Train charging guide circuit and control method thereof

Abstract

The invention discloses a train charging guide circuit and a control method thereof. The train charging guide circuit comprises a power supply equipment end, a vehicle end, a voltage detection unit and a controller. The power supply equipment end comprises a power supply, a first resistor, a second resistor, a first switch, a first electrode and a second electrode; the vehicle end comprises a third resistor, a fourth resistor, a second switch, a contactor, a first diode, a second diode, a third electrode and a fourth electrode; the voltage detection unit is used for detecting the voltage of the fourth electrode; one end of the controller is electrically connected with the voltage detection unit, and the other end is electrically connected with the contactor. Compared with the prior art, the detection of the contact state of the charging rack and the pantograph after the vehicle turns around is realized, so that the vehicle can enter a normal guide control program after turning around.

Description

Technical Field

[0001] The present invention relates to the technical field of road traffic, and particularly relates to a train charging guiding circuit and a control method thereof. Background Art

[0002] The top-contact charging system generally consists of an on-vehicle current collector (abbreviated as current collector), a ground pantograph (abbreviated as pantograph), a guiding control circuit, and a control system. The on-vehicle current collector has four conductive arms, namely DC+, DC-, CP, and PE, and their layout is as Figure 1 shown. It can be seen from the above figure that the current collector needs to be installed and used in the specified direction, otherwise it cannot correspond to the electrodes of the ground pantograph. Therefore, when the train uses this charging system, two current collectors will be configured to adapt to the working condition of the train turning around.

[0003] According to the standard "GB / T 40425.1-2020 Electric Bus Top-Contact Charging System - Part 1: General Requirements", the guiding control method for the charging system is to judge the contact state between the pantograph and the current collector by the voltage change formed between CP and PE: when Ucp = 12V, it represents the disconnected state; when 9V ≥ Ucp > 0V, it represents the connected state; among them, when Ucp = 9V, the connection state is successful or the vehicle during charging requests to stop charging, and S2 is disconnected; other charging process states. Its circuit schematic diagram is as Figure 2 shown. If the vehicle turns around, after the charging rack and the pantograph are in contact, the positive and negative poles will be connected in reverse, and CP and PE will also be connected in reverse. After good contact, the voltage of Ucp will not change, so it cannot enter the normal guiding control program, resulting in abnormal charging. Summary of the Invention

[0004] The present invention provides a train charging guiding circuit and a control method thereof to solve the technical problem that the existing train charging system cannot enter the normal guiding control program after the vehicle turns around, resulting in abnormal charging.

[0005] To achieve the above object, the present invention adopts the following technical solutions.

[0006] On the one hand, a train charging guiding circuit is provided, which includes a power supply device end, a vehicle end, a voltage detection unit, and a controller;

[0007] The power supply device end includes a power supply, a first resistor, a second resistor, a first switch, a first electrode, and a second electrode; the positive pole of the power supply is connected to the first electrode, and the negative pole is sequentially connected to the first resistor, the first switch, and the second electrode, and the second resistor is connected in parallel with the first switch;

[0008] The vehicle end includes a third resistor, a fourth resistor, a second switch, a contactor, a first diode, a second diode, a third electrode, and a fourth electrode; the contactor is configured with a normally open contact and a normally closed contact; the cathode of the first diode is connected to the third electrode, and the anode is respectively connected to one ends of the third resistor and the fourth resistor, the other ends of the third resistor and the fourth resistor are connected to the anode of the second diode, and the cathode of the second diode is connected to the fourth electrode; the second switch is disposed between the anode of the first diode and the anode of the second diode and is connected in series with the third resistor; the normally open contact is connected in parallel with the first diode, and the normally closed contact is connected in parallel with the second diode;

[0009] The voltage detection unit is used to detect the voltage of the fourth electrode;

[0010] One end of the controller is electrically connected to the voltage detection unit, and the other end is electrically connected to the contactor.

[0011] In some embodiments, the controller is configured to control the contactor to close when the voltage detected by the voltage detection unit jumps, so that the normally open contact closes and the normally closed contact opens.

[0012] On the other hand, a control method for the above train charging guiding circuit is provided, including the following steps: when the voltage of the fourth electrode jumps, control the contactor to close, so that the normally open contact closes and the normally closed contact opens.

[0013] On the other hand, a computer device is provided, including a memory, a processor, and a computer program stored on the memory, and the processor executes the computer program to implement the steps of the above method.

[0014] On the other hand, a computer-readable storage medium is provided, on which a computer program / instructions are stored, and when the computer program / instructions are executed by a processor, the steps of the above method are implemented.

[0015] On the other hand, a computer program product is provided, including a computer program / instructions, and when the computer program / instructions are executed by a processor, the steps of the above method are implemented.

[0016] The present invention has at least the following technical effects or advantages:

[0017] 1. The detection of the contact state between the charging rack and the pantograph after the vehicle turns around is realized, so that the vehicle can enter the normal guiding control program after turning around.

[0018] 2. It can adapt to the adjustment of the DC+ / DC- polarity caused by the vehicle turning around, reduce the configuration of the train charging rack, and greatly reduce the equipment cost.

