SU1695405A1 - Transformer - Google Patents

Abstract

The invention relates to electrical engineering, in particular, to transformers used to power electrical installations. The device solves the problem of increasing the reliability and improving the weight and size characteristics. The transformer contains a magnetic core 1, multilayer primary 2 and secondary 3 windings, at least one of which has a tap 6 from the middle, dividing it into two successively connected semi-windings. A winding with a tap from the middle contains an even number of layers, and the turns belonging to different semi-windings, starting from the tap from the middle, are located one above the other in adjacent layers. 2 Il.

Description

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The invention relates to electrical engineering, in particular to transformers used to power electrophysical instruments and installations.

The purpose of the invention is to increase the reliability and improve the weight and size characteristics by reducing the inductance of the dispersion of the half windings.

Fig. 1 shows the layout of the layers of the transformer secondary winding; Fig. 2 is a power supply diagram of an electron accelerator using the proposed transformer.

The transformer contains a magnetic conductor 1, a primary winding 2, a multilayer secondary winding 3 with terminals beginning 4, end 5 and tap 6 from the middle of the winding.

The secondary winding contains an even number of layers, for example six. The letters H and K mark the beginnings and ends of the layers of the secondary winding, wound in one direction. The removal from the middle of the secondary winding can be performed from the extreme turns of both the first two and the last two layers. The ends of the layers are connected to the beginnings of the respective adjacent layers. The transformer can be applied magnetic rod-type, armored or toroidal type. A screen may be used between the primary and secondary windings, if necessary.

As an example of the application of the proposed transformer, FIG. 1 shows the power supply of an electron accelerator comprising a pulse generator, a pulse transformer 8 with two secondary windings 9 and 10, two proposed transformers 11 and 12, an accelerator 13 of electrons, a power supply unit 14 of filament-chains, located together with the transformer 12 in the zone of the high pulse potential of the accelerator, capacitors 15, shunting secondary half windings of transformers 11 and 12. Conclusions of the secondary windings of transformers 11 and 12 connect enes with the findings of the secondary windings 9, 10 of the pulse transformer 8 and the intermediate tap connected to the anode and cathode of the accelerator.

The alternating current of the mains supply flows through the secondary windings 9 and 10 of the pulse transformer 8 in opposite directions (shown in FIG. 2 by dashed arrows), therefore it practically does not create a magnetic field in its core.

During the formation of a voltage pulse in the secondary windings of a pulsed

the transformer the pulse current of the electron accelerator 13 is closed along the circuit (indicated by solid arrows in figure 2): the secondary windings 9 and 10 of the pulse transformer 8, the secondary half windings

transformer 11, its average outlet, the anode-cathode of the accelerator 13, the average removal of the secondary winding of the transformer 12. The impulse currents in the semi-windings of the secondary windings of the transformers 11 and 12 flow

in opposite directions, their magnetic fields are compensated up to a scattering flux determined by the scattering inductance of the secondary semi-windings relative to each other. The overvoltages that occur during the passage of current pulses at the terminals of the secondary windings of transformers relative to the average output depend on the magnitude of the dispersion inductance and the rate of increase of the pulses of the load current. The small inductance of the dissipation of the semi-windings of the proposed transformer allows reducing the overvoltage at its terminals even at load breakdowns, when

current pulse amplitude. Reducing overvoltages increases the reliability of the transformer and reduces the insulation of the transformer windings, which improves its weight and size characteristics. In addition, reducing the inductance of the semi-windings allows reducing the capacitance value of the shunt semi-winding capacitors 15, which also reduces the weight and dimensions of the equipment.

Claims (1)

Invention Formula A transformer containing a magnetic conductor, multilayered primary and secondary windings, at least one of which has a branch from the middle, dividing it into two series-consistently connected semi-windings, characterized in that, in order to increase reliability and improve weight and size characteristics by reducing inductance the scattering of the semi-windings, the windings with a branch from the middle contain an even number of layers, and the turns belonging to the half-windings, starting from the branch from the middle, are located one above the other in adjacent layers x. YG-NO // n fig.Ј