A current conversion device and a method of mounting the same

Abstract

The application relates to a variable current device and a mounting method thereof. The variable current device comprises an input cavity, which is suitable for connecting a direct current high-voltage power supply and is provided with a space and an interface of a charging short-circuit unit; a filter inductance cavity, which is provided with a space and an interface of a filter inductance; a module and a control unit cavity, which is provided with a space and an interface of a support capacitor and a space and an interface of an inverter unit; and an output cavity, which is suitable for connecting a motor load and is provided with a space and an interface of an output isolation contactor. The application can realize platform development on the architecture of the variable current device.

Description

Technical Field

[0001] This invention relates to the field of power conversion in urban rail transit, and more particularly to an integrated and platform-based power conversion device, as well as a method for installing the power conversion device. Background Technology

[0002] With the rapid development of urban rail transit, urban rail vehicles need to continuously pursue lightweight and high efficiency. Therefore, higher demands are being placed on onboard converter devices for integration, lightweighting, and miniaturization, with the aim of achieving superior functionality and performance while reducing weight and size. Simultaneously, to improve maintenance efficiency and accuracy and reduce maintenance costs, higher requirements are being placed on intelligent operation and maintenance (Prognostics Health Management, PHM).

[0003] Based on the application requirements of urban rail transit, traction converters can be classified according to load type into asynchronous system converters and permanent magnet system converters; according to output-side control method into vehicle-controlled, frame-controlled, and axle-controlled methods; according to input-side control method into vehicle-controlled and frame-controlled methods; and according to hoisting interface into beam-supported, hook-suspended, and side-beam-supported methods. Additionally, traction converters also have requirements regarding power rating, clearance dimensions, and physical property management (PHM) specifications.

[0004] For permanent magnet traction systems, the need for output-side shaft control and the installation of output isolation contactors inevitably increases the complexity and number of components in the converter unit, resulting in a significant discrepancy between the converter unit's weight and size specifications and the ideal requirements for the entire vehicle. For asynchronous frame-controlled traction systems, to increase system redundancy, frame control is used on both the input and output sides, which inevitably increases the number and size of converter modules, contactors, and reactors, leading to a larger overall weight and size for the converter unit. If these requirements were considered independently and developed in a customized manner, it would inevitably result in a wide variety of products and high development costs.

[0005] To meet more personalized needs and reduce the variety of products, this invention provides an integrated and platform-based converter device and an installation method for the converter device, which is used for platform-based development of the converter device architecture. Summary of the Invention

[0006] The following provides a brief overview of one or more aspects to offer a basic understanding of them. This overview is not an exhaustive summary of all conceived aspects, nor is it intended to identify key or decisive elements of all aspects, nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form to prepare for the more detailed descriptions that follow.

[0007] To meet more personalized needs and reduce the variety of products, this invention provides an integrated and platform-based converter device and an installation method for the converter device, which is used for platform-based development of the converter device architecture.

[0008] The converter device provided by the present invention includes: an input cavity, suitable for connecting to a DC high-voltage power supply, and having a space and interface for a charging short-circuit unit; a filter inductor cavity, having a space and interface for a filter inductor; a module and control unit cavity, having a space and interface for a supporting capacitor and a space and interface for an inverter unit; and an output cavity, suitable for connecting to a motor load, and having a space and interface for an output isolation contactor.

[0009] Optionally, in some embodiments of the present invention, the input cavity may have space and interface for two charging short-circuit units, the filter inductor cavity may have space and interface for two filter inductors, and the module and control unit cavity may have space and interface for two supporting capacitors and space and interface for two inverter units. In input vehicle control mode, the input cavity may have one charging short-circuit unit, the filter inductor cavity may have one filter inductor, and the module and control unit cavity may have one supporting capacitor and one inverter unit. In input frame control mode, the input cavity may have two charging short-circuit units, the filter inductor cavity may have two filter inductors, and the module and control unit cavity may have two supporting capacitors and two inverter units. In permanent magnet traction output shaft control mode, the output cavity may have the output isolation contactor installed between the inverter unit and the motor load. In asynchronous traction output driving control mode, the inverter unit may be directly connected to the motor load.

[0010] Preferably, in some embodiments of the present invention, the converter may include four inverter units for supplying power to the four motor loads. In the input vehicle control mode, the four inverter units may be installed as one circuit, powered by one supporting capacitor. In the input rack control mode, the four inverter units may be installed as two circuits, powered by two separate supporting capacitors.

[0011] Optionally, in some embodiments of the present invention, the converter may further include a control unit, installed in the module and control unit cavity, wherein the module and control unit cavity may only have space and interface for the control unit. The control unit may be communicatively connected to the charging short-circuit unit, the inverter unit, and an external control port, and is configured to: close the charging short-circuit unit to charge the corresponding supporting capacitor according to the control signal of the control port, and control the inverter unit to output three-phase AC power with adjustable voltage and frequency according to the control signal of the control port.

