SU1557593A1 - High-voltage pulse transformer - Google Patents

Abstract

The invention relates to electrical engineering and can be used in pulsed electric power, electrical and radio engineering devices. The purpose of the invention is to increase the steepness of the front of the transmitted pulse and unify the design of the pulse transformer. The pulse transformer contains a magnetic core 1 composed of rings arranged in the form of a torus, the primary winding placed inside the magnetic core and formed by a hollow metal torus divided into sections 2 in the form of curved cylinders. The secondary winding 3 is made toroidal and is located coaxially inside the primary one, and its turns are arranged in such a way that in the plane of the cross section they form an Archimedes spiral with a step varying linearly. In this case, the end 5 of the secondary winding is located inside the helix and is led out of the transformer through insulator 6, and its beginning is located closer to the magnetic conductor. Insulation 8 of the secondary winding is made by pouring an elastic compound. The terminals 9 of the primary winding sections are connected to the power supply terminals in parallel. 3 il.

Description

The invention relates to electrical engineering and can be used in pulsed electrical power, electrical and radio engineering devices to increase the voltage of high-power electrical pulses without significant distortion of their shape.

The aim of the invention is to increase the steepness of the pulse front and unify the structure.

1 shows a pulse transformer, a general view; FIG. 2 is a diagram of connected windings; FIG. 3, a pulse transformer, a cross section.

The pulse transformer contains a magnetic core 1s composed of m rings arranged in the form of a torus, the primary winding placed inside the magnetic core and formed by a hollow metal torus, divided into sections 2 in the form of curved cylinders. The secondary winding 3 is made toroidal and is located coaxially inside the primary one, and its turns 4 are arranged in such a way that in the plane of the cross section they are arranged in a spiral of Archimedes with a step varying linearly. The end 5 of the secondary winding is located inside the helix and is led out of the transformer through insulator 6, and its beginning 7 is located closer to the magnetic conductor. Insulation 8 of the secondary winding is made by pouring an elastic compound. The terminals 9 of the primary winding section are connected in parallel with the power supply terminals.

High-voltage pulse transformer operates as follows.

0

five

0

35 40 5

45

50

When a voltage pulse is applied to parallel sections of the primary winding, currents flow through them, and the current of each section creates magnetic flux only in that part of the magnetic circuit that corresponds to this section. Under the action of the total magnetic flux in accordance with the law of electromagnetic induction, a voltage pulse arises in the secondary winding, the magnitude of which is directly proportional to the product of the number of primary winding sections and the number of turns of the secondary winding.

Thus, the leakage inductance compared with the prototype decreases in proportion to the number of sections of the primary winding, since when the sections are connected in parallel, the equivalent leakage inductance of the primary winding decreases, which leads to an increase in the steepness of the front of the transmitted pulse. The transformation ratio increases in proportion to the number of sections of the primary winding, since the magnitude of the voltage applied to the primary winding is reduced in proportion to the number of its sections. In addition, the isolation reliability is improved, so the dielectric is in a weakly inhomogeneous field, due to the coaxial design of the transformer and a uniform increase in the insulation thickness from the beginning of the secondary winding to its end.

There are great opportunities for unifying transformers of this type. Transformers can be developed for different voltages and powers when using cores of the same size by changing their quantity. An increase in the steepness of the pulse front can be achieved by increasing the number of sections of the primary winding,

A significant (5-6 times) reduction in the mass of the transformer can be achieved. In this case, the transformer made on the rings of the minimum size, the choice of which is determined only by the requirements for the reliability of the insulation, has the lowest mass.

The main advantage of the design is the high density of electrical and magnetic energy, due to the minimum length of the average magnetic field line and the minimum amount of high-voltage insulation.

Claims (1)

Formula inventions n and A high-voltage pulse transformer containing a magnetic core composed of ring cores within which primary and secondary windings are located, characterized in that, in order to increase the steepness of the pulse front and unify the design, the primary winding has the shape of a torus divided into sections in the form of curved cylinders that are included in parallel, the secondary winding is laid inside the primary winding, and its coils are arranged in the plane of the cross section along an Archimedes spiral with a step varying linearly. fififl FIG. 2 eight fig.Z