Classifications

• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
  • H05K7/00—Constructional details common to different types of electric apparatus
  • H05K7/14—Mounting supporting structure in casing or on frame or rack
  • H05K7/1438—Back panels or connecting means therefor; Terminals; Coding means to avoid wrong insertion
  • H05K7/1457—Power distribution arrangements
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
  • H05K7/00—Constructional details common to different types of electric apparatus
  • H05K7/14—Mounting supporting structure in casing or on frame or rack
  • H05K7/1422—Printed circuit boards receptacles, e.g. stacked structures, electronic circuit modules or box like frames
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
  • H05K5/00—Casings, cabinets or drawers for electric apparatus
  • H05K5/0017—Casings, cabinets or drawers for electric apparatus with operator interface units
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
  • H05K7/00—Constructional details common to different types of electric apparatus
  • H05K7/14—Mounting supporting structure in casing or on frame or rack
  • H05K7/1422—Printed circuit boards receptacles, e.g. stacked structures, electronic circuit modules or box like frames
  • H05K7/1427—Housings
  • H05K7/1432—Housings specially adapted for power drive units or power converters
  • H05K7/14322—Housings specially adapted for power drive units or power converters wherein the control and power circuits of a power converter are arranged within the same casing

Definitions

• the present invention relates to an electrical control device, intended in particular for the aeronautical field.
• An electrical control device conventionally comprises a power module comprising power switches controlled by at least one control card.
• the power switches are for example insulated gate field effect transistors more commonly called MOSFET (English acronym for Metal Oxide Semiconductor Field Effect Transistor) or bipolar insulated gate transistors, called IGB ⁇ , (English acronym for insulated Gâte Bipolar Transistor ).
• MOSFET Metal Oxide Semiconductor Field Effect Transistor
• IGB ⁇ bipolar insulated gate transistors
• the electrical connection means connecting said control card and said control module can be formed by one or more dedicated connectors each grouping, within the same area, the different inputs or outputs to be connected. This requires adapting the control card and the power module so as to group said inputs or outputs by zones. Furthermore, such a solution has a significant cost and requires the use of a specific component, namely the connector.
• Another known solution is to connect a pin to each relevant zone of the power module in order to connect said zone of the power module to a specific zone of the control card. Such a form then does not require grouping the inputs and outputs in the same area of the control card and the power module.
• the pins pass through holes in the control card and are soldered to tracks on said card, which prevents or complicates the subsequent disassembly of the control card and the power module. Furthermore, the soldering operations are particularly tedious and expensive.
• the rise in temperature of the pin at its end connected to the control board can generate a rise in temperature at its other end, risking damage to the solder of this other end on the control module. Finally, such a rise in temperature risks damaging different components of the control card and / or the power module.
• the maintenance and test phases can be numerous, in particular in the aeronautical field. Such phases may require the disassembly of the control card and the power module, with a view to replacing one of these components, for visual inspection of the components, or with a view to carrying out tests on a only one of these components, isolated from the other.
• Another alternative consists in ensuring each electrical connection between the control card and the power module using a connection spring, coming to bear on a track of the control card or of the module.
• a connection spring coming to bear on a track of the control card or of the module.
• Such an embodiment is poorly suited to vibrations since these risks generating detachments of the spring relative to the connection track.
• vibrational phenomena can occur in different operating phases of an aircraft.
• the invention aims to remedy these drawbacks in a simple, reliable and inexpensive manner.
• the invention relates to an electrical control device comprising at least one power module comprising at least one controlled power switch, at least one control card fixed to the power module, and connection means electric connecting said control card and said control module, characterized in that the electrical connection means comprise at least one pin electrically connected and extending from the power module, or respectively the control card, and at least one receptacle electrically connected and mounted on the control card, or respectively the power module, the pin being inserted, at least in part, into the receptacle, said pin and the receptacle being designed to ensure an electrical connection between them while allowing removal of the spindle relative to said receptacle.
