Benefits DC Motor (DC Motor) is relatively simple in terms of speed control, only the size of the control voltage has a total speed can be controlled, but the motor is not operating at such a high temperature, flammable environment, and because the motor brushes need to as a current transformer (Commutator) components (brush motor), so they need regular cleaning of the brushes dirt friction generated. The brushless motors called brushless motor, relative to the brush, brushless motor brushes because the less friction with the shaft and therefore more energy is relatively quiet. Higher difficulty level, the price is higher. AC motor (AC Motor) can be at high temperatures, flammable operating environment, and do regular cleaning brushes the dirt, but in the speed control is more difficult, because the need to control AC motor speed control AC frequency (or use induction motor, by way of increasing the internal resistance, at the same frequency of alternating current to reduce motor speed), the control voltage will only affect the motor torque. General civilian motor voltage 110V and 220V of two other industrial applications as well, such as 380V or 440V patterns.