一种改进的矩阵变换器双电压合成控制策略

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Abstract Commutation failure and output waveform distortion caused by lots of narrow PWM pulses which are generated using the traditional two line voltage synthesis strategy when the expected output voltage is low. Aiming at this condition, an improved line-to-line voltage strategy is presented after analyzing the characteristic of the traditional strategy and the mechanism of commutation failure caused by narrow pulse. With the improved strategy, the expected output line-to-line voltage is synthesized by the middle and minimum input line-to-line voltage in a sampling cycle. The number of narrow pulses can be reduced about 80% when the expected output voltage is low. The voltage error caused by the PWM pulses whose pulse length is shorter than a commutation time can be reduced, which decreases the harmonics of output voltage and input current. The control performance of matrix converter under low expected output voltage condition is improved. Finally, computer simulation and experiment proved the correctness and validity of the improved control strategy.

Key words： Matrix converter two line voltage synthesis strategy narrow pulse voltage harmonics

Received: 11 September 2007 Published: 13 February 2014

PACS:

TM301

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	Ma Xinghe
	Tan Guojun
	Wang Xudong
	Yuan Shiying
	Zhao Junying

Cite this article:

Ma Xinghe,Tan Guojun,Wang Xudong等. An Improved Two Line Voltage Synthesis Control Strategy of Matrix Converter[J]. Transactions of China Electrotechnical Society, 2009, 24(4): 126-132.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2009/V24/I4/126

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作者简介: 马星河男, 1979年生, 博士, 副教授, 研究方向为计算机控制及新型变换器。谭国俊男, 1962年生, 教授, 博士生导师, 研究方向为大功率电力传动及新型变换器。