The generator speed was set during design and has nothing to do with the amount of power generated.
For alternating current, the speed of the generator determines the frequency of the alternating current, its voltage is determined by the excitation and winding, and the current is determined by the resistance of the output circuit energy to food. consumption, that is, charging, because the energy production and energy consumption are completed in an instant.
Therefore, the current also changes with the load. The product of current and voltage is power. Since generator power cannot change instantly, changes in current will cause voltage fluctuations, resulting in speed changes.
Generators are widely used in industrial and agricultural production, national defense, science and technology and daily life. IslandThere are many forms of generators, but their operating principles are all based on the law of electromagnetic induction and the law of electromagnetic force. Therefore, the general principle of its construction is: using suitable magnetic and conductive materials to form magnetic circuits and circuits that conduct electromagnetic induction among themselves to generate electromagnetic energy and achieve the conversion goal of energy.
Detailed information:
Whether it is a diesel generator or of a gasoline generator, both Each cylinder performs work in a certain order, and the thrust acting on the piston becomes the force that drives the rotation of the crankshaft through the connecting rod, thereby causing the crankshaft to rotate.
By installing the brushless synchronous alternator coaxially to the crankshaft of the electric machinee, the rotation of the electric machine can be used to drive the generator rotor. Using the principle of "electromagnetic induction", the generator. will produce an induced electromotive force. The charging circuit can generate current.
In principle, they are divided into synchronous generators, asynchronous generators, single-phase generators and three-phase generators. In terms of generation method, they are divided into steam turbine generators, hydraulic generators, diesel generators, gasoline generators, etc. In terms of energy, it is divided into thermal generators, hydraulic generators, etc.
When the generator is connected to a symmetrical load, the three-phase current in the armature winding will produce another rotating magnetic field, called the armature reaction magnetic field. Its speed is exactly equal to the speed of the rotor and the two rotate synchronously.
The magnetic field of reactionarmature and the excitation magnetic field of the rotor of the synchronous generator can be approximately considered to be distributed according to the sinusoidal law. The spatial phase difference between them depends on the temporal phase difference between the no-load electromotive force E0 and the armature current I. The armature reaction magnetic field is also related to the charge state.
When the generator load is inductive, the armature reaction magnetic field acts as a demagnetizer, which will cause the generator voltage to decrease; when the load is capacitive, the armature reaction magnetic field acts as; a magnetizer. This will increase the output voltage of the generator.
Baidu Encyclopedia - Generator
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