Title :
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
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;
Conference_Titel :
Magnetics Conference, 2006. INTERMAG 2006. IEEE International
Conference_Location :
San Diego, CA
Print_ISBN :
1-4244-1479-2
DOI :
10.1109/INTMAG.2006.376221
