CN214956341U

CN214956341U - Copper coil inductor

Info

Publication number: CN214956341U
Application number: CN202120762099.4U
Authority: CN
Inventors: 董娜; 吴伟华; 袁文琦; 卢进
Original assignee: United Automotive Electronic Systems Co Ltd
Current assignee: United Automotive Electronic Systems Co Ltd
Priority date: 2021-04-14
Filing date: 2021-04-14
Publication date: 2021-11-30
Anticipated expiration: 2031-04-14

Abstract

The utility model provides a copper loop inductance, include: at least one magnetic core having at least one winding leg; at least one copper coil, copper coil winding the wrapping post, copper coil have the breach department, the copper coil is provided with relative first end and second end, first end with second end position perpendicular to on the axial coplanar of wrapping post, first end and second end electric connection are on the PCB board, and when the copper coil was two at least, two at least copper coils passed through the PCB board switches on. The inductance value of a circle coil can be realized to a copper ring, consequently, for prior art's spiral inductance, the utility model discloses a copper ring area reduces, and works as when the copper ring is at least two, the copper ring passes through PCB board intercommunication. The copper rings are mutually independent, can be made into any shape, and have any thickness, great flexibility and better heat dissipation.

Description

Copper coil inductor

Technical Field

The utility model belongs to the technical field of the magnetic components and parts technique and specifically relates to a copper loop inductance is related to.

Background

With the increase of social demands and the development of semiconductor devices, the switching power supply has very wide application and wide development in the aspects of communication, new energy vehicles, photovoltaic inversion, medical electronics and the like, and the switching power supply is also rapidly developed towards the direction of higher power and higher power density. In a switching power supply, a high-power inductor is often an indispensable magnetic element and plays important functions of energy storage, ripple smoothing and the like. For example, in a new energy automobile, a high-voltage direct current converter (DCDC) is an important module, the power is about 2kW to 3kW, and the DCDC takes power from a high-voltage battery or a power grid to supply power to vehicle-mounted low-voltage equipment or a low-voltage battery. High voltage direct current converters (DCDC) are usually implemented with phase-shifted full-bridge circuits, as shown in fig. 1. In a high voltage direct current converter (DCDC), there is usually a high power inductor L, because of the inductance requirement, the number of turns is usually more than 1 turn, and because of the power requirement, the coil has to bear a large current of 100A to 250A, so the coil has a thicker copper thickness.

In the prior art, a spiral copper coil is generally used in the industry to make the inductance coil, that is, a copper flat wire is directly wound into a coil, sleeved into a magnetic core, and then connected with a main board. There are several disadvantages to using a helical copper ring: 1. the volume is wasted, if the inductance of the n-turn coil is to be realized, the window area of the magnetic core of the n + 1-turn coil needs to be occupied due to the relation of the outgoing line, and the copper thickness of the coil is thicker, which causes greater volume waste, for example, fig. 2 is a front view of the spiral coil inductance, 1 magnetic core, wherein 2 is the winding post of the magnetic core, 3 is the spiral copper coil, 4 is the inductance incoming line (or outgoing line), 5 is the inductance outgoing line (or incoming line), and due to the characteristics of the spiral coil, fig. 2 realizes the inductance of the 3-turn coil, but occupies the size of four copper thicknesses; 2. the design flexibility of the spiral copper ring is poor, the copper is wound into the copper ring, the copper ring often has the requirements of the width-thickness ratio of a copper sheet, the forming shape and the like, for example, the width-thickness ratio is often hoped to be less than 15, the inner ring is generally hoped to be circular, otherwise, the insulating layer is easy to damage, and the design cannot be freely realized; 3. the heat dissipation is poor, and the spiral copper circle of many circles piles up, and heat can be concentrated, and the heat dissipation also is difficult to have all special designs in the aspect of.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a copper loop inductance can reduce the area of the magnetic core window that occupies.

