Low-voltage loop voltage stabilizer for auxiliary system of straddle type monorail vehicle

Abstract

The low-voltage loop voltage stabilizer of the auxiliary system of the straddle type monorail vehicle comprises the box body and the voltage stabilizer unit arranged in the box body, and the voltage stabilizer unit can be arranged according to transient overvoltage exceeding a standard specified voltage normal range existing in the low-voltage auxiliary loop. Transient overvoltage on a low-voltage bus can be absorbed, load equipment on the bus can be protected, transient overvoltage waveform and duration of the transient overvoltage waveform on the low-voltage bus can be captured, electrical characteristic parameters of the voltage stabilizing device can be adjusted according to overvoltage morphological characteristics, meanwhile, self-protection can be achieved when a voltage stabilizing component fails, it is guaranteed that functions of a low-voltage loop are not affected, and reliability of the voltage stabilizing device is improved. The box body can protect the voltage stabilizer unit in the box body and prevent dust, rainwater and other impurities from entering the box body, so that the stability and reliability of the voltage stabilizer unit are improved.

Description

Technical Field

[0001] This utility model belongs to the field of low-voltage circuit of onboard auxiliary system for straddle-type monorail vehicles. Specifically, this utility model relates to a voltage stabilizing device for low-voltage circuit of auxiliary system for straddle-type monorail vehicles. Background Technology

[0002] Currently, the output voltage of the low-voltage circuit of the onboard auxiliary system of straddle-type monorail is controlled by the auxiliary power supply modules within the APU. However, if the fluctuation of the output voltage exceeds the specified range, it will lead to damage to the load equipment. Based on the damage to the load equipment and power supply of the low-voltage circuit of the onboard auxiliary system of the straddle-type monorail vehicles already in operation, it is analyzed that there may be transient overvoltages in the low-voltage circuit that exceed the normal voltage range specified by the standard. It is necessary to develop a voltage regulator that can absorb transient overvoltages on the low-voltage bus, protect the load equipment on the bus, capture the transient overvoltage waveform and its duration on the low-voltage bus, and adjust the electrical characteristic parameters of the voltage regulator according to the overvoltage morphology. At the same time, it can protect itself when the voltage regulator components fail, ensuring that the function of the low-voltage circuit is not affected.

[0003] To address the aforementioned issues, patent document 212518829U discloses a 25Hz phase-sensitive track circuit adaptive voltage regulator, comprising a rectifier-filter circuit for rectifying and filtering the AC voltage across a binary two-position relay in the track circuit. The output of the rectifier-filter circuit is connected to the input of an intelligent voltage comparator circuit. The output of the intelligent voltage comparator circuit drives a transistor to turn on and off. The output of the transistor is connected to a drive relay. The on / off state of the transistor further drives the relay to engage or disengage. The engagement of the relay reduces the resistance value of the resistor connected in series with the Zener diode, but this does not solve the aforementioned problems. Utility Model Content

[0004] This utility model is designed to solve the aforementioned problems. Its purpose is to provide a low-voltage circuit stabilizing device for a straddle-type monorail vehicle auxiliary system. This device is capable of absorbing transient overvoltages exceeding the standard voltage range in the low-voltage auxiliary circuit, protecting the load equipment on the low-voltage bus, capturing the waveform and duration of the transient overvoltages on the low-voltage bus, adjusting the electrical characteristic parameters of the stabilizing device based on the overvoltage's morphological characteristics, and self-protecting itself in case of stabilizing component failure. To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] This utility model provides a low-voltage circuit stabilizing device for an auxiliary system of a straddle-type monorail vehicle, characterized by including a housing and a voltage stabilizing device unit disposed inside the housing.

[0006] The low-voltage circuit stabilizing device of the straddle-type monorail vehicle auxiliary system provided by this utility model may also have the following feature: the box includes a box shell and a box door disposed on the box shell, and the box door is movably disposed on the box shell.

[0007] The low-voltage circuit stabilizing device of the straddle-type monorail vehicle auxiliary system provided by this utility model may also have the following feature: a hanging seat is provided on the housing.

[0008] The low-voltage circuit stabilizing device of the straddle-type monorail vehicle auxiliary system provided by this utility model may also have the following feature: an interface plate is provided on the housing, and a gland is provided on the interface plate.

