Single-phase differential common mode reactor

Abstract

The present application relates to the technical field of reactors, and specifically discloses a single-phase differential common-mode reactor, which mainly includes: an iron core, the iron core includes a first iron yoke and a second iron yoke, the first iron yoke has a first winding column and a second winding column, and also includes: a first winding frame, the first winding frame is used to absorb the heat of the iron core; a winding assembly is used to transfer heat to the first winding frame when the reactor is in operation; the second winding frame is used to absorb the heat of the iron core and the winding assembly; a first fan is used to dissipate heat from the first winding frame and the second winding frame to achieve cooling of the reactor. The first winding frame and the second winding frame of the present application are arranged in a narrow space formed by the winding and the iron core, which can effectively absorb the heat generated by the reactor during operation, and the first fan can extract the gas in the first winding frame and the second winding frame to improve the heat extraction efficiency, reduce the safety hazards that may be caused by heat accumulation, and ensure the normal operation of the differential common-mode reactor.

Description

Technical Field

[0001] The present application relates to the technical field of reactors, and in particular to a single-phase differential common-mode reactor. Background Art

[0002] Differential common mode reactor is a component used to suppress common mode interference signals in circuits. In a circuit, a differential mode signal is a signal between two wires, while a common mode signal is a signal carried by two wires at the same time. Differential common mode reactors are mainly used to process the relationship between these two signals.

[0003] During operation, the reactor will generate heat due to resistance loss, core loss, local temperature rise, and external environment. In order to ensure the normal operation of the reactor, a reasonable design of the heat dissipation system is required. Some differential and common mode reactors use an inner and outer winding structure. When air cooling is used for heat dissipation, there is an approximately annular space between the inner winding and the core and between the inner and outer windings. The space is relatively narrow, and the winding is wound on the core. Due to the obstruction of the core, it is difficult for the exhaust end of the fan to effectively face the annular space, making it difficult to extract the heat in the space, which is not conducive to the heat dissipation of the differential and common mode reactors. Summary of the invention

[0004] The present application provides a single-phase differential common-mode inductor, which solves the problem in the prior art that heat between the inner winding and the iron core and between the inner and outer windings is difficult to extract, which is not conducive to the heat dissipation of the differential common-mode inductor, thereby improving the heat extraction efficiency, reducing the safety hazards that may be caused by heat accumulation, and ensuring the normal operation of the differential common-mode inductor.

[0005] The present application provides a single-phase differential common-mode reactor, comprising: an iron core, the iron core comprising a first iron yoke and a second iron yoke, the first iron yoke having a first winding column and a second winding column, and further comprising: a first winding frame, the first winding frame being used to absorb the heat of the iron core when the reactor is in operation, the first winding frame comprising two groups of first columns, the two groups of the first columns being respectively mounted on the first winding column and the second winding column, and a first channel being arranged inside the first column; a winding assembly, which is used to transfer heat to the first winding frame when the reactor is in operation, the winding assembly comprising two first windings, the two first windings being respectively wound on the two groups of the first columns; a second winding frame, The second winding frame is used to absorb the heat of the iron core and the winding assembly when the inductor is operating. The second winding frame is detachably connected to the first winding frame. The second winding frame includes two groups of second columns. A second channel is arranged in the second columns. The second channel is connected to the first channel when the second winding frame is connected to the first winding frame; the winding assembly also includes two second windings, and the two second windings are respectively wound on the outer surfaces of the two groups of second columns; a first fan, whose exhaust end is connected to the first channel, and the first fan cools the first winding frame and the second winding frame by extracting gas in the first channel and the second channel to dissipate heat to achieve cooling of the inductor.

[0006] The first winding frame and the second winding frame are arranged in a narrow space formed by the winding and the iron core, which can effectively absorb the heat generated by the inductor during operation. The first fan can extract gas from the first winding frame and the second winding frame to improve the heat extraction efficiency of the first winding frame and the second winding frame, reduce the safety hazards that may be caused by heat accumulation, and ensure the normal operation of the differential common mode inductor.

