RU188886U1 - RIGHT-INVERTER TRANSFORMER - Google Patents

Abstract

The utility model relates to power semiconductor converters of electrical energy, converting alternating current into direct current. The inventive rectifier-inverter converter is designed to power two DC traction motors installed on one chassis trolley of AC main electric locomotives. A technical problem is the creation of a rectifier-inverter converter with improved technical and operational characteristics. The technical results of the proposed utility model consist in increasing efficiency, reducing material consumption, reducing the complexity of manufacturing rectifier-inverter th transducer, as well as improving maintainability. The rectifier-inverter transducer includes a housing, an air duct, connecting current-conducting busbars, power input and output terminals, a terminal block, RC protection circuits, and pulse driver units. At the same time, eight groups of power elements are placed inside the air channel, which consist of N chains connected in parallel (n is a natural number, 2≤N≤4). Each of the circuits includes a thyristor unit, a reactor and a fast-acting fuse. On the inner side of the case are located and fixed the power supply and diagnostic unit.

Description

The utility model relates to power semiconductor converters of electrical energy, converting alternating current into direct current. The inventive rectifier-inverter converter is designed to power two traction DC motors installed on one chassis trolley of AC main electric locomotives.

Known rectifier-inverter converter (RU 105546, priority date 03/03/2011), comprising a housing, a power block made of thyristor blocks, an air cooling channel formed by thyristor blocks, resistors, resistor-capacitor circuits, status sensors of thyristor blocks, pulse-phase control units of thyristor blocks, conductive buses of AC and DC, terminal blocks, power block is made of eight equal shoulders of a single-phase rectifier located on four arms about an axis symmetry in height of the housing, with each shoulder of a single-phase rectifier made of n series-connected thyristor blocks and m parallel-connected thyristor blocks, with four arms of a single-phase rectifier forming the cathode group of a single-phase bridge located on one side of the converter housing, and the other four arms forming the anode group is on the opposite side of the converter housing, while the conductive AC and DC buses are arranged diagonally on The thyristor blocks of each of the eight shoulders, the output current-carrying DC busbars are located in the center of each side of the converter case in its lower part, and the input current-conducting AC busbars are located at the lower and upper corners of the converter case, interconnected at each corner of the converter case, on leveling resistors, protective resistor-capacitor circuits, thyristor state sensors and pulsed -phase control units thyristor blocks. In the converter, the power supply unit can be installed on the front side of the converter housing or in the air duct. In addition, two baffles can be installed in the upper part of the air channel of the converter. At the same time, a power supply unit can be additionally installed in the converter and two deflectors can be installed in the upper part of the air channel, and the power supply unit can be installed on the front side of the converter housing or in the air channel. In the converter, to control the reactive power compensation system, thyristor switches are inserted, which can be installed in the converter's air channel. In the upper part of the converter case, there are terminal blocks for connecting the power supply unit, the vehicle control system, and a connector for connecting the power supply unit shoulder diagnostics unit.

The disadvantages of the known rectifier-inverter converter are high released power losses in power semiconductor devices and potential equalization elements between series-connected thyristors, which leads to a decrease in efficiency, as well as the need to select power semiconductor devices for serial and parallel connection, which makes maintainability and leads to increase operating costs, in particular the consumption of materials and the complexity of manufacturing.

A technical problem is the creation of a rectifier-inverter converter with improved technical and operational characteristics, the design of which eliminates the indicated disadvantages.

The technical results of the proposed utility model are to increase efficiency, reduce material consumption, reduce the complexity of manufacturing a rectifier-inverter converter, as well as improve maintainability.

Technical results are ensured by the fact that the rectifier-inverter converter includes a housing, an air channel, connecting conductive buses, power input and output terminals, a terminal block, protective RC circuits, and pulse driver units. At the same time, eight groups of power elements are placed inside the air channel, which consist of N chains connected in parallel (n is a natural number, 2≤N≤4). Each of the circuits includes a thyristor unit, a reactor and a fast-acting fuse.

On the inner side of the case are located and secured power supply and diagnostic unit.

The housing of the rectifier-inverter converter can be made in the form of a welded housing made of sectional and sheet steel.

The air channel for cooling air is located vertically in the central part of the housing of the rectifier-inverter converter. In addition to eight groups of N parallel-connected circuits (n is a natural number, 2≤N≤4), there are also conductive buses inside the air channel connecting the circuits in such a way that a cathode group forms on one side of the body, and on the other side of the body anode transducer group.

The terminal block is designed to be connected to a microprocessor control system for the movement of an electric locomotive and is located in the upper part of the housing.

Protective RC circuits are installed on the side outer walls of the casing of the rectifier-inverter converter.