[0009] The low-voltage circuit voltage stabilizing device of the straddle-type monorail vehicle auxiliary system provided by this utility model may also have the following features: the voltage stabilizing device unit includes a control board, a power supply module and a data logger, the power supply module is connected to the control board, the data logger is connected to the control board, and the power supply module is connected to a wiring busbar.

[0010] The low-voltage circuit voltage stabilizing device of the straddle-type monorail vehicle auxiliary system provided by this utility model may also have the following feature: the voltage stabilizing device unit further includes a contactor, a power current limiting resistor and a TVS tube, the contactor, the power current limiting resistor and the TVS tube are connected in sequence, and the contactor and the TVS tube are connected to the control board.

[0011] The low-voltage circuit voltage stabilizing device of the straddle-type monorail vehicle auxiliary system provided by this utility model may also have the following features: the voltage stabilizing device unit further includes a first voltage sensor, a current sensor, a status indicator light and a second voltage sensor. The first voltage sensor is connected to the control board, the current sensor is connected to the control board, the status indicator light is connected to the control board and the second voltage sensor is connected to the control board.

[0012] The low-voltage circuit stabilizing device of the straddle-type monorail vehicle auxiliary system provided by this utility model may also have the following feature: the control board model is HSEC600.

[0013] The low-voltage circuit stabilizing device of the straddle-type monorail vehicle auxiliary system provided by this utility model may also have the following feature: the data recorder is model HSEC501.

[0014] The technical advantages of this utility model are as follows: The low-voltage circuit voltage stabilizing device for the straddle-type monorail vehicle auxiliary system provided by this utility model includes a housing and a voltage stabilizing device unit disposed inside the housing. The voltage stabilizing device unit can set up a voltage stabilizing device according to the existence of transient overvoltages in the low-voltage auxiliary circuit that exceed the normal voltage range specified by the standard. It can absorb transient overvoltages on the low-voltage bus, protect the load equipment on the bus, capture the transient overvoltage waveform and its duration on the low-voltage bus, and adjust the electrical characteristic parameters of the voltage stabilizing device according to the morphological characteristics of the overvoltage. At the same time, it can protect itself when the voltage stabilizing components fail, ensuring that the function of the low-voltage circuit is not affected. The housing can protect the internal voltage stabilizing device unit, preventing dust, rainwater and other impurities from entering the housing, thereby improving the stability and reliability of the voltage stabilizing device unit.

[0015] Therefore, the low-voltage circuit voltage stabilizing device of the straddle-type monorail vehicle auxiliary system provided by this utility model has good stability and high reliability. It can set up a voltage stabilizing device according to the existence of transient overvoltages in the low-voltage auxiliary circuit that exceed the normal voltage range specified by the standard. It can absorb transient overvoltages on the low-voltage bus and protect the load equipment on the bus. It can capture the transient overvoltage waveform and its duration on the low-voltage bus and adjust the electrical characteristic parameters of the voltage stabilizing device according to the morphological characteristics of the overvoltage. At the same time, it can protect itself when the voltage stabilizing components fail, ensuring that the function of the low-voltage circuit is not affected. Attached Figure Description

[0016] This manual includes the following figures, which illustrate the following:

[0017] Figure 1 This is a schematic diagram of the low-voltage circuit voltage stabilizing device of the straddle-type monorail vehicle auxiliary system in an embodiment of this utility model. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the low-voltage circuit voltage stabilizing device of the straddle-type monorail vehicle auxiliary system in an embodiment of this utility model. Figure 2 ;

[0019] Figure 3 This is a schematic diagram of the low-voltage circuit voltage stabilizing device of the straddle-type monorail vehicle auxiliary system in an embodiment of this utility model. Figure 3 ;

[0020] Figure 4 This is a schematic diagram of the interface board in an embodiment of this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the voltage regulator unit in an embodiment of this utility model. Figure 1 ;

[0022] Figure 6 This is a schematic diagram of the structure of the voltage regulator unit in an embodiment of this utility model. Figure 2 ;

[0023] Figure 7 This is a system topology diagram of the low-voltage circuit voltage stabilizing device of the straddle-type monorail vehicle auxiliary system in an embodiment of this utility model;

[0024] Figure 8 yes Figure 7 Topology diagram of a medium voltage regulator circuit.

[0025] The components in the diagram are labeled as follows: Cabinet-10, Cabinet Shell-11, Cabinet Door-12, Hanging Mount-13, Interface Board-14, Gland Connector-15, Voltage Regulator Unit-20, Control Board-201, Power Module-202, Data Logger-203, Wiring Busbar-204, Contactor-205, Power Current Limiting Resistor-206, TVS Diode-207, First Voltage Sensor-208, Current Sensor-209, Status Indicator Light-210, Second Voltage Sensor-211. Detailed Implementation

[0026] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention, and to facilitate its implementation.

