Pre-charging module and inverter

Abstract

The invention provides a pre-charging module and an inverter, relates to the technical field of rail transit, and is used for solving the problem that the pre-charging module is large in size and inconvenient to maintain. The pre-charging module comprises a support and at least one pre-charging assembly, the support is provided with a plurality of discrete mounting grooves, and the plurality of mounting grooves comprise a first mounting groove, a second mounting groove and a third mounting groove; at least one pre-charging assembly comprises a main contactor, a pre-charging contactor and a resistor; the main contactor, the pre-charging contactor and the main circuit are electrically connected alternatively, and the resistor is electrically connected with the pre-charging contactor; wherein the main contactor is located in the first mounting groove, the pre-charging contactor is located in the second mounting groove, and the resistor is located in the third mounting groove. The pre-charging module and the inverter provided by the invention are small in size and convenient to maintain.

Description

Technical Field

[0001] The present application relates to the field of rail transit technology, and in particular to a pre-charging module and an inverter. Background Art

[0002] In recent years, the traction system of urban rail vehicles has been iteratively developing in the direction of modularization, lightweight and miniaturization. The input side of the silicon carbide permanent magnet traction module requires a unit to realize the on and off of the module pre-charging circuit, requiring a small maintenance space to meet the requirements of lightweight modularization.

[0003] In the prior art, the main circuit contactor, pre-charging circuit contactor, and pre-charging resistor in the traction inverter are all independent components, and each component is separately arranged in the cabinet. This requires the three components to be installed and disassembled three times, and the maintenance time is long. Since each component is arranged separately, each independent component requires a bracket, a copper busbar, and a cable for connection, which requires a large maintenance space.

[0004] Therefore, designing a modular and miniaturized traction inverter structure to make the traction inverter easy to maintain is a technical problem that needs to be solved urgently. Summary of the invention

[0005] The present application provides a pre-charging module and an inverter, which integrate various electrical components in the pre-charging module on the same bracket, have a small size, and are easy to maintain.

[0006] In a first aspect, the present application provides a pre-charging module, comprising: a bracket and at least one pre-charging component; the bracket has multiple discrete mounting slots, the multiple mounting slots include a first mounting slot, a second mounting slot, and a third mounting slot; at least one pre-charging component includes a main contactor, a pre-charging contactor, and a resistor; the main contactor, the pre-charging contactor, and a main circuit are selectively electrically connected, and the resistor and the pre-charging contactor are electrically connected; wherein the main contactor is located in the first mounting slot, the pre-charging contactor is located in the second mounting slot, and the resistor is located in the third mounting slot.

[0007] As in the above-mentioned pre-charging module, the first mounting groove, the second mounting groove, and the third mounting groove are arranged in sequence along the circumference of the pre-charging module.

[0008] As for the pre-charging module mentioned above, compared with the center of the pre-charging module, the second mounting groove and the third mounting groove are located on the same side of the pre-charging module.

[0009] As in the above-mentioned pre-charging module, the bracket includes a body and at least two partitions, the body has a containing space, and the extension directions of the at least two partitions intersect;

[0010] The partition is located in the accommodating space to divide the accommodating space into installation grooves.

[0011] As in the above-mentioned pre-charging module, the body includes a bottom plate and a plurality of side plates, the plurality of side plates are sequentially connected end to end along the circumference of the pre-charging module, and the plurality of side plates are connected to the bottom plate along one side of the first direction;

[0012] At least one of the plurality of side panels has a window.

[0013] Like the pre-charging module mentioned above, the pre-charging component also includes a current detector, which is electrically connected to the main contactor and the resistor respectively, and is used to detect the current on the main circuit.

[0014] As in the above-mentioned pre-charging module, there are multiple pre-charging components, and the multiple pre-charging components are all electrically connected to the main circuit.

[0015] As in the above-mentioned pre-charging module, the main contactor, the pre-charging contactor and the resistor of each pre-charging component are arranged at intervals in the corresponding installation grooves.

[0016] As in the above-mentioned pre-charging module, at least a portion of the bracket is coated with an insulating layer.

[0017] In a second aspect, an embodiment of the present application provides an inverter, including a cabinet and the above-mentioned pre-charging module, the cabinet having a containing cavity, and the pre-charging module is located in the containing cavity.

