Abstract A novel direct torque control(DTC) strategy based on torque angle is introduced in the paper for the permanent magnet synchronous motors(PMSMs) used in electric vehicles. The limits of flux linkage and torque angle are also discussed in the paper. The proposed strategy is based on torque-angle control, and the amplitude and angle of output voltage vector are directly determined by torque and flux linkage close-loop regulators respectively. The output voltage vector is synthetized by space vector modulation(SVM). Real time observation of torque angle ensures motor working on the stable operation range. Besides, the strategy with simple structure is unaffected by the change of inductance parameters. Experiment results show that the proposed strategy has good suitability and strong robusticity.
Qiu Xin,Huang Wenxin,Yang Jianfei等. A Direct Torque Control Strategy Based on Torque Angle for Permanent Magnet Synchronous Motors[J]. Transactions of China Electrotechnical Society, 2013, 28(3): 56-62.
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