Why is dc motor less efficient than ac motor
Dc motor speed regulation is simple, but use case is limited. Ac motor speed regulation is relatively complicated, but it is widely used because of ac power supply.
It is. Ac motor is complex but relatively simple, and is easier to maintain than dc motor. The dc motor introduces the current to the rotor armature through the brush and the commutator, so that the rotor can force the force in the stator field. Ac motor (commonly used ac asynchronous motor, for example) is to put the ac electric flux into the stator winding, thus in the rotor creates a rotating magnetic field in air gap, rotating magnetic field in the rotor winding induced current, which make the rotor spinning force produced in the stator magnetic field.
As the name suggests, dc motors use direct current as a power source. Ac motor is used as an ac power supply. According to the structure, the principle of dc motor is relatively simple, but the structure is complex and not easy to maintain.
