专利摘要:
The invention relates to an electronic power module (10), in particular intended to be integrated in a voltage converter, the power electronic module (10) comprising a planar substrate (12) comprising at least one trace of power overmolded at least in part of electrically insulating material, and an upper face for receiving at least one electronic component (14) so as to be electrically connected to the at least one trace of power.
公开号:FR3044859A1
申请号:FR1561739
申请日:2015-12-02
公开日:2017-06-09
发明作者:Guillaume Tramet;Arnaud Mas;Ernesto Sacco
申请人:Valeo Systemes de Controle Moteur SAS;
IPC主号:
专利说明:

The invention relates to an electronic power module, in particular intended to be integrated in a voltage converter and an assembly of such an electronic module. power and electronic power module support. The invention also relates to an electronic architecture comprising such an assembly and a voltage converter intended to be integrated in an electric machine. Another object of the invention relates to an electric machine comprising such a voltage converter.
Usually, an electronic power module, intended to power an electrical machine, requires a housing for electrical isolation of the electronic module and the electrical connection of the electronic power module to electrical elements of the electric machine. Such electronic modules generally require specific production lines, and therefore have high production costs.
The present invention aims to remedy these drawbacks by proposing a compact electronic power module and manufactured on standard manufacturing lines, such as the production lines used for the production of electronic modules in "DBC" technology (from the English Direct For this purpose, the subject of the invention is an electronic power module, in particular intended to be integrated in a voltage converter, said voltage converter being in particular intended to be integrated into an electrical machine, the electronic power module comprising a planar substrate comprising at least one power trace overmolded at least in part of electrically insulating material, and an upper face for receiving at least one electronic component so as to be electrically connected to the at least one trace of power.
Advantageously, the electronic power module according to the invention can be manufactured on standard production lines, using methods such as screen printing, the deposition of surface components ("CMS"), or reflow, used for the production of electronic modules in "DBC" technology, which reduces the production costs of such an electronic module. In addition, such an electronic power module allows a simplification of assembly and manufacturing processes.
The electronic power module according to the invention may also comprise one or more of the following characteristics, taken individually or according to all the possible combinations: the flat substrate does not have side walls extending from the plane substrate substantially perpendicular to the upper face; plane substrate; the planar substrate comprises an upper part comprising the at least one trace of power and a lower part comprising at least one open cavity, the bottom of the open cavity being formed at least in part by at least a portion of the at least one trace of power ; the lower part and the upper part of the plane substrate are formed in continuity of material. The invention also relates to a set of an electronic power module and an electronic power module support, in particular intended to be integrated in a voltage converter, comprising: an electronic power module according to the invention , the electronic module comprising a lower part comprising at least one open cavity; and - a power electronic module support comprising a receiving cavity of the power electronic module, the receiving cavity comprising a bottom from which extends substantially perpendicular to at least one protrusion of the support; and wherein the or each open cavity of the power electronics module is for receiving at least one protuberance.
Advantageously, the assembly according to the invention allows an efficient heat dissipation of the heat generated by the electronic power module, and therefore reduces the wear of the components of the electronic power module. The assembly according to the invention may also comprise one or more of the following characteristics, considered individually or according to all the possible combinations: the bottom of the or each open cavity of the electronic module is formed at least in part by at least a portion of the at least one trace of power; the electronic power module is mechanically supported by the at least one protuberance; - The receiving cavity is intended to receive an insulating material, so that the power electronic module is embedded in the insulating material. The subject of the invention is also an electronic architecture, in particular intended to be integrated in a voltage converter, comprising a plurality of electronic power modules and a support common to the power electronic modules so that each electronic power module and the support form an assembly according to the invention.
Advantageously, the electronic architecture according to the invention allows an effective thermal dissipation of the heat generated by the plurality of power electronic modules, and thus an increase in the service life of the components of the electronic power modules.
In addition, a plurality of electronic power modules associated with a common support allows a reduction of costs and production time. The invention also relates to a voltage converter in particular for powering an electrical machine, comprising at least one electronic architecture according to the invention or an assembly according to the invention.
