The principle of field current regulation

In the change of generator excitation current, generally does not directly in the rotor circuit, because the loop current is very big, is not convenient to adjust directly, usually adopted method is to change the exciter excitation current, to achieve the purpose of regulating the generator rotor current.

The commonly used method is to change the electrical resistance of the exciter excitation circuit, change the additional exciting current exciter, changing the conduction Angle of silicon controlled rectifier, etc.Here are primary change thyristor conduction Angle method, which is based on the change of the generator voltage, current, or power factor, accordingly change the conduction Angle of silicon controlled rectifier, so generator field current can change accordingly. 　　

The device, generally by the transistor, thyristor electronic components, sensitive, rapid and no failure zone, big output power, the advantages of small volume and light weight.In accident cases can effectively inhibit overvoltage and achieve rapid out magnetic generator.

Using silicon controlled excitation current regulating circuit block diagram