Transformer

Patent metadata

Field	Value
Publication number	US-9666354-B2
Application number	US-201314015999-A
Country	US
Kind code	B2
Filing date	Aug 30, 2013
Priority date	May 24, 2013
Publication date	May 30, 2017
Grant date	May 30, 2017

Abstract

A transformer includes a primary winding unit, a secondary winding unit and a magnetic core. The primary winding unit includes a first input primary winding part and a first shielding winding part. The first input primary winding part is electrically connected to at least one switch component, and the first input primary winding part is electrically connected to the first shielding winding part. The secondary winding unit is inductively coupled to the primary winding unit, and the first shielding part is disposed between the first input primary winding part and the secondary winding part. Then, the primary winding unit and the secondary winding unit are assembled to the magnetic core.

First claim

What is claimed is:

1. A transformer, comprising:
a primary winding unit comprising:
a first input primary winding part;
a first shielding winding part, wherein the first input primary winding part is electrically connected to at least one switch component external to the primary winding unit, and the first input primary winding part is electrically connected to the first shielding winding part;
a second input primary winding part; and
a second shielding winding part;

a secondary winding unit inductively coupled to the primary winding unit, wherein the first shielding winding part is disposed between the first input primary winding part and the secondary winding part; and
a magnetic core, wherein the primary winding unit and the secondary winding unit are assembled to the magnetic core,
wherein the second shielding winding part is disposed between the second input primary winding part and the secondary winding unit, and the first shielding winding part and the second shielding winding part are disposed on two opposite sides of the secondary winding unit, and the first input primary winding part, the second input primary winding part, the first shielding winding cart and the second shielding winding art are electrically connected.

2. The transformer as claimed in claim 1 , wherein the first shielding winding part further comprises at least one shielding winding circuit board.

3. The transformer as claimed in claim 2 , wherein winding traces on the shielding winding circuit board are electrically connected to a static node.

4. The transformer as claimed in claim 2 , wherein winding traces on the shielding winding circuit board have a wire diameter corresponding to a smallest metal width in a circuit board manufacturing process or corresponding to a largest metal width which conforms to a window size of the transformer.

5. The transformer as claimed in claim 1 , wherein the first shielding winding part is electrically connected to a static node.

6. The transformer as claimed in claim 1 , wherein the first input primary winding part further comprises a plurality of primary winding circuit boards and the primary winding circuit boards are stacked with the first shielding winding part.

7. The transformer as claimed in claim 1 , wherein the first shielding winding part and the second shielding winding part comprise at least one shielding winding circuit board respectively.

8. The transformer as claimed in claim 7 , wherein winding traces on either the at least one shielding winding circuit board of the first shielding winding part or the at least one shielding winding circuit board of the second shielding winding part are electrically connected to a static node.

9. The transformer as claimed in claim 7 , wherein the winding traces on the shielding winding circuit board have a wire diameter corresponding to a smallest metal width in a circuit board manufacturing process or corresponding to a largest metal width which conforms to a window size of the transformer.

10. The transformer as claimed in claim 1 , wherein one of the first shielding winding part and the second shielding winding part is electrically connected to a static node.

11. The transformer as claimed in claim 1 , wherein the first input primary winding part further comprises a plurality of first primary winding circuit boards, and the first primary winding circuit boards are stacked with the first shielding winding part; and the second input primary winding part further comprises a plurality of second primary winding circuit boards, and the second primary winding circuit boards are stacked with the second shielding winding part.

12. A transformer, comprising:
a plurality of first primary winding circuit boards that comprises a first shielding winding circuit board;
at least one secondary winding circuit board stacked with the first primary winding circuit boards, further comprising:
a second shielding winding circuit board, winding traces on the second shielding winding circuit board are electrically connected to winding traces on the first shielding winding circuit board and close to the at least one secondary winding circuit board; and
winding traces on either the first shielding winding circuit board or the second shielding circuit board are electrically connected to the static node, wherein winding traces on the first shielding winding circuit board are close to at least one secondary winding circuit board;

a plurality of second primary winding circuit boards stacked in relative to the first primary winding circuit boards, wherein the at least one secondary winding circuit board is stacked between the first primary winding circuit boards and the second primary winding circuit boards, wherein winding traces on the second primary winding circuit boards are electrically connected to the winding traces on the second shielding winding circuit board and inductively coupled to winding traces on the at least one secondary winding circuit board; and
a magnetic core, wherein the first primary winding circuit boards and the at least one secondary winding circuit board are assembled to the magnetic core.

13. The transformer as claimed in claim 12 , wherein winding traces on one of the first primary winding circuit boards, which is the furthest away from the at least one secondary winding circuit board, are electrically connected to at least one switch component.

14. The transformer as claimed in claim 12 , wherein winding traces on the first shielding winding circuit board have a wire diameter corresponding to a smallest metal width in a circuit board manufacturing process or corresponding to a largest metal width which conforms to a window size of the transformer.

15. The transformer as claimed in claim 12 , wherein the static node is one of a ground terminal and a direct-current bus.

16. The transformer as claimed in claim 12 , wherein winding traces on the first primary winding circuit boards are electrically connected to winding traces on the first shielding winding circuit board and inductively coupled to winding traces on the at least one secondary winding circuit board.

17. The transformer as claimed in claim 12 , wherein the winding traces on the first shielding winding circuit board and the second shielding winding circuit board have a wire diameter corresponding to a smallest metal width in a circuit board manufacturing process or corresponding to a largest metal width which conforms to a window size of the transformer.

18. The transformer as claimed in claim 12 , wherein the static node is one of a ground terminal and a direct-current bus.

Assignees

• Delta Electronics Inc

Inventors

• Zuo Zhuang
• Zhou Jian
• Jiao De-Zhi

Classifications

• H01F27/24

  Magnetic cores · CPC title

• H01F27/2804

  Printed windings · CPC title

• H01F2027/2809

  on stacked layers · CPC title

• H01F27/289 Primary

  with auxiliary windings (for pancake coils H01F27/2871) · CPC title