Motion Control Brush Motors

DC (Direct Current) Motors are the most common type of Brush Motors. Performance wise the windings on the rotor add inertia which lowers the peak acceleration rate. Also the brushes need replacing from time to time and the commutation method limits the top speed as the current begins to arc over the segments. Commutation is the method used to direct currents to the correct motor phases to achieve the best torque. In this case it is achieved by the brushes and contacts on the armature. Dissipation of heat from the windings occurs across the air gap and through the stator resulting in DC motors being less thermally efficient and larger than brushless motors. However, DC motors do cost less than brushless motors and have simpler controls.