Electric motor with end winding support

摘要

An electric motor includes a stator, a case surrounding the stator, and a rotor rotatably disposed with respect to the stator. The rotor includes a rotor core having a plurality of poles and slots, a shaft coupled to a central portion of the rotor core, a rotor coil wound on the rotor core, and coil supporting members provided at the rotor core. The coil supporting members are configured to support the rotor coil such that the rotor coil is prevented from being separated from the rotor core in a radial direction when the rotor rotates. Under such a configuration, a short-circuit of the rotor coil due to a centrifugal force when the rotor rotates, can be prevented.

主权项

1. An electric motor, comprising:
a stator; a case surrounding the stator; and a rotor rotatably disposed with respect to the stator, wherein the rotor includes:
a rotor core having a plurality of poles and slots;a shaft coupled to a central portion of the rotor core;a rotor coil wound on the rotor core; andcoil supporting members provided at the rotor core, to support the rotor coil such that the rotor coil is prevented from being separated from the rotor core in a radial direction when the rotor rotates,wherein each of the coil supporting members comprises:
a hub coupled to the shaft;a plurality of spokes extending from the hub in a radial direction; andsupporting portions protruding from ends of the spokes in an axial direction, to support coil ends of the rotor coil,wherein each pole of the rotor core is provided with a pole shoe extending in a circumferential direction,wherein the pole shoe of the rotor core has a thickness smaller than that of the supporting portion in a radial direction, andwherein a spacer having a thickness corresponding to the difference between the two thicknesses of the supporting portion and the pole shoe, is provided at an inner side of the pole shoe of the rotor core.