VP3-05 Analysis of Stator Iron Loss in Permanent Magnet Synchronous Motor Under Rotating Magnetization Based on Field-Oriented Control
Creators: Hongtao Shi
Shuaichao Yue
Yongjian Li and Jiatong Yin
Publisher: name: IEEE
Year: 2025

The electric drive systems of modern new energy vehicles predominantly rely on vector control technology (FOC). Hence, investigating the impact of different modulation parameters under FOC control on the magnetic flux density distribution in the stator core of PMSMs is of significant importance for enhancing motor efficiency and analyzing losses. The paper outlines the design of an 8-pole 12-slot interior permanent magnet synchronous motor, where both the stator core and rotor are constructed using non-oriented electrical steel strip B25AV1300, with a laminated core thickness of 40mm. Simultaneously, this study measures and calculates the hysteresis losses of the non-oriented electrical steel strip B25AV1300 under alternating and rotating magnetization. Therefore, to investigate the effect of magnetic flux density distribution in the stator core on the iron losses of PMSM, four characteristic positions on the stator core were selected. Holes were drilled and windings were applied at the teeth, yoke, and between the teeth and yoke, each with a diameter of 1mm and a single turn of winding. Additionally, one slot was chosen for teeth winding and yoke winding, with sensor wires drawn out and subsequently connected to the acquisition device.[1] The two-dimensional planar view of the motor after drilling is depicted in Figure 1. Upon establishing the finite element simulation platform and the experimental apparatus, various modulation parameters of the PMSM excitation are altered to analyze the variations in magnetic flux density at four typical characteristic positions of the PMSM under different modulation conditions. A meticulous analysis of the rotating magnetization process is conducted, followed by the testing and calculation of stator core iron losses[2]-[3]. This research establishes a connection between modulation parameters, rotating magnetization, and stator iron losses. The overall framework of the experimental platform is illustrated in Figure 2.References: [1] Okamoto S, Denis N, Kato Y, et al. Core loss reduction of an interior permanent-magnet synchronous motor using amorphous stator core[J]. IEEE Transactions on Industry Applications, 2016, 52(3): 2261-2268. [2] Liu G, Liu M, Zhang Y, et al. High-speed permanent magnet synchronous motor iron loss calculation method considering multiphysics factors[J]. IEEE Transactions on Industrial Electronics, 2019, 67(7): 5360-5368. [3]Fan X, Li W, Sun Y, et al. Iron Loss Evaluation of Permanent Magnet Synchronous Motor using FEM and hysteresis model combined method[C]//2022 IEEE 3rd China International Youth Conference on Electrical Engineering (CIYCEE). IEEE, 2022: 1-5.
The electric drive systems of modern new energy vehicles predominantly rely on vector control technology (FOC). Hence, investigating the impact of different modulation parameters under FOC control on the magnetic flux density distribution in the stator core of PMSMs is of significant importance for enhancing motor efficiency and analyzing losses. The paper outlines the design of an 8-pole 12-slot interior permanent magnet synchronous motor, where both the stator core and rotor are constructed using non-oriented electrical steel strip B25AV1300, with a laminated core thickness of 40mm. Simultaneously, this study measures and calculates the hysteresis losses of the non-oriented electrical steel strip B25AV1300 under alternating and rotating magnetization. Therefore, to investigate the effect of magnetic flux density distribution in the stator core on the iron losses of PMSM, four characteristic positions on the stator core were selected. Holes were drilled and windings were applied at the teeth, yoke, and between the teeth and yoke, each with a diameter of 1mm and a single turn of winding. Additionally, one slot was chosen for teeth winding and yoke winding, with sensor wires drawn out and subsequently connected to the acquisition device.[1] The two-dimensional planar view of the motor after drilling is depicted in Figure 1. Upon establishing the finite element simulation platform and the experimental apparatus, various modulation parameters of the PMSM excitation are altered to analyze the variations in magnetic flux density at four typical characteristic positions of the PMSM under different modulation conditions. A meticulous analysis of the rotating magnetization process is conducted, followed by the testing and calculation of stator core iron losses[2]-[3]. This research establishes a connection between modulation parameters, rotating magnetization, and stator iron losses. The overall framework of the experimental platform is illustrated in Figure 2.References: [1] Okamoto S, Denis N, Kato Y, et al. Core loss reduction of an interior permanent-magnet synchronous motor using amorphous stator core[J]. IEEE Transactions on Industry Applications, 2016, 52(3): 2261-2268. [2] Liu G, Liu M, Zhang Y, et al. High-speed permanent magnet synchronous motor iron loss calculation method considering multiphysics factors[J]. IEEE Transactions on Industrial Electronics, 2019, 67(7): 5360-5368. [3]Fan X, Li W, Sun Y, et al. Iron Loss Evaluation of Permanent Magnet Synchronous Motor using FEM and hysteresis model combined method[C]//2022 IEEE 3rd China International Youth Conference on Electrical Engineering (CIYCEE). IEEE, 2022: 1-5.