Inverter inductor
By adopting a separated magnetic core structure and optimized heat dissipation design, the inverter inductor meets the requirements of high saturation flux density and low loss at the same time, solving the problem of poor heat dissipation of traditional inverter inductors and achieving efficient heat dissipation.
Patent Information
- Application Number
- CN202422685955.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-05
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-11-05
AI Technical Summary
Traditional inverter inductors cannot meet the requirements of high saturation flux density and low loss at the same time, and the heat dissipation effect is poor.
The split core structure consists of an upper and lower yoke core made of atomized sendust material, and a middle column core made of iron silicon material, combined with the heat dissipation design of the internal and external shells, including air duct openings and heat dissipation spacers, and side and bottom heat dissipation teeth to optimize heat dissipation.
It achieves high anti-saturation capability and low-loss inductor performance, while improving the heat dissipation effect of the inverter inductor.
Smart Images
Figure CN223450648U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of inductance, specifically, an inverter inductance. BACKGROUND
[0002] With the development of the photovoltaic industry, the demand for high power density of inverter inductance gradually becomes a trend, and the requirements for the anti-saturation capability and loss of the magnetic core are also increasingly high. The traditional inductor magnetic core is usually integrally constructed as a columnar magnetic core or a ring-shaped magnetic core, and it is often difficult to simultaneously meet the characteristics of high saturation magnetic flux density and low loss. The current technical means generally improve the material quality of the magnetic core to meet the requirements, for example, the magnetic core of iron-silicon material can meet the loss requirement, but cannot meet the requirement of high saturation magnetic flux density, or the magnetic core of gas atomization material can meet the requirement of high saturation magnetic flux density, but has high loss. In addition, the overall magnetic core often needs to be opened to adjust the overall magnetic flux inductance of the magnetic core, which further increases the labor cost and material cost of the magnetic core manufacturing.
[0003] In addition, the temperature inside the inverter inductance will rise due to heat dissipation during the working process of the inverter inductance, and the inverter inductance often needs to be sealed using potting glue, and the inverter inductance after potting often faces the problem of heat dissipation. In order to solve this problem, the traditional inverter inductance usually reduces the temperature through the design of the heat dissipation structure of the shell, but the existing heat dissipation structure has the problem of poor heat dissipation effect. SUMMARY
[0004] In order to solve the above technical problems, the utility model provides an improved inverter inductance which has the effects of high anti-saturation capability, low loss and high heat dissipation.
[0005] The inverter inductance of the utility model includes an external shell, an internal shell and an inductance assembly, the inductance assembly is accommodated in the accommodation cavity of the internal shell, and the whole of the internal shell and the inductance assembly is accommodated in the accommodation cavity of the external shell, wherein the inductance assembly is provided with three separated magnetic cores in the cavity of each coil, the three separated magnetic cores are composed of an upper yoke magnetic core and a lower yoke magnetic core of gas atomized iron-silicon-aluminum material, and a middle column magnetic core of iron-silicon material; the accommodation cavity of the internal shell includes a first inductance accommodation cavity and a second inductance accommodation cavity, wherein the interval distance between the first inductance accommodation cavity and the second inductance accommodation cavity gradually decreases from the bottom of the accommodation cavity upwards, and finally the two are joined together in the middle of the accommodation cavity of the internal shell to form a joint, and wherein the interval part from the bottom to the joint between the first inductance accommodation cavity and the second inductance accommodation cavity forms an air duct opening between the adjacent inductances of the inductance assembly; the external shell is provided with a heat dissipation spacer in the middle of the accommodation cavity, and the heat dissipation spacer and the air duct opening are matched together in a non-tight fitting manner.
[0006] In some embodiments, the outer housing is provided with a plurality of parallel side heat dissipation fins on both sides, and a plurality of parallel bottom heat dissipation fins on the bottom.
[0007] In some embodiments, the outer housing comprises one or more accommodating cavities for accommodating the inner housing, wherein adjacent accommodating cavities are joined together by a connecting portion, and the rectangular top of the connecting portion allows adjacent accommodating cavities to be spaced apart by a certain distance.
[0008] In some embodiments, the inductor assembly comprises an insulating partition plate on both sides of the coil and an insulating cover plate, wherein the insulating partition plate is arranged between the coil and the insulating cover plate.
