Capacitor for the DC bus of an inverter
The capacitor design for the DC bus of an inverter simplifies manufacturing by using elastic pivoting connecting parts for efficient laser welding, addressing the high cost and complexity of existing methods.
Patent Information
- Application Number
- FR2024000660
- Authority / Receiving Office
- FR · FR
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2024-01-24
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2044-01-24
AI Technical Summary
Manufacturing a continuous bus for the DC bus of an inverter is expensive and requires many manufacturing steps.
A capacitor design for the DC bus of an inverter featuring a flattened coil with electrodes connected to busbars through elastic pivoting connecting parts, allowing for efficient laser welding of busbars to the electrodes, simplifying the manufacturing process.
The solution enables a cost-effective and efficient manufacturing process for the continuous bus, ensuring optimal electrical connections and reducing the complexity and cost of assembly.
Smart Images
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Abstract
Description
Title of the invention: Capacitor for the DC bus of an inverter technical field
[0001] The invention relates to the field of inverters for electric motors of a motor vehicle. It relates more particularly to a capacitor for a DC bus of an inverter. Technological background
[0002] The DC bus capacitor is also called a DC current capacitor or DC-link capacitor.
[0003] Battery-powered electric vehicles have an array of energy storage cells for the drive system, an electric drive motor, and a power controller equipped with an inverter. The inverter converts the energy from the energy storage cells to the motor drive system. In this architecture, a DC-link capacitor plays an important role.
[0004] The DC-Link capacitor is designed to stabilize the DC voltage, limiting its fluctuations, because from time to time the inverter requires a high current.
[0005] Manufacturing a continuous bus is expensive and requires many steps. Summary of the invention
[0006] One idea underlying the invention is to provide a capacitor for a DC bus allowing the implementation of a simplified DC bus manufacturing process.
[0007] According to one embodiment, the invention provides a capacitor for the DC bus of an inverter, comprising: - a coil formed by a metal strip and an insulating sheet wound around a winding axis, the coil being flattened along a flattening direction perpendicular to the winding axis, so as to present two opposite principal faces elongated along a principal axis perpendicular to the winding axis and to the flattening direction, - two electrodes, each electrically connected to one of the two opposite main faces of the coil, each electrode comprising an electrical connection part connected to the corresponding main face of the coil, an electrical connection part adapted to be electrically connected to a busbar of the DC bus, and a linking part connecting the connection part and the linking part and extending in an extension direction beyond one of the main faces of the coil, the connecting part of each electrode is connected to the linking part by an elbow which is oriented so that the connecting part has a longer free end away from the coil than the bend along the extension direction and which permits elastic pivoting of the connecting part around a pivot axis orthogonal to the extension direction; and the connecting parts of the two electrodes being positioned on the same side of the coil so as to permit electrical connection of the two electrodes with busbars of the DC bus located on the same side of the coil.
[0008] According to one embodiment, the extension direction of the connecting part is parallel to the flattening direction of the coil.
[0009] According to one embodiment, each of the electrodes comprises a plate having a portion attached against the corresponding main face of the coil and forming the electrical connection part of said electrode, the plate extending beyond the main face of the coil, along the direction of flattening of the coil, on one side, by said connection part, and on the opposite side, by a support part adapted to bear against a support piece receiving said capacitor.
[0010] According to one embodiment, the electrode connecting parts have a rest position in which said connecting parts are inclined at a non-zero angle with respect to a plane passing through the winding axis and the main axis of the coil.
[0011] According to one embodiment, the connecting parts of the two electrodes are oriented towards each other, in the same direction or in opposite directions.
[0012] According to one embodiment, the extension direction of the connecting part of each electrode is parallel to the winding axis of the coil.
[0013] According to one embodiment, the electrode connecting parts have a rest position in which said connecting parts are inclined at a non-zero angle with respect to a plane orthogonal to the winding axis.
[0014] According to one embodiment, the connecting parts of the two electrodes extend opposite one of the main faces of the coil and are oriented towards each other.
[0015] According to one embodiment, at least one of the electrodes has a U-shaped profile, with two branches extending from a base, one of the two branches forming the connecting part, the other branch forming the joining part and the base forming the linking part of the electrode.
