Patent ID: 9112401
Filing Date: 2015-08-18
Classification: H02K

Abstract:
1. A coreless permanent magnet motor, comprising a stator and a rotor rotatably mounted to the stator, wherein one of the stator and the rotor comprises at least one homogeneous surface charged magnet disc made of a permanent magnet material, the other one of the stator and the rotor comprises at least one coreless winding disc, the surface charged magnet disc and the coreless winding disc being axially spaced, the magnetic field at least partly generated by the surface charged magnet disc forming a closed loop by passing through the winding disc and returning back via the surface charged magnet disc, wherein the surface charged magnet disc has a pair of opposite major surfaces and is surface charged across one of the major surfaces to form at least a pair of opposite magnetic poles on said one of the major surfaces, the magnetic field entering into said one of the major surfaces from a south pole of said at least a pair of opposite magnetic poles, passing said one of the major surfaces in a direction from the south pole of said at least a pair of opposite magnetic poles to a north pole of said at least a pair of opposite magnetic poles, and exiting said one of the major surfaces from the north pole of said at least a pair of opposite magnetic poles.