Multi-Adjustment Strategy for Phase Current Reconstruction of Permanent Magnet Synchronous Motors Based on Model Predictive Control

Zhiming Liao (), Tianran Peng, Jia Liu and Tao Guo
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Zhiming Liao: National Maglev Transportation Engineering R&D Center, Tongji University, Shanghai 200092, China
Tianran Peng: School of Electrical Engineering, China University of Mining and Technology, Xuzhou 221116, China
Jia Liu: School of Electrical Engineering, China University of Mining and Technology, Xuzhou 221116, China
Tao Guo: School of Electrical Engineering, China University of Mining and Technology, Xuzhou 221116, China

Energies, 2023, vol. 16, issue 15, 1-16

Abstract: In response to the model predictive control (MPC) driving system, this paper proposes a multi-adjustment strategy for phase current reconstruction based on a coupled current sampling method. The proposed coupled current sampling method eliminates the need to modify the inverter’s internal wiring. The current signals utilized in the proposed method are all external current signals from the inverter and do not involve any current signals from the internal circuitry of the inverter. By analyzing the current sampling mechanism of duty-cycle model predictive control (DC-MPC) as a modulation method, the underlying principles of the non-reconstructible current regions in the coupled current sampling method are revealed. The non-reconstructible regions are accurately delineated into low and high-modulation regions using coupled current sampling. A multi-adjustment strategy for phase current reconstruction is proposed to address the non-reconstructible regions. In the low-modulation regions, phase current reconstruction is achieved through compensated voltage vector pulse injection. In the high-modulation regions, phase current reconstruction is accomplished using the zero-voltage vector insertion approximation method, which maintains the symmetry of the PWM waveform and avoids current distortion. Experimental results on a permanent magnet synchronous motor validate the effectiveness and feasibility of the proposed approach.

Keywords: phase current reconstruction; single current sensor; model predictive control; reconstruction dead band; reconstruction error (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: 2023
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