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. 19, 1997
Filed:
Jun. 01, 1995
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An electric power steering system is disclosed which includes an electric motor adapted to supply steering assist directly to the steering system to thereby reduce the steering torque to be exerted to the system by a driver. The steering system includes a phase compensative device which is formed of a phase delay circuit, or the phase delay circuit and a low-pass filter connected in series thereto, and is positioned in a loop connecting a motor current detector in the steering system and a drive controller in a control block, so that high-frequency components may be removed from motor current signals in the feedback loop. As a result, it is possible to suppress lag of the phases of the signals and hence to prevent parasitic oscillations, leading to the steering system being capable of providing steering assist most suited to particular steering operations and comfortable steering feel to a driver.