Vehicle-mounted small three-electric three-phase nanocrystalline common mode inductor

Abstract

The utility model discloses a vehicle-mounted small three-electric three-phase nanocrystalline common-mode inductor, which comprises a fixed base used for supporting a magnetic ring and a coil; the magnetic core is vertically erected at the two ends of the fixed base in the length direction of the fixed base, and a plurality of coils are arranged on the magnetic core at equal intervals; the coils are wound on one side, close to the fixed base, of the magnetic ring at equal intervals and are connected to the fixed base; wherein the magnetic ring is connected to the fixing base, and the end of the coil penetrates through the fixing base and is fixed to the side, away from the magnetic ring, of the fixing base. The magnetic cores are vertically erected at the two ends of the fixed base in the length direction of the fixed base, so that the area occupied by the integrated board is reduced, meanwhile, a plurality of sets of copper wires can be wound around the vertically-arranged runway magnetic cores, space is fully utilized for machine winding, and meanwhile a larger circuit can pass through.

Description

Technical Field

[0001] The utility model relates to the field of inductive filtering, and particularly relates to a three-phase nanocrystalline common-mode inductor for small three-electrics in vehicles. Background Art

[0002] A common-mode inductor, also called a common-mode inductance choke coil, is an important part in devices such as a switching power supply, and is commonly used in the switching power supply of a computer to filter common-mode electromagnetic interference signals. In the design of a circuit board, the common-mode inductor also plays a role in EMI filtering, and is used to suppress the electromagnetic wave radiated outward generated by a high-speed signal line; a three-phase common-mode inductor is composed of three inductance coils wound around a toroidal magnetic core.

[0003] At present, silicon carbide devices are usually used for three-phase common-mode inductors to achieve the purpose of higher frequency and higher integration, and at the same time, the size and cost of the inductance transformer are further reduced. After the material is formed, the inductance coil is generally wound manually.

[0004] However, since the previous magnetic core was toroidal and horizontal, the winding space was small, and it occupied a large area on the integrated board, resulting in poor integration effect. At the same time, the manual winding rate was slow and it could not be used for automated production. Summary of the Utility Model

[0005] Based on this, the purpose of the utility model is to provide a three-phase nanocrystalline common-mode inductor for small three-electrics in vehicles, aiming to solve the problems that the current magnetic core is toroidal and horizontal, the winding space is small, and it occupies a large area on the integrated board, resulting in poor integration effect. At the same time, the manual winding rate is slow and it cannot be used for automated production.

[0006] To achieve the above purpose, the utility model is realized through the following technical solutions: A three-phase nanocrystalline common-mode inductor for small three-electrics in vehicles, the three-phase nanocrystalline common-mode inductor for small three-electrics in vehicles includes:

[0007] A fixed base for supporting the magnetic ring and the coil;

[0008] A magnetic core vertically erected at both ends of the fixed base along the length direction of the fixed base, and the magnetic ring is provided with a plurality of coils;

[0009] Coils wound equidistantly on one side of the magnetic ring close to the fixed base and connected to the fixed base;

[0010] Wherein, the magnetic ring is connected to the fixed base, and the end of the coil penetrates through the fixed base and is fixed on the side of the fixed base away from the magnetic ring.

[0011] In summary, a three-phase nanocrystalline common-mode inductor for in-vehicle small three-electrics proposed according to the present utility model reduces the occupied area on the integrated board by vertically mounting the magnetic core at both ends of the fixed base along the length direction of the fixed base. At the same time, the vertically arranged racetrack magnetic core can wind multiple groups of copper wires, making full use of the space for machine winding and also allowing for a larger circuit. Specifically, the magnetic core is vertically mounted at both ends of the fixed base along the length direction of the fixed base, and a number of coils are equidistantly arranged on the magnetic core. This is to make full use of the space for a larger circuit and is suitable for the conditions of large in-vehicle current. The lead-out ends of the coils penetrate through the fixed base and are fixed on the side of the fixed base away from the magnetic ring to fix the coils.

[0012] According to one aspect of the above technical solution, the magnetic core is a racetrack-shaped magnetic core.

[0013] According to one aspect of the above technical solution, the fixed base includes a fixing plate and support frames symmetrically arranged at both ends of the fixing plate, and both ends of the magnetic core are mounted on the support frames.

[0014] According to one aspect of the above technical solution, a support inclined surface for fitting the magnetic core is provided at one end of the support frame away from the fixing plate.