[0007] Furthermore, an air gap is formed between the first iron yoke and the second iron yoke, the bottom of each group of the second columns is connected to a third connecting part, the interior of the third connecting part is connected to all the second channels, and the bottom of the third connecting part is also connected to a negative pressure block, and a negative pressure port connected to the interior of the third connecting part is provided on the side of the negative pressure block, and the negative pressure port faces the air gap when the second winding frame is connected to the first winding frame.

[0008] Furthermore, the reactor also includes a heat dissipation cover, which includes a shell, which is installed on the top of the first iron yoke, and a third channel is formed between the shell and the first iron yoke, and an air inlet is provided at one end of the third channel. A second fan with an exhaust end facing the third channel is installed at the top of the shell away from the air inlet.

[0009] Furthermore, a plurality of heat introduction pipes are connected between the first fan and the first channel, and the plurality of heat introduction pipes are passed through the first iron yoke and the third channel and are distributed at intervals in the third channel.

[0010] Furthermore, a second rod body is connected between the first iron yoke and the second iron yoke, and the first iron yoke and the second iron yoke are both sleeved on the outer surface of the second rod body. The first iron yoke or the second iron yoke can move along the axial direction of the second rod body, and the air gap is increased or decreased due to the movement of the first iron yoke or the second iron yoke.

[0011] Furthermore, a first rod body is connected between the first iron yoke and the second iron yoke, and the first iron yoke or the second iron yoke moves due to the rotation of the first rod body.

[0012] Furthermore, it also includes: a temperature sensor, a processor and a servo motor; the temperature sensor is used to monitor the temperature in the air gap; the processor is used to obtain the monitored temperature and determine the interval in which the monitored temperature is located, and drive the servo motor to rotate forward or reverse a specified angle when the monitored temperature changes in the interval; the servo motor is used to drive the first rod to rotate.

[0013] Furthermore, the first winding frame also includes a first connecting part and a second connecting part, the first connecting part and the second connecting part are respectively connected to the top and the bottom of a single group of the first columns, the interiors of the first connecting part and the second connecting part are both connected to the first channel, a first joint is provided on the top of the second column, the first joint is movably plugged into the first connecting part, and the second channel is connected to the interior of the first connecting part when the first joint is plugged into the first connecting part, a second joint is provided on the top of the third connecting part, the second joint is plugged into the second connecting part when the first joint is plugged into the first connecting part, and the interior of the third connecting part is connected to the interior of the second connecting part when the second joint is plugged into the second connecting part.

[0014] Furthermore, the first winding frame, the second winding frame and the heat pipe are all made of high-temperature resistant thermally conductive silicone.

[0015] The technical solution provided by this application has at least the following technical effects or advantages:

[0016] Since the first winding frame and the second winding frame are arranged in a narrow space formed by the winding and the iron core, the heat generated by the reactor during operation can be effectively absorbed, and the first fan can extract the gas in the first winding frame and the second winding frame to the first winding frame and the second winding frame, thereby effectively solving the problem that the heat between the inner winding and the iron core and between the inner and outer windings is difficult to extract, which is not conducive to the heat dissipation of the differential common mode reactor, improving the heat extraction efficiency, reducing the safety hazards that may be caused by heat accumulation, and ensuring the normal operation of the differential common mode reactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the single-phase differential common mode reactor of this application;

[0018] Figure 2 For this application Figure 1 Schematic diagram of the structure of the middle iron core;

[0019] Figure 3 This is a schematic diagram of the structure of the first iron yoke and the first winding frame of the present application;

[0020] Figure 4 This is a schematic diagram of the structure in which the first winding is wound on the first winding frame and the second winding frame is separated from the first winding frame;

[0021] Figure 5 This is a schematic diagram of the structure after the second winding frame of the present application is installed on the first winding frame;

[0022] Figure 6 The schematic diagram of the single-phase differential common mode reactor for this application;

[0023] Figure 7 This is a schematic diagram of the structure of the second winding of the present application after it is wound on the second winding frame;

