BIẾN ÁP HẠ ÁP XOAY CHIỀU ĐIỆN TỬ

Biến (hạ) áp điện tử  và ổn áp xoay chiều điện tử.

Xưa nay nói đến biến áp thì người ta nghĩ ngay đến “một cục” điện từ nặng nề, nặng khoảng 5 Kg / 1 KVA, kêu “rù rù” và tất nhiên là tổn hao điện năng lớn vì biến áp điện từ chỉ có hiệu suất 56% đến 65%.

Thiết bị gia dụng và công nghiệp gốc Âu Mỹ (và cả nội địa Nhật) thường tốt hơn hẳn sản phẩm tương tự của phần còn lại của thế giới nhưng dùng điện áp 100 VAC hay 120 VAC. Ví dụ nồi cơm điện (phần phát nhiệt vi ba), dàn âm thanh, khoan từ công nghiệp v.v… không thể sử dụng trong lưới điện VN, mà dùng kèm theo cái biến áp vài KVA, nặng hơn chục ký thì rõ ràng là nặng nề, kích rích và … hao điện.

Vì lý do đó mà Wambuakim nghĩ ra hạ áp xoay chiều điện tử, tầm nhìn kỹ thuật đến Ổn áp xoay chiều điện tử.

Biến áp hạ áp điện tử xoay chiều chỉ nặng vài trăm gam / KVA gói gọn được vào tay cắm / phích cắm điện là giải pháp cần thiết và vô cùng hợp lý trong trường hợp này. Lợi ích có lẽ không còn gì phải bàn cãi.

Thể theo yêu cầu của rất nhiều bạn quan tâm, Wambuakim cung cấp mạch điện dưới đây, chúng ta cùng thực hiện.

Sơ đồ lý thuyết mạch :

Dùng kỹ thuật SMPS với < 50% duty, chúng ta cho đầu ra công suất Mosfet hay IGBT chạy lớp D với tần số khoảng 10 KHz, ngõ ra LPF dùng LC. Hiệu suất đạt từ 92% đến 98%, với một chút ít thay đổi thì biến áp hạ áp điện tử này có thể điều khiển thang áp ngõ ra vô cấp, từ 10 VAC đến 200 VAC pure Sine Wave với điện áp đầu vào 220 VAC.

Phân tích mạch điện tử :

1/. Phần tạo xung PWM / điều tiết độ rộng xung dùng TL494.

2/. Ngõ ra của TL494 chia thành HS và LS. HS qua cách ly quang tốc độ cao: TLP250, TLP251, PC921, PC922, PC923 hoặc HCPL-315J, HCPL-316J vào thẳng base / HS BJT hoặc gate HS / Mosfet. LS vào thẳng base / LS BJT hoặc qua mạch gate driver vào gate LS / Mosfet.

3/. Hai biên âm và dương của dòng điện xoay chiều chạy riêng biệt và luân phiên với hai cặp HS – LS, được nối chung để hoàn nguyên điện áp hình Sin toàn kỳ.

4/. Ngõ ra tầng công suất qua LPF / LC xuất điện áp xoay chiều 110 VAC ra thiết bị hoặc vào ổ cắm riêng.

5/. Ổn định điện áp AC ngõ ra : Điện áp ngõ ra qua cầu điện trở + nắn, vào Opto P251 hồi tiếp về In-2 của TL494 điều chỉnh độ rộng xung để ổn áp ngõ ra.

Chúc các bạn thành công

5 / 12 / 2012

Wambuakim

Reup Oct 2020

481 Trả lời “BIẾN ÁP HẠ ÁP XOAY CHIỀU ĐIỆN TỬ”

    1. Là “người nhà” đó thôi. Anh đã công bố là mọi tài liệu của anh đều được tự do copy / paste / phóng tác mà không cần trích dẫn nguồn.

  1. I am extremely impressed with your writing skills as well as with
    the layout on your blog. Is this a paid theme or did
    you modify it yourself? Anyway keep up the nice quality writing,
    it is rare to see a great blog like this one these days.

  2. Today, I went to the beachfront with my children. I
    found a sea shell and gave it to my 4 year old daughter and said “You can hear the ocean if you put this to your ear.” She put the shell
    to her ear and screamed. There was a hermit crab inside and it pinched her ear.

    She never wants to go back! LoL I know this is entirely off topic but
    I had to tell someone!

  3. Thanks for the marvelous posting! I certainly enjoyed reading
    it, you are a great author.I will make certain to bookmark your
    blog and will come back very soon. I want to encourage you to ultimately continue your great job, have a nice
    evening!

