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:
Nov. 10, 1998
Filed:
Sep. 04, 1996
Koyo Seiko Co., Ltd., Osaka, JP;
Abstract
An electric power steering apparatus comprising a broken-line function circuit for outputting a predetermined analog broken-line function signal on the basis of a torque detection signal, a gain circuit for giving a predetermined gain to the broken-line function signal, a polarity inverting circuit for inverting the polarity of the broken-line function signal, a first attenuating means for attenuating the torque detection signal at a predetermined rate, a second attenuating means for attenuating an output signal of said polarity inverting circuit at a predetermined rate, an addition circuit for adding a signal from the first attenuating, a signal from the second attenuating means and an output signal of the gain circuit, and outputting the addition value as a target value of a motor current, and a differential amplifying circuit for calculating a difference between the target value and the motor current detected by a detecting circuit for the purpose of feedback control, wherein a steering force assisting motor is driven on the basis of an output signal from the differential amplifying circuit.