The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 2012
Filed:
Jun. 30, 2010
Thomas Edenfeld, Osnabrück, DE;
Thomas Edenfeld, Osnabrück, DE;
General Electric Company, Schenectady, NY (US);
Abstract
The disclosure concerns a method for operating a wind turbine having an electrical system, the electrical system comprises a permanent magnet generator having a rotor and a stator, and a power electronic device electrically connected to the permanent magnet generator, wherein the power electronic device and a circuit breaker are electrically disposed in series between the permanent magnet generator and a grid, wherein the permanent magnet generator has permanent magnets and a generator winding into which a voltage is induced by the permanent magnets when the rotor is rotating, the method comprising: generating a signal for tripping the circuit breaker based on a field modification that is modifying the field of the permanent magnets of the permanent magnet generator. Further, the disclosure concerns a method for determining the temperature of at least one permanent magnet of a permanent magnet machine and a controller for a wind turbine.