用特征网络优化开关频率的SVPWM控制方法

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Abstract On the α ′ β ′ plane, this paper presents the space vector modulation algorithm and analyzes the distribution rule of basic vectors. A concept of characteristics quadrangle and characteristics network is used. This paper uses the basic switching to traverse the vertex of the sector only along the side of the characteristics network for optimizing switching frequency of inverter. Very small number of switching can be obtained. For a three-cell seven-level inverter and on the basis of the variations of the reference voltage, this paper finds that the characteristics quadrangle can be divided into three types and gives corresponding algorithm of the switching times. At last, the simulation results and experimental waveforms show that the algorithm is correct. The output voltage waveform is well approximate to the reference vector. Compared with the phase disposition sinusoidal modulation (PD SPWM) method, the total switching times in one reference voltage period of the proposed modulation algorithm is only 38.6% of PD SPWM.

Key words： Inverter multi-level space vector modulation(SVM) switching frequency characteristics network

Received: 11 October 2010 Published: 20 March 2014

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TM464

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	Wang Cui
	Meng Zhiqiang

Cite this article:

Wang Cui,Meng Zhiqiang. SVPWM Control Method on Optimization Switching Frequency Using Characteristic Network[J]. Transactions of China Electrotechnical Society, 2012, 27(8): 49-55.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2012/V27/I8/49

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