新型三点式软开关变流器

A New Three-Level Soft-Switched Converter

介绍了一种三点式恒频独立变流器,它使用一个耦合电感器来实现整个系统和负载范围内主开关的零电压开关。因为耦合电感器在负载电流回路中并不作为一个串联电感出现,所以它在输出整流管上并不造成负载循环损耗。在1kW样机上验证了推荐的变流器工作情况和性能。

A three-level, constant-frequency, isolated converter which employs a coupled inductor to achieve zero-voltage switching(ZVS) of the primary switches in the entire line and load range is described. Because the coupled inductor does not appear as a series inductancein the load current path, it does not cause a loss of duty cycle or severe voltage ringing across the output rectifiers. The operation and perfor-mance of the proposed converter was verified on a 1kW prototype.