Title:
CURRENT CONTROL CIRCUIT FOR SERVO CONTROLLER
Document Type and Number:
Japanese Patent JPH0522992
Kind Code:
A
Abstract:
PURPOSE: To stably and smoothly control to drive a servo motor by maintaining a responding speed of a servo motor drive to a current command constant even if a DC voltage of a main circuit is varied.
CONSTITUTION: The current control circuit comprises an A/D converter 8 for detecting a value of a DC voltage between main circuits P and N to convert it to a digital value, and a CPU 9 for calculating a ratio of a DC voltage value between the circuits P and N at the time of stopping a servo motor 10 to the digital value, and further multiplying the ratio by a current amplifier gain to output it to a current amplifier.
Inventors:
SATO KAZUO
Application Number:
JP17264991A
Publication Date:
January 29, 1993
Filing Date:
July 12, 1991
Export Citation:
Assignee:
YASKAWA ELECTRIC CORP
International Classes:
H02M7/48; H02P27/06; (IPC1-7): H02M7/48; H02P7/63
Attorney, Agent or Firm:
Wakabayashi Tadashi
Next Patent: SYNC SWITCHING CONTROL SYSTEM FOR INVERTER