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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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

Received: 16 May 2011 Published: 28 November 2013

PACS:

TM921

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	Zhu Siguo
	Ouyang Honglin
	Liu Ding
	Yan Jianling

Cite this article:

Zhu Siguo,Ouyang Honglin,Liu Ding等. A New Modulation Method Based on Current Hysteresis Control for Cascaded H-Bridge Inverter[J]. Transactions of China Electrotechnical Society, 2013, 28(2): 212-218.

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

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