RU123576U1 - HIGH VOLTAGE RECTIFIER TRANSFORMER - Google Patents

Abstract

1. Transformer-rectifier high-voltage, containing the upper and lower horizontal panels, placed between them a magnetic circuit with windings, semiconductor valves connected in pairs in series, characterized in that the upper and lower horizontal panels are made in the form of radiators with channels in which liquid-cooled heat exchangers are fixed; the magnetic circuit is made spatial, consisting of three equally spaced rods clamped by two parallel yokes, and the yokes are installed in the recesses of the radiators on a heat-conducting compound, and the radiators are tightened with fasteners; each rod is surrounded by concentrically located primary and secondary windings, while the rods with the primary winding are placed inside the sleeves, and the secondary windings are on sleeves that are installed on the nozzles of the insulator cups; semiconductor valves are located on racks attached to the side walls of the insulator cups. 2. The high-voltage transformer-rectifier according to claim 1, characterized in that the liquid-cooled heat exchangers are made in the form of bent cylindrical tubes and are fixed in the channels of the upper and lower radiators by soldering. High-voltage rectifier transformer according to claim 1 or 2, characterized in that the liquid cooling heat exchangers are connected to the product liquid cooling system using connecting flanges. A high-voltage rectifier transformer according to claim 1, characterized in that the primary winding is made in the form of a single-row frameless coil with a rectangular wire installed on a small edge, with a uniform gap between the turns,

Description

The utility model relates to the field of electronics and can be used in the design of high-voltage small-sized rectifiers for powering high-power electronic equipment.

Closest to the proposed technical solution is a high-voltage rectifier (certificate for utility model RU No. 27280, published: 01/10/2003, IPC: H02M 7/04) containing a transformer made on a toroidal magnetic circuit having primary and secondary windings with leads; the upper horizontal panel with through holes, on which an insulator is installed with through holes combined with holes in the upper horizontal panel; semiconductor valves connected in pairs in series, located in the gaps of the through holes of the insulator. The transformer is mounted with a gap on the vertical panel, which is connected to the upper and lower horizontal panels connected by stiffeners.

The disadvantages of this rectifier should be attributed to an insufficiently efficient heat sink at high heat loads.

The technical result of the proposed technical solution is to increase the efficiency of heat removal from the magnetic circuit, windings and radio elements of the high-voltage transformer-rectifier, increasing its electrical strength while ensuring a compact design.

The technical result is achieved by the fact that in a high-voltage rectifier transformer containing upper and lower horizontal panels, a magnetic circuit with windings placed between them, semiconductor valves connected in pairs in series, the upper and lower horizontal panels are made in the form of radiators with channels in which liquid-cooled heat exchangers are fixed . The spatial magnetic circuit consists of three equally spaced rods clamped by two parallel yokes. The yokes are installed in the recesses of the radiators on a heat-conducting compound, and the radiators are pulled together with fasteners. Each rod is covered by concentrically located primary and secondary windings. The rods with the primary winding are placed inside the sleeves, and the secondary windings are located on the sleeves that are installed on the nozzles of the insulating cups. Semiconductor valves are located on racks mounted on the side walls of insulator cups.

The essence of the utility model is illustrated by drawings:

figure 1 - General view of the transformer-rectifier high voltage;

figure 2 - view of the transformer rectifier high voltage from above;

figure 3 - General view of the transformer-rectifier high voltage in the perspective 3/4 from the bottom;

figure 4 - upper radiator (view from the outside);

5 is an upper radiator (view from the inside);

6 is a lower radiator (view from the inside);

7 is a lower radiator with a heat exchanger;

Fig - bottom radiator (view from the outside);

Fig.9 - the yoke of the magnetic circuit;

figure 10 - the core of the magnetic circuit;

11 - frameless coil on the rod;

12 is a view A of FIG. 11;

Fig - coil section;

Fig.14 - sleeve;

Fig - upper cup-insulator (view from the outside);

Fig - top cup insulator (view from the inside);

Fig - bottom cup insulator (view from the outside);

Fig. 18 is a bottom insulator cup (view from the inside);

Fig.19 - rack for mounting semiconductor valves.

The transformer rectifier high voltage (figure 1, 2, 3) contains:

- upper 1 and lower 2 radiators with heat exchangers 3 and 4 of liquid cooling;

- magnetic circuit, consisting of three equally spaced rods 6 clamped by two parallel yokes 5 (FIGS. 10, 11), each of which is covered by the primary and secondary windings;

- upper 7 and lower 8 insulator cups;

- connecting block 9;

- racks 10 with semiconductor valves fixed to them;

- fasteners 11.

