Magnetic Levitation Test Platform

Abstract

The present invention provides a maglev test platform, which includes a suspension frame, a mounting frame, an electric control system, a rescue support device, an air spring air supply device, and a weighing device; the mounting frame is arranged on the suspension frame, and the electric control system includes an operation console, a suspension controller, a traction inverter, a traction high-voltage box, a braking resistor box, a braking control unit, a filter, an inverter power supply, an auxiliary power supply, a battery pack, and a low-voltage control box arranged on the mounting frame.

Description

Technical Field

[0001] The present invention relates to the field of maglev testing, and particularly to a maglev test platform. Background Art

[0002] The research and test platform for the software and hardware of the suspension control system of medium and low-speed maglev trains has the function of suspending on the in-plant test line, including stable suspension under various working conditions such as stationary, accelerating, decelerating, and running at a constant speed. This function is realized by the suspension system, and its main equipment includes a suspension controller, a suspension sensor, and a suspension electromagnet.

[0003] When testing the software of the suspension control system of medium and low-speed maglev trains, experiments need to be carried out on the existing maglev track system. The existing research and test platform for the software and hardware of the suspension control system of medium and low-speed maglev trains does not have a weighing function. Summary of the Invention

[0004] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a maglev test platform.

[0005] The present invention provides a maglev test platform, which includes a suspension frame, a mounting frame, an electric control system, a rescue support device, an air spring air supply device, and a weighing device; the mounting frame is arranged on the suspension frame, and the electric control system includes an operation console, a suspension controller, a traction inverter, a traction high-voltage box, a braking resistor box, a filter, an inverter power supply, an auxiliary power supply, a battery pack, and a low-voltage control box arranged on the mounting frame.

[0006] Preferably, the mounting frame includes a first frame, a second frame, and a third frame connected in sequence. The upper ends of the first frame, the second frame, and the third frame are arranged flush, and the height of the second frame is lower than that of the first frame and the third frame to form a recessed part.

[0007] Preferably, the mounting frame further includes four support columns arranged on the lower surfaces of the first frame and the second frame; the weighing device includes:

[0008] An upper connecting plate arranged on the first frame and the third frame;

[0009] A lower connecting plate arranged on the support columns;

[0010] A first connecting rod arranged on the same side of the upper connecting plate and the lower connecting plate, and one end thereof is hinged to the upper connecting plate and the other end is hinged to the lower connecting plate;

[0011] A second connecting rod arranged on the other side of the upper connecting plate and the lower connecting plate, and one end thereof is hinged to the upper connecting plate and the other end is hinged to the lower connecting plate;

[0012] A weighing sensor arranged between the upper connecting plate and the lower connecting plate.

[0013] Preferably, the rescue support device includes a manual pump, a first accumulator, and a support wheel. The support wheel includes a telescopic cylinder disposed on the suspension frame and a wheel body disposed below the telescopic cylinder, and the wheel body is used for docking with the track.

[0014] Preferably, the air spring air supply device includes an air spring connecting the suspension frame and the mounting frame, and a height valve, a differential pressure valve, an air spring control box, an energy storage air cylinder, and an air compressor sequentially connected to the air spring.

[0015] Preferably, the air spring control box, the energy storage air cylinder, the air compressor, the manual pump, the first accumulator, and the inverter power supply are disposed in the first frame, and the filter and the braking resistor box are disposed on the lower surface of the first frame.

[0016] Preferably, the auxiliary power supply and the battery pack are disposed on the lower surface of the third frame, the low-voltage control box is disposed on one side surface of the third frame, and the braking control unit is disposed on the other side surface of the third frame.

[0017] Preferably, the maglev test platform includes four levitation controllers, two of which are disposed in the first frame and are disposed close to the second frame; the other two levitation controllers are disposed in the third frame and are disposed close to the second frame.

[0018] Preferably, the traction high-voltage box is disposed on the lower surface of the second frame and is disposed close to one side surface of the second frame, and the traction inverter is disposed on the lower surface of the second frame and is disposed close to the other side surface of the second frame.

