BLDC motor (DC Motor) benefits in the speed control is relatively simple terms, the size of the control voltage only has control of speed, but the motor should not be in such high temperature, flammable and other operating environments, and because of the need to brush motor As a current converter (Commutator) components (brush motor), so they need regular cleaning of the friction generated by carbon brushes dirt. The brushless motor as compared to a brush, brushless motor because less carbon brush and shaft friction so more energy is relatively quiet. Made more difficult, the price is higher. bldc motor controller (AC Motor) can at high temperature, flammable and other operating environments, and do not regularly clean up the brush of the dirt, but in the more difficult to control speed, because speed control bldc motor controller must control the frequency of alternating current (or use of induction motors, with the increase in internal resistance in a manner that the same lower frequency AC motor speed), control the voltage will only affect the motor torque. General civil motor voltage 110V and 220V and other two, in industrial applications as well such as 380V or 440V type.