Patent · US Active

Rotary transformer

US7911307B2 · kind B2 · utility

1Cited by

5References

20Claims

0Family size

Assignee

ABB RESEARCH LTD. · CH

Inventors

Jochen Mast · Heidelberg, DE
Jean Schutz · Heidelberg, DE
Jens Helfrich · Speyer, DE
Guntram Scheible · Hirschberg, DE
Colin Luthardt · Enköping, SE

Key dates

Filing date	Nov 2, 2004
Grant date	Mar 22, 2011
Priority date	—
Expiry date	Nov 24, 2027

Classification

Technology area (CPC H)Electricity
CPC primaryH01F38/18
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention relates to a variable transformer comprising at least one primary winding and at least one secondary winding which can be rotated in relation thereto. The primary winding and the secondary winding are subdivided into at least two winding sections. The winding sections interlock in a comb-like manner and the flow of current of directly opposite winding sections is directed in the respective opposite direction.

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