Integrated magnetic assemblies and methods of assembling same

• US 9,991,043 B2
• Filed: 03/12/2014
• Issued: 06/05/2018
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Acleap Power Incorporated
• Original Assignee: General Electric Company
• Inventors: Andres, Joao Luiz, Uusitalo, Jouni Timo, Silva, Arturo
• Primary Examiner(s): Chan, Tsz
• Application Number:
  US14/206,560
• Publication Number:
  US 20140266530A1
• Time in Patent Office: 1,546 Days
• Field of Search: 336170, 336178, 336180, 336182, 336183, 336196, 336198, 336200, 336212, 336219, 336221, 336232
• CPC Class Codes: H01F 27/2852 Construction of conductive connections, of leads
• CPC Class Codes: H01F 27/29 Terminals; Tapping arrangements for signal inductances
• CPC Class Codes: H01F 27/306 Fastening or mounting coils or windings on core, casing or other support
• CPC Class Codes: H01F 27/323 Insulation between winding turns, between winding layers
• CPC Class Codes: H01F 3/14 Constrictions; Gaps, e.g. air-gaps in magnetic shunt paths H01F3/12
• CPC Class Codes: Y10T 29/49073 by assembling coil and core

Abstract

An integrated magnetic assembly includes a magnetic core, an input winding inductively coupled to the magnetic core, a first output winding inductively coupled to the magnetic core, and a second output winding inductively coupled to the magnetic core. The magnetic core includes first and second non-winding legs, and first and second winding legs. The first and second non-winding legs are spaced apart from one another, and the magnetic core defines an opening between the first and second non-winding legs. The input winding extends through the opening between the first and second non-winding legs, and is wound around each of the first and second winding legs. The first output winding is wound around the first winding leg. The second output winding is wound around the second winding leg.

Claims

1. An integrated magnetic assembly comprising:

a magnetic core comprising;

first and second non-winding legs, said first and second non-winding legs spaced apart from one another, said magnetic core defining a first opening between said first and second non-winding legs;

first and second winding legs, said first and second winding legs spaced apart from one another and defining a second opening between said first and second winding legs;

a first plate and a second plate positioned opposite said first plate, said first plate coupled to said second plate by at least said first and second non-winding legs; and

at least one of;

a first spacer extending from said first winding leg to said second plate to provide a first gap between said first winding leg and said second plate; and

a second spacer extending from said second winding leg to said second plate to provide a second gap between said second winding leg and said second plate;

an input winding inductively coupled to said magnetic core and comprising a first terminal segment, said first terminal segment of said input winding extending through the first opening between said first and second non-winding legs, such that said first terminal segment of said input winding extends from a first side of said first and second non-winding legs through the first opening to a second side of said first and second non-winding legs, said second side opposite said first side, said input winding further extending through the second opening between said first and second winding legs, said input winding wound separately around each of said first winding leg and said second winding leg, said first and second winding legs located on the second side of said first and second non-winding legs;

a first output winding inductively coupled to said magnetic core, said first output winding wound around said first winding leg; and

a second output winding inductively coupled to said magnetic core, said second output winding wound around said second winding leg.

2. An integrated magnetic assembly in accordance with claim 1, wherein said input winding further comprises a first winding segment wound around said first winding leg, a second winding segment wound around said second winding leg, and a second terminal segment extending through the first opening between said first and second non-winding legs.

3. An integrated magnetic assembly in accordance with claim 2, wherein said first terminal segment is substantially planar with and oriented substantially parallel to said second terminal segment.

4. An integrated magnetic assembly in accordance with claim 2, wherein said magnetic core further comprises a third non-winding leg disposed between said first and second non-winding legs, said first terminal segment extending between said first non-winding leg and said third non-winding leg, said second terminal segment extending between said second non-winding leg and said third non-winding leg.

5. An integrated magnetic assembly in accordance with claim 1, wherein said first output winding and said second output winding are formed from a unitary winding, said winding including an integrated output pin, wherein said first output winding and said second output winding are electrically coupled to one another by said integrated output pin.

6. An integrated magnetic assembly in accordance with claim 1, wherein each of said input winding, said first output winding, and said second output winding comprises a non-planar winding.

7. An integrated magnetic assembly in accordance with claim 1, wherein said magnetic core further comprises a first side, a second side, a first end, and a second end, said first and second ends extending between said first and second sides of said magnetic core, wherein said first side of said magnetic core includes the first opening, and wherein each of said first and second ends includes a ventilation opening defined therein.

8. An integrated magnetic assembly in accordance with claim 1, wherein said magnetic core further comprises a raised portion extending from an interior surface of one of said first and second plates towards the other of said first and second plates, said raised portion extending from a first side of said magnetic core towards an opposing second side, and between said first and second winding legs.

9. An integrated magnetic assembly in accordance with claim 1, wherein at least one of said first spacer and said second spacer is further configured to provide at least one of an inductance current and a saturation current in said magnetic core.

