The generator refers to the mechanical equipment that converts other forms of energy into electrical energy. It is driven by water turbine, steam turbine, diesel engine or other power machinery. It converts the energy generated by water flow, air flow, fuel combustion or nuclear fission into mechanical energy and then transfers it to the generator, which is converted into electric energy by the generator. Generators are widely used in industrial and agricultural production, national defense, science and technology and daily life. The generator has many forms, but its working principle is based on the law of electromagnetic induction and electromagnetic force. Therefore, the general principle of its construction is: the magnetic circuit and circuit of mutual electromagnetic induction are constituted by appropriate magnetic and conductive materials, so as to generate electromagnetic power and achieve the purpose of energy conversion.
Structure for generators
The generator is usually composed of stator, rotor, end cover and bearing. The stator is composed of stator core, winding package, frame and other structural parts fixing these parts. The rotor is composed of rotor core (or magnetic pole, magnetic choke) winding, retaining ring, central ring, slip ring, fan and rotating shaft. The stator and rotor of the generator are connected and assembled by the bearing and the end cover, so that the rotor can rotate in the stator and make the movement of cutting the magnetic line of force, so as to generate the induced potential, which is led out through the wiring terminal and connected to the circuit, and then the current is generated.
The classification of generators
Generator: DC generator and AC generator;
AC generator is divided into synchronous generator and asynchronous generator (rarely used);
Alternator can also be divided into single-phase generator and three-phase generator.
There are many kinds of generators. In principle, it is divided into synchronous generator, asynchronous generator, single-phase generator and three-phase generator. It can be divided into turbine generator, hydro generator, diesel generator, gasoline generator and so on. It can be divided into thermal power generator, hydraulic generator and so on.
Generator working principle
The diesel engine drives the generator and converts the energy of diesel into electric energy.
In the cylinder of diesel engine, the clean air filtered by the air filter is fully mixed with the high-pressure atomized diesel from the fuel injection nozzle. Under the upward extrusion of the piston, the volume is reduced and the temperature rises rapidly, reaching the ignition point of diesel oil. When the diesel oil is ignited, the mixed gas burns violently, and the volume expands rapidly, pushing the piston downward, which is called “work”.
The gasoline engine drives the generator and converts the energy of gasoline into electrical energy. In the cylinder of a gasoline engine, the mixed gas burns violently and the volume expands rapidly, which pushes the piston down to work.
Whether it is a diesel generator or a gasoline generator, each cylinder works in a certain order. The thrust acting on the piston turns into a force to push the crankshaft to rotate through the connecting rod, thus driving the crankshaft to rotate. If the brushless synchronous alternator is installed in the same axis with the crankshaft of the power machine, the rotor of the generator can be driven by the rotation of the power machine. Using the “electromagnetic induction” principle, the generator will output the induced electromotive force, and the current can be generated through the closed load circuit.