[0012] Preferably, in some embodiments of the present invention, the control unit may also be communicatively connected to the output isolation contactor and configured to: close the output isolation contactor to provide the three-phase AC power to the corresponding motor load according to the control signal of the control port.

[0013] Optionally, in some embodiments of the present invention, the inverter unit may also include a chopper unit connected to an absorption resistor. The control unit may also be communicatively connected to the chopper unit and further configured to: in response to excessive voltage or the rail vehicle being in braking condition, control the chopper unit to output excess energy to the absorption resistor.

[0014] Optionally, in some embodiments of the present invention, in an independent input and output control mode, the converter may include two control units. At least one of the two control units may be installed in the output cavity. The two control units may be communicatively connected to one of the charging short-circuit units, one of the inverter units, and an external control port, respectively, and are configured to: close the corresponding charging short-circuit unit to charge the corresponding supporting capacitor according to the control signal of the control port, and control the corresponding inverter unit to output three-phase AC power with adjustable voltage and frequency according to the control signal of the control port.

[0015] Optionally, in some embodiments of the present invention, the converter may further include a separate fan chamber, wherein a cooling fan is installed in the fan chamber.

[0016] Preferably, in some embodiments of the present invention, the converter may further include a fault prediction and health management module, which is installed in the module and control unit cavity and / or the fan cavity. The fault prediction and health management module installed in the module and control unit cavity is adapted to receive and process the status signals of the converter for intelligent operation and maintenance. The fault prediction and health management module installed in the fan cavity is adapted to detect the current and voltage of the cooling fan and provide feedback.

[0017] Optionally, in some embodiments of the present invention, the converter may further include a cabinet. The input cavity, the filter inductor cavity, the module and control unit cavity, the output cavity, and the fan cavity may be integrated into the cabinet. The filter inductor may be a miniaturized filter inductor, and the output isolation contactor may be a miniaturized output isolation contactor.

[0018] Optionally, in some embodiments of the present invention, the converter may further include a detachable suspension structure. The suspension structure includes beam-supporting lugs, hook-hanging lugs, and side beam-supporting lugs, and is adapted to be fitted with appropriate lugs according to the suspension method of the converter.

[0019] According to another aspect of the invention, a method for installing a converter is also provided herein.

[0020] The installation method of the above-mentioned converter device provided by the present invention includes the following steps: connecting the input cavity to a DC high-voltage power supply, wherein the input cavity is provided with a space and interface for a charging short-circuit unit; in the input vehicle control mode, installing one of the charging short-circuit units into the input cavity, installing one filter inductor into the filter inductor cavity, and installing one support capacitor and one inverter unit into the module and control unit cavity, wherein the filter inductor cavity is provided with a space and interface for the filter inductor, and the module and control unit cavity is provided with a space and interface for the support capacitor and the inverter unit; and connecting the output cavity to a motor load, wherein the output cavity is provided with a space and interface for an output isolation contactor.

[0021] Optionally, in some embodiments of the present invention, the input cavity may have space and interface for two charging short-circuit units, the filter inductor cavity may have space and interface for two filter inductors, and the module and control unit cavity may have space and interface for two supporting capacitors and space and interface for two inverter units. The installation method may further include the following steps: in input frame control mode, installing two charging short-circuit units into the input cavity, installing two filter inductors into the filter inductor cavity, and installing two supporting capacitors and two inverter units into the module and control unit cavity; and / or in permanent magnet traction output shaft control mode, installing an output isolation contactor into the output cavity, wherein the output cavity has space and interface for the output isolation contactor, and the output isolation contactor is installed between the inverter unit and the motor load; and / or in asynchronous traction output driving control mode, directly connecting the inverter unit to the motor load.

[0022] Preferably, in some embodiments of the present invention, the installation method may further include the steps of: in the input vehicle control mode, installing the four inverter units as one circuit, and powering the four inverter units with the one circuit support capacitor, wherein the four inverter units are used to supply power to the four motor loads; and in the input frame control mode, installing the four inverter units as two circuits, and powering the four inverter units with the two circuit support capacitors respectively.

[0023] Optionally, in some embodiments of the present invention, the installation method may further include the steps of: installing a control unit in the module and control unit cavity, wherein the module and control unit cavity have only one space and interface for the control unit; and communicating the control unit with the charging short-circuit unit, the inverter unit and an external control port, wherein the control unit is configured to: close the charging short-circuit unit to charge the corresponding support capacitor according to the control signal of the control port, and control the inverter unit to output three-phase AC power with adjustable voltage and frequency according to the control signal of the control port.

[0024] Preferably, in some embodiments of the present invention, the installation method may further include the step of: communicating the control unit with the output isolation contactor, wherein the control unit is further configured to: close the output isolation contactor to provide the three-phase AC power to the corresponding motor load according to the control signal of the control port.

[0025] Optionally, in some embodiments of the present invention, the inverter unit may also include a chopper unit. The installation method may further include the steps of: connecting the chopper unit to an absorption resistor; and communicating the control unit to the chopper unit, wherein the control unit is further configured to: in response to excessive voltage or the rail vehicle being in braking condition, control the chopper unit to output excess energy to the absorption resistor.