10. A method of assembling an integrated magnetic assembly, said method comprising:

providing a magnetic core including;

a first plate and a second plate positioned opposite the first plate;

first and second non-winding legs coupled to and between the first plate and the second plate;

first and second winding legs, wherein the first and second non-winding legs are spaced apart from one another, wherein the magnetic core defines a first opening between the first and second non-winding legs, wherein the first and second winding legs are spaced apart from one another and define a second opening between the first and second winding legs; and

at least one of;

a first spacer extending from said first winding leg to said second plate to provide a first gap between said first winding leg and said second plate; and

a second spacer extending from said second winding leg to said second plate to provide a second gap between said second winding leg and said second plate;

providing an input winding including a first terminal segment;

providing a first output winding;

providing a second output winding;

inductively coupling the input winding to the magnetic core such that the first terminal segment of the input winding extends through the first opening between the first and second non-winding legs, the first terminal segment of the input winding extending from a first side of the first and second non-winding legs through the first opening to a second side of the first and second non-winding legs, the second side opposite the first side, the input winding further extending through the second opening between the first and second winding legs, and separately around each of the first winding leg and the second winding leg, the first and second winding legs located on the second side of the first and second non-winding legs;

inductively coupling the first output winding to the magnetic core such that the first output winding is wound around the first winding leg; and

inductively coupling the second output winding to the magnetic core such that the second output winding is wound around the second winding leg.

11. A method of assembling an integrated magnetic assembly in accordance with claim 10, wherein the input winding further includes a first winding segment, a second winding segment, and a second terminal segment, and wherein inductively coupling the input winding to the magnetic core further comprises inductively coupling the input winding to the magnetic core such that the first winding segment is wound around the first winding leg, the second winding segment is wound around the second winding leg, and the second terminal segment extends through the first opening between the first and second non-winding legs.

12. A method of assembling an integrated magnetic assembly in accordance with claim 11, wherein inductively coupling the input winding to the magnetic core further comprises inductively coupling the input winding to the magnetic core such that the first terminal segment is substantially planar with and oriented substantially parallel to the second terminal segment.

13. A method of assembling an integrated magnetic assembly in accordance with claim 11, wherein the magnetic core further includes a third non-winding leg disposed within the opening between the first non-winding leg and the second non-winding leg, and wherein inductively coupling the input winding to the magnetic core further comprises inductively coupling the input winding to the magnetic core such that the first terminal segment extends between the first non-winding leg and the third non-winding leg, and the second terminal segment extends between the second non-winding leg and the third non-winding leg.

14. A method of assembling an integrated magnetic assembly in accordance with claim 10, further comprising configuring at least one of the first spacer and the second spacer to provide at least one of an inductance current and a saturation current in the magnetic core.

15. A magnetic core for an integrated magnetic assembly, said magnetic core comprising:

a first plate;

a second plate positioned opposite said first plate;

first and second non-winding legs coupled to and between said first plate and said second plate, said first and second non-winding legs spaced apart from one another, wherein said first plate, said second plate, said first non-winding leg, and said second non-winding leg define an opening between said first and second non-winding legs configured to receive a terminal segment of an input winding such that the terminal segment extends from a first side of said first and second non-winding legs through the opening to a second side of said first and second non-winding legs, the second side opposite the first side;

first and second winding legs extending between said first plate and said second plate, said first and second winding legs spaced apart from one another and cooperatively defining a winding channel therebetween configured to receive the input winding, said first and second winding legs located on the second side of said first and second non-winding legs;

at least one of;

a first spacer extending from said first winding leg to said second plate to provide a first gap between said first winding leg and said second plate; and

a second spacer extending from said second winding leg to said second plate to provide a second gap between said second winding leg and said second plate; and

a third non-winding leg disposed between said first and second winding legs and extending between said first plate and said second plate.

16. A magnetic core in accordance with claim 15, wherein said first and second winding legs are at least partially enclosed within said magnetic core by said first and second non-winding legs.

17. A magnetic core in accordance with claim 15, wherein said magnetic core further comprises a first side, a second side, a first end, and a second end, said first and second ends extending between said first and second sides of said magnetic core, wherein said first side of said magnetic core includes the opening, and wherein each of said first and second ends includes a ventilation opening defined therein.

18. A magnetic core in accordance with claim 15, further comprising a fourth non-winding leg disposed within the opening between said first and second non-winding legs, said fourth non-winding leg dividing the opening into a first opening defined by said first non-winding leg, said fourth non-winding leg, said first plate, and said second plate, and a second opening defined by said second non-winding leg, said fourth non-winding leg, said first plate, and said second plate.

19. A magnetic core in accordance with claim 15, further comprising a raised portion extending from an interior surface of one of said first and second plates towards the other of said first and second plates, said raised portion extending from a first side of said magnetic core towards an opposing second side, and between said first and second winding legs.

20. A magnetic core in accordance with claim 15, wherein at least one of said first spacer and said second spacer is further configured to provide at least one of an inductance current and a saturation current in said magnetic core.