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:
Mar. 01, 1988
Filed:
Dec. 05, 1986
Donal E Baker, American Township, Allen County, OH (US);
Mirza A Beg, Lima, OH (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
A parallel power system includes at least two DC link variable speed constant frequency power sources each having a plurality of output phases connected to a common bus. The total real error current flowing in the output phases of each of the power sources is monitored and the relative phase angle of the Thevenin voltage of the power sources is controlled in response to the monitored total real error current to reduce the magnitude of this real error current. The reactive error current flowing in at least one of the output phases of each of the power sources is monitored and the relative magnitude of the Thevenin voltage of the power sources is controlled in response to the monitored reactive error current to reduce the magnitude of the reactive error current. For operation at no load, the phase angle control loop is sensitive to both real and reactive error currents.