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:
Apr. 19, 2011
Filed:
Sep. 29, 2009
Xiaoming Yuan, Wuhan, CN;
Zhuohui Tan, Shanghai, CN;
Robert William Delmerico, Clifton Park, NY (US);
Haiqing Weng, Shanghai, CN;
Robert Allen Seymour, Roanoke, VA (US);
Xiaoming Yuan, Wuhan, CN;
Zhuohui Tan, Shanghai, CN;
Robert William Delmerico, Clifton Park, NY (US);
Haiqing Weng, Shanghai, CN;
Robert Allen Seymour, Roanoke, VA (US);
General Electric Company, Niskayuna, NY (US);
Abstract
A phase-locked loop circuit comprises a phase error detector for receiving a multi-phase reference signal and a synchronized phase signal of the phase-locked-loop circuit, and for performing a rotational transformation to convert the multi-phase reference signal into two-phase quantities at a synchronous rotation d-q reference frame. A monotonic transfer module receives the two-phase quantities, and generates a monotonic phase error signal which is monotonic when a phase difference between the multi-phase reference signal and the synchronized phase signal ranges from −180 degrees to 180 degrees. A regulator receives the monotonic phase error signal, and generates a synchronized rotation frequency. An integrator receives the synchronized rotation frequency, and generates the synchronized phase signal.