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Helical winding with more uniform field utilization

A helical, winding phase technology, applied in the direction of winding, superconductor element usage, winding conductor shape/style/structure, etc., can solve the problem of low utilization rate of helical stator winding field

Active Publication Date: 2021-08-17
ROLLS ROYCE DEUT LTD & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the described helical stator winding has the disadvantage that the field utilization is less than that of a conventional electric machine with a straight, substantially axially extending stator winding
Especially in the axial end region, the field utilization of conventional helical stator windings is particularly low

Method used

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  • Helical winding with more uniform field utilization
  • Helical winding with more uniform field utilization
  • Helical winding with more uniform field utilization

Examples

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Effect test

Embodiment Construction

[0060] exist figure 1 In , an electric machine 1 according to a first embodiment of the invention is shown in a schematic longitudinal section. The motor 1 includes a rotor 7 and a stator 3 . The rotor 7 is mounted rotatably about an axis of rotation A by means of a rotor shaft 9 . For this purpose, the rotor shaft 9 is supported relative to the machine housing 11 via bearings 10 . A longitudinal section along the axis of rotation A (which is at the same time the central machine axis) is shown. The electrical machine can in principle be a motor or a generator, or even a machine that can operate in both modes.

[0061] The stator 3 has a stator winding 4 with a plurality of conductor turns 13j. In the axially inner subregion 1 of the stator 3 , which here forms the main part of the axial length, the conductor turns 13j are formed helically. That is, the individual conductor turns 13j extend obliquely with respect to the main axis and are each arranged on a cylindrical circ...

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PUM

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Abstract

The invention relates to a stator (3) for an alternating current motor (1) having a number of poles p, -wherein the stator (3) has a central axis A, -wherein the stator (3) has a number of conductor turns (13j ), where the individual conductor turns (13j) are grouped into a total of n electrical winding phases (u, v, w), where the conductor turns (13j) of one winding phase each have at least one A first conductor branch (23a) and at least one second conductor branch (23b), - wherein said conductor branches (23a, 23b) are arranged helically around a central axis (A) over a major part (1) of their length ), - wherein the helically arranged conductor branches (23a, 23b) each have a pitch h greater than the product of the axial length l of the helical conductor branch (13j) and the number of poles p. Furthermore, the invention relates to an electric machine (1) having such a stator (3).

Description

technical field [0001] The invention relates to a stator for an alternating current machine having a number of poles p, wherein the stator has a stator winding with a plurality of conductor turns which each run helically at least in partial sections. Furthermore, the invention relates to an electric machine with such a stator. Background technique [0002] Stator windings are known in which the conductor turns are arranged helically about the central axis of the stator. Such windings are known as helical windings or inclined windings. The use of such a winding type is advantageous in particular for achieving a particularly high power density of electric machines, as is required, for example, for applications in drives for vehicles. Just as it is being used in aircraft, achieving a high power density is a priority development goal. Particularly advantageously, with regard to the high power density, a helical stator winding is used in conjunction with a superconducting roto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K55/00H02K3/04H02K3/47
CPCH02K55/00H02K3/47H02K2213/03H02K3/28Y02E40/60H02K11/33B64D27/24H02K55/04
Inventor M.弗兰克J.格伦德曼M.赫兰兹格拉西亚W.尼克
Owner ROLLS ROYCE DEUT LTD & CO KG