EP3803920A1

EP3803920A1 - Component forming at least two inductances

Info

Publication number: EP3803920A1
Application number: EP19726453.4A
Authority: EP
Inventors: Nicolas ALLALI
Original assignee: Valeo Systemes de Controle Moteur SAS
Current assignee: Valeo Systemes de Controle Moteur SAS
Priority date: 2018-06-08
Filing date: 2019-05-29
Publication date: 2021-04-14
Also published as: CN112262447B; WO2019233880A1; FR3082351B1; FR3082351A1; CN112262447A

Abstract

The invention relates to a component (1) forming at least two inductances (12), the component (1) comprising: - a structure (2) made of a magnetically conductive material, comprising: a base (7), a cover (8), at least one first leg (9) extending continuously between the base (7) and the cover (8) and at least two second legs (10), each second leg (10) extending between the base (7) and the cover (8) so that a magnetic flux circulating between the base (7) and the cover (8) via said second leg (10) passes through at least one air gap, and - an electrically conductive element (3) defining an electrical input (4) for the component and an electrical output (5) for the component, wherein the electrically conductive element (3) and the structure (2) cooperate so as to define at least two inductances (12), each inductance (12) having a magnetic flux circulating between the base (7) and the cover (8): - in a first leg (9), and - in a second leg (10) dedicated to said inductance (12).

Description

Component forming at least two inductors

The present invention relates to a component forming at least two inductors. This component may notably, but not exclusively, belong to a static converter of electrical energy, such as a DC / DC voltage converter, the component then providing all or part of the inductances of this converter.

The DC / DC voltage converter is for example a 12V / 48V voltage converter. In such cases, the inductances thus obtained serve, for example, to produce an EMC filter.

GB 2 442 090 discloses a component comprising a structure made of a magnetically conductive material on which several electrical wires are wound so as to form one or more inductors.

Application WO 2007/123564 discloses a one-piece structure forming an inductance.

There is a need to further improve the realization of inductors, especially for DC / DC voltage converters.

The invention aims to meet this need and it achieves, in one of its aspects, using a component forming at least two inductance, this component comprising:

a structure made of a magnetically conductive material, comprising: a base, a cover, at least a first leg extending continuously between the base and the cover, and at least two second legs, each second leg extending between the base and the cover so that a magnetic flux flowing between the base and the cover via this second leg passes through at least one gap, and

an electrically conductive element, in particular a ribbon, defining an electrical input for the component and an electrical output for the component,

the electrically conductive element and the cooperating structure so as to define at least two inductances, each inductor having a magnetic flux flowing between the base and the cover:

- in a first leg, and

in a second leg dedicated to this inductor.

According to the invention, the magnetic flux associated with each inductor flows in a first leg which extends continuously between the cover and the base, so that no air gap exists between the cover and the base for this circulation of the magnetic flux. via the first leg. This first leg can be dedicated to a respective inductance or common to both inductances. On the other hand, the circulation of this magnetic flux between the cover and the base via the second dedicated leg involves the crossing of at least one gap. The presence of the gap allows the storage of magnetic energy. The second legs differing from one inductor to another and one air gap is thus dedicated to an inductor, it promotes the decoupling between these two inductances since these gaps serve to store the magnetic energy of the inductor.

The inductances can be defined successively in the component.

For the purposes of the present application, an air gap is not necessarily a vacuum filled with air. An area wholly or partly occupied by a material whose magnetic permeability is lower than that of the structure of magnetically conductive material also defines a gap.

Still within the meaning of the invention, "consecutively" is assessed along the electrically conductive element, from the electrical input for the component to the electrical output for the component.

The value of the inductance can be arbitrary, being for example between 50 nH and 500 m / l.

The magnetic structure is for example made of ferrite, iron powder or nanocrystalline. This structure can be one-piece or consist of several separate parts, the latter then being rigidly fixed to each other, or not.

The electrically conductive element may have a flattened shape, being a then a ribbon also called "leadframe" in English. This ribbon is for example made of copper.

The electrical input for the component is for example connected to a voltage source, for example a voltage source 48 V, and the electrical output for the component is for example connected to consumers of the voltage network or to the switching cells. a static converter such as a DC / DC voltage converter.

The electrically conductive tape is for example different from a wound wire

The component is for example implanted on a printed circuit board. The component extends for example on either side of this printed circuit board, the base of the component then being located on one side of this printed circuit board, while the component cover is located on the other side side of this circuit board.

