberries, blueberries, cherries, or mixed fruit. Pancakes: Prepare Buttermilk Pancakes as above, except substitute milk for buttermilk, increase baking powder to 1 tablespoon, and omit the baking soda. Whole Wheat Pancakes: Prepare Buttermilk Pancakes as above, except substitute whole wheat flour for the all-purpose flour and packed brown sugar for the granulated sugar. Buckwheat Pancakes: Prepare Buttermilk Pancakes as above, except use 3/4 cup all-purpose flour and add 1 cup buckwheat flour. Cornmeal Pancakes: Prepare Buttermilk Pancakes as above, except use 1-1/4 cups all-purpose flour and add 1/2 cup cornmeal. Bran Pancakes: Prepare Buttermilk Pancakes as above, except use 1-1/2 cups all-purpose flour and add 1/4 cup oat bran, wheat bran, or toasted wheat germ. SOUR MILK: Place one (1) tablespoon of lemon juice in a 1-cup measuring cup and fill to one cup line with milk. Let sit 5 minutes before using. WA4. Easy and simple homemade mouthwash?dont be lazy, go buy some5. How can I add homemade yeast nutrients in my homemade wine?This Site Might Help You. RE: How can I add homemade yeast nutrients in my homemade wine? I started a gallon of water/sugar/yeast to see if it will produce some alcohol (read about it on a blog). I've done with with great results with grape juice. I realized that the yeast probably isn't going to get enough nutrients. I won't get my nutrients for another few weeks. Is...
Development Status and Application Prospect of Internet of Vehicles
Development Status and Application Prospect of Internet of Vehicles
Internet of vehicles is a typical application of Internet of things technology in the field of transportation. With the improvement of market maturity, its connotation has been further expanded. This paper discusses the Internet of vehicles in a narrow sense, that is, telematics service (on-board information service system), which refers to a service system that integrates users and various service resources through the vehicle terminal.This paper attempts to find the correct development path of the Internet of vehicles in the future by combing and discriminating several existing development modes of the Internet of vehicles.introductionIn 2015, Premier Li Keqiang put forward the "Internet plus" action plan to promote the integration of mobile Internet, cloud computing, big data and Internet of things with modern manufacturing industry, promote healthy development of e-commerce, industrial Internet and Internet finance, and guide Internet companies to expand their international markets. The subversion and transformation of traditional industries by the Internet has become a trend. The Internet is not only the re excavation of the potential of the industry, but also the re transformation and subversion of traditional industries with internet thinking. From Tesla's redefinition of people's understanding of cars to apple, Google, Microsoft, Ali, Baidu, LETV and other Internet giants' full-scale battle for the Internet of cars, the era of the Internet of cars has come.In a narrow sense, the Internet of vehicles, namely telematics service (on-board information service system), refers to a service system that integrates users and various service resources through the vehicle terminal. The generalized vehicle networking also includes intelligent transportation system.1. Development status and application prospect of Internet of vehicles1.1 development status of Internet of vehiclesThe connotation of Internet of vehicles has developed from the earliest embryonic stage focusing on navigation to the primary stage focusing on TSP services, and then to the intermediate stage focusing on "scenario" services. "Scenario based" service is a comprehensive service system that integrates multi role and multi scenario applications for four major users, including drivers, passengers, vehicle manufacturers and vehicle managers, as shown in Table 1.Table 1 Â Evolution of Internet of vehicles application scenarios1.2 application prospect of Internet of vehiclesFrom the end of the Internet of vehicles, it is the realization of unmanned driving and the core part of intelligent transportation. Internet of vehicles is the core information communication platform of its (Intelligent Transportation System) in the future, playing more and more roles [1].(1) Ensure road driving safetyThe Internet of vehicles can effectively reduce the incidence of traffic accidents and make travel safer through emergency braking, accident scene early warning, intersection early warning, overspeed warning, retrograde warning, prohibition of fatigue driving and other related technologies.(2) Prevent traffic jamsThrough intelligent traffic management, the Internet of vehicles can realize road condition monitoring, early warning and non-stop billing, effectively alleviate the pressure of traffic congestion, reduce about 60% of traffic congestion, provide road utilization rate, increase the traffic capacity of existing roads by 2 3 times and shorten driving time. At the same time, it can also reduce energy consumption and reduce vehicle exhaust emissions by 25% 30% [2].(3) Promote the upgrading of automobile industryImplement the strategy of Internet of vehicles, bring the automobile manufacturing industry into the innovation environment of China's new communication technology, improve the ability of new automobile technology, and drive the development and upgrading of the automobile industry with digital technology.(4) Realize intelligent transportationAll major parts of traffic management can be realized through the Internet of vehicles, such as intelligent control of traffic lights, traffic accident handling, intelligent parking lot management, electronic non-stop charging, bus intelligent dispatching, etc. the Internet of vehicles is used as the communication management platform to realize intelligent transportation.2. Analysis on industrial chain of Internet of vehiclesThe industrial structure of China's Internet of vehicles is complex, as shown in Figure 1.Figure 1 Â Diagram of Internet of vehicles industry chain(1) Vehicle factory (OEM)The vehicle factory is the carrier for the realization of the Internet of vehicles service. It is in the central position of the traditional industrial chain. It has a large voice and appeal. It can effectively integrate many resources and has great advantages in the development of the Internet of vehicles.However, due to the competitive relationship between the vehicle manufacturers, the vehicle networking services provided by the vehicle manufacturers are only limited to their own brands, which makes the vehicle networking services of various brands independent and incompatible. Moreover, the vehicle networking services provided by the vehicle manufacturers are generally expensive and can only be bundled and installed on their own brand vehicles. The scope of customers is limited, and the afterloading market promotion is unfavorable.(2) Content provider (CP)Content providers mainly provide music content, video content, news content, weather content, etc., which are reflected in the forms of direct content access, on-board app, etc., and have a weak voice in the whole Internet of vehicles industry.(3) Service provider (SP)Service providers mainly provide security services, rescue services, call center services, insurance services, etc. most service providers cooperate with other companies (such as vehicle manufacturers, communication companies, etc.) to transform into TSP.