| 摘要 |
PROBLEM TO BE SOLVED: To provide a current control device for a DC motor which enables a direct control and which has high efficiency and stabilizes a circuit by controlling the state of drive of the DC motor by the quantity of the current supplied to the DC motor. SOLUTION: In order to realize a stable control of a motor system through a direct current control, this device has a current-amplifying means 16 which detects the quantity of the current flowing through the rear end of a DC motor and amplifies a value of this current and an on-off control means 18, which compares a reference current value inputted from the outside with the present current value provided by the current-amplifying means 16 and outputs an on-off control signal based on an increase or decrease of the current. The device is equipped with a microcomputer 11 which controls the on-off times of a chopper transistor, of which the duty value of a pulse waveform of a prescribed frequency generated from itself is regulated by the on-off control signal supplied from the on-off control means 18. |