The first leg can be made in one piece with at least one of the base and the lid.

The first leg may be devoid of internal cavity. No gap exists then within this first leg.

The electrical input for the component and the electrical output for the component may be formed by two respective portions of the electrically conductive element, including mban, which extend parallel to each other.

The base and the cover may belong to separate parts, not both belonging to the same one-piece part. According to a first example of implementation of the invention, the electrically conductive element, in particular the ribbon, extends rectilinearly and the structure comprises at least two first legs, the magnetic flux associated with each inductance circulating between the base and the lid:

in a first leg dedicated to said inductor, and

in a second leg dedicated to said inductor,

the positions of the first and second legs relative to the electrically conductive element being in particular reversed between two consecutive inductances.

According to this first example of implementation, each inductor thus has: a first dedicated leg and a second dedicated leg.

The inverted position of the first and second legs relative to the electrically conductive element between two consecutive inductors allows the cover to be mounted stably on these legs.

All the first legs can have the same shape and the same size according to this first mode, and all the second legs can also have the same shape and the same dimension according to this first mode. It is thus possible to obtain different inductances of the same value. Three or four inductors are for example formed by the component.

According to a second example of implementation of the invention, the electrically conductive element, in particular the mban, extends so as to provide at least one return, two consecutive portions of the return of the element. electrically conductive being separated by a first leg, this first leg being traversed by the magnetic flux associated with each of the two inductors.

According to this second example of implementation, two inductors, in particular consecutive, thus share the same first leg.

Still according to this second example of implementation, a round trip of the electrically conductive element can define two consecutive portions separated by a first j ambe and framed by two second legs, in which case this round-trip portion defines successively two inductors , the flux associated with the first inductance flowing between the base and the cover, in the first leg and in one of the two second legs dedicated to this first inductor, and the flux associated with the second inductor flowing between the base and the cover, in the first leg and in the other of the two second legs dedicated to this second inductor.

According to this second example of implementation, the electrically conductive element can provide several round trips, portions of this element back and forth can be separated by a first leg and portions of this element back and forth can be separated through a second leg. In such a case, the separation distance between two round-trip portions defined by the presence of a second leg may be greater, for example to be double, the separation distance between two round-trip portions defined by the presence of a first leg.

According to a third example of implementation, the second legs define a peripheral wall of the component, so that the base, the cover and this peripheral wall together define a housing of the component, the structure comprises a single first leg and, the magnetic flux associated with each inductor flows between the base and the cover:

- in the first leg, and

in a second leg dedicated to said inductor.

According to this third example of implementation, the first leg is traversed by the flow associated with each inductor, this first leg being shared by the inductors. This first leg being devoid of air gap, thus ensures a decoupling of these different inductances.

The first leg may define a central beam around which is disposed the electrically conductive element, including the mban. The first leg is then exclusively inside the case.

Alternatively, the first leg may define an inner wall to the housing, delimiting for example two separate compartments in this housing. The ends of this first leg may or may not flush in this variant the periphery of the housing.

According to this third example of implementation, the peripheral wall can be made in one piece with at least one of the base and the lid. When the peripheral wall is not made in one piece with one of the base and the lid, the attachment between the latter elements can be effected via glue.

According to this third example of implementation, each gap can be formed by a vacuum between the peripheral wall and the housing cover. This vacuum may, in all or part, be occupied by the aforementioned adhesive which serves to fix the peripheral wall on one of the base and the cover.

The aforementioned vacuum can be obtained in two ways, for example:

the cover has, in a first manner, a face facing the plane peripheral wall, and the first leg extends in the direction of the lid on a dimension greater than that on which the peripheral wall extends in the direction of the lid, so as to spare the air gap by this difference in size,

the cover has, in a second manner, a face facing the peripheral wall with a flat peripheral zone and a central zone projecting towards the first leg, the wall; peripheral and the first leg extending in the same dimension towards the cover, so as to spare the air gap by the absence of projection at the peripheral zone of the face of the cover.

Still according to this third example of implementation, at least one cavity may be formed in the peripheral wall, so as to define two second legs together. N cavities are for example formed in the peripheral wall, so as to define N + 1 second legs. All the second legs can have the same shape and dimensions.

Each inductor can then have the same value, according to this third example of implementation.

