Electric system having at least one inductor with improved architecture

Patent metadata

Field	Value
Publication number	US-2021225582-A1
Application number	US-201917057975-A
Country	US
Kind code	A1
Filing date	May 21, 2019
Priority date	May 24, 2018
Publication date	Jul 22, 2021
Grant date	—

Abstract

Disclosed is an electric system including at least a first electric circuit, an electric device, a first printed circuit board supporting the first electric circuit, a device for shielding the electric device including at least a first shielding plate attached to the first printed circuit board, the first electric circuit including at least one inductor, characterized in that the inductor includes at least one first ferromagnetic part attached to the first printed circuit board and arranged to have at least one air gap with respect to the first shielding plate in such a way as to form a magnetic circuit with it.

First claim

1 . An electric system comprising at least one first electric circuit, an electric device, a first printed circuit board supporting said first electric circuit, a device for shielding said electric device comprising at least one first shielding plate attached to said first printed circuit board, said first electric circuit comprising at least one inductor, wherein said inductor comprises at least one first ferromagnetic part attached to the first printed circuit board and arranged to have at least one air gap with said first shielding plate, in such a way as to form a magnetic circuit with the latter.

2 . The system according to claim 1 , wherein said air gap of the magnetic circuit is created between a first air gap surface of said first ferromagnetic part of the inductor and a second, opposite, air gap surface, belonging to said first shielding plate, and wherein this second air gap surface of the plate has a surface area lower than that of the total surface of the first shielding plate.

3 . The system according to claim 1 , wherein the first printed circuit board comprises at least one electrical insulating layer to which said first shielding plate is attached.

4 . The system according to claim 1 , wherein the system is of the contactless energy transmission type, comprising a second electric circuit, a second printed circuit board supporting the second electric circuit, a transformer forming said electric device and comprising a first winding to which said electric circuit is connected and a second winding to which said second electric circuit is connected.

5 . The system according to claim 4 , wherein the first electric circuit and the second electric circuit comprise an input power converter and a main converter comprising said transformer, a first switching bridge connected to the first winding of the transformer and a second switching bridge connected to the second winding of the transformer.

6 . The system according to claim 4 , wherein the first printed circuit board has a first face on which said first electric circuit is made and a second face to which said first shielding plate is attached.

7 . The system according to claim 4 , wherein said first winding of the transformer is attached to said first shielding plate.

8 . The system according to claim 4 , wherein the shielding device comprises a second shielding plate attached to the second printed circuit board and wherein said second printed circuit board has a first face to which said second shielding plate is attached and a second face on which said second electric circuit is made.

9 . The system according to claim 8 , wherein said second winding of the transformer is attached to said second shielding plate.

10 . The system according to claim 8 , wherein the second printed circuit board comprises at least one second electrical insulating layer to which said second shielding plate is attached.

11 . The system according to claim 2 , wherein the first printed circuit board comprises at least one electrical insulating layer to which said first shielding plate is attached.

12 . The system according to claim 2 , wherein the system is of the contactless energy transmission type, comprising a second electric circuit, a second printed circuit board supporting the second electric circuit, a transformer forming said electric device and comprising a first winding to which said electric circuit is connected and a second winding to which said second electric circuit is connected.

13 . The system according to claim 3 , wherein the system is of the contactless energy transmission type, comprising a second electric circuit, a second printed circuit board supporting the second electric circuit, a transformer forming said electric device and comprising a first winding to which said electric circuit is connected and a second winding to which said second electric circuit is connected.

14 . The system according to claim 5 , wherein the first printed circuit board has a first face on which said first electric circuit is made and a second face to which said first shielding plate is attached.

15 . The system according to claim 5 , wherein said first winding of the transformer is attached to said first shielding plate.

16 . The system according to claim 6 , wherein said first winding of the transformer is attached to said first shielding plate.

17 . The system according to claim 5 , wherein the shielding device comprises a second shielding plate attached to the second printed circuit board and in that said second printed circuit board has a first face to which said second shielding plate is attached and a second face on which said second electric circuit is made.

18 . The system according to claim 6 , wherein the shielding device comprises a second shielding plate attached to the second printed circuit board and in that said second printed circuit board has a first face to which said second shielding plate is attached and a second face on which said second electric circuit is made.

19 . The system according to claim 7 , wherein the shielding device comprises a second shielding plate attached to the second printed circuit board and in that said second printed circuit board has a first face to which said second shielding plate is attached and a second face on which said second electric circuit is made.

20 . The system according to claim 9 , wherein the second printed circuit board comprises at least one second electrical insulating layer to which said second shielding plate is attached.

Assignees

• Commissariat Energie Atomique

Inventors

• Regnat Guillaume
• Lefevre Guillaume

Classifications

• H01F38/14 Primary

  Inductive couplings {(for wireless supply or distribution of electric power using inductive coupling H02J50/10)} · CPC title

• H01F27/361 Primary

  made of combinations of electrically conductive material and ferromagnetic material · CPC title

• H02M3/33573

  Full-bridge at primary side of an isolation transformer · CPC title

• H02M3/01

  Resonant DC/DC converters · CPC title

• H02J50/70

  involving the reduction of electric, magnetic or electromagnetic leakage fields · CPC title