• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    AC direct current power converter, said converter comprising a power electronic board (54) made on an insulated metal substrate (11) comprising: - a backside metal carrier of said insulated metal substrate (11), and - a insulating layer covering the metal support, forming front face of said insulated metal substrate (11), wherein at least one component (30) is mounted on the rear face of the insulated metal substrate (11).
    公开号:FR3024011A1
    申请号:FR1456793
    申请日:2014-07-15
    公开日:2016-01-22
    发明作者:Fabien Guerin；Thierry Canciani；Johnny Duarte
    申请人:Valeo Equipements Electriques Moteur SAS；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a device for feeding an electric supercharger. Ecological considerations, including the fight against global warming by reducing CO2 emissions, have led OEMs to offer automobile manufacturers electric superchargers that improve the dynamic response of low-displacement, low-displacement internal combustion engines. diet. Unlike conventional superchargers driven by exhaust gases, the electric supercharger, ie powered by an electric motor, has an instantaneous response time, and improves engine torque at low speeds. and acceleration. This system considerably reduces the engine capacity of the combustion engines, thus reducing fuel consumption. In the case of a diesel engine, the lag time of a gas supercharger is also responsible for the emission of particles when, in a phase of acceleration at low speeds, the injection system tries to provide the requested power by injecting a surplus of fuel. To overcome this drawback, the company VALEO SYSTEMES DE CONTROLE MOTEUR proposes in its international patent application WO 2013/045821 the implementation of an electric supercharger compressor to assist the gas turbocharger at the moment of depression of the pedal. 'accelerator. Given the power levels required, the converters used in these applications are no longer designed as modules integrating electronic components on epoxy printed circuits (type FR4), but use the technology of insulated metal substrates (SMI ) which allows better heat dissipation of the power components. The elements of electrical energy storage - chokes or capacitors - used in power converters are so-called "through" components. Like the connectors, these through components are difficult to weld on a process insulated metal substrate and can not be integrated on an insulated metal substrate such as on an epoxy printed circuit board, as this would lead to risks of short circuit.
    [0002] These inductors and / or capacitors of the power converters known from the state of technology are therefore placed next to the insulated metal substrate and connected to the tracks thereof by connection traces (formed in die-cut copper sheet) overmolded. in an intermediate room. However, in some embodiments of such a system, the area allocated for the electronics is limited in a defined diameter. Placing the power components on the side of the board becomes difficult. The present invention aims to overcome the disadvantages mentioned above, in particular by providing a power supply device for an electric supercharger.
    [0003] To this end, the subject of the present invention is an AC direct current power converter, said converter comprising an electronic power card made on an insulated metal substrate comprising: a metal support forming a rear face of said isolated metal substrate, and an insulating layer covering the metal support, forming a front face of said insulated metal substrate, in which at least one component is mounted on the rear face of the insulated metal substrate. Advantageously, the arrangement of the power converter according to the invention makes it possible to overcome the problem of placing components on a limited surface, when the routing of the electronic card restricts the possible locations, thus leaving a greater freedom of placement. This also allows the placement of components under the insulated metal substrate and soldering them on said insulated metal substrate without risk of short circuit. The power supply device of an electric supercharger according to the invention may also comprise one or more of the following characteristics, considered individually or in any technically possible combination: the isolated metal substrate comprises electrical connection, said tracks being disposed on the insulating layer of said insulated metal substrate and connecting electronic components disposed on the front face of the insulated metal substrate; and / or the component is electrically connected to at least one of the electrical connection tracks; and / or - the component comprises plugs, said plugs pass through the insulated metal substrate via a hole opening into said insulated metal substrate; and / or - the at least one component mounted on the rear face of the insulated metal substrate is soldered to at least one electrical connection track by means of an intermediate piece placed on the front face of said insulated metal substrate and making it possible to interface between said at least one electrical connection track and a plug of the at least one component; and / or the intermediate piece is an assembly of two sets of electrical connection bars separated by a plastic part; and / or - the material of the plastic part is chosen so that the plastic part withstands refusing furnace temperatures; and / or - the end of at least one bar is fork-shaped to accommodate the plugs of the component; and / or the intermediate piece is a welding cap engaged by an opening on at least one of the plugs of the at least one component; and / or - said welding cap is of substantially parallelepiped shape; and / or - said solder cap has a lower portion having a flange extending in the plane of said insulated metal substrate; and / or - said welding cap comprises a wall having at least one fold; and / or - the electrical connection tracks are copper tracks.
