Invention Grant
US09369015B2 Permanent magnet embedded motor and compressor, blower, and refrigerating and air conditioning apparatus using permanent magnet embedded motor 有权
永磁式嵌入式电动机和压缩机,鼓风机,以及使用永磁体嵌入式电动机的制冷空调装置

Permanent magnet embedded motor and compressor, blower, and refrigerating and air conditioning apparatus using permanent magnet embedded motor
Abstract:
A permanent magnet embedded motor includes a rotor and permanent magnets. The outer circumferential surface of the rotor is formed by divided outer circumferential surfaces divided at equal angle intervals in a circumferential direction corresponding to permanent magnets. The divided outer circumferential surface is formed by a first curved surface, a radial direction distance of which from a rotor axis is maximized in a circumferential direction center of divided outer circumferential surface and second curved surfaces formed from the circumferential direction both ends to the circumferential direction center and crossing the first curved surface. The second curved surfaces are formed by—arcuate surfaces each having the rotor axis as a central axis. A distance between both ends of the first curved surface is smaller than the width of a permanent magnet in a direction orthogonal to a radial direction in the circumferential direction center.
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