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:
Feb. 17, 2015
Filed:
Jul. 19, 2012
Liang Cao, Shanghai, CN;
LI Cai, Shanghai, CN;
Yan-song LU, Shanghai, CN;
Delta Electronics (Shanghai) Co., Ltd., Shanghai, CN;
Abstract
A device and a method for detecting a crowbar circuit in a wind turbine are provided, wherein the wind turbine comprises a converter electrically connected to the crowbar circuit, and the method comprises: electrically coupling a detection module to the crowbar circuit; inputting a first control signal into the crowbar circuit, to turn on the crowbar circuit; providing a three-phase voltage signal to the crowbar circuit via the converter, wherein voltage signals in any two adjacent phases has a predetermined phase angle difference; reading the first detection signal outputted by the detection module, to determine whether the crowbar circuit is normally thrown into the wind turbine; inputting a second control signal to the crowbar circuit, to turn off the crowbar circuit; and reading again the second detection signal outputted by the detection module, to determine whether the crowbar circuit is normally cut out from the wind turbine.