[0027] Figure 1 This is a schematic diagram of the low-voltage circuit voltage stabilizing device of the straddle-type monorail vehicle auxiliary system in an embodiment of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the low-voltage circuit voltage stabilizing device of the straddle-type monorail vehicle auxiliary system in an embodiment of this utility model. Figure 2 ; Figure 3 This is a schematic diagram of the low-voltage circuit voltage stabilizing device of the straddle-type monorail vehicle auxiliary system in an embodiment of this utility model. Figure 3 .

[0028] like Figure 1 , Figure 2 as well as Figure 3As shown, the low-voltage circuit voltage stabilizing device of the straddle-type monorail vehicle auxiliary system provided by this utility model includes a housing 10 and a voltage stabilizing device unit 20 disposed inside the housing 10. The voltage stabilizing device unit 20 can set up a voltage stabilizing device according to the existence of transient overvoltages in the low-voltage auxiliary circuit that exceed the normal voltage range specified by the standard. It can absorb transient overvoltages on the low-voltage bus and protect the load equipment on the bus. It can capture the transient overvoltage waveform and its duration on the low-voltage bus and adjust the electrical characteristic parameters of the voltage stabilizing device according to the morphological characteristics of the overvoltage. At the same time, it can protect itself when the voltage stabilizing components fail, ensuring that the function of the low-voltage circuit is not affected. The housing 10 can protect the internal voltage stabilizing device unit 20 and prevent dust, rainwater and other impurities from entering the housing 10, thereby improving the stability and reliability of the voltage stabilizing device unit 20.

[0029] The enclosure 10 includes an enclosure shell 11 and an enclosure door 12 disposed on the enclosure shell 11. The enclosure door 12 is disposed on the enclosure shell 11 by means of a hinge, which facilitates the opening of the enclosure door 12 to inspect and maintain the voltage stabilizing device unit 20 inside the enclosure 10, thereby improving the reliability of the structure.

[0030] The box body 10 is equipped with a hanging seat 13, which facilitates the installation of the box body 10. The hanging seat 13 can be positioned according to the installation point of the suspension beam of the straddle-type monorail underframe, thereby meeting the requirements of the suspension installation of the straddle-type monorail vehicle underframe and improving the reliability of the structure.

[0031] Figure 4 This is a schematic diagram of the interface board in an embodiment of this utility model.

[0032] like Figure 4 As shown, the housing 11 is provided with an interface plate 14, and the interface plate 14 is provided with a gland 15. The gland 15 is located in the through hole of the interface plate 14 to ensure the sealing performance of the cable and further prevent dust, rain and other impurities from entering the housing 10, thereby further improving the stability and reliability of the voltage regulator unit 20.

[0033] Figure 5 This is a schematic diagram of the structure of the voltage regulator unit in an embodiment of this utility model. Figure 1 ; Figure 6 This is a schematic diagram of the structure of the voltage regulator unit in an embodiment of this utility model. Figure 2 ;

[0034] The voltage regulator unit 20 includes a control board 201, a power module 202, and a data logger 203. The power module 202 is connected to the control board 201, and the data logger 203 is connected to the control board 201. The power module 202 is connected to a busbar 204. The control board 201 is an HSEC600, and the data logger 203 is an HSEC501.

[0035] The voltage regulator unit 20 also includes a contactor 205, a power current-limiting resistor 206, and a TVS diode 207, which are connected in sequence. The contactor 204 and the TVS diode 206 are connected to the control board 201.

[0036] The voltage regulator unit 20 also includes a first voltage sensor 208, a current sensor 209, a status indicator light 210, and a second voltage sensor 211. The first voltage sensor 208 is connected to the control board 201, the current sensor 209 is connected to the control board 201, the status indicator light 210 is connected to the control board 201, and the second voltage sensor 211 is connected to the control board 201.

[0037] Figure 7 This is a system topology diagram of the low-voltage circuit stabilizing device of the straddle-type monorail vehicle auxiliary system in an embodiment of this utility model.