According to one embodiment of the invention, the voltage converter may comprise a heat sink forming the support of the electronic power module or modules. The invention also relates to an electric machine for a motor vehicle comprising at least one voltage converter according to the invention integrated with said electrical machine. For example, the electric machine is a starter, an alternator-starter or another electrical machine embedded in the vehicle. Other features and advantages of the present invention will appear on reading the description and the following figures: FIG. 1 represents a view of an upper face of a planar substrate of an electronic power module according to an embodiment of the invention, FIG. 2 shows a view of a lower face of the planar substrate of the power electronic module of FIG. 1 according to one embodiment of the invention, FIG. 3 represents an exploded view according to an embodiment of a set of an electronic power module and an electronic module support according to the invention, FIG. 4 represents a sectional view of an assembly of an electronic power module and a module support According to one embodiment of the invention, FIG. 5 is an exploded view according to one embodiment of a voltage converter according to the invention, and FIG. is a sectional view according to an embodiment of an assembled voltage converter of Figure 4 according to the invention.
It should be noted that these drawings have no other purpose than to illustrate the text of the description and do not constitute in any way a limitation of the scope of the invention.
In the various figures, the analogous elements are designated by identical references. The invention relates to an electronic power module, in particular intended to be integrated in a voltage converter. The voltage converter is particularly intended to transmit an electric current from a source of electrical energy to the electrical machine in which it is integrated. In particular, FIGS. 1 and 2 respectively represent an upper face 20 and a lower face 24 of a planar substrate 12 of an electronic power module 10 according to the invention.
The power electronic module 10 comprises a planar substrate 12, the planar substrate 12 comprising at least one trace of power overmolded at least in part of electrically insulating material, preferably of plastic material. In particular, in FIG. 1, the planar substrate 12 of the power electronic module comprises three power traces 16a, 16b, 16c overmolded at least in part of electrically insulating material. A trace of power is an electrically conductive trace, in particular a metallic trace, for example a copper track. A power trace is in particular configured to withstand an electric current for circulation in the electric machine.
Each trace of power 16a, 16b, 16c comprises at least one portion devoid of over-molding, in particular intended to be electrically connected to electrical elements external to the electronic power module 10 as specified below. The thickness of the planar substrate 12 may for example be between 0.5 mm and 5 mm, and depends, in general, on the thickness of the power traces. For example, the thickness of the power traces may be between 600 microns and 2000 microns.
Preferably, the planar substrate 12 is devoid of lateral walls extending from the planar substrate 12 and in particular from the upper face 20 of the planar substrate 12. Advantageously, this allows simultaneous isolation of a plurality of electronic modules arranged on a support common, but also a simplification of the manufacturing process, in particular for reflow, and a saving of space within the voltage converter.
According to a preferred embodiment, the planar substrate 12 comprises an upper portion 70 and a lower portion 72, advantageously formed in continuity of material. In particular, the upper part 70, in particular visible in FIG. 1, comprises at least one trace of power, and the lower part 72, notably visible in FIG. 2, comprises at least one open cavity 22. The bottom of the open cavity 22 is preferably formed at least in part by at least a portion of a power trace. The overmolding 18 of the power tracks 16a, 16b, 16c at least partly forms the edge of the open cavities 22. In particular, as shown in FIG. 2, the electronic power module 10 comprises two open cavities 22. The open cavities allow including heat dissipation, and will be detailed later.
As shown in FIG. 3, the power electronic module 10 comprises at least one electronic component 14, arranged on the upper face 20 of the planar substrate 12, so as to be electrically connected to one of the power traces.
The power electronic module 10 may also comprise at least one external connection element 26, disposed on the same face of the planar substrate 12 as the electronic component 14. The external connection element 26 may comprise a tongue of conductive material folded into shape of "Z" so as to include at least one lower planar face in contact with the planar substrate 12 and an upper planar face for electrically connecting a trace of power to at least one electrical element external to the electronic power module 10. For example an outer connecting member 26 may be adapted to electrically connect the first power trace 16a to a phase (φ) of the electrical machine, or the second power trace 16b to a positive polarity pole (B +) of a source. of electrical energy, or the third trace of power 16c to a pole of negative polarity (B-) or to the mass of a no source of electrical energy.
