Stator assembly and method of assembling stator assembly

A stator assembly, comprising:

• a stator core including a back yoke having an annular shape and a plurality of teeth that extend from the back yoke toward a central axis of the annular shape;
• an insulator that sandwiches the stator core;
• and
• a plurality of coil conductors wound around a portion of the insulator that covers the plurality of teeth, respectively,
• wherein the plurality of teeth include a plurality teeth having a U-phase, a plurality teeth having a V-phase, and a plurality of teeth having a W-phase, which are alternately arranged in order along the annular shape,
• wherein the plurality of coil conductors in each phase each have a first end configured as a terminal wiring conductor and a second end configured as a neutral-point connection conductor, and the terminal wiring conductor and the neutral-point connection conductor are connected by tooth conductors wound around respective teeth and a bridging line conductor that bridges the tooth conductors wound around the teeth,
• wherein the terminal wiring conductor is connected to a first tooth conductor of the plurality of teeth at an upper side of the insulator, and
• wherein the bridging line conductor is disposed on the upper side of the insulator disposed on the stator core and is disposed along an outer side of a tooth of a different phase.

A method for assembling a stator assembly that includes a stator core having a back yoke disposed in an annular shape and a plurality of teeth extending from the back yoke toward a central axis of the annular shape, an insulator sandwiching the stator core from a top and a bottom thereof, and a coil conductor wound around a portion of the insulator that covers the plurality of teeth, the method comprising:

• configuring the plurality of teeth with N teeth from a first tooth to an N-th tooth for each of a U-phase, a V-phase, and a W-phase, and arranging the teeth of each phase repeatedly in order along the annular shape, where N is a natural number;
• connecting a terminal wiring conductor and a neutral-point connection conductor, in which the terminal wiring conductor and the neutral-point connection conductor each are configured as a first end and a second end of the coil conductor of each of the U-phase, the V-phase, and the W-phase, by tooth conductors wound around teeth among the N teeth and a bridging line conductor that bridges the tooth conductors wound around the teeth;
• connecting the terminal wiring conductor to a first tooth conductor among the N teeth at an upper side of the insulator;
• disposing the bridging line conductor on an upper side of the insulator disposed on the stator core, and along an outer side portion of a tooth of a different phase;
• and
• connecting the neutral-point connection conductor to an N-th tooth conductor among the N teeth at a lower side of the insulator.