Patent ID: 11901779
Assignee: MITSUBA CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A motor comprising:
a stator which comprises an annular stator core, and a plurality of teeth protruding radially inward from an inner circumferential surface of the stator core;
coils which are wound around the teeth;
a shaft which rotates inside the stator core in a radial direction thereof;
a rotor core which is affixed to the shaft and radially centered on a rotation axis of the shaft;
a plurality of permanent magnets disposed on an outer peripheral surface of the rotor core; and
projecting poles which are formed to project radially outward between the permanent magnets adjacent to each other in a circumferential direction of the outer peripheral surface of the rotor core and with which circumferential side surfaces of the permanent magnets are brought into contact,
wherein the stator is formed by stacking a plurality of steel sheets in a direction of the rotation axis of the shaft, and
at least one end portion of both ends of each permanent magnet projects further outward in the direction of the rotation axis than an end portion of the rotor core in the direction of the rotation axis such that the at least one end portion protrudes away from the rotor core in the direction of the rotation axis.