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. 29, 2015
Filed:
Dec. 27, 2012
Jtekt Corporation, Osaka-shi, JP;
Hiroki Kagawa, Kashiba, JP;
JTEKT CORPORATION, Osaka-shi, JP;
Abstract
A control signal output unit obtains a motor control signal by applying a reduction amount for a current command value obtained by an over-power suppression control unit to a current command value from a host control unit. The over-power suppression control unit includes a hydraulic pressure estimation unit that estimates hydraulic pressure, and a current command value correction amount calculation unit that compares a target hydraulic pressure with an estimated hydraulic pressure and outputs the reduction amount for the current command value. Load information indicating whether a load on the pump is a low load or a high load that is higher than the low load is input into a control circuit from the host control unit, and the over-power suppression control unit changes the target hydraulic pressure in accordance with a magnitude of the load indicated by the load information.