When such a cavity is present, an outgrowth of the electrically conductive element, in particular mban, may extend into this cavity, this protrusion being able to be connected to a capacitor to form an LC filter. The connection of the protrusion to the capacitor is then performed outside the housing. The capacitance of the capacitor is for example between lnF and lOOmF. The inductances may be connected in series and each protrusion may correspond to a zone of the electrically conductive element, in particular mban, arranged between two inductors connected in series.

When several cavities are present, each may be occupied by a protrusion of the electrically conductive element, in particular mban, and each of these excrescences is then connected to a capacitor to form an LC filter. Another capacitor may be electrically connected to the electrical input for the component and / or another capacitor may be electrically connected to the electrical output for the component. Each capacitor is thus on the one hand connected to the electrically connector element, and on the other hand to ground.

Each cavity in the peripheral wall can communicate with:

an associated cavity formed in the base, and / or

an associated cavity formed in the cover.

The presence of these associated cavities in the base and / or the presence of these associated cavities in the cover may make it possible to reduce the parasitic inductances caused by the connection of the capacitors to the electrically conductive element.

According to the first and second examples of implementation:

- A vacuum can be formed between each second leg and one of the cover and the base, this vacuum being possibly occupied in whole or in part by glue for fixing between these elements, and

the electrically conductive element, in particular the ribbon, may comprise excrescences each capable of being connected to a capacitor to form an LC filter. In all of the above, the base and the cover may have the same shape, in particular polygonal, and the ratio between the height of the component and the square root of the area of the base may be less than 1, especially less than 0, 5.

When the base and the cover have the same polygonal shape, the second legs can all, or at least part of them, be positioned on the vertices of the polygons.

Still when the base and the cover have the same polygonal shape, the electrical input for the component and the electrical output for the component can be arranged on the same side of this polygon and the first leg can include an extension, forming in particular a zone thinned of the said first leg. This extension can extend continuously or not between the base and the cover, so as to form a magnetic screen between the electrical input and the electrical output for the component.

In all the above, the electrically conductive element, in particular the mban, can extend exclusively inside the component, that is to say according to the third example of implementation exclusively inside the housing , between the electrical input for the component and the electrical output for the component. For example, it is possible to generate magnetic fluxes of the same direction in the same first leg.

As a variant, in all the foregoing, the electrically conductive element, in particular the mban, may comprise at least two half-waves of portion extending inside the component, in particular the housing, and portion extending to the external component, including the housing. These alternations can allow magnetic fluxes of different directions to be generated in the same first leg.

In all of the foregoing, the electrically conductive element, especially the mban, and the structure can cooperate to form exactly four inductors. When each inductor is associated with a capacitor, in particular via the aforementioned excrescences, the component can make it possible to obtain a filter of order 8.

The invention is however not limited to a precise number of inductors formed by the component, any value between 2 and 10 being possible in particular.

In all of the above, the base and the cover of the structure can each have a rectangular, square or triangular section.

In all of the above, the inductances formed by the component may or may not be connected in series.

The invention further relates, in another of its aspects, a static converter of electrical energy, comprising the component as defined above. The converter can be a voltage converter. This is for example a DC / DC voltage converter, allowing for example:

the raising of a voltage of 12 V to a voltage of 48 V, or

the raising of a voltage from 300 V to a value of 800 V.

The switching frequency of this converter may be greater than 1 kHz, being for example between 1 and 100 kHz, being in particular of the order of 20 kHz.

When the voltage converter is a 12 V / 48 V converter, this converter may be part of an electrical circuit having: a 48 V part for electrical exchange with a 48 V alternator-starter and a 12 V part for the supply of consumers of the on-board vehicle network.

When the voltage converter is a 300 V / 800 V converter, this converter may be part of an electrical circuit for the exchange of electrical energy between an electrical energy storage unit and a hybrid vehicle electric motor or electric, or be part of an electrical circuit for the exchange of electrical energy between an electrical network external to the vehicle and an electrical energy storage unit on board the vehicle.

In another variant, the static converter may be an inverter.

The invention further relates, in another of its aspects, to an electric circuit for a hybrid or electric vehicle, comprising:

- the converter above, and

an electronic card, in particular a printed circuit board, defining a plane, the structure of the aforementioned component being disposed on either side of the plane of this card so that the base of this structure is on one side of this plane and that the cover of this structure is on the other side of this plane.