In order to achieve the above object, the utility model provides a copper loop inductance, include:

at least one magnetic core having at least one winding leg;

at least one copper coil, the copper coil winding the wrapping post, the copper coil has the breach department, the copper coil is provided with relative first end and second end, first end with the second end is located the perpendicular to on the axial coplanar of wrapping post, first end with second end electric connection is on the PCB board.

Optionally, in the copper coil inductor, when there are at least two copper coils, the copper coils are stacked along the axial direction of the winding post, and the copper coils are conducted through the PCB.

Optionally, in the copper coil inductor, the number of the copper coils is two, the number of the winding posts is one, the two copper coils are wound around the winding posts, and the two copper coils are electrically connected to the PCB and are communicated with the PCB.

Optionally, in the copper coil inductor, the number of the copper coils is multiple, the number of the winding posts is one, the copper coils are wound around the winding posts, and the two copper coils are electrically connected to the PCB and are communicated with the PCB.

Optionally, in the copper coil inductor, the copper coil includes an inner ring and an outer ring, and a longitudinal section of the inner ring is arc-shaped or square.

Optionally, in the copper coil inductor, an axial direction of the winding post is perpendicular to a radial direction of the inner ring.

Optionally, in the copper coil inductor, a longitudinal section of the outer ring is an irregular polygon.

Optionally, in the copper coil inductor, the outer ring has an extension perpendicular to an axial direction of the winding post.

Optionally, in the copper coil inductor, the outer ring has a protruding portion protruding outward in a radial direction of the inner ring.

Optionally, in the copper coil inductor, the outer ring has a folded portion that is bent in the axial direction of the inner ring.

Optionally, in the copper coil inductor, a shielding layer is disposed on a surface of the copper coil.

The utility model provides a pair of among copper loop inductance, include: at least one magnetic core having at least one winding leg; at least one copper coil, the winding the wrapping post, the copper coil has the breach department has first end and second end, first end with second end position perpendicular to on the coplanar of wrapping post, first end with the second end is connected on the PCB board, for prior art's spiral inductance, the utility model discloses in, the inductance value of a circle coil just can be realized to a copper coil, consequently, copper coil area reduces to, the copper coil is independent, and the copper coil can be made any shape, arbitrary thickness, consequently, the flexibility is big, and the thermal diffusivity is better.

Drawings

FIG. 1 is a schematic diagram of a high voltage DC converter;

FIG. 2 is a schematic diagram of a prior art inductor;

fig. 3a to 3b are schematic structural diagrams of a copper coil inductor according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a copper ring according to a first embodiment of the present invention;

fig. 5 is a schematic structural view of a copper ring according to a second embodiment of the present invention;

fig. 6a to 6b are schematic structural views of a copper ring according to a third embodiment of the present invention;

fig. 7 is a schematic structural diagram of a copper ring according to a fourth embodiment of the present invention;

in the figure: 1-magnetic core, 2-winding post, 3-spiral inductor, 4-inductor incoming line, 5-inductor outgoing line, 10-magnetic core, 20-winding post, 30-copper ring, 31-extension part, 32-bulge part and 33-turn-up part.

Detailed Description

The following description of the embodiments of the present invention will be described in more detail with reference to the drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.

In the following, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances. Similarly, if the method described herein comprises a series of steps, the order in which these steps are presented herein is not necessarily the only order in which these steps may be performed, and some of the described steps may be omitted and/or some other steps not described herein may be added to the method.

The utility model provides a copper loop inductance, include:

at least one magnetic core having at least one winding leg;

at least one copper coil, the copper coil winding the wrapping post, the copper coil has the breach department, the copper coil is provided with relative first end and second end, first end with the second end position perpendicular to on the axial coplanar of wrapping post, first end with second end electric connection is on the PCB board, works as when the copper coil is at least two, at least two the copper coil passes through the PCB board switches on.

