Difference between DC motor and AC motor

Release time:

2014-07-28

Compared with DC motors, AC motors can operate under high temperature and flammable conditions

The motor is divided into DC motor and AC motor according to the different power source. Most of the motors in the power system are AC motors, which can be synchronous motors or asynchronous motors (the stator speed of the motor does not keep synchronous with the rotor rotation speed).

DC Motor (DC Motor) is relatively simple in terms of speed control, as long as the control voltage can control the total speed. However, such motors should not operate under high temperature and flammable conditions. Moreover, since the motor needs a carbon brush as a current transformer (Commutator) parts (brush motor), so the need for regular cleaning brush friction generated by dirt. Brushless motor called brushless motor, compared to brush, brushless motor brushless because of less friction with the shaft, so more power and more quiet. However, the production of higher difficulty, the price is higher. The company is located in:

Compared with DC motors, AC motors can operate under high temperature and flammable conditions, and do not need to regularly clean the carbon brush. However, it is difficult to control the speed because the AC motor speed needs to be controlled The frequency of the AC (or the induction motor, which increases the internal resistance, reduces the motor speed at the same AC frequency) and controlling its voltage only affects the torque of the motor. General civilian motor voltage 110V and 220V are two kinds of industrial applications, there are 380V, 440V and other types.

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