[0018] The present application provides a pre-charging module and an inverter. The bracket is designed to have a plurality of discrete mounting slot structures, and the main contactor, the pre-charging contactor and the resistor are respectively arranged in the mounting slots. In this way, a modular design is adopted, so that a plurality of electrical components are integrated on the same bracket, which can reduce the volume of the pre-charging module and facilitate later maintenance; and at least one pre-charging component is arranged on the main circuit, so that at least one pre-charging component can control a plurality of motors at the same time, or, when one of the pre-charging components fails, the other pre-charging component can still drive the plurality of motors to drive the train normally, and has a strong switching capability.

[0019] Beneficial technical effects achieved by the present invention:

[0020] (1) The present invention divides the bracket into different areas by rationally arranging the bracket so that each electrical component is arranged in a corresponding different area, thereby reducing the volume of the pre-charging module and facilitating subsequent maintenance.

[0021] (2) At least one pre-charging component is used in the pre-charging module of the present invention, so that at least one pre-charging component can control multiple motors at the same time, or, when one of the pre-charging components fails, the other pre-charging component can still drive multiple motors to drive the train normally, and has a strong on-off capability.

[0022] (3) The present invention ensures the electrical performance and safety of independent electrical components through grounding protection and reasonable gap layout. The pre-charging module as a whole is safe and reliable, and can still achieve reliable functions in high-altitude and cold environments, with strong environmental adaptability.

[0023] In addition to the technical problems solved by the present invention, the technical features that constitute the technical solution, and the beneficial effects brought about by the technical features of the technical solution described above, other technical problems that can be solved by a pre-charging module and inverter provided by the present invention, other technical features included in the technical solution, and the beneficial effects brought about by these technical features will be further described in detail in the specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a bracket in a pre-charging module provided in an embodiment of the present application;

[0025] Figure 2 It is a structural schematic diagram of a pre-charging module provided in an embodiment of the present application from one perspective;

[0026] Figure 3 is a structural schematic diagram of a pre-charging module provided in an embodiment of the present application from another perspective;

[0027] Figure 4 This is a circuit diagram of a pre-charging module provided in an embodiment of the present application.

[0028] Description of reference numerals:

[0029] 10- pre-charging module;

[0030] 100- bracket; 110- mounting slot; 111- first mounting slot; 112- second mounting slot; 113- third mounting slot; 120- bracket body; 130- separator; 121- bottom plate; 122- side plate; 123- mounting hole; 124- wiring port; 125- bracket; 126- wire rack; 127- insulator;

[0031] 200-pre-charge component;

[0032] 210-main contactor;

[0033] 220-pre-charging contactor;

[0034] 230 - resistor;

[0035] 240-current detector;

[0036] 300-input copper busbar;

[0037] 400-Output copper busbar. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] The terms used in the implementation section of this application are only used to explain the specific embodiments of this application and are not intended to limit this application.

[0040] To facilitate understanding, the relevant technical terms in the pre-charging module involved in the embodiments of the present application are first explained and illustrated.

[0041] Electrical clearance refers to the shortest spatial distance measured between two conductive parts or between a conductive part and the protective interface of the equipment.

[0042] Creepage distance refers to the shortest path between two conductive parts or between a conductive part and the protective interface of the equipment measured along the insulating surface.

[0043] In recent years, the traction system of urban rail vehicles has been iteratively developing in the direction of modularization, lightweight and miniaturization. The input side of the silicon carbide permanent magnet traction module requires a unit to realize the on and off of the module pre-charging circuit, requiring a small maintenance space to meet the requirements of lightweight modularization.

[0044] In the prior art, the main circuit contactor, pre-charging circuit contactor, and pre-charging resistor in the traction inverter are all independent components, and each component is separately arranged in the cabinet. This requires the three components to be installed and disassembled three times, and the maintenance time is long. Since each component is arranged separately, each independent component requires a bracket, a copper busbar, and a cable for connection, which requires a large maintenance space.

[0045] Therefore, designing a modular and miniaturized traction inverter structure to make the traction inverter easy to maintain is a technical problem that needs to be solved urgently.

[0046] To this end, the present application provides a pre-charging module and inverter. By designing a bracket to have multiple discrete installation slot structures, and arranging the main contactor, pre-charging contactor and resistor in the installation slots respectively, a modular design is adopted, so that multiple electrical components are integrated on the same bracket, which can reduce the volume of the pre-charging module and facilitate later maintenance; and at least one pre-charging component is arranged on the main circuit, so that at least one pre-charging component can control multiple motors at the same time, or, when one of the pre-charging components fails, the other pre-charging component can still drive multiple motors to drive the train normally, and has a strong switching ability.

[0047] A pre-charging module in this embodiment is further described below.

[0048] Figure 1 It is a structural schematic diagram of a bracket in a pre-charging module provided in an embodiment of the present application; Figure 2 It is a structural schematic diagram of a pre-charging module provided in an embodiment of the present application from one perspective; Figure 3 is a structural schematic diagram of a pre-charging module provided in an embodiment of the present application from another perspective; Figure 4 This is a circuit diagram of a pre-charging module provided in an embodiment of the present application.

[0049] like Figure 1 and Figure 4 As shown, an embodiment of the present application provides a pre-charging module 10, including: a bracket 100, wherein the bracket 100 must be able to withstand the weight of the pre-charging module 10 and the vibration and impact force generated during the operation of the urban rail vehicle to ensure that it will not be deformed or damaged during long-term use.

[0050] In this embodiment, the bracket 100 is welded with a stainless steel plate with a thickness of 2.5 mm, and the structure of the bracket 100 is topologically optimized, so that the weight of the bracket 100 can be reduced while ensuring that the bracket 100 has a certain supporting strength.

[0051] In this embodiment, reference Figure 1 As shown, the bracket 100 has a plurality of discrete mounting slots 110, and the plurality of mounting slots 110 include a first mounting slot 111, a second mounting slot 112, and a third mounting slot 113; wherein the first mounting slot 111, the second mounting slot 112, and the third mounting slot 113 are independent of each other and are connected, and each electrical component in the pre-charging module 10 is respectively arranged in each mounting slot 110, which can reduce the physical contact between the electrical components, reduce the risk of short circuit or other physical damage, thereby improving the reliability of the system, and can improve the installation efficiency.

[0052] In this embodiment, reference Figure 2As shown, the pre-charging component 200 includes a main contactor 210, a pre-charging contactor 220 and a resistor 230; the main contactor 210, the pre-charging contactor 220 and the main circuit are selectively electrically connected, and the resistor 230 is electrically connected to the pre-charging contactor 220.

[0053] At present, the traction motors on the traction system of urban rail vehicles usually use two power supply methods: "third rail power supply" and "overhead contact network power supply" to power the subway. Compared with the "overhead contact network power supply" power supply method, the "third rail power supply" method is more efficient and suitable for high-frequency, short-distance subway and light rail systems.

[0054] Among them, as an optional implementation method, this implementation adopts the "third rail power supply" method to power urban rail vehicles. Specifically, a collector shoe is arranged at the bottom of the urban rail vehicle. When the train is running, the collector shoe contacts the third rail arranged on the track to obtain electrical energy. The current is transmitted to the inverter on the train through a cable. The inverter converts the direct current from the third rail into three-phase alternating current suitable for the traction motor. The converted three-phase alternating current is transmitted to the traction motor through a cable. The traction motor converts the three-phase alternating current into mechanical energy to drive the train to run.

[0055] The third rail usually provides direct current, and the voltage range is usually between 600V and 1500V. In this embodiment, the third rail provides 750V direct current. Specifically, the rated input voltage of the main circuit is DC750V, and the instantaneous maximum voltage is DC1000V. In order to prevent the instantaneous increase of current from damaging the electrical components when power is turned on, a pre-charging module 10 is provided between the third rail and the drive motor. Specifically, the main circuit of the pre-charging module 10 is not directly connected to the third rail, and has overvoltage protection, the overvoltage type is OV2, and the pollution level is PD2.

[0056] In this embodiment, the pre-charging module 10 further includes a controller (not shown in the figure), wherein the on and off of the main contactor 210 and the pre-charging contactor 220 in the pre-charging module 10 are realized by the controller.

[0057] Specifically, after receiving the external traction signal, the controller controls the pre-charging contactor 220 to be energized, and the current from the third rail charges the energy storage element through the pre-charging contactor 220 and the resistor 230. When the energy storage element stores 80% of energy, the controller controls the pre-charging contactor 220 to be disconnected. At the same time, the controller controls the main contactor 210 contacts to be energized so that the current bypasses the resistor 230 and directly supplies power to the inverter module.

[0058] In this embodiment, reference Figure 1 As shown, a wiring port 124 is provided on the bottom plate 121 , one end of the wiring port 124 is connected to the contacts of the main contactor 210 and the pre-charging contactor 220 , and the other end is connected to the controller.

[0059] Exemplarily, the type of the connection port 124 may be a connector, a socket, etc. In this embodiment, the connection port 124 is a socket.

[0060] Continue to refer Figure 2 As shown, in this embodiment, the main contactor 210 is located in the first installation slot 111, the pre-charging contactor 220 is located in the second installation slot 112, and the resistor 230 is located in the third installation slot 113. In this way, a modular design is adopted to reasonably allocate the main contactor 210, the pre-charging contactor 220 and the resistor 230 in different areas of the bracket 100, which can maximize the use of limited space, avoid interference and overlap between various electrical components, improve the compactness of the overall layout, reduce the volume, and facilitate subsequent disassembly and maintenance.

[0061] Exemplarily, the types of the main contactor 210 and the pre-charging contactor 220 can be electromagnetic contactors, solid-state contactors, etc., which are not limited in this embodiment. As an optional implementation, in this embodiment, the main contactor 210 and the pre-charging contactor 220 select electromagnetic contactors.

[0062] In this embodiment, a bracket 125 is provided in the mounting groove 110 for supporting each electrical component. Specifically, a threaded hole is provided inside the bracket 125 , and bolts are screwed into the threaded hole to fix each electrical component to the bracket 125 .

[0063] In this embodiment, reference Figure 1 As shown, a wire rack 126 is also provided on the bottom plate 121 for bundling wires of the main circuit and the control circuit, wherein the wire rack 126 is made of stainless steel.

[0064] In a feasible implementation, the first mounting groove 111 , the second mounting groove 112 , and the third mounting groove 113 are arranged in sequence along the circumference of the pre-charging module 10 .

[0065] Among them, as an optional embodiment, the first mounting groove 111, the second mounting groove 112 and the third mounting groove 113 can be arranged in sequence in a stacked manner along the vertical direction, so that the bracket 100 forms a three-layer structure. The purpose of such a setting is to shorten the distance between the electrical components and effectively reduce the space. Or, as another optional embodiment, the first mounting groove 111, the second mounting groove 112, and the third mounting groove 113 are arranged in a two-layer structure along the vertical direction, the first mounting groove 111 is located below the bracket 100, and the second mounting groove 112 and the third mounting groove 113 are located above the bracket 100. Specifically, different arrangements can be selected according to actual conditions.

[0066] In a feasible implementation, the second mounting groove 112 and the third mounting groove 113 are located on the same side of the pre-charging module 10 compared to the center of the pre-charging module.

[0067] In this embodiment, reference Figure 1 As shown, the first mounting groove 111, the second mounting groove 112 and the third mounting groove 113 are distributed along the length direction of the bracket 100, and the third mounting groove 113 is arranged above the second mounting groove 112. The purpose of this arrangement is to combine the sizes of various electrical components and minimize the space occupancy to reduce the volume while fully accommodating various electrical components.

[0068] The main contactor 210 is located in the first installation slot 111 , the pre-charging contactor 220 is located in the second installation slot 112 , and the resistor 230 is located in the third installation slot 113 .

[0069] In an achievable embodiment, the bracket 100 includes a bracket body 120 and at least two partitions 130 , the bracket body 120 has an accommodating space, and the extension directions of the at least two partitions 130 intersect;

[0070] The partition 130 is located in the accommodating space to divide the accommodating space into the mounting grooves 110 .

