| 摘要 |
PURPOSE:To reduce the torque ripple of a DC motor by applying the reversely induced voltage of the motor to high and low pass filters and controlling the current of the motor according the arithmetic output of the outputs of both the filters and the speed reference voltage. CONSTITUTION:An OP amplifier 14 outputs a deviation between the speed reference voltage from a variable resistor 15 and the reversely induced voltage of a DC motor 1 through a low pass filter composed of a resistor 10 and a capacitor 11. A multiplier 15 multiplies the reversely induced voltage of the motor 1 through the high pass filter 6 by the output of the amplifier 14, and produces a control signal through a voltage/current converter 9 to a transistor 16. In this manner, the torque ripple can be reduced. |
