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:
Sep. 15, 1987
Filed:
Jan. 13, 1986
Donal E Baker, American Township, Allen County, OH (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
An electromechanical constant speed drive generating system is provided with a mechanical differential having first, second and third rotatable shafts, wherein the speed of the second shaft is equal to the speed of the first shaft multiplied by the first contant plus the speed of the third shaft multiplied by a second constant. The first shaft is coupled to an external engine and is driven at a variable speed ranging between predetermined lower and upper limits. A constant speed generator is connected to the second shaft for producing a constant frequency output. A power converter is electrically connected between the output of the constant speed generator and a variable speed dynamoelectric machine which is coupled to the third shaft, to transfer power between the output of the constant speed generator and the variable speed dynamoelectric machine, thereby controlling the speed of the dynamoelectric machine such that the speed of the second shaft remains substantially constant when the speed of the first shaft varies between the defined upper and lower speeds. The system can also be used to start the engine by operating the constant speed generator as a motor. Thus both start and generate modes of operation are possible.