Diesel Generator Tech

Voltage Regulation Principle After the generator set starts, it relies on the residual magnetic voltage of the motor. After rectifying, it provides the excitation current to the magnetic field of the AC excitation machine, and the armature voltage of the AC excitation motor increases gradually. The AC voltage is fed into the host magnetic field after the rotation rectifier, which makes the main generator establish the voltage. When the speed is close to the rated value, the voltage regulator AVR makes the generator rise rapidly and stabilize at the rated value. The electrical principle is shown in the diagram. During normal operation of generator, if for some reason, such as load change, speed change, winding temperature change and so on, the generator terminal voltage will increase or decrease. Automatic voltage regulator AVR can detect this small voltage deviation and rapidly reduce or increase the excitation current to maintain the generator terminal voltage approximately...