SU767915A1 - Motovilov's transformer - Google Patents

Description

(54) MOTOVILOV TRANSFORMER.

.one. The invention relates to a converter technique, namely, DC / DC downconverters. Similar converters are known - inverters, consisting of an inverter with a transformer in the AC code and an output rectifier. The transfer coefficients of the voltage converter are more than two, which limits its functionality. A disadvantage of the device is the relative increase in weight and size parameters due to the presence of an clearly pronounced inverter and rectifier unit. The closest in technical essence is a Motovilov DC transformer, which contains a transformer with 2p windings, on para windings, in the left and right parts of this circuit, connected to the source and load through 2p keys and 40 diodes and has a transmission coefficient of for example the life of K p + 1. When the transformer is working, the keys alternately connect the left and right parts of the transformer winding sections. Sections of one part of the winding are connected in series between the load and the source, and the other is parallel to the load. As a result, the source voltage is divided equally by n + 1 between the successive windings and the other parallel windings, the voltage across the load in n + 1; times less than at source 2 i Disadvantages of the device due to the large number of windings, switches and valves, which reduces efficiency, reliably. ness and increases the weight size of the transducer. The purpose of the invention is to increase the efficiency and reduce the weight and size parameters of the converter. The goal is achieved by the fact that in a Motovilov transformer, direct current, containing two series-connected winding section systems, which are connected differently through keys to one pole of the power source and through reverse diodes to the second pole, the winding sections are connected in pairs symmetrically, so that the beginnings and the ends of the pairs of symmetrical EH sections of the windings are galvanically connected at the output, and the beginnings of the sections are sealed with capacitors. . In Fig. 1, the converter circuit is shown at K 4; in fig. 2 diagram of his work.

The converter contains a converter transformer connected between source 1 and load 2 with windings 3-6, the inputs of which through reverse diodes 7-10 are connected to the second pole of the constant voltage source (in this example it is grounded). All windings are connected in two successive circuits through controlled keys 11-14.

The Converter operates as follows. The keys 11,13 and 12,14 are included alternately according to the diagram in FIG. 2. When the inputs of windings 3 and 5 are connected to source 1, direct current in windings 4 and 6 is supplied through reverse diodes 8 and 10, and diodes 7 and 9 are locked at this time by reverse voltage. Then, in the next half-period, these processes are repeated in symmetrically opposite keys 12 and 14, windings 4 and 6, and the corresponding diodes. At both half periods, windings 3 and 4 are connected in series between source 1 and ground, and the voltage of source 1 is divided by two, resulting in the transfer ratio of the stage of cascade 3-8 being two. The doubled voltage of the first stage feeds the same stage 9-14,: ia which also decreases twice, and the overall transformation ratio from the whole circuit is four. When key 11 is turned on, capacitor 15 is discharged through keys 6 and 5 and locks key 6, and choke 16 limits the output current of the cascade during this time.

In the proposed device, the number of windings, diodes and keys is 2 Bog2 K, or, in this case, 4, In a known device with the same

K the number of keys is 8, the diodes 8, the windings b, the leads of the windings 12. The number of keys, the diodes and the windings is reduced in K-l / Bo. to the times. Accordingly, the installed valve power and energy loss in them is reduced. The weight and size parameters of the transformer are reduced by reducing the number of windings and their leads.

Claims (2)

Invention Formula A transformer containing two series-connected 6-winding sections of the system, connected differently through the keys to one pole of the power source and through reverse diodes to the second pole, which is due to the fact that the efficiency and decrease of the large-sized parameters, sections of the windings are connected in pairs symmetrically, so that the beginnings and ends of the pairwise symmetric sections of the windings are galvanically connected to the output, and the beginning, sections are shunted by capacitors. Sources of information taken into account in the examination 1. Veselovsky ON, and others. Fundamentals of electrical engineering. M., VTSHT, 1977, p. 264-267. 2. USSR author's certificate in application number 2585377 / 24-07, cl. And 02 M 3/3335, 1978. l; 7 f 9ntl FIG. ;