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:
May. 01, 2018
Filed:
Jun. 08, 2016
Applicant:
Hitachi, Ltd., Chiyoda-ku, Tokyo, JP;
Inventors:
Koichiro Adachi, Tokyo, JP;
Hajime Urai, Tokyo, JP;
Katsuhiko Shiraishi, Tokyo, JP;
Masataka Sasaki, Tokyo, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01H 33/59 (2006.01); H01H 33/36 (2006.01); H01H 11/00 (2006.01); H01H 3/26 (2006.01);
U.S. Cl.
CPC ...
H01H 33/593 (2013.01); H01H 33/36 (2013.01); H01H 11/0062 (2013.01); H01H 2003/268 (2013.01);
Abstract
A method for controlling a power switching apparatus to solve problems including: setting a target time reaching a predetermined position immediately before a target phase by a time calculator during an opening and closing operation of a movable arc contact with respect to a fixed arc contact in a target phase at a predetermined average switching speed; and controlling an electric motor at a speed equal to or less than an average switching speed immediately before the target phase from an operation start time to the target time by a motor controller.