Internal Model Current Decoupling Control Strategy for Induction Motors

Qiuyue Xie, Qiwei Xu (), Tao Yang and Yuxiaoying Tu ()
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Qiuyue Xie: College of Electrical & Information Engineering, Hunan Institute of Engineering, Xiangtan 411104, China
Qiwei Xu: State Key Laboratory of Power Transmission Equipment Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, China
Tao Yang: State Key Laboratory of Power Transmission Equipment Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, China
Yuxiaoying Tu: School of Intelligent Manufacturing, Wenzhou Polytechnic, Wenzhou 325035, China

Energies, 2025, vol. 18, issue 9, 1-16

Abstract: In order to improve the current dynamic performance of induction motor (IM) drive systems, an internal model current decoupling control strategy is proposed to suppress the stator’s internal coupling effect. First, the IM mathematical model in the complex frequency domain is established, and the expressions of the coupling terms are derived. Then, according to the zero-pole distribution diagram and Bode plots, the design details for the structure and parameters of the internal model controller are presented in a continuous domain, and the impact of stator inductance mismatch on decoupling performance is analyzed. In addition to considering sampling and control delays, the IM mathematical model is established in the discrete domain, and the principle of the controller parameter is presented. Finally, the experimental results prove that the proposed internal model current decoupling control strategy can effectively improve the dynamic performance of IMs. Compared with the traditional feedforward current decoupling control strategy, the proposed method has superior decoupling performance under the operating conditions of low switching frequency. At the same time, a better steady-state performance is obtained by the proposed internal model control strategy.

Keywords: current decoupling control; induction motor; internal model; dynamic performance (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: 2025
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