(4) On board information service provider (TSP)Vehicle information service providers directly face users in the industrial chain and provide users with navigation, road information, remote diagnosis and control, entertainment information, dealer activities and other services. TSP is at the core of the whole industrial chain. It integrates and supervises the service content forward and provides services in two ways backward:One is to act as a "white card" service provider and determine the brand by the vehicle manufacturer;The other is to provide telematics services to users by TSP's own brand.In addition to integrating resources and providing services, TSP also undertakes the task of collecting fees and distributing profits [3].(5) Equipment provider (EP)The equipment supplier shall provide on-board terminal equipment including hardware, system, software and application integration, provide supporting equipment for the whole vehicle factory as Tier 1 in the front loading market, integrate and install relevant system software, positioning software, sensing chip, GPS module and other electronic component equipment according to the design scheme provided by the whole vehicle factory, and produce special on-board terminal.In the aftermarket, simply buy equipment or cooperate with service providers to provide TSP services. Generally speaking, the voice is not high.(6) Communication provider (TP)Communication providers provide wireless network communication services, including network services and telephone services, which are the infrastructure for the realization of vehicle networking. In China, they are mainly China Mobile, China Unicom and China Telecom.(7) GovernmentThe government is not only the supervisor and guide in the Internet of vehicles industry chain, but also the user of Internet of vehicles services, which plays a leading and promoting role in this industry.3. Analysis on the development mode of Internet of vehiclesThrough the analysis of the Internet of vehicles industrial chain, it is known that TSP is in the core position in the whole industrial chain. It integrates and supervises the service content forward and provides services to users backward. It is classified according to the status of market participants in providing TSP services. There are the following development modes in the market.3.1 the whole vehicle factory is in the leading positionThe whole vehicle factory independently provides TSP services or controls other TSP service providers to provide services. The whole vehicle factory has many profitable items in the Internet of vehicles industrial chain:In addition to the fees paid by users for purchasing terminal equipment and ordering package services, vehicle manufacturers can obtain a certain profit share through cooperation with third parties;Advertising revenue of new media platform according to the preferences and needs of catering, entertainment and leisure places involved in car owners' travel;Based on the interest point sharing and interest point ranking of car owners' interactive participation, the income obtained from the life service hot spot platform and the introduction of hot CP / SP resources.Whether self operated TSP or other TSP suppliers provide services, the main engine plant has the highest revenue share due to its dominant position and large amount of investment in advance. However, looking at the whole vehicle networking market, there is no TSP service dominated by the whole vehicle plant to make a profit. According to the current situation of China's Internet of vehicles market, the development mode led by vehicle manufacturers can be divided into three types: self operated, joint venture and pure outsourcing.(1) Self operatedThe vehicle factory establishes its own brand of vehicle networking service, and its companies or departments provide services. Represented by Dongfeng Nissan, its Dongfeng Nissan data marketing company provides carwings Zhixing TSP services. Because it is self operated, the vehicle factory has complete control, high internal communication efficiency, timely solve problems and respond to user feedback in a timely manner.At the same time, the vehicle factory also faces some difficulties:The whole vehicle factory lacks experience in networking service construction and follow-up operation, and the control cost is high;Secondly, the initial investment is huge, such as the establishment of T platform, call center and the establishment of special companies or departments, with high cost;The companies or departments under the vehicle factory conduct management and operation, with low requirements for profitability, low pressure and lack of long-term development driving force.(2) Joint ventureThe vehicle factory and TSP professional service provider establish a joint venture to jointly operate the vehicle networking services of brand vehicles under the vehicle factory. Represented by anjixing, OnStar and SAIC hold 40% shares respectively, and SAIC GM holds 20% shares. Shanghai anjixing company was established to provide security oriented Internet of vehicles services for Cadillac and Chevrolet under GM.In the joint venture mode, vehicle manufacturers and professional TSP suppliers are under public management and operation, and can share resources, experience and talents, with obvious advantages. However, as a subsidiary of the holding company of the vehicle factory, it has a large operational independence and mainly focuses on profits, which may affect the overall vehicle networking strategy of the vehicle factory. Moreover, the cooperation between two or more parties may produce interest disputes and large internal friction.(3) Pure outsourcingThe vehicle factory has signed an outsourcing agreement with the TSP professional service provider. The outsourcing TSP service provider provides flag and off vehicle networking services for the vehicle factory, represented by the outsourcing of Toyota G-book to 95190. The advantage of this mode is that the vehicle factory can not only manage and control TSP, dominate the business direction, but also ensure the efficient operation of TSP services. After all, the third-party TSP has a professional team, operation management experience, a full set of operation qualification and sound management process.However, there are also problems. The third-party TSP not only serves a vehicle factory, but also has the risk of data leakage for the vehicle factory. And once the vehicle factory wants to operate the vehicle networking business, the replacement cost is high.3.2 communication operators are in a dominant positionThe dominant business model of communication operators mainly appears in the afterloading market. Communication operators develop a complete set of systems related to Internet of vehicles Services by themselves, including building TSP service operation platform, planning service functions, procurement and contracting of content, formulating sales strategy, pricing and charging, and all activities related to operation. All revenues are distributed by the communication operators according to the cost and the profit contribution rate of each participant. The communication operators have the largest investment and the highest share of revenue.
Red Hair Or Brown Ombre Hair?
Red Hair Or Brown Ombre Hair?
