Patent · US Active

Helical winding with more uniform field utilization

US10819177B2 · kind B2 · utility

0Cited by

2References

14Claims

0Family size

Assignee

ROLLS-ROYCE DEUTSCHLAND LTD & CO KG · DE

Inventors

Michael Frank · Erlangen, DE
Jörn Grundmann · Großenseebach, DE
Wolfgang Nick · Nürnberg, DE
Mercedes Herranz Gracia · Forchheim, DE

Key dates

Filing date	Oct 9, 2017
Grant date	Oct 27, 2020
Priority date	—
Expiry date	Dec 9, 2037

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E40/60
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Various embodiments include a stator for an AC electric machine with a number of magnetic poles comprising: a central axis; and a stator winding with a plurality of conductor turns. The individual conductor turns are grouped into a total of n electrical strands. The individual conductor turns of a respective electrical strand define a first conductor branch and a second conductor branch. The first conductor branch and the second conductor branch are arranged helically around the central axis over at least half of their respective lengths. The helically arranged conductor branches each have a pitch greater than a product of an axial length of the helical conductor branches and the number of magnetic poles.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.