Rotor, motor and electrical device including the motor
AssigneeNidec Corporation
InventorsSheng-Chan YEN, Hsin-Nan LIN, Yu-Wei HSU, Cheng-Tsung LIU
Life of this patent
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Abstract
A motor includes a stator including wound multiphase coils and stator slots that accommodate the multiphase coils, and a rotor provided at an inner side of the stator. Poles are provided in a direction of rotation, and sets of flux barriers are provided on the rotor, each of the poles respectively corresponding to a set of the flux barriers. A ratio between a total number of the stator slots and a product of a total number of poles of the rotor and a phase number of the multiphase coils is a non-integer. With the structure of the motor, a torque ripple is reduced while an output torque is kept unchanged.
Claims10
A motor, comprising:
- a stator including wound multiphase coils and stator slots that accommodate the multiphase coils;
- and
- a rotor provided at an inner side of the stator, a plurality of poles being provided in a direction of rotation, sets of flux barriers being provided on the rotor, each of the poles respectively corresponding to one of the sets of flux barriers;
- wherein
- a ratio between a total number of the stator slots and a product of a total number of poles of the rotor and a phase number of the multiphase coils is a non-integer.
A rotor, comprising:
- poles provided in a direction of rotation of the rotor;
- sets of flux barriers provided on the rotor, each of the poles corresponding to one of the sets of flux barriers;
- wherein
- in respective ones of the sets of flux barriers corresponding to each of the poles, included angles between lines from two points on a circumferential edge of at least one flux barrier respectively to a center of the rotor and a central line are unequal by taking a line extending from the center of the rotor to a direction with a maximum reluctance as a central line;
- and/or
- in respective ones of the sets of flux barriers corresponding to each of the poles, widths of circumferential edges of at least one flux barrier in a circumferential direction are unequal by taking the line extending from the center of the rotor to the direction with the maximum reluctance as a central line.
Dependencies are inferred from the claim text.