The structure of dc motor should be composed of stator and rotor.The stationary part of the DC motor is called the stator. The main function of the stator is to generate a magnetic field, which is composed of the frame, main magnetic pole, commutator pole, end cover, bearing and brush device.The rotating part of the rotor, whose main role is to generate electromagnetic torque and induction electromotive force, is the hub of energy conversion for DC motor, so it is usually called the armature, by the shaft, armature core, armature winding, commutator and fan, etc.
A dc generator is a machine that converts mechanical energy into direct current energy.It is mainly used as dc motor, electrolysis, electroplating, electrosmelting, charging and ac generator excitation power.Although direct current is needed in the place, also USES the power rectification element, converts the alternating current to the direct current, but looks from the certain performance aspect, the alternating current rectification power source still cannot replace the direct current generator completely.