[0026] Optionally, in some embodiments of the present invention, the installation method may further include the steps of: installing at least one of the two control units in the output cavity in an independent input and output rack control mode; and communicatingly connecting the two control units to one of the charging short-circuit units, one of the inverter units, and an external control port, respectively, wherein the two control units are respectively configured to: close the corresponding charging short-circuit unit to charge the corresponding support capacitor according to the control signal of the control port, and control the corresponding inverter unit to output three-phase AC power with adjustable voltage and frequency according to the control signal of the control port.

[0027] Optionally, in some embodiments of the present invention, the installation method may further include the step of installing a cooling fan in a separate fan chamber.

[0028] Preferably, in some embodiments of the present invention, the installation method may further include the step of: installing a fault prediction and health management module in the module and control unit cavity and / or the fan cavity, wherein the fault prediction and health management module installed in the module and control unit cavity is adapted to receive and process the status signal of the converter for intelligent operation and maintenance, and the fault prediction and health management module installed in the fan cavity is adapted to detect the current and voltage of the cooling fan and provide feedback.

[0029] Optionally, in some embodiments of the present invention, the installation method may further include the steps of: integrating the input cavity, the filter inductor cavity, the module and control unit cavity, the output cavity and the fan cavity into a cabinet; selecting a miniaturized filter inductor as the filter inductor; and selecting a miniaturized output isolation contactor as the output isolation contactor.

[0030] Optionally, in some embodiments of the present invention, the installation method may further include the steps of: selecting a suitable suspension structure according to the suspension method of the converter, the suspension structure including a crossbeam support lug, a hook suspension lug, and a side beam support lug; and detachably installing the suitable suspension structure onto the converter. Attached Figure Description

[0031] The above-described features and advantages of the present invention will be better understood after reading the following detailed description of embodiments of the present disclosure in conjunction with the accompanying drawings. In the drawings, components are not necessarily drawn to scale, and components having similar related characteristics or features may have the same or similar reference numerals.

[0032] Figure 1 A schematic diagram of the architecture of a converter device provided according to some embodiments of the present invention is shown.

[0033] Figure 2 A schematic flowchart of an installation method for a converter device according to some embodiments of the present invention is shown.

[0034] Figure 3 A circuit diagram of a converter in input vehicle control mode provided according to some embodiments of the present invention is shown.

[0035] Figure 4 A circuit diagram of a converter in input driving mode provided according to some embodiments of the present invention is shown.

[0036] Figure 5 A circuit diagram of a converter device in output shaft control mode for permanent magnet traction provided according to some embodiments of the present invention is shown.

[0037] Figure 6A circuit diagram of a converter in output driving mode for asynchronous traction is shown, according to some embodiments of the present invention.

[0038] Figures 7A-7C A schematic diagram of a suspension structure provided according to some embodiments of the present invention is shown. Detailed Implementation

[0039] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention is presented in conjunction with preferred embodiments, this does not mean that the features of the invention are limited to these embodiments. On the contrary, the purpose of describing the invention in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of the present invention. To provide a thorough understanding of the invention, many specific details will be included in the following description. The invention may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of the invention, some specific details will be omitted in the description.

[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] Furthermore, the terms "upper," "lower," "left," "right," "top," "bottom," "horizontal," and "vertical" used in the following description should be understood as the orientations shown in the relevant paragraphs and accompanying drawings. These relative terms are for illustrative purposes only and do not imply that the described apparatus must be manufactured or operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0042] It is understood that although terms such as "first," "second," and "third" may be used herein to describe various components, regions, layers, and / or parts, these components, regions, layers, and / or parts should not be limited by these terms, and these terms are only used to distinguish different components, regions, layers, and / or parts. Therefore, the first components, regions, layers, and / or parts discussed below may be referred to as second components, regions, layers, and / or parts without departing from some embodiments of the present invention.

[0043] To meet more personalized needs and reduce the variety of products, this invention provides an integrated and platform-based converter device and an installation method for the converter device, which is used for platform-based development of the converter device architecture.

[0044] Please refer to Figure 1 , Figure 1 A schematic diagram of the architecture of a converter device provided according to some embodiments of the present invention is shown.

[0045] like Figure 1 As shown, the converter 10 provided by the present invention includes an input cavity 11, a filter inductor cavity 12, a module and control unit cavity 13, and an output cavity 14. The input cavity 11 is adapted to connect to a front-end DC high-voltage power supply and has space and interfaces for two charging short-circuit units. The filter inductor cavity 12 has space and interfaces for two filter inductors. The module and control unit cavity 13 has space and interfaces for two supporting capacitors and two inverter units. The output cavity 14 is adapted to connect to a rear-end motor load and has space and interfaces for an output isolation contactor.