Preferably, the mounting of the external connection elements 26 and the electronic components 14 on the planar substrate 12 is obtained by deposition of solder paste and then by the arrangement of the electronic components 14 and the external connection elements 26 at the surface of the planar substrate 12 of the electronic power module ("CMS"). The electrically insulating material of the planar substrate 12 of the electronic module 10 is advantageously made of high temperature plastic material, so as not to be altered during the passage of the electronic module 10 in the oven for the reflow of the components. Such a method of manufacturing the electronic modules makes it possible to reduce the number of connections between the components of the electronic module 10, in particular the electronic components 14 and the external connection elements 26, and thus to simplify the method of manufacturing and assembling the modules. e. In addition, the mounting of the electronic components 14 and the external connection elements 26 directly on the planar substrate allows space saving within the voltage converter.
In particular, the electronic components 14 and / or the external connection elements 26 are mounted on a power trace 16a, 16b, 16c. In particular, an electrical contact is made with the power trace 16a, 16b, 16c by the face of the electronic component 14 or the connection element 26 which is in contact with the power trace 16a, 16b, 16c. In addition, the electronic component 14 may be in electrical contact with other electronic components 14, or another trace of power than that on which it is mounted, in particular by connection wires (also called "bonding" in English).
The electronic power module as described above is intended to be received by a support 28 of electronic module. In particular, an assembly 30 of an electronic power module 10 and an electronic module support 28 according to the invention is shown in FIGS. 3 and 4. The assembly 30 is particularly intended to be integrated in a converter of voltage.
The power electronic module support 28 comprises a receiving cavity 32 of the power electronic module 10. In particular, as illustrated in FIG. 3, the power module support 28 comprises three receiving cavities 32, each receiving cavity 32 being intended to receive an electronic power module 10.
The support 28 allows thermal and electrical conduction, especially for the recovery of the mass and the dissipation of heat. The receiving cavity comprises a bottom 34 from which extends substantially perpendicularly at least one protrusion 36 of the support 28. The or each open cavity 22 of the power electronic module 10 is intended to receive at least one protuberance 36.
The or each protrusion 36 is intended to be covered with a thermally conductive material C and electrically insulating, in particular visible in Figure 4. For example, the thermally conductive material C is advantageously a thermal grease.
The bottom of each open cavity 22 of the electronic module 10 is formed at least in part by a portion of a power trace. For example, as illustrated in FIG. 4, the bottom of each open cavity 22 is formed by two portions of traces of power 16b, 16c and by a portion of overmoulding. Of course, the bottom of the open cavities 22 may be formed by a single or a plurality of traces of power or portions of power traces. In addition, the bottom of each cavity 22 is in contact with the or each protrusion 36. In particular, as can be seen in FIG. 4, the power electronic module 10 is mechanically supported by the at least one protrusion 36. In other words, the electronic power module 10 is intended to be supported on the protuberances 36 of the support 28. A space between the power electronic module 10 and the bottom 34 of the receiving cavity 30 of the support 28, visible in FIG. for the electrical and thermal insulation of the electronic power module 10.
Advantageously, the receiving cavity 32 of the support 28 is intended to be filled with an insulating material A, in particular visible in FIG. 4, so that the power electronic module 10 is embedded in the insulating material A. The insulating material can be an insulating gel, for example a silicone gel, or an insulating resin, for example an epoxy resin.
In particular, this configuration allows efficient isolation of the electronic modules 10. Advantageously, the power module support 28 is a heat sink, also called heat sink. The power modules 10 are attached to the heat sink to allow heat transfer between the power modules 10 and a cooling circuit (not shown), in order to dissipate the heat generated by the electronic modules 10.
Preferably, as illustrated in FIG. 4, one end of the external connection element 26 intended to electrically connect a power trace to at least one electrical element external to the electronic power module 10 protrudes from the layer of insulating material A covering the electronic component 14.
Advantageously, the electronic component 14 is covered with a layer of insulating material A. In particular, the layer of insulating material covering the electronic component 14 has a thickness greater than at least 1 mm at one end of the opposite electronic component 14 at one end of the electronic component 14 in contact with the planar substrate 12.