i think the red is very preetyy , i have that colour, at the moment, it was purple but faded, but imm dying it back purple on saturday. its cute and stands out, x1. Good hair product for frizzy hair?i use a serum by paul micthell and it takes out all my frizz...i love it...i hope i helped in some way =)2. Old hair or New hair?i love your new hair. i love the bangs totally chic!3. Hair product for curly hair that is frizzy?I use Frizz Ease Dream Curls but anything from Frizz Ease has been good for me4. Hair Relaxers/ Black Hair Care?one week before you relax you should do a protein treatment. aphogee protein treatment for damaged hair. you should put a lye relaxer in your hair because it is less drying. if you can, go to a professional.5. Hair do's for medium hair?simply part your hair on the side and curl the ends simple but cute6. bad hair hair hair day everyday?hair straighteners, hair rap thingy for when you go to sleep, permentent product like hair straightener stuff to help the bits not stick out, clips, softning product like hair moose???7. The purple hair or the red hair, the red hair or the purple hair?The red8. Facial Hair or No Facial Hair?YOU SHOULD LOOK NEAT & TIDY WITH NO FACIAL HAIR9. hair hair hair hair hair hair hair hair hair hair hair hair hair hair hair hair hair hair hair hair hair hair?1.yes 2.no. it will be thinner looking, but I think that you will not be able to make your hair thicker, but you should use a volumizing product that you just massage into your hair bye herbal essences which also reduces frizz.10. helpp...hair hair hair!!!?If your hair is curly then you should not touch it once you get out of the shower. You should run your fingers through it with some frizz calming serum and let it drip dry. DO NOT BRUSH OR TOWEL DRY. I know a girl w/ hair just as you described and that's how she said she did her hair. She was BEAUTIFUL.11. POLL: long hair or short hair?Long hair on guys is cool, but I like a little style with it. Long, boring hair on girls is boring and looks the same on everyone. I vote short.12. Straighten hair, than hair spray?use a heat protection spray first, then wait on it to dry.. i dance during this part, cause i listen to music && do my hair. then lightly.. i repeat LIGHTLY spray your hair before you straighten. then straighten.. once it's all prettyful and how you like it.. hair spray all over. [: i use rave hairspray by suave, it's got good hold.. it's cheap... and it smells nice [:13. I need help ASAP. HAIR HAIR HAIR?i dig girls with afros14. homecoming hair, makeup, straightening hair!?Hello your fortunate we certainly not do stuff like that during my institution! Ok so for straightening your hair: -First wash it utilizing shampoo and conditioner. -Comb it by way of (combs are bigger to your hair while it is rainy) -While it is nonetheless damp it is a well time to use a few hair mouse for your hair (it particularly is helping your hair to stick in position) -Blow dry it immediately. -Straighten it phase by way of phase, pin so much of it up, straighten the backside phase and paintings your solution to the highest. -Use a well hair spray (no longer an excessive amount of or it's going to make your hair sticky) As its raining you must take a coat and umbrella. Make up: -Pick your excellent function to your face. -If it is your eyes curl your lashes (when you've got curlers) use a few mascara and eyeliner/eyeshadow for those who wish (do not pass excessive even though) Keep your lips useful only a sprint of transparent lip-gloss must be satisfactory :) -If you prefer your lips put on a exceptional colored lip gloss or lipstick (not anything to daring as its no longer a proper dance) and maintain your eyes useful :) Your outfit sounds particularly adorable and might be you must upload a few Accessories in case your no longer already? Earrings, braclets? Hope this is helping and feature a laugh at your dance x].
How to Wash Anthropologie Clothing?
How to Wash Anthropologie Clothing?
I would definitely not wash the clothes in the machine, especially considering how much you paid for it. I would not risk ruining such expensive, delicate fabric. However, what I would recommend is that you first check the label on your apparel to see its maintenance instructions (usually these labels are located on the inside of the skirt and tank top, on the seams). There, you will be informed of how to clean the clothes. If there are no labels on the clothes, perhaps you can track down the items on their website and then see its cleaning instructions. After researching Anthropologie clothing, I found that most of the clothes either require you to hand wash or dry clean them. If you are still clueless over what to do about them, you could either dry clean them (expensive, but safe) or you can risk it and hand wash the items (it's not to say that you will exactly ruin the clothes, either). These are my recommendations, but keep in mind it is only advice, so do not necessarily take my word for it. Good luck!1. How to wash after intercourse?Assuming you are a man, you could just use toilet paper to get it out of your ***2. What is a good face wash?clean and clear astrigent. its a blue botlle. you use make up pads to apply it once a day. or just cover with a good concealer3. why is there a pause after the atrial contraction and before the ventricular contraction?To stop back wash !4. What is the best acne wash?im using neutrogena right now and it works very well!5. What car wash tasks should be done after an automatic car wash?Drying is the most important part. Try to dry out all the areas where water can collect and sit. Same thing if the car is out in the rain. That sitting water leads to rust6. How To Wash A Kimono?If your question is about Traditional Japanese kimono for ladies... Do not wash it or soak it in water (not even with chemical dry cleaning spray)! If there is not any label / care instruction giving you a hint, you better bring the item to the professional cleaner and ask for advice. Some chemical dry cleaning sprays may damage your delicate kimono, especially, the obi (The obi is the most expensive part!). When you drop some food or sauce on your kimono, it is better to clean it immediately. Try to get a warm towel or dip the tissue with some warm water, press it on the dirt and pick it out carefully (do not rub it hard), when the colour of the dirt turned lighter, hold that area with your hands and dry it naturally in room temp. (do not dry it with hot iron or hair dryer) For the "old" dirts, dip a think towel in the mixture of water 8 : white vinegar 1: alcohol 1 and pick the dirt out with care. Do not hang your kimono under the sun, clean your kimono in a cloudy day with a bit of humidity because the chemical (alcohol) would not evapourate too quick and you can catch the time to do a better job. Good Luck!7. acne facial wash ...................................... ?just eat healthy and drink water. try this the best you can for a month and seee the results. it works but its definitely hard to eat right8. how to wash a ferrets face?Get a washcloth and wipe the face gently. =)9. Itchy tattoo with little irritation bumps. What is wrong? What do I do?sounds like a rash did you put any lotion or anything on it the tattoo area is more sensitive then the rest of the skin because it has been altered wash it treat it with neosporin change lotion body wash and hand soap to a different brand and see if that helps10. Does any onee have any info on GE top loader HE washing machines?I have a GE Washer I hate it. I rented it brand new out of the box from Easy Rental. It never spins all the water from the load. I have to put it on small load to wring it out almost damp/dry. It cost me $59.00 a month for 18 months. It is paid for now but I still hate it. I just got it that way because I had no other way at the time and my old faithful died after 12 years of use. The GE It always cranks and clunks like it does not have enough grease or oil on some ball bearings. when it changes from wash to dry. I only kept it because I really need it with my size family. I used to have a Hot Point washer it was the best thing. I am not sure about prices though. What ever you get I hope you can test it first.I see some stores have them set up so you can see what the performance is like.