The upper 1 (figure 1, 4, 5) and lower 2 (figure 1, 6, 7, 8) radiators are made of heat-conducting material in the form of horizontal panels having a central window 12; understatement 13 on the internal surfaces, designed for installation by the jar 5; channels 14 for accommodating liquid-cooled heat exchangers 3 and 4; holes 15 for fasteners 11.

Heat exchangers 3 and 4 of liquid cooling (FIGS. 1, 2, 7) can be made in the form of curved cylindrical tubes, fixed, for example, by soldering in the channels 14 of the upper 1 and lower 2 radiators. The tube of the heat exchanger 3 is fixed in the channel 14, made on the outer surface of the upper 1 radiator, and the tube of the heat exchanger 4 is on the inner surface of the lower 2 radiator. Heat exchangers 3 and 4 are connected to the liquid cooling system of the product by means of connecting flanges 16.

The magnetic circuit of the high-voltage transformer-rectifier is made of three equidistant rods 6, clamped by two parallel yokes 5, forming a closed spatial magnetic system. The magnetic circuit is installed between the upper 1 and lower 2 radiators, which are pulled together by means of fasteners 11, made, for example, in the form of studs with nuts (figure 1).

The yoke 5 of the magnetic circuit (Fig. 9) is made in the form of an equilateral triangle with rounded peaks and is commensurate with the understatements 13 made on the inner surface of the upper 1 and lower 2 radiators. Yarma 5 is installed in an understatement 13 on a heat-conducting compound.

The cores 6 of the magnetic circuit (figure 10) can be performed, for example, by a set of plates of different widths, forming steps along its side surface. Each rod 6 is surrounded by a concentrically arranged primary winding and a secondary winding divided into two or more sections.

The primary winding (Fig. 11, 12) can be made in the form of a single-row frameless coil 17 with a rectangular wire 18 mounted on a small rib to ensure compactness, with a uniform gap between the turns, which is filled with an insulator 19. Inside the frameless coils 17 are placed the cores 6 of the magnetic circuit and the gap between them is filled with an insulating heat-conducting compound 20. The connecting block 9 provides an electrical connection of the primary windings according to the "star" scheme.

The secondary winding is made in the form of a sectional coil, consisting of two or more multi-turn coils-sections 21 (Fig. 1) mounted on a sleeve 22 (Fig. 14). Each coil section 21 (Fig. 13) is made by winding the foil 23 onto a ring 24 of electrical insulation material, with an insulator 25 mounted on one of the end faces, and insulated on the outer surface by an insulating tape 26. The coil sections 21 are placed on the sleeve 22 so that the washer insulators 25 are directed either downward or upward, which allows for a compact secondary winding.

The sleeves 22 (Fig. 14) are made of an insulating material in the form of a cylindrical tube with inner conical surfaces 27 from the end sides to ensure the installation of the sleeves 22 on the nozzles 28 and 29 of the upper 7 and lower 8 insulator cups.

The upper 7 and lower 8 insulator cups (Figs. 15-18) are made in the form of an equilateral triangle with rounded vertices, side walls perpendicular to the base, and three equidistant pipes 28 and 29 located on the inner side of the base. While the pipes 28 of the upper cup-insulator 7 partially protrude from the outside of the base, providing additional electrical insulation and heat dissipation.

The outer surface of the nozzles 28 and 29, interacting with the sleeves 22, has the shape of truncated cones, commensurate with the inner conical surfaces 27 of the sleeves 22, which allows to provide the necessary density of their contact to ensure reliable electrical insulation.

Inside the sleeves 22 installed on the nozzles 28 and 29 of the upper 7 and lower 8 cups-insulators, the rods 6 of the magnetic circuit with the primary winding are placed. In this case, the side walls of the upper 7 and lower 8 cups-insulators cover the end parts of the secondary windings, which allows electrical insulation of the end parts of the secondary windings from the yoke 5, as well as additional insulation between the primary and secondary windings, thereby eliminating the surface breakdown that may occur during compact arrangement of structural elements of the high-voltage transformer-rectifier.