[0009] In some embodiments, the insulating partition plate is provided with a hole, which allows the upper yoke magnetic core and the lower yoke magnetic core of the magnetic core to axially pass through the insulating partition plate and abut against the insulating cover plate.
[0010] In some embodiments, the insulating partition plate is provided with a plurality of fixing claws protruding from the outer side surface thereof, and a flange surrounding three side edges of the insulating partition plate.
[0011] The beneficial effects of the utility model lie in:
[0012] The inverter inductor of the utility model is provided with three separated magnetic cores in the cavity of each coil of the inductor assembly, wherein the three separated magnetic cores are composed of an upper yoke magnetic core and a lower yoke magnetic core made of aerosolized iron silicon aluminum material, and a middle column magnetic core made of iron silicon material.
[0013] Further, the inverter inductor of the utility model has the advantages that the internal shell and the external shell are combined to design the heat dissipation structure, the heat dissipation effect of the inverter inductor is optimized and improved, and the heat dissipation area of the heat dissipation teeth is increased.
[0014] Further, the inverter inductor of the utility model has the advantages that the internal shell and the external shell are combined to design the heat dissipation structure, the heat dissipation effect of the inverter inductor is optimized and improved, and the heat dissipation area of the heat dissipation teeth is increased. BRIEF DESCRIPTION OF DRAWINGS
[0015] The features and advantages of the utility model will be better shown by combining the following drawings and embodiments.
[0016] Figure 1 An exploded view of the inverter inductor in the embodiment of the utility model is shown.
[0017] Figure 2 A structure schematic view of the insulation partition plate of the inverter inductor in the embodiment of the utility model is shown.
[0018] Figure 3 A structure schematic view of the external shell of the inverter inductor in the embodiment of the utility model is shown.
[0019] Figure 4 A sectional view of the external shell of the inverter inductor is shown. Figure 3
[0020] Figure 5 A structure schematic view of the bottom of the internal shell of the inverter inductor in the embodiment of the utility model is shown.
[0021] Figure 6 A sectional view of the internal shell of the inverter inductor is shown. Figure 5 DETAILED DESCRIPTION
[0022] The utility model will be explained further in detail now in combination with the drawings and embodiments, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and are not for limiting the scope of the utility model.
[0023] As shown in the drawings, Figure 1 The utility model provides an inverter inductance, this inverter inductance includes external shell 10, internal shell 20 and inductance component 30, wherein one or more inductance components 30 can be placed in the containing cavity of internal shell 20, and the shape structure of external shell 10 and internal shell 20 is mutually matched, so that the inductance component 30 and internal shell 20 of the integral of assembled completion can be tightly placed in the containing cavity 11 of external shell 10. Inductance component 30 includes at least one coil 31, the terminal 32 for connecting inductance component 30 with external circuit, multiple separate magnetic cores 33, the insulating baffle 35 of both sides of coil 31 and insulating cover plate 36. In preferred embodiments, three separate magnetic cores 33 are arranged in the cavity surrounded by each coil 31, wherein the three separate magnetic cores 33 are linearly arranged adjacent to each other, and the three separate magnetic cores 33 are composed of upper yoke magnetic core and lower yoke magnetic core of aerosolized iron silicon aluminum material and middle column magnetic core of iron silicon material. Compared with the inductor with only one integral magnetic core, the inductor with the aerosolized iron silicon aluminum magnetic core divided into upper and lower yokes and the middle iron silicon alloy magnetic core can better guide and concentrate the magnetic field lines to improve the inductive voltage and energy storage capacity of the inductor; can more effectively control the magnetic field distribution, reduce the leakage phenomenon of magnetic flux, thereby improve the utilization rate of the magnetic core and reduce the energy loss; and the middle iron silicon alloy magnetic core as a connecting and supporting part can provide continuity of the magnetic circuit and increase the transmission efficiency of the magnetic field. Therefore, the utility model meets the inductance performance requirements of high saturation resistance and low loss by the three separate magnetic cores composed of upper yoke magnetic core and lower yoke magnetic core of aerosolized iron silicon aluminum material and middle column magnetic core of iron silicon material.