[0046] By reserving space and interfaces for two charging short-circuit units in the input cavity 11, space and interfaces for two filtering inductors in the filter inductor cavity 12, space and interfaces for two supporting capacitors and two inverter units in the module and control unit cavity 13, and space and interfaces for an output isolation contactor in the output cavity 14, the cabinet of the above-mentioned converter device 10 provided by the present invention has the characteristics of integration and platformization, and can meet the configuration requirements of various control modes of rail vehicles.

[0047] In some embodiments, the cavities 11-14 of the converter 10 can be independent and electromagnetically isolated from each other, thereby meeting the high and low voltage isolation requirements, classified wiring requirements, and electromagnetic compatibility requirements of the internal wiring of the converter 10. In some embodiments, the input cavity 11 and the output cavity 14 can be integrated at the bottom of the converter 10 cabinet to ground their cavity shells, thereby preventing electric shock injuries caused by leakage of internal high-voltage devices. The filter inductor cavity 12 can be integrated in the middle of the converter 10 cabinet, adjacent to the input cavity 11, to facilitate the electrical connection between the charging short-circuit unit and the filter inductor. The module and control unit cavity 13 can be integrated at the top of the converter 10 cabinet, adjacent to the filter inductor cavity 12, to facilitate the electrical connection between the filter inductor and the supporting capacitor. Figure 1 The layout architecture shown in this invention conforms to the principle that the component layout order is consistent with the energy flow direction, while also ensuring that the external interfaces and internal wiring meet the electromagnetic compatibility requirements for high and low voltage isolation and classified wiring.

[0048] like Figure 1As shown, in some embodiments, the converter 10 may further include a separate fan chamber 15 for mounting a cooling fan. In some embodiments, the fan chamber 15 may be located in the middle of the converter 10 cabinet, adjacent to the other chambers 11-14 of the converter 10, to improve the cooling effect of the converter 10 cooling system.

[0049] The following examples of installation methods for power converters will illustrate the integration and platform features of the power converter 10. Those skilled in the art will understand that these installation methods are merely non-limiting embodiments, primarily intended to clearly demonstrate the concept of the invention and provide ways to facilitate public implementation, rather than to limit the scope of protection of the invention.

[0050] Please refer to Figure 2 , Figure 2 A schematic flowchart of an installation method for a converter device according to some embodiments of the present invention is shown.

[0051] like Figure 2 As shown, the installation method of the above-mentioned converter provided by the present invention may include the step of connecting the input cavity 11 to a DC high voltage power supply.

[0052] In some embodiments of the present invention, the DC high-voltage power supply for supplying power to the traction converter 10 can be a 1500V DC high-voltage positive and negative line. By connecting the input cavity 11 to the DC high-voltage power supply, the traction converter 10 can obtain DC high-voltage electricity from the 1500V DC high-voltage positive and negative line and convert the high-voltage DC input into AC three-phase output, thereby supplying power to the motor of the rail vehicle.

[0053] like Figure 2 As shown, the installation method of the converter device provided by the present invention may further include the step of: determining the input control mode and output control mode of the converter device.

[0054] As described above, the traction converter 10 can be classified into asynchronous system converters and permanent magnet system converters according to load type, and into vehicle-controlled, bogie-controlled, and axle-controlled modes according to output-side control method, and into vehicle-controlled and bogie-controlled modes according to input-side control method. Vehicle control refers to synchronous control of all four motors of the vehicle. Bogie control allows for independent synchronous control of two motors in each bogie. Axle control allows for independent control of each motor. The traction motor for permanent magnet traction is a permanent magnet synchronous motor. The traction motor for asynchronous traction is an asynchronous motor. In some embodiments, installers can install corresponding circuit configurations in the integrated and platform-based cabinet according to the actual input and output control modes of the traction converter 10 to meet the converter function requirements of the traction converter 10.

[0055] Please refer to Figures 3 to 6 . Figure 3 A circuit diagram of a converter in input vehicle control mode provided according to some embodiments of the present invention is shown. Figure 4 A circuit diagram of a converter in input driving mode provided according to some embodiments of the present invention is shown. Figure 5 A circuit diagram of a converter device in output shaft control mode for permanent magnet traction provided according to some embodiments of the present invention is shown. Figure 6 A circuit diagram of a converter in output driving mode for asynchronous traction is shown, according to some embodiments of the present invention.

[0056] like Figure 2 and Figure 3 As shown, in some embodiments, when the rail vehicle is suitable for configuring a traction converter 30 with permanent magnet traction, output axle control, and input vehicle control, the installer can install a charging short-circuit unit 31 into the input cavity 11 of the traction converter 30, install a filter inductor 32 into the filter inductor cavity 12, and install a support capacitor 33 and an inverter unit 34 into the module and control unit cavity 13.

[0057] The charging short-circuit unit 31 can be a charging short-circuit contactor KM1. One end of the charging short-circuit contactor KM1 is connected to the 1500V DC high-voltage positive and negative lines, and the other end is connected to the filter inductor 32 installed in the filter inductor cavity 12. The charging short-circuit contactor KM1 is adapted to disconnect to cut off the power supply of the 1500V DC high-voltage positive and negative lines to the traction converter 30, or to close to conduct the power supply of the 1500V DC high-voltage positive and negative lines to the traction converter 30.

