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. 15, 2011
Filed:
Jan. 25, 2008
Applicants:
Naoshi Sugawara, Hitachi, JP;
Tetsuhiro Fujimoto, Hitachi, JP;
Yasuhiro Kiyofuji, Hitachi, JP;
Keizo Shimada, Hitachi, JP;
Akira Kikuchi, Hitachi, JP;
Kazuhiro Imaie, Hitachi, JP;
Inventors:
Naoshi Sugawara, Hitachi, JP;
Tetsuhiro Fujimoto, Hitachi, JP;
Yasuhiro Kiyofuji, Hitachi, JP;
Keizo Shimada, Hitachi, JP;
Akira Kikuchi, Hitachi, JP;
Kazuhiro Imaie, Hitachi, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H02P 3/00 (2006.01); H02P 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An electric motor control system including a generator, an AC motor, a power converter for driving the AC motor using a DC output voltage of the generator, and an electric motor controller for controlling the power converter. The electric motor controller controls the power converter by predicting a change in the DC voltage.