Three-phase four-column magnetic integration inversion inductor

Abstract

The invention discloses a three-phase four-column magnetic integrated inversion inductor which comprises a bottom plate, a magnetic core structure and a coil assembly, the magnetic core structure is installed on the surface of one side of the bottom plate, and the coil assembly is wound around the magnetic core structure; the magnetic core structure comprises a plurality of magnet yokes and a plurality of magnetic columns, the plurality of magnet yokes are respectively parallel to a preset plane, and the plurality of magnet yokes are stacked and arranged along a preset direction; the adjacent magnet yokes are connected through a plurality of magnetic columns; the coil group comprises a plurality of inductance coils, and the plurality of inductance coils are wound on the plurality of magnetic columns in a one-to-one correspondence manner; the three-phase four-column magnetic integration inversion inductor further comprises a fastening assembly, and the fastening assembly is arranged on the bottom plate and connected with the magnetic core structure so as to achieve stable connection between the magnetic core structure and the bottom plate. The plurality of magnetic columns of the three-phase four-column magnetic integration inversion inductor realize magnetic integration through the corresponding magnetic yokes, and an integral magnetic core structure is obtained, so that the installation space occupied by the inductor in an inverter is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of inductors for inverters, and in particular to a three-phase four-column magnetic integrated inverter inductor. Background Art

[0002] Inverter Inductor refers to the inductor element used in the inverter circuit (such as solar inverter or electric vehicle inverter). The inverter is used to convert direct current (DC) into alternating current (AC), and the inductor plays an important role in the work of the inverter, especially in filtering and energy storage. Specifically, the inductor element in the inverter can store energy and release it when the current changes, helping to smooth the current fluctuations, reduce high-frequency noise, and improve the power quality of the inverter. At the same time, the inverter inductor can filter out high-frequency signals, reduce the electromagnetic interference (EMI) generated by the inverter, and ensure the stable operation of the equipment; the inverter inductor can balance the output current, reduce the fluctuations in the output waveform, and improve the working efficiency of the inverter. In addition, the inductor helps maintain the voltage stability of the inverter and prevents the voltage surge from affecting the load. In the prior art, the three-phase four-column magnetic integrated inverter inductor is an inductor structure specially used in the three-phase inverter circuit. Its core design idea is to combine the characteristics of the magnetic circuit of the inductor and the multi-phase current, and improve the efficiency and performance of the inverter through reasonable layout.

[0003] The three-phase four-column magnetic integrated inverter inductor mainly integrates the inductor magnetic circuit to make the three-phase current interact in the inductor, optimize the magnetic field distribution, and form a concentrated magnetic circuit in the magnetic core of the inductor, so that the current of each phase can flow through an independent magnetic flux path, and the magnetic flux can offset each other on the common arm. However, the existing three-phase four-column magnetic integrated inverter inductor has insufficient magnetic circuit integration, resulting in compression space for the inductor volume, and the insufficient installation stability of the magnetic core structure is easy to affect the stability of the inductor installation application. Summary of the invention

[0004] Based on this, it is necessary to provide a three-phase four-column magnetic integrated inverter inductor to address the technical problems of insufficient integration and support of existing three-phase four-column magnetic integrated inverter inductors.

[0005] A three-phase four-column magnetic integrated inverter inductor comprises a base plate, a magnetic core structure and a coil group. The magnetic core structure is mounted on a side surface of the base plate, and the coil group is wound around the magnetic core structure, thereby forming a three-phase four-column magnetic integrated inverter inductor.

[0006] The magnetic core structure includes a plurality of magnetic yokes and a plurality of magnetic columns. The plurality of magnetic yokes are respectively arranged parallel to a preset plane, and the plurality of magnetic yokes are arranged in a stacked manner along a preset direction. Adjacent magnetic yokes are connected by a plurality of magnetic columns. Correspondingly, the coil group includes a plurality of inductance coils, and the plurality of inductance coils are respectively wound around the plurality of magnetic columns in a one-to-one correspondence, so that the plurality of magnetic columns are magnetically integrated through the corresponding magnetic yokes, and an integral magnetic core structure is obtained.