• each pin can be inserted into the corresponding receptacle so as to ensure the electrical connection between the control card and the power module, while allowing disassembly of the latter, for example in the event of maintenance, replacement, visual inspection, or test of at least one of these elements.
• the receptacle can be soldered to the control card.
• the spindle may have one end brazed to the power module and an opposite end, engaged in the receptacle.
• Such a device is particularly suitable for aeronautical constraints, which require a large number of maintenance phases or test phases before deployment of the control device on an aircraft.
• the spindle can be straight.
• the receptacle can be made, at least in part, of electrically conductive material and comprises a hollow part in which extends at least elastic member capable of coming to bear on the pin, so as to make the electrical connection between the receptacle and spindle.
• the elastic member can be formed by an elastically deformable tongue.
• the elastic member can be integrated into the hollow part.
• Said hollow part can be electrically connected, for example by soldering or any other suitable means, to a track or a conductive element of the control card.
• the receptacle may comprise at least two elastic members extending opposite one another in said hollow part.
• Each receptacle can have between four and eight tabs.
• the power module may comprise a connection part to which the pin is connected, and a hollow body delimiting an internal volume with the connection part, the control board being fixed on the body, the body comprising a hole for passage of the spindle, the spindle extending at least partly in said internal volume and passing through said orifice, the control card being located outside said volume.
• the control card can be fixed to the body by means of screws or rivets. The screws or rivets can extend parallel to the spindle.
• each screw can be engaged in a tapped blind part of the body. This avoids the entry of pollutants into the internal volume of the body, through the threaded part of the body.
• the body can be fixed by gluing to the connection part of the power module.
• the body can be hermetically attached to said connection part, so as to prevent the entry of pollutants.
• the body may comprise at least one tubular element forming the orifice for the passage of the spindle, said tubular element having a conical internal wall flared in the direction of the connection part.
• the free end of the spindle that is to say the end of the spindle opposite the connection part of the module power, can be guided by the conical wall in the tubular element before crossing it.
• the body may include a so-called upper wall, located on the side of the control card, the body comprising a projecting part of said upper wall, the control card coming to bear on said projecting part.
• the projecting parts at which the pins are located prevent the introduction of pollutants, by gravity or runoff along the pins, in particular liquid condensate.
• Such condensates can optionally be collected on the upper wall of the body but cannot be introduced into the orifice formed by the tubular part projecting from the upper wall.
• the spindle can be cylindrical, said orifice being able to be circular.
• the diameter of said hole may be larger than the diameter of the spindle.
• the clearance, oriented radially with respect to the axis of the spindle, can be approximately several tenths of a millimeter.
• the free end of the pin can be engaged in the receptacle is rounded or conical.
• Said free end of the spindle may for example have a hemispherical shape or a shape of a warhead.
• the receptacle may have a first open end through which the spindle is engaged, said first end comprising a tapered part flared in the direction of the power module.
• Said flared conical part makes it possible to guide the spindle and to facilitate its introduction into the receptacle, so as to compensate for any sizing or mounting tolerances.
• the receptacle may have a second closed end, opposite the first end.
• FIG. 1 is an exploded view, in section, of an electrical control device according to an embodiment of the invention
• Figure 2 is an assembled view, in section, of said electrical control device.
• Figures 1 and 2 show an electrical control device 1 comprising a power module 2 comprising a connection portion 3 comprising controlled power switches, such as for example as insulated gate field effect transistors more commonly referred to MOSFET (English acronym for Metal Oxide Semiconductor Field Effect Transistor) or insulated gate bipolar transistors, called IGBT, (English acronym for insulated Gâte Bipoiar Transistor).
• MOSFET Metal Oxide Semiconductor Field Effect Transistor
