基于SHEPWM的中压大功率牵引永磁同步电机两电平控制

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Abstract PMSM has such advantages as compact structure, high power density, high air gap flux and high torque inertia ratio, etc. It has a very broad market prospect in the fields of medium-high voltage traction driving system. This paper researches the two level close-loop control technology of PMSM used in medium voltage high power traction system based on SHEPWM and presentes the system control strategy in the mode of non square-wave. It also researches the key control technologies of this strategy, such as the relationship between the angle value of the three-phase voltage in time domain and the voltage vector space angle, the engineering implementation method of SHEPWM and the dynamic switching methods of different PWM modes. Experiments prove that this control strategy is up to the requirement of cancellation harmonic, the current is smoothing in the process of dynamic switching, and the current of d and q axis was well tracked in the whole speed range.

Key words： Permanent magnet synchronous motor SHEPWM medium voltage high-power dynamic switching

Received: 20 March 2012 Published: 20 March 2014

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TM351

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	Guo Xinhua
	Wang Yongxing
	Zhao Feng
	Wen Xuhui

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Guo Xinhua,Wang Yongxing,Zhao Feng等. Two Level Control Technology of PMSM Used in Medium Voltage High Power Traction System Based on SHEPWM[J]. Transactions of China Electrotechnical Society, 2012, 27(11): 76-82.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2012/V27/I11/76

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