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. 24, 2005
Filed:
May. 16, 2003
Tomoaki Teramoto, Wako, JP;
Tomoaki Teramoto, Wako, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
Electric power steering apparatus includes a steering torque detection section for detecting steering torque acting on a steering system, a motor for imparting steering assist torque to the steering system; a voltage raising circuit including a switching element to be driven by a voltage-raise controlling PWM signal; and a motor driving controller for setting a target current to be supplied to the motor on the basis of at least the detected steering torque, setting a motor-current controlling duty factor signal on the basis of the target current, operating a switching circuit on the basis of the duty factor signal to control a motor drive current, and driving the motor with the controlled current. CPU of the motor driving controller generates the PWM signal for controlling the voltage raising circuit.