[0024] Figure 8 This is a schematic diagram of the separation structure of the heat dissipation cover and the first iron yoke of the present application;

[0025] Fig. 9 This is a schematic diagram of the structure in which the heat dissipation cover of the present application is installed on the first iron yoke;

[0026] Fig.10 For this application Fig. 9 Schematic diagram of the internal structure of the middle heat dissipation cover;

[0027] Fig.11 This is a schematic diagram of the structure when the second rod body of the present application is installed on the iron core;

[0028] Fig.12 This is a schematic diagram of the structure when the first rod body of the present application is installed on the iron core;

[0029] Fig.13This is a schematic structural diagram of the second winding frame of this application.

[0030] In the figure:

[0031] 1. iron core; 11. first iron yoke; 111. first winding column; 112. second winding column; 12. second iron yoke; 13. air gap;

[0032] 2. Winding assembly; 21. First winding; 22. Second winding;

[0033] 3. First rod body; 31. Servo motor; 32. Second rod body;

[0034] 4. first winding frame; 41. first column; 42. first connecting portion; 43. second connecting portion;

[0035] 5. second winding frame; 51. second column; 511. first joint; 52. third connecting portion; 521. second joint; 53. negative pressure block;

[0036] 6. Heat pipe;

[0037] 7. First fan;

[0038] 8. heat dissipation cover; 81. housing; 82. second fan; 83. third channel; 831. air inlet. DETAILED DESCRIPTION

[0039] In order to solve the heat dissipation problem in the narrow space formed by the differential and common mode inductor windings and the iron core, the present application proposes a differential and common mode inductor, which can improve the heat dissipation efficiency of the differential and common mode inductor, reduce the safety hazards that may be caused by heat accumulation, and ensure the normal operation of the differential and common mode inductor.

[0040] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0041] Embodiment 1:

[0042] like Figure 1-Figure 6 As shown, a single-phase differential common mode reactor includes: an iron core 1, a first winding frame 4, a winding assembly 2, a second winding frame 5 and a first fan 7.

[0043] The core 1 includes a first iron yoke 11 and a second iron yoke 12. The first iron yoke 11 has a first winding column 111 and a second winding column 112. The first winding column 111 and the second winding column 112 are respectively arranged at two ends of the first winding column 111, so that the first iron yoke 11 has an N-shaped frame structure.

[0044] The first winding frame 4 is used to absorb the heat of the iron core 1 when the inductor is in operation. The first winding frame 4 includes two groups of first columns 41, which are respectively installed on the first winding column 111 and the second winding column 112. The first column 41 is provided with a first channel inside.

[0045] The magnetic material in the iron core 1 will produce hysteresis loss and eddy current loss when the magnetic field changes. These losses will cause the iron core 1 to heat up. The temperature increase of the iron core 1 may cause local overheating of the inductor, thereby affecting the performance and safety of the inductor. When the overall temperature of the inductor increases, it may affect the performance and life of the inductor. In addition, the iron core 1 will undergo thermal expansion when heated, which may cause the size of the iron core 1 to change, thereby affecting the structural stability of the inductor. The magnetic properties of the iron core 1 may be affected at high temperatures, causing changes in the electrical properties of the inductor.

[0046] In the present embodiment, a single group of first columns 41 includes a plurality of first columns 41, and the first columns 41 are in a columnar structure. The first columns 41 can be directly fixed on the first winding column 111 and the second winding column 112, so that the first columns 41 extend along the length direction of the first winding column 111 or the second winding column 112. The single group of first columns 41 surrounds the first winding column 111 or the second winding column 112. The number of first columns 41 in the single group of first columns 41 is at least 4, and there is a spacing between different first columns 41. Each first column 41 is provided with a first channel, and the first channel extends along the axial direction of the first column 41. The first winding frame 4 can be made of a material with good thermal conductivity and insulation, such as a high-temperature resistant thermal conductive silicone with a certain hardness. Since the first column 41 is directly mounted on the iron core 1, it can effectively absorb the heat generated by the iron core 1 during operation. In the present embodiment, a protrusion can be provided on the inner wall of the first channel, and the shape of the protrusion is not limited, which is used to increase the area of ​​the inner wall of the first channel.

[0047] The winding assembly 2 is used to transfer heat to the first winding frame 4 when the reactor is in operation. The winding assembly 2 includes two first windings 21 , and the two first windings 21 are respectively wound on two groups of first cylinders 41 .

[0048] The first winding 21 is wound on the first column 41. Since the first winding frame 4 is made of thermally conductive silicone, which has a certain hardness and can produce a small elastic deformation, the first winding 21 wound on the first column 41 can effectively contact the first column 41, and the heat generated by the first winding 21 can be quickly transferred to the first winding frame 4.

[0049] The second winding frame 5 is used to absorb the heat of the iron core 1 and the winding assembly 2 when the inductor is operating. The second winding frame 5 is detachably connected to the first winding frame 4. The second winding frame 5 includes two groups of second columns 51. A second channel is arranged in the second column 51. The second channel is connected to the first channel when the second winding frame 5 is connected to the first winding frame 4.

[0050] After the second winding frame 5 is installed on the reactor, it can absorb the heat generated by the iron core 1 and the winding assembly 2 when the reactor is in operation. Similar to the first winding frame 4, the second winding frame 5 is also composed of a plurality of second columns 51, the number of which is not less than 4, and can also be made of a material with good thermal conductivity and insulation, such as high-temperature resistant thermal conductive silicone. After the second winding frame 5 is connected to the first winding frame 4, it is installed on the reactor, and the second channel extends along the length direction of the second column 51.

[0051] The winding assembly 2 further includes two second windings 22 , which are respectively wound on the outer surfaces of the two groups of second cylinders 51 .

[0052] The resistance loss generated when the current passes through the wire causes the wire to heat up, which in turn causes the entire winding assembly 2 to heat up. The heating of the winding assembly 2 may also cause the overall temperature of the reactor to rise. At the same time, the winding will also undergo thermal expansion when heated, which may cause the size of the winding to change, thereby affecting the structural stability of the reactor. In addition, high temperature may accelerate the aging of the insulating material of the winding assembly 2, thereby reducing the insulation performance of the reactor and increasing the risk of failure. The heat generated by the winding assembly 2 is actually the process of converting electrical energy into thermal energy. This part of the energy loss will cause the efficiency of the reactor to decrease.

[0053] In this embodiment, after the second winding frame 5 is installed on the reactor, the second winding 22 surrounds the first winding 21 , and the two second windings 22 are wound on the second column 51 . The heat generated during the operation of the reactor can be effectively transferred to the second winding frame 5 .

[0054] like Figure 6 As shown, in the present technical solution, the differential common-mode reactor acts on a single-phase circuit and has four windings. The inner and outer windings on the first winding column 111 are respectively A1-A winding and C1-C winding, and the inner and outer windings on the second winding column 112 are respectively D1-D winding and B1-B winding. The A1-A winding has the same number of turns as the D1-D winding, and is connected in series externally through a short-circuit bar. The C1-C winding has the same number of turns as the B1-B winding, and is also connected in series externally through a short-circuit bar. The winding directions of the four sets of windings are the same, which reduces the complexity and makes the production process relatively simple.

[0055] In the above technical solution, due to the mutual inductance of the two sets of windings, the total inductance after series connection is greater than 2 times the self-inductance. According to L = AL * N 2, where L represents inductance, AL represents inductance coefficient, and N represents number of winding turns. Therefore, under the condition of the same core cross section, the same common-mode inductance is obtained, and the number of turns is reduced geometrically, which greatly reduces the number of winding turns. The number of turns can be reduced by one third, thereby reducing costs and reducing volume. Because the number of winding turns of the two sets of common-mode reactors is very small, and the inner and outer layer winding structure is adopted, the differential mode inductance value is greatly effectively reduced. When the differential common-mode reactor is working, the heat between the windings and in the narrow space between the windings and the core 1 can be effectively transferred to the first winding frame 4 and the second winding frame 5.

[0056] The exhaust end of the first fan 7 is connected to the first channel. The first fan 7 extracts gas in the first channel and the second channel to dissipate heat from the first winding frame 4 and the second winding frame 5, thereby achieving cooling of the reactor.

[0057] When the reactor is in operation, the first fan 7 can extract the heat in the first channel and the second channel, so that the first winding frame 4 and the second winding frame 5 can dissipate heat to achieve cooling of the reactor. The rapid dissipation of heat reduces energy loss, improves the energy efficiency ratio of the reactor, and thus improves the operating efficiency of the entire power system. While maintaining the performance of the reactor, it can work more efficiently, which is conducive to improving the working stability of the reactor. Cooling the reactor can also slow down the aging rate of components to extend the service life of the reactor. In addition, the improvement of heat dissipation performance also helps to reduce related equipment failures caused by excessive temperature, reduce maintenance frequency and waste generation, and play a positive role in environmental protection.

[0058] Embodiment 2:

[0059] like Figure 3-Figure 7 As shown, on the basis of Example 1, an air gap 13 is formed between the first iron yoke 11 and the second iron yoke 12, the bottom of each group of second columns 51 is connected to the third connecting part 52, the interior of the third connecting part 52 is connected to all the second channels, the bottom of the third connecting part 52 is also connected to a negative pressure block 53, and the side of the negative pressure block 53 is provided with a negative pressure port connected to the interior of the third connecting part 52, and the negative pressure port faces the air gap 13 when the second winding frame 5 is connected to the first winding frame 4.

[0060] In the present embodiment, when the second winding frame 5 is connected to the first winding frame 4, the negative pressure port faces the air gap 13. Therefore, when the first fan 7 is started, the negative pressure port acts on the air gap 13, so that the hot gas is extracted, and the hot gas in the air gap 13 can be effectively extracted, reducing heat accumulation, promoting the rapid discharge of hot gas, and effectively reducing the temperature between the windings and the temperature of the narrow space between the windings and the core 1, so that cold air can enter the air gap 13 more effectively, significantly improving the heat dissipation efficiency of the air gap 13. The negative pressure port should have a certain length in the vertical direction to adapt to the change of the air gap 13, and it should be ensured that no matter how the air gap 13 changes, the adsorption effect generated by the negative pressure port can effectively act on the air gap 13.

[0061] At the same time, when the hot gas in the air gap 13 is extracted, due to the dynamic effect of the airflow, the cold air with a lower temperature near the air gap 13 is also extracted, so that the cold air with a lower temperature flows together. The temperature of the airflow formed after the hot gas and the cold air are mixed is relatively low. When passing through the first winding frame 4 and the second winding frame 5, it is still possible to achieve cooling in the narrow space between the windings and between the windings and the iron core 1.

[0062] Embodiment three:

[0063] like Figure 8-Figure 10 As shown, on the basis of Example 1 or Example 2, the inductor also includes a heat dissipation cover 8, the heat dissipation cover 8 includes a shell 81, the shell 81 is installed on the top of the first iron yoke 11, a third channel 83 is formed between the shell 81 and the first iron yoke 11, an air inlet 831 is provided at one end of the third channel 83, and a second fan 82 with an exhaust end facing the third channel 83 is installed at the top of the shell 81 away from the air inlet 831.

[0064] Due to factors such as heat conduction and air convection, the temperature of the top of the reactor may be slightly higher than that of the bottom. By installing a heat dissipation cover 8 on the top of the first iron yoke 11, the top of the reactor can be cooled. When the second fan 82 is working, the air outside the heat dissipation cover 8 enters the third channel 83 from the air inlet 831 and is discharged from the second fan 82, thereby effectively cooling the top of the first iron yoke 11.

[0065] A plurality of heat-conducting pipes 6 are connected between the first fan 7 and the first channel. The plurality of heat-conducting pipes 6 penetrate the first iron yoke 11 and the third channel 83 and are distributed at intervals in the third channel 83 .

[0066] Through the configuration of the third channel 83 between the shell 81 of the heat dissipation cover 8 and the first iron yoke 11 and the second fan 82, an efficient heat dissipation path is formed, which promotes air convection, so that the heat on the top of the reactor can be quickly dissipated, thereby reducing the overall temperature of the reactor. When the first fan 7 extracts the hot air in the first channel and the second channel, since it passes through the third channel 83, when the second fan 82 dissipates heat on the top of the first iron yoke 11, the airflow in the third channel 83 can cool the heat pipe 6 when passing through the heat pipe 6. The heat pipe 6 is also made of a material with good thermal conductivity and insulation, such as high-temperature resistant thermal conductive silicone. The heat pipe 6 distributed at intervals can effectively increase the contact area between the heat pipe 6 and the airflow in the third channel 83, thereby improving the cooling effect on the heat pipe 6. If the cooling speed of the heat pipe 6 is fast, it can accelerate the heat dissipation of the narrow space between the windings and between the windings and the iron core 1.

[0067] Embodiment 4:

[0068] like Figure 7 , Fig.11 and Fig.12 As shown, on the basis of Example 1, Example 2 or Example 3, a second rod body 32 is connected between the first iron yoke 11 and the second iron yoke 12, and the first iron yoke 11 and the second iron yoke 12 are both sleeved on the outer surface of the second rod body 32. The first iron yoke 11 or the second iron yoke 12 can move along the axial direction of the second rod body 32, and the air gap 13 is increased or decreased due to the movement of the first iron yoke 11 or the second iron yoke 12.

[0069] In this embodiment, one end of the second rod body 32 can be fixedly connected to the second iron yoke 12. At this time, the other end of the second rod body 32 is passed through the first iron yoke 11 so that the first iron yoke 11 can slide along the second rod body 32. The first iron yoke 11 moves along the second rod body 32 to adjust the size of the air gap 13.

[0070] The first rod body 3 is also connected between the first iron yoke 11 and the second iron yoke 12 , and the first iron yoke 11 or the second iron yoke 12 moves due to the rotation of the first rod body 3 .

[0071] Specifically, one end of the first rod body 3 can be rotatably connected to the second iron yoke 12 , and the other end can be threadedly connected to the first iron yoke 11 , and the first iron yoke 11 can be adjusted to slide along the second rod body 32 by rotating the first rod body 3 .

[0072] In this embodiment, the differential common mode reactor also includes: a temperature sensor, a processor and a servo motor 31; the temperature sensor is used to monitor the temperature in the air gap 13; the processor is used to obtain the monitored temperature and determine the interval in which the monitored temperature is located, and drive the servo motor 31 to rotate forward or reverse a specified angle when the monitored temperature changes in the interval; the servo motor 31 is used to drive the first rod 3 to rotate.

[0073] The monitoring end of the temperature sensor is arranged in the air gap 13 so as to monitor the temperature in the air gap 13. The processor continuously obtains the temperature in the air gap 13, presets a temperature interval, monitors the temperature change interval, and drives the servo motor 31 to rotate so that the first iron yoke 11 is away from the second iron yoke 12 when the monitored temperature changes to a higher temperature interval, thereby increasing the air gap 13. After the air gap 13 increases, the magnetization degree of the core 1 can be reduced, thereby reducing the hysteresis loss and eddy current loss of the core 1. At the same time, the negative pressure block 53 extracts a larger amount of air from the air gap 13, and the reactor can be effectively cooled down by mutual cooperation. After the reactor is cooled down, the monitored temperature changes to a lower temperature interval. The servo motor 31 can drive the first iron yoke 11 to approach the second iron yoke 12 through the first rod body 3, thereby reducing the air gap 13. After the air gap 13 is reduced, the conduction path of the magnetic field in the core 1 becomes shorter, and more magnetic flux lines pass through the core 1, thereby causing the magnetic field to be more concentrated in the core 1, increasing the value of the common mode inductance.

[0074] The above technical solution can monitor and adjust the temperature in the air gap 13 in real time, and can automatically adjust the size of the air gap 13 according to temperature changes. When the temperature rises, the air gap 13 is increased, the magnetization degree is reduced, and the heat generated by the hysteresis loss and eddy current loss of the iron core 1 is reduced. When the temperature rises, the air gap 13 is reduced, and the value of the common-mode inductance is increased. By comprehensively considering the electrical performance and the heat dissipation effect, a larger common-mode inductance can be ensured as much as possible without affecting the heat dissipation.

[0075] Embodiment five:

[0076] like Figure 4 , Figure 5 and Fig.13 As shown, on the basis of any one of embodiments one to four, the first winding frame 4 also includes a first connecting portion 42 and a second connecting portion 43, which are respectively connected to the top and the bottom of a single group of first columns 41, and the interiors of the first connecting portion 42 and the second connecting portion 43 are both connected to the first channel, a first joint 511 is provided on the top of the second column 51, and the first joint 511 is movably plugged with the first connecting portion 42, and the second channel is connected to the interior of the first connecting portion 42 when the first joint 511 is plugged with the first connecting portion 42, and a second joint 521 is provided on the top of the third connecting portion 52, and the second joint 521 is plugged with the second connecting portion 43 when the first joint 511 is plugged with the first connecting portion 42, and the interior of the third connecting portion 52 is connected to the interior of the second connecting portion 43 when the second joint 521 is plugged with the second connecting portion 43.

[0077] Since the first winding 21 and the second winding 22 are respectively wound on the first winding frame 4 and the second winding frame 5, the movable plug-in design of the first joint 511 and the second joint 521 enables the second winding frame 5 to be easily and quickly assembled on the first winding frame 4, thereby enhancing the stability of the structure and facilitating the rapid installation and maintenance of the reactor. Sealing rings can be provided on the first joint 511 and the second joint 521. By providing the sealing rings, the gap at the connection can be effectively filled, and the airflow can be effectively prevented from leaking from the connection during heat dissipation.

[0078] The first connecting portion 42 and the second connecting portion 43 are respectively used to connect the top and the bottom of each first channel, so that all the first channels of a single group of first columns 41 constitute an integral space. By setting the first joint 511 and the second joint 521, after the second winding frame 5 is assembled on the first winding frame 4, the top of the first channel can be connected with the top of the second channel, and the bottom of the first channel can be connected with the bottom of the second channel. Then, when the first fan 7 draws hot air in the first channel, the airflow can flow more evenly from the bottom of the first channel and the bottom of the second channel to the top of the first channel and the top of the second channel, thereby uniformly dissipating the heat of the first winding frame 4 and the second winding frame 5, which is beneficial to improving the heat dissipation effect of the inductor.

[0079] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0080] What has been described above is only a preferred specific implementation manner of the embodiments of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. Single-phase differential common mode reactor, including: An iron core (1), the iron core (1) comprising a first iron yoke (11) and a second iron yoke (12), the first iron yoke (11) having a first winding column (111) and a second winding column (112), characterized in that it also comprises: a first winding frame (4), the first winding frame (4) being used to absorb heat of the iron core (1) when the reactor is in operation, the first winding frame (4) comprising two groups of first columns (41), the two groups of first columns (41) being respectively mounted on the first winding column (111) and the second winding column (112), and a first channel being arranged inside the first column (41); A winding assembly (2) used for transferring heat to the first winding frame (4) when the reactor is in operation, the winding assembly (2) comprising two first windings (21), the two first windings (21) being respectively wound on two groups of the first cylinders (41); a second winding frame (5), the second winding frame (5) being used to absorb heat from the iron core (1) and the winding assembly (2) when the reactor is in operation, the second winding frame (5) being detachably connected to the first winding frame (4), the second winding frame (5) comprising two groups of second columns (51), a second channel being arranged in the second columns (51), the second channel being connected to the first channel when the second winding frame (5) is connected to the first winding frame (4); The winding assembly (2) further comprises two second windings (22), wherein the two second windings (22) are respectively wound on the outer surfaces of two groups of the second cylinders (51); A first fan (7) has an air extraction end connected to the first channel. The first fan (7) extracts gas from the first channel and the second channel to dissipate heat from the first winding frame (4) and the second winding frame (5), thereby achieving cooling of the reactor.

2. The single-phase differential common mode reactor according to claim 1, wherein an air gap (13) is formed between the first iron yoke (11) and the second iron yoke (12), wherein: The bottom of each group of the second columns (51) is connected to a third connecting portion (52), the interior of the third connecting portion (52) is connected to all the second channels, the bottom of the third connecting portion (52) is also connected to a negative pressure block (53), the side of the negative pressure block (53) is provided with a negative pressure port connected to the interior of the third connecting portion (52), and the negative pressure port faces the air gap (13) when the second winding frame (5) is connected to the first winding frame (4).

3. The single-phase differential common mode reactor according to claim 1, characterized in that: The reactor also includes a heat dissipation cover (8), the heat dissipation cover (8) including a shell (81), the shell (81) being mounted on the top of the first iron yoke (11), a third channel (83) being formed between the shell (81) and the first iron yoke (11), an air inlet (831) being provided at one end of the third channel (83), and a second fan (82) with an air exhaust end facing the third channel (83) being mounted on the top of the shell (81) away from the air inlet (831).

4. The single-phase differential common mode reactor according to claim 3, characterized in that: A plurality of heat-conducting pipes (6) are connected between the first fan (7) and the first channel. The plurality of heat-conducting pipes (6) are arranged through the first iron yoke (11) and the third channel (83) and are distributed at intervals in the third channel (83).

5. The single-phase differential common mode reactor according to claim 2, characterized in that: A second rod body (32) is connected between the first iron yoke (11) and the second iron yoke (12); the first iron yoke (11) and the second iron yoke (12) are both sleeved on the outer surface of the second rod body (32); the first iron yoke (11) or the second iron yoke (12) can move along the axial direction of the second rod body (32); and the air gap (13) is increased or decreased due to the movement of the first iron yoke (11) or the second iron yoke (12).

6. The single-phase differential common mode reactor according to claim 5, characterized in that: A first rod body (3) is also connected between the first iron yoke (11) and the second iron yoke (12), and the first iron yoke (11) or the second iron yoke (12) moves due to the rotation of the first rod body (3).

7. The single-phase differential common mode reactor according to claim 6, characterized in that: Also includes: temperature sensor, processor and servo motor (31); The temperature sensor is used to monitor the temperature in the air gap (13); The processor is used to obtain the monitored temperature and determine the interval in which the monitored temperature is located, and drive the servo motor (31) to rotate forward or reverse by a specified angle when the monitored temperature changes. The servo motor (31) is used to drive the first rod body (3) to rotate.

8. The single-phase differential common mode reactor according to claim 2, characterized in that: The first winding frame (4) further comprises a first connecting portion (42) and a second connecting portion (43), the first connecting portion (42) and the second connecting portion (43) being connected to the top and the bottom of a single group of the first columns (41) respectively, the interiors of the first connecting portion (42) and the second connecting portion (43) being both connected to the first channel, a first joint (511) being arranged at the top of the second column (51), the first joint (511) being movably plugged with the first connecting portion (42), the second channel being connected to the interior of the first connecting portion (42) when the first joint (511) is plugged with the first connecting portion (42), a second joint (521) being arranged at the top of the third connecting portion (52), the second joint (521) being plugged with the second connecting portion (43) when the first joint (511) is plugged with the first connecting portion (42), the interior of the third connecting portion (52) being connected to the interior of the second connecting portion (43) when the second joint (521) is plugged with the second connecting portion (43).

9. The single-phase differential common mode reactor according to claim 4, characterized in that: The first winding frame (4), the second winding frame (5) and the heat-conducting pipe (6) are all made of high-temperature resistant heat-conductive silicone.

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