Axial gap type electric motor for water pump (ewp)

Abstract

Provided is an axial gap type electric motor for a water pump (EWP) employing a rare-earth-free magnet in a rotor. The axial gap type electric motor for a water pump (EWP) includes a rotor rotatably supported on a fluid flow passage between a pump cover and a body case, a stator arranged in a lower space formed by the body case and an upper cover, and generating a rotating magnetic field to rotatably drive the rotor, and a waterproof partition wall arranged on top of the body case to separate the rotor from the stator, wherein a stator core of the stator has a front end portion which is embedded into the waterproof partition wall so that the front end portion is exposed to the fluid flow passage, and a waterproof coating film made of a thinner film than the waterproof partition wall is formed at the front end portion of the stator core exposed to the fluid flow passage.

Dependencies are inferred from the claim text.