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:
Apr. 10, 2012
Filed:
Feb. 19, 2009
Akira Kikuchi, Hitachi, JP;
Keizo Shimada, Hitachi, JP;
Kichio Nakajima, Kasumigaura, JP;
Toshikazu Minoshima, Kasumigaura, JP;
Tomohiko Yasuda, Kashiwa, JP;
Takashi Ikimi, Hitachi, JP;
Akira Kikuchi, Hitachi, JP;
Keizo Shimada, Hitachi, JP;
Kichio Nakajima, Kasumigaura, JP;
Toshikazu Minoshima, Kasumigaura, JP;
Tomohiko Yasuda, Kashiwa, JP;
Takashi Ikimi, Hitachi, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
An electric drive vehicle having a power generator coupled to an engine, a first power converter connected with the power generator for converting the AC power generated by the power generator to DC power, a second power converter connected with the first power converter, for converting the DC power to AC power, a power consuming device for consuming the DC power, connected to a DC circuit between the first and second power converters, an electric motor connected with the second power converter, and at least one wheel driven by the electric motor, wherein the vehicle has a first control mode for controlling the output of the electric motor and a second control mode for controlling the power consumed by the power consuming device, and the second control mode performs such control that the operations of the second power converter and the electric motor in the first control mode are simulated.