[0058] like Figure 3 As shown, in some embodiments, the traction converter 30 may be configured with four inverters to supply power to four motor loads 35. In this embodiment of input vehicle control, by installing the four inverters as one circuit, the converter 30 can supply power to the four inverters through one supporting capacitor 33.

[0059] In this embodiment of permanent magnet traction, the installer can install four output isolation contactors 36 into the output chamber 14 of the traction converter 30. These four output isolation contactors 36 can be installed between the four inverters and their corresponding motor loads 35, respectively, and are adapted to disconnect to cut off the power supply from the inverter unit 34 to the permanent magnet synchronous motor load 35, or to close to connect the power supply from the inverter unit 34 to the permanent magnet synchronous motor load 35.

[0060] In some embodiments, the filter inductor 32 and the output isolation contactor 36 are preferably miniaturized devices. By using integrated converter modules 11-15, miniaturized filter reactor 32, and miniaturized isolation contactor 36, the present invention can achieve overall miniaturization and weight reduction of the device.

[0061] This is used to achieve the lightweighting and miniaturization of the converter 30.

[0062] like Figure 3 As shown, in some embodiments, the traction converter 30 may further include a control unit 37. This control unit may be a traction control unit (DCU). The installer may install the DCU control unit 37 in the module and control unit cavity 13, and communicate with the charging short-circuit unit 31 and each inverter unit 34 respectively, and communicate with an external control port through the control port.

[0063] In response to the control signal from the control port, the DCU control unit 37 can first control the charging short-circuit unit 31 to close to charge the supporting capacitor of the intermediate circuit. Then, in response to the control signal from the control port, the DCU control unit 37 can control each inverter to operate sequentially, converting the DC power filtered by the filter inductor 32 and the supporting capacitor 33 into three-phase AC power with adjustable voltage and frequency, and outputting it to the corresponding output isolation contactor 36. Subsequently, in response to the control signal from the control port, the DCU control unit 37 can also control the designated output isolation contactor 36 to close, providing the three-phase AC power with adjustable voltage and frequency to the corresponding motor load 35.

[0064] like Figure 3 As shown, in some embodiments, installers can install two inverters with chopper units 341 into the module and control unit cavity 13 of the traction converter 30, and connect the chopper units 341 to the absorption resistor 342 and communicatively connect them to the DCU control unit 37. In response to an excessively high input voltage of the inverter unit 34 or when the rail vehicle is braking, the DCU control unit 37 can turn on the chopper unit 341 to output excess energy to the absorption resistor 342, thereby allowing the absorption resistor 342 to absorb the excess energy for overvoltage protection.

[0065] In some embodiments, installers may also install a cooling fan 39 into the fan chamber 15 of the traction converter 30 to simultaneously cool the filter inductor 32, the inverter unit 34, and the chopper unit 341.

[0066] like Figure 2 and Figure 4 As shown, in some embodiments, when the rail vehicle is suitable for configuring a traction converter 40 with permanent magnet traction, output shaft control, and input frame control, the installer can install two charging short-circuit units 411-412 into the input cavity 11 of the traction converter 40, install two filter inductors 42 into the filter inductor cavity 12, and install two support capacitors 43 and two inverter units 44 into the module and control unit cavity 13.

[0067] In this permanent magnet traction embodiment, the installer can install four output isolation contactors 46 into the output cavity 14. The four output isolation contactors 46 can be installed between the four inverters and their corresponding motor loads 45, respectively, and are adapted to disconnect to cut off the power supply from the inverter unit 44 to the permanent magnet synchronous motor load 45, or to close to conduct the power supply from the inverter unit 44 to the permanent magnet synchronous motor load 45.

[0068] In this input-controlled embodiment, each inverter unit 44 can be equipped with two inverters, suitable for outputting two three-phase AC power supplies to power two corresponding permanent magnet synchronous motors 45. Two supporting capacitors C1 and C2 can each supply power to one of their corresponding inverter units 44.

[0069] Because the input cavity 11 reserves space and interfaces for two charging short-circuit units, the filter inductor cavity 12 reserves space and interfaces for two filter inductors, and the module and control unit cavity 13 reserves space and interfaces for two supporting capacitors and two inverter units, the cabinet of the converter device 40 provided by this invention can be flexibly configured with vehicle control or rack control on the input side according to redundancy requirements to meet the configuration requirements of permanent magnet traction, output shaft control, and input rack control. Installation personnel only need to... Figure 3 Based on the embodiment shown, the two charging short-circuit units 411-412 are connected to the corresponding input interfaces respectively, and the DC low-inductance busbar is decomposed into two paths to complete the installation of the converter 40.