• IGBT insulated gate bipolar transistors
• Cylindrical pins 4 extend along an axis from the connection part 3, upwards in the figures.
• the pins 4 are metallic, for example copper.
• Each pin 4 has a first end 5, soldered on a connection track, and a second end 6, opposite the first end 5.
• the second end 6 has a rounded shape, for example hemispherical or in the shape of a warhead, or else a conical shape.
• the first end 5 can be widened, so as to strengthen the connection between the pin 4 and the connection part 3.
• the power module 2 further comprises a body 7 of plastic material, mounted on the connection part 3.
• the body 7 has a side wall 8, and a so-called upper wall 9, opposite to the connection part 3.
• the lower end of the side wall 8 is hermetically fixed to the connection part 3, for example by gluing.
• the upper wall 9, the side wall 8 and the connection part 3 delimit an internal volume 10 in which are housed in particular the power switches and, in part, the pins 4.
• Tubular parts 11 extend along the axis of the pins 4, from the upper wall 9.
• a tubular part 11 is associated with each pin 4.
• Each tubular part 11 has a part 12 projecting upwards, c 'that is to say opposite to the connection part 3, and a part 13 projecting downwards.
• Each tubular part 11 has an annular internal surface.
• the upper part 14 of each internal surface is cylindrical.
• the lower part 15 of each internal surface is conical and is flared downwards, so as to facilitate the introduction of the second ends 6 of the pins 4 into the tubular parts 11.
• the diameter of the cylindrical upper part 14 is greater than the diameter of the pins 4, so as to form a radial clearance between each pin 4 and the associated tubular part 11.
• the body 7 further comprises tapped and blind fastening zones 16, extending parallel to the pins 4 and to the tubular parts 11.
• the fixing zones 16 are open upwards.
• the electrical control device 1 further comprises a control card 17 comprising components capable in particular of generating a control signal for the power switches.
• the control card 17 includes orifices in which are housed metal receptacles 18.
• Each receptacle 18 comprises a hollow blind part 19, comprising a lower open end and a closed upper end. The open lower end may have an inner surface having a conical part intended to facilitate the guiding and insertion of the second end 6 of the corresponding pin 4.
• Each receptacle 18 further comprises elastically deformable tongues 20 (FIG. 1), coming integrally with the hollow part 19.
• the tongues 20 are regularly distributed over the circumference.
• the number of tabs 20 is for example between 4 and 8.
• Each tab 20 comes to bear resiliently on the second end 6 of the pin 4 so as to make an electrical connection between the receptacle 18 and the pin 4 and, more generally between the control card 17 and the connection part 3 of the power module 2.
• the tabs 20 allow the pin 4 to be removed from the receptacle 18.
• the receptacles 18 are soldered on connection tracks of the control card 17 and thus fixedly held on said control card 17.
• control card 17 is fixed to the body 7 by means of screws 21, engaged in holes 22 of the control card 17 and screwed into the threaded fixing zones 16 of the body 7.
• a washer 23 is mounted between the head of each screw 21 and the control board 17.
• the mounting of such a device 1 can be carried out as follows. First of all the first ends 5 of the pins 4 are brazed to the connection part 3, then the body 7 is glued to the connection part 3. When mounting the body 7 on the connection part 3, the pins 4 are introduced into the conical parts 13, 15 of the tubular parts 11 to open above said tubular parts 11. Furthermore, the receptacles 18 are soldered to the control board 17, the assembly then being mounted on the body 7, so the second ends 6 of the pins 4 engage and connect electrically in the receptacles 18. The control card 17 is then screwed onto the body 7 using the screws 21.
• control card 17 can be carried out simply by removing the screws 21 and separating the control card 17 from the body 7.
• the control card 17 or the power module 2 can then be replaced, tested independently of one another, cleaned or even visually inspected for example.

Landscapes

• Engineering & Computer Science (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Power Engineering (AREA)
• Coupling Device And Connection With Printed Circuit (AREA)
• Inverter Devices (AREA)
• Multi-Conductor Connections (AREA)
• Details Of Connecting Devices For Male And Female Coupling (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=65200941

Family Applications (1)

Country Status (4)

Family Cites Families (15)

• 2018
  • 2018-07-30 FR FR1857091A patent/FR3084557B1/fr active Active
• 2019
  • 2019-07-29 EP EP19759661.2A patent/EP3831174A1/de active Pending
  • 2019-07-29 US US17/264,435 patent/US11510332B2/en active Active
  • 2019-07-29 WO PCT/FR2019/051866 patent/WO2020025890A1/fr unknown

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