基于电流滞环控制的H桥级联型逆变器新型调制方法

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摘要首先介绍了H桥级联型逆变器常用的载波相移SPWM调制方法,基于相移原理与电流滞环控制提出了一种适用于H桥级联型逆变器的新型调制方法。其具有以下特点：①单个H桥采用与单极性SPWM调制相似的单极性电流滞环控制,脉冲产生简单,可以有效减少开关损耗；②通过动态调整滞环宽度来实现电流滞环控制时功率器件开关频率恒定,从而可以用类似相移SPWM脉冲产生方式来实现电流滞环控制时H桥级联型逆变器一相多H桥移相控制脉冲的产生。最后仿真与实验结果验证了本文所提方法的正确性。

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	朱思国
	欧阳红林
	刘鼎
	晏建玲

关键词 ：电流滞环控制, 单极性, 开关损耗, 相移SPWM

Abstract：This paper first introduces the commonly used carrier phase shift SPWM modulation method for cascaded H-bridge inverter. Based on the principle of phase shift and current hysteresis control, a new modulation method is proposed for cascaded inverter.It has the following characteristics: ①The control method is similar to unipolar SPWM modulation for a single H bridge.It is simple for pulse generator and can effectively reduce the switching losses. ②The phase-shifted control pulse for multi H bridges of a phase with current hysteresis control can be generated which is similar to the phase shift SPWM by dynamically adjusting the width of hysteresis to keep power device switching frequency constant.At last, the simulation and experimental results verify the correctness of the proposed method.

Key words： Current hysteresis control unipolar switching losses phase shift SPWM

收稿日期: 2011-05-16 出版日期: 2013-11-28

PACS:

TM921

基金资助:湖南省科学技术厅科技计划资助项目 (06CK3005)。

作者简介: 朱思国男，1979年生，博士研究生，研究方向为电力电子技术与高压变频调速。欧阳红林男，1965年生，博士，教授，博士生导师，研究方向为电力电子技术与高、低压变频调速，多相电机拖动等。

引用本文:

朱思国, 欧阳红林, 刘鼎, 晏建玲. 基于电流滞环控制的H桥级联型逆变器新型调制方法[J]. 电工技术学报, 2013, 28(2): 212-218. Zhu Siguo, Ouyang Honglin, Liu Ding, Yan Jianling. A New Modulation Method Based on Current Hysteresis Control for Cascaded H-Bridge Inverter. Transactions of China Electrotechnical Society, 2013, 28(2): 212-218.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2013/V28/I2/212

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