Magnetic device and power converter employing the same

• US 9,214,264 B2
• Filed: 07/16/2012
• Issued: 12/15/2015
• Est. Priority Date: 07/16/2012
• Status: Active Grant

• Current Assignee: Power Systems Technologies Company Limited (Flex, Ltd.)
• Original Assignee: Power Systems Technologies Company Limited (Flex, Ltd.)
• Inventors: Chandrasekaran, Sriram
• Primary Examiner(s): Enad, Elvin G
• Assistant Examiner(s): Hinson, Ronald
• Application Number:
  US13/550,404
• Publication Number:
  US 20140016370A1
• Time in Patent Office: 1,247 Days
• Field of Search: 336/150, 336/170
• US Class Current: 1/1
• CPC Class Codes: H01F 27/24 Magnetic cores
• CPC Class Codes: H01F 27/28 Coils; Windings; Conductive connections
• CPC Class Codes: H01F 3/10 Composite arrangements of magnetic circuits
• CPC Class Codes: H01F 3/14 Constrictions; Gaps, e.g. air-gaps in magnetic shunt paths H01F3/12
• CPC Class Codes: H01F 30/04 having two or more secondary windings, each supplying a separate load, e.g. for radio set power supplies
• CPC Class Codes: H02M 1/0064 Magnetic structures combining different functions, e.g. storage, filtering or transformation
• CPC Class Codes: H02M 1/4225 using a non-isolated boost converter
• CPC Class Codes: H02M 3/1584 with a plurality of power processing stages connected in parallel
• CPC Class Codes: H02M 3/33571 Half-bridge at primary side of an isolation transformer
• CPC Class Codes: Y02B 70/10 Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

A magnetic device and power converter employing the same. In one embodiment, the magnetic device includes a first L-core segment including a first leg and a second leg extending therefrom, and an opposing second L-core segment including a first leg and a second leg extending therefrom. The magnetic device also includes a winding formed around at least one of the first leg and the second leg of the first L-core segment or the second L-core segment.

Claims

1. A magnetic device, comprising:

a magnetic core, comprising;

a first core section, comprising;

a first L-core segment including a first leg and a second leg extending therefrom, and

an opposing second L-core segment including a first leg and a second leg extending therefrom;

a second core section, comprising;

a first L-core segment including a first leg and a second leg extending therefrom, and

an opposing second L-core segment including a first leg and a second leg extending therefrom, a surface of said second core section being mated to a surface of said first core section;

a center-tapped secondary winding with a first secondary winding formed around said first leg of said second L-core segment of said first core section and a second secondary winding formed around said first leg of said second L-core segment of said second core section; and

an inductor winding formed around said second leg of said second L-core segment of said first core section and said second leg of said second L-core segment of said second core section.

2. The magnetic device as recited in claim 1 wherein said second leg of said first L-core segment of said first core section is substantially perpendicular to said first leg of said first L-core segment of said first core section, and said second leg of said second L-core segment of said first core section is substantially perpendicular to said first leg of said second L-core segment of said first core section.

3. The magnetic device as recited in claim 1 wherein a length of said first leg of said first L-core segment of said first core section is elongated with respect to a length of said second leg of said first L-core segment of said first core section, and a length of said first leg of said second L-core segment of said first core section is elongated with respect to a length of said second leg of said second L-core segment of said first core section.

4. The magnetic device as recited in claim 1 wherein a thickness of said first leg and said second leg of said first L-core segment of said first core section is substantially equal and a thickness of said first leg and said second leg of said second L-core segment of said first core section is substantially equal.

5. The magnetic device as recited in claim 1 wherein said inductor winding is coupled to a center tap between said first secondary winding and said second secondary winding.

6. The magnetic device as recited in claim 1 wherein said first secondary winding is formed around said first leg of said first L-core segment of said first core section, said second secondary winding is formed around said first leg of said first L-core segment of said second core section, and said inductor winding is formed around said first leg of said second L-core segments of said first core section and said second core section.

7. The magnetic device as recited in claim 1 wherein an end surface of said first leg of said first L-core segment of said first core section is mated to an end surface of said first leg of said first L-core segment of said second core section, and an exterior surface of said second leg of said second L-core segment of said first core section is mated to an exterior surface of said second leg of said second L-core segment of said second core section.

8. The magnetic device as recited in claim 1 wherein an end surface of said second leg of said first L-core segment of said first core section is mated to an end surface of said second leg of said first L-core segment of said second core section, and an exterior surface of said first leg of said second L-core segment of said first core section is mated to an exterior surface of said first leg of said second L-core segment of said second core section.

9. The magnetic device as recited in claim 1 comprising a gap between a pair of adjacent legs.