Ac motor and dc motor

Ac motor and dc motor DC Motor (DC Motor) in the speed for the benefits of relatively simple, only control the size of the voltage has control of speed, but this kind of Motor is unfavorable in operating conditions such as high temperature, flammable, www.dongfeng-motor.com and due to the need to carbon brush Motor (am) as current converter components (brush Motor), so need to regular cleaning brush friction generated by dirt. Known as brushless motor without carbon brush motor, relative to the brush, because of less carbon brush and brushless motor shaft friction so more save electricity and quieter. Production difficulty is higher, the price also is higher. AC Motor (AC Motor), on the other hand, works under high temperature, flammable, and need not regular cleaning of carbon brush dirt, but in the speed is more difficult, because the control of AC Motor speed to control the frequency centrifugal pump of the alternating current (or the use of induction Motor, with increased internal resistance decreased under the same the frequency of the alternating current Motor speed), the control of the voltage will only affect the torque of the Motor. General household motor voltage of 110 v and 220 v two kinds, in industrial applications and 380 v 8500w gasoline generator or 440 v type.