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. 03, 1994
Filed:
Oct. 20, 1992
Satoru Kaneko, Hitachi, JP;
Ryoso Masaki, Hitachi, JP;
Sanshiro Obara, Ibaraki, JP;
Tsutomu Ohmae, Hitachi, JP;
Yuusuke Takamoto, Hitachi, JP;
Hirohisa Yamamura, Hitachiota, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An electric vehicle control device is disclosed, which includes an AC motor for driving a vehicle; a main electric power conversion unit for supplying an AC voltage to the AC motor; a battery for supplying a DC voltage to the main electric power conversion unit; an auxiliary electric power conversion unit connected to the battery and adapted to be connected to a load or a power supply; a controller for controlling the main and auxiliary electric power conversion units so as to act selectively as an inverter or a converter; and a switching unit for giving selectively the AC motor the AC voltage from the main and auxiliary electric power conversion units under control of the controller. In the running mode of the electric vehicle, the controller described above makes the main electric power conversion unit act as an inverter and controls the switching unit so that the AC voltage from the main electric power conversion unit is given to the AC motor. Further, responding to detection of a failure of the main electric power conversion unit, the controller makes the auxiliary electric power conversion unit act as an inverter and controls the switching unit so that the AC voltage from the auxiliary electric power conversion unit is given to the AC motor.