The working principle of the DC generator is the principle of changing the alternating electromotive force induced in the armature coil by the commutator and the commutation function of the brush to make it become a DC electromotive force when it is drawn from the brush end.
The direction of the induced electromotive force is determined by the rule of the right hand (the magnetic induction line points to the palm of the hand, the thumb points to the direction of the conductor movement, and the other four fingers point to the direction of the induced electromotive force in the conductor).
Working principle
The direction of the conductor force is determined by the left-hand rule. This pair of electromagnetic force forms a torque that acts on the armature. This torque is called electromagnetic torque in the rotating electrical machine. The direction of the torque is counterclockwise, attempting to rotate the armature counterclockwise. If this electromagnetic torque can overcome the resistance torque on the armature (such as resistance torque caused by friction and other load torque), the armature can rotate in a counterclockwise direction.
DC motors are motors that rely on DC operating voltage and are widely used in recorders, VCRs, DVD players, electric shavers, hair dryers, electronic watches, toys, etc.
