Thin brushless motor having resin-insulated concentric ring-shaped bus bars

A centralized power distribution unit for a vehicular thin brushless motor, wherein said centralized power distribution unit is formed into a ring configuration and can concentratedly distribute current to stator windings of the motor, the centralized power distribution unit comprising:

• a plurality of bus bars, each having a terminal portion to be connected to a power source and one or more tabs to be respectively connected to one or more of the stator windings, the bus bars bent in a thickness direction to be formed into a substantially annular shape, each of the bus bars provided correspondingly with a phase of the motor;
• a resin insulation layer that covers the bus bars;
• and
• an insulating holder having a plurality of holding grooves that hold the bus bars, the holding grooves formed in parallel extending along a circumferential direction of the centralized power distribution unit;
• wherein
• the bus bars are respectively inserted into the holding grooves and are thus stacked in a radial direction of the centralized power distribution unit, the bus bars separated from one another by a predetermined gap;
• and
• the insulating holder and the bus bars are covered by the resin insulation layer.