[0019] By providing a maglev test platform including a suspension frame, a mounting frame, an electric control system, a rescue support device, an air spring air supply device, and a weighing device, the present invention has a compact structure and is conducive to maintenance. When performing software and hardware tests during operations such as levitation, driving, and braking, the platform can also be weighed through a weighing sensor to accurately obtain test parameters under different loads. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of a maglev test platform in an embodiment of the present invention;

[0021] Figure 2 It is a schematic structural diagram of another perspective of a maglev test platform in an embodiment of the present invention;

[0022] Figure 3 It is Figure 1 a schematic structural diagram of the electric control system in the embodiment;

[0023] Figure 4 It is Figure 1Schematic structural diagram of the rescue support device in the embodiment;

[0024] Figure 5 For Figure 1 Schematic structural diagram of the suspension frame in the embodiment;

[0025] Figure 6 For Figure 1 Schematic diagram of the functional modules of the traction inverter in the embodiment;

[0026] Figure 7 For Figure 1 Schematic structural diagram of the air spring air supply device in the embodiment;

[0027] Figure 8 For Figure 1 Schematic structural diagram of the support column in the embodiment;

[0028] Figure 9 For Figure 1 Schematic structural diagram of the weighing device in the embodiment. Specific implementation manners

[0029] The present invention will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made. These all belong to the protection scope of the present invention.

[0030] Referring to Figures 1 to 7 , the present invention provides a maglev test platform, including a suspension frame 10, a mounting frame 30, an electric control system, a rescue support device and an air spring air supply device; the mounting frame 30 is arranged on the suspension frame 10, and the electric control system includes an operation console 20, a suspension controller 42, a traction inverter 47, a traction high-voltage box 41, a braking resistor box 48, a filter 43, an inverter power supply 49, an auxiliary power supply 45, a battery pack 44 and a low-voltage control box 50 arranged on the mounting frame 30.

[0031] In this embodiment, the mounting frame 30 includes a first frame 31, a second frame 32 and a third frame 33 that are sequentially connected. The upper ends of the first frame 31, the second frame 32 and the third frame 33 are arranged flush, and the height of the second frame 32 is lower than that of the first frame 31 and the third frame 33 to form a recessed portion.

[0032] The maglev test platform includes four levitation controllers 42, two of which are arranged within the first frame 31 and are disposed close to the second frame 32; the other two levitation controllers 42 are arranged within the third frame 33 and are disposed close to the second frame 32. The traction high-voltage box 41 is arranged on the lower surface of the second frame 32 and is disposed close to one side surface of the second frame 32, and the traction inverter 47 is arranged on the lower surface of the second frame 32 and is disposed close to the other side surface of the second frame 32. The inverter power supply 49 is arranged within the first frame 31, and the filter 43 and the braking resistor box 48 are arranged on the lower surface of the first frame 31. The auxiliary power supply 45 and the battery pack 44 are arranged on the lower surface of the third frame 33, the low-voltage control box 50 is arranged on one side surface of the third frame 33, and the braking control unit 46 is arranged on the other side surface of the third frame 33.

[0033] Specifically, the operation console 20 includes a main control PLC. The levitation controllers 42 are electrically connected to the main control PLC and the levitation magnets inside the levitation frame 10 respectively, and are used to control the magnitude of the levitation force of the levitation magnets. The traction high-voltage box 41 is electrically connected to an external current collector. After the output load of the traction high-voltage box 41 is processed by the filter 43, it is connected to the linear motor through the traction inverter 47. The braking resistor box 48 is electrically connected to the traction inverter 47 and is used to share the current load during the braking phase.

[0034] According to the overall design requirements, the levitation controller 42 inputs a DC330V levitation power supply through a connector, and after passing through a fuse tube, a DC330V power filter 43, a pre-charge unit, a chopper, and a reactor, outputs to the levitation electromagnet through a connector; inputs DC110V through a connector and converts it into DC24V through a control power supply to provide power for the control unit; the control unit receives the input levitation sensor signal and the current signal output by the chopper module, and generates a contactor control signal and a chopper drive signal.

