Soft switching three level inverter with passive snubber circuit (S3L inverter)
Soft switching three level inverter with passive snubber circuit (S3L inverter)
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发表时间：
2011-09
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通讯作者：
M. Gekeler
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作者：
M. Gekeler
这里介绍的是一个三电平电压源逆变器的电力驱动，不间断电源和主饲料。与通常的硬开关拓扑不同，它是完全软开关。增加了一种新颖的专利缓冲电路，该电路结构非常简单，仅由几个无源元件组成。该缓冲电路原则上无损耗地工作;三电平电压源逆变器中的所有开关操作原则上无开关损耗。为此，即使利用经济的标准IGBT，也可以实现高达约40 kHz的非常高的开关频率值和高达98%以上的非常高的效率。特别是利用IGCT时，要强调有效的di/dt限制，其在没有IGCT的附加感应电压应力的情况下工作。
Presented here is a three level voltage source inverter for electric drives, uninterruptable power supplies and for mains feeds. Unlike the usual hard switching topologies, it is implemented as completely soft switching. A novel patented snubber circuit is added, which is structured very simply and consists of only a few passive components. This snubber circuit works in principle without any losses; all switching operations in the three level voltage source inverter are in principle free of switching losses. For this reason, very high values of switching frequency up to about 40 kHz, and very high efficiencies up to more than 98%, can be realized, even with utilization of economical standard IGBT's. In particular with utilization of IGCT's, an effective di/dt limitation is to be emphasized, which works without additional inductive voltage stressing of the IGCT's.