[0019] 3. It can effectively solve the problem that the guiding control circuit becomes unavailable due to vehicle turning, and is also compatible with the existing charging guiding circuit. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the current collector of the existing train charging system;

[0021] Figure 2 It is a schematic circuit diagram of the existing train charging system;

[0022] Figure 3 It is a schematic circuit diagram of the train charging guiding circuit in an embodiment of the present invention;

[0023] Figure 4 It is a schematic diagram of the state of the train charging guiding circuit after the polarity is reversed in an embodiment of the present invention. Detailed Embodiments

[0024] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the accompanying drawings of the specification and specific embodiments.

[0025] Embodiment 1

[0026] See Figure 3 , a train charging guiding circuit, including a power supply device end, a vehicle end, a voltage detection unit and a controller;

[0027] Wherein:

[0028] The power supply device end includes a power supply Vdc, a first resistor R1, a second resistor R1', a first switch S1, a first electrode CP and a second electrode PE; the positive pole of the power supply Vdc is connected to the first electrode CP, and the negative pole is sequentially connected to the first resistor R1, the first switch S1 and the second resistor R1', and the second resistor R1' is connected in parallel with the first switch S1.

[0029] The vehicle end includes a third resistor R2, a fourth resistor R3, a second switch S2, a contactor, a first diode D1, a second diode D2, a third electrode CP' and a fourth electrode PE'. The contactor is configured with a normally open contact S51 and a normally closed contact S51. The cathode of the first diode D1 is connected to the third electrode CP', and the anode is respectively connected to one ends of the third resistor R2 and the fourth resistor R3. The other ends of the third resistor R2 and the fourth resistor R3 are connected to the anode of the second diode D2, and the cathode of the second diode D2 is connected to the fourth electrode PE'. The second switch S2 is arranged between the anode of the first diode D1 and the anode of the second diode D2 and is connected in series with the third resistor R2. The normally open contact S51 is connected in parallel with the first diode D1, and the normally closed contact S52 is connected in parallel with the second diode D2.

[0030] The voltage detection unit is used to detect the voltage of the fourth electrode PE'.

[0031] One end of the controller is electrically connected to the voltage detection unit, and the other end is electrically connected to the contactor.

[0032] The controller is configured to control the contactor to close when the voltage detected by the voltage detection unit jumps, so that the normally open contact S51 closes and the normally closed contact S52 opens.

[0033] 1. When the train has not turned around, the first electrode CP is docked with the third electrode CP', the second electrode PE is docked with the fourth electrode PE', the voltage of Ucp changes from 12V to 9V, and the voltage of Ucp' changes from 0 to 9V. If the train turns around, the first electrode CP is docked with the fourth electrode PE', the second electrode PE is docked with the third electrode CP', the voltage of Ucp remains 12V unchanged, and the voltage of Upe' changes from 0 to 12V (i.e., jumps). At this time, it can be determined that the polarity has been reversed, that is, the train has turned around.

[0034] 2. When the controller determines that the train has turned around, it controls the contactor to close, so that the normally open contact S51 closes and the normally closed contact S52 opens. A loop of the guiding circuit is formed as Vdc - R1 - R1' - CP - PE' - D2 - R3 - S51 - CP' - PE, as shown in Figure 4 .

[0035] 3. After the circuit is adjusted, the voltage of Ucp changes from 12V to 9V, and the voltage of Upe' is 9V. The voltage detected by Upe' is used as the original voltage of Ucp' and input, and the charging system is notified through the CAN bus to adjust the positive and negative polarities.

[0036] 4. The vehicle enters the normal charging program.

[0037] Embodiment 2

[0038] A control method for the above-mentioned train charging guiding circuit includes the following steps: when the voltage of the fourth electrode jumps, control the contactor to close, so that the normally open contact closes and the normally closed contact opens.

[0039] Embodiment 3

[0040] A computer device includes a memory, a processor, and a computer program stored on the memory. The processor executes the computer program to implement the steps of the above method.

[0041] Embodiment 4

[0042] A computer-readable storage medium stores a computer program / instructions. When the computer program / instructions are executed by a processor, the steps of the above method are implemented.

[0043] Embodiment 5

[0044] A computer program product includes a computer program / instructions which, when executed by a processor, implement the steps of the above method.

[0045] In the specification provided herein, a number of specific details are set forth. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail so as not to obscure an understanding of this description.

[0046] Similarly, it should be understood that, in order to streamline this disclosure and assist in understanding one or more of the various inventive aspects, in the foregoing description of exemplary embodiments of the invention, the various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, the disclosed method should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, the inventive aspects lie in less than all the features of a single foregoing disclosed embodiment, as reflected in the claims. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of the invention.

[0047] Those skilled in the art should understand that the modules or units or groups of the devices in the examples disclosed herein may be arranged in the devices as described in this embodiment, or alternatively may be located in one or more devices different from those in this example. The modules in the foregoing examples may be combined into one module or further divided into multiple sub-modules.

