RU2375213C1 - Voltage control unit for passenger carriages - Google Patents

Abstract

FIELD: energetics. ^ SUBSTANCE: invention is designed for the conversion of alternating voltage taken from the independent undercar generator or from the step-down three-phase transformer of the station network or board train line into the supply voltage of the passenger carriage users, and can be used in power supply for all users of the locomotive-hauled passenger carriage. The control unit provides for the power supply of air-conditioning, heating, ventilation, lighting and other systems as well as for recharging of the accumulator storage batteries of the passenger carriage. The voltage control unit for passenger carriages comprises an input part for the rectification of AC input three-phase voltage into the DC stabilised voltage at the output and a low-voltage output part for the stabilisation of the voltage at the level sufficient for the carriage users' power supply and for ensuring optimal charging rate of the carriage accumulators. All devices included in the unit are mounted on plates and are set in a casing. The input part is a low-voltage one and comprises the first and the second rectifier bridges consisting of the fist and second AC/DC converters, input of the first one is connected to the undercar electric generator through a safety device; input of the second one - to the step-down three-phase transformer of the station supply network. Their outputs are combined and the voltage is used for the power supply of respectively the first and the second DC/DC converters the outputs of which are also combined and connected to the power output terminals used for the connection of load and accumulator charging circuits and through an isolation diodes assembly to the additional third DC/DC converter which is used for the control of the generator excitation winding current to obtain the required voltage from its output. The first, second and third DC/DC converters through a CAN bar are connected to the external unit for the diagnostics and protection of electrical equipment, displaying state and working modes, information exchange with automatics devices. The control unit is placed in a casing consisting of a main housing, a front door, a rear door in the form of a radiator and an additional housing. The following units are set inside the casing: a control board set on poles at an angle and basic plates - on the lower housing surface; power elements - on the rear wall; protection elements, fittings for power and signal cables and terminals for their connection - on the side housing walls; a throttle block - on the upper surface. ^ EFFECT: providing for the specified output parametres. ^ 3 dwg

Description

The invention relates to converting electrical devices and is intended for converting an alternating voltage removed from an autonomous carriage generator or from a three-phase step-down transformer of a station network or an on-board train line to the power supply voltage of consumers of a passenger car, and can be used in a system for providing electricity to all consumers of a passenger car of locomotive traction . The voltage control unit for passenger cars (hereinafter referred to as the control unit) provides power to the air conditioning, heating, ventilation and lighting systems, etc., as well as charging batteries for the passenger car.

As an analogue, consider the standard BLS module that is part of the Siemens Transportation Systems SIBEST converter. The BLS module is a unified unit that serves to power the DC circuits of a passenger car and charge batteries. The 560 V BLS module is powered by an intermediate DC link from the SIBEST converter.

The disadvantage of this module is that it can only work as part of a SIBEST converter, since it requires constant voltage to power it.

There are domestic developments of similar converting equipment for transport, which are implemented in accordance with modern requirements for power supply devices for passenger cars.

The company ELSIEL CJSC produces a voltage limiter - voltage stabilizer (OSV) for limiting and stabilizing the input DC voltage of 110 ... 170 V to the output voltage of 110 V for supplying responsible consumers of a railway carriage (Materials of the 2nd International Exhibition of Modern Products, New Technologies and Services railway transport "ExpoRail 2007", the Internet site www.exporail.ru).

The disadvantage of this analogue, as in the above example, is that it needs a constant voltage to power it, which can only be obtained from the 110 V train bus or from an additional AC / DC converter.

As the second analogue, we consider the VZR-80 charge-discharge rectifier of the company ELSIEL CJSC. The VZR-80 charge-discharge rectifier is designed to charge and discharge various types of rechargeable batteries, for example 90KL250P or 56PzS (M) -350P, and can be used to service rechargeable batteries wagon batteries in passenger depots. In the discharge mode of the battery, the energy received is returned to the network. VZR-80 incorporates a step-down transformer, a controlled rectifier and an output LC filter. The required control laws and control algorithms, as well as the settings, protection and indication functions are implemented by the control system.

The disadvantages of this analogue are stringent requirements for voltage and frequency of the supply network.

The closest to the claimed invention in terms of essential features and functionality is a high-voltage voltage converter for passenger cars (patent RU No. 2282933, priority 07.09.2004), containing a high-voltage input and low-voltage output parts, in which the high-voltage input part is connected to the terminals the main train bus, designed to convert direct or alternating voltage to the supply voltage of consumers of passenger cars, and also provides work gregatov battery charging.

The disadvantage of this converter is that it only works on the main train bus.

The technical result of the claimed invention is to provide the specified output parameters of the control unit when powered from different AC sources in a wide range of voltage and frequency.

The technical result is achieved by the fact that the control unit contains a low-voltage input part, which rectifies the input three-phase AC voltage into a constant stabilized output voltage using a two-channel pulse DC / DC pulse converter, and a low-voltage output part, which stabilizes the voltage at a level sufficient for supply consumers of the car, and provides the optimal charge current of car batteries. In addition, with the help of an additional DC / DC converter, the field current is controlled to obtain the desired generator voltage.

Structurally, the control unit contains the first and second three-phase rectifier bridges, consisting of the first and second AC / DC converters, the input of the first, through a protective device, is connected to the car generator and the second to the step-down three-phase transformer of the station supply network. The outputs of the first and second rectifier bridges are combined, and the voltage is used to power the first and second DC / DC converters, the outputs of which are also combined and connected to the power output terminals used to connect the load and battery charge circuits, and through the assembly of decoupling diodes to an additional third a DC / DC converter, which controls the current of the field winding of the generator to obtain the required voltage from its output, which increases the functionality awns adjusting unit, first, second and third DC / DC converters for CAN bus connected to an external device for diagnosing and protection of electrical equipment, the display state and operating modes, exchanges information with automation. Moreover, the control unit is located in the housing, consisting of the main casing, the front door and the rear wall in the form of a radiator and an additional casing. The control panel mounted on the racks at an angle corresponding to the optimal angle of view and the main boards are located on the bottom surface of the casing, power elements are located on the rear wall, fuses, pipes for supplying power and signal cables and terminals for them are on the side walls of the casing connection, and on the top surface - a block of chokes.