In addition, the receiving cavity 32 of the electronic modules 10 may comprise positioning elements (not shown) for positioning the electronic modules 10 on the support 28 in a predetermined position. These positioning elements make it possible to facilitate and guarantee a correct and rapid positioning of the electronic modules 10 on the support 28.
A plurality of electronic power modules 10 and a support 28 common to the power electronic modules 10 as described above are in particular intended to be integrated in a voltage converter.
In particular, FIG. 5 represents an exploded view of such a voltage converter 38 intended to be integrated in an electrical machine, comprising an electronic architecture, that is to say electronic power modules 10, in this example the number of three, and a support 28 of the electronic modules as described above. The voltage converter 38 preferably comprises a heat sink forming the support of the power electronic modules.
The voltage converter 38 may also comprise an electrical connector 40, an electronic control card 42, and a support 44 of the electronic card.
Advantageously, the voltage converter 38 is an AC-DC converter. Preferably, the voltage converter 38 is integrated in the housing of the electric machine, in particular by positioning the support 28 on one end of the housing of the electric machine.
The control electronic card 42 is in particular intended to control the power electronic modules 10. In particular, the electronic card 42 is intended to be electrically connected with the power electronic modules 10 via at least one electrical connection element 46.
The electrical connector 40 is arranged between the support 28 of the electronic power modules and the support 44 of the electronic card. The electrical connector 40 is configured to electrically connect the electronic modules 10 to at least one of the electrical elements (phase φ) of the electrical machine and / or to at least one of the electrical elements (B +, B ') of a power source. electric energy. The electrical elements of the electrical machine are, for example, phases φ. The electrical elements of the electrical energy source are for example a positive DC terminal B +, a negative DC terminal B 'or ground. There is preferably an electronic module of power 10 per phase φ. In addition, as shown in FIG. 5, the electrical connector 40 comprises orifices 48 arranged to allow the access of the electrical connection elements 46 of the electronic modules 10 to the electronic control card 42.
The support 44 of the electronic control board is arranged between the electronic power modules 10 and the electronic control board 42. The support 44 of the electronic control board is preferably made of insulating material, for example molded plastic material. The support 44 comprises an open cavity 50 having a bottom on which the electronic card 42 is intended to be received.
The support 44 also comprises at least one hollow column 52 in which the at least one electrical connection element 46 of the electronic card 42 with the electronic modules 10 is intended to be inserted. The hollow column 52, in particular visible in FIG. 6, extends from the open cavity 50 and is configured to communicate with the open cavity 50 at a first end 54 of the hollow column 52. In particular, the support 44 of the card electronics may comprise a plurality of hollow columns, each hollow column being intended to receive the electrical connection elements 46 of each electronic module 10 with the electronic control board 42. The open cavity 50 is intended to be filled with an insulating material of so that the electronic control card 42 is embedded in the insulating material. For example, as shown in FIG. 6, the electronic card is embedded in an insulating material B. The electronic control card 42 is thus effectively isolated.
Advantageously, the support 44 of control electronic card may comprise a filling element 56 of the hollow column 32. The filling element 56, also called filling channel, may have a general shape of ramp, preferably a helical shape.
The electronic control board 42 may advantageously comprise an orifice 58 arranged opposite the end of the channel 56 communicating with the bottom of the open cavity 50. The orifice 58 of the electronic card 42 allows the filling of the hollow column 52 of insulating material B via the channel 56.
One end of the filling member 58 communicates with the bottom of the open cavity 50 and another end of the filling member 58 communicates with a side wall of the hollow column 52. Preferably, a second end 60 of the column hollow 52 is in contact with the insulating material in which the electronic module 10 is embedded. This configuration makes it possible to guarantee the filling of the hollow column 52 of insulating material, and thus to ensure effective insulation of the electrical connection elements 46.
Preferably, as illustrated in FIG. 6, a second end 60 of the hollow column 52 is in contact with the insulating material A in which the electronic module 10 is embedded. This configuration makes it possible to guarantee the filling of the hollow column 52 of insulating material B, and thus to ensure an effective insulation against dust, liquids, gases or even the humidity of the electrical connection elements 46. The insulating material thus eliminates any risk of possible short circuit at the interconnection of the electronic card 42 with the power electronic modules 10.
