Radial and axial force calculation of BLDC motor with passive magnetic bearing

Author

Fengxiang, Wang ; Jiqiang, Wang ; Zhiguo, Kong ; Fengge, Zhang

Author_Institution

Sch. of Electr. Eng., Shenyang Univ. of Technol.

Volume

1

fYear

2004

fDate

14-16 Aug. 2004

Firstpage

290

Abstract

A new structure of brushless DC (BLDC) motor with passive magnetic bearings is introduced in this paper. The magnetic suspension of the rotor is realized by using the proposed passive magnetic bearings and does not need to be controlled. The axial stability of the rotor can be obtained by the radial force of the passive magnetic bearings and by the instinctive behavior of the PM motor in axial alignment of the stator and rotor. The radial magnetic suspension of the machine rotor can be realized by the optimal design of the air-gap length, thickness and axial length of the PM rings both of the passive magnetic bearings and the BLDC motor based on the accurate calculation of radial and axial forces

Keywords

brushless DC motors; machine bearings; magnetic forces; permanent magnets; rotors; stability; stators; BLDCM; PM motor; air-gap length; axial force calculation; brushless DC motor; magnetic suspension; optimal design; passive magnetic bearing; permanent magnet; radial force calculation; rotor axial stability; stator;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Motion Control Conference, 2004. IPEMC 2004. The 4th International

Conference_Location

Xi´an

Print_ISBN

7-5605-1869-9

Type

conf

Filename

1377829