[0035] The traction inverter 47 includes a traction control unit and an IGBT drive board. The traction control unit includes: a main control board, a power control board, a speed signal board, an analog input board, and a digital board; the IGBT drive board is electrically connected to the power control board. The traction inverter 47 includes 8 integrated IGBT drive boards, 6 of which are used for inverter control and 2 of which are used for chopper control.

[0036] Specifically, the traction control unit converts the received instructions into the operating conditions of the subway train. The traction control unit has the functions of vehicle-level control and inverter-level control. The vehicle-level control function is to complete the control of the traction / braking characteristics and logic control of the test bench according to the instructions, realize the on / off control of the contactor in the main circuit and the start / stop control of the traction inverter 47, and calculate the traction / electric braking force required by the test bench. The core task of the inverter control level is to complete the real-time control of the IGBT inverter and the AC asynchronous traction motor, the adhesion utilization control, and at the same time have a complete fault protection function, a module-level fault self-diagnosis function, a fault recording function, and a certain degree of fault self-elimination function. Each traction inverter 47 is configured with a traction control unit chassis, which adopts a 6U standard chassis. The chassis is placed in the inverter box, and the input / output signals are input from the front of each plug-in board. The trigger pulse and feedback signal are transmitted between the traction control unit and the VVVF inverter power module through a shielded cable to achieve the purpose of controlling the VVVF inverter module. The traction control unit internally uses a 32-bit high-speed microprocessor and a 32-bit digital signal processing chip. The plug-in panel of the traction control unit is provided with LED indicators to indicate some control and status information, such as the power-on self-check information of the traction control unit, the power indication, etc., which is convenient for maintenance personnel to judge and measure the status and faults of the traction control unit. The traction control unit uses the field-oriented vector control method to complete the precise torque control of the traction motor, realizing fully computerized and digital real-time control. Through the innovative specific harmonic elimination hybrid PWM modulation technology, the full utilization of the switching frequency can be ensured, and the harmonic content of the output current of the VVVF inverter can be reduced as much as possible, ensuring that the traction drive system works within a lower noise range. The traction control unit completes the traction / braking characteristic control, and calculates the traction or braking torque that the traction motor should exert according to the DC link voltage, the traction motor torque envelope, the speed (motor speed), and the traction / braking level. The rise / fall of the traction / braking torque changes according to the set slope to ensure that the impact rate of the test bench is within the limit range.

[0037] The traction control unit has a perfect fault recording function, which can monitor the faults of the VVVF inverter and the traction control unit in real time. Among them, the fault data includes fault information and historical data. At the same time, the traction control unit can store the records when needed for fault analysis and diagnosis. The fault recording is completed in two forms: one is to record the fault log, that is, to record the status information such as the type of fault occurrence, the occurrence time, the working condition, and the speed; the other is that the traction control unit records the waveform data, that is, to record the sampling data of relevant electrical parameters (such as the DC link voltage, output current, handle level, etc.) for a period of time before and after the fault occurs. Through the standard Ethernet interface provided by the traction control unit, these fault historical data can be downloaded using special software and the data waveform can be played back graphically. The traction control unit can be connected to the PTU through an interface and read the relevant internal data of the traction control unit from the PTU. The PTU software can be connected to the device through the Ethernet interface for debugging, maintenance, and updating the device software of the device. The interface between the PTU and the traction control unit is a standard Ethernet interface, and communication is carried out using the standard TCP / IP protocol stack. This interface can also be connected to a fault recording plug-in to record and track faults.

[0038] The EBCU brake control unit 46 is electrically connected to the main control PLC and can calculate the current braking force in real time according to the current operating condition and the position of the controller handle. If the current required braking force is greater than the maximum braking force of the electric brake, the electric brake and the mechanical brake will act simultaneously, otherwise, the electric brake will brake alone directly. During normal braking operation, the electric brake is preferred, and the caliper is only allowed to participate in braking when the speed drops below 10 km / h or the electric brake fails. When the system triggers the secondary braking, the caliper brake is directly used with the maximum caliper braking force until the test bench stops. When the system triggers the in-vehicle network communication interruption protection, the caliper brake is directly used with the maximum caliper braking force until the test bench stops.

