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Diesel, gas or gasoline stations for generating electricity are often equipped with synchronous generators. The principle of their operation, like that of asynchronous ones, consists in the excitation of an electric current in the stator windings. However, this process does not occur under the influence of permanent magnets, but due to the influence of the rotating rotor winding. Depending on the type of winding, the rotor is phase or short-circuited. You can buy a power station and buy an XAS compressor on the gk-sk website, where there are many quality options.
In comparison with asynchronous electric generators, they have the following advantages:
have high resistance to peak loads;
perfectly ensure the stability of the output voltage;
easily tolerate significant overloads.
The disadvantages of this type of electric generator are:
the cost is higher than that of asynchronous analogues;
high complexity in maintenance;
in the process of operation, the brushes of the unit heat up and subsequently burn out, which leads to their frequent replacement.
A voltage drop during operation is characteristic of synchronous generators. This happens due to the demagnetization of the generator due to the effect of the inductive load. However, a capacitive load affects the generator in the opposite way. It is magnetized while raising the voltage level.
By regulating the electric current in the windings with the help of an AVR (automatic voltage stabilizer), a high level of stability at the output voltage is ensured. The use of AVR in the design of a synchronous electric generator allows to stabilize the voltage with a very low deviation from the nominal value of ± 0,5%.
The disadvantage of synchronous generators is also the possibility of overload due to the fact that the AVR can excessively increase the current level in the windings when the load is complete.
At the output, the synchronous electric generator produces a current whose value exceeds the nominal value by 3-5 times. This is a very useful feature for some types of electrical appliances (compressors or pumps) because they require a higher level of starting currents. This explains the frequent use of synchronous generators as the main or backup power source for a certain category of equipment.