[0071] In this embodiment, reference Figure 1 As shown, the bracket body 120 has a "U"-shaped structure, and the bracket 100 has two partitions 130, one of which is arranged along the length direction of the bracket body 120 and is set in the middle of the accommodating space to divide the accommodating space into a first mounting groove 111 and a third mounting groove 113, and the other partition 130 is arranged along the height direction of the bracket body 120 to divide the accommodating space into a third mounting groove 113 and a second mounting groove 112.

[0072] Specifically, the separator 130 may be in an “L” shape or a “U” shape. In this embodiment, there is no limitation on the shape of the separator 130 .

[0073] In an achievable embodiment, the bracket body 120 includes a bottom plate 121 and a plurality of side plates 122, the plurality of side plates 122 are sequentially connected end to end along the circumference of the pre-charging module 10, and the plurality of side plates 122 are connected to the bottom plate 121 along one side of the first direction;

[0074] At least one of the plurality of side panels 122 has a window.

[0075] Continue to refer Figure 1As shown, each side panel 122 is provided with a window for the passage of various electrical components and cables, which is convenient for disassembly and assembly of various electrical components, facilitates subsequent maintenance, and can achieve the purpose of heat dissipation to prevent overheating from affecting equipment performance.

[0076] In a feasible implementation, the pre-charging component 200 further includes a current detector 240 , which is electrically connected to the main contactor 210 and the resistor 230 , respectively. The current detector 240 is used to detect the current on the main circuit.

[0077] In this embodiment, reference Figure 2 As shown, a current detector 240 is provided on the main circuit to detect the current on the main circuit during stable operation to prevent damage to electrical components caused by excessive current. Specifically, the current during stable operation is related to the train formation form.

[0078] For example, when the train has 3 power cars and 3 trailers, and the train is working stably, the current on the main circuit is about 443A; when the train has 2 power cars and 4 trailers, and the train is working stably, the current on the main circuit is about 496A. In this embodiment, a 3-power car and 3-trailer train formation is adopted.

[0079] Continue to refer Figure 2 As shown, an insulator 127 is arranged between the current detector 240 and the bracket 100. The purpose of this arrangement is that the insulator 127 can effectively electrically isolate the current detector 240 from the bracket 100, prevent the high voltage or high current of the current detector 240 from being transmitted to the bracket 100, and play the purpose of protecting the safety of equipment and personnel.

[0080] In a feasible implementation, there are multiple pre-charging components 200, and the multiple pre-charging components 200 are all electrically connected to the main circuit.

[0081] As an optional implementation, in this embodiment, reference is made to Figure 4 As shown, there are two pre-charging components 200. Specifically, the two pre-charging components 200 are arranged in parallel on the main circuit, so that the pre-charging components 200 in the pre-charging module 10 can work in parallel, thereby accelerating the pre-charging process, reducing the system startup time, and improving the operating efficiency of the urban rail vehicle traction system; and when one group of pre-charging components 200 fails, the other group of pre-charging components 200 can continue to work, thereby improving the reliability and stability of the system. Compared with the traditional device with only one group of pre-charging components 200, the pre-charging module 10 in this embodiment has a stronger on-off capability and is suitable for inverter working conditions with higher output power.

[0082] In a feasible implementation, the main contactor 210, pre-charging contactor 220 and resistor 230 of each pre-charging assembly 200 are spaced apart in the corresponding mounting slot 110, so that the electrical clearance in the mounting slot 110 is greater than 5 mm by rationally arranging the electrical components.

[0083] As an optional implementation, in this embodiment, the minimum electrical clearance value of the pre-charging module 10 is 5.5 mm, and the creepage distance is 20 mm. In this way, the pre-charging module 10 can meet the electrical clearance and creepage distance requirements, while ensuring electrical safety and reducing the size of the pre-charging module.

[0084] Specifically, as the altitude increases, the air becomes thinner, the air pressure decreases, and the density decreases, resulting in a decrease in the breakdown distance for the same voltage level. Therefore, in order to meet the plateau's anti-breakdown safety distance, the electrical clearance must be increased.

[0085] In this embodiment, through the overall structure of the reasonable layout of the device design, the electrical clearance of the pre-charging module 10 can reach about 30mm, which is much higher than the required 10mm. In this way, under high-altitude working conditions, it can still meet the higher electrical clearance requirements and can still achieve reliable functions in high-altitude and cold environments. It can work under conditions of a maximum altitude of 2500m and a minimum ambient temperature of -40°C.

