A Coupled Inductor Based Circuit for Voltage Balancing among Series Connected SiC MOSFETs

Saizhen Chen; Chengmin Li; Zhebie Lu; Haoze Luo; Wuhua Li; Xiangning He

doi:10.1109/APEC39645.2020.9124078

A Coupled Inductor Based Circuit for Voltage Balancing among Series Connected SiC MOSFETs

Saizhen Chen
, Chengmin Li
, Zhebie Lu
, Haoze Luo
, Wuhua Li
, Xiangning He

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

15 Citations (Scopus)

Abstract

The voltage unbalance among the devices remains one of the critical challenges to connect the devices in series in medium voltage, high power applications. In this paper, a coupled inductor based RC snubber circuit is proposed to balance the voltages among the series connected SiC MOSFETs. The coupled inductors are applied as a gate drive signal amplitude compensation method to achieve high response speed. In conjunction with the widely adopted RC snubbers in voltage balancing technique, the coupled inductors are added to transfer the current deviation from the devices into a compensated gate source voltage. As a result, the voltage is actively balanced by simply using the passive components. Compared with the traditional RC snubber circuit, the proposed method realizes fine voltage adjustment so as to reduce the negative effect caused by parallel capacitors. Moreover, the proposed method only needs a coupled inductor with RC snubber circuit which is simple to realize. The operation principle of the coupled inductor is discussed and verified through experiments.

Original language	English
Title of host publication	2020 IEEE Applied Power Electronics Conference and Exposition, APEC 2020
Publisher	Institute of Electrical and Electronics Engineers
Pages	2588-2593
Number of pages	6
ISBN (Electronic)	978-1-7281-4829-8
DOIs	https://doi.org/10.1109/APEC39645.2020.9124078
Publication status	Published - 25 Jun 2020
Externally published	Yes
Event	35th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2020 - Ernest N. Morial Convention Center, New Orleans, United States Duration: 15 Mar 2020 → 19 Mar 2020 Conference number: 35 http://www.apec-conf.org/about

Conference

Conference	35th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2020
Abbreviated title	APEC 2020
Country/Territory	United States
City	New Orleans
Period	15/03/20 → 19/03/20
Internet address	http://www.apec-conf.org/about

Funding

This work is sponsored by the National Nature Science Foundations of China (U1834205, 51677166) and the Zhejiang Provincial Key Research and Development Program (2018C01SA150059).

Keywords

coupled inductor
series-connected devices
SiC MOSFET
voltage balancing

Access to Document

10.1109/APEC39645.2020.9124078

Cite this

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title = "A Coupled Inductor Based Circuit for Voltage Balancing among Series Connected SiC MOSFETs",

abstract = "The voltage unbalance among the devices remains one of the critical challenges to connect the devices in series in medium voltage, high power applications. In this paper, a coupled inductor based RC snubber circuit is proposed to balance the voltages among the series connected SiC MOSFETs. The coupled inductors are applied as a gate drive signal amplitude compensation method to achieve high response speed. In conjunction with the widely adopted RC snubbers in voltage balancing technique, the coupled inductors are added to transfer the current deviation from the devices into a compensated gate source voltage. As a result, the voltage is actively balanced by simply using the passive components. Compared with the traditional RC snubber circuit, the proposed method realizes fine voltage adjustment so as to reduce the negative effect caused by parallel capacitors. Moreover, the proposed method only needs a coupled inductor with RC snubber circuit which is simple to realize. The operation principle of the coupled inductor is discussed and verified through experiments.",

keywords = "coupled inductor, series-connected devices, SiC MOSFET, voltage balancing",

author = "Saizhen Chen and Chengmin Li and Zhebie Lu and Haoze Luo and Wuhua Li and Xiangning He",

year = "2020",

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doi = "10.1109/APEC39645.2020.9124078",

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booktitle = "2020 IEEE Applied Power Electronics Conference and Exposition, APEC 2020",

publisher = "Institute of Electrical and Electronics Engineers",

address = "United States",

note = "35th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2020, APEC 2020 ; Conference date: 15-03-2020 Through 19-03-2020",

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}

Chen, S, Li, C, Lu, Z, Luo, H, Li, W & He, X 2020, A Coupled Inductor Based Circuit for Voltage Balancing among Series Connected SiC MOSFETs. in 2020 IEEE Applied Power Electronics Conference and Exposition, APEC 2020., 9124078, Institute of Electrical and Electronics Engineers, pp. 2588-2593, 35th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2020, New Orleans, Louisiana, United States, 15/03/20. https://doi.org/10.1109/APEC39645.2020.9124078

A Coupled Inductor Based Circuit for Voltage Balancing among Series Connected SiC MOSFETs. / Chen, Saizhen; Li, Chengmin; Lu, Zhebie et al.
2020 IEEE Applied Power Electronics Conference and Exposition, APEC 2020. Institute of Electrical and Electronics Engineers, 2020. p. 2588-2593 9124078.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

TY - GEN

T1 - A Coupled Inductor Based Circuit for Voltage Balancing among Series Connected SiC MOSFETs

AU - Chen, Saizhen

AU - Li, Chengmin

AU - Lu, Zhebie

AU - Luo, Haoze

AU - Li, Wuhua

AU - He, Xiangning

N1 - Conference code: 35

PY - 2020/6/25

Y1 - 2020/6/25

N2 - The voltage unbalance among the devices remains one of the critical challenges to connect the devices in series in medium voltage, high power applications. In this paper, a coupled inductor based RC snubber circuit is proposed to balance the voltages among the series connected SiC MOSFETs. The coupled inductors are applied as a gate drive signal amplitude compensation method to achieve high response speed. In conjunction with the widely adopted RC snubbers in voltage balancing technique, the coupled inductors are added to transfer the current deviation from the devices into a compensated gate source voltage. As a result, the voltage is actively balanced by simply using the passive components. Compared with the traditional RC snubber circuit, the proposed method realizes fine voltage adjustment so as to reduce the negative effect caused by parallel capacitors. Moreover, the proposed method only needs a coupled inductor with RC snubber circuit which is simple to realize. The operation principle of the coupled inductor is discussed and verified through experiments.

AB - The voltage unbalance among the devices remains one of the critical challenges to connect the devices in series in medium voltage, high power applications. In this paper, a coupled inductor based RC snubber circuit is proposed to balance the voltages among the series connected SiC MOSFETs. The coupled inductors are applied as a gate drive signal amplitude compensation method to achieve high response speed. In conjunction with the widely adopted RC snubbers in voltage balancing technique, the coupled inductors are added to transfer the current deviation from the devices into a compensated gate source voltage. As a result, the voltage is actively balanced by simply using the passive components. Compared with the traditional RC snubber circuit, the proposed method realizes fine voltage adjustment so as to reduce the negative effect caused by parallel capacitors. Moreover, the proposed method only needs a coupled inductor with RC snubber circuit which is simple to realize. The operation principle of the coupled inductor is discussed and verified through experiments.

KW - coupled inductor

KW - series-connected devices

KW - SiC MOSFET

KW - voltage balancing

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DO - 10.1109/APEC39645.2020.9124078

M3 - Conference contribution

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BT - 2020 IEEE Applied Power Electronics Conference and Exposition, APEC 2020

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ER -

A Coupled Inductor Based Circuit for Voltage Balancing among Series Connected SiC MOSFETs

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