[0016] According to one embodiment, the invention provides a continuous bus for an inverter, comprising: - at least two capacitors as described previously, - two busbars, each electrically connected to one of the electrodes of each of the two capacitors.
[0017] According to one embodiment, each busbar is welded by laser welding by transparency to one of the electrodes of each of the two capacitors.
[0018] According to one embodiment, the invention provides a method for manufacturing a continuous bus for an inverter, according to which: - at least two capacitors are provided as described previously; - The connecting part of each electrode of the two capacitors is placed against one of two busbars located on the same side of the coil, by elastically rotating each connecting part towards the coil, - omnibus bars are welded to the electrode connection parts by laser welding through transparency.
[0019] According to one embodiment, the invention provides an inverter, comprising a continuous bus as described above.
[0020] According to one embodiment, the invention provides a motor vehicle comprising an electric motor and an inverter as described above. Brief description of the figures
[0021] The invention will be better understood, and other objects, details, features and advantages thereof will become more apparent from the following description of several particular embodiments of the invention, given solely by way of illustration and not limitation, with reference to the accompanying drawings.
[0022] Fig. 1 represents a schematic perspective view of a continuous bus 1.
[0023] Figure [Fig. 2] represents a front perspective view of a first example of a electrical assembly of the continuous bus of the [Fig.l].
[0024] Fig. 3 represents a rear perspective view of the electrical assembly of the continuous bus of Fig. 2.
[0025] Fig. 4 represents a rear perspective view of the capacitor bank of the DC bus electrical assembly of Fig. 2.
[0026] Fig. 5 represents a rear perspective view of a capacitor from the capacitor row of Fig. 4.
[0027] Fig. 6 represents a perspective view of the capacitor of Fig. 5.
[0028] Fig. 7 represents a front perspective view of a second example of the continuous bus electrical assembly of Fig. 1.
[0029] Fig. 8 represents a side view of the DC bus capacitor row of Fig. 7.
[0030] Fig. 9 represents a front perspective view of a capacitor in the DC bus capacitor row of Fig. 8.
[0031] Fig. 10 represents a rear perspective view of the capacitor in Fig. 9. Description of the implementation methods
[0032] Figure [1] represents a continuous bus 1 comprising an electrical assembly according to one or the other of two examples of implementation described in more detail below.
[0033] The continuous bus 1 includes a box 2. This box 2 is, for example, insulating and made of plastic. Alternatively, the box 2 may be metallic.
[0034] The box 2 has a generally parallelepiped shape, elongated along a longitudinal axis L. It comprises a base from which four opposing lateral walls rise. Two opposing longitudinal lateral walls 2A have, along their free edge, a plurality of recesses 2B for electrical connection tabs 4 of the busbars 6, 7 of the continuous bus 1 described below. The box 2 is open at the front.
[0035] Box 2 houses an electrical assembly such as those shown in Figures 2 and 7, partially embedded in a protective resin.
[0036] This electrical assembly comprises a plurality of capacitors 100; 200, that is to say at least two capacitors, for example here six capacitors 100; 200, and two bus bars 6, 7.
[0037] Each capacitor 100; 200 is electrically connected to two bus bars 6, 7. Each of the two bus bars is electrically connected to one of the electrodes of each of the capacitors, described in more detail below.
[0038] In addition, insulating plates 8 are provided between the bus bars 6, 7 and between the capacitors 100; 200 in order to electrically isolate them from each other in the box 2.
[0039] Each capacitor 100; 200 comprises a coil 10; 20 formed by a metal strip and an insulating sheet wound around a winding axis E, the coil being flattened along a flattening direction A perpendicular to the winding axis E. The insulating sheet is, for example, a polypropylene sheet. The edges of the metal strip extending perpendicularly to the winding axis E are provided with a metal electrode such that each metal electrode, once the metal strip is wound, constitutes a principal face 110, 120; 210, 220 of the coil 10; 20. The insulating sheet extends outside the coil.
[0040] The coil 10; 20 can thus have a flattened cylindrical shape along at least the flattening direction A.
[0041] The coil 10; 20 has two opposing principal faces 110, 120; 210, 220, elongated along a principal axis P perpendicular to the winding axis E and the flattening direction A (Figures 5, 6, 9, and 10). The two principal faces 110, 120; 210, 220 are connected by a cylindrical surface 170; 270 of the coil. In practice, the coil 10; 20 has a substantially parallelepiped shape. In other words, the cylindrical surface 170; 270 is not a plane of revolution and has several faces separated from each other by rounded edges.
[0042] The principal faces 110, 120; 210, 220 extend substantially perpendicularly lyre to the winding axis E.
[0043] Each capacitor 100; 200 further comprises two electrodes 130, 140; 230, 240, each electrically connected to one of the two opposite main faces 110, 120; 210, 220 of the coil 10; 20. A first electrode 130; 230 is electrically connected to a first 110; 210 of the two main faces and a second electrode 140; 240 is electrically connected to the second 120; 220 main face.
[0044] Each electrode has an electrical connection part 130A, 140A; 230A, 240A connected to the corresponding main face 110, 120; 210, 220 of the coil 10; 20 and an electrical connection part 130B, 140B; 230B, 240B adapted to be electrically connected to one of the bus bars 6, 7 of the continuous bus 1.
[0045] Each electrode 130, 140; 230, 240 further comprises a connecting portion 130C, 230C; 140C, 240C linking the connection portion 130A, 230A; 140A, 240A and the connecting portion 130B, 230B; 140B, 240B. This connecting portion 130C, 230C; 140C, 240C extends beyond the corresponding main face 110, 120; 210, 220 of the coil 10; 20.
[0046] The connecting part 130C, 230C; 140C, 240C extends along an extension direction D1, D2.
[0047] Each electrode 130, 140; 230, 240 is in the form of a folded metal plate to form the electrical connection, linking and electrical fitting parts.
[0048] The electrical connection part 130A, 140A; 230A, 240A of each electrode has a flat shape, adapted to partially or totally cover the main face 110, 120 of the coil 10, 20 to which it is electrically connected, for example by welding.
[0049] The connecting part 130C, 140C; 230C, 240C extends the connection part of each electrode 130, 140; 230, 240, either in the same plane as the electrical connection part, as is the case in the first embodiment of Figures 5 and 6, or in a plane inclined with respect to the plane of the electrical connection part, as is the case in the second embodiment of Figures 9 and 10.
[0050] In the second embodiment shown in figures 7 to 10, the connecting part 130C, 140C; 230C, 240C is connected by an elbow 218, 219 to the electrical connection part 130A, 140A; 230A, 240A and extends substantially perpendicularly to it.
[0051] The connecting portion 130B, 140B; 230B, 240B of each electrode 130, 140; 230, 240 is connected to the linking portion 130C, 140C; 230C, 240C by an elbow 150, 160; 250, 260 which is oriented so that the connecting portion 130B, 140B; 230B 240B presents a free end further from the coil than the elbow 150, 160; 250, 260 along the extension direction Dl, D2 and which allows elastic pivoting of the connecting part 130B, 140B; 230B, 240B around a pivot axis RI, R2 orthogonal to the extension direction Dl, D2.
[0052] The connecting part 130B, 140B; 230B, 240B is in the form of a connecting lug that can pivot elastically around the pivot axis RI, R2 when the omnibus bar 6, 7 is approached to this connecting lug in the direction of the coil.
[0053] Thus the connecting part 130B, 140B; 230B, 240B is movable between a rest position in which it is oriented so that the connecting part 130B, 140B; 230B 240B has a free end further away from the coil than the elbow 150, 160; 250, 260 along the extension direction D1, D2 and a constrained position, in which it is pivoted by the support of the omnibus bar in the direction of the capacitor.
[0054] The electrodes 130, 140; 230, 240 are for example made of copper plate with a thickness between 0.2 and 1.2 millimeters, for example equal to 1 millimeter.
[0055] With the connecting part extending parallel to the winding axis or orthogonally to it, the angle formed between the connecting part 130B, 140B; 230B, 240B and the connecting part 130C, 140C; 230C, 240C of the electrode 130, 140; 230, 240 is here strictly greater than 90°, preferably between 91 and 100 degrees.
