| 摘要 |
PROBLEM TO BE SOLVED: To restrict a current in a motor control device in which a PWM control is performed by effectively detecting an overcurrent.SOLUTION: A motor control device comprises: a current supply circuit (110) that is controlled by a PWM signal and supplies a current to a motor; an overcurrent detection circuit (170) that outputs a signal indicating whether or not it is in an overcurrent state on the basis of the current flowing in the current supply circuit; a filter circuit (160) that outputs a signal inputted from the overcurrent detection circuit by delaying for a predetermined filter period; a variable resistance circuit (130) that is connected into a path of the current flowing in the current supply circuit; and a resistance control circuit (150) that increases the resistance of the variable resistance circuit on the basis of the signal inputted from the filter circuit and indicating the overcurrent state.SELECTED DRAWING: Figure 1 |