The embodiment of the utility model provides an use a magnetic core as the example, the shape of magnetic core can be type E or U type. Here, taking an E-like core as an example, the middle portion of the core has a winding post, two copper coils are wound on the winding post, the copper coils are in a single piece, each of the two copper coils has a notch, at the notch, the copper coils are provided with a first end and a second end opposite to each other, for example, the first copper coil has a first end and a second end at the notch, the second copper coil has a third end and a fourth end at the notch, the first end, the second end, the third end and the fourth end can be welded on the PCB board or inserted into the PCB board by means of a card insertion, and the second end and the third end are conducted by a circuit on the PCB board, so that the two copper coils are equivalent to two coils. If in the form of a plurality of copper rings 30, similar joining methods may be used to join the plurality of copper rings 30. For example, in the case of three copper coils, referring to fig. 3a and 3b, the middle portion of the magnetic core 10 has one winding post 20, three copper coils 30 are wound on the winding post 20, the copper coils 30 are in a single piece, and the three copper coils 30 have notches and both ends at the notches. For example, the first copper ring has a first end and a second end at the notch, the second copper ring has a third end and a fourth end at the notch, the third copper ring has a fifth end and a sixth end at the notch, the first end, the second end, the third end, the fourth end, the fifth end and the sixth end can be welded on the PCB or inserted into the PCB by inserting a card, the second end and the third end are communicated by a circuit on the PCB, and the fourth end and the fifth end are communicated by a circuit on the PCB, so that the three copper rings are equivalent to three coils. In addition to the way of connecting the coil by inserting it on the PCB, other connection ways are also possible in other embodiments of the present invention, for example, the second end and the third end or the fourth end and the fifth end are directly connected by a wire, so that two copper rings or three copper rings are connected. Here, the copper ring includes an inner ring and an outer ring, the longitudinal section of the inner ring may be circular arc or square, and the longitudinal section of the outer ring may be any shape, that is, the copper ring 30 may exist in any shape.

Next, the copper coil inductor of the present invention is further explained by a plurality of embodiments.

Example one

Please refer to fig. 4, which is a schematic diagram of a longitudinal section of the copper ring (a plane perpendicular to the axial direction of the winding post), the longitudinal section of the inner ring of the copper ring 30 of the embodiment of the present invention is an arc shape, the outer ring is an irregular polygon shape, and simultaneously, the embodiment of the present invention provides a copper ring 30 with a notch, at the notch, the copper ring is provided with a first end and a second end, and the two ends can be inserted into a PCB board (not shown in the figure) to switch on the plurality of copper rings 30. The non-notched part of the copper coil 30, for example, the part opposite to the notch has a rectangular or square extension 31, the extension 31 has a larger area and can be used for heat dissipation, meanwhile, the extension direction of the extension 31 is perpendicular to the axial direction of the winding post, so that the adjacent copper coil is not affected, and a magnetic part with high power density can be realized.

Example two

Please refer to fig. 5, which is a schematic diagram of a longitudinal section (a plane perpendicular to the axial direction of the winding post) of the copper coil, in which the inner ring of the copper coil 30 according to the embodiment of the present invention is arc-shaped, and the radial direction of the inner ring is perpendicular to the axial direction of the winding post; the outer ring is also arc-shaped, but the outer ring has a protrusion 32 protruding outward in the radial direction of the inner ring (the direction in which the inner ring extends toward the outer ring), the protrusion 32 can be used to fix the copper ring 30, or the protrusion 32 can be connected to other heat dissipation elements, the protrusion 32 can be located at a position opposite to the notch, or other positions of the copper ring 30 outside the notch, and the protrusion direction of the protrusion 32 is perpendicular to the axial direction of the winding post, so that the adjacent copper ring is not affected. The protruding portion 32 can also be connected with other heat dissipation elements, and the convenience is derived the heat of copper ring 30, and protruding portion 32 has increased the surface area of copper ring 30 simultaneously, can increase the heat dissipation.

