基于LLC感应加热电源IGBT并联电容降低开关损耗探讨
Electric Engineering(2019)
Abstract
针对LLC感应加热电源在扫频控制方式下存在IGBT关断损耗较大的问题,采用在IGBT的CE两端并联电容的方法来降低开关管的关断损耗.通过对关断状态下电路的分析,得出IGBT的关断损耗与CE两端并联电容的定量关系,并以此为参考依据选取合适的并联电容值,同时满足IGBT的ZVS开通和降低IGBT的关断损耗.最后通过试验验证了这种方法的有效性.
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