Title:
MOTOR
Document Type and Number:
Japanese Patent JP2023180834
Kind Code:
A
Abstract:
To provide a synchronous type motor that can reduce cogging torque without reducing output torque.SOLUTION: In a motor, a radial outer surface of a magnet insertion hole 24 of a rotor core has a pair of magnet opposite faces 245 opposite to the ends of a first magnet 22 and a second magnet 23, and a pair of circumferential end faces 246 extending from the ends in a circumferential direction of the magnet opposite faces 245 along an outer peripheral surface of the rotor core. The motor satisfies (0.92≤RT/ST≤0.96). RT: the center angle of each intersection between the magnet opposite faces 245 and the circumferential end faces 246. ST: with the magnetic pole corresponding number defined by dividing the total number of teeth 32 by the total number of magnetic poles composed of the first magnets 22 and the second magnets 23, the center angle between circumferential insides 321a of radial inner ends of teeth bases 321, to which coils 33 are attached, of teeth 32 at both ends in the circumferential direction of the magnetic pole corresponding number of teeth 32 arranged side by side in the circumferential direction.SELECTED DRAWING: Figure 3
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Inventors:
OKUMURA MASANORI
Application Number:
JP2022094453A
Publication Date:
December 21, 2023
Filing Date:
June 10, 2022
Export Citation:
Assignee:
NIDEC CORP
International Classes:
H02K1/22; H02K21/14
Attorney, Agent or Firm:
Patent Attorney Corporation Sano Patent Office
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