Electric reactor and power conversion equipment

Abstract

The invention relates to an electric reactor and power conversion equipment, and the electric reactor comprises a skeleton and an electromagnetic assembly disposed on the skeleton. The framework comprises a base and two supporting parts which are arranged on the base in a spaced mode in the first direction, a mounting area is defined by the base and the supporting parts, the base is provided with first ventilation holes, the supporting parts are provided with second ventilation holes, and the mounting area can be communicated with the outside through the first ventilation holes and the second ventilation holes; the electromagnetic assembly comprises a magnetic core and a winding wound around the magnetic core, the two ends, in the first direction, of the magnetic core are supported on the two supporting parts respectively, and the winding is located in the installation area. The framework structure of the electric reactor is optimized, and the heat dissipation efficiency of the electric reactor is improved under the condition that the heat dissipation air volume and the sectional areas of the winding and the magnetic core are not changed.

Description

Technical Field

[0001] This application relates to the field of power electronics technology, specifically to a reactor and a power conversion device. Background Technology

[0002] Reactors are one of the main heat-generating components in power equipment. The windings and magnetic core of the reactor generate heat during operation. If the heat cannot be dissipated in a timely and effective manner, it will cause the overall temperature of the reactor to rise too high.

[0003] In related technologies, air cooling is usually used to dissipate heat from reactors. However, existing reactors have poor heat dissipation capabilities. Summary of the Invention

[0004] This application provides a reactor and a power conversion device. By optimizing the reactor's skeleton structure, the heat dissipation efficiency of the reactor is improved without changing the heat dissipation airflow or the cross-sectional area of ​​the windings and magnetic core.

[0005] This application provides a reactor, including a frame and an electromagnetic assembly mounted on the frame; the frame includes a base and two support portions spaced apart from the base along a first direction, the base and the support portions enclosing an installation area, the base having a first ventilation hole, the support portions having a second ventilation hole, and the installation area communicating with the outside through the first ventilation hole and the second ventilation hole respectively; the electromagnetic assembly includes a magnetic core and a winding wound around the magnetic core, the two ends of the magnetic core along the first direction being supported by the two support portions respectively, and the winding being located within the installation area.

[0006] In some embodiments, the support portion has a second ventilation hole on the side facing the base.

[0007] In some embodiments, the edge of the support portion facing the base is a first edge, the first edge is provided with a first notch, the support portion is connected to the base, and a second ventilation hole is formed at the first notch.

[0008] In some embodiments, the frame further includes a guide portion having a guide channel communicating with the second ventilation hole. The guide portion includes a first end and a second end, the first end being located on the side facing the mounting area and the second end being located on the side away from the mounting area. The guide channel tapers from the second end to the first end.

[0009] In some embodiments, the guide portion includes two guide blocks spaced apart along a second direction, at least one of the base and the support portion is connected to or integrally formed with the guide blocks, and the opposite side walls of the two guide blocks are respectively provided with guide surfaces to form the guide channels, wherein the first direction is perpendicular to the second direction.

[0010] In some embodiments, the frame further includes a partition disposed on the base, the partition being disposed on one side of the mounting area, and when the frame has at least two mounting areas, the partition is disposed between two adjacent mounting areas; the ventilation hole includes a third ventilation hole disposed on the partition.

[0011] In some embodiments, the partition has a second notch at one end facing the base, the partition is connected to the base, and the third ventilation hole is formed by surrounding the second notch.

[0012] In some embodiments, the partition is further provided with a separator extending into the mounting area, the separator being used to separate the windings and form an inter-turn gap.

[0013] In some embodiments, the partition has a guide portion on the side away from the base, the guide portion protruding from the side surface of the partition facing the mounting area.

[0014] In some embodiments, the guide portion includes a third end and a fourth end, the third end facing the windward side and the fourth end facing the leeward side, the third end being located on the side of the fourth end away from the base.

