Title :
Rotor design optimization of synchronous machine with two-part rotor
Author :
Gu, C.L. ; Chalmers, B.J. ; Lu, C.W.
Author_Institution :
Dept. of Electr. Eng., Huazhong Univ. of Sci. & Technol., Wuhan, China
Abstract :
To achieve saliency ratio and material utilization ratio as high as possible, the main design criteria of a synchronous machine with a two-part rotor, an axially laminated anisotropic (ALA) reluctance part and a surface permanent magnet (SPM) part axially-separated on the same shaft, are explored on the basis of magnetic field analysis including consideration of the saturation effects by FEM. Numerical results show that an optimal design can be obtained, with a larger ratio of pole pitch to air-gap (>400), a proper thickness ratio of insulation layer to iron sheet (0.5-1.0) and a proper laminated pole span (120-140°) in ALA part, and with a higher ratio of magnet height to air-gap (20-30), a proper permanent magnet pole span (130-150°) and a shorter longitudinal length in SPM part
Keywords :
air gaps; finite element analysis; laminations; machine theory; magnetic fields; optimisation; permanent magnet motors; reluctance motors; rotors; FEM; axially laminated anisotropic reluctance part; insulation layer thickness ratio; magnet height to air-gap ratio; magnetic field analysis; material utilization ratio; permanent magnet pole span; pole pitch to air-gap ratio; rotor design optimization; saliency ratio; surface permanent magnet part; synchronous machine; two-part rotor; Air gaps; Anisotropic magnetoresistance; Design optimization; Insulation; Magnetic analysis; Magnetic materials; Permanent magnets; Scanning probe microscopy; Shafts; Synchronous machines;
Conference_Titel :
Electric Machines and Drives Conference Record, 1997. IEEE International
Conference_Location :
Milwaukee, WI
Print_ISBN :
0-7803-3946-0
DOI :
10.1109/IEMDC.1997.604223
