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Inferior permanent magnet motor

專利號
US11177704B2
公開日期
2021-11-16
申請人
SAMSUNG ELECTRONICS CO., LTD.（KR Suwon-si）
發(fā)明人
Taeho Yoon; Junseok Kim; Hyungchul Lee; Byoungsoo Ko; Hongseok Kim
IPC分類
H02K1/27; H02K1/14; F25B1/04; H02K1/02; F04D25/06; H02K3/18
技術領域
permanent,magnet,flux,rotor,motor,barriers,magnets,stator,interior,θob
地域： Suwon-si

摘要

An interior permanent magnet motor includes a stator provided with a plurality of slots and a rotor rotatably disposed inside the stator. A plurality of permanent magnets of the same polarity are disposed at equal intervals in a circumferential direction inside the rotor. A plurality of flux bathers are provided on left and right sides of one end of each of the plurality of permanent magnets adjacent to an outer circumferential surface of the rotor. A ratio of a number of slots of the stator to a number of magnetic poles of the rotor is 3:2 or 3:4. The number of permanent magnets provided in the rotor is ? of the number of magnetic poles of the rotor.

說明書

Here, the angle θcp of the consequent pole 122 refers to an angle between two straight lines connecting the nearest ends of the flux barriers 125 and 128 provided at one end of the adjacent two permanent magnets 130 to the center C of the rotor 120. For example, in FIG. 11, the consequent pole angle θcp refers to an angle between a first straight line L3 connecting the center C of the rotor 120 and the left end of the left flux barrier 125 provided at one end 131 of the first permanent magnet 130 and a second straight line L5 connecting the center C of the rotor 120 and the right end of the right flux barrier 128 provided at one end 132 of the second permanent magnet 130.

When the flux barriers 125, 126, 127, and 128 are provided at both ends of the permanent magnet 130 as described above, the waveform of the voltage induced in the motor 100 may become bilaterally symmetrical and the distortion rate (THD: total harmonic distortion) of the counter electromotive force and the torque ripple may be reduced.

FIG. 13 is a partially enlarged cross-sectional view illustrating a case where a rotor of an interior permanent magnet motor according to an embodiment of the disclosure has no flux barrier.

權利要求

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