[0015] In some embodiments, the electromagnetic component further includes a magnetic yoke, with one end of each magnetic core along a first direction connected by a set of magnetic yokes, and the other end of each magnetic core along the first direction connected by another set of magnetic yokes; the magnetic yoke includes a magnetic yoke body, which is formed by stacking a plurality of silicon steel sheets along the height direction, some of the silicon steel sheets having extensions that extend out of the magnetic yoke body, the extensions located on the same side of the magnetic yoke being spaced apart along the height direction, and a heat dissipation gap being formed between two adjacent extensions.

[0016] This application also provides a power conversion device, including the reactor described above.

[0017] The reactor and power conversion equipment provided in this application have the following technical advantages:

[0018] When the reactor is cooled by cooling air, the cooling air can enter the mounting area through the first ventilation hole and the second ventilation hole, and cool the windings, magnetic cores and other components in the mounting area. This reduces the obstruction of the frame to the cooling air entering the mounting area, and facilitates the entry and exit of the cooling air into the mounting area. This increases the amount of cooling air entering the mounting area, so that the heat generated by the electromagnetic components can be dissipated in a timely and effective manner, reducing the overall temperature of the device, improving the current carrying capacity of the windings, and enhancing the overall stability.

[0019] Furthermore, compared to conventional methods for improving the heat dissipation efficiency of reactors, such as increasing the heat dissipation airflow, increasing the cross-sectional area of ​​the windings, or increasing the cross-sectional area of ​​the magnetic core, this application optimizes the structure of the frame to increase the airflow to the windings and improve heat dissipation efficiency without increasing the volume. This reduces the requirements for installation space, facilitates the miniaturization of the reactor as a whole, and results in a simple, easy-to-implement, low-cost, and economical overall structure. Attached Figure Description

[0020] Figure 1 This is a top view of a reactor provided in an embodiment of this application;

[0021] Figure 2 yes Figure 1 Top view of the central skeleton;

[0022] Figure 3 This is a structural diagram when the skeleton is a single piece.

[0023] Figure 4 This is a structural diagram from another perspective when the skeleton is a one-piece structure;

[0024] Figure 5 This is a structural diagram when the skeleton is a split structure;

[0025] Figure 6 yes Figure 5 Schematic diagram of the middle base;

[0026] Figure 7 yes Figure 5 Schematic diagram of the central support section;

[0027] Figure 8 yes Figure 5 Side view;

[0028] Figure 9 yes Figure 5 A schematic diagram of the partition structure in the middle;

[0029] Figure 10 This is a top view of the skeleton including the guide section;

[0030] Figure 11 yes Figure 10Schematic diagram of the structure of the guide section;

[0031] Figure 12 It is a reactor with Figure 10 The diagram shows the structure of the skeleton.

[0032] Figure 13 This is a structural diagram of the frame when the partition has spacers;

[0033] Figure 14 It is a reactor with Figure 13 The diagram shows the structure of the skeleton.

[0034] Figure 15 yes Figure 14 Top view;

[0035] Figure 16 This is a structural diagram of the frame when the partition has a guide section;

[0036] Figure 17 yes Figure 16 Side view;

[0037] Figure 18 It is a reactor with Figure 16 The diagram shows the structure of the skeleton.

[0038] Figure 19 This is a schematic diagram of the structure of a reactor with extended fins on its magnetic yoke;

[0039] Figure 20 This is a top view of the magnetic yoke with extended fins;

[0040] Figure 21 yes Figure 20 A schematic diagram of a magnetic yoke with extended fins.

[0041] Appendix Figures 1-21 The reference numerals in the attached figures are explained as follows:

[0042] 10. Frame; 20. Electromagnetic components; 202. Winding; 2011. Inter-turn gap; 202. Magnetic core; 203. Magnetic yoke; 2031. Magnetic yoke body; 2032. Extension; 2033. Heat dissipation gap.

[0043] 1. Installation area; 11. First installation area; 12. Second installation area;

[0044] 2. Base, 21. First ventilation hole, 22. Through hole, 23. First insertion hole, 24. Second insertion hole;

[0045] 3 Support part, 31 Second ventilation hole, 32 Support hole, 321 Hole bottom wall, 33 First edge, 34 First connector, 35 First notch;

[0046] 4 partition, 41 third ventilation hole, 42 second edge, 43 second notch, 44 separator, 45 guide, 451 third end, 452 fourth end, 46 second connector;

[0047] 5 guide section, 51 guide channel, 52 first end, 53 second end, 54 guide block, 55 guide surface. Detailed Implementation

[0048] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0049] The reactor is one of the main heat-generating components in a photovoltaic inverter. The windings and core of the reactor generate heat during operation. If this heat cannot be dissipated effectively and in a timely manner, the overall temperature of the reactor will rise excessively. Cooling is typically achieved through air cooling. To reduce heat buildup, the cooling efficiency can be improved by increasing the airflow, increasing the cross-sectional area of ​​the windings, or increasing the cross-sectional area of ​​the core. However, this method incurs additional costs and is not economically viable.

[0050] This application provides an embodiment of a reactor, such as... Figure 1 and Figure 2 As shown, the reactor includes a frame 10 and an electromagnetic assembly 20 mounted on the frame 10. The frame 10 includes a base 2 and two support portions 3 located on the same surface of the base 2. The two support portions 3 are spaced apart along a first direction on the base 2, forming a mounting area 1 between the base 2 and the two support portions 3. The electromagnetic assembly 20 includes a magnetic core 202 and a winding 201 wound around the magnetic core 202. The magnetic core 202 extends along the first direction, and its two ends along the first direction are respectively supported by the two support portions 3. The winding 201 is located within the mounting area 1.

[0051] like Figure 3 and Figure 4 As shown, the base 2 is provided with a first ventilation hole 21, and the installation area 1 can be connected to the outside through the first ventilation hole 21, so as to facilitate heat dissipation and improve the heat dissipation effect.

[0052] The base 2 may also be provided with a through hole 22 and a connection hole. The through hole 22 is used to install electrical components, and the connection hole can be used to connect with other components by means of bolts, plugs, snaps, etc. The connection end of the electrical component can pass through the through hole 22 and connect to the circuit board of the electromagnetic component 20. In the installed state, the through hole 22 is blocked by the connection end of the electrical component, and the connection hole is blocked by bolts or other connectors. The first ventilation hole 21 is not blocked and is connected to the installation area 1 to achieve ventilation.

[0053] The support part 3 is provided with a second ventilation hole 31. The mounting area 1 can be connected to the outside through the second ventilation hole 31. The cooling air blows towards the reactor and towards the support part 3. As an example, the axis of the second ventilation hole 31 can be approximately parallel to the flow direction of the cooling air, which is conducive to the cooling air entering the mounting area 1 through the second ventilation hole 31 to dissipate heat from the winding 201 and the magnetic core 202 located in the mounting area 1, resulting in a better heat dissipation effect.

[0054] Furthermore, the two sets of support parts 3 arranged along the first direction are respectively provided with second ventilation holes 31, which facilitates convection, improves the ventilation effect of the installation area 1, and thus improves the heat dissipation effect on the winding 201 and the magnetic core 202.

[0055] When the reactor is cooled by the cooling air, the cooling air can enter the mounting area 1 through the first ventilation hole 21 and the second ventilation hole 31, and cool the winding 201, magnetic core 202 and other components in the mounting area 1. This reduces the obstruction of the frame 10 to the cooling air entering the mounting area 1, and facilitates the entry and exit of the cooling air into the mounting area 1. This increases the amount of cooling air entering the mounting area 1, so that the heat generated by the electromagnetic component 20 can be dissipated in a timely and effective manner, reducing the overall temperature of the device, improving the current carrying capacity of the winding 201, and enhancing the overall stability.

[0056] Furthermore, compared to conventional solutions for improving the heat dissipation efficiency of reactors, such as increasing the heat dissipation airflow, increasing the cross-sectional area of ​​winding 201, or increasing the cross-sectional area of ​​magnetic core 202, the solution provided in this embodiment optimizes the structure of the frame 10. This increases the airflow to winding 201 to improve heat dissipation efficiency without increasing the volume, reducing the requirements for installation space, facilitating the overall miniaturization of the reactor, and resulting in a simple, easy-to-implement, low-cost, and economical overall structure.

[0057] The frame 10 can be made of insulating, high thermal conductivity plastic with good thermal conductivity. The frame 10 can be, for example... Figure 3 and Figure 4 As shown, the entire structure is designed as a single piece. In this case, the support part 3 and the base 2 are integrally formed, resulting in a simple overall structure that simplifies installation and improves efficiency. Alternatively, the components of the frame 10 can be separate structures connected to form the overall frame 10. In this case, the support part 3 and the base 2 are separate structures, such as... Figure 5 , Figure 6 and Figure 7 As shown, the base 2 may be provided with a first insertion hole 23, and the support part 3 forms a first edge 33 on one side of the base 2. The first edge 33 is provided with a first insertion member 34. During installation, the first insertion member 34 is inserted into the first insertion hole 23 to achieve connection. Of course, there are no restrictions on the connection method between the support part 3 and the base 2. For example, the two can also be connected by adhesive or other methods.

[0058] Furthermore, in this embodiment, the structure of the support part 3 is not limited. The support part 3 can be located on the base 2 and provide support to the magnetic core 202 from the side facing the base 2, or it can be as follows: Figure 5 As shown, the support part 3 is provided with a support hole 32. The side wall of the support hole 32 facing the base 2 is the bottom wall 321. The magnetic core 202 passes through the support hole 32 and can be supported by the bottom wall 321.

[0059] like Figure 5 As shown, the support part 3 is provided with a second ventilation hole 31 at one end facing the base 2. This arrangement can reduce the obstruction of the second ventilation hole 31 by the magnetic yoke 203 of the electromagnetic component 20, and facilitate the heat dissipation air to enter and exit the installation area 1 through the second ventilation hole 31.

[0060] Of course, there are no restrictions on the number and location of the second ventilation holes 31. For example, the second ventilation holes 31 can also be set on the side of the support part 3 away from the base 2. The support part 3 is used to provide support for the electromagnetic component 20. While meeting the structural strength requirements, the number and cross-sectional area of ​​the second ventilation holes 31 can be increased as much as possible.

[0061] When the support part 3 and the base 2 are separate structures, such as Figure 5 and Figure 7 As shown, the support part 3 has a first notch 35 on its first edge 33 facing the base 2. When the support part 3 and the base 2 are connected, the first edge 33 fits against the base 2 and forms the second ventilation hole 31 at the first notch 35. Of course, in this embodiment, the second ventilation hole 31 can also be formed by setting a hole structure in the support part 3. However, forming the second ventilation hole 31 by setting the first notch 35 on the first edge 33 can simplify the overall structure and molding process.

[0062] The frame 10 also includes partitions 4, which are disposed on the base 2. When the frame 10 has one mounting area 1, partitions 4 are disposed on one or both sides of the mounting area 1. When the frame 10 has two or more mounting areas 1, the mounting areas 1 are arranged at intervals along the second direction, and the first and second directions are perpendicular to each other. Figure 5 As shown, a partition 4 is provided between two adjacent installation areas 1. Each installation area 1 is provided with a set of windings 201 and magnetic cores 202, which are separated by the partition 4 to meet the safety requirements of each winding 201 and magnetic core 202.

[0063] like Figure 8As shown, the ventilation holes provided on the frame 10 also include a third ventilation hole 41 provided on the partition 4. The third ventilation hole 41 is connected to the installation area 1. The third ventilation hole 41 can reduce the obstruction of the partition 4 on the heat dissipation air entering and exiting the installation area 1, increase the air volume entering and exiting the installation area 1, thereby improving the heat dissipation efficiency of the winding 201 and the magnetic core 202.

[0064] The third ventilation hole 41 provided in the partition 4 is connected to the two adjacent installation areas 1. The third ventilation hole 41 can also realize the connection between each installation area 1, so that the heat in the installation area 1 with higher temperature can be discharged to the adjacent installation area 1 through the third ventilation hole 41, thereby improving the temperature uniformity in each installation area 1 and reducing the possibility of failure due to excessively high temperature caused by local heat accumulation.

[0065] The partition 4 can be an integrally formed structure with the base 2 to simplify the overall structure, or the partition 4 can be a separate structure connected to the base 2, such as... Figure 9 As shown, the partition 4 forms a second edge 42 on one side of the base 2. The second edge 42 may be provided with a second plug-in member 46, and the base 2 is provided with a corresponding second plug-in hole 24. The connection is achieved by plugging the second plug-in member 46 into the second plug-in hole 24. Alternatively, the partition 4 and the base 2 may be connected by means of adhesive bonding or other methods.

[0066] In this embodiment, the location of the third ventilation hole 41 is not limited, such as Figure 8 As shown, placing the third ventilation hole 41 on the side of the partition 4 facing the base 2 facilitates the flow of cooling air between different installation areas 1, improving the heat dissipation effect. Of course, the third ventilation hole 41 can also be placed in other locations on the partition 4, such as... Figure 9 The position shown by the dashed line in the middle of partition 4 is acceptable.

[0067] The cooling air entering the installation area 1 through the second ventilation hole 31 can flow between different installation areas 1 through the third ventilation hole 41, and can be dissipated through the side of the installation area 1 away from the base 2, the first ventilation hole 21 and the second ventilation hole 31, so as to improve the heat dissipation effect in each installation area 1.

[0068] When the partition 4 and the base 2 are separate structures, the third ventilation hole 41 can be a hole structure opened in the partition 4, or it can be as follows: Figure 8 and Figure 9 As shown, the partition 4 has a second notch 43 on its second edge 42 facing the base 2. After the partition 4 is connected to the base 2, the second edge 42 fits against the base 2 and forms a third ventilation hole 41 at the second notch 43. This simplifies the molding process of the third ventilation hole 41 and reduces costs.

[0069] The frame 10 is enclosed by the base 2, the support 3 and the partition 4 to form an installation area 1 arranged along the second direction. The base 2, the support 3 and the partition 4 respectively form the wall of the installation area 1. By opening ventilation holes (including the first ventilation hole 21, the second ventilation hole 31 and the third ventilation hole 41) in the wall, it is possible to facilitate the entry and exit of heat dissipation air in each installation area 1, reduce the obstruction of heat dissipation air by the frame 10, increase the air volume of heat dissipation air entering and exiting each installation area 1, and improve the heat dissipation effect of the winding 201 and the magnetic core 202 in the installation area 1.

[0070] There are no restrictions on the shape, structure, or size of the ventilation holes (including the first ventilation hole 21, the second ventilation hole 31, and the third ventilation hole 41). Provided that the structural strength requirements are met, the more ventilation holes there are and the larger their cross-sectional area, the better the heat dissipation efficiency will be. The ventilation holes can be of at least one regular shape, such as square, strip, or round, or an irregular shape.

[0071] To further improve heat dissipation, such as Figure 10 , Figure 11 and Figure 12 As shown, the frame 10 also includes a guide portion 5, which has a guide channel 51 that communicates with the second ventilation hole 31. The guide portion 5 includes a first end 52 and a second end 53, wherein the first end 52 faces the mounting area 1 and the second end 53 is away from the mounting area 1. The guide channel 51 gradually narrows from the second end 53 to the first end 52, thereby providing a guiding effect for the external cooling air, allowing more cooling air to enter the mounting area 1 through the second ventilation hole 31, increasing the amount of cooling air entering the mounting area 1 through the second ventilation hole 31, and improving the cooling effect. Furthermore, since the guide channel 51 gradually narrows from the second end 53 to the first end 52, the cooling air will have a smaller cross-sectional area as it flows from the second end 53 to the first end 52, resulting in an increased wind speed, which facilitates the rapid dissipation of heat from the mounting area 1 and improves the cooling effect.

[0072] like Figure 10 and Figure 11 As shown, the guide portion 5 includes two guide blocks 54, which are spaced apart along a second direction. At least one of the base 2 and the support portion 3 is integrally formed with or connected to the guide blocks 54. Guide surfaces 55 are respectively provided on opposite side walls between the two guide blocks 54, forming the aforementioned guide channel 51 between the guide surfaces 55 of the two guide blocks 54. The guide surface 55 can be an inclined surface or an arc surface; no limitation is made here.

[0073] Of course, in this embodiment, the specific structure of the guide part 5 is not limited. For example, the guide part 5 can also be set as a conical structure, etc. Setting the guide part 5 as a structure including two guide blocks 54 can simplify the structure and molding process of the guide part 5.

[0074] The guide block 54 can be connected to or integrally formed with the support part 3, or it can be connected to or integrally formed with the base 2. Alternatively, the guide block 54 can be connected to both the base 2 and the support part 3. If the support part 3 and the base 2 are an integral structure, then the guide block 54, the support part 3, and the base 2 can also be an integral structure. The provision of the guide part 3 also helps to enhance the structural strength of the base 2 and the support part 3.

[0075] Of course, in this embodiment, the second ventilation hole 31 can also be set as a guide hole to accelerate the heat dissipation air entering the installation area 1 through the second ventilation hole 31 and improve the heat dissipation effect. When the guide part 5 is set on the side of the second ventilation hole 31 away from the installation area 1 to accelerate the heat dissipation air, the flow area of ​​the second ventilation hole 31 is increased while occupying the same space, thereby increasing the air volume entering the installation area 1 and improving the heat dissipation effect.

[0076] In this embodiment, there is no limitation on the number and position of the guide part 5. It is possible that all the second ventilation holes 31 are provided with guide parts 5, or that some of the second ventilation holes 31 are provided with guide parts 5. The guide channel 51 of a guide part 5 can be connected to only one second ventilation hole 31 or to at least two second ventilation holes 31.

[0077] like Figure 10 and Figure 12 In the embodiment shown, the frame 10 is provided with three mounting areas 1, each mounting area 1 is spaced apart along the second direction, and a partition 4 is provided between two adjacent mounting areas 1. For ease of explanation, the mounting area 1 located in the middle is referred to as the first mounting area 11, and the two mounting areas 1 located on both sides of the first mounting area 11 are referred to as the second mounting areas 12. The first mounting area 11 is located between the two partitions 4, and the second mounting area 12 is only provided with a partition 4 on the side facing the first mounting area 11, and is open on the side away from the first mounting area 11. Therefore, the winding 201 and the magnetic core 202 located in the first mounting area 11 are more likely to generate heat accumulation, resulting in excessive temperature rise.

[0078] When the frame 10 includes the guide portion 5, it can be as follows: Figure 10 and Figure 12As shown, a guide portion 5 is provided corresponding to the second ventilation hole 31 that communicates with the first mounting area 11. The guide portion 5 guides cooling air into the first mounting area 11, improving the heat dissipation effect of the winding 201 and the magnetic core 202 in the first mounting area 11. Of course, to further improve the overall heat dissipation effect, air can also be guided through the guide portion 5 to the second ventilation hole 31 that communicates with the second mounting area 12.

[0079] like Figure 13 As shown, the partition 4 is also provided with a separator 44, which extends into the installation area 1. In the installed state, as... Figure 14 and Figure 15 As shown, the separator 44 is inserted into the winding 201 and separates the winding 201, so that the winding 201 forms an inter-turn gap 205 at the position of the separator 44, which facilitates the flow of heat dissipation air to the inter-turn gap 205 and carries away the heat of the winding 201, which is beneficial to the inter-turn heat dissipation of the winding 201.

[0080] In this embodiment, the structure of the partition 44 is not limited; it can be a partition plate 4 or a partition rod, etc. Each partition plate 4 can have one partition 44 along the first direction, or it can have two or more partitions 44.

[0081] like Figure 16 and Figure 17 As shown, a guide portion 45 is also provided on the side of the partition 4 away from the base 2, and the guide portion 45 protrudes from the surface of the partition 4 facing the mounting area 1. Figure 18 As shown, the installation area 1 has an open structure on the side away from the base 2. The partition 4 has a guide part 45 on the side facing the open structure. The guide part 45 is used to guide the heat dissipation air into the installation area 1, increase the amount of heat dissipation air entering the installation area 1, and thus improve the heat dissipation effect of the installation area 1.

[0082] There are no restrictions on the structure of the guide section 45, such as... Figure 16 and Figure 17 As shown, the guide portion 45 can be an inclined rib structure. The guide portion 45 includes a third end 451 and a fourth end 452, wherein the third end 451 faces the windward side and the fourth end 452 faces the leeward side, and the flow direction of the cooling air is as follows. Figure 17 The direction indicated by the middle arrow is the windward side. Figure 17 The right side of the shown state is the leeward side. Figure 17 The left side of the shown state. The height of the third end 451 is higher than the height of the fourth end 452, that is, the third end 451 is set away from the base 2, and the fourth end 452 is set towards the base 2. In this way, more heat dissipation air can be intercepted and guided into the mounting area 1 through the guide part 45, thereby improving the heat dissipation effect of the mounting area 1. Of course, the guide part 45 can also be set as a rib structure from top to bottom.

[0083] like Figure 19 and Figure 20 As shown, the reactor provided in this application embodiment includes an electromagnetic component 20 and a frame 10 as described above. The electromagnetic component 20 includes a winding 201 and a magnetic core 202, with the winding 201 wound around the magnetic core 202.

[0084] The frame 10 is used to mount the electromagnetic component 20. The winding 201 and the magnetic core 202 are located in the mounting area 1 of the frame 10. By optimizing the structure of the frame 10, the frame 10 is provided with ventilation holes that communicate with the mounting area 1, which can increase the amount of heat dissipation air entering the mounting area 1, improve the heat dissipation effect on the winding 201 and the magnetic core 202 located in the mounting area 1, reduce the situation of the electromagnetic component 20 overheating, improve the current carrying capacity of the winding 201, and have good economic efficiency.

[0085] like Figure 19 and Figure 20 As shown, the electromagnetic component 20 also includes a magnetic yoke 203. There are two sets of magnetic yokes 203, which are respectively disposed at both ends of the magnetic core 202 along the first direction. One end of each magnetic core 202 along the first direction is connected by one set of magnetic yokes 203, and the other end of each magnetic core 202 along the first direction is connected by another set of magnetic yokes 203 to form a closed loop.

[0086] The magnetic yoke 203 includes a magnetic yoke body 2031, which is formed by stacking multiple silicon steel sheets along the height direction. The magnetic yoke body 2031 is equivalent to a single block structure, such as... Figure 21 As shown, some silicon steel sheets are provided with extensions 2032, which extend beyond the magnetic yoke body 2031. The extensions 2032 located on the same side of the magnetic yoke 203 are spaced apart along the height direction, and a heat dissipation gap 2033 is formed between two adjacent extensions 2032. The first direction and the second direction are perpendicular to the height direction.

[0087] Silicon steel sheets of different lengths can be stacked along the height direction, and at least one end of the long silicon steel sheet can extend out of the magnetic yoke body 2031 to form an extension 2032.

[0088] The extension 2032 has a structure similar to forming heat dissipation fins. After passing through the heat dissipation gap 2033 between the extensions 2032, the cooling air can exchange heat with the extensions 2032 and carry away the heat from the magnetic yoke 203, thereby improving the heat dissipation effect on the magnetic yoke 203 and consequently improving the heat dissipation effect on the electromagnetic component 20. Furthermore, the direction of the extensions 2032 and the flow of the cooling air (i.e., as...) Figure 20 The direction indicated by the middle arrow is parallel, which is conducive to the heat dissipation air entering the heat dissipation gap 2033 and carrying away heat, resulting in good heat dissipation effect.

[0089] In this embodiment, it can be as follows:Figure 21 As shown, the magnetic yoke 203 facing the windward side is provided with an extension 2032, while the magnetic yoke 203 on the leeward side is not provided with an extension 2032. Alternatively, the magnetic yoke 203 on the windward side and the magnetic yoke 203 on the leeward side may each be provided with an extension 2032.