Information for Best Wigs Like Human Hair Wigs, Synthetic Wigs and Customize Cutting
Information for Best Wigs Like Human Hair Wigs, Synthetic Wigs and Customize Cutting
Please be sure to read all of the following information thoroughly, as well as follow all recommended instructions to ensure that you are completely knowledgeable before making a purchase. This will ensure that you avoid any issues that would cause your end result, and overall experience to be less than satisfactory.In the event that you require further information, we encourage you to contact us with any inquiries prior to beginning your order process.Powder Room D strives to provide clients with an exceptional shopping experience and we want all of our clients to be well informed when making an investment in one of our products.What Type Of Wig Would Be Best For You?Powder Room D offers a wide variety of different types of wigs and it is crucial that you determine which wig would be best for you before making a purchase.Powder Room D offers both custom and stock wigs made out of heat safe synthetic hair as well as wigs and hair extensions made out of Human Hair. You would first want to determine which type of hair would work best for your budget and lifestyle and how much longevity you are looking to get out of your wig or hair extensions.Heat safe synthetic hair can be styled with hot tools at a temperature of up to 180 degrees Celsius. They can be straightened with a blow dryer or flat iron and they can be curled with a curling wand, curler or roller set. Heat safe synthetic hair is the better option if you are looking for something affordable and short term. This is the perfect option for a costume party or photo shoot. All of our heat safe synthetic wigs are lace front and can be parted along the hairline from ear to ear. It is possible to make a heat safe synthetic wig look just as good as a human hair wig however the overall quality and longevity will not be the same. Some of the most common complaints about heat safe synthetic hair would be tangling, excessive shine or luster to the hair or simply the fact that styling is not as easy as dealing with human hair. Fortunately, there are many tips and tricks to making your synthetic wig appear more natural. You can use a dry shampoo or even baby powder on the wig to make the synthetic shine completely subtle and undetectable. You can also use a tweezers to gently pluck away hairs from the parting for a more realistic scalp illusion in the wig. (Plucking with great precaution and only plucking two strands of hair at a time to avoid ripping the lace). Many people will then apply concealer or foundation to the parting to give off the illusion of an actual scalp. You want to make sure to gently detangle your wig before and after each use starting at the tips of the hair and gradually working your way up. You want to also make sure to always store your wig in a secure space or keep your wig on a display head or in it's original wig box to avoid any tangling or damage.As for our human hair wigs and hair extensions, we use luxury grade imported raw virgin human hair that has not been chemically processed and is of premium quality. Our human hair wigs and hair extensions can be custom colored, lightened, chemically processed and heat styled. Human hair is the better option if you are looking for something for everyday use and want as much versatility as possible. This will be the best option for someone In need of a long-term wig or hair extensions and wants the freedom of styling their hair with out having to monitor heat. Human hair wigs and hair extensions need to be cared for the same way you would care for your own hair. By using heat protectant products, deep conditioning and making sure to detangle frequently to avoid any unnecessary tangles.As far as the different types of wigs that we offer and what will work best for your situation you will want to read the different wig descriptions below.A U-part wig is simply a modified half wig composed and created with wefted hair extensions where hair is sewn to a wig cap in the same fashion of a sew in weave or hair extensions, which allow some of your real hair to be blended in. The wig has a "U" shaped cut out at the top of the head so a small amount of your natural hair can overlap and blend in with the wig. U-part wigs can easily be clipped on and off like one big clip in hair extension or they can even be attached to the head and sewed down like a weave. The u-part wigs are all made the same way, however you do have the option of making the U-part opening as big or as small as you would like depending on how much of your real hair you would like exposed. You can also shift your U-part wig around according to where you would like your parting to be.A Full Wig is made out of wefted hair extensions that are sewn to a cap in the same fashion of a traditional sew in weave and U-part Wig with the exception of the "U" shape cut out being left open at the top. Full Wigs are closed and covered at the top with the use of a closure or lace frontal. A closure is an oblong shaped durable transparent or slightly flesh tinted lace or silk base with hair attached intended for use when closing any full head weave or use with closing a wig unit. Closures can be placed directly on top or on the side of your install depending on your custom preference to provide the look of a natural looking parting in the hair which is often optional for placement as a middle or side part. Full Wigs with closures allow easy installs and can be easily removed and reinstalled daily without having to sew them down.Due to the nature of our products, all sales are final. Returns & Exchanges are not allowed unless your item arrived damaged or there was an error on our behalf. Any issues or concerns about your order and merchandise must be addressed with in 30 business days.How can I keep rabbits, racoons, squirrels, etc out of my vegetable/fruit garden humanely and without chems?moth balls, baby powder, cayenne pepper, ground cloves or clove oil, human hair, dog or cat hair, fox urine (yes, you can buy this), put a thin line of laundry soap around the garden...they do not like the smell chicken wire fence might help...but they can always climb over that plastic owl or plastic snake statues hang aluminum foil pie plates on a string...clothesline fashion, so they will make some and scare them away. Will not work forever though...they will get used to the noise. Good luck...eventually they will try to get in again and you will have to come up with new methods to stay ahead of the game. ;-)
Review Avanti WD360 Cold/Room Temperature Floor Water Dispenser
Review Avanti WD360 Cold/Room Temperature Floor Water Dispenser
Review Avanti WD360 Cold/Room Temperature Floor Water DispenserBuy Link: CLICK HEREAvanti WD360 Cold/Room Temperature Floor Water Dispenser Product Description:Avanti WD360 Cold/Room Temperature Floor Water Dispenser. Avanti WD360 Cold/Room Temperature Floor Water Dispenser Type: Free Standing Features: Lightweight and energy efficient silent thermoelectric model with non-compressor system Large stainless steel reservoir for water purity Dual taps for instant cold and room temperature water Durable plastic body with detachable leveling leg Removable drip tray for easy clean up LED indicator lights for cooling status Uses 2, 3 or 5 standard gallon bottles (not included) Water Temperature Settings: Cold Indicator Light: Yes Removable Drip Tray: Yes Color: White Height: 33.5" Width: 11.75". Price: 115.23 USD. Sale Price: 115.23 USD.The Avanti WD360 Cold/Room Temperature Floor Water Dispenser is certainly that and will be a great buy. For this price, the Avanti WD360 Cold/Room Temperature Floor Water Dispenser is highly recommended and is a popular choice with lots of people.Buy Avanti WD360 Cold/Room Temperature Floor Water Dispenser·RELATED QUESTIONDoes the Redmi Note 4 support screen mirroring?Xiaomi's popularRedmi Note 4phone runs on Mediatek's premium Helio X20 processor and also supports both Google Cast and Miracast for its wireless display technology. To use Miracast with an Android-based TV like theSony Bravia 4K Ultra HD Smart LED TV with Android, first go to yourRedmi Note 4phone'sSettings -> More -> Wireless display.Switch on the Wireless display option, and you will see all available devices to which you can connect and display wirelessly. The Sony Bravia TV will be represented by its model number, which when selected, theRedmi Note 4will start the wireless display connection process.Once the phone and TV are connected, the Sony Bravia 4K TV will display the phone's screen.Miracast lets you conveniently select YouTube videos on yourRedmi Note 4to be enjoyed on theSony Bravia 4K Ultra HD Smart LED TV with Androidwhile also playing on the phone. Additionally you can also share photos and other files easily between these devices