Housing exist for example in the card, in particular in the printed circuit board, to allow the passage of this card through the structure, for example by the peripheral wall of this structure according to the third implementation example mentioned above.

The invention will be better understood on reading the following description of non-limiting examples of implementation thereof and on examining the appended drawing in which:

FIG. 1 schematically represents a component according to a first exemplary implementation of the invention,

FIGS. 2 to 5 schematically represent different component variants according to a second example of implementation of the invention,

FIGS. 6 to 11 diagrammatically represent different variants of components according to a third example of implementation of the invention,

FIGS. 12 and 14 to 16 show a concrete embodiment of the component according to FIG. 8, FIG. 13 represents another concrete embodiment of the component according to FIG. 8,

FIG. 17 is a model of the electric circuit equivalent to the component of FIGS. 12 to 16, and

- Figure 18 shows an example of assembly of the component according to Figures 12 to 16 on a printed circuit board.

FIG. 1 shows a component 1 according to a first example of implementation of the invention. This component 1 here forms a plurality of inductors intended to form part of an EMC filter for DC / DC voltage converter 12 V / 48 V.

This component 1 comprises:

a structure 2 made of a magnetically conductive material, and

an electrically conductive element 3 which is here an electrically conductive tape 3, and which defines an electrical input 4 and an electrical output 5 for the component 1. Other examples of an electrically conductive element are possible, for example a section conductor circular.

In the example considered, the electrical input 4 is for example intended to be electrically connected to an electrical energy storage source of nominal voltage 48 V and the electrical output 5 is intended to be electrically connected to the switching cells of the converter. DC / DC voltage 12V / 48V.

In all the examples below, the electrically conductive strip 3 has a flattened shape, being different from a wound electrical wire. This electrically conductive tape 3 is for example made of copper.

The structure 2 is for example made of ferrite. In the examples below, the structure is formed by several separate pieces assembled together. The structure 2 is thus formed by:

a base 7,

- a cover 8,

at least one first leg 9 extending continuously between the base 7 and the cover 8, so that a magnetic flux flowing between the base 7 and the cover 8 via this first leg 9 does not pass through any gap, and

- Several second legs 10 extending between the base 7 and the cover 8 so that a magnetic flux flowing between the base 7 and the cover 8 via the second leg 10 passes through at least one gap. Each second leg 10 is here dedicated to an inductor.

In the examples described, the base 7 and the cover 8 each have a planar surface defining an end surface for the component 1. These end surfaces may be parallel and have the same shape and size. The ratio between the height of component 1, that is the distance between these two end surfaces, and the square root of the area of one of these end surfaces for the component 1 may be between 0.5 and 1. The component 1 thus has a flattened shape.

In the example of FIG. 1, it can be seen that the electrically conductive strip 3 extends rectilinearly within the structure 2 between its electrical inlet 4 and its electrical outlet 5.

In this example, it can still be seen that the structure has three first legs 9 and three second legs 10 and that the cooperation between this ribbon 3 and this structure 2 here defines three successive inductances 12.

The flux associated with each inductor flows between the base 7 and the cover 8 on the one hand via a first leg 9 dedicated to this inductor, and on the other hand via a second leg 10 dedicated to this inductor. No leg 9 or 10 is thus shared by several inductors according to this first example of implementation.

In this first example of implementation, each first leg 9 is for example made integrally with the base 7 and each second leg 10 is for example made integrally with the base 7. Each existing gap at a second level. leg 10 can come from the gap between the end of the second leg facing the cover 8 and the lid 8. This vacuum is for example due to the fact that the distance on which extends a first leg 9 from the base 7 to the cover 8 is greater than the corresponding distance for the second legs 10. In a variant, this gap is due to the fact that the surface of the cover 8 has a face facing the base 7 with projections at the first legs 9 coming from in contact with these first legs 9, while these protrusions are absent at the level of the second legs 10. In another variant, this void may be occupied by material, for example glue per second. putting the attachment of the second leg 10 to the lid 8.

In this first example, it can still be seen that, from one successive inductance 12 to the other, the respective positions of the first legs 9 and the second legs 10 alternate. So :

for the inductor 12 closest to the electrical input 4, the first leg 9 is situated on the right side of the electrically conductive strip 3 when it is circulated along this strip towards the electrical outlet 5 and the second leg 10 is located on the left of the electrically conductive tape 3, while

for the inductance 12 immediately following, the first leg 9 is located on the left of the electrically conductive mban 3 when it is circulated along this ribbon towards the electrical outlet 5 and the second leg 10 is located on the right electrically conductive tape 3.