[0039] The power supply system manages and converts the DC1500V power supply taken from the high-voltage distribution box, provides power supplies such as DC330V, DC110V, and AC220V, and supplies power to all on-vehicle electrical equipment; it mainly includes 1 set of DC330V / DC110V power supply, 1 set of DC330V battery, 1 set of DC110V battery, 1 set of AC220V power supply, 1 set of power distribution cabinet, and 1 portable charger. The power supply system converts DC1500V to DC330V and DC110V, and directly charges the 330V battery and 110V battery through the bus respectively. The DC330V / DC110V power supply system includes one charger (DC1500V input, DC330V output is 25kW, DC110V output is 12kW), one group of 330V / 27Ah batteries (maximum discharge current is 60A), and one group of 110V / 27Ah batteries (maximum discharge current is 30A). AC220V is directly converted through DC110V, and its main device is one 6.4kW inverter (DC110V input, AC220V output). According to the requirements of the electrical equipment on the test bench, the low-voltage control box 50 internally includes DC330V 50A / 4 circuits, DC330V 32A / 1 circuit, DC330V - 25A / 1 circuit, DC110V - 6A / 6 circuits, DC110V - 16A / 1 circuit, DC110V - 10A / 2 circuits, AC220V - 16A / 1 circuit, AC220V - 20A / 1 circuit, and AC220V - 10A / 2 circuits, and the circuit breakers are Schneider switches (with leakage protection).

[0040] The rescue support device includes a manually operated pump 52a, a first accumulator 52b, and a support wheel 52c that are connected to each other. The support wheel 52c includes a telescopic cylinder provided on the suspension frame 10 and a wheel body provided below the telescopic cylinder. The wheel body is used to dock with the track, and the telescopic cylinder is connected in parallel with the first accumulator 52b. When the suspension magnet fails or stops working, the support wheel 52c is driven by the manually operated pump 52a to extend to support the suspension frame 10 so that it can move on the railway track.

[0041] The air spring air supply device includes an air spring 51d connecting the suspension frame 10 and the mounting frame 30, and a height valve, a differential pressure valve, an air spring control box 51c, an air storage cylinder 51b, and an air compressor 51a that are sequentially connected to the air spring 51d. The air spring control box 51c also includes a check valve and a pressure reducing valve. The mounting frame 30 further includes support columns 34 provided on the lower surface of the second frame 32 and located at the four corners of the second frame 32. Two ends of the air spring 51d are respectively connected to the suspension frame 10 and the support columns 34, and the air compressor 51a is electrically connected to the main control PLC. The energy storage air cylinder 51b and the air compressor 51a are provided inside the first frame 31.

[0042] The weighing device is responsible for measuring the weight of the entire platform. Weighing sensors are respectively installed at the positions of four air springs above the bogie. The weighing sensors are electrically connected to the main control PLC. When the platform adopts four-point suspension, the total weight of the platform is the sum of the data collected by the four weighing sensors. When the platform is single-point suspended, the load at the current suspension point can also be viewed separately. The vehicle-mounted control system collects the weight output by the weighing system through the AI module and displays it in real time on the operation interface of the console. A weight overrun alarm function is set, and the overrun threshold can be set through the upper computer interface.

[0043] Specifically, the mounting frame further includes four support columns arranged on the lower surfaces of the first frame and the second frame; the weighing device includes: an upper connecting plate 35a, a lower connecting plate 35b, a first connecting rod 35c, a second connecting rod 35d, a weighing sensor 35e, a limit post 35g and a conducting piece 35f.

