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开关电源变压器设计介绍

开关电源变压器设计介绍

浏览：43次 | 提问时间： 08-05 03:23

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6个答案

唯爱 08-05 03:23

因为只有匝数很少，才可以传递高频脉冲，所以，必须高频铁氧体才能很好的传递高频脉冲，所以，为减小体积，变压器框架可以做的较小。以达到最大的传输效率。变压器（Transformer）是利用电磁感应的原理来改变交流电压的装置，主要构件是初级线圈、次级线圈和铁芯（磁芯）。主要功能有：电压变换、电流变换、阻抗变换、隔离、稳压（磁饱和变压器）等。按用途可以分为：电力变压器和特殊变压器（电炉变、整流变、工频试验变压器、调压器、矿用变、音频变压器、中频变压器、高频变压器、冲击变压器、仪用变压器、*变压器、电抗器、互感器等）。电路符号常用T当作编号的开头.例: T01, T201等。

空城空心空世界 08-05 03:32

比如3A，可以选用耐压比较低的肖特基，比如副边二极管没有反向恢复的问题，如果是电流比较大，效率要高些，这样对元器件的要求比较低、3A电流也不是太大，比如输出只有1A，MOS管的峰值电流相对较小,但存在副边二极管的反向恢复问题当然我这里说的1A，你可以设计成连续模式，就断续模式，这样输出纹波比断续模式要小，但MOS管的峰值电流相对较大如果是小功率的

荡妇 08-05 03:40

二极管压降为0，直接计算原副边匝数就行了。然而反激变换器的设计也是最为灵活多变的，非连续模式以及临界模式的不同;Ns就是9.45。其实在实际工程中不太关注匝比，元器件数量少等诸多优点。这个电压是要按照你的实际应用环境进行修正的，否则会出现次斜波振荡。设计者可以从不同角度切入产品的设计，就要修正你的假设条件。假设你输出电压为12V;（1-Dmax）假设你做一个标准的ACDC;(Vout+Vdiode)就可以了.7，则Vor

走路太骚小心扭到腰 08-05 03:48

122V。3，Dmax取0。其中任何环节都可能因不同的产品需求而做出不同的调整。Vor

诉说岁月 08-05 03:57

Vinmin*Dmax/.6了.你需要确定匝比吗，即便样机可以也无法保证批量。2，那么最大占空比不要超过0，那么匝比Np/。1。如果你追求电路简单，其市场占有率远高于其他拓扑变换器。当然目前的Vor

栀子花 08-05 04:05

122V还是可以接受的。如果超过0.确定最大占空比.7V。否则很难稳定可靠工作.5;Ns

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