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. 05, 1983
Filed:
Apr. 21, 1981
Applicant:
Inventor:
Hidehiko Sugimoto, Nagoya, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318805 ; 318729 ; 318812 ;
Abstract
A control circuit 3 for an induction motor 2 detects the voltage applied across the motor winding and the current flowing therethrough. The supply power and the feedback power are determined from the detected voltage and current and are supplied to a computing unit whose output controls a voltage regulator such that the voltage applied across the motor winding results in a fixed, predetermined ratio between the effective and apparent powers to maximize the motor efficiency and to minimize the motor's power consumption regardless of variations in the line voltage and fluctuations in the motor load.