[0044] The upper connecting plate 35a is arranged on the first frame and the third frame; the lower connecting plate 35b is arranged on the support columns; the first connecting rod 35c is arranged on the same side of the upper connecting plate 35a and the lower connecting plate 35b, and one end is hinged to the upper connecting plate 35a and the other end is hinged to the lower connecting plate 35b; the second connecting rod 35d is arranged on the other side of the upper connecting plate 35a and the lower connecting plate 35b, and one end is hinged to the upper connecting plate 35a and the other end is hinged to the lower connecting plate 35b; the first connecting rod 35c and the second connecting rod 35d are respectively located on adjacent sides of the upper connecting plate 35a. The weighing sensor 35e is arranged between the upper connecting plate 35a and the lower connecting plate 35b; the conducting piece 35f is a U-shaped elastic sheet, which is arranged at a corner of the upper connecting plate 35a and the lower connecting plate 35b far from the first connecting rod 35c and the second connecting rod 35d, and one end is connected to the upper connecting plate 35a and the other end is connected to the lower connecting plate 35b.

[0045] By setting up a maglev test platform including a suspension frame, a mounting frame, an electric control system, a rescue support device, an air spring air supply device and a weighing device 35, the present invention has a compact structure and is conducive to maintenance. When meeting the software and hardware tests during operations such as suspension, driving, and braking, the platform can also be weighed through the weighing sensor 35e to accurately obtain test parameters under different loads.

[0046] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0047] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0048] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art

[0049] The above content is a further detailed description of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can still be made.

Claims

1. A magnetic levitation test platform, characterized in that, It includes a suspension frame, a mounting frame, an electric control system, a rescue support device, an air spring air supply device, and a weighing device; the mounting frame is arranged on the suspension frame, and the electric control system includes an operation console, a suspension controller, a traction inverter, a traction high-voltage box, a braking resistor box, a braking control unit, a filter, an inverter power supply, an auxiliary power supply, a battery pack, and a low-voltage control box arranged on the mounting frame; Among them, the mounting frame includes a first frame, a second frame, and a third frame connected in sequence. Four support columns are arranged on the lower surfaces of the first frame and the second frame; The weighing device includes: An upper connecting plate arranged on the first frame and the third frame; A lower connecting plate arranged on the support columns; A first connecting rod arranged on the same side of the upper connecting plate and the lower connecting plate, with one end hinged to the upper connecting plate and the other end hinged to the lower connecting plate; A second connecting rod arranged on the other side of the upper connecting plate and the lower connecting plate, with one end hinged to the upper connecting plate and the other end hinged to the lower connecting plate; The first connecting rod and the second connecting rod are respectively located on adjacent sides of the upper connecting plate; A weighing sensor arranged between the upper connecting plate and the lower connecting plate.

2. The maglev test platform according to claim 1, characterized in that The upper ends of the second frame and the third frame are arranged flush, and the height of the second frame is lower than that of the first frame and the third frame to form a recessed part.

3. The maglev test platform according to claim 1, characterized in that, The rescue support device includes a manually operated pump, a first accumulator, and a support wheel connected to each other. The support wheel includes a telescopic cylinder arranged on the suspension frame and a wheel body arranged below the telescopic cylinder, and the wheel body is used for docking with the track.

4. According to the maglev test platform described in claim 2, the air spring air supply device includes an air spring connecting the suspension frame and the mounting frame, and a height valve, a differential pressure valve, an air spring control box, an energy storage air cylinder, and an air compressor connected to the air spring in sequence.

5. The maglev test platform according to claim 4, wherein The air spring control box, the energy storage air cylinder, the air compressor, the manually operated pump, the first accumulator, and the inverter power supply are arranged in the first frame, and the filter and the braking resistor box are arranged below the first frame.

6. The maglev test platform according to claim 2, wherein, The auxiliary power supply and the battery pack are arranged on the lower surface of the second frame, the low-voltage control box is arranged on one side surface of the second frame, and the braking control unit is arranged on the other side surface of the second frame.

7. The maglev test platform according to claim 2, wherein The maglev test platform includes four suspension controllers, two of which are arranged on the lower surface of the first frame and close to the second frame; the other two suspension controllers are arranged on the lower surface of the third frame and close to the second frame.

8. The maglev test platform according to claim 2, characterized in that The traction high-voltage box is arranged on the lower surface of the second frame and close to one side surface of the second frame, and the traction inverter is arranged on the lower surface of the second frame and close to the other side surface of the second frame.

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