Lecture image placeholder

Premium content

Access to this content requires a subscription. You must be a premium user to view this content.

Monthly subscription - $9.99Pay per view - $4.99Access through your institutionLogin with Underline account
Need help?
Contact us
Lecture placeholder background


MMM 2022

November 07, 2022

Minneapolis, United States

Low Vibration Design of Variable Leakage Flux Permanent Magnet Motor Considering Multiple Working Conditions

In recent years, variable leakage flux permanent magnet (VLF-PM) motors, which can realize different operation conditions, have attracted increasing attention 1. In this kind of motors, by the purposeful design of flux barriers and PMs, design requirements of different operation conditions can be satisfied 2. It is noted that, under different working conditions, different flux density distribution often leads to significant changes in radial electromagnetic force distribution and characteristics of vibration noise 3. Thus, it is necessary to design and analyze the characteristic of vibration noise of VLF-PM motor under multiple working conditions. In this paper, the characteristics of electromagnetic vibration of VLF-PM motor under different working conditions are researched. And, an low vibration design method is proposed for VLF-PM motors, considering multiple working conditions. Fig. 1 shows the proposed VLF-PM motor and operation principle under different operation conditions. Fig. 2 presents the characteristics of electromagnetic vibration of the VLF-PM motor in different working regions. According to the operation principle, two typical working points are selected for analysis. The sensitivity of design parameters to the desired optimization objective are depicted in Fig. 3, and the selected sensitive parameters are marked. The characteristics of sensitive design parameters are illustrated in Fig. 4. The basic electromagnetic performances under two working points are shown in Fig. 5. It can be seen that under the two working conditions, the output torque of the two motors is almost the same, and the torque ripple of the optimal motor is obviously reduced. Fig. 6 shows the vibration characteristics of VLF-PM motor. Due to the lower amplitudes of low-order radial force density, especially, 4th, the vibration and noise characteristics of the optimal VLF-PM motor is preferred under the two working points, which verifies the effectiveness of the low vibration design of the VLF-PM motor proposed in this paper. More detailed analysis and experimental verification will be presented in the full paper.


1 H. Hu, Z. Xiang and X. Zhu, IEEE Transactions on Magnetics, vol. 58, no. 2, pp. 1-6, Feb. 2022, Art no. 8102606.
2 X. Zhou, X. Zhu and W. Wu, IEEE Transactions on Industrial Electronics, vol. 68, no. 8, pp. 6516-6526, Aug. 2021.
3 M. S. Islam, R. Islam and T. Sebastian, IEEE Transactions on Industry Applications, vol. 50, no. 5, pp. 3214-3222, Sept.-Oct. 2014.

Next from MMM 2022

Airgap Harmonic

Airgap Harmonic

MMM 2022

Jiawei Ren
Jiawei Ren and 2 other authors

07 November 2022

Stay up to date with the latest Underline news!

Select topic of interest (you can select more than one)


  • All Lectures
  • For Librarians
  • Resource Center
  • Free Trial
Underline Science, Inc.
1216 Broadway, 2nd Floor, New York, NY 10001, USA

© 2023 Underline - All rights reserved