Study of Retaining Sleeve and Conductive Shield and Their Influence on Rotor Loss in High-Speed PM BLDC Motors

Author

Zhou, F. ; Shen, J. ; Fei, W. ; Lin, R.

Author_Institution

Zhejiang Univ., Hangzhou

fYear

2006

fDate

8-12 May 2006

Firstpage

497

Lastpage

497

Abstract

In the paper, a 2-pole 3-phase high-speed PM BLDC motor with ratings of 3kW @ 150,000rpm is considered, the magnets being SmCo. In order to improve the mechanical strength, the rotor is usually protected with a non-magnetic sleeve, such as a carbon fiber sleeve which has very low electrical conductivity but poor thermal conductivity, or titanium alloy / stainless steel sleeve which has high electrical and thermal conductivity. The influence of different retaining sleeves on the rotor loss is analyzed with FEM.

Keywords

brushless DC motors; cobalt alloys; eddy current losses; electrical conductivity; permanent magnet motors; rotors; samarium alloys; thermal conductivity; SmCo; brushless direct current motors; carbon fiber sleeve; conductive shield; high-speed PM BLDC motors; low electrical conductivity; magnets; mechanical strength; nonmagnetic sleeve; permanent magnet motors; power 3 kW; retaining sleeve; rotor loss; stainless steel sleeve; thermal conductivity; titanium alloy; Brushless DC motors; Conducting materials; Eddy currents; Magnetic analysis; Magnetic losses; Permanent magnet motors; Permanent magnets; Rotors; Thermal conductivity; Titanium alloys;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2006. INTERMAG 2006. IEEE International

Conference_Location

San Diego, CA

Print_ISBN

1-4244-1479-2

Type

conf

DOI

10.1109/INTMAG.2006.376221

Filename

4261930