[0086] In a feasible implementation, at least a partial area of ​​the bracket 100 is coated with an insulating layer.

[0087] In order to prevent the device casing from being charged, thereby protecting passengers and maintenance personnel from the risk of electric shock, the pre-charging module needs to be grounded. In this embodiment, the contact surface where the main contactor 210 and the pre-charging contactor 220 are installed with the bracket 100 is grounded in an unpainted form, that is, a metal conductor is directly used as a grounding wire to guide the current to the ground, thereby preventing the device casing from being charged, thereby providing grounding protection.

[0088] Specifically, the bottom of the bracket 100 and the cabinet installation area are also unpainted, and the grounding of the pre-charging module 10 and the cabinet is achieved in the form of surface contact, which can achieve safe and reliable protective grounding.

[0089] In this embodiment, reference Figure 4As shown, the input end of the pre-charging module 10 is connected to the isolating switch and the high-speed circuit breaker, which mainly plays the role of isolation, protection and control. Specifically, under normal working conditions, the isolating switch and the high-speed circuit breaker are in a closed state; when maintenance or inspection is required, the isolating switch can be manually disconnected to ensure that the pre-charging module 10 is completely isolated from the main power supply to ensure personnel safety; when abnormal current or short circuit is detected, the high-speed circuit breaker will quickly disconnect the circuit to protect the pre-charging module 10 and other electrical components from damage. In this way, by connecting the input end of the pre-charging module 10 to the isolating switch and the high-speed circuit breaker, the safety and reliability of the urban rail vehicle traction system can be effectively improved.

[0090] In this embodiment, an input copper busbar 300 and an output copper busbar 400 are also included. The input copper busbar 300 is arranged at the input end of the pre-charging module 10 and is configured to be connected to the isolating switch and the high-speed circuit breaker; the output copper busbar 400 is arranged at the output end of the pre-charging module 10 and is configured to be connected to the DC filter reactor.

[0091] In this embodiment, reference Figure 4 As shown, the output end of the pre-charging module 10 is connected to a DC filter reactor, which is used to filter out high-frequency harmonics and noise in the DC power supply, provide a smooth DC current, and also reduce voltage and current fluctuations, thereby protecting the stable operation of the urban rail vehicle traction system.

[0092] This embodiment also provides an inverter, including a cabinet and the above-mentioned pre-charging module 10, wherein the cabinet has a receiving cavity, and the pre-charging module 10 is located in the receiving cavity. The specific structure, function and working principle of the pre-charging module 10 have been described in detail in the above-mentioned embodiment, and will not be repeated here.

[0093] In a feasible implementation, a plurality of mounting holes 123 are provided on the bottom plate 121 and the side plate 122 , and the plurality of mounting holes 123 are configured to be fixedly connected to the cabinet.

[0094] Specifically, after the pre-charging module 10 is assembled, it can be pushed into the permanent magnet traction converter cabinet as a whole, and the pre-charging module 10 can be fixed in both horizontal and vertical directions through multiple mounting holes provided at the bottom and back of the bracket 100. Among them, the mounting holes 123 can be visually visible outside the cabinet, and the purpose of such a setting is to facilitate installation or maintenance operations.

[0095] In this embodiment, silicon carbide is selected as the material of the inverter module. The purpose of this setting is that compared with the traditional silicon-based inverter module, the silicon carbide inverter module has higher output efficiency and has the advantages of small size and light weight, which is easier to meet the needs of miniaturization and lightweighting.

[0096] In this embodiment, the pre-charging module 10 is suitable for DC750V or DC1500V traction and auxiliary converter input circuits.

