Title :
Reduction effect of suspension input power using rotor eccentricity in a bearingless motor
Author :
Hara, Hiroshi ; Takemoto, Masatsugu ; Tanaka, Yasuhiro ; Chiba, Akira ; Fukao, Tadashi
Author_Institution :
Dept. of Mech. Syst. Eng., Musashi Inst. of Technol., Tokyo
Abstract :
Bearingless motors (BelMs) have two kinds of stator windings composed of motor windings and suspension windings in the same stator. Not only torque but also electromagnetic suspension force can be simultaneously generated in the same stator. Therefore, rotor shaft suspension can be realized without mechanical contacts and lubricant. In addition to advantages of magnetic bearings, the BelMs are expected to have advantageous features such as small size, low cost and high critical speed. This paper introduces reduction effect of suspension input power using rotor eccentricity actively in the BelMs. It is verified experimentally that the rotor eccentricity is effective in reducing the suspension input power.
Keywords :
electric motors; electromagnetic forces; machine windings; magnetic bearings; mechanical contact; bearingless motor; electromagnetic suspension force; magnetic bearings; mechanical contacts; motor windings; rotor eccentricity; rotor shaft suspension; stator windings; suspension input power reduction effect; suspension windings; Electromagnetic forces; Magnetic flux; Magnetic levitation; Prototypes; Reluctance motors; Rotors; Shafts; Stator cores; Stator windings; Torque;
Conference_Titel :
Electrical Machines and Systems, 2008. ICEMS 2008. International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-3826-6
Electronic_ISBN :
978-7-5062-9221-4