Show Off Your Style with Confidence with Indian Hair Extensions  Remypatra Hair Extension
Show Off Your Style with Confidence with Indian Hair Extensions Remypatra Hair Extension
When it comes to change the hairstyle and enhance the look, you will find a lot of options. But not all those options come with an affordable price tag. Those who have money, for them this can be an easy task. But the time has changed, and now a normal woman can easily change her hairstyle with the help of hair extensions.There are different types of hair extensions available in the market such as weaves, wigs, fusion extensions and more. But you need to choose the best one, i.e., the Indian hair extensions. There are some reputed Indian hair suppliers in India, who can offer you this at a much reasonable price. Benefits of using Indian hair as hair extensions1. It will turn your hair more beautiful and appealingOne of the most important benefits you can attain when choosing Indian hair extensions is, they will dramatically make the hair more appealing. Well, it is quite a stressful task to grow healthy and beautiful hair. Besides, this can be very expensive as you will using different products. But by choosing the hair extensions, you can enjoy a good-looking appearance. But always buy such extensions from the best Indian hair suppliers in India. 2. You will be able to show off different hairstylesAnother benefit of Indian hair extension is you can enjoy different hairstyles. Most of the women choose the hair extensions to attain longer hair easily. You can easily access a number of hairstyles, matching with your preference and style. With short hair, you can only enjoy limited styles. Apart from this benefit, you can now add color and vibrancy to the hair.3. You will get various hair extension optionsWith professional Indian hair suppliers in India, you can easily choose from different types of extensions. For example, if you want long hair for a long time, you can choose the keratin bond. Such hair extension last for around six to eight months. There are also Indian Virgin Remy hair extensions which last for up to 10 months. If you are going to attain a meeting or some kind of event, you can choose a clip in hair extensions.Apart from enhancing the look and your confidence level, the hair extensions help you to get rid of different hair issues like split ends. This condition arises due to dying hair. The hair extensions concealed the split ends, improving the hair appearance. Originally published at sites. google. com.Thinking of cutting long hair...opinions from long-haired ladies.....?My sister is the PERFECT example for you, she had long hair, and then she cut it at a long A-line, she liked it, so she did a short A-line, and then just a week ago she did a really sassy short cut and she really LOVES the feel, so I think you should try going a little shorter each hair cut, to get used to the idea, and see what you like :) Hope I helped!Now that i'm an "adult" at 22, do I have to start dressing like a geek?regrettably for us "real nerds and geeks" we are insulted with the help of this, new age crap the place donning overly large glasses and a shirt that announces "nerd" makes you a nerd. No, for my section, being a nerd, i am insulted. Nerds are the individuals who are my buddies, all of us take a seat in a room and play D&D all day, yet, we are no longer the stereotypical nerds, granted, the full, "pocket protector and talking throughout the nasals component " is long gone, does not propose we are. I gown in all black, I even have long hair, I paint my nails and that i am in basic terms a splash a stoner, does not propose i am a goth or a stoner, i can outsmart maximum folk at my college, I in basic terms ensue to bypass with the help of despite i desire. to respond to your question: In a feeling, it continues to be no longer cool. And definite, the certainly nerds have it no longer uncomplicated nevertheless.Looking professional with long hair?it somewhat is an somewhat sturdy question and meals for thought. i am 40 and that i've got worked in what I deliberate to be a reasonably conservative workplace in l. a.. although, i am interior the song marketplace or perhaps although my workplace is a little greater conservative than it is going to be, given the marketplace, I placed on it longer because of the fact it is truly curly and it merely works greater effective for me to have it long. i think of the significant components are here: If long, it needs to be nicely groomed-as in an somewhat sturdy haircut and canopy the grey. in case you have a sturdy style approximately you then you definately in addition to might can pull off long hair yet whilst it is gray and you do no longer elect to colour, that starts to look awkward. the significant to long hair is the type. no longer something is worse than women those with 50% or greater gray, long and ungroomed hair. all of us see those and it is gross to me. It appears like a hippie attempting to in good shape into city existence. i think of it is all correct to the guy's common character. If the clothing, makeup and common style all artwork at the same time, longer is high quality. If any of those components are not some thing you could include, you are lots greater effective off having it shorter even though it would not might desire to look as though a guy. i think of it is merely hardship-loose sturdy grooming to have a advantageous, nicely groomed cut back in an workplace environment. visual attraction concerns in spite of what any human beings elect to have faith. It concerns. in case you walked into an investment employer and needed to take a position $3 hundred,000 and the female economic planner who became 40-one regarded scraggly and not nicely saved, would not you experience slightly fearful approximately your money? i comprehend i might. We decide first by skill of visual attraction and that starts whilst we are babies. i think of in reaction to what you defined that your hair is merely too long. i think of decrease than the shoulders is considered long and that's the place yours might desire to fall. whilst it hits the bra strap, this is whilst it is your cue to cut back. :)
2020 Is a Good Year for Zoom
2020 Is a Good Year for Zoom