[0056] Thus, it is possible to align several capacitors in a row arranged so that all the connecting parts of the capacitors are oriented towards the same side of the row. The orientation of the connecting parts, as well as their elastic pivoting movement, allows for:
[0057] i) to compensate for any differences in the dimensions of the coils of the capacitors in the row according to the extension direction D1, D2 of the connecting parts of the electrodes, to allow the joining parts of all the electrodes to be pressed against the bus bars;
[0058] ii) allow optimal pressing of the omnibus bars 6, 7 against the electrode connection parts when the omnibus bars are applied against the electrode connection parts.
[0059] Thanks to the satisfactory contact between the omnibus bars and the electrode connecting parts, it is then possible to weld the omnibus bars onto the electrode connecting parts by laser welding through transparency.
[0060] In addition, the connecting parts 130B, 140B; 230B, 240B of the two electrodes 130, 140; 230, 240 are positioned on the same side of the coil 10; 20 so as to permit the electrical connection of the two electrodes 130, 140; 230, 240 with the omnibus bars 6, 7 of the continuous bus 1 located on the same side of the coil 10; 20.
[0061] In the first embodiment, each of the metal plates forming the electrodes 130, 140 extends beyond the main face 110, 120 of the coil 10, along the flattening direction A of the coil 10.
[0062] The metal plate extends beyond the main face 110, 120 of the coil, on one side, by said connecting part 130C, 140C, and on the opposite side, by a support part 180, 190 adapted to bear against a support piece receiving said capacitor.
[0063] The connecting parts 130C, 140C of the electrodes 130, 140 extend in the same plane as the electrical connection parts 130A, 140A of the electrode 130, 140. They extend parallel to the main faces 110, 120 of the coil 10. The extension directions D1, D2 of the connecting parts 130C, 140C are parallel to the flattening direction A of the coil 10; 20. They are also orthogonal to the winding axis E, parallel to the main faces 110, 120.
[0064] The connecting portions 130B; 140B of the electrodes 130; 140 extend from the connecting portions 130C, 140C in directions inclined relative to the connecting portion 130C; 140C of the corresponding electrode. The connecting portions 130B; 140B have a rest position in which they are inclined at a non-zero angle Al with respect to a plane passing through the winding axis E and the main axis P of the coil 10.
[0065] The connecting parts 130B, 140B are here oriented towards each other.
[0066] The connecting parts 130B, 140B extend opposite a first part of the side face 170 of reel 10. They partially face each other.
[0067] Alternatively, the connecting parts are completely offset from each other along the main axis P.
[0068] According to another variant, the connecting parts can be oriented in opposite directions, i.e. in opposite directions or be oriented in the same direction.
[0069] Furthermore, each support portion 180, 190 is formed by an edge of the metal plate forming the electrode. It extends the connection portion of each electrode parallel to the main face 110, 120 and protrudes beyond the main face 110, 120 of the coil to which the connection portion 130A; 230A is connected. This support portion 180, 190 projects from the main face 110, 120 in a plane parallel to the main face, parallel to the flattening direction A of the coil. These support portions 180, 190 serve to absorb the force exerted on the capacitor along the flattening direction A during laser welding.
[0070] The two support parts 180, 190 of the electrodes 130, 140 frame a second part of the lateral face 170 opposite to the first part.
[0071] In the continuous bus 1 shown in the figures, six capacitors 100 as described above are aligned side by side to form a row of capacitors. As shown in [Fig. 4], the capacitors 100 in the row are placed side by side so that the first main face 110 of one of the capacitors 100 in the row is aligned with the second main face 120 of the adjacent capacitor 100. The capacitors 100 are aligned here along the winding axis E.
[0072] The connecting parts 130B, 140B of the electrodes of the capacitors 100 all protrude on the same side of the row of capacitors and are aligned.
[0073] Insulating plates 8 separate the adjacent capacitors 100 in pairs. The insulating plate 8 located between two adjacent capacitors 100 extends against the lateral face 170 of one of the two adjacent capacitors in order to isolate the coils of the capacitors 100 from the bus bars 6, 7.
[0074] In the embodiment shown in [Fig.2], the two bus bars 6, 7 are in the form of U-shaped profiles, elongated along the longitudinal direction L of the box 2, which are nested one inside the other and house the row of capacitors 100. The two bus bars 6, 7 are separated by an insulating plate also having a profile shape.
