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US 6,191,508 B1Granted
Stator insulation structure of rotary electric machine
AssigneeDenso Corporation
InventorsTakashi Aoki, Shinichi Matsubara, Mitsuru Kato, Kazuhide Sato
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Abstract
In an insulation structure of a rotary electric machine, a stator winding has connection portions covered with reliable insulation resin coating. The modulus of elasticity of the insulation resin is less than a value which may not cause the insulation resin coating to peel off. The modulus of elasticity changes with the thickness of the insulation resin coating.
Claims12
An insulation structure of a rotary electric machine including a stator winding having connection portions covered with insulation resin coating, wherein
- the modulus of elasticity of said insulation resin coating is set to be less than a maximum value which can absorb a force which acts between said insulation resin coating and said connection portions and by which said insulation resin coating is peeled off from said connection portions, and
- said maximum value changes according to the thickness of said insulation resin coating.
A stator of a vehicle AC generator comprising:
- a stator core having a plurality of slots,
- a stator winding having a plurality of conductor segments which are disposed in said plurality of slots and are connected with one another at ends thereof to form connection portions, and,
- insulation resin coating covering said connection portions, said insulation resin coating being formed on an oxide film formed on the surface of said connection portions, wherein
- modulus of elasticity, thickness and coefficient of linear expansion of said insulation resin coating are set so that the shearing force acting between said insulation resin coating and said oxide film becomes less than a strength of said oxide film.
1 more element
Dependencies are inferred from the claim text.