2020 is a good year for zoom. However, zoom's share price is falling, possibly due to profits, but also because many alternatives have sprung up.2020 is a good year for zoom. In October 2020, the stock represented by the company name has now become synonymous with video conference, which is the market's interpretation of how the zoom boom defined the daily lives of millions of people during the whole covid-19 outbreak.Video call application has almost become a basic part of our life, which is the closest way of interaction between people. Isolation and blockade have brought video chat into the mainstream. Although giants such as Microsoft, Google and Cisco have always been major participants, zoom has soared beyond any other platform, "because its products are easier and more powerful than other platforms, and it appears at the right time - when people really need it." Wayne Kurtzman, who tracks the conference call platform for IDC, a market research company, told CNN in March 2020. It has successfully overcome security and privacy disputes and maintained a stronghold in the field of video calls. However, by the end of 2020, the company's share price was falling - possibly due to profits, but also because there were many substitutes springing up at that time. In addition to the obvious market share that these companies hope to obtain, some of them have also solved the now familiar "zoom fatigue", which is defined by psychology today as "fatigue, worry or burnout caused by excessive use of virtual communication platform".Asynchronous enterprise communicationSome of zoom's challenges are focused on the form of asynchronous communication. Loom combines video communication and instant messaging to create a collaborative work environment. "People pick the time, process and respond, just like old-fashioned letters. It doesn't need to be arranged or coordinated," the company explained on its website. Instead of procrastinating with daily briefings, sending prerecorded updates before synchronous meetings, or summarizing information concisely rather than arranging unnecessary meetings, it makes sense. Similarly, grapevine tried to solve the scheduling problem and brazenly opened its landing page with the phrase "less zoom meetings". It provides a one-way video update asynchronous solution to solve the location and time zone problems or participate in those endless daily standing phones. It is also the supernormal and remote work of the asynchronous video update platform, adding AI driven summary text records that can be clicked, so that team members can jump to the sentences that are important to them in advance, While maintaining the relatively personalized atmosphere provided by the video. And bubbles, a Chrome extension that focuses on screen capture collaboration. "We are taking the screen sharing experience to a new level so that collaboration does not hinder work," wrote CEO and founder Tom Medema. In order to reduce poor communication, when the platform starts a conversation, you can comment on anything you see on the screen. In the background, you can share a private link to start the conversation. Examples include feedback and comments from designers on digital assets, or product experts presenting products and creating audio or text highlights. From all hands to realtalk, there are numerous other initiatives to solve exhausted online meetings. So that in this year's golden Kitty awards, there is a category of "remote work tools", which will commend the products, manufacturers and community members of producthunt every year. "As teams become more and more dispersed, video communication is very important for internal alliance and external business development. Dedicated communication tools help to achieve more effective team standing (standups), continuous team communication (tandem), working meeting (remote headquarters), and spontaneous water cooler chapters (snack). Others are to enable sales phone (modem) , synchronous communication (loom), workplace training (hone) and less interference communication (focus). "– from JJ oslund, the startupEvents in the era of video revolution and moreSimilar to zoom, it also exists in the field of virtual events. Bizzabo has been very popular recently, although it is easy to predict the decline of the event technology founding company when coronavirus froze an industry worth $500 billion. But within two weeks, its Israeli founders successfully transferred their products into the field of virtual activities, and ended 2020 with 100% growth and tens of millions of dollars in revenue. Their latest round of $138 million by Viola growth- Next47 and American insight partners VC lead the investment, indicating that people have more and more trust in its current and future business model. Hopin, another virtual activity platform, has a valuation of US $2.1 billion and raised a total of US $170 million only eight months after its launch. This British company can be said to be the fastest-growing start-up company in Europe. Providing functions such as 1:1 network, virtual booth and comprehensive registration "enables it to better monetize activities, which is why it can establish large enterprises in these narrow vertical fields," JJ oslund explained on the startup of medium. As part of the analysis, he pointed out that these tailored startups actually pose a greater threat to zoom than any direct competitor. Oslund believes that the ability to focus on specific users, from head teachers to project colleagues to friends on game night, has created a unique advantage for vertical companies that is completely suitable for their customers. He believes that "the products designed by startups focusing on the vertical field can better meet the needs of specific user groups. This allows them to create and obtain more value than horizontal products such as zoom." (the following is his complete list of zoom verticality).Picture from: JJ oslund, the verticalization of zoomWhat happens next?
How Is the IPhone 7 Configuration Different From the IPhone 7 Plus Configuration? IPhone 7 Is the Sa
How Is the IPhone 7 Configuration Different From the IPhone 7 Plus Configuration? IPhone 7 Is the Sa
In the early morning of September 8, 2016, apple officially released iphone7 and iphone7 plus. It is reported that the two new iphone7 and iphone7 plus machines are equipped with A10 quad core processor for the first time, adding bright black color matching similar to piano baking paint. The 5.5-inch plus version adds dual photography technology, and the iphone7 also adds large aperture and optical anti shake. So, what is the difference between iPhone 7 and iPhone 7 plus configurations?How is the iPhone 7 configuration different from the iPhone 7 plus configuration--- Configuration comparisonFirst of all, the iPhone 7 / 7 plus is available in five colors: gold, silver, rose gold, black and bright black (the appearance of bright black is only available for models with 128GB and 256gb storage capacity), and they are all in three versions of 32GB, 128GB and 256gb. Equipped with A10 processor, the 3.5mm headphone hole is cancelled, and a stereo speaker is added on the top of the body, which supports optical anti shake, Front pressure sensitive home key and 7 megapixel camera support IP67 waterproof and dustproof.The main difference lies in the body size and screen specification. The iPhone 7 body is 138.3 & times; 67.1&TImes; 7.1mm, 4.7-inch screen (1334 & Themes; 750 screen, 326ppi) and a 12MP lens in the back, priced at 5388 yuan; The iPhone 7 plus body is 158.2 & times; seventy-seven point nine × 7.3mm, with 5.5-inch screen (1080p, 401ppi) and rear dual 12MP lens, the price is 6388 yuan.    Memory: iPhone 7 has been tested to be 2G memory, while  The iPhone 7 plus is 3G memory.    Camera: iPhone 7 has only one rear camera, while  There are two iphone7 plus, of course, both of which are 12 megapixels.    