The side walls of the upper 7 and lower 8 cups-insulators (Fig-18) are made with protrusions 30 having grooves 31, which are used to install racks 10 with semiconductor valves fixed to them. Racks 10 (Fig. 19) are made in the form of rectangular plates with curved end surfaces 32, which ensure their installation in the grooves 31 of the upper 7 and lower 8 cups-insulators, and transverse shelves 33 for placement and fastening of semiconductor valves connected in pairs in series. This arrangement of semiconductor valves allows for efficient heat removal, which increases the reliability of their work.

The lower cup-insulator 8 (Fig.17) is made with a central pipe 34 in the form of an equilateral triangle located on the outside of the base. Through the Central pipe 34 are wires from semiconductor valves.

The assembly of the high voltage transformer rectifier is as follows.

Fix the tube of the heat exchanger 3 in the channel 14 by soldering on the outer surface of the upper 1 radiator, and the tube of the heat exchanger 4 on the inner surface of the lower 2 radiator. Install the yoke 5 of the magnetic circuit in an understatement 13 of the upper 1 and lower 2 radiators to a heat-conducting compound.

The primary windings are performed in the form of single-row frameless coils 17 with a rectangular wire 18 mounted on a small rib, providing a uniform gap between the turns. The gap is filled with insulator 19, for example, by winding an insulating cord with its subsequent impregnation. Place the rods 6 of the magnetic circuit inside the frameless coils 17 and fill the gap between them with an insulating heat-conducting compound 20.

Perform secondary windings in the form of sectional coils. To do this, perform coil sections 21 by winding foil 23 on a ring 24 of electrical insulation material, install the washer insulator 25 on one of the end faces and isolate it with tape 26 on the outer surface. Install the coil section 21 on the sleeve 22 so that the washer insulators 25 are directed either down or up.

Install sleeves 22 with coil sections 21 pa nozzles of the upper 7 and lower 8 cups-insulators. Install the rods 6 of the magnetic circuit with a primary winding inside the sleeves 22 through the nozzles of the upper cup-insulator 7. Connect the taps of the primary windings using the connecting block 9.

Install the assembled node between the yokes 5 of the magnetic circuit and tighten the upper 1 and lower 2 radiators using fasteners 11.

An example of using the claimed technical solution can be a small-sized transformer-rectifier used for powering a transmitter of electronic equipment.

The heat sink in this rectifier transformer is as follows. The terminals 6 of the magnetic circuit end-face interact with yokes 5 having good thermal contact with the upper 1 and lower 2 radiators, the cooling of which is ensured by the supply of coolant from the liquid cooling system of the product to the tubes of heat exchangers 3 and 4, fixed by soldering in the channels 14 of the upper 1 and bottom 2 radiators.

At the same time, the open design of the rectifier transformer contributes to the unhindered passage of air flows through its internal region, which allows for sufficient heat removal from the secondary winding and semiconductor valves.

Claims (5)

1. A high-voltage rectifier transformer, comprising upper and lower horizontal panels, a magnetic circuit with windings placed between them, semiconductor valves connected in pairs in series, characterized in that the upper and lower horizontal panels are made in the form of radiators with channels in which liquid-cooled heat exchangers are fixed; the magnetic core is made spatial, consisting of three equally spaced rods clamped by two parallel yokes, the yokes being installed in the recesses of the radiators on a heat-conducting compound, and the radiators are pulled together with fasteners; each rod is covered by concentrically arranged primary and secondary windings, while the rods with the primary winding are placed inside the sleeves, and the secondary windings are on the sleeves that are installed on the nozzles of the insulator cups; semiconductor valves are located on racks mounted on the side walls of the insulator cups. 2. The high-voltage rectifier transformer according to claim 1, characterized in that the liquid-cooled heat exchangers are made in the form of curved cylindrical tubes and are fixed in the channels of the upper and lower radiators by soldering. 3. The high-voltage rectifier transformer according to claim 1 or 2, characterized in that the liquid cooling heat exchangers are connected to the liquid cooling system of the product by means of connecting flanges. 4. The high-voltage rectifier transformer according to claim 1, characterized in that the primary winding is made in the form of a single row frameless coil with a rectangular wire mounted on a small rib, with a uniform gap between the turns filled with an insulator. 5. The high-voltage rectifier transformer according to claim 1, characterized in that the secondary winding is made in the form of a sectional coil consisting of two or more multi-turn coil sections mounted on a sleeve made with internal conical surfaces from the end sides.