The working principle of the generator

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A generator is a mechanical device that converts other forms of energy into electrical energy. It is driven by a water turbine, steam turbine, diesel engine or other power machinery, and converts the energy generated by water flow, air flow, fuel combustion or nuclear fission into mechanical energy to be transmitted to the generator, Converted into electrical energy by a generator. Generators are widely used in industrial and agricultural production, national defense, science and technology and daily life.

Working principle of diesel generator

The diesel engine drives the generator to turn the energy of the diesel into electrical energy. In the diesel engine cylinder, the clean air filtered by the air filter is fully mixed with the high-pressure atomized diesel sprayed from the fuel injector. Under the upward extrusion of the piston, the volume is reduced and the temperature rises rapidly, reaching the ignition point of diesel. The diesel is ignited, the mixed gas burns violently, and its volume expands rapidly, pushing the piston down, which is called'work'.

Working principle of gasoline generator

The gasoline engine drives the generator to turn the energy of gasoline into electrical energy. In the cylinder of a gasoline engine, the mixed gas burns violently and expands rapidly, pushing the piston down to perform work. Regardless of whether it is a diesel generator or a gasoline generator, each cylinder performs work in a certain sequence. The thrust acting on the piston becomes the force that drives the crankshaft to rotate through the connecting rod, thereby driving the crankshaft to rotate. By installing the brushless synchronous alternator coaxially with the crankshaft of the power machine, the rotor of the generator can be driven by the rotation of the power machine. Using the principle of'electromagnetic induction', the generator will output induced electromotive force, and current can be generated through the closed load circuit. .

Principle of generating three-phase alternating current by alternator

(1) The rotor coil must be energized to generate a magnetic field: power is supplied to the rotor coil through the F and E terminals, and the rotor coil is energized to generate a magnetic field.

(2) The engine works to drive the rotor to rotate: that is, the magnetic field rotates, and the stator coil cuts the magnetic lines of force to generate alternating current in the stator coil. The arrangement of the three stator coils determines that the phase of the alternating current generated by the three coils is shifted by 120 degrees, which is called three-phase alternating current.

(3) The amplitude of the AC voltage output by the stator coil increases in proportion to the generator speed. The regulator regulates the energized current of the rotor coil to control the output voltage of the generator.

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