Battery capacity: iPhone 7 battery capacity: 1960mah; The capacity of iPhone7 Plus battery is 2910mAh, and endurance is more awesome.After watching the configuration comparison between iphone7 and iphone7plus, let's take a look at the differences between iphone7 and the previous generation of iPhone:IPhone 7 is the same size as iPhone 6. What's the difference--- It doesn't make much difference!Because both use 4.7-inch screens and adopt the integrated metal fuselage design, the fuselage size is similar, and the overall difference is not particularly obvious. It is mainly the difference in details, which is reflected in the following aspects.Metal materials are differentThe iPhone 6 uses a 6000 series aviation aluminum metal body, while the iPhone 7 uses a higher grade 7000 series aviation aluminum metal body, which means that the 7 body is less prone to bending and has higher hardness.Different back antennaThere are no upper and lower antennas like 6 on the back of iPhone 7. The arc antenna design is adopted, and the back is more simple. The figure below shows the comparison between the back of iPhone 7 and iPhone 6, as shown in the figure below.The front home key is differentIPhone 7 adopts the pressure sensitive home key. Based on the pressure sensitive screen technology, it can sense the pressure of users, but it belongs to the physical key and cannot be pressed. The iPhone 6 uses the home button, which is difficult to distinguish visually. It can only be felt by comparison when it is turned off.Different body colorsThe iPhone 6 has only three body colors of space gray, silver and gold, while the iPhone 7 has obviously richer body colors, including rose gold, gold, silver, black and bright black (the original space gray is cancelled).The iPhone 7 is available in a variety of body colorsOther differencesIPhone 7 cancels the 3.5mm headphone connector, there is no 3.5mm headphone connector at the bottom of the body, while iPhone 6 has headphone connector at the bottom of the body. It is also worth mentioning that the iPhone 7 uses up and down speakers, the top speaker is hidden inside the earpiece, and the iPhone 6 has only one speaker at the bottom of the fuselage.In addition, the invisible difference is that the iPhone 7 adds IP67 waterproof, which can be waterproof and dustproof to a certain extent, while the iPhone 6 does not support dustproof and waterproof. In addition, the iPhone 7 is obviously heavier than the 6 when held in your hand.Comparison summary:The difference between iPhone 7 and iPhone 6 is basically the above. Generally speaking, the difference is not big. IPhone 7 can be said to continue the routine of 6, but it is improved and optimized on the basis of 6. In addition, it has richer colors, and its appearance will be better, but it is not a big change.
Hardware Design of Induction Motor Vector Control Based on Tms320f2806
Hardware Design of Induction Motor Vector Control Based on Tms320f2806
With the development of DSP and power devices, variable frequency speed regulation technology has become the main driving force of scientific and technological development. With the introduction of special motor control devices with real-time signal processor and highly integrated intelligent power module (IPM), induction motor control system powered by frequency converter is widely used. Because the power converter can adjust the motor voltage, current amplitude and frequency in real time, the control system can obtain the best performance.The traditional constant voltage frequency ratio control is one of the most basic common control methods of induction motor, but this method analyzes the running state and characteristics of the motor from the mechanical characteristics of the motor, and the dynamic effect is not ideal. The vector conversion control of induction motor can make the speed regulation performance of induction motor comparable to that of DC motor. Vector transformation technology skillfully realizes the reconstruction and decoupling control of induction motor flux and torque, so that the induction motor speed regulation system tends to high performance. The realization of vector transformation control needs to complete the functions of coordinate transformation, speed control, current detection, flux estimation, PWM signal generation and fault detection protection in real time. It has a large amount of data and high requirements for real-time and accuracy. Compared with traditional single chip microcomputer, DSP has high integration, fast CPU and large capacity memory, and can provide high-speed synchronous serial port and standard asynchronous serial port. In particular, DSP's simplified instruction system, independent program and data space make it have high-speed data operation ability, and can design a vector control speed regulation system with simple structure and superior performance, Therefore, DSP is widely used in motor control system.This paper introduces the basic structure and performance of tms320f2806, and gives the hardware design scheme and software control algorithm of induction motor vector control (rotor field oriented control). The system design makes full use of tms320f2806's rich peripheral components and strong computing ability. The system circuit structure is simple and anti-interference is strong. The experimental results show that the vector control system has good dynamic and static speed regulation performance.2 Introduction to tms320f2806TMS320F280x series is the digital signal processor of Texas Instruments. This series of processor is a fixed-point DSP based on TMS320C2xx core. It is a series of motion control devices with high integration and strong performance. A variety of advanced peripherals are integrated in the device to provide a good platform for motor and other control applications. The internal functional structure of TMS320F280x series is shown in Figure 1.Compared with the previous TMS320F24x series, TMS320F280x series digital signal processor improves the operation accuracy and system processing capacity; Compared with TMs320F281x DSP controller. Two event manager modules EVA and EVB in TMs320F281x DSP are omitted. The function of event manager module is replaced by enhanced peripheral modules epwm, ECAP and eqep, so that designers can effectively solve challenging control problems. The high-speed operation capability of TMS320F280x ensures the real-time control. The large capacity storage space can meet the storage requirements without expanding the off-chip ram, and ensures the high reliability of the control system. It is an upgraded product of motor digital control. The main features of tms320f2806 are as follows:Using high-performance static CMOS technology, the supply voltages of core and I / O are 1.8 V and 3.3 V respectively, which reduces the loss of controller; The execution speed of 100 mi / s shortens the instruction cycle to 10 ns and improves the real-time control of the controller;The chip contains up to 32 KB × 16 flash program memory, 10 KB × 16 bit SRAM, 10 KB × 16 bit OTPROM and 4 KB × 16 bit boot ROM;12 bit a / D converter with a minimum conversion time of 160 ns and 8 or 16 multiplexed input channels. The sampling time is separated from the conversion time, which improves the sampling rate and input impedance. Support automatic sequential sampling without CPU intervention;Up to 16 PWM channels provide convenience for efficient motor control (dual motor control), of which 6 channels are hrpwm (high-resolution pulse width modulation), and the time step accuracy is up to 150 PS, which can control all types of motors;ECAN bus controller can provide good communication for controllers, sensors, excitation sources and other nodes. It is suitable for large noise and harsh environment such as industrial field and automobile.Hardware circuit design of three-phase induction motor systemThe hardware block diagram of low-power asynchronous motor variable frequency speed regulation system controlled by tms320f2806 is shown in Figure 2. The inverter system adopts DSP as the operation control unit, the power circuit conversion unit adopts the fifth generation low-power intelligent module (IPM) ps21564 of Mitsubishi company, the Hall