Permanent Magnet Motor, Refrigeration Compressor and Air Conditioning Unit

摘要

A stator and a rotor are mounted inside a case of the permanent magnet motor, and separate the inner cavity of the case into a first inner cavity and a second inner cavity. Axial ventilation holes in communication with the first inner cavity and with the second inner cavity, are disposed in teeth of a stator core of the stator, and each axial ventilation hole is a taper hole extending in a height direction of each tooth. The width of one end of the axial ventilation hole, which is close to a head of the tooth, is greater than the width of the other end of the axial ventilation hole, which is close to a root of the tooth. The taper holes enable fluid to fully carry out exchange heat at the teeth where heat is generated most intensively.

主权项

1. A permanent magnet motor, comprising a case, a stator and a rotor; the stator and the rotor are installed in the case, and separate an inner cavity of the case into a first inner cavity and a second inner cavity; the stator comprises a stator core, axial ventilation holes in communication with the first inner cavity and with the second inner cavity are disposed in teeth of the stator core; wherein, each axial ventilation hole is a taper hole extending in a height direction of each tooth; width of one end of the axial ventilation hole, which is close to a head of the tooth, is greater than width of the other end of the axial ventilation hole, which is close to a root of the tooth.