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:
Nov. 11, 2014
Filed:
Jul. 27, 2012
Applicants:
Shu Yu Cao, Singapore, SG;
Bing LI, Singapore, SG;
Anshuman Tripathi, Singapore, SG;
Lars Helle, Suldrup, DK;
Inventors:
Shu Yu Cao, Singapore, SG;
Bing Li, Singapore, SG;
Anshuman Tripathi, Singapore, SG;
Lars Helle, Suldrup, DK;
Assignee:
Vestas Wind Systems A/S, Aarhus N., DK;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 6/22 (2006.01);
U.S. Cl.
CPC ...
Abstract
A position sensorless control methodology for electrical machines using high frequency flux vector signal injection in the estimated rotor flux rotational reference frame is provided. In one aspect, the estimated position error function is derived directly from the stator flux equation without any simplification. The method is applicable for electrical generator motoring mode operation from standstill and power generation mode operation.