Work

Hybrid-Vector Deadbeat Model Predictive Torque Control for SPMSM With Improved Switching Loss and Synthesis Accuracy

Year: 2025

Type: article

Abstract: To improve the performance of the dual-vector model predictive torque control (MPTC) scheme for SPMSM, for sectors II, IV, and VI, this paper attempts to improve the traditional dual-vector modulation with three-segment symmetrical sequences from two aspects: switching loss and synthesis accuracy. First, the switching state of the zero vector is changed from 000 to 111, thereby reducing the number of switching actions by half within a PWM cycle. However, theoretical analysis and simulation results indicate that this dual-vector modulation will introduce more switching actions and losses between two consecutive PWM cycles. Therefore, the traditional dual-vector modulation has the minimum switching actions and cannot be further improved in switching loss. Then, the commutation instants are modified to increase another applied active vector, and the three-vector modulation with five-segment symmetrical sequences and no vector synthesis error is adopted in sectors II, IV, and VI. For other sectors, the dual-vector modulation with three-segment symmetrical sequences is adopted, which has only one switching action within a PWM cycle. Therefore, a hybrid-vector MPTC is formed. Finally, the feasibility and effectiveness of the proposed hybrid-vector MPTC for PMSM are verified by the experimental results, compared to the dual-vector MPTC with three-segment symmetrical sequences and the three-vector MPTC with five-segment symmetrical sequences, under the same switching frequency, the best control performance can be obtained with the minimum switching losses.

Source: IEEE Access

DOI: 10.1109/access.2025.3564405