SU720546A1 - High-voltage pulse transformer - Google Patents

Description

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The invention relates to a pulse technique and can be used proprietaryly in creating high voltage pulse sources in devices for generating electron beams and intense X-ray pulses.

High-voltage pulse transformers, including Tesla resonant transformers, are known, for example, with volumes made of a wide electrically conductive tape Clj.

The known transformers are distinguished by the complexity of the winding technology and the complexity of ensuring high reliability of electrical insulation between turns.

Also known high-voltage pulse transformer containing / primary coil and secondary winding, made in the form of a single-layer coil placed coaxially with the primary coil -,

In this transformer, a low-inductance capacitor is connected to the secondary winding, the capacitance of which exceeds the own capacity of the turns of the secondary winding. The gap between the turns of the primary and secondary windings is filled with a dielectric.

A disadvantage of the known transformer is the greater likelihood of breakdown between the turns of the secondary winding due to the occurrence of increased voltage gradients during the rapid discharge of a low-inductance capacitor connected to the secondary winding. It should be noted that the known transformers have low specific power, and consequently, large dimensions.

In addition, an increase in the capacitance of an additional capacitor leads to an increase in the growth time of high voltage.

The aim of the invention is to reduce the likelihood of a breakdown between the turns of the secondary winding and reduce the size of the transformer. For this, in the proposed transformer, the turns of the secondary winding have a variable cross-section, gradually decreasing from the high-voltage output. By varying the cross section of the turns of the secondary winding, the total electrical induced charge on the surface of each turn approaches zero. In this case, the capacitor, formed by the turns of the secondary winding and the primary turn in the discharge stage, is equivalent to the length of the coaxial line. In the best case, the size of the orders from the subsequent turns is determined from the condition that the electric charge stored in the container between the previous one; and (fi - 1) and the subsequent (n) turns, is close to or equal to the total electric charge stored in the capacitor. x all previous turns in relation to the primary turn. For the case when the voltage grows linearly along the turns, the geometrical dimensions are determined from the relation: N- (W-l), where N is the number of turns from the bare end; and - the width of the coil; the size of the gap between the primary coil and the secondary winding; h is the height of the coil; S- gap between adjacent turns. The drawing shows a high-voltage pulse transformer. The transformer consists of a primary coil 1, which is a hollow cylinder made of electrically conductive material with a cut along the pattern of a capacitor 3. A secondary winding 4 is located coaxially with the primary coil. The coils of the winding 4 have a variable cross section and they are connected to the coil. the height decreases from the high-voltage breakdown 5. The low-voltage lead is connected to the primary alarm, and the turns of the secondary winding form with the primary wind a combination with distributed parameters that is closed zkovoltnogo end K pysokovoltnomu terminal connected discharge gap. An ignition transformer 6 is used to initiate the bit 2. The transformer works as follows. In the initial state, the capacitor bank 3 is charged before the voltage UQ. At a given point in time, the switch is started (bit 2) from the ignition transformer 6. A battery of capacitors is connected to the primary turn. In the secondary winding, a high voltage pulse is transformed. In this case, there occurs a charge of distributed interturn and interwinding capacities. When short-circuiting the high-voltage output, the interwinding and inter-turn capacitances are discharged to the load in addition to the turns of the secondary winding, and the voltage distribution along the turns of the winding practically does not change, which reduces the possibility of breakdowns between adjacent turns. In the discharge stage, the primary coil and the secondary winding are a coaxial capacitor, which eliminates the need for an additional low-inductance capacitor. This makes it possible to increase the power density of the transformer and, consequently, reduce its dimensions. formula of the invention High-voltage pulse transformer containing a primary coil and a secondary winding with a high-voltage output, made in the form of a single-layer coil placed coaxially with the primary coil, characterized in that, in order to reduce the likelihood of breakdown of inter-turn insulation and reduce the dimensions of the transformer, secondary winding have, variable cross-section, continuously reduced. from high voltage output. Sources of information taken into account in the examination 1. Finkelstein, Goldberg, Shukhovatits, Sz {emya for receiving high-voltage pulses, Instruments for scientific research, 1966, No. 2, p. 15. 2, Copyright svdededelstvo USSR № 224712, cl. H O5 And 5/06, 1968,

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Claims (1)

Claim A high-voltage pulse transformer containing a primary coil and a secondary winding with a high-voltage output, made in the form of a single-layer coil placed coaxially with the primary coil, characterized in that, in order to reduce the likelihood of breakdowns of inter-turn insulation and to reduce the dimensions of the transformer, the turns of the secondary winding have a variable section, continuously decreasing. from high voltage output.