[0007] The three-phase four-column magnetic integrated inverter inductor also includes a fastening component, which is arranged on the base plate and connected to the magnetic core structure to achieve a stable connection between the magnetic core structure and the base plate.

[0008] The fastening assembly includes a plurality of support blocks and a plurality of fastening bands. The plurality of support blocks are respectively arranged on the surface of the base plate corresponding to the plurality of yokes. When the magnetic core structure is installed on the base plate, a side surface of each yoke abuts against the corresponding support block surface, so that the magnetic core structure can be stably connected to the base; the plurality of fastening bands respectively correspond to the plurality of yokes one by one, and each fastening band passes through the side surface of the corresponding yoke and is connected to the base plate to fasten the corresponding yoke to the support block surface.

[0009] In one embodiment, based on the preset planes of the plurality of magnetic yokes being relatively parallel, the plurality of magnetic yokes are sequentially stacked and arranged along a straight line direction perpendicular to the preset planes, thereby forming a magnetic core structure extending in a straight line.

[0010] In one of the embodiments, the adjacent magnetic yokes are connected via a plurality of magnetic columns arranged parallel to each other to form a closed magnetic circuit structure.

[0011] In one of the embodiments, the adjacent magnetic yokes are connected via two magnetic columns arranged parallel to each other. Correspondingly, between the adjacent magnetic yokes, two inductance coils are respectively wound on the side surfaces of the two magnetic columns.

[0012] In one embodiment, each of the magnetic columns is composed of a plurality of independent magnetic blocks stacked along the axial direction.

[0013] In one embodiment, each of the magnetic columns is composed of two independent magnetic blocks stacked along the axial direction.

[0014] In one embodiment, the opposite side surfaces of the two magnetic blocks are respectively connected to the corresponding two yoke surfaces, and the opposite side surfaces of the two magnetic blocks are cooperatively connected to form a complete magnetic circuit.

[0015] In one embodiment, each of the magnetic blocks is configured as a columnar block structure with a preset length according to actual application requirements.

[0016] In one embodiment, the cross section of each magnetic block can be configured to be an axisymmetric shape, such as a circle, a square or a regular polygon.

[0017] In one embodiment, the cross section of each magnetic block can be configured to be a non-axisymmetric shape, such as an ellipse, a parallelogram, or an irregular polygon.

[0018] In one embodiment, the magnetic core structure further includes a plurality of partitions, and each two partitions are respectively disposed on the two end surfaces of a magnetic block, that is, a corresponding partition is separated between the two end surfaces of each magnetic block and the adjacent magnetic block and magnetic yoke.

[0019] In one embodiment, the edge of each of the partitions corresponding to the end surface of the magnetic block is configured as a plate-like structure with a corresponding shape and a through center.

[0020] In one embodiment, an insulating plate is disposed between each of the magnetic yokes and the corresponding inductor coil, and each insulating plate is disposed between the corresponding end surface of the inductor coil and the surface of the magnetic yoke.

[0021] In one embodiment, the end surface of each insulating plate corresponding to the inductor coil is configured as a plate-like structure with a corresponding shape and a through center.

[0022] In one embodiment, the two inductance coils between two adjacent magnetic yokes are electrically connected in parallel.

[0023] In one embodiment, the parallel lead-out ends of the two inductor coils between two adjacent magnetic yokes extend to the other side of the bottom plate through corresponding connecting portions.