Blocks of pulse shapers, as well as power input and output pins are located on the front and rear panels of the case.

The rectifier-inverter converter may include from 4 to 8 blocks of pulse shapers.

The design of the rectifier-inverter converter allows it to be repaired without dismounting from an electric locomotive, and the units are housed in the housing with regard to ease of maintenance and installation during operation.

The applicant is not aware of the design of the rectifier-inverter converter, representing the combination of all the features that characterize the specified utility model, which indicates the novelty of the claimed object.

The claimed technical solution meets the requirement of industrial applicability, since it is intended for use in both newly manufactured and overhaul locomotives.

The utility model is illustrated by the figures:

Figure 1. Rectifier-inverter converter. Front view;

Figure 2. Rectifier-inverter converter.

Side view; Figure 3. Rectifier-inverter converter. View from above.

The figures depict:

1 - case;

2 - air channel;

3 - conductive tires;

4 - thyristor unit;

5 - reactor;

6 - high speed fuse;

7 - power input pins;

8 - power output conclusions;

9 - blocks of pulse shapers;

10 - terminal block;

11 - RC protective circuits;

12 - power supplies and diagnostics.

The rectifier-inverter converter contains a welded body 1, made of sectional and sheet steel. In the central part of the housing 1 there passes a vertical air duct 2 for cooling air. Inside the air channel 2 there are eight groups of power elements (not shown in the figures) and conductive tires 3. Moreover, four groups of power elements are installed on the front side of the case, and the other four are on the rear side.

Each group of power elements consists of four parallel-connected circuits (not shown in the figures) containing a thyristor unit 4, a reactor 5 and a fast-acting fuse 6.

The parallel connection of the thyristor units 4 together with the reactors 5 eliminates the need to select the power semiconductor elements in the circuit according to parameters, and also reduces the power loss of the thyristor units 4.

High-speed fuses 6 as part of the circuits protect the rectifier-inverter converter and ensure its operability when one of the thyristor blocks fails 4.

The thyristor unit 4 is a tablet thyristor mounted on a two-way radiator, having fastening elements and lead-in leads.

Conductive busbars 3, connect the circuit in such a way that on the one side of the case a cathode group is formed, and on the other side of the case an anodic group of the converter is formed.

Power input pins 7 are designed to be connected to a source of input AC current, and output pins 8 are used to connect smoothing reactors and traction motors.

On the front and rear panels of the housing 1 of the rectifier-inverter converter are eight blocks of pulse shapers 9. In the upper part of the housing 1 there is a terminal block 10 for connection to the microprocessor control system for the movement of an electric locomotive. Protective RC circuits 11 are installed on the lateral external walls of the case, and a power supply unit and a diagnostic unit 12 are fixed on the lateral internal walls of the case.

The operation of the proposed technical solution is as follows. The converter is mounted in the high-voltage electric locomotive chamber, the input power leads 7 are connected to the secondary windings of the electric locomotive transformer, the output power leads 8 are connected to the electric locomotive chassis trolley motors and smoothing reactors, and connect the terminal block 10 from the microprocessor control system of the electric locomotive. After connecting to the contact network and the appearance of voltage at the terminals of the secondary winding of the converter transformer of an electric locomotive, at the driver’s command, control inputs from the microprocessor-based electric locomotive motion control system to the inputs of the pulse shaper unit 9. After amplification in power, the signals arrive at the thyristor blocks 4, which become conductive. As a result, the output pins 8 voltage appears, the value of which is set by the control system of motion of the locomotive. Monitoring the health of high-speed fuses 6 is carried out by the diagnostic unit. In case of breakdown of the high-speed fuse 6, the diagnostic unit transmits a signal with the number of the blown fuse 6 to the microprocessor control system of the locomotive movement.

Thus, increasing efficiency, reducing material consumption, reducing the complexity of manufacturing the converter and improving maintainability are achieved due to the fact that the rectifier-inverter converter contains a housing, connecting conductive buses, power input and output pins, a terminal block, protective RC circuits, pulse driver units and an air channel inside which eight groups of power elements are placed, consisting of N parallel-connected circuits (n is a natural number, 2≤N≤4), each of which includes em thyristor unit.

Claims (2)

1. The rectifier-inverter converter, comprising a housing, an air channel, connecting conductive buses, power input and output terminals, a terminal block, protective RC circuits, pulse driver units, characterized in that eight groups of power elements are placed inside the air channel N circuits connected in parallel (n is a natural number, 2≤N≤4), each of which includes a thyristor unit, a reactor and a fast-acting fuse. 2. The rectifier-inverter converter according to claim. 1, characterized in that the power supply and diagnostic unit are located and secured on the inner side of the case.

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