电动汽车用IPMSM直接转矩控统效率优化

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Abstract An online efficiency optimization method of direct torque control (DTC) system is proposed to increase the range of electric vehicles (EVs) using interior permanent magnet synchronous motor (IPMSM). First of all, the iron loss and copper loss are analyzed and the loss of convert is included in copper loss to study the electromagnetic loss of IPMSM drive system comprehensively. The change rules of copper loss and total electromagnetic loss varying with stator flux linkage are also investigated, based on which, a discrete efficiency optimization method is raised to fit the variable-speed operating mode of EVs. The proposed method separates the EV operating range into several sections according the speed and torque, and the optimization search operation in each section is independent. For this reason, the method has little special demand for search algorithms. Experiment results show the validity and feasibility of the method.

Key words： Interior permanent magnet synchronous machine direct torque control efficiency optimization electric vehicle

Received: 12 December 2012 Published: 30 November 2015

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TM301.2

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2015/V30/I22/42

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