Summary: | 碩士 === 國立臺灣海洋大學 === 電機工程學系 === 96 === With the ongoing development of power electronics technology, the inverter of IGBT are widely applied to power converting applications. It is well known that output over-voltage and energy loss during switching of inverter are the main causes for the damage of power electronic devices. To solve this problem, we first characterize the general behavior of IGBT with research, then energy loss of IGBT in both hard switching and soft switching is empirically studied. Based on these simulation results, this thesis proposes a new kind of snubber using passive lossless IGBT half-bridge inverter. Extensive simulations are carried out, and results of which verify that the snubber can suppress over-voltage and the switching loss can be effectively reduced.
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