Stator for electric rotating machine
First Claim
1. A stator for an electric rotating machine, the stator comprising:
- a hollow cylindrical stator core having a plurality of slots that are formed in a radially inner surface of the stator core and spaced at predetermined intervals in a circumferential direction of the stator core; and
a stator coil made up of a plurality of wave-shaped electric wires mounted on the stator core, each of the electric wires having a plurality of in-slot portions, each of which is received in one of the slots of the stator core, and a plurality of turn portions each of which is located outside of the slots of the stator core to connect one adjacent pair of the in-slot portions of the electric wire, each of the turn portions including an apex part that is located axially furthest in the turn portion from the stator core,whereinthe stator coil includes a plurality of first crank-shaped portions and a plurality of second crank-shaped portions,each of the first and second crank-shaped portions is provided, in one of the electric wires, at the center of the apex part of one of the turn portions of the electric wire and at least the first crank-shaped portions are radially bent to shift the radial position of the electric wire,any amount of radial position shift made by each of the second crank-shaped portions is less than that made by each of the first crank-shaped portions, andthe second crank-shaped portions are located at a plurality of places in the circumferential direction of the stator core.
1 Assignment
0 Petitions
Accused Products
Abstract
A stator includes a hollow cylindrical stator core and a stator coil made up of wave-shaped electric wires. Each of the electric wires has in-slot portions, which are received in slots of the stator core, and turn portions that are located outside of the slots to connect the in-slot portions. The stator coil includes first crank-shaped portions and second crank-shaped portions. Each of the first and second crank-shaped portions is provided, in one of the electric wires, at the center of an apex part of one of the turn portions and is radially bent to shift the radial position of the electric wire. The amount of radial position shift made by each of the second crank-shaped portions is less than that made by each of the first crank-shaped portions. The second crank-shaped portions are located at a plurality of places in the circumferential direction of the stator core.
10 Citations
14 Claims
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1. A stator for an electric rotating machine, the stator comprising:
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a hollow cylindrical stator core having a plurality of slots that are formed in a radially inner surface of the stator core and spaced at predetermined intervals in a circumferential direction of the stator core; and a stator coil made up of a plurality of wave-shaped electric wires mounted on the stator core, each of the electric wires having a plurality of in-slot portions, each of which is received in one of the slots of the stator core, and a plurality of turn portions each of which is located outside of the slots of the stator core to connect one adjacent pair of the in-slot portions of the electric wire, each of the turn portions including an apex part that is located axially furthest in the turn portion from the stator core, wherein the stator coil includes a plurality of first crank-shaped portions and a plurality of second crank-shaped portions, each of the first and second crank-shaped portions is provided, in one of the electric wires, at the center of the apex part of one of the turn portions of the electric wire and at least the first crank-shaped portions are radially bent to shift the radial position of the electric wire, any amount of radial position shift made by each of the second crank-shaped portions is less than that made by each of the first crank-shaped portions, and the second crank-shaped portions are located at a plurality of places in the circumferential direction of the stator core. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A stator for an electric rotating machine, the stator comprising:
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a hollow cylindrical stator core having a plurality of slots that are formed in a radially inner surface of the stator core and spaced at predetermined intervals in a circumferential direction of the stator core; and a stator coil made up of a plurality of wave-shaped electric wires mounted on the stator core, each of the electric wires having a plurality of in-slot portions, each of which is received in one of the slots of the stator core, and a plurality of turn portions each of which is located outside of the slots of the stator core to connect one adjacent pair of the in-slot portions of the electric wire, each of the turn portions including an apex part that is located axially furthest in the turn portion from the stator core, wherein the stator coil includes a plurality of crank-shaped portions and a plurality of straight portions, each of the crank-shaped portions is provided, in one of the electric wires, at the center of the apex part of one of the turn portions of the electric wire and is radially bent to shift the radial position of the electric wire, each of the straight portions is provided, in one of the electric wires, at the center of the apex part of one of the turn portions of the electric wire and extends in the circumferential direction of the stator core without being radially bent, and the straight portions are located at a plurality of places in the circumferential direction of the stator core. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification