High-power electromagnetic assembly

Patent metadata

Field	Value
Publication number	US-9148984-B2
Application number	US-201313846679-A
Country	US
Kind code	B2
Filing date	Mar 18, 2013
Priority date	Oct 25, 2012
Publication date	Sep 29, 2015
Grant date	Sep 29, 2015

Abstract

The present disclosure provides a high-power electromagnetic assembly comprising an iron core and a coil winding around the iron core, the coil having at least one coil layer, wherein a heat sink is provided between the iron core and an adjacent coil layer and/or between two adjacent coil layers. The heat sink comprises a first panel, a second panel and multiple supporting structures in connection with the first and second panels, and the first panel, the second panel and the supporting structures together constitute multiple air channels for cooling airflows passing therethrough.

First claim

What is claimed is:

1. A high-power electromagnetic assembly, comprising a coil having at least two coil layers, wherein a heat sink is provided between adjacent coil layers to aid dissipating heat from the coil, an air channel is formed inside the heat sink along its longitudinal direction, the air channel is also provided between two adjacent coil layers to aid dissipating heat from the coil, and the longitudinal direction of the air channel of the heat sink is substantially consistent with an axial direction of the coil.

2. The high-power electromagnetic assembly according to claim 1 , wherein the heat sink is in close contact with at least one of the adjacent coil layers.

3. The high-power electromagnetic assembly according to claim 1 , wherein an insulating layer is provided between the heat sink and at least one of the adjacent coil layers.

4. The high-power electromagnetic assembly according to claim 1 , wherein opposite ends of the heat sink are level with opposite ends of the coil, respectively; or
wherein one of opposite ends of the heat sink is level with one of opposite ends of the coil, and the other of opposite ends of the coil is beyond the other of opposite ends of the heat sink; or
wherein opposite ends of the coil are beyond opposite ends of the heat sink, respectively.

5. A high-power electromagnetic assembly comprising an iron core and a coil winding around the iron core having at least one coil layer, wherein a heat sink is provided between the iron core and an adjacent coil layer and/or between two adjacent coil layers if there are at least two coil layers to aid the coil in dissipating heat from the coil and/or the iron core, an air channel is formed inside the heat sink along its longitudinal direction, the air channel is also provided between two adjacent coil layers to aid dissipating heat from the coil, and the longitudinal direction of the air channel of the heat sink is substantially consistent with an axial direction of the coil.

6. The high-power electromagnetic assembly according to claim 5 , wherein the heat sink is in close contact with at least one of the iron core and the adjacent coil layer, and/or the heat sink is in close contact with at least one of adjacent coil layers.

7. The high-power electromagnetic assembly according to claim 5 , wherein an insulating layer is provided between the heat sink and at least one of the iron core and the adjacent coil layer, and/or an insulating layer is provided between the heat sink and at least one of adjacent coil layers.

8. The high-power electromagnetic assembly according to claim 5 , wherein opposite ends of the heat sink are level with opposite ends of the coil; or
wherein one of opposite ends of the heat sink is level with one of opposite ends of the coil, and the other of the opposite ends of the coil is beyond the other of the opposite ends of the heat sink; or
opposite ends of the coil are beyond opposite ends of the heat sink, respectively.

9. The high-power electromagnetic assembly according to claim 5 , wherein a space enclosed by the iron core is referred to as an inner space of the iron core, and opposite ends of the coil are respectively beyond opposite ends of the heat sink in the inner space of the iron core.

10. The high-power electromagnetic assembly according to claim 5 , wherein an air gap is provided at a middle portion of the iron core wound around by the coil, the heat sinks are provided between the air gap and one of opposite ends of the coil and between the air gap and the other of opposite ends of the coil, and a distance between two heat sinks on both sides of the air gap is larger than that the air gap of the iron core.

11. A high-power electromagnetic assembly comprising a coil having at least two coil layers, or comprising an iron core and a coil winding around the iron core, wherein
a heat sink is provided between two adjacent coil layers and/or between the iron core and an adjacent coil layer,
the heat sink comprises a first panel, a second panel and multiple supporting structures in connection with the first and second panels,
the first panel, the second panel and the supporting structures together constitute multiple air channels for cooling airflows passing therethrough,
at least one air channel of the multiple air channels is formed inside the heat sink along its longitudinal direction,
the at least one air channel is also provided between two adjacent coil layers to aid in dissipating heat from the coil, and
the longitudinal direction of the at least one air channel is substantially consistent with an axial direction of the coil.

12. The high-power electromagnetic assembly according to claim 11 , wherein at least some of the air channels are provided with openings, and no conductive loop is formed on a cross section perpendicular to an airflow direction of the air channels having the openings.

13. The high-power electromagnetic assembly according to claim 12 , wherein the openings are defined on the first panel and/or the second panel.

14. The high-power electromagnetic assembly according to claim 13 , the first panel and/or the second panel being in close contact with the iron core or the coil layer to close the openings.

15. The high-power electromagnetic assembly according to claim 13 , wherein each air channel is provided with an opening, adjacent openings of the air channels are defined on the first panel and the second panel respectively, and the openings on the first panel alternate with those on the second panel.

16. The high-power electromagnetic assembly according to claim 13 , wherein a total area of all openings on the first panel is less than 50% of an area of the first panel, and a total area of all openings on the second panel is less than 50% of an area of the second panel.

17. The high-power electromagnetic assembly according to claim 13 , wherein each air channel is provided with an opening, and all of the openings are defined on the first panel or the second panel.

18. The high-power electromagnetic assembly according to claim 11 , wherein the first panel is parallel to the second panel.

19. The high-power electromagnetic assembly according to claim 18 , wherein both the first panel and the second panel are flat shaped or arc-plate shaped.

20. The high-power electromagnetic assembly according to claim 11 , wherein the first panel, the second panel and the supporting structures are made of metal material.

21. The high-power electromagnetic assembly according to claim 11 , wherein the cross section of the air channel has a rectangular shape, a triangular shape, a trapezoidal shape, a circular shape or an oval shape.

22. The high-power electromagnetic assembly according to claim 11 , wherein each air channel is provided with at least one fin.

23. The high-power electromagnetic assembly according to claim 22 , wherein the fin is parallel to the air channel or has a spiral shape.

24. The high-power electromagnetic assembly according to claim 12 , wherein each opening is provided with an insulating seal.

25. The high-power electromagnetic assembly according to claim 11 , wherein the heat sink further comprises a middle substrate between the first panel and the second panel, the multiple supporting structures being in connection with the first panel and the middle substrate and in connection with the second panel and the middle substrate respectively, two layers of multiple air channels for the

Assignees

• Delta Electronics Shanghai Co

Inventors

• Tong Aixing
• Liu Teng

Classifications

• H01F27/2876

  Cooling (cooling transformers and inductances in general H01F27/08) · CPC title

• H05K7/20909 Primary

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

• H01F27/322

  the insulation forming channels for circulation of the fluid · CPC title