[0090] This application also provides a power conversion device, which includes the reactor described above. The power conversion device can be an inverter, converter, or the like. The technical effects of this power conversion device are similar to those of the reactor described above, and will not be repeated here for brevity.

[0091] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0092] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0093] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A reactor, characterized in that, Includes a frame (10) and an electromagnetic assembly (20) mounted on the frame (10); The frame (10) includes a base (2) and two support parts (3) spaced apart from the base (2) along a first direction. The base (2) and the support parts (3) enclose an installation area (1). The base (2) is provided with a first ventilation hole (21), and the support parts (3) are provided with a second ventilation hole (31). The installation area (1) can be connected to the outside through the first ventilation hole (21) and the second ventilation hole (31) respectively. The electromagnetic component (20) includes a magnetic core (202) and a winding (201) wound around the magnetic core (202). The magnetic core (202) is supported at both ends of the two support portions (3) along the first direction, and the winding (201) is located in the mounting area (1).

2. The reactor according to claim 1, characterized in that, The support (3) has a second ventilation hole (31) on the side facing the base (2).

3. The reactor according to claim 2, characterized in that, The support part (3) has a first edge (33) on the side facing the base (2). The first edge (33) has a first notch (35). The support part (3) is connected to the base (2) and forms a second ventilation hole (31) at the first notch (35).

4. The reactor according to any one of claims 1-3, characterized in that, The frame (10) also includes a guide portion (5), which has a guide channel (51) communicating with the second ventilation hole (31). The guide portion (5) includes a first end (52) and a second end (53). The first end (52) is located on the side facing the mounting area (1), and the second end (53) is located on the side away from the mounting area (1). The guide channel (51) gradually narrows from the second end (53) to the first end (52).

5. The reactor according to claim 4, characterized in that, The guide part (5) includes two guide blocks (54) spaced apart along the second direction. At least one of the base (2) and the support part (3) is connected to or integrally formed with the guide block (54). The two guide blocks (54) are respectively provided with guide surfaces (55) on opposite side walls to form the guide channel (51). The first direction is perpendicular to the second direction.

6. The reactor according to any one of claims 1-3, characterized in that, The frame (10) also includes a partition (4) disposed on the base (2). The partition (4) is disposed on one side of the mounting area (1). When the frame (10) has at least two mounting areas (1), the partition (4) is disposed between two adjacent mounting areas (1). The ventilation holes include a third ventilation hole (41) provided on the partition (4).

7. The reactor according to claim 6, characterized in that, The partition (4) has a second notch (42) at one end facing the base (2). The partition (4) is connected to the base (2) and forms the third ventilation hole (41) at the second notch (42).

8. The reactor according to claim 6, characterized in that, The partition (4) is also provided with a separator (44) that extends into the mounting area (1) and is used to separate the winding (201) and form an inter-turn gap (2011).

9. The reactor according to claim 6, characterized in that, The partition (4) has a guide portion (45) on the side away from the base (2), and the guide portion (45) protrudes from the side surface of the partition (4) facing the mounting area (1).

10. The reactor according to claim 9, characterized in that, The guide portion (45) includes a third end (451) and a fourth end (452), the third end (451) facing the windward side and the fourth end (452) facing the leeward side, the third end (451) being located on the side of the fourth end (452) away from the base (2).

11. The reactor according to any one of claims 1-3, characterized in that, The electromagnetic component (20) further includes a magnetic yoke (203), one end of each magnetic core (202) along the first direction is connected by a set of magnetic yokes (203), and the other end of each magnetic core (202) along the first direction is connected by another set of magnetic yokes (203); The magnetic yoke (203) includes a magnetic yoke body (2031), which is formed by stacking multiple silicon steel sheets along the height direction. Some of the silicon steel sheets are provided with extensions (2032), which extend out of the magnetic yoke body (2031). The extensions (2032) located on the same side of the magnetic yoke (203) are spaced apart along the height direction, and a heat dissipation gap (2033) is formed between two adjacent extensions (2032).

12. A power conversion device, characterized in that, Including the reactor as described in any one of claims 1-11.

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