[0024] The several magnetic columns of the above-mentioned three-phase four-column magnetic integrated inverter inductor are magnetically integrated through corresponding magnetic yokes to obtain an overall magnetic core structure, which greatly reduces the installation space occupied by the inductor in the inverter and effectively optimizes the heat dissipation efficiency of the inverter inductor. The three-phase four-column structure generates magnetic coupling between the three-phase currents, balances the three-phase magnetic flux, reduces magnetic saturation, improves magnetic circuit utilization and inductance stability, and through magnetic integration of the inverter inductor, the power density can be effectively improved to meet the miniaturization and lightweight requirements of the inverter. Based on this, a number of support blocks are respectively corresponding to a number of yokes and are arranged on the surface of the base plate. When the magnetic core structure is installed on the base plate, one side surface of each yoke abuts against the corresponding support block surface, so that the magnetic core structure can be stably connected to the base; a number of fastening belts correspond to a number of yokes one by one, and each fastening belt is wrapped around the side surface of the corresponding yoke and connected to the base plate to fasten the corresponding yoke to the support block surface, thereby realizing a fastening connection between the magnetic core structure and the base plate, ensuring the overall structural stability of the three-phase four-column magnetic integrated inverter inductor, and ensuring the mechanical strength and vibration stability of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1A schematic diagram of the structure of a three-phase four-column magnetic integrated inverter inductor in one embodiment; Figure 2 A schematic diagram of a partial structure of a three-phase four-column magnetic integrated inverter inductor in one embodiment; Figure 3 A schematic diagram of a partial structure of a three-phase four-column magnetic integrated inverter inductor in one embodiment; Figure 4 A schematic diagram of a partial structure of a three-phase four-column magnetic integrated inverter inductor in one embodiment; Figure 5 FIG. 1 is a schematic diagram of a partial structure of a three-phase four-column magnetic integrated inverter inductor in an embodiment. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0032] See also Figures 1 to 5The present invention discloses a three-phase four-pillar magnetic integrated inverter inductor 10, which includes a base plate 100, a magnetic core structure 200 and a coil group 300. The magnetic core structure 200 is installed on a side surface of the base plate 100, and the coil group 300 is wound on the magnetic core structure 200, thereby forming a three-phase four-pillar magnetic integrated inverter inductor 10. Among them, the magnetic core structure 200 includes a plurality of magnetic yokes 210 and a plurality of magnetic columns 220, and the plurality of magnetic yokes 210 are respectively arranged in parallel with a preset plane, and the plurality of magnetic yokes 210 are arranged in a stacked manner along a preset direction; adjacent magnetic yokes 210 are connected by a plurality of magnetic columns 220; correspondingly, the coil group 300 includes a plurality of inductor coils 310, and the plurality of inductor coils 310 are respectively wound on the plurality of magnetic columns 220 in a one-to-one correspondence, so that the plurality of magnetic columns 220 are respectively magnetically integrated through the corresponding magnetic yokes 210, and an integral magnetic core structure 200 is obtained, thereby greatly reducing the installation space occupied by the inductor in the inverter, and effectively optimizing the heat dissipation efficiency of the inverter inductor. The three-phase four-column structure generates magnetic coupling between the three-phase currents, can balance the three-phase magnetic flux, reduce magnetic saturation, improve the magnetic circuit utilization rate and inductance stability, and through the magnetic integration of the inverter inductor, the power density can be effectively improved to meet the miniaturization and lightweight requirements of the inverter. Based on this, the three-phase four-column magnetic integrated inverter inductor 10 further includes a fastening component 400 , which is disposed on the base plate 100 and connected to the magnetic core structure 200 to achieve a stable connection between the magnetic core structure 200 and the base plate 100 . Specifically, the fastening assembly 400 includes a plurality of support blocks 410 and a plurality of fastening belts 420. The plurality of support blocks 410 correspond to a plurality of yokes 210 respectively and are arranged on the surface of the base plate 100. When the magnetic core structure 200 is installed on the base plate 100, a side surface of each yoke 210 abuts against the surface of the corresponding support block 410, so that the magnetic core structure 200 can be stably connected to the base; the plurality of fastening belts 420 correspond to the plurality of yokes 210 respectively, and each fastening belt 420 is wound around the side surface of the corresponding yoke 210 and connected to the base plate 100 to fasten the corresponding yoke 210 to the surface of the support block 410, thereby realizing a fastening connection between the magnetic core structure 200 and the base plate 100, ensuring the overall structural stability of the three-phase four-column magnetic integrated inverter inductor 10, and ensuring the mechanical strength and vibration stability of the overall structure.

[0033] Furthermore, based on a preset plane in which a plurality of yokes 210 are relatively parallel, a plurality of yokes 210 are stacked and arranged in sequence along a straight line direction perpendicular to the preset plane, thereby forming a magnetic core structure 200 extending in a straight line, thereby ensuring an effective magnetic integration setting of the three-phase four-column magnetic integrated inverter inductor 10, while improving the regularity of the magnetic core structure 200, which is beneficial to practical application installation.

[0034] Furthermore, adjacent magnetic yokes 210 are connected by a plurality of magnetic columns 220 arranged in parallel to each other to form a closed magnetic circuit structure. In one embodiment, adjacent magnetic yokes 210 are connected by two magnetic columns 220 arranged in parallel to each other, and correspondingly, between adjacent magnetic yokes 210, two inductance coils 310 are respectively wound on the side surfaces of the two magnetic columns 220.

[0035] Furthermore, each magnetic column 220 is composed of a plurality of independent magnetic blocks 221 stacked in the axial direction. Specifically, in one embodiment, each magnetic column 220 is composed of two independent magnetic blocks 221 stacked in the axial direction. More specifically, the opposite side surfaces of the two magnetic blocks 221 are respectively connected to the corresponding surfaces of the two magnetic yokes 210, and the facing side surfaces of the two magnetic blocks 221 are matched and connected to form a complete magnetic circuit. In some embodiments, each magnetic block 221 is set as a columnar block structure of a preset length according to actual application requirements; in this embodiment, the cross-sectional shape of each magnetic block 221 is not limited; in some embodiments, the cross-sectional shape of each magnetic block 221 can be set to an axisymmetric shape, such as a circle, a square or a regular polygon; in other embodiments, the cross-sectional shape of each magnetic block 221 can be set to a non-axisymmetric shape, such as an ellipse, a parallelogram, or an irregular polygon.

[0036] Furthermore, the magnetic core structure 200 further includes a plurality of partitions 230, and each two partitions 230 are respectively disposed on the two end surfaces of a magnetic block 221, that is, a corresponding partition 230 is spaced between the two end surfaces of each magnetic block 221 and the adjacent magnetic block 221 and the magnetic yoke 210. Specifically, the edge of each partition 230 corresponding to the end surface of the magnetic block 221 is configured as a plate-like structure having a corresponding shape and a central through-hole, so as to form an air gap between the two ends of the magnetic block 221 and the adjacent magnetic block 221 or the magnetic yoke 210.

[0037] Furthermore, an insulating plate 240 is disposed between each yoke 210 and the corresponding inductor 310, and each insulating plate 240 is disposed between the end face of the corresponding inductor 310 and the surface of the yoke 210, so as to ensure the insulation performance of both ends of each inductor 310. Specifically, the end face of each insulating plate 240 corresponding to the inductor 310 is configured as a plate-like structure with a corresponding shape and a through center.

[0038] In one embodiment, the two inductance coils 310 between two adjacent magnetic yokes 210 are electrically connected in parallel. Specifically, the parallel lead-out ends of the two inductance coils 310 between two adjacent magnetic yokes 210 extend to the other side of the bottom plate 100 through the corresponding connection portion 320, which is convenient for actual installation and application.

[0039] In summary, the three-phase four-column magnetically integrated inverter inductor disclosed in the present invention realizes magnetic integration of several magnetic columns through corresponding magnetic yokes respectively, and obtains an overall magnetic core structure, thereby greatly reducing the installation space occupied by the inductor in the inverter, and effectively optimizing the heat dissipation efficiency of the inverter inductor. The three-phase four-column structure generates magnetic coupling between the three-phase currents, which can balance the three-phase magnetic flux, reduce magnetic saturation, improve magnetic circuit utilization and inductance stability, and through magnetic integration of the inverter inductor, the power density can be effectively improved to meet the miniaturization and lightweight requirements of the inverter. Based on this, a number of support blocks are respectively corresponding to a number of yokes and are arranged on the surface of the base plate. When the magnetic core structure is installed on the base plate, one side surface of each yoke abuts against the corresponding support block surface, so that the magnetic core structure can be stably connected to the base; a number of fastening belts correspond to a number of yokes one by one, and each fastening belt is wrapped around the side surface of the corresponding yoke and connected to the base plate to fasten the corresponding yoke to the support block surface, thereby realizing a fastening connection between the magnetic core structure and the base plate, ensuring the overall structural stability of the three-phase four-column magnetic integrated inverter inductor, and ensuring the mechanical strength and vibration stability of the overall structure.

