| 摘要 |
PROBLEM TO BE SOLVED: To provide a pulse-width modulation control device which can be kept high in accuracy, even if it uses simple processing that has no effect on a main control when a feedback current is calculated by directly carrying out an A/D conversion, so as not to have a load current flowing through an electromagnetic actuator as an object of control delayed by the effect of a time constant. SOLUTION: A pulse-width modulation control device is equipped with a feedback current calculation means, which converts the load current of an electromagnetic solenoid 41 digitally and outputs the digitally converted load current as a feedback current into the CPU of a 4WD control unit 1. The feedback current calculation means stores as a middle digital value the digitally converted value of a load current detected, at the middle of the width of each pulse of the ON and OFF signals of PWM signals and carries out average value calculation processing, in which the average value of the middle digital values serves as the feedback current value.
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