SU1352557A1 - Semiconductor converter - Google Patents

Abstract

The invention relates to electrical engineering, to the design of high-power high-voltage thyristor rectifiers. The goal is to reduce the cost and simplify operation by simplifying repairs. The proposed device comprises a tubular body 1 in which tablet thyristors 2, coolers 3 are placed. On the inner surface of case 1 are placed the first contact plates 6, hermetically connected to the separating blocks 7, and in each cooler 3 there is a hollow groove where the first spring-loaded contact 5, interacting with one of the indicated contact plates 6. The second contact plates are hermetically connected to the outputs of the control units II, and the control electrodes of the thyristors are connected to the second spring-loaded coil The contact interacting with the second contact plate and located on the insulator placed on the surface of the cooler 3. The audits and repairs are simplified due to the fact that after draining the oil and removing the upper support, it is not necessary to disconnect any conductors. spring-loaded contacts slide along the vertical recesses of the housing. 5 W1. S (L ro jV N5 JV JV

Description

 1352557

refers to electric power on

technology, powerful high-voltage conversion blocks containing a large number of series-connected thyristors.

The aim of the invention is to reduce the cost and simplify operation by simplifying the repair.

Figure 1 shows semiconductor contact plates 6. This is a non-transducer, general view; figure 2 - section aa in figure 1 (the cooler in the place of installation of the spring-loaded contact); fig.Z - the same, but when the cooler is removed from the case; Fig. 4 shows the isolator pi of the control electrode; Fig. 5 shows the arrangement of the conductive coating on the semiconductor converter case.

The semiconductor converter (Fig. 1) contains an insulating, for example, glass-epoxy, tubular body 1 in which tablet thyristors 2 are located, sandwiched between coolers 3 with ribs 4. In coolers 3 through a spring-loaded contact 5, located in the groove of cooler 3 and the first contact plates 6, hermetically pressed into the housing 1, are connected separating blocks 7.

The control electrodes of the thyristors 2 through the isolator 8 of the control electrode circuit (Fig. 4), the second spring-loaded contact 9 and the second contact plates 10, hermetically pressed into the housing 1, are connected to the outputs of the control blocks 11.

The outer busbar is connected to the output terminals 12, the nozzles 13 have 40 contact plates 6 and blocks 7, are pressed for supplying and discharging the transformer - 1 1, which is necessary for uniform torrent oil, and the voltage divider element 14 The required compression of the thyristors of the 2. luprovodnikovogo converter.

The separating units 7 provide, for the semiconductor conversion, an uniform distribution of the periodic external installation of external and impulse voltages over the tiris surface of the insulating body 1 to the tori 2 and the surface of the semi semi-ribbed to increase the length of the leakage current path.

conductor converter and may be combinations of linear or non-linear elements.

The control units 11 consist of a storage device connected at the right time to the control electrode of the corresponding thyristor using a transformer, light or other channels. The control units 11 are powered from the voltages of the corresponding thyristors.

Figure 2 shows the device of a spring-loaded contact 5 located in the groove of the cooler 3. The spring 14 provides the required pressing of the contact 5. to the first contact plate 6. The second contact plates 10 are offset around the circumference of the housing 1 at an angle relative to the perimeter to eliminate short circuits them. However, this displacement should not be made excessively large, since this increases the length of the loop: the control electrode is the thyristor cathode, which reduces the noise immunity of the device. The groove of the cooler 3 has a flange 15, which prevents the contact 5 from slipping out when it is removed from the housing

cooler 3.

Fig. 3 shows the position of the contact 5 with the cooler 3 removed from the housing 1. The flexible connection 16 provides for the electrical connection of the contact 5 with the cooler 3 at any position of the contact 5.

Figure 4 shows the device of the control circuit isolator 8. Insulator 8 (textolite) with the help of paws 17

attached to the surface of the cooler 3. Terminal 1B serves to connect the control electrode of the thyristor 2; A conductor 19 placed in the body of an insulator 8 connects terminal 18 and a flexible connection 20 of a spring-loaded pin 21 of pin 9.

Fig. 5 shows a conductive coating 22 in the form of a circle around the housing 1, to which the loudspeakers of the outdoor installation are connected. For the outer semiconductor converter 45, the outer surface of the insulating housing 1.

can be ribbed to increase the length of the leakage current path.

As part of a semiconductor pre-CQ former, modules can be connected in various ways, in series or in parallel.

The device works as follows.

When applied to a semiconductor converter of direct voltage, it is distributed evenly between the thyristors 2 and across the surface of the housing using dividing blocks 7.

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31

1. In this case, the accumulators of the control units 11 are charged. At the moment of arrival of the control pulse from the light transformer, etc. their channel drives are thinned to thyristor control electrodes 2, providing powerful and steep unlocking pulses. This is achieved due to the proximity of the control units 11 to the respective thyristors. As a result, the thyristors 2 open and the conduction period begins.

The cooling oil, the passage through the pipe 13, provides cooling thyristors. Due to the fact that the fins 4 of the coolers 3 of the adjacent thyristors are tilted in different directions, the flow of oil is turbulized and the intensity of cooling is very high.

In the event of damage to one of the modules, it can be quickly replaced by a backup, and the device will be restored to normal operation. The number of thyristors can be taken to a minimum, which reduces the cost and weight and size parameters with an increase in reliability.

Repair and revision can be carried out quite quickly and efficiently. After draining the oil and loosening the compressive element 14, the upper cover of the housing 1 is removed and through it the thyristors 2 are removed together with the coolers 3. It is not necessary to disconnect any low-current conductors - spring-loaded contacts 5 and 9 are slippers t in vertical grooves

352557

Enclosures 1. Assembly takes place in reverse order after repair or replacement of module elements.

The optimal voltage of the proposed semiconductor converter lies in the range of 40-50 kV.

ten

Claims (1)

Invention Formula A semiconductor transducer containing a cylindrical insulating case filled with dielectric fluid, inside which semiconductor devices are placed beneath each other, sandwiched between coolers, and connected to external separator blocks and control units through sealed bushing insulators differing from that, in order to reduce the cost and simplify operation due to to simplify repairs, it is provided with first and second contact plates and spring-loaded contacts and insulators, in each cooler there is a groove in which the first spring-loaded abutting against the first contact plate fixed to the housing wall and connected to the separating blocks is placed, on each cooler there is an isolator , a groove is made in it, in which a second spring-loaded contact is placed, connected to the control of the 1m electrode of the semiconductor device and abutting against the second contact plate connected with control unit outputs. Yu 1b fig.Z FIG. 2 20 21 9 v t. figl Editor N.Slobod nickname Compiled by L.Shakina Tehred L. Serdyukova Corrector I. Erdeyi Order 5571/52 Circulation 697 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, unitary enterprise. Design, And fie5