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. 18, 1995
Filed:
Jul. 07, 1993
Yoshikazu Tanaka, Kawasaki, JP;
Fuji Electric Co., Ltd., Kawasaki, JP;
Abstract
In a synchronous operation system, rotating positions of two rotating elements MSP and SSP driven by induction motors IM.sub.1 and IM.sub.2 are maintained in a predetermined positional relation, what is called, a synchronous control by a position adjuster 7. A gain compensating circuit 10 for adjusting an output of the position adjuster 7 by using a detected speed of one rotation element SSP as a parameter is provided, and the gain compensating circuit 10 adjusts the output of the position adjuster 7. Thus, a slippage of the induction motor is compensated in a speed region where the position variation of the two rotating elements becomes excessively large, or in a high speed region (constant output region) exceeding a basic rotation speed in case the synchronous control is carried out by using an induction motor and an invertor for controlling a primary frequency of the induction motor.