Module for high voltage power for converting a base of IGBT components
View Patent ↗This power switching cell comprises: at least two power components ( 4–6 ) forming a chain ( 2 ) of components electrically linked in series by way of at least one intermediate bond ( 52, 70 ), and a dielectric substrate inside which are incorporated said at least two components ( 4–6 ). Each intermediate bond ( 52, 70 ) as well as the faces of the components linked to this intermediate bond are entirely incorporated inside said substrate, and the faces not linked to an intermediate bond ( 52, 70 ) of the components situated at the ends of said chain ( 2 ) are disposed in such a way as to be separated from one another by way of the dielectric material forming said substrate ( 22 ). This substrate is formed of a stack of parallel sheets ( 24–27 ) of dielectric material, and each of the components ( 4–6 ) following in said chain is incorporated in the thickness of a different sheet.
1. A power switching cell comprising at least two power components incorporated in a substrate, said substrate being formed of a stack of sheets of dielectric material, each of said at least two power components being incorporated in the thickness of a different sheet of said stack of sheets of dielectric material, each of said at least two power components exhibiting a first face equipped with at least one point of electrical connection and also exhibiting one opposite second face equipped with at least one other point of electrical connection, said at least two power components forming a chain of power components electrically linked in series by way of at least one intermediate electrical connection, said at least one intermediate electrical connection being entirely incorporated inside said substrate, said at least one intermediate electrical connection electrically connecting said second face of one of said at least two power components to said first face of the other of said at least two power components in said chain of power components, said faces of said at least two power components that are unlinked to said at least one intermediate electrical connection being situated at the ends of said chain of power components so as to be disposed in such a way as to be separated from one another by means of said stack of sheets of dielectric of which said substrate is formed.
2. The power switching cell as claimed in claim 1 , wherein said faces of said at least two power components that are unlinked to said at least one intermediate electrical connection being situated at the ends of said chain of power components so as to point in different directions such that the shortest path between said faces of said at least two power components that are unlinked to said at least one intermediate electrical connection crosses said stack of sheets of dielectric material of which said substrate is formed and in which said at least two power components are incorporated.
3. The power switching cell as claimed in claim 1 , wherein said first face and said second face of each of said at least two power components are disposed in parallel relationship to the faces of said stack of sheets of dielectric material of which said substrate is formed and in which said at least two power components are incorporated.
4. The power switching cell as claimed in claim 3 , wherein at least one of said first face and of said second face of each of said at least two power components is flush with one side of that particular sheet of said stack of sheets of dielectric material of which said substrate is formed in which each of said two power components is incorporated.
5. The power switching cell as claimed in claim 1 , wherein said intermediate electrical connection between said at least two power components is formed by an electrical track that is etched on at least one of the faces of that particular sheet of said stack of sheets of dielectric material of which said substrate is formed in which one of said two at least power components is incorporated.
6. The power switching cell as claimed in claim 5 , wherein at least one of said at least two power components of said chain of power components is soldered to said etched electrical track.
7. The power switching cell as claimed in claim 1 , wherein said power switching cell further includes at least one channel provided inside said substrate so as to be operative for circulating a cooling fluid therethrough in order to enable at least one of said at least two power components incorporated in said substrate to be cooled by said circulating cooling fluid.
8. The power switching cell as claimed in claim 7 , wherein said power switching cell includes several channels for circulating a cooling fluid therethrough, and wherein each of said at least two power components is interposed between at least two of said several channels in such a way that said first face and said second face of each of said at least two power components are cooled by the cooling fluid circulating in said several channels.
9. The power switching cell as claimed in claim 8 , wherein at least one of said several channels for circulating a cooling fluid therethrough is provided in each sheet of said stack of sheets of dielectric material of which said substrate is formed.
10. The power switching cell as claimed in claim 9 , wherein said at least one of said several channels is provided in each sheet of said stack of sheets of dielectric material of which said substrate is formed such as to be situated beneath the one of said at least two power components that is soldered on the face of the particular sheet of said stack of sheets of dielectric material of which said substrate is formed to which said one of said at least two power components is soldered.
11. The power switching cell as claimed in claim 1 , wherein:
said substrate formed from said stack of sheets of dielectric material has at least one first opposing face and one second opposing face,
said power switching cell further includes a power electrical connection tag linked to said first face of one of said at least two power components of said chain of power components and a second power electrical connection tag linked to the second face of the other of said at least two power components of said chain of power components, and
said first power electrical connection and said second power electrical connection tag project respectively from said first opposing face and from said second opposing face of said substrate.
12. The power switching cell as claimed in claim 11 , wherein:
said substrate has a third face different from said first opposing face and from said second opposing face of said substrate,
said power switching cell further includes at least one third power electrical connection tag linked to said at least one intermediate electrical connection, and
said third power electrical connection tag projects from said third face of said substrate.
13. The power switching cell as claimed in claim 1 , wherein said at least two power components are each power transistors.
14. The power switching cell as claimed in claim 1 , wherein said substrate is of parallelepipedal shape.
15. The power switching cell as claimed in claim 1 , wherein the sheets of said stack of sheets of dielectric material of which said substrate is formed, incorporating said at least two power components, are all of identical size.