    Take a look at my webpage … Coastal Hemp CBD

  4. 962098 742320Oh my goodness! an incredible write-up dude. Thanks a ton Nonetheless We are experiencing problem with ur rss . Dont know why Cannot enroll in it. Can there be any person locating identical rss dilemma? Anyone who knows kindly respond. Thnkx 618349

  5. Hello there, just became alert to your blog through Google, and found that it
    is truly informative. I am going to watch out for brussels.

    I’ll appreciate if you continue this in future. Numerous people will be benefited
    from your writing. Cheers!

    Feel free to surf to my page; Oracle Leaf CBD

  6. You are so awesome! I do not believe I’ve read through something
    like this before. So great to discover another person with unique
    thoughts on this subject. Seriously.. thank you for starting this up.
    This web site is something that’s needed on the web, someone with some originality!

    My blog post … Keto Fat Burn Pills

  7. 591940 504013Have you noticed the news has changed its approach recently? What used to neve be brought up or discussed has changed. Its that time to chagnge our stance on this though. 585857

  8. Fantastic goods from you, man. I’ve understand your stuff previous to and you’re just
    extremely magnificent. I really like what
    you have acquired here, certainly like what you’re saying and the way in which you say it.
    You make it entertaining and you still care for to keep it smart.
    I cant wait to read far more from you. This is actually a tremendous website.

    my web blog :: Green Leaf Hills CBD

  9. Hey! Do you know if they make any plugins to assist with SEO?
    I’m trying to get my blog to rank for some targeted keywords but I’m not seeing very good success.
    If you know of any please share. Appreciate it!

    Take a look at my website – NatureFused

  10. It’s genuinely very complicated in this active life to listen news on Television, therefore I only use internet for that purpose, and obtain the most recent news.

  11. Superb website you have here but I was wanting to know if you
    knew of any user discussion forums that cover the same
    topics discussed in this article? I’d really like to
    be a part of online community where I can get suggestions from other knowledgeable individuals that share the same interest.
    If you have any suggestions, please let me know.
    Appreciate it!

  12. I am not sure where you’re getting your info, but great topic.
    I needs to spend some time learning more or understanding more.

    Thanks for excellent information I was looking for this
    info for my mission.

  13. I have to thank you for the efforts you’ve put in penning this site.
    I’m hoping to view the same high-grade content from you later on as
    well. In fact, your creative writing abilities has encouraged me to get my own, personal site now 😉

  14. Its like you read my mind! You appear to know so
    much about this, like you wrote the book in it or something.
    I think that you could do with a few pics to drive the message
    home a little bit, but instead of that, this
    is magnificent blog. A great read. I will definitely be back.

    Look into my webpage TestoXmen

  15. I do trust all of the concepts you have introduced in your post.
    They’re really convincing and can certainly work. Nonetheless,
    the posts are too short for starters. Could you please lengthen them
    a little from subsequent time? Thank you for the post.

  16. Greetings from California! I’m bored to tears at work so I decided to browse your site on my iphone during lunch
    break. I love the info you provide here and can’t wait to take a look when I
    get home. I’m shocked at how fast your blog loaded on my cell phone ..
    I’m not even using WIFI, just 3G .. Anyhow, amazing site!

  17. Hmm it appears like your website
    ate my first comment (it was super long) so I
    guess I’ll just sum it up what I submitted and say, I’m thoroughly enjoying your
    blog.
    I too am an aspiring blog blogger but I’m still new to everything.
    Do you have any recommendations
    for newbie blog
    writers? I’d really appreciate it.

  18. Hello, i think that i noticed you visited my web site thus i got
    here to return the prefer?.I am trying to to find
    issues to enhance my site!I assume its good enough to make use of a
    few of your ideas!!

    Feel free to visit my page Rosemarie

  19. You can certainly see your enthusiasm within the paintings you write.
    The world hopes for even more passionate writers like you
    who aren’t afraid to mention how they believe.

    Always follow your heart.

    Here is my web blog; healthy diets

  20. Hello! I just wanted to ask if you ever have any trouble with hackers?

    My last blog (wordpress) was hacked and I ended
    up losing several weeks of hard work due to no data backup.

    Do you have any solutions to prevent
    hackers?

  21. I almost never create responses, but i did some searching and wound up here BIẾN ÁP HẠ ÁP XOAY CHIỀU ĐIỆN TỬ
    – Wambua. And I actually do have 2 questions for you if you don’t mind.
    Is it simply me or does it look like some of the responses look as if they are written by brain dead
    visitors? 😛 And, if you are writing on additional online sites, I’d like to
    keep up with anything fresh you have to post.

    Would you list of the complete urls of your shared pages like your twitter feed, Facebook page or linkedin profile?