[0048] Those skilled in the art can understand that the modules in the devices of the embodiments can be adaptively changed and arranged in one or more devices different from those of this embodiment. The modules or units or groups in the embodiments can be combined into one module or unit or group, and in addition can be divided into multiple sub-modules or sub-units or sub-groups. Except that at least some of such features and / or processes or units are mutually exclusive, any combination can be adopted to combine all the features disclosed in this specification (including the accompanying claims, abstract and drawings) and all the processes or units of any method or device so disclosed. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstract and drawings) can be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0049] In addition, those skilled in the art will be able to understand that, although some of the embodiments described herein include certain features included in other embodiments but not other features, the combination of the features of different embodiments means that it is within the scope of the invention and forms different embodiments.

[0050] In addition, some of the embodiments described herein are described as methods or combinations of method elements that can be implemented by a processor of a computer system or by other devices performing the functions. Accordingly, a processor having the necessary instructions for implementing the method or method element forms an apparatus for implementing the method or method element. In addition, the elements described herein of the apparatus embodiments are examples of apparatus for performing the functions performed by the elements for the purposes of implementing the invention.

[0051] The various techniques described herein can be implemented in conjunction with hardware or software, or a combination thereof. Thus, the methods and apparatuses of the present invention, or certain aspects or portions of the methods and apparatuses of the present invention, may take the form of program code (i.e., instructions) embedded in a tangible medium, such as a floppy disk, a CD-ROM, a hard disk drive, or any other machine-readable storage medium, where, when the program is loaded into and executed by a machine such as a computer, the machine becomes an apparatus for practicing the present invention.

[0052] In the case where the program code is executed on a programmable computer, the computing device generally includes a processor, a processor-readable storage medium (including volatile and non-volatile memory and / or storage elements), at least one input device, and at least one output device. Wherein, the memory is configured to store the program code; the processor is configured to execute the method of the present invention according to the instructions in the program code stored in the memory.

[0053] By way of example and not limitation, computer-readable media includes computer storage media and communication media. Computer-readable media includes computer storage media and communication media. Computer storage media stores information such as computer-readable instructions, data structures, program modules, or other data. Communication media typically embodies computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media. Combinations of any of the above are also included within the scope of computer-readable media.

[0054] As used herein, unless otherwise specified, the use of ordinal numbers "first", "second", "third", etc. to describe ordinary objects merely indicates different instances of similar objects and is not intended to imply that the objects so described must have a given order in time, space, ranking, or in any other manner.

[0055] Although the present invention has been described based on a limited number of embodiments, those skilled in the art in this technical field will understand that other embodiments can be envisioned within the scope of the present invention thus described. In addition, it should be noted that the language used in this specification is mainly selected for the purpose of readability and teaching, rather than for the purpose of explaining or limiting the subject matter of the present invention. Therefore, many modifications and changes are obvious to those of ordinary skill in the art without departing from the scope and spirit of the appended claims. For the scope of the present invention, the disclosure of the present invention is illustrative rather than restrictive, and the scope of the present invention is defined by the appended claims.

[0056] Finally, it should be noted that the present invention does not elaborate on the common knowledge recognized by those skilled in the art. The above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A train charging guidance circuit, comprising a power supply device end, a vehicle end, a voltage detection unit and a controller; characterized in that: The power supply device end includes a power supply, a first resistor, a second resistor, a first switch, a first electrode and a second electrode; the positive electrode of the power supply is connected to the first electrode, and the negative electrode is sequentially connected to the first resistor, the first switch and the second electrode, and the second resistor is connected in parallel with the first switch; The vehicle end includes a third resistor, a fourth resistor, a second switch, a contactor, a first diode, a second diode, a third electrode and a fourth electrode; the contactor is configured with normally open contacts and normally closed contacts; the cathode of the first diode is connected to the third electrode, and the anode is respectively connected to one ends of the third resistor and the fourth resistor, and the other ends of the third resistor and the fourth resistor are connected to the anode of the second diode, and the cathode of the second diode is connected to the fourth electrode; the second switch is disposed between the anode of the first diode and the anode of the second diode and is connected in series with the third resistor; the normally open contacts are connected in parallel with the first diode, and the normally closed contacts are connected in parallel with the second diode; The voltage detection unit is used to detect the voltage of the fourth electrode; One end of the controller is electrically connected to the voltage detection unit, and the other end is electrically connected to the contactor.

2. The train charging guidance circuit according to claim 1, wherein: The controller is configured to control the contactor to close when the voltage detected by the voltage detection unit jumps, so that the normally open contacts close and the normally closed contacts open.

3. A control method for a train charging guiding circuit as described in claim 1 or 2, characterized in that, It includes the following steps: when the voltage of the fourth electrode jumps, control the contactor to close, so that the normally open contacts close and the normally closed contacts open.

4. A computer device, comprising a memory, a processor, and a computer program stored on the memory, characterized in that, The processor executes the computer program to implement the steps of the method according to claim 3.

5. A computer-readable storage medium having computer programs / instructions stored thereon, characterized in that, When the computer program / instructions are executed by the processor, the steps of the method according to claim 3 are implemented.

6. A computer program product, comprising a computer program / instructions, characterized in that, When the computer program / instructions are executed by the processor, the steps of the method according to claim 3 are implemented.

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