    [0004] The invention also relates to an electric supercharger comprising an AC direct current power converter according to the invention. The invention will be better understood in the light of the following description which is given for information only and which is not intended to limit said invention, accompanied by the figures below: FIG. 1 is a view exploded by an electric supercharger according to the invention; FIG. 2 illustrates the difficulty of soldering a through-type electronic element to an insulated metal substrate by a conventional welding process; FIG. 3 represents a method for connecting the capacitances by block deporting according to a device of the prior art; FIG. 4 represents an embodiment of an intermediate part making it possible to interface the routing of the insulated metal substrate with a through component, - Figure 5 shows the contact between the forks of an intermediate part and the plugs of a through component, - Figure 6 shows a partial sectional view of a compres Figure 7 shows a top view of the power supply device of an electric supercharger, - Figure 8 shows in perspective a solder cap of the type used to weld the electronic elements of type "through" FIG. 9a shows a variant of the welding cap shown in FIG. 8; FIG. 9b shows the blank used to fold the solder cap as shown in FIG. 9a; FIG. 10a illustrates the process Figure 10b illustrates the welding process using the welding cap shown in Figure 9a. An example of a supercharger compressor 100 of a motor vehicle for a supercharging system of a heat engine is shown in FIG.
    [0005] As represented in FIG. 1, the supercharging compressor 100 comprises a rotating electrical machine 200 and a turbine 300 coupled to said rotary electrical machine 200. As illustrated in FIG. 1, the rotating electrical machine 200 comprises an electric motor 52 whose phases are connected, for example via a connection device 240 to an electrical power card 54. All of these elements can be disposed inside a housing 50 closed by a cover 270. - 5 - As it already has has been indicated in the preamble, it is not possible to weld electronic elements whose plugs pass through an insulated metal substrate directly on the same way as on a FR4 type epoxy printed circuit board. Figure 2 shows the plug 44 of a through component placed on the rear face of an insulated metal substrate 11 welded to the front face. Generally, the insulated metal substrate 11 is composed of three or more layers: the upper layer 41 is copper, the intermediate layer 42 is an insulator and the lower layer 43 is aluminum. The through hole 46 provided to let the plug 44 to be welded in an insulated metal substrate 11 must be wider to prevent the plug 44 from coming into contact with the aluminum layer 43 at the base of the insulated metal substrate 11. However , even if contact between the plug 44 and the aluminum layer 43 is avoided, a conventional solder 45 could migrate by capillarity of the copper layer 41 to the aluminum layer 43, thus creating a short circuit . It is therefore necessary to deport the weld for "through" type components.
    [0006] FIG. 3 presents a method for interfacing the insulated metal substrate 11 and the capacitor (s) 30 according to a device of the prior art, in which the capacitance (s) 30 are deported in one block. In the case where the routing of the insulated metal substrate 11 and the bulk does not allow to place the capacitors 30 directly above, one method is to deport the components to place them outside the power card 54. The design such a piece requires that the positive and negative busbars 14a, 14b are parallelized over the longest possible distance, to meet the constraints of electromagnetic compatibility and filtering. However, shifting the capacitances implies that the busbars 14a, 14b are longer to connect the track of the insulated metal substrate 11 to the relevant components. The constraints of parallelization cause an overcharge due to the increase of material (copper) necessary for the realization of the busbars 14a, 14b, as well as an additional heating from the self-heating of the busbars 14a, 14b. This is why the device of the invention relates to an intermediate piece 10 for electrically connecting the capacitors 30 placed on the rear face of the insulated metal substrate 11, and whose plugs of said capacitors 30 pass through said insulated metal substrate 11 by the intermediate through holes. This intermediate piece 10 therefore aims to reduce (or eliminate) the constraints and disadvantages mentioned above. FIG. 4 shows an intermediate piece 10 according to the invention making it possible to interface the routing of the insulated metal substrate 11 with a capacitor 30. The intermediate piece 10 is composed of two sets of bars 14a, 14b (FIG. one positive, the other negative) assembled around a plastic part 12. These busbars 14a, 14b can be fixed to the plastic part 12 by snap-fastening for example, or be directly overmolded in the plastic part 12. plastic part 12 may comprise one or more indexing pins 18a, 18b, oriented downwards from the intermediate part 10 and will join corresponding holes on the insulated metal substrate 11. At one end of the busbars 14a, 14b are flat areas 16a, 16b allowing contact with the insulated metal substrate 11. These flat areas 16a and 16b can form support zones which, depending on the thickness, allow to elevate the intermediate piece The raising of the intermediate piece 10 makes it possible to make the electrical contacts at a controlled distance from the plane of the insulated metal substrate 11. The risks of short-circuiting with the substrate are thus avoided, and the ends of the intermediate piece are more accessible.
