Electrical power distribution plate comprising a protected distribution bar

Abstract

Electrical power distribution plate comprising a distribution bar, a first mounting board to which the distribution bar is attached and a contactor connected to the distribution bar. The plate comprises a second mounting board attached to the distribution bar so that the distribution bar is placed between the first mounting board and the second mounting board.

Claims

1. An electrical power distribution plate comprising a distribution bar, a first mounting board to which the distribution bar is attached, a contactor connected to the distribution bar, and a second mounting board attached to the distribution bar so that the distribution bar is placed between the first mounting board and the second mounting board, the distribution bar being bonded to the first mounting board and to the second mounting board by a conductive adhesive.

2. The plate of claim 1, wherein the contactor is an irremovable contactor mounted on the distribution bar via at least one cut-out made in the second mounting board.

3. The plate of claim 1, further comprising a cooling device attached to a face of the first mounting board opposite to the face facing the distribution bar.

4. The plate of claim 3, wherein the cooling device is bonded to the first mounting board.

5. The plate of claim 3, wherein the cooling device comprises an aluminum plate.

6. The plate of claim 3, wherein the cooling device comprises a sealed compartment making it possible to cause a cooling gas or a coolant to circulate.

7. The plate of claim 1, wherein the second mounting board comprises an electronic routing defining an electronic circuit on a surface of the second mounting board opposite to the surface of the said second mounting board facing the distribution bar.

8. The plate of claim 7, wherein the second mounting board is attached to the distribution bar by a conductive adhesive.

9. The plate of claim 7, further comprising electrical components coupled to the electronic routing on the second mounting board.

10. The plate of claim 7, further comprising an interfacing connection making it possible to couple the said plate to an electrical rack.

11. The plate of claim 10, further comprising a free portion of the distribution bar making it possible to achieve, at one end of the distribution bar a coupling between the distribution bar and a power interface of the electrical rack.

12. The plate of claim 7, wherein the second mounting board comprises heat-dissipating planes included between the surface facing the distribution bar and the surface on which the electronic routing is produced.

13. The plate of claim 1, wherein the distribution bar has a thickness of about 2 mm, and the first mounting board has a thickness of about 1.6 mm, and the second mounting board has a thickness of about 0.5 mm.

14. The plate of claim 1, further including vias extending between a face of the second mounting board facing the distribution bar and a face opposite to the second mounting board.

15. The plate of claim 3, wherein the cooling device comprises a sealed compartment, cooling of the distribution plate being improved by the use of forced convection.

16. An electrical distribution box comprising an electrical power distribution plate as described in any preceding claim.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Other advantages and features of the invention will appear on examination of the description of a detailed embodiment of the invention that is in no way limiting, and of the appended drawings, in which:

(2) FIG. 1, already described, illustrates schematically a view in section of an electrical power distribution plate according to the prior art;

(3) FIGS. 2 and 3 illustrate respectively schematically a view in section and a view from above of an electrical power distribution plate according to one embodiment.

(4) While the invention may be susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. The drawings may not be to scale. It should be understood, however, that the drawings and detailed description thereto are not intended to limit the invention to the particular form disclosed, but to the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present invention as defined by the appended claims.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(5) FIGS. 2 and 3 show respectively a view in section and a view from above of an electrical power distribution plate 10 according to one embodiment of the invention.

(6) The electrical power distribution plate 10 comprises a distribution bar 11 included between a first mounting board 12 and a second mounting board 13, a contactor 14 and a cooling device 15.

(7) The distribution bar 11 is bonded to the first mounting board 12 and to the second mounting board 13 with the aid of a conductive adhesive in order to improve the heat exchanges and electrical conduction as will be described below. The first and the second mounting boards 12 and 13 are made in this example of epoxy in order to ensure a good electrical insulation between the distribution bar 2 and the foreign bodies which might fall on the first and second mounting boards 12 and 13.

(8) In this illustrated example, the distribution bar 11 has a thickness of 4 mm give or take 0.2 mm, the first mounting board has a thickness of 1.6 mm give or take 0.2 mm, and the second mounting board has a thickness of 0.5 mm give or take 0.2 mm.

