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1. 发明授权

US6005782A Flyback converter with soft switching using auxiliary switch and resonant circuit 失效
标题翻译：反激式转换器采用软开关辅助开关和谐振电路
公开(公告)号：US6005782A
公开(公告)日：1999-12-21
申请号：US173034
申请日：1998-10-16
申请人： Praveen K. Jain , Yan-Fei Liu , Youhao Xi
发明人： Praveen K. Jain , Yan-Fei Liu , Youhao Xi
IPC分类号： H02M1/34 , H02M3/335 , H02M1/12 , G05F1/10 , H02M3/24
CPC分类号： H02M1/34 , H02M3/33569 , H02M2001/342 , Y02B70/1433 , Y02B70/1491
摘要： A flyback converter has a main switch coupling a primary winding of a transformer between supply terminals, a duty cycle of the main switch controlling an output of the converter derived from a secondary winding of the transformer. Soft (zero voltage) switching of the main switch is facilitated by a snubber capacitor in parallel with the main switch. An auxiliary circuit coupled in parallel with the snubber capacitor and main switch includes a series-connected auxiliary switch, capacitor, and inductor coupled via another inductor to a full wave rectifier arrangement for recovering energy from the snubber capacitor. Resonant circuits provided by the auxiliary circuit facilitate soft switching of the auxiliary switch for low power loss and high frequency operation. The switches can be MOSFETs with reverse-poled diodes in parallel with their drain-source paths.
摘要翻译：反激式转换器具有主开关，其在电源端子之间耦合变压器的初级绕组，主开关的占空比控制从变压器的次级绕组获得的转换器的输出。主开关的软（零电压）开关由与主开关并联的缓冲电容器促成。与缓冲电容器和主开关并联耦合的辅助电路包括通过另一电感器耦合到全波整流器装置的串联辅助开关，电容器和电感器，用于从缓冲电容器恢复能量。由辅助电路提供的谐振电路便于辅助开关的软开关，用于低功耗和高频工作。这些开关可以是反向极化二极管与其漏源路径并联的MOSFET。

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