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Over-Voltage and Oscillation Suppression Circuit with Switching Losses Optimization and Clamping Energy Feedback for SiC MOSFET
ID：64 View Protection：PUBLIC Updated Time：2021-07-21 20:02:30 Hits：1441 Poster Presentation

Start Time：2021-08-27 12:04（Asia/Shanghai）

Duration：1min

Session：P Poster » P1Poster 1

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Abstract
The snubber circuit is a cost-effective solution to reduce the serious turn-off over-voltage and oscillation caused by the fast switching characteristics of SiC MOSFET. However, the turn-on switching losses will significantly increase due to the snubber decouples the power loop parasitic inductance during the switching process. In this paper, a SiC MOSFET over-voltage and oscillation suppression circuit (OVSC) with not only switching losses optimization feature but also the clamping energy feedback characteristic is proposed. The over-voltage and oscillation can be effectively suppressed by clamping capacitors, and those capacitors do not participate in the switching process until the over-voltage occurs, which is of benefit to the switching losses reduction compared with RC snubber circuits. Besides, the turn-off over-voltage and oscillation energy stored in clamping capacitors can be feedback to DC and load side through a passive branch composed of an energy feedback inductor and a diode. Experimental results show that OVSC has excellent over-voltage and oscillation suppression performance, and can significantly reduce switching losses compared with RC snubber circuits.
 
Keywords
SiC MOSFET, over-voltage and oscillation, snubber circuit, switching losses optimization.
Speaker
Yang ChengZi
Xi’an Jiaotong University

Submission Author
Yang ChengZi Xi’an Jiaotong University
Huaqing Li Xi'an Jiaotong University
Haoyuan Jin Xi’an Jiaotong University
龙洋 于 西安交通大学
Laili Wang Xi'an Jiaotong University
Yunqing Pei Xi'an Jiaotong University
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Important Date

  • Conference Date

    Aug 25

    2021

    to

    Aug 27

    2021

  • Apr 21 2021

    Abstract Submission Deadline

  • May 15 2021

    Abstract Notification of Acceptance

  • Jun 25 2021

    Final Paper Deadline

  • Aug 24 2021

    Contribution Submission Deadline

  • Aug 27 2021

    Registration deadline

Sponsored By
IEEE
IEEE ELECTRONIC DEVICE SOCIETY
Organized By
Huazhong University of Science and Technology
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