What is the difference between a DC motor
and an AC motor?
1. First, DC motors use DC power as the power source, but AC motors use AC power as the power source.
2. In terms of structure, the principle of a DC motor is relatively simple, but the structure is complex, which is not easy to maintain; while the principle of an AC motor is complex, but the structure is relatively simple, and it is easier to maintain than a DC motor.
3. The DC motor introduces current into the rotor armature through brushes and commutators, so that the rotor is forced to rotate in the stator magnetic field. The AC motor (using a common AC asynchronous motor as an example) passes AC power into the stator windings, which generates a rotating magnetic field in the stator and rotor air gap, and the rotating magnetic field generates an induced current in the rotor windings, which in turn makes the rotor in the stator magnetic field. Forced to rotate.
4. DC motor speed regulation is simple, but the use occasions are limited. AC motor speed regulation is relatively complicated, but it is widely used due to the use of AC power.