    [0007] The intermediate piece 10 is thus deposited on the insulated metal substrate 11 during the so-called rejection process like any other surface-mounted component, thus making it possible to make the electrical connection between the intermediate piece 10 and the insulated metal substrate 11. The other end busbars 14a, 14b is fork-shaped 20a, 20b, to provide the electrical connection with the corresponding plug of the capacitor 30. This electrical connection can be done by electrical crimping, or by welding, but is not limited to to a unique mode of realization. FIG. 5 shows the forks 20a, 20b of the intermediate part 10 interacting with the plugs 32a, 32b of the capacitor 30. The shape of the plugs 32a, 32b of a capacitor 30 may be different from that shown in FIG. connection between the plugs 32a, 32b of the capacitor 30 and the forks 20a, 20b of the intermediate part 10 can be made by electrical crimping, or by welding, and is not limited to a single embodiment. The structure of the assembly of the electric supercharger 100 and its housing 50 are adapted to allow the positioning of the capacitors 30 on the rear face of the insulated metal substrate 11 and above the electric motor 52 without impacting the length and the total width of the the assembly, as shown in Figure 6. In this sectional diagram of the lower assembly of the electric supercharger, the intermediate part 10 deposited on the insulated metal substrate 11 is in contact with the pins 32a, 32b of a The flat areas 16a, 16b at the end of the busbars 14a, 14b are in contact with the insulated metal substrate 11 allow the capacitances 30 to be electrically connected to the routing of the insulated metal substrate 11. A view of above the electrical power card 54 in Figure 7 shows the capabilities 30 interacting with the intermediate parts 10 on the metal substrate iso 11. The top view makes it possible to take account of the slight lateral overshoot of the capacitances 30 with respect to the diameter of the insulated metal substrate 11. However, in the invention as presented, the area allocated for the electrical power card 54 is a disc of diameter 110mm. The rear-facing placement of the capacitors 30 makes it possible to respond to this constraint. FIG. 8 shows an intermediate piece 10 according to one embodiment, when the copper strip passes close, more particularly around, the through hole 46 of the insulated metal substrate 11. This intermediate piece 10 according to one embodiment of the invention takes the form of a welding cap 70, thus making it possible to interface the insulated metal substrate 11 with the capacity 30 to be welded. As shown in FIG. 8, the welding cap 70 has a parallelepipedal shape. It comprises an upper face 75 having an opening 76 for receiving a connecting element, such as a plug, and four adjacent walls 77 whose lower edges 78 are intended to be welded on the track 41 of the insulated metal substrate 11 as the schematically shows Figure 10a. The solder cap 70 is welded to the insulated metal substrate 11 in the same manner as a CMS type electronic component, i.e. it is deposited on the insulated metal substrate 11, provided with solder paste after serigraphy, by a machine of the "pick'n place" type, and that it is then passed through an oven of refusals to form a solder between the lower edges and the track. Specific shapes are defined to facilitate brazing of the solder cap 70 to the insulated metal substrate 11, such as an addition of a flange 80 on a lower portion of the solder cap 70, as shown in FIG. 9a, in order to increase the wet surface by the solder as shown in Figure 10b.
    [0008] Areas of flexibility, formed by at least one fold in the walls, also advantageously allow differential expansion of the connection elements of the capacitance. A weld cap 70, of simple general shape, parallelepipedal or cubic, is easily made by folding a blank, obtained by punching a metal sheet, such as that shown schematically in Figure 9b. In this way, the flange and the zones of flexibility are also easily realized.
    [0009] Since the solder caps 70 have been welded to the insulated metal substrate 11 facing through holes 44 made in the insulated metal substrate 11 at the locations intended to receive the capacitors 30, these capacitors 30 are put in place under the insulated metal substrate 11. engaging their plugs 32 in these through holes 46, and in the opening 76 of the welding caps 70.
    [0010] As shown in FIGS. 10a and 10b, the width of these through holes 46 is much greater than the diameter of the connecting pin to avoid any risk of a short circuit between the connection plug and the insulated metal substrate 11. is not limited to the particular embodiments that have been described above, many variants can be designed without departing from the scope defined by the appended claims.
    权利要求:
    Claims (14)
    [0001]
    REVENDICATIONS1. AC direct current power converter, said converter comprising a power electronic board (54) made on an insulated metal substrate (11) comprising: - a backside metal carrier of said insulated metal substrate (11), and - a insulating layer covering the metal support, forming front face of said insulated metal substrate (11), wherein at least one component (30) is mounted on the rear face of the insulated metal substrate (11).