[0075] Each busbar 6, 7 thus has a flat bottom wall 6A, 7A whose dimensions are adapted to those of the capacitor bank, so that the bottom wall 6A, 7A of each busbar 6, 7 can come into contact with the connecting parts of all the capacitors. It is preferably perforated to allow laser welding of the busbars 6, 7 against the connecting parts 130B, 140B; 230B, 240B of the electrodes in a single pass. In other words, it is possible to weld both busbars when they are simultaneously in place against the connecting parts of the two electrodes. Windows in the bottom wall of each busbar 6, 7 ensure that the connecting part of the same positive or negative terminal of each capacitor is in contact with the corresponding busbar and not in contact with the other busbar.The two busbars are separated from each other by an insulating layer. The welding step is thus quick and efficient. Each busbar 6, 7 also has two longitudinal side walls which have, along their free edge, the connection tabs 4 which are folded outwards from the continuous bus and housed in the plurality of slots 2B of the box 2 described previously.
[0076] Finally, one of the longitudinal ends of the bottom wall 6A, 7A of each busbar includes, in this example, a connecting pin 5 which is bent and extends perpendicularly to the bottom wall 6A, 7A of the busbar 6, 7.
[0077] The entire assembly of capacitors 100 and bus bars 6, 7 is further embedded in an insulating resin 3 which fills the box 2. The pins 5 as well as the connection tabs 4 of the bus bars 6, 7 protrude from the insulating resin 3. The resin is for example an epoxy resin.
[0078] In the second embodiment shown in Figures 9 and 10, the extension direction Dl, D2 of the connecting part 230C, 240C of each electrode 230, 240 is parallel to the winding axis E of the coil 20.
[0079] The connecting portions 230C, 240C of the electrodes 230, 240 are connected to the electrical connection portions 230A, 240A of the electrodes 230, 240 by bends 218, 219 (Figures 9 and 10). The connecting portions 230C, 240C extend here perpendicularly to the electrical connection portions 230A, 240A of the electrodes 230, 240. The connecting portions 230C, 240C extend parallel to the lateral face 270 of the coil 20, along its length. In order to minimize the overall size of the capacitor, the connecting portion 230C, 240C extends against the lateral face 270 of the coil 20.
[0080] The connecting parts 230B, 240B of the electrodes 230, 240 have a rest position in which said connecting parts are inclined at a non-zero angle A2 with respect to a plane orthogonal to the winding axis E. This is, for example, the plane of the first part of the lateral face 170.
[0081] The connecting portion 230C of the first electrode 230 extends outward from the first main face 210 to which the electrical connection portion 230A of the corresponding first electrode 230 is connected. Here, it extends beyond the first main face 210 in the direction of the winding axis E.
[0082] The connecting part 230B of the corresponding first electrode 230 is folded opposite the electrical connection part 230A, so that the first electrode 230 has a U-shaped profile, of which the connecting part would be the base and the connecting and joining parts would be the branches.
[0083] The connecting portion 240C of the second electrode 240 extends beyond the second main face 220 to which the electrical connection portion 240A of the second electrode 240 is connected, in the plane of the electrical connection portion ([Fig. 9]). The connecting portion 240C of the second electrode 240 extends towards the first main face 210.
[0084] The connecting part 240B of the second electrode 240 extends from the connecting part 240C. It is oriented opposite to the electrical connection part 240A.
[0085] Thus, the connecting part 240B of the second electrode 240 extends here outwards from the coil 20 (figures 8, 10).
[0086] The connecting parts 230B, 240B of the electrodes 230, 240 extend from the connecting parts 130C, 140C, in parallel directions oriented in opposite directions to each other.
[0087] It is possible to consider that the connecting parts of the two electrodes are oriented in opposite directions, as in the embodiment shown, towards each other, or in the same direction, according to variants not illustrated.
[0088] Preferably, one of the electrodes bypasses the coil here so that the the electrode connection part extends on the side of the main face opposite the main face to which the connection part of this electrode is connected.
[0089] The electrical assembly housed in the box 2 described above may comprise six capacitors 200 according to the second embodiment, aligned side by side to form a row of capacitors. As shown in [Fig. 8], the capacitors 200 in the row are juxtaposed so that the first principal face 110 of each capacitor 200 in the row faces the bottom of the box 2. The first principal faces of the capacitors in the row thus lie in the same plane, within a gap. The second principal faces 220 of the capacitors 200 in the row are oriented towards the opening of the box 2.
