What's the difference between a DC motor and an AC motor?
The rotating principle of three phase asynchronous motorThe prerequisite of the three-phase asynchronous motor to rotate is to have a rotating magnetic field, and the stator winding of the three-phase asynchronous motor is used to generate a rotating magnetic field. We know that the voltage between the three-phase power supply phase difference is 120 degrees in phase three, a stator winding of the three-phase induction motor in the spatial direction is 120 degrees, so when in the stator windings in three-phase power, the stator winding will produce a rotating magnetic field of stator winding rotation the magnetic field, the rotor conductor (bar) will cut the revolving magnetic field lines and induced current, current in the rotor and rotating magnetic field interact to produce electromagnetic force, the electromagnetic force generated by the electromagnetic torque drive along the rotor rotating magnetic field direction of rotation. Under normal circumstances, the actual speed of the motor is lower than the rotating speed of the rotating magnetic field. For this reason, we call three-phase motor as asynchronous motor.
Alternating current motors are divided into stator windings and rotor conductors. The rotor conductor is shaped like a silicon steel sheet between a cage and a conductor. Some of the AC motors also have windings
A direct current motor is a magnetic field that does not move; a conductor moves in a magnetic field; an alternating current motor rotates in a magnetic field, and the conductor does not moveDC motor consists of stator winding and rotor winding of stator winding. The magnetic field is produced. When the direct current. The stator windings produce fixed polarity magnetic field. The rotor energizing force in the magnetic field. So the rotor in the magnetic field force is rotating. The DC motor structure is complicated. The cost is high.
