Patent · US Active

Energy supply for a blade adjustment device pertaining to a wind energy installation

US8405237B2 · kind B2 · utility

4Cited by

20References

16Claims

0Family size

Assignee

R E power Systems AG · DE

Inventors

Karsten Warfen · Söhren, DE
Heinz-Hermann Letas · Rosenfeld, DE

Key dates

Filing date	Feb 23, 2007
Grant date	Mar 26, 2013
Priority date	—
Expiry date	Jun 6, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E10/76
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A wind energy installation includes a tower provided with rotor blades that are adjusted using a servomotor connected to a pitch circuit and an emergency circuit. During normal operation the rotor blades are actuated by the pitch circuit and during emergency operation are actuated by the emergency circuit. The emergency circuit has an electric energy store, a switching device, connection lines to the servomotor and a protection device which includes comprises a power flow detector module (60) designed for determining whether electric power flows into or from the servomotor and a discharge module designed to limit the voltage and/or current in the emergency circuit in the case of a power flow from the servomotor.

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