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:
Sep. 03, 2013
Filed:
Jan. 26, 2007
Akira Kikuchi, Hitachi, JP;
Takashi Ikimi, Hitachi, JP;
Keizo Shimada, Hitachi, JP;
Naoshi Sugawara, Hitachi, JP;
Akira Kikuchi, Hitachi, JP;
Takashi Ikimi, Hitachi, JP;
Keizo Shimada, Hitachi, JP;
Naoshi Sugawara, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An electric drive vehicle having an induction motor for braking or driving wheels, a motor controller for controlling the induction motor, and mechanical brakes for braking the wheels, wherein while the vehicle is in halt in a state that the mechanical breaks are not operating, the motor controller applies DC voltage or AC voltage in a frequency range of −1 Hz to +1 Hz to the stator of the induction motor to make the induction motor generate torque for stopping the vehicle and maintain the vehicle in a halt state.