[0040] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A three-phase four-column magnetic integrated inverter inductor, characterized in that: include: A bottom plate, a magnetic core structure and a coil group, wherein the magnetic core structure is mounted on a side surface of the bottom plate, and the coil group is wound around the magnetic core structure, thereby forming the three-phase four-column magnetic integrated inverter inductor; The magnetic core structure includes a plurality of magnetic yokes and a plurality of magnetic columns, wherein the plurality of magnetic yokes are respectively arranged parallel to a preset plane, and the plurality of magnetic yokes are arranged in a stacked manner along a preset direction; adjacent magnetic yokes are connected by the plurality of magnetic columns; correspondingly, the coil group includes a plurality of inductance coils, and the plurality of inductance coils are respectively wound on the plurality of magnetic columns in a one-to-one correspondence, so that the plurality of magnetic columns are magnetically integrated through the corresponding magnetic yokes, and an integral magnetic core structure is obtained; The three-phase four-column magnetic integrated inverter inductor further includes a fastening component, which is arranged on the bottom plate and connected to the magnetic core structure to achieve a stable connection between the magnetic core structure and the bottom plate; The fastening assembly includes a plurality of support blocks and a plurality of fastening belts, wherein the plurality of support blocks are respectively arranged on the surface of the base plate corresponding to the plurality of magnetic yokes, and when the magnetic core structure is mounted to the base plate, a side surface of each magnetic yoke abuts against the corresponding support block surface, so that the magnetic core structure can be stably connected to the base; the plurality of fastening belts respectively correspond to the plurality of magnetic yokes one by one, and each fastening belt passes through the side surface of the corresponding magnetic yoke and is connected to the base plate to fasten the corresponding magnetic yoke to the support block surface.

2. The three-phase four-column magnetic integrated inverter inductor according to claim 1, characterized in that: Based on the relatively parallel preset planes of the plurality of magnetic yokes, the plurality of magnetic yokes are sequentially stacked and arranged along a straight line direction perpendicular to the preset plane, thereby forming a magnetic core structure extending in a straight line.

3. The three-phase four-column magnetic integrated inverter inductor according to claim 1, characterized in that: The adjacent magnetic yokes are connected by a plurality of magnetic columns arranged parallel to each other to form a closed magnetic circuit structure.

4. The three-phase four-column magnetic integrated inverter inductor according to claim 1, characterized in that: The adjacent magnetic yokes are connected via two magnetic columns arranged in parallel with each other. Correspondingly, between the adjacent magnetic yokes, the two inductance coils are respectively wound on the side surfaces of the two magnetic columns.

5. The three-phase four-column magnetic integrated inverter inductor according to claim 3 or 4, characterized in that: Each of the magnetic columns is composed of a plurality of independent magnetic blocks stacked along the axial direction.

6. The three-phase four-column magnetic integrated inverter inductor according to claim 5, characterized in that: The magnetic core structure further comprises a plurality of partitions, and every two of the partitions are respectively and correspondingly arranged on the two end surfaces of one of the magnetic blocks.

7. The three-phase four-column magnetic integrated inverter inductor according to claim 6, characterized in that: The edge of each partition corresponding to the end surface of the magnetic block is configured as a plate-like structure with a corresponding shape and a through center.

8. The three-phase four-column magnetic integrated inverter inductor according to claim 1, characterized in that: An insulating plate is arranged between each of the magnetic yokes and the corresponding inductor coil, and each of the insulating plates is arranged between the corresponding end surface of the inductor coil and the surface of the magnetic yoke.

9. The three-phase four-column magnetic integrated inverter inductor according to claim 8, characterized in that: Each of the insulating plates is configured as a plate-like structure with a corresponding shape and a central through-hole at the end surface corresponding to the inductor coil.

10. The three-phase four-column magnetic integrated inverter inductor according to claim 4, characterized in that: The two inductance coils between two adjacent magnetic yokes are electrically connected in parallel.

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