What is the principle of magnetic voltage regulator?

The magnetic voltage regulator is composed of a transformer and a saturable reactor. Its working process is to use the adjustable characteristics of the saturable reactance to change the distribution ratio of the power supply voltage on the primary winding (WB1) of the transformer and the reactance winding (WG) of the reactor. Then achieve the purpose of adjusting the output voltage twice.

Because the magnetic voltage regulator includes the function of saturable reactor, and the reactance winding has the function of current limiting, so it can obtain better dropout characteristics.

There are two types of magnetic voltage regulators: iron core, ring type and column type.

The cylindrical core is similar to the general transformer, which is made of silicon steel sheets of the voltage regulator; the ring core is rolled with silicon steel strips. For those with a capacity of 20kVA and below, the ring core is mostly used; for those with a capacity exceeding 20kVA, the cylindrical core is mostly used.

In the ring structure, the winding is wound on the ring core with a single layer of insulated copper wire. The outer surface of the coil is ground off the insulating layer to form a lubricating plane, and the brushes made of electrochemical graphite are in contact with it. Using electromagnetic phenomena, The brush can be rotated and slid on the surface of the wire by the handwheel, and then the output voltage can be changed.

Magnetic voltage regulator is a non-mechanical, non-contact voltage regulator, which can drive the load for smooth stepless voltage regulation. The voltage regulation is controlled by DC current, which can be manually controlled in open loop, or can be adjusted according to different requirements. The control signal of the control signal completes the closed-loop automatic control, and it is the executive element in the automatic control system.

Magnetic voltage regulator is a device that integrates voltage saturable reactor and furnace power transformer. It uses low-power DC current to control the magnetic characteristics, and then steplessly adjusts the working voltage and power. Magnetic voltage regulators are high internal resistance, soft external Features Power equipment, high reliability, easy operation and maintenance, easy to complete automatic control and other characteristics, so it is widely used in salt bath furnaces, vacuum furnaces, single crystal and polycrystalline furnaces, vertical melting furnaces, cracking furnaces and other industrial furnaces. , Aluminum silicate refractory fiber electric melting furnace, the application field is getting wider and wider.