TY - GEN
T1 - Current Balancing of Paralleled Switches in Resonant Converters with Multiphase Coupled Inductor
AU - Sen, Tanuj
AU - Baek, Jaeil
AU - Chen, Minjie
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021
Y1 - 2021
N2 - Paralleling power devices is a commonly used technique to implement high-capacity power converters. However, device mismatches and uneven circuit parasitics may cause current imbalance among devices, diminishing the benefits of paralleling. This paper investigates the current balancing mechanism of multiphase coupled inductors in resonant converters against a variety of circuit asymmetries and disturbances. The current balancing mechanism of coupled inductors for multiple parallel switches is explained in theory. A 1 MHz, 250 W resonant dc-dc converter with four GaN switches in parallel was built to test the effectiveness of a coupled inductor for current balancing. Simulation and experimental results show that paralleling multiple switching devices with a multiphase coupled inductor can greatly mitigate the impact of uneven circuit parasitics and gate signal mismatches and ensure current sharing, with negligible impact on the overall system behavior, including the dc-dc system efficiency.
AB - Paralleling power devices is a commonly used technique to implement high-capacity power converters. However, device mismatches and uneven circuit parasitics may cause current imbalance among devices, diminishing the benefits of paralleling. This paper investigates the current balancing mechanism of multiphase coupled inductors in resonant converters against a variety of circuit asymmetries and disturbances. The current balancing mechanism of coupled inductors for multiple parallel switches is explained in theory. A 1 MHz, 250 W resonant dc-dc converter with four GaN switches in parallel was built to test the effectiveness of a coupled inductor for current balancing. Simulation and experimental results show that paralleling multiple switching devices with a multiphase coupled inductor can greatly mitigate the impact of uneven circuit parasitics and gate signal mismatches and ensure current sharing, with negligible impact on the overall system behavior, including the dc-dc system efficiency.
KW - Common mode analysis
KW - Coupled inductor
KW - Differential mode analysis
KW - Inductance dual model
KW - Magnetic circuit model
KW - Resonant dc-dc converter
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U2 - 10.1109/COMPEL52922.2021.9646034
DO - 10.1109/COMPEL52922.2021.9646034
M3 - Conference contribution
AN - SCOPUS:85124241543
T3 - 2021 IEEE 22nd Workshop on Control and Modelling of Power Electronics, COMPEL 2021
BT - 2021 IEEE 22nd Workshop on Control and Modelling of Power Electronics, COMPEL 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 22nd IEEE Workshop on Control and Modelling of Power Electronics, COMPEL 2021
Y2 - 2 November 2021 through 5 November 2021
ER -