CN221668638U - Inductor, filter and electric vehicle - Google Patents

Abstract

The present application relates to an inductor, a filter, and an electric vehicle. The inductor is provided with an inductance core and a coil, wherein the coil is wound on the inductance core and comprises a metal wire, the metal wire generates a magnetic field when electrified, the outer side of the metal wire is coated with a magnetic conduction material layer for concentrating magnetic lines of force of the magnetic field, and the outer side of the magnetic conduction material layer is coated with an insulating layer. The inductor can prevent excessive leakage of magnetic force lines into air by adopting the design of the magnetic conduction material layer, thereby improving the density of the magnetic field.

Description

Inductor, filter and electric vehicle

Technical Field

The application relates to the technical field of electronic devices, in particular to an inductor, a filter provided with the inductor and an electric vehicle provided with the filter.

Background

The information provided in this section is for the purpose of generally presenting the context of the disclosure. Work of the presently named inventors, to the extent it is described in this section, as well as aspects of the description that may not otherwise qualify as prior art at the time of filing, are neither expressly nor impliedly admitted as prior art against the present disclosure.

In industrial production, various types of electronic components are used to protect circuits and electric appliances in order to ensure safe and stable operation of the circuits, and inductors are a very common component in industrial circuits. In particular, an inductor is a component capable of converting electrical energy into magnetic energy for storage, the inductor being similar in structure to a transformer and having only one winding. Although the inductor has a certain inductance, it only blocks the current change. When alternating current flows into the inductor, the inductor blocks the change of the alternating current, and the alternating current does not instantaneously get large and slowly increases; when alternating current flows out of the inductor, the inductor does not let it lose instantaneously, but slowly let it get smaller until it is completely lost. In addition to the above choke-off action and filtering action, the inductor has the functions of suppressing electromagnetic wave interference, screening signals, stabilizing current, and filtering noise, and is also called a choke, a reactor, a dynamic reactor, or the like.

Content of the application

According to a first aspect of the present application, there is provided an inductor having an inductance core and a coil wound on the inductance core and including a metal wire which generates a magnetic field when energized, an outer side of the metal wire being coated with a magnetic conductive material layer for concentrating magnetic lines of force of the magnetic field, and an outer side of the magnetic conductive material layer being coated with an insulating layer.

Optionally, in the inductor as described above, the thickness of the magnetic conductive material layer is 1/2-1 of the diameter of the metal wire; and/or the thickness of the magnetic conductive material layer is uniformly arranged.

Optionally, in the inductor as described above, the inductor core is in a shape of a ring.

Optionally, in the inductor as described above, the metal wire is made of copper; and/or the insulating layer is composed of an insulating varnish.

According to a second aspect of the present application, there is also provided a filter provided with the above-described inductor.

Optionally, in the filter as described above, the filter further includes a printed circuit board to which ends of the coil of the inductor are fixed by soldering.

Optionally, in the filter as described above, the coil includes a first coil wound on one half of the inductor core for inputting and outputting the positive electrode current, and a second coil wound on the other half of the inductor core for inputting and outputting the negative electrode current.

Optionally, in the filter as described above, the inductor core includes a first inductor core and a second inductor core, and the coil includes a first coil wound around the first inductor core for inputting and outputting the positive electrode current, and a second coil wound around the second inductor core for inputting and outputting the negative electrode current.

Optionally, in the filter as described above, the filter is provided with an insulating glue for reinforcing the inductor core.

According to a third aspect of the present application, there is also provided an electric vehicle provided with the filter described above.

It can be appreciated that the inductor according to the application can restrain the magnetic field lines generated by the metal coil at or near the magnetic conductive material layer by adopting the design of the magnetic conductive material layer, thereby avoiding the excessive leakage of the magnetic field lines into the air and further effectively increasing the magnetic field density.

Drawings

The present disclosure will become more readily understood with reference to the accompanying drawings. As will be readily appreciated by those skilled in the art: the drawings are for illustrative purposes only and are not intended to limit the scope of the present application. Moreover, like numerals in the figures are used to designate like parts, wherein:

fig. 1 shows a schematic structural diagram of an embodiment of an inductor according to the present application; and

Fig. 2 shows a schematic cross-sectional view of a coil of the inductor of fig. 1.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. First, terms of directions such as up, down, left, right, front, rear, inner, outer, top, bottom, etc. mentioned or possible in the present specification are defined with respect to the configurations shown in the drawings, and they are relative concepts, so that they may be changed according to different positions and different use states thereof. These and other directional terms should not be construed as limiting terms.

