一种改进型单相图腾柱整流器平均电流控制方法

doi:10.16180/j.cnki.issn1007-7820.2023.05.004

Abstract

Abstract:

In order to effectively suppress the harmonic pollution caused by power electronic equipment to the power grid and solve the problem of energy shortage, high-efficiency AC/DC PFC converter has attracted extensive attention. In order to solve the problems of conversion efficiency and current zero-crossing distortion of totem pole PFC converter, the diode in traditional topology is replaced by power switching tube, and an improved average current control strategy based on CCM mode is proposed. The control strategy improves the control mode of high-frequency bridge arm, reduces diode freewheeling loss and improves the conversion efficiency of the converter by introducing complementary PWM. The working principle and control strategy of totem pole topology circuit are described in detail, and the proposed strategy is simulated based on MATLAB/Simulink platform. On this basis, a prototype is designed and built. The experimental results show that the conversion efficiency of the proposed method is improved by 1.5%, and the current has no obvious zero-crossing peak, which proves the effectiveness and feasibility of the proposed improved control strategy.

Key words: harmonic pollution, converter, PFC, totem pole, high efficiency, CCM, average current, PWM

CLC Number:

TP303

XIA Yuanshuai,XIE Ming,YANG Yang,YAO Lei. An Improved Average Current Control Method for Single-Phase Totem Pole Rectifier[J].Electronic Science and Technology, 2023, 36(5): 23-27.

Figures/Tables 14

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References 16

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名称	导通电阻/mΩ	正向压降/V
SiC MOS管	30	4.1
SiC二极管	—	1.4
Si MOS管	620	—

参数名称	参数值	参数名称	参数值
电网电压	50 V	直流电容	2 000 μF
滤波电感	3.5 mH	负载电阻	108 Ω
直流电压	90 V	开关频率	50 kHz

	交流电压 /V	交流电流 /A	输出电压 /V	效率 /%
传统	50	1.50	90	94.0
改进	50	1.58	90	97.5

An Improved Average Current Control Method for Single-Phase Totem Pole Rectifier

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