The DC motor for K mechanism uses a ring-shaped permanent magnet, and the current generates an Amperage through the coil on the rotor. When the coil on the rotor is parallel to the magnetic field, the direction of the magnetic field that continues to be transferred will change, so the power at the end of the rotor at this time The brush is in alternating contact with the converter, so that the direction of the current on the coil also changes, and the direction of the Lorentz force generated does not change, so the motor can maintain one direction of rotation.
The working principle of the DC motor for the K mechanism is to change the alternating electromotive force induced in the armature coil by the commutation function of the commutator and the brush to change the DC electromotive force when it is taken out from the brush end. The direction of the induced electromotive force is determined by the right hand rule.
The direction of the force of the conductor is determined by the left-hand rule. This pair of electromagnetic forces forms a moment acting on the armature. This torque is called electromagnetic torque in the rotating machine. The direction of the torque is counterclockwise, in an attempt to make the armature. Turn counterclockwise. If this electromagnetic torque can overcome the resistive torque on the armature, the armature can be rotated counterclockwise.