Do you know how a magnetic voltage regulator works?

The magnetic voltage regulator is a combination of a saturable reactor (hereinafter referred to as a reactor) and a transformer. The reactor is mainly used to regulate the input voltage of the transformer, and the transformer increases or decreases the adjustable input voltage to any voltage required by the load value.

There are both electrical and magnetic connections between the reactor and the transformer. Its structure is similar to that of ordinary power transformers, unlike other types of movable contacts that have mechanical drive installation or voltage regulation for voltage regulation. It is suitable for places with high voltage output or low voltage and high current output. Salt bath furnaces, electron bombardment furnaces, high voltage electrostatic dust removal installations and other voltage regulating power supplies have adopted various voltage regulators.

When the input terminal of the magnetic voltage regulator is connected to the voltage U1, and the output terminal is connected to the rated negative resistance R, if the DC control current Ik=0, the reactor will not be magnetized by the DC, and the AC permeability is large, which is reflected in the The impedance on the winding G is much larger than the total primary impedance of the transformer. Therefore, the power supply voltage is distributed on the winding G on the basis of recognition, while the voltage UB1 on the primary side of the transformer is very small, and the lower limit of the load voltage U2min can be obtained when it reaches .

Gradually increase Ik, because the dead center of the reactor is subjected to different levels of DC magnetization, the AC permeability gradually decreases, so the voltage y5l and the load voltage U2 gradually increase. If Ik reaches the rated value Jka, the dead center of the reactor will be affected by the DC height. Magnetization and saturation, the impedance of the electric device is also smaller than the primary total impedance of the transformer. Therefore, the voltage U1 is basically distributed on the winding Bl. At this time, the load voltage U2 can reach the maximum U2max.