Patent · US Expired

Fractional turns transformers with ferrite polymer core

US7915991B2 · kind B2 · utility

15Cited by

7References

21Claims

0Family size

Assignee

KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

Eberhard Waffenschmidt · Aachen, DE
Thomas Durbaum · Baiersdorf, DE

Key dates

Filing date	Aug 24, 2004
Grant date	Mar 29, 2011
Priority date	—
Expiry date	Mar 4, 2025

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49073
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Conventional transformers with fractional turns have pre-manufactured cores usually with a complicated structure. According to the present invention, a method is provided of manufacturing a planar transformer where a ferrite polymer compound is laminated to a PCB for forming the core of the transformer. Advantageously, this may allow for the provision of a cheap and robust transformer.

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