EXAMPLE III

Referring to fig. 6a and 6b, fig. 6a is a schematic diagram of a longitudinal section (a plane perpendicular to the axial direction of the winding post) of the copper coil, fig. 6b is a schematic diagram of a cross section (a plane parallel to the axial direction of the winding post) of the copper coil, the inner ring of the copper coil 30 is arc-shaped, a part of the outer ring follows the shape of the inner ring to be arc-shaped, and the outer ring is also provided with a notch. The folded portion 33 is provided at a position facing the notch or other position than the notch along the axial direction of the circular arc, and the folded direction of the folded portion 33 may be any direction along the axial direction of the inner ring. The folded portion 33 can occupy a smaller volume, and achieve a better heat conduction.

Example four

Referring to fig. 7, the inner ring of the copper ring 30 according to the embodiment of the present invention is polygonal, the outer ring is also polygonal, the polygon may be a regular polygon or an irregular polygon, and the outer ring may be identical to or different from the polygon shape of the inner ring. This kind of polygonal condition prior art spiral inductance is unable to do, and prior art spiral inductance requires that the inner circle must be circular, and the copper ring of the utility model discloses the embodiment can be any shape through forming. And the shape does not affect the inductance.

The above various features can be combined arbitrarily to form a copper ring in various forms, for example, irregularities, protrusions or folded portions can be integrated into a copper ring wholly or partially.

To sum up, in the embodiment of the utility model provides an in the copper loop inductance, include: at least one magnetic core having at least one winding leg; at least one copper coil, the winding the wrapping post, the copper coil has the breach department has first end and second end, first end with second end position perpendicular to on the coplanar of wrapping post, first end with the second end is connected on the PCB board, for prior art's spiral inductance, the utility model discloses in, the inductance value of a circle coil just can be realized to a copper coil, consequently, copper coil area reduces to, the copper coil is independent, and the copper coil can be made any shape, arbitrary thickness, consequently, the flexibility is big, and the thermal diffusivity is better.

The above description is only for the preferred embodiment of the present invention, and does not limit the present invention. Any technical personnel who belongs to the technical field, in the scope that does not deviate from the technical scheme of the utility model, to the technical scheme and the technical content that the utility model discloses expose do the change such as the equivalent replacement of any form or modification, all belong to the content that does not break away from the technical scheme of the utility model, still belong to within the scope of protection of the utility model.

Claims

1. A copper coil inductor, comprising:

at least one magnetic core having at least one winding leg;

2. The copper coil inductor according to claim 1, wherein when the number of the copper coils is at least two, the copper coils are stacked in an axial direction of the winding post, and the copper coils are conducted through the PCB board.

3. The copper coil inductor according to claim 1, wherein the number of the copper coils is two, the number of the winding posts is one, the two copper coils are wound around the winding posts, and the two copper coils are electrically connected to a PCB and communicated through the PCB.

4. The copper coil inductor according to claim 1, wherein the number of the copper coils is plural, the number of the winding post is one, the plural copper coils are wound around the winding post, and two of the copper coils are electrically connected to a PCB and communicate with the PCB.

5. The copper coil inductor according to claim 1, wherein the copper coil comprises an inner ring and an outer ring, and the longitudinal section of the inner ring is circular arc or square.

6. The copper coil inductor as claimed in claim 5, wherein the axial direction of said winding leg is perpendicular to the radial direction of said inner coil.

7. The copper coil inductor according to claim 5, wherein the longitudinal section of the outer ring is an irregular polygon.

8. The copper coil inductor as claimed in claim 5, wherein said outer turns have an extension perpendicular to an axial direction of said winding legs.

9. The copper coil inductor according to claim 5, wherein the outer ring has a convex portion that is convex outward in a radial direction of the inner ring.

10. The copper coil inductor according to claim 5, wherein the outer ring has a folded portion folded in an axial direction of the inner ring.

11. The copper loop inductor of claim 1, wherein the surface of the copper loop has a shielding layer.