永磁同步电机改进电流预测控制

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Abstract In order to ensure high dynamic performance of whole system, high performance permanent magnet synchronous motor servo applications often require fast response current inner loop. Widely used PI regulator is prone to overshoot and of poor dynamic characteristics, therefore, it is often difficult to meet this requirement. Predictive control strategy is able to achieve fast dynamic response while avoiding overshoot. However, it relies on accurate mathematical model of the controlled object. This paper presents an improved predictive current control method of permanent magnet synchronous motor, where two adjacent prediction models are subtracted to eliminate constant items. In this way, the closed-loop control of current is achieved. With respect to the traditional predictive control method, the improved method employs only one motor parameter, effectively reducing the dependence on the model parameters, while the closed-loop structure can avoid the steady state error. Relative to PI regulator, the improved method is able to track the current command rapidly without overshoot and oscillation. The simulation and experimental results show that the improved method proposed here achieves excellent dynamic and static performance.

Key words： Permanent magnet synchronous motor (PMSM) servo system predictive control PI regulator

Received: 20 September 2012 Published: 25 March 2014

PACS:

TM315

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	Articles by authors
	Wang Weihua
	Xiao Xi
	Ding Youshuang

Cite this article:

Wang Weihua,Xiao Xi,Ding Youshuang. An Improved Predictive Current Control Method for Permanent Magnet Synchronous Motors[J]. Transactions of China Electrotechnical Society, 2013, 28(3): 50-55.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I3/50

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