We will now describe with reference to Figures 2 to 5 various components 1 according to a second example of implementation of the invention.

According to this second example of implementation, the electrically conductive strip 3 no longer extends rectilinearly inside the component 1. This ribbon 3 extends according to FIGS. 2 to 5 so as to provide several round trips, and the structure 2 comprises a plurality of first legs 9 and second legs 10.

It can be seen for example in FIG. 2 that the ribbon defines a round-trip, two consecutive portions 20 and 21 of a round-trip of the ribbon 3 being separated by a first leg 9. Two successive inductances 12 are thus defined by the cooperation between the ribbon 3 and the structure 2, namely:

a first inductor 12 at the portion 20 of the ribbon and having an associated magnetic flux which circulates between the base 7 and the cover 8: in the first leg 9, and in the second leg 10 which encloses this portion 20 with the first leg 9, and

a second inductor 12 at the portion 21 of the ribbon and having an associated magnetic flux which circulates between the base 7 and the cover 8: in the first leg 9, and in the second leg 10 which encloses this portion 21 with the first leg 9.

In the example of FIG. 4, the ribbon 2 defines three round trips, so that the cooperation between the mban 3 and the structure 2 defines four inductances.

It can be seen in FIG. 4 that the ribbon 3 has:

consecutive consecutive round-trip portions separated by a first leg 9, such consecutive round-trip portions corresponding to two inductors and

consecutive portions in return and separated by a second leg 10, such consecutive portions corresponding to the same inductance.

It can again be seen that two consecutive inductances thus defined share a first leg 9.

We will now describe with reference to Figures 6 to 18 various components 1 according to a third example of implementation of the invention.

According to this third example of implementation, several second legs 10 are always provided, and these second legs define a peripheral wall. The base 7, the cover 8 and this peripheral wall thus define a housing.

Still according to this third example of implementation, the first leg 9 is unique and is traversed by the magnetic flux associated with each inductor 12. This path of the first leg 9 by each magnetic flux thus constitutes a magnetic path without gap between the base 7 and the cover 8, which ensures a decoupling of the different inductances 12 between them.

Thus, the flux associated with an inductor circulates, according to this third example of implementation: through the first leg 9 which is shared with all the other inductors 12 defined by the component 1, and through the second leg 10 which is dedicated to this inductance. In FIGS. 6 to 9, the first leg 9 is a central beam which is substantially disposed at the center of the surfaces facing the base 7 and the cover 8.

It can be seen for example in FIGS. 6 and 7 that the facing surfaces of the base 7 and the cover 8 can have a triangular shape and that all the second legs 10 of the structure 2 can be positioned respectively at an apex of this triangle. Three inductances are defined in the cases of Figures 6 and 7.

It is also noted in Figures 8 and 9 that the facing surfaces of the base 7 and the cover 8 may alternatively have a square shape. Again, all the second legs 10 of the structure 2 can be positioned respectively at an apex of this square. Four inductances are defined in the cases of Figures 8 and 9.

The shape of these surfaces facing the base 7 and the cover 8 is not limited to a triangle or a square, which may be other, for example rectangular as shown in Figures 10 and 11, or other, not necessarily polygonal .

In Figures 10 and 11, it is also noted that the first leg 9 of the component may be other than a central beam. In these figures 10 and 11, the first leg defines an inner wall that may or may not extend all along the surfaces facing the base 7 and the cover 8, so as to define compartments in the housing. Six inductances 12 are defined by the cooperation between the ribbon 3 and the structure 2 in the case of FIGS. 10 and 11.

It is also found, similarly to what has been described above, that the ribbon 3 does not necessarily extend exclusively inside the housing between the electrical input 4 of the component 1 and its electrical output 5.

Thus, if the ribbon 3 extends exclusively inside the casing in the cases of FIGS. 6, 8 and 10, this ribbon 3 comprises portion alternations exclusively inside the casing and portion exclusively outside. of the case in the cases of FIGS. 7, 9 and 11.

Reference will now be made with reference to FIGS. 12 to 18 of concrete examples of embodiment of a component 1 according to FIG.

