Torque-Angle-Based Direct Torque Control for Interior Permanent-Magnet Synchronous Motor Drivers in Electric Vehicles

Xin Qiu; Wenxin Huang; Feifei Bu

Torque-Angle-Based Direct Torque Control for Interior Permanent-Magnet Synchronous Motor Drivers in Electric Vehicles

Xin Qiu

Wenxin Huang

Feifei Bu

Vol. 13, No. 6, pp. 964-974, Nov. 2013

10.6113/JPE.2013.13.6.964

Dead-time compensation

Direct torque control

Interior permanent-magnet synchronous motor

Torque accuracy

Torque angle

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Abstract

A modified direct torque control (DTC) method based on torque angle is proposed for interior permanent-magnet synchronous motor (IPMSM) drivers used in electric vehicles (EVs). Given the close relationship between torque and torque angle, proper voltage vectors are selected by the proposed DTC method to change the torque angle rapidly and regulate the torque quickly. The amplitude and angle of the voltage vectors are determined by the torque loop and stator flux-linkage loop, respectively, with the help of the position of the stator flux linkage. Furthermore, to satisfy the torque performance request of EVs, the nonlinear dead-time of the invertor caused by parasitic capacitances is considered and compensated to improve steady torque performance. The stable operation region of the IPMSM DTC driver for voltage and current limits is investigated for reliability. The experimental results prove that the proposed DTC has good torque performance with a brief control structure.

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Cite this article

[IEEE Style]

X. Qiu, W. Huang, F. Bu, "Torque-Angle-Based Direct Torque Control for Interior Permanent-Magnet Synchronous Motor Drivers in Electric Vehicles," Journal of Power Electronics, vol. 13, no. 6, pp. 964-974, 2013. DOI: 10.6113/JPE.2013.13.6.964.

[ACM Style]

Xin Qiu, Wenxin Huang, and Feifei Bu. 2013. Torque-Angle-Based Direct Torque Control for Interior Permanent-Magnet Synchronous Motor Drivers in Electric Vehicles. Journal of Power Electronics, 13, 6, (2013), 964-974. DOI: 10.6113/JPE.2013.13.6.964.