| 采用三相四桥臂抑制逆变器共模干扰的SPWM控制策略 |
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| 引用本文： | 黄劲,熊蕊,王志,左文平,邹云屏.采用三相四桥臂抑制逆变器共模干扰的SPWM控制策略[J].电工技术学报,2009,24(3). |
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| 作者姓名： | 黄劲 熊蕊 王志 左文平 邹云屏 |
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| 作者单位： | 华中科技大学电气与电子工程学院,武汉,430074 |
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| 摘 要： | 为了减少三相三桥臂逆变器因电路不对称而产生的共模电压和电流,提出了一种基于三相四桥臂结构的正弦波脉宽调制(SPWM)控制策略.该策略是在SPWM载波移相控制技术基础上,采用跳变后移控制方法,确保任何情况下逆变器四个桥臂的输出都能达到平衡,从而抑制共模干扰的产生.与原来的三相四桥臂SPWM载波移相控制策略相比,该策略突破了SPWM调制指数必须小于0.666的限制,避免了直流电压利用率低下的缺陷,适用于在任意调制指数情况下的工作.仿真和实验证明了该方法的有效性.
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| 关 键 词： | 三相四桥臂 逆变器 正弦波脉宽调制 共模干扰 载波移相 跳变后移 |
SPWM Control Strategy to Reduce Inverter Common-Mode Interferences Based on Three-Phase Four-Leg Structure |
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| Huang Jin,Xiong Rui,Wang Zhi,Zuo Wenping,Zou Yunping.SPWM Control Strategy to Reduce Inverter Common-Mode Interferences Based on Three-Phase Four-Leg Structure[J].Transactions of China Electrotechnical Society,2009,24(3). |
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| Authors: | Huang Jin Xiong Rui Wang Zhi Zuo Wenping Zou Yunping |
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| Affiliation: | Huazhong University of Science and Technology Wuhan 430074 China |
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| Abstract: | In order to reduce the common-mode(CM) voltage and CM current caused by the asymmetry of the circuit in the three-phase three-leg inverter,this paper proposes a novel sinusoidal pulse width modulation(SPWM) control strategy based on three-phase four-leg structure.This strategy,in which the SPWM jump-edge is delayed when zero-state appears,is an improved method on the basis of the SPWM carrier phase-shifting control technology.It can ensure the output balance of four legs in inverter under any conditions,and... |
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