The energized coil is forced to rotate in a magnetic field.

That is to say, the electrified coil will produce magnetism, repel the original magnetic field, and thus effectively make it rotate.

The direction of the forced movement of the electrified wire in the magnetic field is the same as

electric current

Direction sum

Magnetic flux lines/lines of force

Direction (magnetic field direction). The working principle of motor is that the magnetic field is influenced by current.

The action of force

Let the motor rotate. This is a machine that converts electric energy into mechanical energy.

According to the principle of magnetic effect of current, motors can be divided into DC motors and AC motors according to different power sources.

Principle of DC motor

The DC coil can only turn half a turn when it is forced in a magnetic field. For one turn, a commutator is needed to make it turn to the balance position and automatically change the current direction.

Rotor rotation principle of three-phase AC asynchronous motor

When the magnetic pole rotates clockwise, the magnetic force of the magnetic pole cuts the rotor bar and the electromotive force is induced in the bar. The direction of electromotive force is determined by the right-hand rule. Because the motion is relative, if the magnetic pole does not move and the rotor bar rotates counterclockwise, the electromotive force can also be induced in the bar. Under the action of electromotive force, a current is generated in the closed conductor. This current interacts with the magnetic field of the rotating magnetic pole, so that the rotor bar is subjected to electromagnetic force F, and the direction of the electromagnetic force can be determined by the left-handed rule. The electromagnetic force generates electromagnetic torque and the rotor rotates.