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Rotary electrical machine provided with a stator

a technology of stators and electrical machines, applied in the direction of dynamo-electric machines, applying/manufacturing slot closures, magnetic circuit shapes/forms/construction, etc., can solve the problems of occupying more space in the notch, winding is not well compacted, and the stress on the wires is not good, so as to reduce the stress on the wires

Inactive Publication Date: 2017-05-11
VALEO EQUIP ELECTRIC MOTEUR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention describes a method for quickly and easily forming closure elements in electrical machines without damaging the wires or affecting the machine's performance. The closure elements can be formed on either a stator without tooth roots or on a stator already provided with tooth roots. The method includes a step of offsetting adjacent metal sheets in the direction of the notch to create a tooth root. Overall, this method allows for the efficient and effective closure of notch openings in electrical machines.

Problems solved by technology

In these machines two problems in particular arise on the winding 5 of the stator body 4.
Firstly, the winding is not well compacted, and occupies more space in the notch than it could occupy if it were compacted.
This is detrimental, since, for a given total length of wire, the addition of copper in the notches makes it possible to increase the performance, and in particular the output of the machine.
Secondly, the winding is not well secured in the notches, and can project from the inner diameter of the stator, which gives rise to a risk of collision with the rotor in rotation.
The solutions proposed according to the prior art do not make it possible to solve this problem satisfactorily.
In this case, the wire, and in particular its insulator, are liable to be damaged during this operation.

Method used

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  • Rotary electrical machine provided with a stator
  • Rotary electrical machine provided with a stator
  • Rotary electrical machine provided with a stator

Examples

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Effect test

embodiment 1

[0097]the tool for the notches 41, 42 and 43 is identical. According to an example of this embodiment, if only one relative rotation of the stator takes place in relation to the tool, there are then the closure elements 451, 452a, 453, 454, 455 and 452b which are situated on the same radial plane. There is then in particular a single closure element 452 formed by the two elements 452a and 452b.

embodiment 2

[0098]the tools for the notches 42 and 43 are different. According to an example of this embodiment, there are then the closure elements 453 and 454 on the one hand, and 455 and 452b on the other hand, which are situated in sets of two, on two different radial planes.

embodiment 3

[0099]the tool for the notches 41 and 43 is identical. According to an example of this embodiment, if there is only one relative rotation of the stator in relation to the tool, there are then the closure elements 451, 452a, 455 and 452b which are situated on the same radial plane, whereas the closure elements 453 and 454 are for example situated on another radial plane. This therefore prevents the aforementioned phenomenon of interference. Also, a single closure element 452 is obtained, formed by the two elements 452a and 452b.

[0100]As already stated for FIGS. 7 and 8, it will be appreciated that N tools 60 could also be provided, distributed axially on the notch 43, which would then give rise to the formation of a maximum of 2 N closure elements distributed axially. There would also be better compacting of the winding part 53 of the notch 43, thanks to the radial supports distributed axially.

[0101]FIG. 10 illustrates N=2 tools for the notches 41 and 43 and N=1 tool for the notch 4...

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Abstract

A stator of a rotary electrical machine has a stator body formed by a stack of metal sheets. The stator body is delimited by inner and outer radial surfaces. Notches in the stator body extend axially. Each notch has a notch base and a notch opening, and the notch opening is on the side of the inner radial surface. A stator winding is supported by the stator body, and the winding has a plurality of winding parts. Each part is accommodated in one of the notches. Each of the notches at the notch opening has a closure element. Each winding par in a notch is retained between the notch base and the closure element. The closure elements are formed by offsetting at least one of the metal sheets of an adjacent notch in the direction of the notch.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS AND CLAIM TO PRIORITY[0001]This application is related to Patent Application No. 1560709 filed Nov. 9, 2015 in France, the disclosure of which is incorporated herein by reference and to which priority is claimed.FIELD OF THE INVENTION[0002]The present invention relates to a rotary electrical machine, and more particularly to the stator of a rotary electrical machine of this type.BACKGROUND OF THE INVENTION[0003]Use of rotary electrical machines in motor vehicles is known. These can consist of a compact polyphase alternator. This alternator transforms mechanical energy into electrical energy, and can be reversible. A reversible alternator of this type is known as an alternator-starter, and in another functioning mode transforms electrical energy into mechanical energy, in particular in order to start the thermal engine of the vehicle.[0004]This machine substantially comprises a housing 1, and, inside the latter, a claw rotor 2 which is integral...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H02K1/16H02K3/487H02K15/00
CPCH02K1/165H02K3/487H02K15/0031H02K2213/03H02K3/48H02K15/0018H02K1/12H02K3/521
Inventor BILTERYST, PIERRE-YVESDELIANNE, HENRIMARGUERITTE, DAVIDJOZEFOWIEZ, ERICPERREAUT, SYLVAINBALTHAZE, PATRICEBATTUT, JULIEN
Owner VALEO EQUIP ELECTRIC MOTEUR
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