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Direct current motor

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The working principle of the Direct current motorr （DC motor ）is the alternating electromotive force induced in the armature coil,
By the commutator with the role of brush, which leads from the brush end into the principle of DC electric potential.
Direction of induction electromotive force by the right-hand rule to determine (magnetic induction line point to palm, thumb pointing in the direction of movement of the conductor, the other four fingers pointing is the direction of the induced electromotive force in a conductor).
Working principle
The conductor the direction of force with the left hand dingze sure. This pair of electromagnetic force to form a torque on the armature, the torque in the rotary motor is referred to as the electromagnetic torque, the direction of the torque is counter clockwise, in an attempt to make the armature counter clockwise rotation. If the electromagnetic torque can overcome the resistance torque on the armature (for example, the resistance torque caused by friction and other load torque), the armature can rotate in a counter clockwise direction.
DC motor is rely on the operation of DC voltage of the motor, widely used in included machines, video recorders, DVD machine, electric shavers, hair dryer, electronic watches, toys and so on.