VP5-07 A New Hybrid-excited Permanent Magnet Arc Motor with Different Permanent Magnet Arrays Exhibiting Flux-reversal Effect in Dual Stators
Creators: Nan Chen
Shuhua Fang
Xiangru Lin
Qiangren Xu
and Zihan Chen
Publisher: name: IEEE
Year: 2025

The rapid development of permanent magnet (PM) materials, especially rare earth permanent magnets has brought out the further performance improvement of PM motors. Due to the significant advantages as simple structure, small loss, high efficiency and high power-density, the PM motors have gradually attracted the attention of researchers [1] [2]. To make full use of the inner cavity space of the motor, and thus improve the power density and torque density of the motor, two-stator structure have been adopted [3] . Aiming at achieving the flux regulation function, the dc-biased sinusoidal current is injected, which is beneficial for improving the electromagnetic performance of the proposed hybrid-excited doubly salient dual-PM machine [4]. Arc motors with low torque ripple and high torque density are researched [5]. This paper proposes an innovative hybrid-excited PM arc motor (HE-PMAM) with different PM arrays displaying flux-reversal effect in dual stators. The topology and working principle of HE-PMAM are briefly introduced. Then, the flux regulation of the HE-PMAM is analyzed. The HE-PMAM is composed of three module motors, and each module motor is composed of a construction of 11 rotor-poles and 6 stator-slots of inner and outer stators respectively. The PMs in the dual stators exhibit the flux-reversal effect. With the adoption of dual-stator structure, the robust rotor modulates the magnetomotive force produced by PMs on both sides to enhance the flux modulation effect and generate abundant air-gap flux density harmonics. The HE-PMAM operates mainly based on the flux modulation.The direct-current (dc) biased armature windings are beneficial to achieving flux regulation through adjusting the dc without additional field windings. As shown in Fig. 2, the average output torque of the HE-PMAM increases from 446mNm to 539mNm as the dc changes from -1.6A to 0.8A while the alternating current (ac) remains 2.3A (RMS value), which is the rated current value. It can be concluded from Fig. 2 that the HE-PMAM has a good flux-regulation capability.References: [1] B. Kim and T. A. Lipo, IEEE Trans. Ind. Appl., vol. 52, no. 1, pp. 217-225, Jan.-Feb. 2016. [2] M. Onsal, Y. Demir and M. Aydin, IEEE Trans. Magn., vol. 58, no. 2, pp. 1-5, Feb. 2022. [3] H. Wang, H. Zhu and S. Ding, IEEE Trans. Magn., vol. 58, no. 8, pp. 1-6, Aug. 2022. [4] Y. Meng, S. Fang and Z. Pan, IEEE Trans. Appl. Supercond., vol. 31, no. 8, pp. 1-5, Nov. 2021. [5] Z. Pan and S. Fang, IEEE Trans. Ind. Inform., vol. 17, no. 11, pp. 7523-7534, Nov. 2021.
The rapid development of permanent magnet (PM) materials, especially rare earth permanent magnets has brought out the further performance improvement of PM motors. Due to the significant advantages as simple structure, small loss, high efficiency and high power-density, the PM motors have gradually attracted the attention of researchers [1] [2]. To make full use of the inner cavity space of the motor, and thus improve the power density and torque density of the motor, two-stator structure have been adopted [3] . Aiming at achieving the flux regulation function, the dc-biased sinusoidal current is injected, which is beneficial for improving the electromagnetic performance of the proposed hybrid-excited doubly salient dual-PM machine [4]. Arc motors with low torque ripple and high torque density are researched [5]. This paper proposes an innovative hybrid-excited PM arc motor (HE-PMAM) with different PM arrays displaying flux-reversal effect in dual stators. The topology and working principle of HE-PMAM are briefly introduced. Then, the flux regulation of the HE-PMAM is analyzed. The HE-PMAM is composed of three module motors, and each module motor is composed of a construction of 11 rotor-poles and 6 stator-slots of inner and outer stators respectively. The PMs in the dual stators exhibit the flux-reversal effect. With the adoption of dual-stator structure, the robust rotor modulates the magnetomotive force produced by PMs on both sides to enhance the flux modulation effect and generate abundant air-gap flux density harmonics. The HE-PMAM operates mainly based on the flux modulation.The direct-current (dc) biased armature windings are beneficial to achieving flux regulation through adjusting the dc without additional field windings. As shown in Fig. 2, the average output torque of the HE-PMAM increases from 446mNm to 539mNm as the dc changes from -1.6A to 0.8A while the alternating current (ac) remains 2.3A (RMS value), which is the rated current value. It can be concluded from Fig. 2 that the HE-PMAM has a good flux-regulation capability.References: [1] B. Kim and T. A. Lipo, IEEE Trans. Ind. Appl., vol. 52, no. 1, pp. 217-225, Jan.-Feb. 2016. [2] M. Onsal, Y. Demir and M. Aydin, IEEE Trans. Magn., vol. 58, no. 2, pp. 1-5, Feb. 2022. [3] H. Wang, H. Zhu and S. Ding, IEEE Trans. Magn., vol. 58, no. 8, pp. 1-6, Aug. 2022. [4] Y. Meng, S. Fang and Z. Pan, IEEE Trans. Appl. Supercond., vol. 31, no. 8, pp. 1-5, Nov. 2021. [5] Z. Pan and S. Fang, IEEE Trans. Ind. Inform., vol. 17, no. 11, pp. 7523-7534, Nov. 2021.