[0024] In further embodiments, the peripheral size of the insulating baffle 35 and the insulating cover plate 36 on both sides of the coil 31 is greater than the diameter size of the coil 31, so as to facilitate the separation of the coil 31 and the internal shell 20. Moreover, the insulating baffle 35 is arranged between the coil 31 and the insulating cover plate 36 to separate the insulating cover plate 36 and the coil 31. In combination with Figure 2The structure of the insulation partition plate 35 is shown, which is provided with a hole 351 that can make the upper yoke and lower yoke of the magnetic core 33 axially pass through the insulation partition plate 35 and abut against the insulation cover plate 36, so as to fix and position the magnetic core 33 through the hole 351. The insulation partition plate 35 is also provided with a plurality of fixing claws 352 protruding from the outer surface thereof, and a flange 353 surrounding three sides of the insulation partition plate 35, wherein the fixing claws 352 and the flange 353 are integrally formed to jointly constitute the fixing part of the insulation cover plate 36, so as to ensure that the magnetic core 33 is stably abutted against the insulation cover plate 36.
[0025] In a preferred embodiment, an insulation gasket 34 can also be arranged between the insulation cover plate 36 and the upper yoke or lower yoke of the magnetic core 33, which can be composed of high-temperature and high-pressure resistant epoxy resin. Through the insulation gasket 34, the displacement impact between the insulation cover plate 36 and the magnetic core 33 can be buffered, and further the insulation of the magnetic core 33 from the external environment is ensured.
[0026] As shown in Figure 3 and Figure 4 The external shell 10 can include one or more accommodation cavities 11 for accommodating the internal shell 20, wherein two adjacent accommodation cavities 11 are joined together through a connecting part 15. The two sides of the connecting part 15 are formed by the edge profiles of the side portions of the two adjacent accommodation cavities 11, and the top of the connecting part 15 is a flat rectangular plane with a certain width, wherein the rectangular top of the connecting part 15 makes the adjacent accommodation cavities 11 spaced apart by a certain distance, so that the two adjacent inductor assemblies 30 placed in the adjacent accommodation cavities 11 are also spaced apart by a certain distance. In this way, through the spacing of the connecting part 15, the problem of heat being difficult to dissipate caused by the adjacent inductor assemblies 30 being close together is avoided.
[0027] In an embodiment, the external shell 10 is provided with a plurality of parallel side heat dissipation fins 12 on both sides, and a plurality of parallel bottom heat dissipation fins 13 on the bottom. The bottom heat dissipation fins 13 extend downward from the bottom base plate of the external shell 10 to a sufficient height, wherein the fin height of the bottom heat dissipation fins 13 can reach at least 120 mm. The design of the side heat dissipation fins 12 and the bottom heat dissipation fins 13 can effectively increase the heat dissipation area of the inverter inductor shell and improve the heat dissipation effect.
[0028] In one embodiment, the middle of the accommodating cavity 11 of the outer shell 10 is provided with a heat dissipation spacer 14, which is protruded upward from the middle of the bottom plate of the accommodating cavity 11 and is inserted into the gap in the middle of the accommodating cavity of the two adjacent coils 31 of the inductor assembly 30 of the inner shell 20. The heat dissipation spacer 14 can facilitate the heat between the adjacent coils 31 of the inductor assembly 30 to be guided to the outer shell 10 and dissipated through the side heat dissipation teeth 12 and the bottom heat dissipation teeth 13 on the outer shell 10.
[0029] In one embodiment, the outer shell 10 is further provided with a mounting hole 16 at the middle heat dissipation tooth of the bottom heat dissipation teeth 13 of the accommodating cavity 11 at the symmetrical two ends, which is extended upward from the bottom of the middle heat dissipation tooth of the bottom heat dissipation teeth 13, but the mounting hole 16 is formed as a blind hole without penetrating the middle heat dissipation tooth. The mounting hole 16 is used to mount and fix the outer shell 10 of the inverter inductor with the external electrical equipment.