In the present application, the terms "mounted," "disposed," "arranged," "connected," "coupled," "joined" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

Fig. 1 shows a schematic block diagram of an inductor in accordance with the present disclosure. As is apparent from fig. 1, the inductor 100 is composed of an inductor core 110, a coil 120 wound around the inductor core 110, and the like. The inductor core 110 is, for example, a ring-shaped magnetic ring structure, so as to generate a relatively uniform magnetic field. As shown in fig. 2, the coil 120 includes a metal wire 121 made of a conductive material such as copper, and the metal wire 121 has a generally circular cross-sectional shape. Those skilled in the art will appreciate that the metal wire 121 is capable of generating a magnetic field when energized due to electromagnetic induction. Referring to fig. 1 and 2, in order to avoid excessive leakage of magnetic lines of force of a magnetic field into ambient air surrounding the inductor 100, the outer side of the metal wire 121 is coated with a magnetic conductive material layer 122 with high magnetic permeability, so as to concentrate magnetic lines of force of the magnetic field (including magnetic line a at the magnetic conductive material layer 122 and magnetic line B at the outer side of the magnetic conductive material layer 122) generated by the metal wire 121 when energized, so as to increase the density of the magnetic field. In this case, the magnetic lines of force B generated when each of the coils 120 is energized are merged into magnetic lines of force C in substantially the same direction, as indicated by the dot-dash arrow in fig. 1. Furthermore, for the purpose of preventing short circuit, the outer side of the magnetic conductive material layer 122 is coated with an insulating layer 123, and the insulating layer 123 may be, for example, a conventional insulating varnish in order to improve the insulating property thereof.

It is easily understood by those skilled in the art that the thickness, permeability, etc. of the magnetic conductive material layer 122 may be adjusted according to the application scenario and actual requirements of the inductor 100. Generally, the greater the thickness of the magnetic conductive material layer 122, the better the magnetic conductive effect. The magnetically permeable material layer 122 of the metal wire 121 may be provided to have a uniform thickness and uniform size for the purpose of manufacturing. For example, the thickness of the magnetic conductive material layer 122 is 1/2-1 of the diameter of the metal wire 121.

In addition, the application further provides a filter, the filter is provided with the inductor 100, and the inductor 100 is used for filtering, so that signals in partial frequency bands are filtered. The filter provided by the application has all the characteristics and advantages of the inductor described above and will not be described in detail herein. Specifically, the filter further includes a printed circuit board (not shown) to which the end of the coil 120 of the inductor 100 is fixed by soldering or the like. In particular, the coils may include a first coil wound on one half of the inductor core for inputting and outputting a positive current, and a second coil wound on the other half of the inductor core for inputting and outputting a negative current. As an alternative, the inductor core may further include a first inductor core and a second inductor core, and the coil includes a first coil wound around the first inductor core for inputting and outputting the positive electrode current, and a second coil wound around the second inductor core for inputting and outputting the negative electrode current.

In addition, the application also provides an electric vehicle, which is provided with the filter. The vehicle may be a private car, a taxi, a bus, a midbus or a bus, or the like. The electric vehicle provided by the application has all the characteristics and advantages of the filter described above, and is not described herein.

In summary, the inductor according to the present application can restrict the magnetic field lines of the magnetic field generated by the metal coil at or near the magnetic conductive material layer, thereby reducing magnetic leakage and increasing magnetic field density, and further improving filtering effect. It is therefore highly recommended to use the above-mentioned inductor in a filter, and to apply such a filter in an electric vehicle.

The inductor of the present application, the filter provided with the inductor, and the electric vehicle equipped with the filter are explained in detail above by listing several specific embodiments, which are merely for the purpose of illustrating the principle of the present application and the embodiments thereof, but not for the purpose of limiting the application, and various modifications and improvements can be made by those skilled in the art without departing from the spirit and scope of the application. For example, the filter is provided with an insulating glue (not shown) for reinforcing the inductor core 110. Accordingly, all equivalent arrangements should be considered to be within the scope of the present application and as defined in the claims.

Claims (10)

1. An inductor (100) having an inductive core (110) and a coil (120), the coil (120) being wound on the inductive core (110) and the coil (120) comprising a metal wire (121), the metal wire (121) generating a magnetic field when energized, characterized in that the outer side of the metal wire (121) is coated with a magnetically conductive material layer (122) for concentrating the magnetic field lines of the magnetic field, and the outer side of the magnetically conductive material layer (122) is coated with an insulating layer (123).

2. The inductor according to claim 1, characterized in that the thickness of the magnetically conductive material layer (122) is 1/2-1 of the diameter of the metal wire (121); and/or the thickness of the magnetic conductive material layer (122) is uniformly arranged.

3. The inductor according to claim 2, characterized in that the inductor core (110) is ring-shaped.

4. An inductor according to any one of claims 1-3, characterized in that the metal wire (121) is made of copper; and/or the insulating layer (123) is made of an insulating varnish.

5. A filter, characterized in that the filter is provided with an inductor (100) according to any of claims 1-4.

6. The filter according to claim 5, further comprising a printed circuit board, the ends of the coil (120) of the inductor (100) being fixed to the printed circuit board by soldering.

7. The filter of claim 5 or 6, wherein the coils comprise a first coil wound around one half of the inductor core for inputting and outputting positive current and a second coil wound around the other half of the inductor core for inputting and outputting negative current.

8. The filter of claim 5 or 6, wherein the inductor core comprises a first inductor core and a second inductor core, and the coil comprises a first coil wound around the first inductor core for inputting and outputting positive current and a second coil wound around the second inductor core for inputting and outputting negative current.

9. A filter according to claim 5 or 6, characterized in that the filter is provided with an insulating glue for reinforcing the inductor core.

10. An electric vehicle characterized in that the electric vehicle is configured with a filter according to any one of claims 5-9.