| 摘要 |
PROBLEM TO BE SOLVED: To control a power source for a plurality of sets of DC motors using a single set of controller, even without using a sample and hold circuit in each power source. SOLUTION: Each output of a multiplexer circuit 8, provided between a switching power source 3 for driving a plurality of DC motors and one set of microcomputer 1 and a control input of each switching power source 3, are connected via an integrating capacitor C. A control signal for setting output voltage is output from the microcomputer 1 to each power unit 3, by switching the multiplexer circuit 8. Here, by setting amplitude of a pulse train of the output control signal and duty ratio so as to generate a prescribed control voltage by each switching power unit 3, the power unit 3 for a plurality of sets of the DC motors can e controlled using a single set of the microcomputer 1, even without having to use a sample and hold circuit. |