In particular, the electronic control board 42 and the electronic power modules 10 may be insulated with identical or different insulating materials A, B, preferably an identical insulating material, in particular an insulating gel. The interface between the insulating material A of the electronic power module 10 and the insulating material B of the electronic control board 42 is located in particular inside the hollow column 52, near the second end 60 of the hollow column. 52.
In addition, the space between the electronic card 42 and the power module 10 and surrounding the hollow column 52 is devoid of material, in particular of insulating material. The free space of material, in particular of insulating material, has, inter alia, the effect of leaving a free space for the circulation of air, thus allowing a convection cooling. In addition, this configuration makes it possible to reduce the production costs of the voltage converter 36, thanks in particular to a gain in insulating material. This material free space at least partially receives the electrical connector 40.
In addition, the bottom of the open cavity 50 preferably comprises positioning elements 62 for positioning the electronic card 42 on the support 44 in a predetermined position. In other words, the positioning elements 62 arranged on the support 44 of the electronic card are intended to cooperate with complementary positioning elements 64 of the electronic card 42. For example, in Figure 5, six positioning elements 62 are shown, each comprising a lug protruding from the bottom of the open cavity 50, perpendicular to the bottom. The positioning elements 62 may be of cylindrical shape as shown in FIG. 5. The six complementary positioning elements 64 of the electronic card are positioning orifices preferably having a section of shape and dimensions complementary to the shape and the dimensions. positioning elements 62. For example, as shown in FIG. 5, the complementary positioning elements 64 have a circular section. These positioning elements 62 make it possible to correctly and quickly position the electronic card 42 on the support 44, and thus to allow an efficient electrical connection of the electronic card 42 with the power electronic modules 10.
In addition, the bottom of the open cavity 50 advantageously comprises guide elements 66 of the at least one electrical connection element 46 arranged at the first end 54 of the hollow column 52 and intended to guide the at least one electrical connection element 46. to the electronic card 42. For example, in FIG. 5, the bottom of the open cavity 50 comprises three groups of guide elements 66. The guide elements 66 comprise guide orifices 68, advantageously a guide orifice 68 via electrical connection element 46. The guide orifices 68 make it possible to recenter the electrical connection elements 46 for the electrical connection of the electronic module 10 with the electronic card 42 and thus to correctly connect the electronic module 10 with the electronic card 42. Preferably, in order to allow a better refocusing of the electrical connection elements 46, the section of the orifices of guidance 68 facing the electronic module 10 is larger than the section of the guide holes 68 opposite the electronic card 42. For example, in Figure 6, the two guide elements 66 have a circular section and include a frustoconical portion followed by a cylindrical portion.
The electronic power module has been described in the context of a voltage converter intended to be integrated into an electric machine that it supplies. The electric machine is in particular intended to be embedded in a motor vehicle to allow a start of a vehicle engine and / or produce electrical energy from the engine of the vehicle. In particular, the voltage converter is mounted on a housing of the machine, for example by screwing into holes of the voltage converter. Of course, the invention is not limited to the embodiment described and illustrated, which has been given by way of example. On the contrary, other applications of the electronic power module according to the invention are also possible without departing from the scope of the invention. In particular, the voltage converter could be independent of the electrical machine, for example by being mounted on a support other than the electric machine.
权利要求:
Claims (12)
[1" id="c-fr-0001]
An electronic power module (10), in particular intended to be integrated in a voltage converter (38), the power electronic module (10) comprising a planar substrate (12) comprising at least one trace of power (16a, 16b , 16c) overmolded at least in part of electrically insulating material, and an upper face (20) for receiving at least one electronic component (14) so as to be electrically connected to the at least one power trace (16a, 16b, 16c).
[2" id="c-fr-0002]
An electronic power module (10) according to claim 1, wherein the planar substrate (12) is devoid of sidewalls extending from the planar substrate (12), particularly from the upper face (20) of the planar substrate ( 12).
