DC MOTOR

DC motors are the most common type of motors used in robotics. DC motors appear in a large variety of shapes and sizes. Another way of DC motor characterization is brush type and brushless DC motors. This characterization refers to the manner of commutation used in motor, which converts direct current from the batteries into the alternating current required to generate motor action.

If this commutation is performed mechanically with brushes, the commutator segments at the ends of the rotating rotor col physically slide against the stationary brushes that are connected to the terminals of motor. These type of motors are brush type DC motors. For brushless motors, the DC is converted into AC in the rotor electronically with position sensors and a microprocessor controller, so no brushes are needed.