Electrical power module

Patent metadata

Field	Value
Publication number	US-11444543-B2
Application number	US-201816765412-A
Country	US
Kind code	B2
Filing date	Nov 16, 2018
Priority date	Nov 21, 2017
Publication date	Sep 13, 2022
Grant date	Sep 13, 2022

Abstract

An electrical power module comprising power components and supports, each including at least one metal portion, the metal portions of the supports forming a substrate of the electrical power module, at least one support comprising two angled metal portions that are angled relative to each other at an angle that is greater than 0°, each power component being fastened to two metal portions of two distinct supports by being positioned between said two metal portions, the electrical power module being arranged in such a manner that electrical power currents going to or coming from the power components flow in the metal portions of the supports.

First claim

The invention claimed is:

1. An electrical power module comprising:
power components; and
supports, each of the supports comprising at least one metal portion, the metal portions of the supports together forming a substrate of the electrical power module each power component being fastened to two metal portions of two distinct supports by being positioned between said two distinct supports,
wherein the electrical power module is arranged in such a manner that electrical power currents going to or coming from the power components flow in the metal portions of the supports,
wherein at least one of the supports is an angled support comprising a first metal portion and a second metal portion that are mutually orthogonal,
wherein at least a first power component among said power components, is fastened to the first metal portion of said angled support, and at least a second power component, among said power components and distinct from the first power component, is fastened to the second metal portion of said angled support.

2. The electrical power module according to claim 1 , wherein the first metal portion and the second metal portion are fastened together by fastener means, and
wherein the two first metal portion and the second metal portion are arranged in such a manner that the angle between them can be adjusted when the electrical power module is integrated in a housing, the fastener means enabling the angle between the first metal portion and the second metal portion to be adjusted.

3. The electrical power module according to claim 1 , wherein the power components include controllable components, the electrical power module including tracks for conveying electrical control currents for the controllable components, each track being insulated from a metal portion of a support by an electrically insulating layer.

4. The electrical power module according to claim 3 , wherein at least one of the tracks comprises a conductive material including silver and an oxide, the conductive material being dispersed in a binder suitable for silk-screen printing.

5. The electrical power module according to claim 3 , wherein the electrically insulating layer comprises an inorganic insulating material of the glass frit type, the inorganic insulating material being dispersed in a binder suitable for silk-screen printing.

6. The electrical power module according to claim 1 , wherein one face of each power component is fastened to a metal portion of a support by sintering.

7. The electrical power module according to claim 1 , wherein the supports are partially covered in ferromagnetic ceramic forming lowpass filters.

8. The electrical power module according to claim 1 , wherein the supports define a channel inside the electrical power module, the electrical power module being arranged in such a manner that a fluid flows in the channel in order to cool the electrical power module.

9. The electrical power module according to claim 8 , further including a leak-tight plastics material cover that also defines the channel, the cover being fastened to supports.

10. The electrical power module according to claim 1 , wherein the supports are fabricated by using an additive fabrication technique.

11. The electrical power module according to claim 1 , wherein cooling channels are defined inside the supports.

12. The electrical power module according to claim 1 , including at least three supports.

13. The electrical power module according to claim 1 , wherein at least one of the supports is of a thickness Es such that:
5· Ep<Es< 30· Ep

where the chips of the power components mounted on said at least of the supports present a mean thickness of Ep.

14. The electrical power module according to claim 1 , the power components include two transistors and two diodes forming a single bridge arm, the electrical power module including a first support in which there flows a power supply electric current at a positive DC power supply voltage, a second support in which there flows an AC output current, and a third support-in which there flows a power supply electric current at a negative DC power supply voltage.

15. The electrical power module according to claim 14 , including a first transistor and a second transistor forming a single bridge arm, the first transistor and the second transistor being positioned on either side of a single support so as to be superposed and centered relative to each other.

16. The electrical power module according to claim 15 , wherein a first axis perpendicular to a face of the first transistor and passing through the center of said face is spaced apart from a second axis perpendicular to a face of the second transistor and passing through the center of said face by a distance that is less than or equal to one third of the length of a diagonal of the face having the larger area.

17. An electromechanical actuator comprising the electrical power module according to claim 14 and an electric motor.

Assignees

• Safran Electronics & Defense

Inventors

• Riou Jean-Christophe
• Bailly Eric
• Sridi-Convers Nawres

Classifications

• H05K7/209 Primary

  Heat transfer by conduction from internal heat source to heat radiating structure (H05K7/20909 takes precedence) · CPC title

• H05K7/20909

  Forced ventilation, e.g. on heat dissipaters coupled to components · CPC title

• H05K1/0272

  Adaptations for fluid transport, e.g. channels, holes · CPC title

• H02M7/003 Primary

  Constructional details, e.g. physical layout, assembly, wiring or busbar connections · CPC title

• H05K7/1427

  Housings · CPC title