[0070] like Figure 2 and Figure 5 As shown, in some embodiments, when the rail vehicle is suitable for configuring a traction converter 50 with asynchronous traction, output frame control, and input vehicle control, the installer can install a charging short-circuit unit 51 into the input cavity 11 of the traction converter 50, install a filter inductor 52 into the filter inductor cavity 12, and install a support capacitor 53 and an inverter unit 54 into the module and control unit cavity 13.

[0071] In this embodiment of vehicle control input, the inverter unit 54 can be equipped with four inverters, suitable for outputting four three-phase AC power supplies to power four asynchronous motors 55. The four inverters can be powered by the same supporting capacitor C.

[0072] Unlike Figure 3 In the illustrated embodiment of permanent magnet traction, in this asynchronous traction embodiment, the installer can directly connect the inverter unit 54 to the corresponding asynchronous motor load 55 instead of installing an output isolating contactor to the output chamber 14. In response to the control signal from the DCU control unit 57, the inverter unit 54 can output three-phase AC power with adjustable voltage and frequency, directly supplying power to the corresponding asynchronous motor load 55.

[0073] By flexibly choosing whether to install an output isolation contactor between the inverter unit and the motor load, this invention can meet the application requirements of both permanent magnet shaft control and asynchronous frame control, and can meet a variety of personalized needs with a platform-based architecture.

[0074] like Figure 2 and Figure 6 As shown, in some embodiments, when the rail vehicle is suitable for configuring an asynchronous traction converter 60 with output frame control and input frame control, the installer can install two charging short-circuit units 611-612 into the input cavity 11 of the traction converter 60, install two filter inductors 62 into the filter inductor cavity 12, and install two support capacitors 63 and two inverter units 64 into the module and control unit cavity 13.

[0075] In this asynchronous traction embodiment, the installer can directly connect the inverter unit 64 to the corresponding asynchronous motor load 65 instead of installing an output isolating contactor to the output chamber 14. In response to the control signal from the DCU control unit 67, the inverter unit 64 can output three-phase AC power with adjustable voltage and frequency, directly supplying power to the corresponding asynchronous motor load 65.

[0076] In this input-controlled embodiment, each inverter unit 64 can be equipped with two inverters, suitable for outputting two three-phase AC power supplies to power two corresponding asynchronous motor loads 65. Two supporting capacitors C1 and C2 can each supply power to one of their corresponding inverter units 64.

[0077] In some preferred embodiments, in response to the rail vehicle's requirement for completely independent input and output control of the traction converter 60, installers can install two DCU control units 67 on the converter 60. In this case, since the module and control unit cavity 13 only has space and interface for one control unit 67, it cannot meet the space requirement for installing two DCU control units 67. Installers can install at least one of the two DCU control units 67 into the output cavity 14.

[0078] In this embodiment of independent input and output rack control, the installer can connect two DCU control units 67 to their respective charging short-circuit units 611 or 612, their respective inverter units, and their respective external control ports. Then, based on the control signals from the external control ports, the two DCU control units 67 can respectively close their respective charging short-circuit units 611 or 612 to charge their respective supporting capacitors C1 or C2; and based on the control signals from the external control ports, they can respectively control the corresponding inverter units 64 to output three-phase AC power with adjustable voltage and frequency, directly supplying power to the two corresponding asynchronous motor loads 65.

[0079] In some preferred embodiments, in response to the rail vehicle's need for intelligent operation and maintenance of the traction converter 60, installers can install a Prognostics Health Management (PHM) module in the module and control unit cavity 13 and / or the fan cavity 15. The PHM module may include detection and control devices. Specifically, the PHM module installed in the fan cavity 15 is adapted to detect and provide feedback on the current and voltage of the cooling fan. The PHM module installed in the module and control unit cavity 13 is adapted to receive and process the status signals of the converter 60 for intelligent operation and maintenance.

[0080] In some embodiments of the present invention, the mechanical interface of the converter can be compatible with various suspension structures. Installers can select a suitable suspension structure according to the suspension method of the converter, and detachably install the suitable suspension structure on the converter to facilitate the suspension of the converter onto the rail vehicle.

[0081] Please refer to Figures 7A-7C , Figures 7A-7C A schematic diagram of a suspension structure provided according to some embodiments of the present invention is shown.

[0082] like Figure 7A As shown, in some embodiments, the suspension structure of the converter may include a crossbeam support lug. When the converter needs to be suspended onto the rail vehicle by means of a crossbeam support, the installer can first install the crossbeam support lug onto the converter, and then mount the lower surface of the crossbeam support lug onto the crossbeam of the rail vehicle to complete the suspension of the converter.

[0083] like Figure 7B As shown, in some embodiments, the sling structure of the converter may include hook slings. When the converter needs to be slinged onto a rail vehicle by hook sling, the installer can first install the hook slings onto the converter, and then support or sling the hook slings onto the hook of the rail vehicle to complete the slinging of the converter.

