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:
Jun. 23, 2015
Filed:
Feb. 13, 2013
Applicant:
Hitachi, Ltd., Tokyo, JP;
Inventors:
Shuichi Tachihara, Hitachinaka, JP;
Tetsuo Kojima, Hitachinaka, JP;
Toyoki Asada, Hitachinaka, JP;
Yongqiang Xia, Mito, JP;
Assignee:
HITACHI, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P 21/00 (2006.01); H02P 3/18 (2006.01); H02P 27/06 (2006.01);
U.S. Cl.
CPC ...
H02P 3/18 (2013.01); H02P 27/06 (2013.01);
Abstract
In order to cause the residual magnetic flux in an induction motor to decay in a short time without an excessive current flow, an induction motor control apparatus continues an operation in which an inverter apparatus is caused to output a zero voltage to the induction motor for a predetermined time before deactivating an operation of the inverter apparatus.