Research on EMI Suppression in Series-end Winding Inverters Based on Real-time Model Predictive VSFPWM

doi:10.11985/2024.01.022

Abstract

Abstract:

The common-mode electromagnetic interference(EMI) generated by the switching process of pulse width modulation (PWM) inverters has a significant negative impact on the system. The new series-end winding inverter topology is used as the research object, and the variable switching frequency pulse width modulation(VSFPWM) technique based on the current ripple prediction model is adopted to realize the accurate control of current ripple and accomplish the spreading suppression of common-mode EMI and the reduction of switching loss while considering the effect of inductor saturation in the actual inverter system. The model predictive VSFPWM strategy considering inductor saturation in series-end winding topology is proposed, and the performance of EMI suppression effect, output current quality and switching loss under different VSFPWM strategies are compared and analyzed by simulation and experiment, which verify that the proposed strategy can effectively suppress common-mode EMI, reduce switching losses, and ensure satisfying output current waveforms.

Key words: Series-end winding inverter, model predictive control, variable switching frequency, EMI suppression

CLC Number:

TM561

HUANG Jilan, ZHANG Jiahua, LIU Zicheng, WANG Zhiyuan, ZHAO Xuan. Research on EMI Suppression in Series-end Winding Inverters Based on Real-time Model Predictive VSFPWM[J]. Journal of Electrical Engineering, 2024, 19(1): 206-215.

Figures/Tables 20

References 20

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参数	数值
母线电压V_dc/V	100
调制比m	0.2
负载电阻R/Ω	2
负载电感初始值L₀/μH	700
基波频率f₀/Hz	50
固定开关频率f_s/kHz	20

策略	THD(%)	电流纹波峰峰值/A
CSFPWM	5.22	1.018
RSFPWM	5.39	1.063
不考虑饱和的模型预测	7.62	1.452
考虑饱和的模型预测	7.60	1.018

开关策略	电流纹波峰峰值/A	开关次数	E_SW	THD(%)
CSFPWM	1.02	400	3 429	6.95
考虑饱和VSFPWM	1.02	366	3 155	7.61
不考虑饱和VSFPWM	1.02	304	2 606	7.59