Direct current chopping type LC filter structure

Abstract

The invention discloses a direct current chopping type LC filter structure which comprises a capacitor assembly, an inductor assembly, a detection assembly, a shell body and a fan assembly. The fan assembly is partially arranged on the top plate; the capacitor assembly is arranged below the fan assembly and is also arranged above the inductor assembly; the capacitor assembly and the inductor assembly are arranged in the first shell; the detection assembly is partially arranged on the fixing plate; when a detection box in the detection assembly detects that the temperature in the inductor assembly exceeds a temperature threshold value, the fan assembly is controlled to be started to form an air channel, the inductor assembly and the capacitor assembly are both in the air channel, and air draft is started from the top of the first shell through the air channel to conduct heat dissipation treatment. According to the invention, the overall design of the filter structure is realized, and the heat dissipation efficiency of the filter structure is improved.

Description

Technical Field

[0001] The invention relates to the technical field of filters, and in particular to a direct current chopper type LC filter structure. Background Art

[0002] Passive filter, also known as LC filter, is a filter circuit composed of a combination of inductor, capacitor and resistor. It can filter out one or more harmonics. The most common and easy-to-use passive filter structure is to connect the inductor and capacitor in series, which can form a low-impedance bypass for the main harmonics (f<1 / 2*π*√LC).

[0003] However, the existing LC filter structure is not designed reasonably, and it is not easy to perform heat dissipation treatment inside the structure, resulting in low heat dissipation efficiency. Summary of the invention

[0004] The embodiment of the present invention provides a DC chopper LC filter structure, aiming to solve the problem in the prior art that the LC filter structure is unreasonable in design and it is not easy to perform heat dissipation treatment inside the structure, thus resulting in low heat dissipation efficiency.

[0005] In order to solve the above problems, an embodiment of the present invention provides a DC chopper LC filter structure, wherein the DC chopper LC filter structure includes a capacitor component, an inductor component, a detection component, a shell body and a fan component; the shell body includes a first shell, a top plate and a fixed plate, the top plate is arranged above the first shell, and the fixed plate is arranged on the surface of the first shell; the fan component is partially arranged on the top plate; the capacitor component is arranged below the fan component and also arranged above the inductor component; and the capacitor component and the inductor component are both arranged in the first shell; the detection component is partially arranged on the fixed plate; when the detection box in the detection component detects that the temperature inside the inductor component exceeds the temperature threshold, the fan component is controlled to open to form an air duct, the inductor component and the capacitor component are both in the air duct, and the air duct is used to draw air from the top of the first shell for heat dissipation.

[0006] The embodiment of the present invention provides a DC chopper LC filter structure, which realizes the overall design of the filter structure. The capacitor component is arranged above the inductor component, and the detection box in the detection component is used to detect the temperature inside the inductor component in real time. When the detection box in the detection component detects that the temperature inside the inductor component exceeds the temperature threshold, the fan component is controlled to open to form an air duct. The capacitor component and the inductor component are arranged in the air duct. The fan component uses the air duct to draw air from the top of the first shell to perform heat dissipation processing, thereby improving the heat dissipation efficiency of the filter structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0008] Figure 1 A three-dimensional schematic structural diagram of a DC chopper LC filter structure provided by an embodiment of the present invention;

[0009] Figure 2 A partial schematic structural diagram of a DC chopper LC filter structure provided by an embodiment of the present invention;

[0010] Figure 3 Another partial schematic structural diagram of a DC chopper LC filter structure provided by an embodiment of the present invention;

[0011] Figure 4 Another partial schematic structural diagram of a DC chopper LC filter structure provided by an embodiment of the present invention;

[0012] Figure 5 A schematic diagram of the left side structure of a DC chopper LC filter structure provided by an embodiment of the present invention;

[0013] Figure 6 A schematic diagram of the right side structure of a DC chopper LC filter structure provided in an embodiment of the present invention;

[0014] Figure 7 A front structural schematic diagram of a DC chopper LC filter structure provided by an embodiment of the present invention;

[0015] Figure 8 A schematic structural diagram of the connection between a DC chopper LC filter structure and a DC module provided in an embodiment of the present invention.

[0016] Among them, the reference numerals in the figure are:

[0017] 1. DC chopper LC filter structure; 10. Capacitor assembly; 20. Inductor assembly; 30. Detection assembly; 31. Detection box; 32. Detection power supply; 33. Hall sensor; 34. Fuse; 35. DB9 interface; 40. Shell body; 41. First shell; 42. Top plate; 43. Fixing plate; 44. Front plate; 45. First side plate; 46. Second side plate; 47. Cover plate; 48. Several heat dissipation holes; 49. Handle; 50. Fan assembly; 51. First fan; 52. Second fan; 53. First fan power supply; 54. Second fan power supply; 61. U copper busbar; 62. V copper busbar; 63. W copper busbar; 64. Positive copper busbar; 65. Negative copper busbar; 66. Absorption capacitor; 2. DC module; 71. Positive input copper busbar; 72. Negative input copper busbar. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The directional terms mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "side", "one side", etc., are only referenced to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and understand the present invention, but are not used to limit the present invention. In addition, in the drawings, structures with similar or identical structures are represented by the same reference numerals.

[0020] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0021] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0022] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0023] See also Figure 1-8 , Figure 1 A three-dimensional schematic structural diagram of a DC chopper LC filter structure provided by an embodiment of the present invention; Figure 2 A partial schematic structural diagram of a DC chopper LC filter structure provided by an embodiment of the present invention; Figure 3 Another partial schematic structural diagram of a DC chopper LC filter structure provided by an embodiment of the present invention; Figure 4 Another partial schematic structural diagram of a DC chopper LC filter structure provided by an embodiment of the present invention; Figure 5 A schematic diagram of the left side structure of a DC chopper LC filter structure provided by an embodiment of the present invention; Figure 6 A schematic diagram of the right side structure of a DC chopper LC filter structure provided in an embodiment of the present invention; Figure 7 A front structural schematic diagram of a DC chopper LC filter structure provided by an embodiment of the present invention; Figure 8 A schematic structural diagram of the connection between a DC chopper LC filter structure and a DC module provided in an embodiment of the present invention.

[0024] like Figure 1-8 As shown, an embodiment of the present invention provides a DC chopper type LC filter structure 1, comprising a capacitor component 10, an inductor component 20, a detection component 30, a housing body 40 and a fan component 50; the housing body 40 comprises a first shell 41, a top plate 42 and a fixing plate 43, the top plate 42 is arranged above the first shell 41, and the fixing plate 43 is arranged on the surface of the first shell 41; the fan component 50 is partially arranged on the top plate 42; the capacitor component 10 is arranged below the fan component 50 and also arranged above the inductor component 20; and the capacitor component 10 and the inductor component 20 are both arranged in the first shell 41; the detection component 30 is partially arranged on the fixing plate 43;

[0025] When the detection box 31 in the detection component 30 detects that the temperature inside the inductor component 20 exceeds the temperature threshold, the fan component 50 is controlled to turn on to form an air duct. The inductor component 20 and the capacitor component 10 are both in the air duct, and the air is drawn from the top of the first shell 41 to perform heat dissipation.

[0026] In this embodiment, if Figure 1-8As shown, the working principle of the DC chopper LC (L represents inductance, C represents capacitance) filter structure is to use the inductor component 20 and the capacitor component 10 to generate different impedances for input signals of different frequencies; when the frequency of the input signal is low, the inductor component 20 has a larger resistance to it, while the capacitor component 10 has a smaller resistance to it; when the frequency of the input signal is high, the capacitor component 10 has a larger resistance to it, while the inductor component 20 has a smaller resistance to it; for example, when the DC chopper LC filter structure 1 is a low-pass filter circuit, the capacitor component 10 and the inductor component 20 are connected in series, so that low-frequency signals lower than or equal to the cut-off frequency pass through, and high-frequency signals higher than the cut-off frequency are filtered out, and the cut-off frequency can be set according to actual conditions.

[0027] The DC chopper LC filter structure 1 adopts the inductor component 20 which is an independent mechanical joint; the capacitor component 10 includes a film capacitor, an electrolytic capacitor and a discharge resistor, that is, the capacitor component 10 adopts a combination of the film capacitor and the electrolytic capacitor to perform filtering; the discharge resistor is used to release the residual electricity in the capacitor. In actual use, after the power is turned off, the charged capacitor will cause electric shock to the person touching the structure. The discharge resistor can avoid the occurrence of electric shock accidents, thereby improving the safety of use; the capacitor component 10 and the inductor component 20 are arranged in the air duct formed after the fan component 50 is turned on, and use a more reasonable hardware circuit layout and ingenious structural design to improve the electrical performance and heat dissipation efficiency of the DC chopper LC filter structure 1 and reduce noise.

[0028] The top plate 42 is arranged above the first shell 41 and extends out of the first shell 41 toward one end close to the fixing plate 43, that is, the top plate 42 is partially protruding at one end of the fixing plate 43, and the top plate 42 is detachably connected to the first shell 41; the fixing plate 43 is arranged on the front surface of the first shell 41 and can be connected to the first shell 41 by screws; the fan assembly 50 is partially arranged on the top plate 42; the capacitor assembly 10 and the inductor assembly 20 are both arranged in the first shell 41, and the capacitor assembly 10 is arranged below the fan assembly 50, and the capacitor assembly 10 is also arranged above the inductor assembly 20; the detection assembly 30 is partially arranged on the fixing plate 43, and the detection assembly 30 is also partially arranged inside the inductor assembly 20.

[0029] The capacitor component 10 includes a plurality of capacitors, which can be specifically configured according to actual conditions; similarly, the inductor component 20 includes a plurality of inductors, which can be specifically configured according to actual conditions.

[0030] The detection component 30 is electrically connected to the fan component 50, the capacitor component 10 and the inductor component 20, and the capacitor component 10 is electrically connected to the inductor component 20; that is, the detection box in the detection component 30 can communicate data with the fan component 50, the capacitor component 10 and the inductor component 20 to perform temperature detection of the inductor component 20 and control opening and closing of the fan component 50, current detection between the inductor component 20 and the capacitor component 10, and output voltage detection, and other detection processing. The capacitor component 10 and the inductor component 20 can filter out high-frequency harmonics exceeding 1 / 2*π*√LC frequency. Specifically, the detection box 31 included in the detection component 30 is connected to the fan component 50, the capacitor component 10 and the inductor component 20 through corresponding pins, so as to perform temperature detection of the inductor component 20 and control the opening and closing of the fan component 50, current detection between the inductor component 20 and the capacitor component 10, output voltage detection and other detection processes through the detection box 31.

[0031] When the detection box 31 in the detection component 30 detects that the temperature inside the inductor component 20 exceeds the temperature threshold, the fan component 50 is controlled to open to form an air duct, and the inductor component 20 and the capacitor component 10 are both in the air duct, and the air duct is used to draw air from the top of the first shell 41 for heat dissipation. In this way, drawing hot air from the top of the first shell 41 not only increases the exhaust space of the hot air, but also dissipates the heat of the inductor component 20 and the capacitor component 10 at the same time, thereby improving the heat dissipation efficiency of the filter structure.

[0032] When any type of DC chopper LC (L represents inductance, C represents capacitance) filter structure is assembled, one end of the DC chopper LC filter structure 1 is electrically connected to the DC module 2, the other end of the DC chopper LC filter structure 1 is electrically connected to the electrical equipment, the DC module 2 is also electrically connected to the rectifier feedback module, and the rectifier feedback module is also electrically connected to the industrial frequency power grid.

[0033] Industrial frequency refers to the rated frequency used by power generation, transmission, transformation and distribution equipment as well as industrial and civil electrical equipment in the power system, with the unit of Hertz HZ. China uses 50Hz, and some countries use 60Hz. The rectifier feedback module is a power conversion device that can convert AC power into DC power. The DC chopper LC filter structure 1 filters the harmonics in the third DC power input by the DC module 2. The harmonics refer to the components greater than the integer multiples of the fundamental frequency obtained by Fourier series decomposition of the periodic non-sinusoidal AC quantity, which are usually called high-order harmonics, and the fundamental wave refers to the component whose frequency is the same as the industrial frequency (50Hz).

[0034] Specifically, the rectifier feedback module converts the AC power input from the industrial frequency power grid into a DC power supply, and inputs the DC power supply to the positive input copper bar 71 and the negative input copper bar 72 of the DC module 2; the DC module 2 converts the DC power supply into a third DC power supply, and inputs the third DC power supply to the DC chopper LC filter structure 1; the DC chopper LC filter structure 1 filters the third DC power supply through the capacitor component 10 and the inductor component 20 to obtain a target DC power supply, and inputs the target DC power supply to the electrical equipment.

[0035] The components of the DC chopper LC filter structure 1 are electrically connected using lines or cables to form a filtering circuit and a heat dissipation circuit, thereby realizing the function of filtering harmonics of the third DC power supply input into the DC chopper LC filter structure 1 through the inductor component 20 and the capacitor component 10, and the heat dissipation function of the inductor component 20 and the capacitor component 10 through the fan component 50.

[0036] In one embodiment, if Figure 1-8 As shown, the detection component 30 includes a detection box 31 and a detection resistor, the detection resistor is embedded in the inductor component 20, and the voltage value of the detection resistor is associated with the temperature inside the inductor component 20; the detection box 31 is arranged on the fixed plate 43 and is electrically connected to the detection resistor; the detection box 31 obtains the voltage value of the detection resistor in real time; when the detection box 31 detects that the voltage value is greater than or equal to the preset voltage value, the fan component 50 is controlled to turn on.

[0037] In this embodiment, if Figure 1-8As shown, the detection box 31 is electrically connected to the detection resistor, that is, the detection box 31 is communicatively connected to the detection resistor; the detection resistor is embedded in the middle phase line of the inductor component 20, and is used to detect the temperature inside the inductor component 20; the number of the detection resistor is one, so that the resistance value of the detection resistor will change with the temperature inside the inductor component 20, the higher the temperature, the smaller the resistance, and the voltage value of the analog comparison circuit on the corresponding detection resistor changes with the temperature inside the inductor component 20; the detection box 31 is fixedly arranged on the fixed plate 43; the detection box 31 obtains the voltage value of the detection resistor in real time, and the voltage value of the detection resistor changes with the temperature inside the inductor component 20; when the detection box 31 detects that the voltage value is greater than or equal to the preset voltage value, it means that the resistance value of the detection resistor becomes smaller, and the detection box 31 controls the fan component 50 to open to form the air duct. Among them, the preset voltage value is the maximum voltage value determined according to the limited maximum temperature between the inductor component 20; the model or specification of the detection resistor can be a PT100 thermistor, and the voltage value on the PT100 thermistor has a functional correspondence with the temperature inside the inductor component; the model of the detection power supply 32 can be LRS-05-24; the detection resistor is not shown in the attached figure due to angle problems.

[0038] When the detection box 31 detects that the voltage value is greater than or equal to the preset voltage value, the fan assembly 50 is controlled to open to form the air duct; specifically, when the temperature inside the inductor assembly 20 is greater than or equal to the temperature threshold, and the resistance value of the detection resistor is greater than or equal to the preset voltage value, that is, when the normally open point of the solid-state relay R02 in the detection box 31 is closed, and its normally open point is connected in series in the control circuit of the fan assembly, a command is sent to the fan assembly 50 through the corresponding pin to control the fan assembly 50 to open to form the air duct. Wherein, the detection box 31 includes a solid-state relay; the temperature threshold is a preset maximum temperature value.

[0039] At the same time, when the detection box 31 detects that the voltage value is less than the preset voltage value, the fan assembly 50 is controlled to be turned off; specifically, when the temperature inside the inductor assembly 20 is less than the temperature threshold and the resistance value of the detection resistor is less than the preset voltage value, that is, when the solid-state relay in the detection box 31 detects that the voltage value is less than the preset voltage value, an instruction is sent to the fan assembly 50 through the corresponding pin to control the fan assembly 50 to be turned off. In this way, the fan assembly 50 can be instantly turned on or off through the real-time detection of the detection box 31, thereby improving the heat dissipation efficiency.

[0040] In one embodiment, if Figure 1-8 As shown, the DC chopper LC filter structure 1 also includes a first AC auxiliary power supply; the fan assembly 50 includes a first fan 51, a second fan 52, a first fan power supply 53 and a second fan power supply 54, the first fan 51 and the second fan 52 are arranged on the upper surface of the top plate 42, and the first fan power supply 53 and the second fan power supply 54 are arranged on one end of the fixed plate 43 close to the top plate 42; the first AC auxiliary power supply is converted into a first DC power supply by the first fan power supply 53 and the second fan power supply 54 respectively to supply power to the first fan 51 and the second fan 52 accordingly.

[0041] In this embodiment, if Figure 1-8 As shown, the first AC auxiliary power supply is an AC power supply provided by the industrial frequency power grid and the corresponding voltage is 220V; the first DC power supply refers to a DC power supply with a corresponding voltage of 48V. The first fan 51 and the second fan 52 are arranged on the upper surface of the top plate 42. It can be understood that the top plate 42 is provided with holes adapted to the first fan 51 and the second fan 52, and the top plate 42 is connected to the first fan 51 and the second fan 52 respectively by screws or other means; the first fan 51 and the second fan 52 are arranged on the top of the first housing 41, so that when the fan assembly 50 is inspected or replaced, the corresponding operation can be performed quickly, thereby improving the maintainability of the structure.

[0042] The first AC auxiliary power is converted into a first DC power supply through the first fan power supply 53 and the second fan power supply 54 to supply power to the first fan 51 and the second fan 52 respectively, including: the first AC auxiliary power is converted into the first DC power supply through the first fan power supply 53 to supply power to the first fan 51 for normal operation, and the first AC auxiliary power is converted into the first DC power supply through the second fan power supply 54 to supply power to the second fan 52. In this way, the power supply of the fan assembly 50 is independently set, which improves safety and operability.

[0043] In one embodiment, if Figure 1-8 As shown, the DC chopper LC filter structure 1 also includes a second AC auxiliary power supply; the detection component 30 also includes a detection power supply 32, which is arranged below the detection box 31 and on the fixed plate 43; the second AC auxiliary power supply is converted into a second DC power supply by the detection power supply 32 to supply power to the detection box 31.

[0044] In this embodiment, if Figure 1-8As shown, the second AC auxiliary power supply is an AC power supply provided by the power frequency power grid and the corresponding voltage is 220V; the second DC power supply refers to a DC power supply with a corresponding voltage of 24V; the second AC auxiliary power supply can be input to the detection power supply 32 through a corresponding interface, and the detection power supply 32 can directly convert the second AC auxiliary power supply into the second DC power supply, and the second DC power supply supplies power to the detection box 31 for normal operation. In this way, the power supply of the detection component 30 is independently set, which improves safety and operability.

[0045] The detection component 30 also includes a Hall sensor 33, a fuse 34, etc.; the Hall sensor 33 is arranged on the fixed plate 43, specifically arranged below the detection power supply 32; the Hall sensor 33 is electrically connected to the inductor component 20 and the capacitor component 10, and the Hall sensor 33 is used to detect and process the current between the inductor component 20 and the capacitor component 10 under the control of the detection box 31, so that when the current in the circuit exceeds the current threshold and an overcurrent occurs, an alarm prompt is issued to improve the safety of use; the fuse 34 is arranged on the fixed plate 43, specifically arranged below the Hall sensor 33; the fuse 34 is electrically connected to the capacitor component 10, and the fuse 34 is a current protector, which adds another layer of protection to the circuit. When the current in the circuit exceeds the current threshold, the fuse 34 will generate heat to melt the fuse, thereby disconnecting the circuit, protecting the circuit and equipment from damage, and further improving the safety of use.

[0046] In one embodiment, if Figure 1-8 As shown, the first shell 41 includes a front panel 44 and a first side panel 45, the front panel 44 is arranged on the front of the first shell 41, the first side panel 45 is arranged on the left side of the first shell 41, and the first side panel 45 is detachably connected to the first shell 41; the front panel 44 and the first side panel 45 are connected, and the fixing plate 43 is partially overlapped and arranged on a partial surface of the front panel 44.

[0047] In this embodiment, if Figure 1-8As shown, the front panel 44 is arranged on the front of the first housing 41, and the first side panel 45 is arranged on the left side of the first housing 41; the front panel 44 and the first side panel 45 are vertically connected; the fixing plate 43 is partially overlapped and arranged on a part of the surface of the front panel 44, that is, a part of the surface of the fixing plate 43 is connected to a part of the surface of one end of the front panel 44 close to the top plate 42. The first side panel 45 is detachably connected to the first housing 41. When the first side panel 45 is removed, the capacitor assembly 10 and the inductor assembly 20 can be seen, and the inductor assembly 20 can be repaired or replaced, which effectively improves the maintainability of the structure.

[0048] In one embodiment, if Figure 1-8 As shown, the length of the front panel 44 is less than the length of the first side panel 45. When the capacitor assembly 10 is inspected or replaced, the fixing plate 43 is removed to pull the capacitor assembly 10 out from the front side of the first shell 41 where the front panel 44 is not provided.

[0049] In this embodiment, if Figure 1-8 As shown, the difference in length between the front panel 44 and the first side panel 45 is greater than or equal to the height of the capacitor assembly 10, and the bottoms of the front panel 44 and the first side panel 45 are in the same plane, so that when the capacitor assembly 10 is inspected or replaced, the capacitor assembly 10 can be pulled out by applying an external force from the front part of the first shell 41 where the front panel 44 is not provided to a vertical direction away from the front panel 44 (the vertical direction is relative to the direction perpendicular to the ground of the front panel, that is, the external force applied is parallel to the ground) by directly removing the fixing plate 43. In this way, the safety and maintainability of the structure are effectively improved.

[0050] It should be noted that a sliding track is also provided under the capacitor assembly 10, which is not shown in the attached figure due to angle problems; the sliding track is arranged in the first shell 41, and is arranged at a position between the capacitor assembly 10 and the inductor assembly 20. When the capacitor assembly 10 is inspected or replaced, the fixing plate 43 is directly removed, and the capacitor assembly 10 is pulled out from the front part of the first shell 41 where the front panel 44 is not provided using the sliding track. In this way, the safety and maintainability of the structure are effectively improved.

[0051] In one embodiment, if Figure 1-8As shown, the DC chopper LC filter structure 1 also includes a U copper bar 61, a V copper bar 62 and a W copper bar 63, and the U copper bar 61, the V copper bar 62 and the W copper bar 63 are arranged on the second side plate 46 of the first shell 41, and are used to receive the third DC power supply input by the DC module 2.

[0052] In this embodiment, if Figure 1-8 As shown, the second side plate 46 included in the first shell 41 is arranged on the right side of the first shell 41; the U copper bar 61, the V copper bar 62 and the W copper bar 63 are arranged on the second side plate 46 of the first shell 41 from left to right in sequence; the U copper bar 61, the V copper bar 62 and the W copper bar 63 are correspondingly connected to the output end u / v / w copper bar of the DC module 2, and are also electrically connected to the inductor component 20; the U copper bar 61, the V copper bar 62 and the W copper bar 63 are used to receive the third DC power supply input by the DC module 2, and the third DC power supply is a DC power supply with a target voltage value required by the electrical equipment; the DC module 2 inputs the third DC power supply to the DC chopper LC filter structure 1 through the U copper bar 61, the V copper bar 62 and the W copper bar 63 to filter the third DC power supply.

[0053] The detection box 31 also includes a DB9 interface 35, which is used to connect to a control module; the control module is used to control the DC module 2 and the DC chopper LC filter structure 1, that is, it can control the operation processing flow of the DC module 2 and the DC chopper LC filter structure 1, such as pre-setting the third DC power supply and other processing.

[0054] In one embodiment, if Figure 1-8 As shown, the DC chopper LC filter structure 1 further includes a positive copper bar 64 and a negative copper bar 65, wherein the positive copper bar 64 and the negative copper bar 65 are disposed on the fixing plate 43 and are used to output a filtered target DC power supply to the electrical equipment.

[0055] In this embodiment, if Figure 1-8 As shown, the positive copper bar 64 and the negative copper bar 65 are arranged on the fixing plate 43, specifically below the fuse 34; the positive copper bar 64 and the negative copper bar 65 are used to be electrically connected to the electrical equipment to output the filtered target DC power supply to the electrical equipment; the target DC power supply is used to supply power to the electrical equipment for normal operation, and the electrical equipment can be a flywheel, a battery or other energy storage device.

[0056] In one embodiment, if Figure 1-8 As shown, the shell body 40 further includes a cover plate 47 , and the cover plate 47 is detachably connected to the fixing plate 43 .

[0057] In this embodiment, if Figure 1-8 As shown, the cover plate 47 is matched with the fixing plate 43, and the cover plate 47 is used to protect the components arranged on the fixing plate 43. When the capacitor assembly 10 is to be repaired or replaced, the cover plate 47 is first removed and then the fixing plate 43 is removed, so that the capacitor assembly 10 can be pulled out from the front part of the first housing 41 where the front plate 44 is not arranged, thus effectively improving the safety and maintainability of the structure.

[0058] The cover plate 47 is provided with a handle 49 , and an upward external force can be applied to the handle 49 to remove the cover plate 47 , thus improving the operability of the structure.

[0059] In one embodiment, if Figure 1-8 As shown, a plurality of heat dissipation holes 48 are provided at the bottom of the front panel 44 and the bottom of the first side panel 45 .

[0060] In this embodiment, if Figure 1-8 As shown, the bottom of the second side plate 46 is also provided with a plurality of heat dissipation holes 48; the plurality of heat dissipation holes 48 are used to assist the fan assembly 50 in heat dissipation after the fan assembly 50 is turned on and the air duct is formed, or to perform heat dissipation when the inductor assembly 20 is working. In this way, the plurality of heat dissipation holes 48 improve the heat dissipation efficiency of the structure.

[0061] like Figure 1-8 As shown, the DC chopper LC filter structure 1 also includes an absorption capacitor 66, etc. The absorption capacitor 66 is arranged on the fixed plate 43; the absorption capacitor 66 is specifically arranged below the Hall sensor 33 and above the fuse 34; the absorption capacitor 66 is electrically connected to the capacitor component 10 and the inductor component 20, and is used to absorb high-frequency peak voltage and current.

[0062] The DC module 2 inputs the third DC power supply to the DC chopper LC filter structure 1, and the DC chopper LC filter structure 1 filters the third DC power supply through the capacitor component 10 and the inductor component 20 to obtain a target DC power supply. Specifically, the DC module 2 inputs the third DC power supply to the DC chopper LC filter structure 1 through the U copper bar 61, the V copper bar 62 and the W copper bar 63, and the inductor component 20 receives the third DC power supply; the inductor component 20 filters the third DC power supply to obtain a first filtered DC power, and the first filtered DC power is filtered twice by the capacitor component 10 and the absorption capacitor 66 to obtain the target DC power supply, and the target DC power supply outputs the filtered target DC power supply to the electrical equipment through the positive copper bar 64 and the negative copper bar 65.

[0063] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or substitutions within the technical scope disclosed by the present invention, and these modifications or substitutions should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A DC chopper LC filter structure, characterized in that: The invention comprises a capacitor component, an inductor component, a detection component, a housing body and a fan component; the housing body comprises a first housing, a top plate and a fixing plate, the top plate is arranged above the first housing, the fixing plate is arranged on the surface of the first housing; the fan component is partially arranged on the top plate; the capacitor component is arranged below the fan component and also arranged above the inductor component; and the capacitor component and the inductor component are both arranged in the first housing; the detection component is partially arranged on the fixing plate; When the detection box in the detection component detects that the temperature inside the inductor component exceeds the temperature threshold, the fan component is controlled to turn on to form an air duct. The inductor component and the capacitor component are both in the air duct. The air duct is used to draw air from the top of the first shell to perform heat dissipation.

2. The DC chopper LC filter structure according to claim 1, characterized in that: The detection component includes a detection box and a detection resistor, the detection resistor is embedded in the inductor component, and the voltage value of the detection resistor is associated with the temperature inside the inductor component; the detection box is arranged on the fixed plate and is electrically connected to the detection resistor; the detection box obtains the voltage value of the detection resistor in real time; When the detection box detects that the voltage value is greater than or equal to a preset voltage value, the fan assembly is controlled to turn on.

3. The DC chopper LC filter structure according to claim 1, characterized in that: The DC chopper LC filter structure also includes a first AC auxiliary power supply; the fan assembly includes a first fan, a second fan, a first fan power supply and a second fan power supply, the first fan and the second fan are arranged on the upper surface of the top plate, and the first fan power supply and the second fan power supply are arranged on one end of the fixed plate close to the top plate; the first AC auxiliary power supply is converted into a first DC power supply by the first fan power supply and the second fan power supply respectively to supply power to the first fan and the second fan accordingly.

4. The DC chopper LC filter structure according to claim 2, characterized in that: The DC chopper LC filter structure also includes a second AC auxiliary power supply; the detection component also includes a detection power supply, which is arranged below the detection box and on the fixed plate; the second AC auxiliary power supply is converted into a second DC power supply by the detection power supply to supply power to the detection box.

5. The DC chopper LC filter structure according to claim 1, characterized in that: The first shell includes a front panel and a first side panel, the front panel is arranged on the front of the first shell, the first side panel is arranged on the left side of the first shell, and the first side panel is detachably connected to the first shell; the front panel and the first side panel are connected, and the fixing plate is partially overlapped and arranged on a partial surface of the front panel.

6. The DC chopper LC filter structure according to claim 5, characterized in that: The length of the front panel is smaller than that of the first side panel. When the capacitor assembly is to be repaired or replaced, the capacitor assembly can be pulled out from the front side of the first shell where the front panel is not provided by removing the fixing plate.

7. The DC chopper LC filter structure according to claim 1, characterized in that: The DC chopper LC filter structure also includes a U copper bar, a V copper bar and a W copper bar. The U copper bar, the V copper bar and the W copper bar are arranged on the second side plate of the first shell and are used to receive a third DC power supply input by the DC module.

8. The DC chopper LC filter structure according to claim 1, characterized in that: The DC chopper LC filter structure also includes a positive copper bar and a negative copper bar, and the positive copper bar and the negative copper bar are arranged on the fixed plate and are used to output filtered target DC power to the electrical equipment.

9. The DC chopper LC filter structure according to claim 1, characterized in that: The shell body also includes a cover plate, and the cover plate is detachably connected to the fixing plate.

10. The DC chopper LC filter structure according to claim 5, characterized in that: A plurality of heat dissipation holes are provided at the bottom of the front panel and the bottom of the first side panel.

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