Title:
CONTROL SYSTEM OF DC MOTOR
Document Type and Number:
Japanese Patent JPS6035989
Kind Code:
A
Abstract:
PURPOSE:To suppress the irregular rotation of a DC motor at the constantly rotating time by lengthening the pulse width modulation synchronization at the constantly rotating time as compared with that at the rising time. CONSTITUTION:A CPU3 inputs an output from an encoder 1 through a rotating direction detecting waveform forming circuit 3, calculates the detected result of speed and rotating direction, outputs a control amount to a programmable counter 4, and applies a trigger to the counter 4. As a result, the counter 4 outputs a pulse of the pulse width proportional to the control amount to a motor driver 5. The driver 5 supplies a current to a DC motor 1 during a time proportional to the pulse width in accordance with the rotating direction. Then, the CPU3 controls to shorten a trigger interval at the rising time and to lengthen at the constantly rotating time. Thus, the irregular rotation at the constantly rotating time can be suppressed to low value.
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Inventors:
ITOU NORIFUMI
Application Number:
JP14440583A
Publication Date:
February 23, 1985
Filing Date:
August 09, 1983
Export Citation:
Assignee:
RICOH KK
International Classes:
H02P1/18; H02P7/29; (IPC1-7): H02P5/17
Attorney, Agent or Firm:
Kenjiro Take