【摘要】 随着电力电子开关器件工作频率的提高，器件的开关损耗和开关应力也随之增大，软开关ＰＷＭ技术是目前较好的解决方法．文中分析了一个特殊的Ｈ型软开关单元，并在理论上提出了一种软开关ＳＰＷＭ的实现方法．在此基础上，把软开关ＳＰＷＭ技术应用到功率因数提高技术中，从而达到较理想的变流效果．仿真结果和理论分析论证了这种软开关ＳＰＷＭ的可实现性及其与功率因数提高技术的可结合性．更多还原

【Abstract】 With the arising of switching frequency of power electronic element, the switching loss and stress become greater.As one of the new methods to get over those problems,a special H soft switched cell is studied.By using this cell, a new method to realize soft switched SPWM is presented.And then this new method with power factor improving technology is used to realize a converter.The theory analysis and simulation prove the feasibility and compatibility for this new method in practice.更多还原