Varnish application system for electric motor
AssigneeFord Global Technologies, LLC
InventorXiaogang Zhang
Life of this patent
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Abstract
A varnish injection system for an electric motor includes a pair of varnish injection assemblies and a biasing device. Each varnish injection assembly includes an injector arm and a varnish injector nozzle attached to the injector arm and operable to provide a varnish to a gap defined between the stator core and one or more wires among the plurality of wires. The biasing device connects the pair of varnish injection assemblies and is configured to exert a compressive force urging the pair of varnish injection assemblies toward each other.
Claims20
A varnish injection system for an electric motor having a stator core and a plurality of wires arranged in and connected to the stator core, the system comprising:
- a pair of varnish injection assemblies, wherein each varnish injection assembly comprises:
- an injector arm, and
- a varnish injector nozzle attached to the injector arm and operable to provide a varnish to a gap defined between the stator core and one or more wires among the plurality of wires;
- and
- a biasing device connecting the pair of varnish injection assemblies and configured to exert a compressive force urging the pair of varnish injection assemblies toward each other.
A stator for an electric motor, the stator comprising:
- a stator core defining a slot;
- a wire disposed in the slot;
- and
- an insulating layer disposed in the slot between the stator core and the wire, the insulating layer comprising:
- a rectangular portion adjacent to the stator core;
- and
- a pair of trapezoidal intermediate portions extending away from the rectangular portion, wherein the pair of trapezoidal intermediate portions extend out from the slot with the wire, and wherein the pair of trapezoidal intermediate portions are in fluid communication with the slot such that the trapezoidal intermediate portions direct varnish into the slot by capillary action.
A motor assembly comprising:
- a stator of an electric motor, the stator comprising:
- a stator core defining a slot;
- a wire disposed in the slot;
- and
- an insulating layer disposed between the stator core and the wire, the insulating layer comprising:
- a rectangular portion adjacent to the stator core;
- and
- a pair of trapezoidal intermediate portions extending away from the rectangular portion, wherein the trapezoidal intermediate portions extend out from the slot with the wire,
- wherein the stator core and the insulating layer define a first gap therebetween and the wire and the insulating layer define a second gap therebetween;
- and
- a varnish injection system comprising:
- a pair of varnish injection assemblies disposed on opposing sides of the stator core, wherein each varnish injection assembly comprises:
- an injector arm,
- a varnish injector nozzle attached to the injector arm and operable to provide a varnish to one of the first gap and the second gap, and
- a varnish supply fluidly connected to the varnish injector nozzle, and
- a biasing device connecting the pair of varnish injection assemblies and configured to exert a compressive force urging the pair of varnish injection assemblies toward each other.
Dependencies are inferred from the claim text.