This component 1 thus comprises a structure 2 defining a housing having:

a base 7 made of ferrite and having a square surface, whose side measures for example 24 mm,

a cover 8 made of ferrite and having a square surface of the same size

a peripheral wall formed by the union of the second legs 10, the latter being here four in number, and

- A first single leg 9, forming a central beam for the housing. It can be seen that the electrical input 4 for the component and the electrical output 5 for this component are on one and the same face of the housing, two rectilinear and parallel ends of this strip 3 then respectively forming this electrical input 4 and this electrical output 5.

In the example of Figures 12 to 18, the base 7 and each second leg 10 of the housing are made integrally, while the cover 8 is a separate piece, assembled on the peripheral wall.

The peripheral wall of the housing comprises four second legs 10 which are delimited between them by cavities 30 formed along the entire height of this peripheral wall in the example described.

In the example of Figures 12 and 13, each cavity 30 communicates with an associated cavity 31 formed in the base 7 and extending the cavity 30 at the base.

In the example of Figure 12, but not in that of Figure 13, each cavity 30 also communicates with an associated cavity 32 formed in the cover 8 and extending the cavity 30 at the cover.

It can be seen in particular in FIGS. 14 and 15 that the central beam forming the first leg 9 may have, in a section parallel to the facing surfaces of the base 7 and the cover 8, substantially a square shape, with the exception of one extension 35 disposed between the portions of the mban 3 defining the electrical input 4 for the component 1 and the electrical output for this component 1. This extension 35 can extend continuously from the base 7 to the cover 8 and then constitute a magnetic screen for the electrical input 4 vis-à-vis the magnetic output 5.

Still in FIGS. 14 and 15, it can be seen that the electrically conductive strip 3 has inside the housing a succession of rectilinear portions extending around the first leg 9.

Four inductors 12 are formed by the component 1, thanks to the cooperation between the electrically conductive mban 3 and the structure in magnetically conductive material 2.

The flux associated with an inductor 12 flows between the base 7 and the cover 8:

via the first leg 9, without crossing an air gap, and

via a second leg of the peripheral wall, dedicated to this inductance.

The presence of an air gap for each inductor 12 is obtained thanks to the vacuum existing between the cover 8 and the second leg 10 dedicated to this inductor 12.

This vacuum can be obtained in two ways, for example:

- The cover 8 has a face facing the flat peripheral wall, and the first leg 9 extends towards the surface of the cover 8 on a dimension greater than that on which extends the peripheral wall in the direction of the cover, so as to spare the air gap by this difference in size, or

the cover 8 has a face facing the peripheral wall with a flat peripheral zone and a central zone projecting towards the first leg 9 with respect to the plane peripheral zone, the peripheral wall and the first leg 9 extending according to the same dimension in the direction of the cover, so as to spare the gap by the absence of projection at the peripheral zone of this face of the cover.

It can be seen in FIG. 15 that the ribbon 3 may, in addition to the portions extending around the first leg 9, comprise protrusions 40 extending outwardly of the housing, through the peripheral wall. Each protrusion 40 for example passes through a cavity 30 beyond which it extends to be electrically connected to a capacitor 41.

capacitors 41 being shown very schematically in FIG. 16. It can be seen that two additional capacitors 41 are provided, one being connected to the electrical input 4 for the component and the other being connected to the electrical output 5 for the component.

FIG. 17 represents the equivalent electrical circuit of the component of FIG. 16, considering the electrical tape 3 between the electrical input 4 for the component 1 and the electrical output 5 for the component 1. It can be seen that this component can enable the obtaining an LC filter of order 8, the inductances 12 being provided by the cooperation between the ribbon 3 and the structure 2, and the capacitors 41 being connected between the mban 3 and the mass.

The component 1 which has just been described with reference to FIGS. 1 to 17 is for example assembled on a printed circuit board 50, the structure 2 of the component being disposed on either side of the plane defined by this printed circuit board. 50, as will now be described in the particular case of the housing of Figures 12 to 17.

Housing 45 is provided in this printed circuit board, so that each second leg 10 and the first leg 9 can pass through this printed circuit board 50. These second legs 10 and the first leg 9 are then introduced through these housings 45 so that the base 7 integral with these legs 9 and 10 is arranged on one side of this printed circuit board 50. The ribbon 3 can be fixed, in particular by brazing, on the face of this printed circuit board 50 defining this side. The cover 8 is then assembled on the first leg 9 and on the second legs 10 from the other side of the printed circuit board 50.