[0090] The 200 capacitors in the row are here aligned so that their winding axes E are parallel.
[0091] The lateral faces 270 of the capacitors are juxtaposed here.
[0092] Insulating plates 8 separate the neighboring capacitors 200 in pairs.
[0093] The two omnibus bars 6, 7 are similar to those described with reference to the first embodiment.
[0094] As in the first embodiment, the entire set of capacitors 200 and bus bars 6, 7 is further embedded in an insulating resin 3 which fills the box 2. The pins 5 as well as the connection tabs 4 of the bus bars 6, 7 protrude from the insulating resin 3.
[0095] During the manufacture of the continuous bus 1, six capacitors as described above are provided. The capacitors 100; 200 are made by winding the metal strip and the insulating foil around the winding axis E, then flattening the winding along the flattening direction A. The electrodes 130, 140; 230, 240 are welded to the main faces 110, 120; 210, 220.
[0096] The connecting part 130B, 140B; 230B, 240B of each electrode of the capacitors 100; 200 is pressed against one of the two omnibus bars 6, 7 located on the same side of the coil 100; 200 by elastically rotating each connecting part 130B, 140B; 230B, 240B in the direction of the coil.
[0097] The bus bars 6, 7 are thus pressed one after the other against the connecting portions 130B, 140B; 230B, 240B of the electrodes and then welded by laser welding through the electrode. The welding is carried out quickly because all the connecting portions are located on the same side of the capacitors. It is not necessary to turn the capacitors over to weld the bus bars from one side and then the other.
[0098] In addition, it is possible to press on the connecting parts of the electrodes without risking damage to the coil of the capacitor 100; 200.
[0099] Indeed, in the first embodiment of the capacitor, support portions 180, 190 are provided which bear on the surface of a support piece on which The capacitor is positioned. The coil 10 does not rest directly on the support piece. Thus, when the bus bars 6, 7 bear against the electrode connection parts, the pressure is transmitted to the support parts 180, 190. The coil 10 is not compressed.
[0100] In the second embodiment, the support of the omnibus bars 6, 7 on the connecting parts 230B, 240B of the electrodes 230, 240 is carried out in the direction of the winding axis E. The support is not carried out in the direction of flattening A of the coil, which limits the risks of damage to the coil during this support.
[0101] The DC bus 1 described above can be used to manufacture an inverter. For example, one part of the electrical connections 4 of the busbars 6, 7 is electrically connected to the power modules enabling voltage conversion, and the other part of the electrical connections 4 of the busbars 6, 7 is connected to an input filter of the inverter. The pins 5 are notably connected to a printed circuit board of the inverter, also called a "printed circuit board" (PCB).
[0102] According to one embodiment, a motor vehicle is provided comprising an electric motor and an inverter comprising a DC bus as described above.
[0103] Although the invention has been described in connection with several particular embodiments, it is clear that it is by no means limited to them and that it includes all technical equivalents of the means described as well as combinations thereof if these fall within the scope of the invention. In the claims, any parenthetical reference numeral shall not be construed as a limitation of the claim.
[0104] The use of the verb "include" or "comprise" or "understand" and its conjugated forms does not exclude the presence of other elements or steps than those stated in a claim.
