电动汽车用感应电机直接转矩控制系统的效率最优控制

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Abstract Aim at the demands of the high efficiency and fast dynamic response for electric vehicle drive systems, an efficiency optimization control strategy of direct torque controlled induction motor drives is proposed. Firstly, considering the core losses, the mathematical model of induction motor is established in the stator-field-oriented frame. Secondly, the function relationship between the power losses and the output torque, speed and stator flux is analyzed, and the computational formulation of the stator flux amplitude which makes the power losses minimization is derived at different operation conditions. Consequently, the efficiency optimization control for direct torque controlled induction motor drive systems is achieved. The simulation and experimental results show that the proposed control method not only preserves the fast torque dynamic response, but also improves the operation efficiency of the driving system at light load and lengthens the travel distance of electric vehicles.

Key words： Electric vehicle induction machine direct torque control power loss model efficiency optimization

Received: 20 November 2011 Published: 25 March 2014

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TM351

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	Zhang Xinghua
	Sun Zhenxing
	Wang Deming

Cite this article:

Zhang Xinghua,Sun Zhenxing,Wang Deming. Optimal Efficiency Control of Direct Torque Controlled Induction Motor Drives for Electric Vehicles[J]. Transactions of China Electrotechnical Society, 2013, 28(4): 255-260.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I4/255

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