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驱动脉冲边沿调制技术及其在开关尖峰抑制上的应用

DOI: 10.13334/j.0258-8013.pcsee.2015.06.024, PP. 1482-1489

Keywords: 脉冲边沿调制,数字控制,前脉冲群,开关电压尖峰,IGBT驱动

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Abstract:

随着现代电力电子技术的发展,功率半导体器件的开关速度和功率等级不断提高,关断尖峰成为其面临的非常严峻的问题。提出一种驱动脉冲边沿调制技术,通过调节前脉冲群的密度和宽度,能够在不改变外部电路的情况下,实现对脉冲边沿斜率的调节。将该技术应用于基于数字控制的驱动电路上可以降低功率半导体器件的开关尖峰,并且使驱动电路具有通用性。使用绝缘栅双极晶体管(insulatedgatebipolartransistor,IGBT)作为全控型功率半导体器件的典型代表,搭建测试平台,实验结果验证了该方法的正确性和实用性。

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