Claims
Demands
1. Capacitor (100; 200) for DC bus (1) of an inverter, comprising: - a coil (10; 20) formed by a metal strip and an insulating sheet wound around a winding axis (E), the coil being flattened along a flattening direction (A) perpendicular to the winding axis (E), so as to present two opposite principal faces (110, 120; 210, 220) elongated along a principal axis (P) perpendicular to the winding axis (E) and to the flattening direction (A), - two electrodes (130, 140; 230, 240), each electrically connected to one of the two opposite main faces (110, 120; 210, 220) of the coil, each electrode comprising an electrical connection portion (130A, 230A; 140A, 240A) connected to the corresponding main face of the coil, an electrical connection portion (130B, 230B; 140B, 240B) adapted for electrical connection to a busbar of the DC bus, and a linking portion (130C, 230C; 140C, 240C) connecting the connection portion (130A, 230A; 140A, 240A) and the linking portion (130B, 230B; 140B, 240B) and extending in a direction extension (D1, D2), projecting from one of the main faces of the coil, the connecting part (130B, 230B; 140B, 240B) of each electrode (130, 140; 230, 240) being connected to the linking part (130C, 230C; 140C, 240C) by an elbow (150, 160) which is oriented so that the connecting part (130B, 230B;140B, 240B) has a free end further from the coil than the bend (150, 160; 250, 260) along the extension direction (D1, D2) and which allows elastic pivoting of the connecting part (130B, 140B; 230B, 240B) about a pivot axis (RI, R2) orthogonal to the extension direction (D1, D2); and the connecting parts (130B, 140B; 230B, 240B) of the two electrodes (130, 140; 230, 240) being positioned on the same side of the coil so as to allow electrical connection of the two electrodes (130, 140; 230, 240) with busbars of the DC bus located on the same side of the coil.
2. Capacitor (100) according to claim 1, wherein the extension direction (D1, D2) of the connecting part (130C, 140C) is parallel to the flattening direction (A) of the coil (10).
3. Capacitor (100) according to claim 2, wherein each of the electrodes (130, 140) comprises a plate having a portion attached against the corresponding main face (110, 120) of the coil (10) and forming the electrical connection part (130A, 140A) of said electrode, the plate extending beyond the main face (110, 120) of the coil (10), along the flattening direction (A) of the coil, on one side, by said connecting part (130C, 140C), and on the opposite side, by a support part (180, 190) adapted to bear against a support piece receiving said capacitor (100).
4. Capacitor (100) according to any one of claims 2 and 3, wherein the connecting parts (130B, 140B) of the electrodes (130, 140) have a rest position in which said connecting parts (130B, 140B) are inclined at a non-zero angle (Al) with respect to a plane (PI) passing through the winding axis (E) and through the main axis (P) of the coil (10).
5. Capacitor (100) according to any one of claims 2 to 4, wherein the connecting parts (130B, 140B) of the two electrodes (130, 140) are oriented towards each other, in the same direction or in opposite directions.
6. Capacitor (200) according to claim 1, wherein the extension direction (D1, D2) of the connecting part (230C, 240C) of each electrode (230, 240) is parallel to the winding axis (E) of the coil (20).
7. Capacitor (200) according to claim 6, wherein the connecting parts (230B, 240B) of the electrodes (230, 240) have a rest position in which said connecting parts (230B, 240B) are inclined at a non-zero angle (A2) with respect to a plane orthogonal to the winding axis (E).
8. Capacitor (200) according to any one of claims 6 and 7, wherein the connecting parts (230B, 240B) of the two electrodes (230, 240) extend opposite one of the main faces (210, 220) of the coil (10, 20) and are oriented towards each other.
9. Capacitor (200) according to any one of claims 6 to 8, wherein at least one of the electrodes (230, 240) has a U-shaped profile, with two branches extending from a base, one of the two branches forming the connecting part (230A, 240A), the other branch forming the connecting part (230B, 240B) and the base forming the linking part (230C, 240C) of the electrode (230, 240).
10. Continuous bus (1) of an inverter, comprising: - at least two capacitors (100; 200) according to any one of the preceding claims, - two bus bars (6, 7), each electrically connected to one of the electrodes (130, 140; 230, 240) of each of the two capacitors (100; 200).
11. Continuous bus (1) of an inverter according to claim 10, wherein each bus bar -6, 7) is welded by a transparent laser weld to one of the electrodes (130, 140; 230, 240) of each of the two capacitors (100, 200).
12. A method for manufacturing a continuous bus (1) for an inverter, wherein: - at least two capacitors (100; 200) according to claim 1 are provided; - the connecting portion (130B, 140B; 230B, 240B) of each electrode (130, 140; 230; 240) of the two capacitors (100; 200) is pressed against one of two bus bars (6, 7) located on the same side of the coil (10; 20) by elastically rotating each connecting portion (130B, 140B; 230B, 240B) towards the coil, - the bus bars (6, 7) are welded by laser transparency welding onto the connecting portions of the electrodes (130, 140; 230, 240).
13. Inverter, comprising a continuous bus according to claim 12.