非对称半桥转换器
非对称半桥转换器, asymmetrical half-bridge DC to DC converter, 但是资料缺乏,不知道大家能否谈谈,相关的工程师可以交个朋友.
非对称半桥转换器
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Good idea
good idea, as I know, the theory is simply, and easy to understand, and can improve efficiency. but the problem is how to prevent the shoot-through, how to control the dead time, but don't use the professional driver IC to cost down and can be enter into mass production, and how to select the power switch and design the transformer to control the resonant cycle is a important consideration. Need to study carefully.
good idea, as I know, the theory is simply, and easy to understand, and can improve efficiency. but the problem is how to prevent the shoot-through, how to control the dead time, but don't use the professional driver IC to cost down and can be enter into mass production, and how to select the power switch and design the transformer to control the resonant cycle is a important consideration. Need to study carefully.
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@arthur.deng
Goodideagoodidea,asIknow,thetheoryissimply,andeasytounderstand,andcanimproveefficiency.buttheproblemishowtopreventtheshoot-through,howtocontrolthedeadtime,butdon'tusetheprofessionaldriverICtocostdownandcanbeenterintomassproduction,andhowtoselectthepowerswitchanddesignthetransformertocontroltheresonantcycleisaimportantconsideration.Needtostudycarefully.
come on
I know little about it, and i want to know more about it, but i have not related documents, why not paste some schematic to explain it in detail, and we can give our own opinion, i think it is a better way to discuss and study.
Longing for your schematic and related documents. thanks.
I know little about it, and i want to know more about it, but i have not related documents, why not paste some schematic to explain it in detail, and we can give our own opinion, i think it is a better way to discuss and study.
Longing for your schematic and related documents. thanks.
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@arthur.deng
Goodideagoodidea,asIknow,thetheoryissimply,andeasytounderstand,andcanimproveefficiency.buttheproblemishowtopreventtheshoot-through,howtocontrolthedeadtime,butdon'tusetheprofessionaldriverICtocostdownandcanbeenterintomassproduction,andhowtoselectthepowerswitchanddesignthetransformertocontroltheresonantcycleisaimportantconsideration.Needtostudycarefully.
shoot-through
我实在是查不到该词语shoot-through的汉语意思,特请指教?感谢!
我实在是查不到该词语shoot-through的汉语意思,特请指教?感谢!
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@sometimes
讨论过好多次了看delta公司的一篇文章虽然不是专门讲AHB,但是比较了各种拓扑在小功率场合的优缺点1078551788.pdf
thanks a lot
Thanks, I read this paper two years ago, and we tried AHB, but because the shoot-through problem on the mass production, so we changed to flyback. and based on this paper, we design QR mode flyback with SR for mass production. Thanks a lot. so do you have any other paper for it.
Thanks, I read this paper two years ago, and we tried AHB, but because the shoot-through problem on the mass production, so we changed to flyback. and based on this paper, we design QR mode flyback with SR for mass production. Thanks a lot. so do you have any other paper for it.
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@arthur.deng
thanksalotThanks,Ireadthispapertwoyearsago,andwetriedAHB,butbecausetheshoot-throughproblemonthemassproduction,sowechangedtoflyback.andbasedonthispaper,wedesignQRmodeflybackwithSRformassproduction.Thanksalot.sodoyouhaveanyotherpaperforit.
关于直通
我想移项全桥也有这个问题,不过现在已经大量应用.而AHB也有产品,说明是可以解决的.还有见过一个用半桥高频逆变的电源,频率高达500K.
我这里有AHB文章,不过都是理论性的,没有实际电路.
我想移项全桥也有这个问题,不过现在已经大量应用.而AHB也有产品,说明是可以解决的.还有见过一个用半桥高频逆变的电源,频率高达500K.
我这里有AHB文章,不过都是理论性的,没有实际电路.
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@arthur.deng
thanksalotThanks,Ireadthispapertwoyearsago,andwetriedAHB,butbecausetheshoot-throughproblemonthemassproduction,sowechangedtoflyback.andbasedonthispaper,wedesignQRmodeflybackwithSRformassproduction.Thanksalot.sodoyouhaveanyotherpaperforit.
could you give me these?
thanks
power000@126.com
thanks
power000@126.com
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so so
AHB seems to be attractive for its concise half bridge topology and ZVS capabilty and smaller output filters. but in fact it is not so good because of the following questions:
1. worst soft switching condition when low duty cycle
2.thermal dissipation problem when low duty cycle.
3.nonlinear output voltage gain via duty cycle.
4. bias magnetizing current in the transformer
5. worse dynamic performance
thus it is very difficult to develop a product with this topology especially for the new power electronics engineer.
AHB seems to be attractive for its concise half bridge topology and ZVS capabilty and smaller output filters. but in fact it is not so good because of the following questions:
1. worst soft switching condition when low duty cycle
2.thermal dissipation problem when low duty cycle.
3.nonlinear output voltage gain via duty cycle.
4. bias magnetizing current in the transformer
5. worse dynamic performance
thus it is very difficult to develop a product with this topology especially for the new power electronics engineer.
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@bullwd
sosoAHBseemstobeattractiveforitsconcisehalfbridgetopologyandZVScapabiltyandsmalleroutputfilters.butinfactitisnotsogoodbecauseofthefollowingquestions:1.worstsoftswitchingconditionwhenlowdutycycle2.thermaldissipationproblemwhenlowdutycycle.3.nonlinearoutputvoltagegainviadutycycle.4.biasmagnetizingcurrentinthetransformer5.worsedynamicperformancethusitisverydifficult todevelopaproductwiththistopologyespeciallyforthenewpowerelectronicsengineer.
I donot think so.
if there is the proregulator pfc, so the items above are no problem.
in fact, there have been this kind of products in some home appliance application.for example, PDP.
It is very popular.
if there is the proregulator pfc, so the items above are no problem.
in fact, there have been this kind of products in some home appliance application.for example, PDP.
It is very popular.
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PLS reference it, It's a type application circuit of fairchild(ML4800)1140613989.pdf
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@bullwd
sosoAHBseemstobeattractiveforitsconcisehalfbridgetopologyandZVScapabiltyandsmalleroutputfilters.butinfactitisnotsogoodbecauseofthefollowingquestions:1.worstsoftswitchingconditionwhenlowdutycycle2.thermaldissipationproblemwhenlowdutycycle.3.nonlinearoutputvoltagegainviadutycycle.4.biasmagnetizingcurrentinthetransformer5.worsedynamicperformancethusitisverydifficult todevelopaproductwiththistopologyespeciallyforthenewpowerelectronicsengineer.
高手超多.全EN看不大懂.
不过Bbullwd你老兄说的第1和2条我就不太明白了,好像大部分TP都会存在这类问题吧!不知老兄你是怎么理解这方面的,望指教!
不过Bbullwd你老兄说的第1和2条我就不太明白了,好像大部分TP都会存在这类问题吧!不知老兄你是怎么理解这方面的,望指教!
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