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:
Feb. 24, 2015
Filed:
Mar. 14, 2012
Applicants:
Yuki Horie, Hitachinaka, JP;
Shinji Watanabe, Hitachinaka, JP;
Yasushi Nakano, Hitachinaka, JP;
Yukihiro Shima, Hitachinaka, JP;
Inventors:
Yuki Horie, Hitachinaka, JP;
Shinji Watanabe, Hitachinaka, JP;
Yasushi Nakano, Hitachinaka, JP;
Yukihiro Shima, Hitachinaka, JP;
Assignee:
Hitachi Koki Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H 7/122 (2006.01); H02P 23/00 (2006.01); H02M 1/32 (2007.01); H02M 7/5387 (2007.01); H02K 7/14 (2006.01); H02M 7/44 (2006.01);
U.S. Cl.
CPC ...
H02P 23/00 (2013.01); H02M 1/32 (2013.01); H02M 7/53871 (2013.01); H02K 7/145 (2013.01); H02M 7/44 (2013.01);
Abstract
An inverter device includes: an inverter circuit configured to perform ON/OFF operations with a preset duty cycle to convert a DC power into an AC power and output the AC power to an AC motor; and a controller configured to change a duty cycle of the ON/OFF operations.