Abstract：Because of higher switching speed of SiC MOSFET, crosstalk in a phase-leg configuration will be more serious. It will hinder the increase of switching frequency and reduce the reliability of power electronic equipment. This paper analyzes the crosstalk mechanisms of non-Kelvin package and Kelvin package, respectively. During the turn-on transition and turn-off transition of a switch, the displacement current of the gate-drain capacitor and the drop voltages on the common source inductors can induce the gate-source voltage variation of the off-state switch. Then, this paper proposes a new gate driver for suppressing crosstalk, which creates the low turn-off gate impedance. The operating principle and the parameters design are also analyzed. Finally, the crosstalk problems in non-Kelvin package and Kelvin package are tested by experiments. The experimental results of the proposed driver prove the effect of crosstalk suppression.
梁美, 李艳, 郑琼林, 赵红雁. 桥式电路中不同封装SiC MOSFET串扰问题分析及低栅极关断阻抗的驱动电路[J]. 电工技术学报, 2017, 32(18): 162-174.
Liang Mei, Li Yan, Zheng Trillion Q, Zhao Hongyan. Analysis for Crosstalk of SiC MOSFET with Different Packages in a Phase-Leg Configuration and a Low Gate Turn-Off Impedance Driver. Transactions of China Electrotechnical Society, 2017, 32(18): 162-174.
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2017, Vol. 32 
