ELECTROMAGNETIC ROTARY MACHINERY

原文（中国語）

A bearingless motor as an electromagnetic rotary machinery includes a rotor and a stator disposed with a gap therebetween, and generates a bearing force that causes the rotor to levitate without contact, by an electromagnetic force or a magnetic force. A stator core includes a back yoke and a plurality of teeth. The teeth each include a tooth body and a tooth tip that is flange shaped. The rotor includes a rotor core and a plurality of permanent magnets. Permeance, which is an amount representing the ease of flowing of magnetic flux, of at least one of the gap and iron cores in a magnetic circuit that goes around the stator and the rotor along a radial direction and a circumferential direction decreases in one direction from one end side to another end side in an axial direction.