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. 30, 1985
Filed:
Dec. 27, 1983
Applicant:
Inventors:
Sadayuki Igarashi, Funabashi, JP;
Hiroshi Nagase, Hitachi, JP;
Hisakazu Ninomiya, Funabashi, JP;
Sumio Kobayashi, Funabashi, JP;
Hiroyuki Tomita, Funabashi, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Hitachi Keiyo Engineering Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318807 ; 318798 ;
Abstract
A control apparatus for an induction motor wherein an inverter is connected between a power source and the induction motor so as to energize the induction motor through the inverter, characterized in that when an input voltage of the inverter has lowered, a magnetizing current component command is decreased, while a torque current component command is increased.