(9) The contactor 14 is an irremovable contactor 14 or a non line replaceable unit. The contactor 14 is attached in this example to the first mounting board 12 through a first cut-out made in the second mounting board 13 and through a second cut-out made in the electrical distribution bar 11 coaxial with the first cut-out. The contactor 14 is electrically connected directly to the distribution bar 11. The attachment of the contactor makes it possible to improve the rigidity of the assembly consisting of the distribution bar 11 and the first mounting board 12 and the second mounting board 13.

(10) The cooling device 15 is bonded to a face of the first mounting board 12 opposite to the face facing the distribution bar 11, with the aid of a thermally conductive adhesive. The conductive adhesive promotes the heat exchanges between the cooling device 15 and the second mounting board 13 which is directly in contact with the distribution bar 11 and the contactor 15 that are two power components giving off considerable heat when they are operating.

(11) In this example, the cooling device 15 comprises a sealed compartment 16 in which a coolant 17 circulates (for example: 60% glycol and 40% water).

(12) As illustrated in FIG. 3, the second mounting board 13 comprises an electronic circuit 18 routed on the surface of the second mounting board 13 opposite to the surface of the second mounting board 13 facing the distribution bar 11. The routing of the electronic circuit 18 on the second mounting board 13 makes it possible to define the second mounting board 13 as a circuit board. The second mounting board 13 comprises electronic components 19 electrically coupled to the electronic circuit 18, an interfacing connection 20 electrically connected to the electronic circuit 18, and vias 21 making it possible to electrically couple the distribution bar 11 to the electronic circuit 18.

(13) The interfacing connection 20 makes it possible to control the electrical signals transmitted to the electronic components 19 via the electronic circuit 18.

(14) The interfacing connection 20 is coupled to a connector corresponding to an electrical rack 30. The electrical rack 30 also comprises a power interface 31 that is electrically connected to the distribution bar 11 when the electrical power distribution plate 10 is plugged into the electrical rack 30. The electrical coupling between the distribution bar 11 and the power interface 31 is achieved by plugging a free portion 110 of the distribution bar 11, that is to say a portion not covered by the second mounting board 13 and/or the first mounting board 12, into the power interface 31.

(15) The electrical rack 30 also comprises a conductive bar 32 connected to the power interface 31 and making it possible to carry the electrical power from the distribution bar 11 to other distribution bars of plates plugged into the rack for example.

(16) Moreover, as illustrated in FIGS. 2 and 3, the second mounting board 13 comprises heat-dissipation planes 22 made of copper and included between the surface facing the distribution bar 11 and the surface on which the electronic routing 18 is produced.

(17) Moreover, the distribution plate 10 also comprises an insulating board connection 23 bonded between the first mounting board 12 and the second mounting board 13 at the end of the distribution bar 11 opposite to the end comprising the free portion 110. The insulating board connection can be included over the whole perimeter with the exception of the free portion 110 so as to insulate the distribution bar 11.

(18) The proposed invention makes it possible to incorporate the distribution bar of an electrical power distribution plate between two insulating mounting boards so as to protect the distribution bar from foreign bodies that may come into contact with the distribution bar and create short circuits or electrical arcs.

(19) The invention makes it possible to gain weight in the incorporation of the power bar and reduce the cost of fabrication, given the reduced number of steps and of fastening elements relative to the prior art.

(20) The invention also makes it possible to obtain a better heat dissipation of the contactor, and of the assembly consisting of the distribution bar and of the first and second mounting boards. Moreover, the distribution plate thus proposed can be plugged into an electrical rack so as to allow several plates to be rack installed and to make replacement easier.

(21) Moreover, since the distribution bar is completely protected, the distribution box comprising the distribution bar can be open and comprise no cover, thus reducing the volume that the distribution box occupies. Finally, the electrical routing that is produced makes it possible to dispense with the electronic cabling between the electronic components of the distribution plate and the control electronics.

(22) Further modifications and alternative embodiments of various aspects of the invention will be apparent to those skilled in the art in view of this description. Accordingly, this description is to be construed as illustrative only and is for the purpose of teaching those skilled in the art the general manner of carrying out the invention. It is to be understood that the forms of the invention shown and described herein are to be taken as examples of embodiments. Elements and materials may be substituted for those illustrated and described herein, parts and processes may be reversed, and certain features of the invention may be utilized independently, all as would be apparent to one skilled in the art after having the benefit of this description of the invention. Changes may be made in the elements described herein without departing from the spirit and scope of the invention as described in the following claims.