[0084] like Figure 7C As shown, in some embodiments, the suspension structure of the converter may include side beam support lugs. When the converter needs to be suspended onto the rail vehicle by side beam support, the installer can first install the side beam support lugs onto the converter, and then support the lower surface of the side beam support lugs onto the side beam of the rail vehicle to complete the suspension of the converter.

[0085] Through the compatibility design of the above-mentioned hanging structure, the present invention can meet the hanging requirements of beam support, hook suspension, and side beam support by only modifying the structure of the lifting lugs without changing the main structure of the converter, thereby satisfying a variety of personalized needs of the converter.

[0086] Those skilled in the art will understand that although the above embodiments describe the executor of the converter installation method as an installer, this does not mean that the converter installation method must be performed manually. In some preferred embodiments, the converter installation method described in the above embodiments can also be implemented by a processor-driven robotic arm, thereby automating the installation of the converter.

[0087] In summary, the power converter provided by this invention can be compatible with various requirements and application scenarios without changing its main body size and main interfaces, thereby meeting diverse personalized needs while converging product types. Therefore, the power converter provided by this invention is also suitable for platform-based development of power converter architectures.

[0088] Although the methods described above are illustrated and depicted as a series of actions for the sake of simplicity, it should be understood and appreciated that these methods are not limited by the order of the actions, as some actions may occur in a different order and / or concurrently with other actions from the illustrations and descriptions herein or not illustrated and described herein but which may be understood by those skilled in the art, according to one or more embodiments.

[0089] The prior description of this disclosure is provided to enable any person skilled in the art to make or use this disclosure. Various modifications to this disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not intended to be limited to the examples and designs described herein, but should be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A converter device, characterized in that, include: The input cavity is suitable for connecting a DC high-voltage power supply and has space and interface for a charging short-circuit unit. The filter inductor cavity contains the space and interface for the filter inductor. The module and control unit cavity includes space and interface for supporting capacitors, space and interface for inverter units, and space and interface for a control unit. The output cavity is suitable for connecting a motor load and has a space and interface for an output isolation contactor. as well as The control unit is installed in the module and control unit cavity, and is communicatively connected to the charging short-circuit unit, the inverter unit and an external control port. It is configured to: close the charging short-circuit unit to charge the corresponding supporting capacitor according to the control signal of the control port; and control the inverter unit to output three-phase AC power with adjustable voltage and frequency according to the control signal of the control port.

2. The converter as described in claim 1, characterized in that, The input cavity has spaces and interfaces for two charging short-circuit units; the filter inductor cavity has spaces and interfaces for two filter inductors; and the module and control unit cavity has spaces and interfaces for two supporting capacitors and two inverter units. In the input vehicle control mode, the input cavity is equipped with one of the aforementioned charging short-circuit units, the filter inductor cavity is equipped with one of the aforementioned filter inductors, and the module and control unit cavity is equipped with one of the aforementioned support capacitors and one of the aforementioned inverter units; and / or In input rack control mode, the input cavity is equipped with two charging short-circuit units, the filter inductor cavity is equipped with two filter inductors, and the module and control unit cavity is equipped with two supporting capacitors and two inverter units; and / or In the output shaft control mode of permanent magnet traction, the output cavity is equipped with the output isolation contactor, which is installed between the inverter unit and the motor load; and / or In the asynchronous traction output control mode, the inverter unit is directly connected to the motor load.

3. The converter as described in claim 2, characterized in that, It includes four inverter units for supplying power to the four motor loads, wherein, In the input vehicle control mode, the four inverter units are installed as one circuit, powered by the supporting capacitor of that circuit. In the input frame control mode, the four inverter units are installed in two paths, and are powered by the two supporting capacitors respectively.

4. The converter as described in claim 1, characterized in that, The control unit is also communicatively connected to the output isolation contactor and configured as follows: According to the control signal of the control port, the output isolation contactor is closed to provide the three-phase AC power to the corresponding motor load.

5. The converter as described in claim 1, characterized in that, The inverter unit also includes a chopper unit, which is connected to an absorption resistor. The control unit is also communicatively connected to the chopper unit and is further configured as follows: In response to excessive voltage or when the rail vehicle is braking, the chopper unit is controlled to output excess energy to the absorption resistor.

6. The converter as described in claim 1, characterized in that, In independent input and output control mode, the converter includes two control units, wherein, At least one of the two control units is installed in the output cavity. The two control units are respectively communicatively connected to one of the charging short-circuit units, one of the inverter units, and an external control port, and are configured as follows: According to the control signal from the control port, the corresponding charging short-circuit unit is closed to charge the corresponding supporting capacitor, and Based on the control signal from the control port, the corresponding inverter unit outputs three-phase AC power with adjustable voltage and frequency.

7. The converter as described in claim 1, characterized in that, It also includes a separate fan chamber, which is equipped with a cooling fan.

8. The converter as described in claim 7, characterized in that, It also includes a fault prediction and health management module, which is installed in the module and control unit cavity and / or the fan cavity, wherein, The fault prediction and health management module installed in the module and control unit cavity is adapted to receive and process the status signals of the converter for intelligent operation and maintenance. The fault prediction and health management module installed in the fan cavity is suitable for detecting the current and voltage of the cooling fan and providing feedback.

