Who knows the main difference between DC motor and AC motor, I hope to say a little more simple, thank you
DC characteristic:(1) good speed control performance. The so-called "speed performance" refers to the motor in a certain load conditions, according to the needs of artificially change the speed of the motor. The DC motor can achieve uniform and smooth stepless speed regulation under heavy load condition, and the speed range is wide. (two) starting torque is large. The speed regulation can be realized uniformly and economically. Therefore, all the machines which start or require uniform speed regulation under heavy load, such as large reversible rolling mills, winches, electric locomotives, trams, etc., are all driven by DC motors and motors.Communication characteristics:The AC motor has higher working efficiency, no smoke and dust, no pollution to the environment and little noise. Because of its series of advantages, it is widely used in industry and agriculture, transportation, national defence, commerce and home appliance, medical equipment and so on.
DC motor speed control is simple, but the use of limited occasions. AC motor speed control is relatively complicated, but it is widely used due to the use of AC power supply.
The direct current motor introduces the current into the rotor armature through the brush and commutator, so that the rotor is forced in the stator magnetic field to rotate. AC motor (AC asynchronous motor to commonly used as an example) is the alternating current into the stator winding, resulting in a rotating magnetic field in stator and rotor air gap, rotating magnetic field induced current in the rotor winding, the rotor stress in the stator magnetic field generated in the rotation.
As the name suggests, the direct current motor uses DC as the power supply. AC motors use alternating current as power source.Structurally, the principle of the direct current motor is relatively simple, but the structure is complex, and it is not easy to maintain. The principle of AC motor is complex, but the structure is relatively simple, and it is easier to maintain than the direct current motor.
