An electrically powered compressor motor, an electrically powered compressor comprising the same, and a method of making a motor for an electrically powered compressor

摘要

A motor for an electrically driven compressor is provided which has bridge portions which connect the teeth of an inner core to one another and in which a cogging torque and a torque ripple are greatly reduced. A stator 21 is formed by an inner core 26 having a winding 23 in which front ends of adjacent teeth 27 are continuous with each other, and an outer core 28 which is connected to the outside of the inner core and forms a magnetic path. The inner core has bridge portions 29 connecting the leading ends of adjacent teeth to each other, and an outer peripheral shape of the bridge portions is formed on a circular arc A1. The rotor 24 includes a gap widening portion 24A at which a gap between it and an inner peripheral surface of the stator widens from a center point to a position between the magnetic poles.