9. The converter as described in claim 7, characterized in that, It also includes a cabinet, in which the input cavity, the filter inductor cavity, the module and control unit cavity, the output cavity and the fan cavity are integrated. The filter inductor is a miniaturized filter inductor, and the output isolation contactor is a miniaturized output isolation contactor.

10. The converter as claimed in claim 1, characterized in that, It also includes a detachable suspension structure, which includes beam support lugs, hook suspension lugs and side beam support lugs, and is adapted to be matched with appropriate lugs according to the suspension method of the converter.

11. A method for installing a converter, characterized in that, include: The input cavity is connected to a DC high-voltage power supply, and the input cavity is provided with a space and interface for a charging short-circuit unit; In the input vehicle control mode, a charging short-circuit unit is installed in the input cavity, a filter inductor is installed in the filter inductor cavity, and a support capacitor and an inverter unit are installed in the module and control unit cavity. The filter inductor cavity has space and interface for the filter inductor, and the module and control unit cavity has space and interface for the support capacitor, space and interface for the inverter unit, and space and interface for a control unit. The output cavity is connected to a motor load, and the output cavity is provided with a space and interface for an output isolation contactor; and The control unit is installed in the module and control unit cavity, and is communicatively connected to the charging short-circuit unit, the inverter unit and an external control port. It is configured to: close the charging short-circuit unit to charge the corresponding support capacitor according to the control signal of the control port, and control the inverter unit to output three-phase AC power with adjustable voltage and frequency according to the control signal of the control port.

12. The installation method as described in claim 11, characterized in that, The input cavity has spaces and interfaces for two charging short-circuit units; the filter inductor cavity has spaces and interfaces for two filter inductors; the module and control unit cavity has spaces and interfaces for two supporting capacitors and two inverter units; the installation method further includes: In input rack control mode, two charging short-circuit units are installed in the input cavity, two filter inductors are installed in the filter inductor cavity, and two support capacitors and two inverter units are installed in the module and control unit cavity; and / or In the output shaft control mode of permanent magnet traction, an output isolation contactor is installed in the output cavity, wherein the output isolation contactor is installed between the inverter unit and the motor load; and / or In the asynchronous traction output control mode, the inverter unit is directly connected to the motor load.

13. The installation method as described in claim 12, characterized in that, Also includes: In the input vehicle control mode, the four inverter units are installed as one circuit, and the four inverter units are powered by the supporting capacitor of the circuit. The four inverter units are used to supply power to the four motor loads; and In the input frame control mode, the four inverter units are installed in two paths, and the two supporting capacitors supply power to the four inverter units respectively.

14. The installation method as described in claim 11, characterized in that, Also includes: The control unit is communicatively connected to the output isolation contactor, wherein the control unit is further configured to: close the output isolation contactor to provide the three-phase AC power to the corresponding motor load according to the control signal of the control port.

15. The installation method as described in claim 11, characterized in that, The inverter unit also includes a chopper unit, and the installation method further includes: Connect the chopper unit to the absorption resistor; and The control unit is communicatively connected to the chopper unit, wherein the control unit is further configured to: in response to excessive voltage or the rail vehicle being in braking condition, control the chopper unit to output excess energy to the absorption resistor.

16. The installation method as described in claim 11, characterized in that, Also includes: In the independent input and output control mode, at least one of the two control units is installed in the output cavity; as well as The two control units are respectively connected to one charging short-circuit unit, one inverter unit, and an external control port. The two control units are respectively configured to: close the corresponding charging short-circuit unit to charge the corresponding supporting capacitor according to the control signal of the control port, and control the corresponding inverter unit to output three-phase AC power with adjustable voltage and frequency according to the control signal of the control port.

17. The installation method as described in claim 11, characterized in that, Also includes: The cooling fan is installed in a separate fan chamber.

18. The installation method as described in claim 17, characterized in that, Also includes: The fault prediction and health management module is installed in the module and control unit cavity and / or the fan cavity, wherein the fault prediction and health management module installed in the module and control unit cavity is adapted to receive and process the status signal of the converter for intelligent operation and maintenance, and the fault prediction and health management module installed in the fan cavity is adapted to detect the current and voltage of the cooling fan and provide feedback.

19. The installation method as described in claim 17, characterized in that, Also includes: The input cavity, the filter inductor cavity, the module and control unit cavity, the output cavity, and the fan cavity are integrated into a cabinet; A miniaturized filter inductor is selected as the filter inductor; as well as A miniaturized output isolation contactor is selected as the output isolation contactor.

20. The installation method as described in claim 11, characterized in that, Also includes: A suitable suspension structure is selected according to the suspension method of the converter. The suspension structure includes crossbeam support lugs, hook suspension lugs and side beam support lugs. The adapted suspension structure is detachably installed on the converter.

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