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采用电压箝位控制实现串联IGBT的动态均压
消耗积分:5 |
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大小:444 |
2010-02-19
王平
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IGBT 串联应用时面临的最大难题是动态均压。本文研究了电压箝位控制方法，它将IGBT 的集−射电压变化快速反馈至门极，改变门极驱动电压的大小，从而将集−射电压实时箝位于控制阈值之内，实现串联IGBT 的动态均压。本文通过2 个和8 个IGBT 串联的实验，验证了该方法的有效性。
Abstract: In the application of series-connected IGBTs, the biggest barrier to be conquered is dynamic voltage balancing. This paper investigates voltage clamping method. The changes of collector-emitter voltages of IGBTs are fed fast back to gates, which adjusts gate-driving voltages. Consequently, collector-emitter voltages are clamped within control thresholds and dynamic voltage balance of series-connected IGBTs is realized.
关键词﹕电压箝位控制，串联IGBT，动态均压
Keywords: Voltage clamping control, series-connected IGBTs, dynamic voltage balance
Abstract: In the application of series-connected IGBTs, the biggest barrier to be conquered is dynamic voltage balancing. This paper investigates voltage clamping method. The changes of collector-emitter voltages of IGBTs are fed fast back to gates, which adjusts gate-driving voltages. Consequently, collector-emitter voltages are clamped within control thresholds and dynamic voltage balance of series-connected IGBTs is realized.
关键词﹕电压箝位控制，串联IGBT，动态均压
Keywords: Voltage clamping control, series-connected IGBTs, dynamic voltage balance
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