[0038] like Figure 7 As shown, the power module 202 and the wiring busbar 204 are connected to the 110V+ and 110V- inputs from the train system. The output is divided into two paths: one outputs to the input side of the power module 202, and the other outputs to the 110V input bus of the train system. The control board 201 collects signals from the first voltage sensor 208, the current sensor 209, and the second voltage sensor 211, processes the signals, and controls the output of the contactor 205. The power module 202 uses a DC-DC power supply module, which is DC110V to 24V, DC24V to ±15V, and DC24V to 5V respectively. The data logger 203 has a capacity of 32GB, ensuring that the logger collects overvoltage data at a frequency of 10K and maintains one cycle of waveform data inside the data logger.

[0039] Figure 8 yes Figure 7 Topology diagram of a medium voltage regulator circuit.

[0040] like Figure 8 As shown, the voltage regulator circuit consists of a TVS diode 207, a power current-limiting resistor 206, and a contactor 205. The TVS diode 207 used in the voltage regulator circuit responds quickly to overvoltage waveforms in its circuit and handles large overload currents. The power current-limiting resistor 206 limits the short-circuit current to prevent the TVS diode 207 from being damaged by voltage breakdown and becoming conductive, ensuring that the vehicle's low-voltage circuit can continue to operate. The contactor 205 disconnects the TVS circuit when the control board 201 detects that the TVS diode 207 has been damaged by voltage breakdown and is in a conductive state, preventing the power current-limiting resistor 206 from being damaged by the thermal effect of the short-circuit current.

[0041] When a transient overvoltage waveform exceeding the specified value exists on the low-voltage circuit bus, TVS diode 207 turns on, clamping the voltage within the specified range. The circuit of TVS diode 207 connected in series with power current limiting resistor 206 can not only give full play to the TVS diode's ability to quickly suppress transient voltage, but also control the range when TVS fails, ensuring normal power supply to the low-voltage circuit.

[0042] The status indication circuit consists of a control board 201, a contactor 205, a power current limiting resistor 206, a first voltage sensor 208, a status indicator light 210, and a second voltage sensor 211. When the TVS diode 207 is broken down, the TVS diode 207 will be in a continuous conducting state. At this time, the first voltage sensor 208 will detect voltage, and the second voltage sensor 211 will detect no voltage. When the control board 201 receives the voltage signals from the first voltage sensor 208 and the second voltage sensor 211 for more than 10 seconds, the status indicator light 210 will illuminate. When the maintenance personnel see the status indicator light 210 on the enclosure 11 illuminate, the maintenance personnel will open the enclosure door 12 to replace the TVS diode 207.

[0043] When the first voltage sensor 208 detects an overvoltage, but the second voltage sensor 211 does not detect a voltage across the TVS diode 207, the control board 201 receives the voltage signals from both the first and second voltage sensors 208 and activates the status indicator 210 at the frequency of a breathing light. When maintenance personnel see the status indicator 210 on the enclosure 11 illuminate at the breathing light frequency, they open the enclosure door 12 to check if the power current limiting resistor 206 is intact.

[0044] When the machine is powered on, the control board 201 controls the contactor 205 to perform a self-test. If the contactor 205 malfunctions, the control board 201 controls the status indicator light 210 to flash rapidly. When maintenance personnel see the status indicator light 210 flashing rapidly on the housing 11, they should open the door 12 to check if the contactor 205 is intact.

[0045] The circuit failure analysis is shown in the table below:

[0046] Table 1 Circuit Failure Mode Analysis Table

[0047]

[0048]

[0049] As can be seen from the analysis table, regardless of the failure of any one or more of the contactor 205, power current-limiting resistor 206, or TVS tube 207, the voltage stabilizing device unit 20 in the low-voltage circuit voltage stabilizing device of the straddle-type monorail vehicle auxiliary system provided by this utility model only loses its voltage stabilizing function. The vehicle can still work normally. Corrective maintenance is only required after the vehicle returns to the depot, according to the indication of the status indicator light 210 on the housing 11. The voltage stabilizing circuit in the voltage stabilizing box can be transiently activated after the transient overvoltage exceeds the specified value, with a fast response and no delay. It can meet the functional requirements of suppressing transient overvoltage on the bus circuit. At the same time, the housing 10 in the low-voltage circuit voltage stabilizing device of the straddle-type monorail vehicle auxiliary system provided by this utility model is lightweight, small in size, low in cost, has good sealing performance, and flexible in installation position. The housing 10 can protect the internal voltage stabilizing device unit and prevent dust, rainwater and other impurities from entering the housing, thereby improving the stability and reliability of the voltage stabilizing device unit.