    [0002]
    The converter according to claim 1, wherein the insulated metal substrate (11) comprises electrical connection tracks, said tracks being disposed on the insulating layer of said insulated metal substrate (11) and connect electronic components disposed on the face before isolated metal substrate (11).
    [0003]
    3. Converter according to one of claims 1 or 2, wherein the component (30) is electrically connected to at least one of the electrical connection tracks.
    [0004]
    The converter according to one of the preceding claims, wherein the component (30) comprises plugs, said plugs pass through the insulated metal substrate (11) through a through-hole (46) in said insulated metal substrate (11). .
    [0005]
    5. Converter according to the preceding claims, wherein the at least one component (30) mounted on the rear face of the insulated metal substrate (11) is welded to at least one electrical connection track by means of an intermediate piece (10). placed on the front face of said insulated metal substrate (11) and making it possible to interface said at least one electrical connection track with a plug of the at least one component (30).
    [0006]
    Converter according to claim 5, wherein the intermediate piece (10) is an assembly of two sets of electrical connection bars (14a, 14b) separated by a plastic part (12).
    [0007]
    Converter according to claim 6, wherein the material of the plastic part (12) is chosen such that the plastic part (12) withstands refusal oven temperatures.
    [0008]
    8. Converter according to claim 6 or 7, wherein the end of at least one bar is forked to receive the plugs (32a, 32b) of the component (30).
    [0009]
    The converter according to claims 4 and 5, wherein the intermediate piece (10) is a solder cap (70) engaged by an opening (76) on at least one of the plugs (32) of at least one component (30). ).
    [0010]
    The converter of claim 9, wherein said solder cap (70) is substantially parallelepiped shaped. 15
    [0011]
    The converter according to claim 9 or 10, wherein said solder cap (70) has a lower portion (78) having a flange (80) extending in the plane of said insulated metal substrate (11).
    [0012]
    12. Converter according to one of claims 9 to 11, wherein said solder cap (70) has a wall (77) having at least one fold (81).
    [0013]
    Converter according to claim 2 and one of claims 3 to 12, wherein the electrical connection tracks are copper tracks. 25
    [0014]
    14. An electric supercharger (70) comprising an AC direct current power converter as described in the preceding claims.
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    同族专利:
    公开号 | 公开日
    WO2016009133A1|2016-01-21|
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    FR3024011B1|2018-04-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    FR3050878B1|2016-04-28|2019-11-22|Valeo Systemes De Controle Moteur|ELECTRICAL CONNECTION BAR FOR EXCHANGING ELECTRICAL ENERGY BETWEEN AN ELECTRICAL EQUIPMENT AND AN ELECTRICITY NETWORK|
    DE112017005709T5|2016-11-14|2019-08-08|Ihi Corporation|ELECTRICAL COMPRESSOR|
    EP3613972B1|2018-08-21|2021-07-07|Vitesco Technologies GmbH|Drive unit for an actuator|
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    法律状态:
    2015-07-31| PLFP| Fee payment|Year of fee payment: 2 |
    2016-01-22| PLSC| Publication of the preliminary search report|Effective date: 20160122 |
    2016-07-29| PLFP| Fee payment|Year of fee payment: 3 |
    2017-07-31| PLFP| Fee payment|Year of fee payment: 4 |
    2018-07-27| PLFP| Fee payment|Year of fee payment: 5 |
    2019-07-31| PLFP| Fee payment|Year of fee payment: 6 |
    2020-07-31| PLFP| Fee payment|Year of fee payment: 7 |
    2021-07-29| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1456793A|FR3024011B1|2014-07-15|2014-07-15|CONVERTER OF CURRENT POWER CONTINUOUS IN ALTERNATING CURRENT|FR1456793A| FR3024011B1|2014-07-15|2014-07-15|CONVERTER OF CURRENT POWER CONTINUOUS IN ALTERNATING CURRENT|
    EP15759500.0A| EP3170375B1|2014-07-15|2015-07-09|Dc/ac power converter|
    EP15759501.8A| EP3170376A1|2014-07-15|2015-07-09|Electric supercharging compressor|
    PCT/FR2015/051898| WO2016009133A1|2014-07-15|2015-07-09|Dc/ac power converter|
    PCT/FR2015/051899| WO2016009134A1|2014-07-15|2015-07-09|Electric supercharging compressor|
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