The realization of electromechanical rotating electrical energy transformation. Usually the motor, generator, synchronous fliers adjust the camera rotation motor. It consists of a static part (called the stator) and a rotating part (called the rotor) is composed. Between the stator and rotor have a very small gap, called the air gap, to ensure that the rotor can rotate freely. In the motor stator and rotor are magnetic in the core, the magnetic field lines to provide a low reluctance magnetic circuit. In addition, there are still winding the stator and rotor, when one through the current, the magnetic field can generate mechanical force in order to achieve electromechanical energy conversion.
Rotating rotor bearings at both ends to be supported for general use. More widely used in small and medium motor oil bearings or ball bearings. They are often installed in the motor end cap. More use of large motor bearings mounted in a special seat of the sliding bearing. In the vertical motor, the rotor needs to use the thrust bearing to bearing. Bearings require constant lubrication; in low-speed motor bearing oil groove in there, set in the axis of oil through the oil into the bearing ring in; high-speed motors often use pressure lubrication. Friction loss in bearings larger occasions, oil storage tanks are often set in a water pipe can be cooled with water to prevent the oil temperature is too high and bearing overheating.
More general use within the rotating motor rotor structure. Outside the stator, rotor installed in the stator, rotor extending through the outer bearing in the motor connection with other machines, mechanical power transmission. This structure installation, use more convenient. In some special occasions, there is also an outer rotor structure, that is fixed in the stator inside the stator and rotor set out. Both within the rotor structure, or external rotor structure, the motor works the same.