The assembly of the cover 8 on the peripheral wall is obtained for example by means of glue 52, for example an "eccobond D125F" type glue which is applied to the ends of these second legs 10 facing the cover 8. Thus, the vacuum mentioned above to define the air gaps is occupied in whole or in part by the glue. As already mentioned, one possible application of the invention is the use to provide an EMC filter for a DC / DC voltage converter 12 V / 48 V.

Claims

claims

1. Component (1) forming at least two inductances (12), the component (1) comprising:

a structure (2) made of a magnetically conductive material, comprising: a base (7), a cover (8), at least one first leg (9) extending continuously between the base (7) and the cover (8) and at least two second legs (10), each second leg (10) extending between the base (7) and the cover (8) so that a magnetic flux flowing between the base (7) and the cover (8) via this second leg (10) passes through at least one gap, and

an electrically conductive element (3) defining an electrical input (4) for the component and an electrical output (5) for the component,

the electrically conductive element (3) and the structure (2) cooperating to define at least two inductances (12), each inductor (12) having a magnetic flux flowing between the base (7) and the cover (8):

in a first leg (9), and

in a second leg (10) dedicated to said inductor (12).

the base (7) and the lid (8) do not belong to the same one-piece part.

2. Component according to claim 1, the first leg (9) being made in one piece with at least one of the base (7) and the lid (8).

3. Component according to claim 1 or 2, the first leg (9) being devoid of internal cavity.

4. Component according to any one of claims 1 to 3, the element (3) electrically conductive extending rectilinearly and the structure (2) comprising at least two first legs (9), the magnetic flux associated with each inductance flowing between the base (7) and the cover (8):

in a first leg (9) dedicated to said inductor (12), and

in a second leg (10) dedicated to said inductor (12)

5. Component according to any one of claims 1 to 3, the element (3) electrically conductive extending to provide at least one round trip, two consecutive portions (20, 21) of a round trip of the element (3) being separated by a first leg (9), this first leg (9) being traversed by the magnetic flux associated with each of the two inductors (12)

6. Component according to any one of claims 1 to 3, the second legs (10) defining a peripheral wall of the component, so that the base (7), the cover (8) and the peripheral wall together define a housing component (1), the structure (2) comprising a single first leg (9), the magnetic flux associated with each inductor (12) flowing between the base and the cover: in the first leg (9), and

in a second leg (10) dedicated to said inductor.

7. Component according to claim 6, the peripheral wall being made in one piece with at least one of the base (7) and the cover (8).

8. Component according to one of claims 6 and 7, each gap being formed by a vacuum between the peripheral wall and the cover (8) of the housing.

9. Component according to any one of claims 6 to 8, at least one cavity (30) being formed in the peripheral wall, so as to define two second legs (10) therebetween.

10. Component according to claim 9, the element (3) electrically conductive comprising at least one protrusion (40) extending into the cavity (30), this protrusion (40) being able to be connected to a capacitor (41). to form an LC filter.

11. Component according to any one of the preceding claims, the base (7) and the cover (8) having a same shape, in particular polygonal, and the ratio between the height of the component and the square root of the area of the base. being less than 1.

12. Component according to any one of the preceding claims, the element (3)

electrically conductive element extending exclusively inside the component (1), in particular the housing, between the electrical input (4) for the component and the electrical output (5) for the component.

13. Component according to any one of claims 1 to 11, the element (3) electrically conductive comprising at least two half-wave portions extending inside the component, in particular the housing, and portion extending to the outside of the component, in particular the housing.

14. Component according to any one of the preceding claims, the element (3)

electrically conductive and the stmcture (2) cooperating to define exactly four inductors.

15. Voltage converter, in particular of DC / DC voltage, in particular DC / DC voltage converter 12 V / 48 V, comprising a component according to any one of the preceding claims.

An electric circuit for a hybrid or electric vehicle, comprising:

the converter according to claim 15, and

an electronic card (50), in particular a printed circuit board, defining a plane, the structure (2) of the component (1) being disposed on either side of the plane of this card so that the base (7) this structure is on one side of this plane and the cover (8) of this structure is on the other side of this plane.

17. Electrical circuit according to claim 16, housing (45) existing in the card (50) to allow the passage of this card through the structure (2), in particular by the peripheral wall of this structure.