[0015] According to one aspect of the above technical solution, two rows of limiting holes are provided on the fixing plate in parallel, and the two rows of limiting holes are arranged in a staggered manner.

[0016] According to one aspect of the above technical solution, the two rows of limiting holes are respectively arranged on both sides of the support frame.

[0017] According to one aspect of the above technical solution, an insulating thermoplastic tube is sleeved on a part of the lead-out end of the coil.

[0018] According to one aspect of the above technical solution, a tinned terminal is further provided at the end of the lead-out end of the coil passing through the fixing plate.

[0019] Additional aspects and advantages of the present utility model will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 is a schematic structural diagram of a three-phase nanocrystalline common-mode inductor for in-vehicle small three-electrics in an embodiment of the present utility model;

[0022] Figure 2 is an exploded schematic structural diagram of a three-phase nanocrystalline common-mode inductor for in-vehicle small three-electrics.

[0023] Description of the Symbols of the Components in the Drawings:

[0024] Fixed base 100, fixing plate 110, limiting hole 111, support frame 120, support inclined plane 121, magnetic core 200, coil 300, tinned terminal 310, insulating thermoplastic tube 400. Specific Embodiments

[0025] To make the objectives, features, and advantages of the present utility model more obvious and understandable, the following provides a detailed description of the specific embodiments of the present utility model with reference to the accompanying drawings. Several embodiments of the present utility model are shown in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present utility model more thorough and comprehensive.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right", "up", "down", and similar expressions used herein are only for the purpose of illustration and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model.

[0027] In the present utility model, unless otherwise clearly specified and defined, terms such as "installed", "connected", "connected to", "fixed", etc. 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0028] Please refer to Figure 1 - Figure 2 , which shows a structural schematic diagram of a vehicle-mounted small three-electricity three-phase nanocrystalline common-mode inductor provided in an embodiment of the present utility model. The vehicle-mounted small three-electricity three-phase nanocrystalline common-mode inductor includes a fixed base 100, a magnetic core 200 and a coil 300 provided on the fixed base 100, wherein:

[0029] To support the runway-shaped magnetic core 200 in this embodiment, the fixed base 100 includes a fixed plate 110 and a support frame 120 symmetrically arranged at both ends of the fixed plate 110. The purpose of setting the magnetic core 200 in this embodiment as a runway-shaped is to solve the problem that the current magnetic core 200 is annular and horizontal, the winding space is small, and the space occupied on the integrated board is large, resulting in poor integration effect. At the same time, the overall height of the inductor can be reduced, and the leakage inductance of the three-phase common mode inductor of this design is small. The runway-shaped magnetic core 200 is arranged on the integrated board through the fixed base 100, which reduces its occupied area while also providing a larger runway space for winding. Since the runway space is larger than the annular space and is more conducive to winding, the machine winding method can be used to replace the current manual winding method of the annular magnetic core 200, thereby improving the winding and production efficiency. The material of the magnetic core 200 is wound with nanocrystalline strips with lower loss, and the magnet is less affected by the environment through the protective box packaging. The protective box itself adopts a plastic structure and has good insulation and withstand voltage performance. Able to withstand higher voltages, no need for insulating coating protection on the magnet.

[0030] Specifically, the racetrack-shaped magnetic core 200 is mounted on the support frames 120 at both ends along the length direction of the fixed plate 110, and in order to better support the magnetic core 200, the support frame 120 is recessed in the direction toward the fixed plate 110 to form a support slope 121. The curvature of the support slope 121 is consistent with the curvature of the magnetic core 200, so when the magnetic core 200 is mounted on the support frame 120, its curved surface fits with the support slope 121, and it can also be fixed to the support frame 120 by dispensing glue or other bonding methods, thereby connecting the magnetic core 200 and the support frame 120 as a whole.

[0031] Furthermore, two rows of limiting holes 111 are arranged in parallel on the fixing plate 110, and the two rows of limiting holes 111 are arranged on both sides of the support frame 120, and the two rows of limiting holes 111 are arranged in a staggered manner. The limiting holes 111 are arranged on both sides of the support frame 120 to connect the lead-out ends of the coil 300 wound on the magnetic core 200. When the main body of the coil 300 is wound on one end of the magnetic core 200 close to the fixing plate 110, the lead-out ends at both ends of the coil 300 need to be fixed through the limiting holes 111. The purpose of the staggered arrangement of the two rows of limiting holes 111 is that since the two ends of the coil 300 wound on the magnetic core 200 are staggered and arranged relative to each other, the two rows of limiting holes 111 are staggered to be used in conjunction with the lead-out ends of the coil 300.

