The working principle and introduction of magnetic voltage regulator
The magnetic voltage regulator is an organic combination of a saturable reactor (hereinafter referred to as a reactor) and a transformer. The reactor is mainly used to adjust the input voltage of the transformer, and the transformer increases or decreases the adjustable input voltage to any desired value of the load. Voltage value.
There are both electrical and magnetic connections between the reactor and the transformer. Its structure is similar to that of an ordinary power transformer, unlike other types of movable contacts that have mechanical drive installation or voltage regulation for voltage regulation. It is especially 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 regulators have been widely used in voltage regulators.
The working principle of the magnetic voltage regulator: the AC working winding and the DC control winding of the reactor respectively, B1 and B2 are the primary winding and the secondary winding of the transformer. The winding G and B1 are connected in series to form an electrical circuit between the reactor and the transformer. 's contact.
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 DC, and the effective AC permeability is large, which reflects The impedance on the winding G is much larger than the total primary impedance of the transformer. Therefore, the power supply voltage is basically distributed on the winding G, 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 subject to different levels of DC magnetization, the AC effective 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. The magnetization is saturated, the AC effective permeability becomes smaller, and the impedance of the electric device is also smaller than the total primary impedance of the transformer. Therefore, the voltage U1 is basically distributed on the winding Bl. At this time, the load voltage U2 can reach Big U2max.
