Rotor of rotary electric machine and method of manufacturing the rotor
AssigneeDenso Corporation
InventorsMasami Niimi, Tsutomu Shiga, Masanori Ohmi
Life of this patent
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Abstract
In a rotor of a rotary electric machine, a rotor core is formed by helically winding a material sheet. The material sheet forms teeth on a first side of a middle connecting portion and projections projecting from a second side of the connecting portion in a direction opposite to the teeth. The material sheet is one of a pair of material sheets formed in a single base sheet in a form of belt. In the base sheet, the material sheets are arranged such that the projections are intermeshed with each other. The material sheet is helically wound such that the projections are located at an inner diameter side of the rotor core.
Claims10
A rotor for a rotary electric machine, comprising:
- a rotor core constructed of a helically wound material sheet, wherein the material sheet is in a form of substantially belt and has a plurality of teeth extending from a first side of its middle portion and a plurality of projections projecting from a second side of the middle portion in a direction opposite to the teeth, the projections define recesses therebetween,
- each projection and each recess have substantially the same dimension with respect to a centerline between a first line passing through tops of the projections and a second line passing through bottoms of the recesses, and
- the material sheet is helically wound such that the projections are located at an inner diameter side of the rotor core,
- wherein a dimension (H) of the teeth and a dimension (T) of the connecting portion and the projections with respect to a direction perpendicular to the longitudinal direction of the material sheet satisfy a relation 2×H≦T.
Dependencies are inferred from the claim text.