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:
Jul. 02, 2002
Filed:
Nov. 24, 1999
Applicant:
Inventors:
Warren Elliott Buckles, Madison, WI (US);
Douglas C. Folts, Baraboo, WI (US);
Assignee:
American Superconductor Corporation, Westborough, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 7/155 ;
U.S. Cl.
CPC ...
H02M 7/155 ;
Abstract
A transfer of power between an energy storage device and a load is controlled by obtaining a DC voltage from the energy storage device, and controlling a phase angle of AC power delivered to the load to keep the DC voltage substantially constant. The phase angle of the AC power is controlled by controlling a current component of the AC power.