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:
Apr. 20, 2004
Filed:
Dec. 05, 2001
Toshiki Tanaka, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
In a numerical control system of the invention, a motor drive power converter comprises input current determination means for comparing an input current found by input current detection means with an allowable current value with respect to less-than, equal-to, or greater-than relation, and acceleration/deceleration command change signal output means for outputting a control signal to a drive unit based on the determination result of the input current determination means . If the input current determination means determines that input current Ii> allowable current value I , acceleration/deceleration command generation means of the drive unit changes an acceleration/deceleration command (lessens the inclination of a speed command), thereby lowering the input current Ii.