Research on Control Strategies of High-Frequency Soft-Switching Inverters for Electric Vehicles

Jiaxuan Li

doi:10.47297/taposatWSP2633-456921.20260705

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Research on Control Strategies of High-Frequency Soft-Switching Inverters for Electric Vehicles

7卷第5期

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Research on Control Strategies of High-Frequency Soft-Switching Inverters for Electric Vehicles
Research on Control Strategies of High-Frequency Soft-Switching Inverters for Electric Vehicles
Electrical Engineering, Shanghai University of Electric Power, Shanghai, 200090, China
2026年7卷第5期页码：105-114
网络首发：2026-07-15，

纸质出版：2026-05-30
DOI：10.47297/taposatWSP2633-456921.20260705
Accepted：

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Jiaxuan Li. (2026). Research on Control Strategies of High-Frequency Soft-Switching Inverters for Electric Vehicles. 科技理论与实践（英文版）, 7(5), 105-114.

Li Jiaxuan.Research on Control Strategies of High-Frequency Soft-Switching Inverters for Electric Vehicles[J].Theory and Practice of Science and Technology,2026,07(05):105-114.
Jiaxuan Li. (2026). Research on Control Strategies of High-Frequency Soft-Switching Inverters for Electric Vehicles. 科技理论与实践（英文版）, 7(5), 105-114. DOI： 10.47297/taposatWSP2633-456921.20260705.

Li Jiaxuan.Research on Control Strategies of High-Frequency Soft-Switching Inverters for Electric Vehicles[J].Theory and Practice of Science and Technology,2026,07(05):105-114. DOI： 10.47297/taposatWSP2633-456921.20260705.

摘要

Abstract

With the rapid advancement of the global "dual carbon" strategy and the growing demand for high power density in electric vehicle (EV) drivetrains

conventional silicon-based inverters are increasingly inadequate for modern EV applications. This paper investigates control strategies for high-frequency soft-switching inverters based on silicon carbide (SiC) MOSFETs. An H-bridge inverter model using the Cree C3M0016120K device was built in LTspice

with a sinusoidal pulse-width modulation (SPWM) scheme incorporating parameterized dead-time control to achieve zero-voltage switching (ZVS). At a 400V DC bus voltage and 20kHz switching frequency

comparative experiments between hard-switching and soft-switching modes were conducted across four dimensions: per-device switching loss

system conversion efficiency

low-order partial harmonic distortion (PHD)

and EMI spectral distribution. Results show that ZVS reduces the per-device loss and improves overall efficiency

while maintaining low harmonic distortion without additional output filtering. EMI analysis further reveals that soft switching suppresses discrete conducted interference spikes but broadens the high-frequency noise floor on the DC side. These findings demonstrate that combining high-frequency PWM with soft-switching technology offers a viable path toward higher efficiency

better power quality

and improved EMI performance in next-generation EV inverter systems.

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Keywords

references

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