Current boundary‑based predictive current control of induction machines with lower switching frequencies

Xin Qi; Chenyu Wang; Boxuan Tian; Mario Pacas; Xiangyang Shi; Aibin Jia

Current boundary‑based predictive current control of induction machines with lower switching frequencies

Vol. 24, No. 2, pp. 204-214, Feb. 2024

10.1007/s43236-023-00715-y

Predictive control

Low switching frequency

Induction motor

Abstract

An excessively high switching frequency causes significant losses in inverters, especially in high-power applications, which should be avoided. Predictive control, based on a circular boundary restriction strategy presented in this paper, can effectively suppress current distortion while reducing the switching frequency. Until now, this method has been implemented with the same boundaries for both the torque component and flux component of the stator current vector. Due to the physical behavior of an induction motor, a higher current distortion tolerance of the flux component of the stator current vector can be accepted without affecting the torque. Therefore, in this work, the circular boundary restriction strategy is modified to configure larger boundaries for the flux component than for the torque component. This is done to achieve an even lower switching frequency. Furthermore, an additional improvement can be expected if only the boundaries of the torque component are strictly maintained, while the magnetizing current can exceed its boundary to some extent. The predictive control method based on this new strategy is experimentally tested to determine its feasibility. A method based on the circular boundary strategy is also implemented under the same testing conditions, and the performances of both strategies are compared.

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Cite this article

[IEEE Style]

X. Qi, C. Wang, B. Tian, M. Pacas, X. Shi, A. Jia, "Current boundary‑based predictive current control of induction machines with lower switching frequencies," Journal of Power Electronics, vol. 24, no. 2, pp. 204-214, 2024. DOI: 10.1007/s43236-023-00715-y.

[ACM Style]

Xin Qi, Chenyu Wang, Boxuan Tian, Mario Pacas, Xiangyang Shi, and Aibin Jia. 2024. Current boundary‑based predictive current control of induction machines with lower switching frequencies. Journal of Power Electronics, 24, 2, (2024), 204-214. DOI: 10.1007/s43236-023-00715-y.