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Volume 13
Issue 18
10.3390/electronics13183766
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Article

A Voltage Equalization Strategy for Series-Connected SiC MOSFET Applications

by
Peng Li
1,
Jialin Liu
2,
Shikai Sun
2,*,
Wenhao Yang
1,
Yuyin Sun
1 and
Yuming Zhang
1
1
School of Microelectronics, Xidian University, Xi’an 710071, China
2
Beijing Microelectronics Technology Institute, Beijing 100076, China
*
Author to whom correspondence should be addressed.
Electronics 2024, 13(18), 3766; https://doi.org/10.3390/electronics13183766
Submission received: 19 August 2024 / Revised: 16 September 2024 / Accepted: 20 September 2024 / Published: 22 September 2024
(This article belongs to the Special Issue Wide-Bandgap Device Application: Devices, Circuits, and Drivers)
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Abstract

A novel clamped voltage equalization strategy is presented for series-connected Silicon Carbide (SiC) Metal–Oxide semiconductor Field-Effect transistors (MOSFETs) in this paper. Differences in device parameters and circuit asymmetry result in the uneven voltage distribution of series-connected SiC MOSFETs, which threatens the safe operation of the circuit. Dynamic voltage equalization is difficult to achieve due to the fast switching speed of SiC MOSFETs. This paper analyzes the switching characteristics and dynamic voltage equalization characteristics of SiC MOSFETs. Based on the analysis, an energy recovery strategy based on the clamping auxiliary circuit is proposed. A 2.8 kW (50 KHz) prototype is fabricated and tested to verify the strategy. Measurement results show that the maximum voltage stress is suppressed from 600 V to less than 320 V in the experimental condition.
Keywords: SiC MOSFETs; series-connected; voltage equalization; overvoltage SiC MOSFETs; series-connected; voltage equalization; overvoltage

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MDPI and ACS Style

Li, P.; Liu, J.; Sun, S.; Yang, W.; Sun, Y.; Zhang, Y. A Voltage Equalization Strategy for Series-Connected SiC MOSFET Applications. Electronics 2024, 13, 3766. https://doi.org/10.3390/electronics13183766

AMA Style

Li P, Liu J, Sun S, Yang W, Sun Y, Zhang Y. A Voltage Equalization Strategy for Series-Connected SiC MOSFET Applications. Electronics. 2024; 13(18):3766. https://doi.org/10.3390/electronics13183766

Chicago/Turabian Style

Li, Peng, Jialin Liu, Shikai Sun, Wenhao Yang, Yuyin Sun, and Yuming Zhang. 2024. "A Voltage Equalization Strategy for Series-Connected SiC MOSFET Applications" Electronics 13, no. 18: 3766. https://doi.org/10.3390/electronics13183766

APA Style

Li, P., Liu, J., Sun, S., Yang, W., Sun, Y., & Zhang, Y. (2024). A Voltage Equalization Strategy for Series-Connected SiC MOSFET Applications. Electronics, 13(18), 3766. https://doi.org/10.3390/electronics13183766

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