Figure 1 shows a structural diagram of a voltage control unit for passenger cars. Figure 2 shows a drawing of a voltage control unit for passenger cars: front view, top view. Figure 3 shows a drawing of a voltage control unit for passenger cars: view of the inner upper surface, view of the inner side wall.

Figure 1 shows the structural diagram of the voltage control unit for passenger cars, containing input connecting devices 1 and 2 of external energy sources to the control unit, a protective device 3, consisting of an indicator of the presence of phases and a block of high-speed fuses, the first AC / DC converter 4 and the second AC / DC converter 5, the outputs of which are combined and fed to the inputs of the first and second DC / DC converters 6 and 7, respectively, protection elements 8 and 9 in the form of fuses and power output terminals 10 and 11, fail Single decoupling diode 12, the third DC / DC converter 13 and the output terminal 14 for connection to the excitation winding undercar generator.

The control unit is located in a metal casing (see Fig. 2), structurally it consists of a main casing 15, an opening front door 16, a rear wall 17 in the form of a radiator and an additional casing 18 located on the side wall of the main casing 15. A door 16 is installed the lock 19, which prevents unauthorized access, and the presence of a sealing strip 20 around the perimeter of the door 16 and the clamping elements 21 provides sealing of the control unit.

Inside the housing on the lower surface of the main casing 15 on the common screen 22 are a control panel 23 mounted on the racks 24 at an angle corresponding to the optimal angle of view for displaying information and issuing commands, and main boards 25 constituting the control unit. This design provides unhindered access and allows for the repair or replacement of an electrical circuit to change both individual elements and the entire board assembly. To the rear wall 17 from the inside, on the thin layer of heat-conducting paste or heat-conducting gaskets, power elements 26 are installed and fastened with screws, which ensures the most efficient heat removal. Pipes 27 are installed on the side walls of the main casing 15, and fuses 29 are also installed on the inner side of the terminal 28 for supplying and connecting power and signal cables. Pipes 30 are installed on the additional casing 18 for supplying the excitation wires and the working winding of the generator. The choke block 31 is attached to the upper surface of the casing 15 from the inside, this design provides additional heat dissipation and quick replacement of the entire choke block during repair.

The control unit operates as follows.

Using connecting devices 1 or 2, the control unit is connected to the outputs of a three-phase subcar car alternator or to a step-down 380V / 88V three-phase transformer of a station supply network, respectively. From the terminals of the connecting device 1, the voltage of the generator is supplied to the input of the protective device 3, consisting of an indicator of the presence of phases and a block of high-speed fuses. From the output of the protective device 3, the voltage goes to the input of the first AC / DC converter 4. Similarly, from the terminals of the connecting device 2, the voltage of the transformer goes to the input of the second AC / DC converter 5. The first and second AC / DC converters 4 and 5 are three-phase rectifier bridges with capacitive filters, direct voltage from their outputs goes to the inputs of the first and second DC / DC converters 6 and 7, from the outputs of which through protective devices 8 and 9 the output voltage goes to the power output terminals their consumer device 10 and the battery 11. This is done to maintain the established battery charge parameters 11 with the required accuracy.

The third DC / DC converter 13 receives power from the outputs of the first and second AC / DC converters 4 and 5 or from the outputs of the DC / DC converters 6 and 7, or, in the absence of external supply voltages, from the car battery 11 and through the assembly of decoupling diodes 12 transmitted to the power output terminals of the connecting device 14, and then to the field winding of the car generator.

The first, second, and third DC / DC converters 6, 7, and 13 are connected via CAN to an external device that is part of locomotive automation, providing data on the state and operation mode, exchanging information, and performing diagnostics and protection of electrical equipment.

The presence of these essential features allows the use of a voltage control unit with a significant variation in the voltage values of the supply networks.

Claims (1)

The voltage regulation unit for passenger cars, containing the input part, which rectifies the input three-phase AC voltage into a constant stabilized output voltage, and the low-voltage output part, which stabilizes the voltage at a level sufficient to power the consumers of the car and provides the optimal charge current of car batteries, all the devices included in the unit are located on the boards and installed in the housing, characterized in that the input part is low-voltage and it contains the first and second three-phase rectifier bridges, consisting of the first and second AC / DC converters, the input of the first through a protective device is connected to a subcar generator and the second to a step-down three-phase transformer of the station supply network, the outputs of which are combined, and the voltage is used to power the first and a second DC / DC converter, the outputs of which are also combined and connected to the power output terminals used to connect the load and battery charge circuits, also through the assembly of decoupling diodes to an additional third DC / DC converter, which controls the generator field current to obtain the required voltage from its output, the first, second and third DC / DC converters are connected via CAN to an external device for diagnostics and protection of electrical equipment, display of the state and operating modes, information exchanges with automation, while the control unit is located in the housing, consisting of the main casing, front door, rear wall in the form of a diator and an additional casing, inside the casing are located: on the lower surface of the casing a control panel mounted on racks at an angle, and main boards, on the back wall - power elements, on the side walls of the casing - protection elements, pipes for supplying power and signal cables and terminals to connect them, and on the upper surface - a block of chokes.

Images