STATOR FOR AN ELECTRIC MACHINE
First Claim
1. Stator for an electric machine which comprises:
- a stator core having a first and a second face opposite to each other and a circular array of stator slots extended between said faces and distributed around a stator; and
a bar winding comprising a plurality of basic conductors and a plurality of special conductors which are interconnected to form the bar winding;
wherein the basic conductors each comprise two basic conductor legs and a basic conductor connecting portion between said legs, each leg of basic conductor having an end portion connected to the basic conductor connector portion and an opposite free end portion;
wherein the basic conductors are inserted into the stator slots with free end portions projecting from said second face, the free end portions defining a plurality of circular conductor layers concentric to one another comprising a circular layer of radially outer ends and a circular layer of radially inner ends, andwherein the special conductors include a jumper of a first type having a first and a second leg of jumpers connected respectively to two of said free end portions, and one jumper connection portion between said legs of jumpers, the jumper joining portion being extended radially with respect to said radially outer end layer, or radially inner with respect to said radially inner end layer, to pass around at least one of the free end portions respectively of the radially outer end layer or the radially inner end layer, and,wherein the jumper of said first type is arranged in such a way that;
the two free end portions to which the first and the second jumper leg are connected belong respectively to two of said conductor layers, each distinct;
at least one of the first and second legs of jumpers extends in a respective passage defined in said conductor layers to connect to the respective free end portion; and
wherein said conductor layers include a first set of free end portions bent circumferentially at a first pitch and a second set of free end portions bent circumferentially at a second pitch, different from the first pitch, and wherein at least one of said conductor layers comprises a group of free end portions bent at said first pitch which are arranged in succession and circumferentially adjacent to one another;
the jumper of said first type going around said group of free end portions, and said free end portions to which the first and the second leg of jumpers are connected, being bent at said second pitch.
2 Assignments
0 Petitions
Accused Products
Abstract
A stator for an electric machine includes a stator core having a first and a second face and a circular row of stator slots extended between said faces and which are distributed around a stator axis; and, a winding bar comprising a plurality of basic conductors and a plurality of special conductors interconnected with one another to form the bar winding. The basic conductors each comprise two basic conductor legs and a connecting portion of basic conductor between said legs. The basic conductors are inserted into the stator slots with the free end portions protruding from said second face. The special conductors comprise a jumper of a first type having a first and a second leg of jumpers connected respectively to two of said free end portions, and one jumper connection portion between said legs of jumpers.
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Citations
9 Claims
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1. Stator for an electric machine which comprises:
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a stator core having a first and a second face opposite to each other and a circular array of stator slots extended between said faces and distributed around a stator; and a bar winding comprising a plurality of basic conductors and a plurality of special conductors which are interconnected to form the bar winding; wherein the basic conductors each comprise two basic conductor legs and a basic conductor connecting portion between said legs, each leg of basic conductor having an end portion connected to the basic conductor connector portion and an opposite free end portion; wherein the basic conductors are inserted into the stator slots with free end portions projecting from said second face, the free end portions defining a plurality of circular conductor layers concentric to one another comprising a circular layer of radially outer ends and a circular layer of radially inner ends, and wherein the special conductors include a jumper of a first type having a first and a second leg of jumpers connected respectively to two of said free end portions, and one jumper connection portion between said legs of jumpers, the jumper joining portion being extended radially with respect to said radially outer end layer, or radially inner with respect to said radially inner end layer, to pass around at least one of the free end portions respectively of the radially outer end layer or the radially inner end layer, and, wherein the jumper of said first type is arranged in such a way that; the two free end portions to which the first and the second jumper leg are connected belong respectively to two of said conductor layers, each distinct; at least one of the first and second legs of jumpers extends in a respective passage defined in said conductor layers to connect to the respective free end portion; and wherein said conductor layers include a first set of free end portions bent circumferentially at a first pitch and a second set of free end portions bent circumferentially at a second pitch, different from the first pitch, and wherein at least one of said conductor layers comprises a group of free end portions bent at said first pitch which are arranged in succession and circumferentially adjacent to one another;
the jumper of said first type going around said group of free end portions, and said free end portions to which the first and the second leg of jumpers are connected, being bent at said second pitch. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9)
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4. (canceled)
Specification