SU1252821A1 - Variable-ratio transformer - Google Patents

Abstract

The invention relates to the field of electrical engineering, in particular, to transformer devices used to power and stabilize the mode of electrophysical and technological installations. The purpose of the invention is to improve the energy parameters by reducing the dissipation inductance and high filling coefficient of the transformer working volume. The transformer contains an armored magnetic core 1 carrying the primary and secondary windings 2 and 3. An additional winding 5 is located in the central cylindrical volume 4 of the armored magnetic core. The additional winding is connected through opposite-connected thyristors in parallel to the primary winding 2, which is shunted by a capacitor. The advantage of the invention is due to the low inductance of the scattering systems of the main windings located on the common cylindrical rod of the spatial magnetic conductor. 1 hp f-ly, 2 ill. a (L ft / Yu Jf 7 ZZ

Description

The invention relates to electrical engineering, in particular, to a transformer device used to power and stabilize the mode of physical and technological installations.

The purpose of the invention is to improve the energy parameters by reducing the dissipation inductance and high filling coefficient of the working volume of the transformer with active materials.

FIG. 1 shows a transformer assembly of an adjustable transformer, the general view of FIG. 2 - schematic diagram of the device. I

Transformer contains armor

the magnetic circuit 1 carrying the primary 2 and secondary 3 windings. An additional winding 5 is located in the central cylindrical volume 4 of the armored magnetic core. The magnetic core is made in the form of a system of two concentric columns of ferrite ring cores 6, closed at the ends by ferromagnetic ring flanges 7. On the axis of the magnetic core there is an additional core 8 consisting of a rod 9 and disks 10. Insulating cylinders 11 and 12 and the support ring 13 serve to fix the windings.

All the junction points 14 of the elements of the armored spatial magnetic core are connected with an adhesive, which ensures the tightness of the structure.

The inputs to the windings 15-17 are made in the form of dielectric sleeves, built-in disk-shaped magnetic cores. The additional winding is connected through anti-parallel connected thyristors 18 parallel to the primary winding, shunted by a capacitor 19. The internal toroidal cavity of the magnetic core 20 is filled with a liquid dielectric.

The magnetic conductor and one of the terminals of each winding are grounded at point 21 with the aid of a volume conductive screen 22.

The transformer works as follows.

The inputs of the primary winding 2 are connected to a high frequency converter or an autonomous power source. Transformer magnetic circuit mode is determined by the interaction

five

0

five

0

five

0

five

, and in addition

two magnetizing currents flowing through primary 2 positive 5 windings. Depending on the state of conduction of one of the two thyristors of the regulator 18 (open or closed), additional magnetization or demagnetization of the armored magnetic circuit 1 is carried out. High-frequency magnetic flux is redistributed in the volume of the magnetic core, which allows controlling the voltage of the secondary winding within 10% 3, or stabilize the voltage and power levels.

In the process of cyclic unlocking of the thyristors of the regulator 18, the magnetizing power supplied to the additional winding 5 is taken from the capacitor 19. The additional winding 5 itself does not participate in the transfer of active power to the main windings 2 and 3, since it is located in the central cylindrical volume 4, completely shielded ferromagnetic elements of the design of the armor magnetic circuit 1. The adjustment and stabilization of the output parameters of the device is carried out without reducing the coupling coefficient o novnyh windings 2 and 3, and also without reducing cos f, as through controller 18 proceeds only magnetising current.

The advantage of an adjustable transformer is due to the improvement of the specific energy characteristics in the high-frequency mode due to the low inductance of the scattering system of the main windings located on the common cylindrical core of the spatial magnetic core. The location of the additional control winding in the central hollow volume of the magnetic core allows the thyristor controller to be calculated only on the power of the biasing circuit, which does not exceed a few percent of the total power of the device.

Claims (2)

1. An adjustable transformer containing an armored magnetic core with 55 primary, secondary and additional control windings, characterized in that, in order to improve the energy parameters due to a decrease in inductance of scattering and a high filling factor of the working volume with active materials, the transformer additionally contains a thyristor controller and a capacitor, the armor magnet cable is designed as a system of two concentric columns of ferrite ring cores closed at the ends with ferromagnetic ring frames, regulatory Editor O. Golovach Order 4625/51 Circulation 643 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 -Production and printing company, Uzhgorod, Projecto st., 4 528214 The winding is located in the central volume and is connected in parallel to the primary winding through a thyristor controller, and the primary winding is shunted by a capacitor. 2. A transformer according to claim 1, wherein the internal toroidal cavity of the magnetic circuit with the primary and secondary windings is sealed and filled with a liquid dielectric. ten FIG. 2 Compiled by I.Yakimets Tehred O.Sopkr Proofreader I. Muska