Design and analysis of a high speed double-sided axial flux permanent magnet motor suspended vertically by magnetic bearings

Güney Ö. F., Çelik A., Bozkurt A. F., Erkan K.

International Journal Of Applied Electromagnetics And Mechanics, vol.64, no.S1, pp.297-310, 2021 (SCI-Expanded)

  • Publication Type: Article / Article
  • Volume: 64 Issue: S1
  • Publication Date: 2021
  • Doi Number: 10.3233/jae-209526
  • Journal Name: International Journal Of Applied Electromagnetics And Mechanics
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.297-310
  • Yıldız Technical University Affiliated: Yes


This paper presents the electromagnetic and mechanical analysis of an axial flux permanent magnet (AFPM) motor for high speed (12000 rpm) rotor which is vertically suspended by magnetic bearings. In the analysis, a prototype AFPM motor with a double-sided rotor and a coreless stator between the rotors are considered. Firstly, electromagnetic analysis of the motor is carried out by using magnetic equivalent circuit method. Then, the rotor disk thickness is determined based on a rotor axial displacement due to the attractive force between the permanent magnets placed on opposite rotor disks. Hereafter, an analytical solution is carried out to determine the natural frequencies of the rotor-shaft system. Finally, 3D finite element analysis (FEA) is carried out to verify the analytical results and some experimental results are given to verify the analytical and numerical results and prove the stable high-speed operation.