PERMANENT MAGNET MOTOR

摘要

A permanent magnet (PM) motor includes a stator defining an inner stator opening. The inner stator opening extends along a stator axis. The PM motor further includes a rotor disposed inside the stator. The stator includes a plurality of lamination segments stacked together along the stator axis. Each lamination segment includes an annular stator body and teeth extending from the annular stator body toward the stator axis. The teeth are spaced apart from one another so as to define a plurality of slots arranged annularly about the stator axis. The stator defines slot openings arranged annularly about the stator axis. At least one of the lamination segments is rotationally offset relative to another lamination segments so that at least one of the slot openings is circumferentially offset from another slot openings in the other lamination segment.

主权项

1. A permanent magnet (PM) motor, comprising:
a stator defining an inner stator opening, the inner stator opening extending along a stator axis in an axial direction; a rotor disposed inside the stator, wherein the rotor is rotatable about the stator axis relative to the stator; and wherein the stator includes:
a plurality of lamination segments stacked together along the stator axis, each of the lamination segments including:
an annular stator body;a plurality of teeth extending from the annular stator body toward the stator axis, wherein the plurality of teeth are spaced apart from one another so as to define a plurality of slots arranged annularly about the stator axis, each of the slots is defined between two of the teeth, the stator defining a plurality of slot openings arranged annularly about the stator axis, each of the slot openings is in communication with one of the slots so as to define a slot/opening combination, and each of the slot openings extends along an opening longitudinal axis in the axial direction;wherein each of the slots extends along a slot central axis, each slot central axis extends through a center of one of the slots in a radial direction, each of the slot openings extends along an opening central axis in the radial direction, each opening central axis extends through a center of one of the slot openings along the radial direction;wherein, in at least one slot/opening combination, and the slot central axis of one of the slots is circumferentially offset from the opening central axis of one of the slot openings in the slot/opening combination by a circumferential opening offset distance; and wherein a first lamination segment of the plurality of lamination segments is rotationally offset relative to a second lamination segment of the plurality of lamination segments so that the opening longitudinal axis of at least one of the slot openings in the first lamination segment is circumferentially offset from the opening longitudinal axis of at least one of the slot openings in the second lamination segment by a circumferential offset distance.