| CPC H02K 3/487 (2013.01) [H02K 1/146 (2013.01); H02K 21/16 (2013.01)] | 4 Claims |
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1. An electric motor, comprising:
a rotation shaft;
a rotor fixed to the rotation shaft and rotated integrally with the rotation shaft; and
a stator arranged at an outer side of the rotor, wherein:
the stator includes
a stator core including a cylindrical yoke extending in an axial direction of the rotation shaft and teeth extending from an inner circumferential surface of the yoke toward the rotor, adjacent ones of the teeth in a circumferential direction of the yoke define a slot therebetween,
coils respectively wound around the teeth,
a tooth insulation member arranged between each of the teeth and a corresponding one of the coils, and
a slot insulation member arranged in the slot between adjacent ones of the coils in the circumferential direction;
the slot insulation member is a wedge-shaped spacer that presses the adjacent ones of the coils, between which the slot insulation member is arranged, against corresponding ones of the teeth around which the adjacent ones of the coils are wound;
the slot insulation member includes
a main body shaped to gradually narrow from the rotor toward the yoke, and
projections arranged in the slot and projecting from the main body toward the adjacent ones of the coils between which the main body is arranged; and
the adjacent ones of the coils each include
a main coil portion arranged in the slot and sandwiched between a corresponding one of the projections and a corresponding one of the teeth,
a coil end arranged outside the slot and contacting the main body, the coil end being wider than the main coil portion, and
a bent coil portion connecting the main coil portion and the coil end.
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