Title:
DC MOTOR DRIVING DEVICE
Document Type and Number:
Japanese Patent JPS5826585
Kind Code:
A
Abstract:
PURPOSE:To facilitate and accelerate reverse driving by a method wherein the switching elements and current control elements connecting to a DC motor are respectively controlled by pulse width and armature current corresponding to the difference between armature current and motor control voltage. CONSTITUTION:When the control voltage Vc is in normal polarity, the normal revolution driving pulse V7 corresponding to normal revolution indicating voltage V8 and control voltage Vc is output making transistors A1 and B1 conductive while if the control voltage Vc is turned to inverse polarity in said status, the inverse revolution indicating voltage V6 and the inverse revolution driving pulse V5 are output making transistors A2 and B2 conductive. At this time, the voltage V17 of resistor R2 being boosted, the conductivity of transistor B2 is reduced by means of the control circuit 2 and the pulse width of said inverse revolution driving pulse V5 output from the pulse width control circuit 3 is decided by the difference between said voltage V17 and said control voltage Vc.
Inventors:
HARUHARA IZURU
Application Number:
JP12271981A
Publication Date:
February 17, 1983
Filing Date:
August 05, 1981
Export Citation:
Assignee:
RICOH KK
International Classes:
H02P7/288; H02P7/00; (IPC1-7): H02P7/28
Attorney, Agent or Firm:
Nobuoki Sugi