Patent ID: 11949306
Assignee: HARBINGER MOTORS INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 19:
20. A fractional-slot-winding motor having a primary axis, the fractional-slot-winding motor comprising:
a stator, comprising a coil-interconnection side, a bus-bar side, a plurality of stator slots, and a plurality of fluid-passage slots, wherein:
the plurality of stator slots extends through the stator parallel to the primary axis between the coil-interconnection side and the bus-bar side such that stator slots in the plurality of stator slots are circumferentially offset from each other,
the plurality of fluid-passage slots extends through the stator between the coil-interconnection side and the bus-bar side such that fluid-passage slots in the plurality of fluid-passage slots are circumferentially offset from each other, and
the plurality of fluid-passage slots is configured to provide a fluid flow between the coil-interconnection side and the bus-bar side;

a bus-bar assembly, comprising a first bus bar, a second bus bar, and a third bus bar, adjacent to the bus-bar side of the stator; and
a plurality of coil units, each extending through the stator, wherein:
each of the plurality of coil units is electrically coupled to at least one other of the plurality of coil units at the coil-interconnection side,
a first one of the plurality of coil units is electrically coupled to the first bus bar,
a second one of the plurality of coil units is electrically coupled to the second bus bar,
a third one of the plurality of coil units is electrically coupled to the third bus bar,
the plurality of coil units comprises dual-leg coil units and single-leg coil units,
the dual-leg coil units are only connected at the coil-interconnection side of the stator,
the single-leg coil units are connected at both the coil-interconnection side and the bus-bar side of the stator,
the dual-leg coil units comprise a first-type-dual-leg coil unit comprising a turn portion, a first leg terminating with a first end, and a second leg terminating with a second end,
the turn portion, the first leg, and the second leg of the first-type-dual-leg coil unit collectively form a continuous monolithic structure,
the first leg of the first-type-dual-leg coil unit protrudes through a first first-type-dual-leg-coil slot of the plurality of stator slots,
the second leg protrudes through a second first-type-dual-leg-coil slot of the plurality of stator slots,
the first first-type-dual-leg-coil slot and the second first-type-dual-leg-coil slot are offset by 4 slots,
(a) a portion of the first leg of the first-type-dual-leg coil unit protruding through the stator and (b) a portion of the second leg of the first-type-dual-leg coil unit protruding through the stator have different radial offsets from the primary axis,
the first end of the first leg of the first-type-dual-leg coil unit extends from the coil-interconnection side and is radially offset closer to the primary axis than the portion of the first leg of the first-type-dual-leg coil unit protruding through the stator, and
the second end of the second leg of the first-type-dual-leg coil unit extends from the coil-interconnection side and is radially offset closer to the primary axis than the portion of the second leg of the first-type-dual-leg coil unit protruding through the stator.