    Feel free to surf to my web site :: healthy eating cookbook

  22. Excellent post. I was checking constantly this blog and I am impressed!
    Very helpful info specifically the last part 🙂 I care for such information a lot.
    I was looking for this particular info for a long time.
    Thank you and good luck.

    Review my page purchase hemp

  23. I like the valuable information you provide in your articles.

    I will bookmark your blog and check again here frequently.
    I am quite sure I will learn lots of new stuff right here!
    Best of luck for the next!

  24. I was wondering if you ever thought of changing
    the layout of your website? Its very well written; I love what youve got to say.

    But maybe you could a little more in the way of content so people could connect with it better.
    Youve got an awful lot of text for only having one or two images.
    Maybe you could space it out better?

  25. Today, I went to the beach with my children. I found a sea shell and gave it to my 4 year old daughter and said “You can hear the ocean if you put this to your ear.” She placed the shell to her ear and screamed. There was a hermit crab inside and it pinched her ear. She never wants to go back! LoL I know this is totally off topic but I had to tell someone!|

  26. Hey terrific website! Does running a blog such as this take a massive amount work? I have very little knowledge of computer programming however I had been hoping to start my own blog soon. Anyhow, if you have any ideas or techniques for new blog owners please share. I understand this is off topic but I simply wanted to ask. Thank you!|

  27. Hey there! Quick question that’s totally off topic. Do you
    know how to make your site mobile friendly? My blog looks weird when viewing from my iphone.
    I’m trying to find a theme or plugin that might be able to
    fix this problem. If you have any suggestions, please share.
    Appreciate it!

  28. you are in point of fact a excellent webmaster. The site loading velocity is incredible. It kind of feels that you are doing any unique trick. In addition, The contents are masterpiece. you’ve performed a great task in this matter!|

  29. I was suggested this web site by means of my cousin. I’m not positive whether or not this put up is written by him as no one else recognise such precise about my trouble. You’re amazing! Thanks!|

  30. Unquestionably believe that that you stated. Your favourite justification seemed to be on the net the simplest factor to take note of. I say to you, I definitely get irked even as other folks consider worries that they plainly don’t know about. You controlled to hit the nail upon the top as smartly as outlined out the whole thing with no need side-effects , other folks could take a signal. Will likely be again to get more. Thank you|

  31. Excellent goods from you, man. I’ve understand your stuff previous to and you’re just too fantastic. I really like what you have acquired here, really like what you’re saying and the way in which you say it. You make it entertaining and you still care for to keep it wise. I can not wait to read far more from you. This is really a wonderful site.|

  32. Hey! I know this is kinda off topic nevertheless I’d figured I’d ask. Would you be interested in trading links or maybe guest authoring a blog article or vice-versa? My blog discusses a lot of the same topics as yours and I think we could greatly benefit from each other. If you are interested feel free to shoot me an e-mail. I look forward to hearing from you! Great blog by the way!|

  33. Woah! I’m really digging the template/theme of this site. It’s simple, yet effective. A lot of times it’s tough to get that “perfect balance” between superb usability and visual appeal. I must say that you’ve done a superb job with this. Also, the blog loads super fast for me on Chrome. Excellent Blog!|

  34. I am not sure where you’re getting your info, but great topic. I needs to spend some time learning more or understanding more. Thanks for excellent info I was looking for this info for my mission.|

  35. Heya this is somewhat of off topic but I was wanting to know if blogs use WYSIWYG editors or if you have to manually code with HTML. I’m starting a blog soon but have no coding experience so I wanted to get advice from someone with experience. Any help would be greatly appreciated!|

  36. This is the perfect webpage for anybody who hopes to understand this topic. You realize so much its almost hard to argue with you (not that I personally will need to…HaHa). You certainly put a new spin on a topic that’s been discussed for many years. Great stuff, just excellent!|

  37. An impressive share! I’ve just forwarded this onto a co-worker who had been conducting a little homework on this. And he actually bought me breakfast because I discovered it for him… lol. So let me reword this…. Thank YOU for the meal!! But yeah, thanx for spending time to talk about this matter here on your web page.|

  38. I am curious to find out what blog platform you’re utilizing? I’m experiencing some small security problems with my latest website and I would like to find something more risk-free. Do you have any suggestions?|

  39. Новинки фільми, серіали, мультфільми 2021
    року, які вже вийшли Ви можете дивитися українською на нашому сайті Link

  40. excellent submit, very informative. I ponder why the other specialists of this sector do not understand this.
    You should continue your writing. I am confident, you have a huge readers’
    base already!

  41. Thanks for ones marvelous posting! I quite enjoyed reading it, you will be a great author.I will ensure that I bookmark your blog and will eventually come back in the foreseeable future. I want to encourage that you continue your great job, have a nice day!|

  42. I am really inspired with your writing skills as well as with the layout
    on your blog. Is this a paid subject matter or did you
    modify it yourself? Anyway stay up the nice quality writing, it’s uncommon to look a great blog like this one today..

