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. 16, 2010
Filed:
Aug. 09, 2007
Hidekazu Moriki, Hitachinaka, JP;
Shinya Imura, Toride, JP;
Norikazu Matsuzaki, Mito, JP;
Kohei Itoh, Hitachiota, JP;
Masaru Ito, Hitachinaka, JP;
Hidekazu Moriki, Hitachinaka, JP;
Shinya Imura, Toride, JP;
Norikazu Matsuzaki, Mito, JP;
Kohei Itoh, Hitachiota, JP;
Masaru Ito, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a control apparatus for a vehicle having an electric motor for driving the wheels of the vehicle, an electric power source for energizing the electric motor, a motor torque target value calculation unit for controlling the electric power source, and a field current target value calculation unit, the motor field current is momentarily decreased when the difference between the actual motor armature current and the motor armature current target value exceeds a predetermined value or when the wheels are deemed to slip, and the motor field current is increased as the actual armature current of the motor substantially follows the motor armature current target value.