Ac asynchronous generator principle
Asynchronous generator rotor is higher than the synchronous speed, the stator magnetic field will be of induction coil cutting, voltage and current, if the power grid, the grid frequency control are the synchronous speed. If it is not incorporated into the grid, its synchronous speed will be determined by the combination of the generator's speed and load.
In structure, a generator is identical to an electric motor, which is usually composed of stator, rotor, end cover, and the electric brush. The stator is composed of the machine seat. Stator iron core, wire wrap winding, and other structural parts that are fixed in these parts. The rotor by the rotor iron core, the rotor pole (with magnetic clutches. Pole winding), slip ring, (also known as the copper ring collector ring.), such as fan and shaft parts. Generators and motors is completely reversible, and motor stator with rated voltage of the generator, the rotor will rotate, generator or motor rotor rotation by external force, to achieve synchronization of rated speed, the stator can produce voltage, produces electricity. The working principle of three phase asynchronous motor, three-phase alternating current motor stator winding into the three-phase alternating current, can produce a rotating magnetic field, rotating magnetic field lines is put through the stator core, air gap and the rotor iron Yi constitute a loop. Asynchronous motor rotor winding conductor due to the motion, the relative to the rotating magnetic field is induced electromotive force by cutting lines, and thus will through the rotor winding current. The rotor winding conductor of a current-carrying current is affected by electromagnetic force in the rotating magnetic field. Under the electromagnetic torque of electromagnetic force, the motor rotor moves along the side wind of the rotating field.
Generator up the machine is provided by an external source excitation current, after reaching the rated speed will be separated from the bus part of exciting current, but is 10 kv / 20 kv bus voltage, and then after excitation variable step-down rectifier once again return to the rotor 2.... (sorry, forget the synchronous speed), the magnetic induction of the stator are the induced electromotive force on the rotor line on the stator winding cutting (relative is the conductor in cutting the magnetic induction line) immortality induced current 1 year without touch, if there is a false appreciation to correct, decline the spray son O