[0032] Due to the sufficient space of the racetrack-shaped magnetic core 200, three groups of round flat copper coils 300 can be wound in this embodiment, with a total of three groups of legs arranged side by side, and the coils 300 present a circular ring structure. The lead-out ends of each group of coils 300 pass through the fixed plate 110 through the limiting holes 111 to reach the side of the fixed plate 110 away from the magnetic core 200. Since the lead-out ends are partially tinned to enhance the solderability of the copper wire, a tinned terminal 310 is formed on the side of the fixed plate 110 away from the magnetic core 200 by tinning, and then the lead-out ends are fixed to the fixed plate 110.

[0033] It is worth noting that the exposed parts of the lead ends at both ends of the coil 300 are also covered with insulating thermoplastic tubes 400 to increase the insulation withstand voltage performance between the coils 300 and increase the tracking distance. In addition, the fixed base 100 can also be made of insulating epoxy resin.

[0034] In summary, according to the utility model, a vehicle-mounted small three-phase nanocrystalline common-mode inductor is proposed. By vertically setting the magnetic core at both ends of the fixed base along the length direction of the fixed base, the area occupied on the integrated board can be reduced. At the same time, the vertically set runway magnetic core can be wound with multiple groups of copper wires, making full use of the space for machine winding, and a larger circuit can be passed. Specifically, the magnetic core is vertically set at both ends of the fixed base along the length direction of the fixed base, and a number of coils are equidistantly arranged on the magnetic core. In order to make full use of the space to pass a larger circuit, it is suitable for vehicle-mounted large current conditions. The lead-out end of the coil passes through the fixed base and is fixed to the side of the fixed base away from the magnetic ring to fix the coil. The coil of the inductor of the utility model adopts a flat wire vertical winding method, which is more automated, and the three groups of coils can be arranged in parallel in a layered shape. Compared with the annular horizontal three-phase common-mode inductor, the space occupied on the integrated board is reduced, which can provide more space for optimizing circuit design. The above connection method makes it easy to assemble the coil and the fixing plate as well as the magnetic core and the support frame, thereby effectively improving the installation efficiency.

[0035] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all fall within the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. A vehicle-mounted small three-electricity three-phase nanocrystalline common-mode inductor, characterized in that The in-vehicle small three-electricity three-phase nanocrystalline common-mode inductor includes: A fixed base for supporting the magnetic ring and the coil; A magnetic core vertically erected at both ends of the fixed base along the length direction of the fixed base, and a plurality of coils are equidistantly arranged on the magnetic core; Coils are equidistantly wound on one side of the magnetic ring close to the fixed base and connected to the fixed base; Among them, the magnetic ring is connected to the fixed base, and the end of the coil penetrates through the fixed base and is fixed on the side of the fixed base away from the magnetic ring.

2. The on-vehicle small three-electricity three-phase nanocrystalline common-mode inductor according to claim 1, wherein The magnetic core is a racetrack-shaped magnetic core.

3. The on-vehicle small three-electricity three-phase nanocrystalline common-mode inductor according to claim 1, wherein The fixed base includes a fixing plate and support frames symmetrically arranged at both ends of the fixing plate, and both ends of the magnetic core are erected on the support frames.

4. The on-vehicle small three-electricity three-phase nanocrystalline common-mode inductor according to claim 3, characterized in that, One end of the support frame away from the fixing plate is provided with a support inclined surface for fitting the magnetic core.

5. The on-vehicle small three-electrics three-phase nanocrystalline common-mode inductor according to claim 4, wherein The fixing plate is provided with two rows of limiting holes arranged in parallel, and the two rows of limiting holes are arranged in a staggered manner.

6. The on-vehicle small three-electricity three-phase nanocrystalline common-mode inductor according to claim 5, wherein The two rows of limiting holes are respectively arranged on both sides of the support frame.

7. The on-vehicle small three-electricity three-phase nanocrystalline common-mode inductor according to claim 1, wherein An insulating thermoplastic tube is sleeved on a part of the coil lead-out end.

8. The on-vehicle small three-electricity three-phase nanocrystalline common-mode inductor according to claim 7, characterized in that A tinned terminal is also provided at the end of the coil lead-out end penetrating through the fixing plate.

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