How does the brush motor control the positive and backward rotation?
Usually have a brush motor circuit with dc power supply, as long as change the brush across the electrodes at the ends of the power supply, change the direction of the input current, can change the motor and reversing.
First, you should know that a brush motor, the principle of the motor as long as the change of the input voltage polarity can change the steering motor, moreover by changing the polarity of the magnetic field can also change the steering motor, can change the direction of the field current can be solved, hope to help you
With the dc motor and ac motor, dc motor can change the polarity of the input power supply and change the rotation direction of the motor. The ac motor can change the rotation direction of the machine by adjusting the two wires of the carbon brush.
