An Improved Torque Control Strategy of PMSM Drive Considering On-Line MTPA Operation

Zhanqing Zhou, Xin Gu, Zhiqiang Wang, Guozheng Zhang and Qiang Geng
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Zhanqing Zhou: School of Artificial Intelligence, Tianjin Polytechnic University, Tianjin 300387, China
Xin Gu: School of Electrical Engineering and Automation, Tianjin Polytechnic University, Tianjin 300387, China
Zhiqiang Wang: School of Artificial Intelligence, Tianjin Polytechnic University, Tianjin 300387, China
Guozheng Zhang: School of Electrical Engineering and Automation, Tianjin Polytechnic University, Tianjin 300387, China
Qiang Geng: School of Electrical Engineering and Automation, Tianjin Polytechnic University, Tianjin 300387, China

Energies, 2019, vol. 12, issue 15, 1-17

Abstract: An improved direct torque control with space-vector modulation (DTC-SVM) scheme is presented in this paper. In the conventional DTC-SVM scheme, torque control performance is affected by the load conditions, due to the inappropriate linearization of the relationship between the flux angle and electromagnetic torque. Different from the conventional method, a torque controller with load angle estimation (TC-LAE) is proposed and the change rate of torque is regulated according to the variation of the load conditions, which could ensure the rapidity and consistency of torque performance at different load conditions. Meanwhile, an online permanent magnet synchronous motor and maximum torque per ampere (PMSM-MTPA) operation strategy based on the fitting solving method is proposed instead of the traditional two-dimensional look-up table, and the reference value of flux amplitude is calculated online to meet the MTPA requirement with the proposed method. The improved strategy is applied on a 6 kW PMSM, and the simulation and experimental results verified the effectiveness and the feasibility of the proposed strategy.

Keywords: direct torque control (DTC); permanent magnet synchronous motor (PMSM); maximum torque per ampere (MTPA) operation; DTC with space-vector modulation (DTC-SVM) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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