[0030] As shown in Figure 5 and Figure 6 , the inner shell 20 can include a plurality of accommodating cavities for accommodating the inductor assembly 30, wherein the plurality of accommodating cavities are spaced apart by a certain distance and connected together through the inner shell connecting part 21. Each accommodating cavity includes a first inductor accommodating cavity 22 and a second inductor accommodating cavity 23. The first inductor accommodating cavity 22 and the second inductor accommodating cavity 23 can have a cylindrical shape suitable for accommodating the inductor. Further, referring to Figure 6 , the spacing distance between the first inductor accommodating cavity 22 and the second inductor accommodating cavity 23 gradually decreases from the bottom and finally merges together at the middle of the accommodating cavity of the inner shell 20 to form a joint 24. And the spacing part from the bottom to the joint 24 between the first inductor accommodating cavity 22 and the second inductor accommodating cavity 23 forms an air channel opening between the adjacent inductors of the inductor assembly 30, wherein the heat dissipation spacer 14 of the outer shell 10 can be inserted into the air channel opening to be fitted together in a non-tight fitting manner. Through the air channel opening, the hot air between the adjacent inductors can flow freely in the air channel opening, and after the hot air contacts the heat dissipation spacer 14, the heat of the inductor can be smoothly discharged from the shell.
[0031] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. An inverter inductor, comprising an outer shell (10), an inner shell (20) and an inductor assembly (30), wherein the inductor assembly (30) is accommodated in a receiving cavity of the inner shell (20), and the inner shell (20) and the inductor assembly (30) are integrally accommodated in a receiving cavity (11) of the outer shell (10), characterized in that: The inductor assembly (30) is provided with three separate magnetic cores (33) in the cavity of each coil (31), and the three separate magnetic cores (33) are composed of an upper yoke magnetic core and a lower yoke magnetic core made of atomized sendust material, and a middle column magnetic core made of iron silicon material; The accommodating cavity of the internal shell (20) comprises a first inductor accommodating cavity (22) and a second inductor accommodating cavity (23), wherein the spacing between the first inductor accommodating cavity (22) and the second inductor accommodating cavity (23) gradually decreases from the bottom of the accommodating cavity upwards, and finally joins together in the middle of the accommodating cavity of the internal shell (20) to form a joint (24), and wherein the spacing between the first inductor accommodating cavity (22) and the second inductor accommodating cavity (23) from the bottom to the joint (24) forms an air duct opening between adjacent inductors of the inductor assembly (30); The outer shell (10) is provided with a heat dissipation spacer (14) in the middle of the accommodating cavity (11); the heat dissipation spacer (14) is matched with the air duct opening in a non-tightly matched manner.
2. The inverter inductor according to claim 1, characterized in that: The outer shell (10) is provided with a plurality of parallel side heat dissipation teeth (12) on both sides, and a plurality of parallel bottom heat dissipation teeth (13) on the bottom.
3. The inverter inductor according to claim 2, characterized in that: The bottom heat dissipation teeth (13) extend downward from the bottom base plate of the external housing (10) to a tooth height of at least 120 mm.
4. The inverter inductor according to claim 2 or 3, characterized in that: The outer shell (10) includes one or more accommodating cavities (11) for accommodating the inner shell (20), wherein adjacent accommodating cavities (11) are connected together by a connecting portion (15), and the rectangular top of the connecting portion (15) makes the adjacent accommodating cavities (11) spaced apart by a certain distance.
5. The inverter inductor according to claim 2 or 3, characterized in that: The outer shell (10) is provided with mounting holes (16) at the middle heat dissipation teeth of the bottom heat dissipation teeth (13) of the accommodating cavity (11) at both symmetrical ends.
6. The inverter inductor according to claim 1, characterized in that: The inductor assembly (30) comprises an insulating partition (35) and an insulating cover (36) on both sides of the coil (31), wherein the insulating partition (35) is arranged between the coil (31) and the insulating cover (36).
7. The inverter inductor according to claim 6, characterized in that: The outer dimensions of the insulating partition (35) and the insulating cover (36) on both sides of the coil (31) are larger than the diameter of the coil (31).
8. The inverter inductor according to claim 6 or 7, characterized in that: The insulating partition (35) is provided with a hole (351), and the hole (351) allows the upper yoke magnetic core and the lower yoke magnetic core of the magnetic core (33) to axially pass through the insulating partition (35) and abut against the insulating cover plate (36).
9. The inverter inductor according to claim 6 or 7, characterized in that: The insulating partition (35) is provided with a plurality of fixing claws (352) protruding from the outer surface thereof, and flanges (353) surrounding three side edges of the insulating partition (35).
10. The inverter inductor according to claim 6, characterized in that: An insulating gasket (34) is provided between the insulating cover plate (36) and the magnetic core (33).