Patent ID: 9748810
Date: 2017-08-29
CPC Classifications: H02K,Y10T

Claim:
1. A motor comprising a rotor having a plurality of magnetic poles around a rotary shaft, and a stator having a winding wound on a stator core formed of serially coupled twelve core pieces, each of which includes a tooth, the motor for being driven by a three-phase alternating-current power supply, wherein: the stator core is formed by deforming a core assembly having the core pieces coupled in a strip form into an annular shape, and by joining both ends of the core assembly together to make a core-fastening portion; the winding comprises a first phase winding, a second phase winding and a third phase winding corresponding to respective phases; each of the phase windings includes a winding portion wound on a designated number of the core pieces to form a plurality of coils, and a lead portion led out from the winding portion, and is routed from one end of the core assembly toward another end; a pair of adjoining two of the coils is assigned as one coil pair of same phase, and individual coil pairs are arranged in order of the phases; the lead portion of the first phase winding is led out from a first coil pair at one side closest to the another end of the core assembly; the lead portion of the second phase winding is led out from a second coil pair adjacent to the first coil pair; the stator comprises terminal pins, each having a hook; the lead portions of the first phase winding and the second phase winding make up respective wire terminals; a first terminal pin is disposed in place on the first coil pair, and the wire terminal of the lead portion of the first phase winding is connected to the first terminal pin; a second terminal pin is disposed in place on the second coil pair, and the wire terminal of the lead portion of the second phase winding is connected to the second terminal pin; the lead portion of the third phase winding is extended through a plural number of the core pieces in a direction of the other two lead portions, and is formed into an extended wire terminal; and the extended wire terminal and the wire terminals of the other two lead portions are electrically connected by engaging the extended wire terminal in the hooks of both the first and second terminal pins to provide a neutral point of three-phase Y-connection circuit.