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:
Aug. 22, 2006
Filed:
May. 31, 2005
Tomohiro Sakurai, Tokyo, JP;
Tomohiro Sakurai, Tokyo, JP;
Fuji Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A control apparatus of an electric vehicle in which relays are switched to a disconnecting state without causing failure of the electric vehicle. Main relays RyRyswitchable between a connecting state and a disconnecting state are provided between a drive motorfor driving driven wheels and a motor drive batteryfor supplying current to the drive motorWhen these main relays RyRyare to be switched to the disconnecting state, it is determined whether or not the output current I from the motor drive batteryis below a predetermined current and whether or not the vehicle speed V is below a predetermined speed. When it is determined that the output current I is below the predetermined current and the vehicle speed V is below the predetermined speed, the main relays RyRyare switched to their disconnecting states. By this means it is possible to prevent welding failure of the main relays RyRyand to protect an invertorand high-voltage auxiliariesfrom an induced voltage of the drive motor