[0050] The role and effect of the embodiments

[0051] The low-voltage circuit voltage stabilizing device for the straddle-type monorail vehicle auxiliary system provided by this utility model includes a housing 10 and a voltage stabilizing device unit 20 disposed inside the housing 10. The voltage stabilizing device unit 20 can stabilize the voltage when there is a transient overvoltage in the low-voltage auxiliary circuit that exceeds the normal voltage range specified by the standard. It can absorb the transient overvoltage on the low-voltage bus and protect the load equipment on the bus. It can capture the transient overvoltage waveform and its duration on the low-voltage bus and adjust the electrical characteristic parameters of the voltage stabilizing device according to the morphological characteristics of the overvoltage. At the same time, it can protect itself when the voltage stabilizing component fails, ensuring that the function of the low-voltage circuit is not affected. The housing 10 can protect the internal voltage stabilizing device unit 20 and prevent dust, rainwater and other impurities from entering the housing 10, thereby improving the stability and reliability of the voltage stabilizing device unit 20.

[0052] In the low-voltage circuit stabilizing device of the straddle-type monorail vehicle auxiliary system provided by this utility model, regardless of the failure of any one or more of the contactor 205, power current-limiting resistor 206, or TVS tube 207, the voltage stabilizing device unit 20 in the low-voltage circuit stabilizing device of the straddle-type monorail vehicle auxiliary system provided by this utility model only loses its voltage stabilizing function. The vehicle can still work normally. Only corrective maintenance is required after the vehicle returns to the depot, according to the indication of the status indicator light 210 on the housing 11. The voltage stabilizing circuit in the voltage stabilizing box can be transiently activated after the transient overvoltage exceeds the specified value, with a fast response and no delay. It can meet the functional requirements of suppressing transient overvoltage on the bus circuit. At the same time, the housing 10 of the low-voltage circuit stabilizing device of the straddle-type monorail vehicle auxiliary system provided by this utility model is lightweight, small in size, low in cost, has good sealing performance, and flexible in installation position. The housing 10 can protect the internal voltage stabilizing device unit and prevent dust, rainwater and other impurities from entering the housing, thereby improving the stability and reliability of the voltage stabilizing device unit.

[0053] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A low-voltage circuit voltage stabilizing device for an auxiliary system of a straddle-type monorail vehicle, characterized in that, The device includes a housing (10) and a voltage regulator unit (20) disposed inside the housing (10). The voltage regulator unit (20) includes a control board (201), a power module (202), and a data logger (203). The power module (202) is connected to the control board (201), and the data logger (203) is connected to the control board (201). The power module (202) is connected to a busbar (204). The voltage regulator unit (20) also includes a contactor (205), a power current limiting resistor (206), and a TVS diode (207). The contactor (205), the power current limiting resistor (206), and the TVS diode (207) are connected in sequence. The contactor (205) and the TVS diode (207) are connected to the control board (201).

2. The low-voltage circuit voltage stabilizing device for the straddle-type monorail vehicle auxiliary system according to claim 1, characterized in that, The enclosure (10) includes an enclosure shell (11) and an enclosure door (12) disposed on the enclosure shell (11), the enclosure door (12) being movably disposed on the enclosure shell (11).

3. The low-voltage circuit voltage stabilizing device for the straddle-type monorail vehicle auxiliary system according to claim 2, characterized in that, The housing (11) is provided with a hanging seat (13).

4. The low-voltage circuit voltage stabilizing device for the straddle-type monorail vehicle auxiliary system according to claim 3, characterized in that, The housing (11) is provided with an interface plate (14), and the interface plate (14) is provided with a gland (15).

5. The low-voltage circuit voltage stabilizing device for the straddle-type monorail vehicle auxiliary system according to claim 4, characterized in that, The voltage regulator unit (20) further includes a first voltage sensor (208), a current sensor (209), a status indicator (210), and a second voltage sensor (211). The first voltage sensor (208) is connected to the control board (201), the current sensor (209) is connected to the control board (201), the status indicator (210) is connected to the control board (201), and the second voltage sensor (211) is connected to the control board (201).

6. The low-voltage circuit voltage stabilizing device for the straddle-type monorail vehicle auxiliary system according to claim 5, characterized in that, The control board (201) is model HSEC600.

7. The low-voltage circuit voltage stabilizing device for the straddle-type monorail vehicle auxiliary system according to claim 6, characterized in that, The data logger (203) is model HSEC501.

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