[0097] The present embodiment provides a pre-charging module and an inverter, the pre-charging module 10 includes a bracket 100 and at least one pre-charging component 200, the bracket 100 has a plurality of discrete mounting slots 110, the plurality of mounting slots 110 include a first mounting slot 111, a second mounting slot 112, and a third mounting slot 113; at least one pre-charging component 200 includes a main contactor 210, a pre-charging contactor 220, and a resistor 230; the main contactor 210, the pre-charging contactor 220 and a main circuit are selectively electrically connected, and the resistor 230 is electrically connected to the pre-charging contactor 220; wherein the main contactor 210 is located in the first mounting slot 111, the pre-charging contactor 220 is located in the second mounting slot 112, and the resistor 230 is located in the third mounting slot 113. In this way, by designing the bracket 100 to have multiple discrete installation slot structures, and arranging the main contactor, pre-charging contactor and resistor in the installation slot 110 respectively, a modular design is adopted, so that multiple electrical components can be integrated on the same bracket 100, which can reduce the volume of the pre-charging module 10 and facilitate later maintenance; and at least one pre-charging component 200 is arranged on the main circuit, so that at least one pre-charging component 200 can control multiple motors at the same time, or, when one of the pre-charging components 200 fails, the other pre-charging component 200 can still drive multiple motors to drive the train normally, and has a strong switching ability.

[0098] The terms "first", "second", etc. in the embodiments of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present application described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0099] In the embodiments of the present application, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have specific orientations, or to be constructed and operated in specific orientations. Moreover, in addition to being used to indicate orientations or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present application can be understood according to the specific circumstances.

[0100] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0101] It should be noted that the embodiments represented by "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments that are explicitly or not explicitly described.

[0102] In general, terms should be understood, at least in part, by the context in which they are used. For example, the terms "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "an" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A pre-charging module, characterized in that: include: A bracket (100), the bracket (100) having a plurality of discrete mounting slots (110), the plurality of mounting slots (110) comprising a first mounting slot (111), a second mounting slot (112), and a third mounting slot (113); At least one pre-charging component (200), at least one of the pre-charging components (200) comprising a main contactor (210), a pre-charging contactor (220) and a resistor (230); the main contactor (210), the pre-charging contactor (220) and a main circuit are selectively electrically connected, and the resistor (230) is electrically connected to the pre-charging contactor (220); The main contactor (210) is located in the first installation slot (111), the pre-charging contactor (220) is located in the second installation slot (112), and the resistor (230) is located in the third installation slot (113).

2. The pre-charging module according to claim 1, characterized in that: The first mounting groove (111), the second mounting groove (112), and the third mounting groove (113) are arranged in sequence along the circumference of the pre-charging module (10).

3. The pre-charging module according to claim 1, characterized in that: Compared to the center of the pre-charging module, the second mounting groove (112) and the third mounting groove (113) are located on the same side of the pre-charging module (10).

4. The pre-charging module according to any one of claims 1 to 3, characterized in that: The bracket (100) comprises a bracket body (120) and at least two partitions (130); the bracket body (120) has a containing space, and the extension directions of the at least two partitions (130) intersect; The partition (130) is located in the accommodating space to divide the accommodating space into the installation groove (110).

5. The pre-charging module according to claim 4, characterized in that: The support body (120) comprises a bottom plate (121) and a plurality of side plates (122), wherein the plurality of side plates (122) are sequentially connected end to end along the circumferential direction of the pre-charging module, and the plurality of side plates (122) are connected to the bottom plate (121) along one side of the first direction; At least one of the plurality of side panels (122) has a window.

6. The pre-charging module according to any one of claims 1 to 3, characterized in that: The pre-charging component (200) further comprises a current detector (240), wherein the current detector (240) is electrically connected to the main contactor (210) and the resistor (230) respectively, and the current detector (240) is used to detect the current on the main circuit.

7. The pre-charging module according to any one of claims 1 to 3, characterized in that: There are a plurality of pre-charging components (200), and each of the plurality of pre-charging components (200) is electrically connected to the main circuit.

8. The pre-charging module according to claim 7, characterized in that: The main contactor (210), the pre-charging contactor (220), and the resistor (230) of each pre-charging assembly (200) are arranged at intervals in the corresponding installation groove (110).

9. The pre-charging module according to any one of claims 1 to 3, characterized in that: At least a partial area of ​​the support (100) is coated with an insulating layer.

10. An inverter, characterized in that: It comprises a cabinet and a pre-charging module (10) as claimed in any one of claims 1 to 9, wherein the cabinet has a containing cavity, and the pre-charging module (10) is located in the containing cavity.

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