  43. I am really impressed with your writing skills as well as with the layout on your
    blog. Is this a paid theme or did you modify it yourself?
    Anyway keep up the excellent quality writing,
    it is rare to see a nice blog like this one these
    days.

  44. I think that is among the so much vital info for me. And i’m happy reading your article.
    However wanna remark on some common things, The web site style is perfect, the articles is actually nice :
    D. Good task, cheers

  45. Heya i’m for the primary time here. I found this board and I to find It
    truly helpful & it helped me out much. I hope to present something again and aid others like you aided me.

  46. I’m really enjoying the design and layout of your blog. It’s a very easy on the eyes which makes it much more enjoyable for me to come here and visit more often. Did you hire out a developer to create your theme? Excellent work!|

  47. I simply could not depart your web site before suggesting that I really enjoyed the standard info a
    person supply for your guests? Is gonna be again ceaselessly in order to investigate cross-check
    new posts

  48. Very good blog you have here but I was wondering if you knew of any community forums
    that cover the same topics discussed here? I’d really like to be a part of online community where
    I can get feedback from other knowledgeable people that share the same
    interest. If you have any recommendations, please let me know.
    Bless you!

  49. Hello there! This article couldn’t be written much better! Looking at this post reminds me of my previous roommate! He constantly kept talking about this. I most certainly will send this information to him. Fairly certain he will have a very good read. Many thanks for sharing!|

  50. It’s actually a cool and helpful piece of information. I’m satisfied that you just shared this helpful information with us.

    Please keep us up to date like this. Thank you for sharing.

  51. Heya i am for the first time here. I found this board and I find It truly useful & it helped me out much.
    I hope to give something back and aid others like you aided me.

  52. Write more, thats all I have to say. Literally, it
    seems as though you relied on the video to make your point.
    You obviously know what youre talking about, why waste your intelligence on just posting
    videos to your site when you could be giving us something enlightening to read?

  53. I don’t even know how I stopped up here, but I assumed this post was great.
    I don’t recognize who you might be however
    certainly you’re going to a famous blogger if you happen to aren’t already.

    Cheers!

  54. Pretty nice post. I just stumbled upon your weblog and wanted to say that I’ve truly enjoyed surfing around your blog posts. In any case I’ll be subscribing to your rss feed and I hope you write again soon!|

  55. Hey are using WordPress for your site platform? I’m new
    to the blog world but I’m trying to get started and create my own.
    Do you require any html coding expertise to make your own blog?
    Any help would be really appreciated!

  56. Hello I am so thrilled I found your web site,
    I really found you by error, while I was browsing on Digg for something else,
    Anyhow I am here now and would just like to say thanks a lot for a marvelous post and a all round exciting blog (I also love
    the theme/design), I don’t have time to read it all at the minute but I have book-marked it and
    also added in your RSS feeds, so when I have time I will be back to read more, Please do keep up the excellent jo.

  57. Pingback: mazhor4sezon
  58. Greetings from Los angeles! I’m bored to death at work so I decided to check out your blog
    on my iphone during lunch break. I really like the knowledge you present here
    and can’t wait to take a look when I get home.

    I’m amazed at how quick your blog loaded on my phone .. I’m not even using WIFI, just
    3G .. Anyhow, fantastic site!

  59. Magnificent goods from you, man. I’ve understand your stuff previous
    to and you’re just extremely excellent. I actually like
    what you’ve acquired here, certainly like what you are saying and the way in which
    you say it. You make it entertaining and you still take care of to keep
    it sensible. I can not wait to read far more from you.
    This is actually a terrific website.

  60. Your style is very unique in comparison to other folks I’ve
    read stuff from. I appreciate you for posting when you’ve got the
    opportunity, Guess I’ll just bookmark this site.

  61. I do not know if it’s just me or if everybody else experiencing issues with your blog. It appears like some of the written text on your posts are running off the screen. Can someone else please provide feedback and let me know if this is happening to them as well? This might be a problem with my browser because I’ve had this happen before. Thanks|

  62. Hi, I do think this is an excellent web site. I stumbledupon it 😉 I may return yet again since I book-marked it. Money and freedom is the best way to change, may you be rich and continue to help other people.|

  63. I do trust all of the ideas you’ve introduced to your post.
    They are really convincing and will definitely work.
    Still, the posts are too short for novices. Could you please
    lengthen them a bit from next time? Thank you for the post.

Trả lời

Email của bạn sẽ không được hiển thị công khai. Các trường bắt buộc được đánh dấu *