current sensor of LEM company is used to detect the two-phase current of the motor, and the Hall voltage sensor is used to detect the bus voltage of the inverter. The three-phase power frequency power supply is rectified by the rectifier bridge and filtered by the capacitor to obtain the DC voltage, which is sent to the P terminal and N terminal of the DC input terminal of the inverter IPM module. The tms320f2806 controller calculates and processes the detection signal, and the space vector algorithm generates three pairs of svp-wm pulse signals with a mutual difference of 120 °, which act on the ps21564 control input (up, VP, WP, UN, VN and WN) after photoelectric isolation. The output terminals u, V and W of ps21564 output three high-voltage SVPWM waveforms with a mutual difference of 120 ° to drive the asynchronous motor, change its output frequency and realize variable frequency speed regulation of the asynchronous motor. Because the ps21564 has short circuit, undervoltage and overheating detection circuits and protection functions, when a fault occurs, the ps21564 latches six internal ICBT power tubes and sends the fault signal to the power protection interrupt pin of tms320f2806; Tms320f2806 immediately latches the output of PWM waveform and sends a power protection interrupt request to tms320f2806.4 Design of vector control software for three-phase induction motorVector transformation control (hereinafter referred to as vector control) is based on the system mathematical model established by the physical structure of the motor. Through a series of vector transformations (three-phase two-phase transformation (Clarke transformation), vector rotation transformation (Park transformation, park inverse transformation), the original system mathematical model is transformed into the equivalent orthogonal two-phase model (DQ model) in the common coordinate system , independently control each component of the relevant vector (such as current or flux linkage) in the common coordinate system. The control quantity (such as current and voltage) in the three-phase coordinate system is obtained by using the inverse transformation of the vector to realize the control of the induction motor.The common coordinate system (DQ) in the vector transformation control of induction motor usually establishes the d-axis on the vector position corresponding to a certain magnetic field, that is, the common coordinate system is determined by the magnetic field vector. Therefore, the vector transformation control of induction motor is also called field oriented control (FOC) There are three kinds of magnetic fields in three-phase induction motor: stator magnetic field, air gap synthetic magnetic field and rotor magnetic field, so there are three kinds of field oriented control methods. The rotor field oriented control is adopted in this system.4.1 vector control algorithm of three-phase induction motorIn order to achieve high-precision speed closed-loop control and magnetic field orientation, speed sensors must be installed on the motor shaft. However, it is not allowed to connect any speed and position detection elements externally in many occasions. The installation of speed sensors will reduce the reliability of the speed regulation system to a certain extent. Therefore, this paper adopts speed sensorless vector control frequency conversion speed regulation based on rotor flux orientation The functional block diagram of the orientation algorithm is shown in Figure 3. The key of the system design is to calculate the flux linkage and flux angle through the flux estimation module, and then estimate the rotor angular speed through the open-loop speed estimation module. The superscript "s" and "e" in Figure 3 represent the static coordinate system and synchronous rotation coordinate system respectively, the superscript "I" and "V" represent the current model and voltage model respectively, and the subscripts "d" and "Q" Represent the vector components on d-axis and q-axis respectively, and subscripts "s" and "R" represent the parameters of stator and rotor respectively.In order to make the system have good dynamic performance and steady-state accuracy, the speed controller and current controller adopt integral separated PI control. The given value of torque component ie * QS and excitation component ie * ds of stator current are given in the synchronous rotating coordinate system. Ie * QS is the output of speed controller, ie * DS is proportional to the given value of rotor flux linkage, and can be given directly. Two current controllers The output of is the two components ve * QS and ve * ds of the given value of the stator voltage vector in the synchronous rotating coordinate system. They pass through the inverse Park transform and space vector transform module, and then the pulse generation circuit of DSP finally generates the PWM signal. The current feedback signal obtains the feedback quantities IEDs and ieqs of the two currents through Clarke transform and park transform. The input of the flux estimation module is the voltage feedback signal Through the output of the phase voltage reconstruction module and the output of the Clarke transform, the rotor flux angle is calculated by the flux estimation module algorithm θλ r. Finally, the speed feedback value? R is obtained by the speed estimation module.4.2 realization of vector control software for three-phase induction motorThe control software is composed of initialization program and operation program. The software flow chart is shown in Figure 4. The initialization program completes the initialization and enable interrupt of DSP hardware and software variables. The operation program includes infinite cycle and interrupt service program. The interrupt service program consists of current and speed detection signal processing, coordinate transformation, flux estimation, open-loop speed estimation and SVPWM signal generation Each functional module is executed in a fixed time cycle according to a certain sequence, and the running of the program is interrupted by epwm1 time base cnt_zero.5 experimental resultsIn order to make the system have good portability, all physical variables (current, voltage, flux linkage, flux angle, speed, torque, etc.) are pre processed by per unit PU. Among them, the reference value of motor speed is set to ω* R = 0.5pu = 900 RPM (1pu = 1800 rpm), load torque T1 = 0.136pu (1 N.m), given value of excitation component ie * DS = 0.4pu (2 a). The system takes tms320f2806 DSP as the core and adopts 32-bit fixed-point algorithm (calling iqmath library function) , the program is written in C language. Through the simulation test in ccs2.2 development environment, the motor no-load and loading operation results are shown in Fig. 5 and Fig. 6. Compared with the two simulation results, the current waveform sinusoidal in this design scheme is good regardless of no-load or loading. The system can quickly reach the steady state, almost without overshoot, with small steady-state error and stable motor operation.6 ConclusionThe experimental results show that the speed sensorless vector control scheme proposed in this paper has reasonable design, high control accuracy and good dynamic and static performance. The system is based on high-performance digital signal processor tms320f2806, combined with the advantages of traditional voltage model method and current model method, can accurately observe the flux linkage in both high-speed and low-speed range, and complete the transformation control strategy in real time Coordinate transformation, speed control, current detection, flux estimation and PWM signal generation, so as to realize the high-performance variable frequency speed regulation control of three-phase induction motor.
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