Modulation Method for Reducing Current Zero-Crossing Distortion of VIENNA Rectifier

doi:10.16628/j.cnki.2095-8188.2021.02.015

Abstract

Abstract:

The inherent problem of the VIENNA rectifier is that distortion may occur at the current zero crossing point.To solve this problem,a modulation method that can minimize the current zero-crossing distortion is proposed.Firstly,according to the control method of the VIENNA rectifier,the principle of current zero-crossing distortion is analyzed.Then,a function to quantify the actual output voltage deviation of the rectifier is proposed.And the minimum distortion of the actual output voltage at the current zero-crossing point is achieved.Finally,the feasibility and superiority of the modulation method proposed in this paper are verified by experiments.

Key words: VIENNA rectifier, current zero-crossing distortion, unit power factor, deviation

CLC Number:

TM461

ZHANG Qingyan, WANG Peidong, HUANG Xinmei, WANG Juncan, GUI Zaiyi, ZHANG Wei. Modulation Method for Reducing Current Zero-Crossing Distortion of VIENNA Rectifier[J]. LOW VOLTAGE APPARATUS, 2021, 0(2): 81-87.

Figures/Tables 10

References 17

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电流方向	S_x	x相的输出电平
i_x>0	1	0
i_x>0	0	1
i_x≤0	1	0
i_x≤0	0	-1

参数	数值
直流侧电压/V	750
直流上下电容容值/μF	3 900
功率较小的负载1/Ω	120
功率较大的负载2/Ω	80
开关频率/Hz	16 000
基频/Hz	50