SU892484A1 - Pulsed transformer - Google Patents

Description

(54) PULSE TRANSFORMER

I

The invention relates to electrical engineering and can be used in pulsed radio engineering and radar devices for changing the voltage and polarity of electrical pulses without significant distortion of their shape.

A pulsed transformer without a core is known, the primary spiral winding of which is located between the conical sections of the secondary winding PJ.

The disadvantages of the transformer are the design complexity, low coupling coefficient.

A pulsed transformer is known in which one winding consists of several galvanically uncoupled sections placed on toroidal cores f2J.

Closest to the proposed technical essence is a pulse transformer containing a core of several toroids.

.in each of which is placed separately, not galvanically connected composite, section of the primary winding and a single-turn secondary winding h.

The disadvantages of the known transformers are the design complexity, significant distortions of the pulse front caused by the presence of a ferromagnetic core.

ten

The purpose of the invention is to reduce the pulse front distortion and simplify the design of a pulse transformer.

The goal is achieved by

tS that in a pulse transformer containing a primary winding consisting of several galvanically not connected sections, and a secondary winding, the sections of the primary winding are located in a single layer on a cylindrical frame made of insulating material, each turn of one of the sections is located two turns of adjacent sections, a. the conclusions of the sections are distributed evenly around the perimeter of the ends of the winding.

In addition, the secondary winding consists of two layers with equal numbers of turns, between which the primary winding layer is placed.

FIG. I shows a pulse transformer,; FIG. 2 - the same, top view.

A pulse transformer contains a primary winding .1 consisting of several galvanically unrelated sections placed in one layer, and each turn of one of the sections is located between two turns of adjacent sections, and the conclusions of 2 sections of the primary winding are evenly spaced around the perimeter of the winding ends, secondary winding 3, which consists of two identical layers connected in series or parallel, insulating gaskets 4 and a cylindrical frame 5 of insulating material, for example, fluoroplastic, organic glass, electr rokartona, stekloepoksida

Pulse transformer operates as follows.

When simultaneously applied to a section of the primary winding from individual square-wave impulse generators, voltage and, on the secondary winding, according to the law of electromagnetic induction, a voltage pulse occurs and Tsi1 / TG, where I is the transformation coefficient, Y is the transformer efficiency.

The use of a cylindrical frame simplifies the design, reduces the resistance of the winding wires, and improves the manufacturability of the pulse transformer.

The proposed arrangement of the primary winding sections and their conclusions allows to obtain small values of parasitic capacitances and, inductances of the terminals, provides a rigid electromagnetic connection between the two sections, which leads to the alignment of currents on

output stages of pulse generators.

The proposed secondary winding design makes it possible to reduce the leakage inductance compared to a single-layer secondary winding by a factor of 2 with parallel connection of the layers and 2.67 times with a series connection.

Especially: the application of the proposed pulse transformer with generators with low internal resistance, for example, transistor and thyristor ones, is effective.

Claims (3)

1. A pulse transformer containing a primary winding consisting of several galvanically not connected sections and a secondary winding differing TeMs4TO, in order to simplify; construction, reducing distortion; the pulse front, the primary winding section. placed a single layer on a cylindrical frame of insulating material, each turn of one of the sections is located between two turns of adjacent sections, and the conclusions of the sections are distributed evenly around the perimeter of the ends of the winding. 2, Transformer according to claim 1, 1, characterized in that the secondary winding consists of two layers with equal numbers of turns between which the primary winding layer is located. Sources of information taken into account in the examination 1. Copyright certificate RSR №. 187113, cl. H 01 F 19/08, 1965. 2. Japanese Patent No. 51-9126, Cl. 56 B 13, 1976. 3. Copyright certificate. USSR № 480121, cl. H O F 19/08, 1971 ,. FIG. one