[3" id="c-fr-0003]
The power electronics module (10) according to claim 1 or 2, wherein the planar substrate (12) comprises an upper portion (70) comprising the at least one trace of power (16a, 16b, 16c) and a lower portion (72) comprising at least one open cavity (22), the bottom of the open cavity (22) being formed at least in part by at least a portion of the at least one power trace (16a, 16b, 16c).
[4" id="c-fr-0004]
An electronic power module (10) according to claim 3, wherein the lower portion (72) and the upper portion (70) of the planar substrate (12) are formed in continuity of material.
[5" id="c-fr-0005]
5. Assembly (30) of an electronic power module (10) and a support (28) of power electronic module, in particular intended to be integrated in a voltage converter (38), comprising: - an electronic module power unit (10) according to any one of claims 1 to 4, the power electronic module (10) comprising a lower portion (72) comprising at least one open cavity (22); and a power electronic module support (28) comprising a receiving cavity (32) of the power electronic module (10), the receiving cavity (32) comprising a bottom from which extends substantially perpendicularly at least one protrusion (36) of the support (28); and wherein the or each open cavity (22) of the power electronics module (10) is for receiving at least one protuberance (36).
[6" id="c-fr-0006]
6. The assembly (30) according to claim 5, wherein the bottom of the or each open cavity (22) of the electronic module (10) is formed at least in part by at least a portion of the at least one trace of power ( 16a, 16b, 16c).
[7" id="c-fr-0007]
7. The assembly (30) according to claim 5 or 6, wherein the electronic power module (10) is mechanically supported by the at least one protrusion (36).
[8" id="c-fr-0008]
8. Assembly (30) according to any one of claims 5 to 7, wherein the receiving cavity (32) is intended to receive an insulating material (A), so that the power electronic module (10) is embedded in the insulating material (A).
[9" id="c-fr-0009]
An electronic architecture, in particular intended to be integrated in a voltage converter (38), comprising a plurality of electronic power modules (10) and a support (28) common to the power electronic modules (10) so that each module power electronics (10) and the carrier (28) forms an assembly (30) according to any one of claims 5 to 8.
[10" id="c-fr-0010]
10. Voltage converter (38) in particular for powering an electric machine, comprising at least one electronic architecture according to claim 9 or an assembly according to one of claims 5 to 8.
[11" id="c-fr-0011]
11. Voltage converter (38) according to claim 10, comprising a heat sink forming the support (28) of the electronic power module or modules.
[12" id="c-fr-0012]
12. Electric machine for a motor vehicle comprising at least one voltage converter (38) according to claim 10 or 11 integrated with said electrical machine.
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同族专利:
公开号 | 公开日
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法律状态:
2016-12-29| PLFP| Fee payment|Year of fee payment: 2 |
2017-06-09| PLSC| Publication of the preliminary search report|Effective date: 20170609 |
2018-01-02| PLFP| Fee payment|Year of fee payment: 3 |
2019-12-31| PLFP| Fee payment|Year of fee payment: 5 |
2020-12-31| PLFP| Fee payment|Year of fee payment: 6 |
2021-12-31| PLFP| Fee payment|Year of fee payment: 7 |
优先权:
申请号 | 申请日 | 专利标题
FR1561739A|FR3044859B1|2015-12-02|2015-12-02|ELECTRONIC POWER MODULE, ELECTRONIC ARCHITECTURE COMPRISING SAME, VOLTAGE CONVERTER AND ELECTRIC MACHINE COMPRISING SAME|
FR1561739|2015-12-02|FR1561739A| FR3044859B1|2015-12-02|2015-12-02|ELECTRONIC POWER MODULE, ELECTRONIC ARCHITECTURE COMPRISING SAME, VOLTAGE CONVERTER AND ELECTRIC MACHINE COMPRISING SAME|
US15/363,315| US10405464B2|2015-12-02|2016-11-29|Electronic power module, electronic architecture comprising same, voltage converter and electric machine comprising same|
EP16201056.5A| EP3177115B1|2015-12-02|2016-11-29|Assembly of an electronic power module and a support for an electronic power module, electronic architecture including same, voltage converter and electric machine comprising same|
JP2016234561A| JP2017139450A|2015-12-02|2016-12-01|Electronic power module, electronic architecture including the same, voltage converter, and electric machine including the same|
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