Transformer

Patent metadata

Field	Value
Publication number	US-12046412-B2
Application number	US-201917253191-A
Country	US
Kind code	B2
Filing date	Jun 14, 2019
Priority date	Jun 22, 2018
Publication date	Jul 23, 2024
Grant date	Jul 23, 2024

Abstract

The present invention pertains to a transformer, and more specifically, to a transformer which includes a primary coil unit comprising wound conductive lines, and a secondary coil unit in which conductive plates are stacked. The transformer according to an embodiment of the present invention may include: a bobbin; a core unit which is coupled to the bobbin along the outer side of the bobbin; and a plurality of conductive plates which are inserted into the bobbin and stacked in the thickness direction.

First claim

The invention claimed is:

1. A transformer, comprising:
a bobbin;
a core part disposed outside the bobbin to expose a portion of the bobbin; and
a plurality of conductive plates inserted into the bobbin, the plurality of conductive plates constituting an upper coil part, a middle coil part, and a lower coil part,
wherein the bobbin comprises:
a lower receiving part receiving the lower coil part;
a middle receiving part disposed on the lower receiving part to receive the middle coil part;
an upper receiving part disposed on the middle receiving part to receive the upper coil part;
an upper connection part connecting the upper receiving part and the middle receiving part; and
a lower connection part connecting the middle receiving part and the lower receiving part,
wherein the upper receiving part comprises a first protruding portion covering at least a portion of an upper surface of an uppermost conductive plate of the upper coil part, and
wherein the lower receiving part comprises a second protruding portion covering at least a portion of a lower surface of a lowermost conductive plate of the lower coil part,
wherein the upper receiving part comprises:
a bottom portion that is in contact with the upper connection part;
a middle portion forming a sidewall of the upper receiving part and extending upwards from at least a region of an edge of an upper surface of the bottom portion; and
a top portion disposed along an upper surface of the middle portion, and
wherein an upper surface of the top portion protrudes inwards such that an end of the upper surface is further inwards than a lower surface of the top portion that is in contact with the middle portion when viewed in plan,
wherein an inner side surface of the top portion connects the end of the upper surface to the lower surface of the top surface, and the inner side surface is formed at an incline with respect to a plane corresponding to the upper surface of the top portion and a plane corresponding to the lower surface of the top portion.

2. The transformer according to claim 1 , wherein the first protruding portion protrudes from the top portion.

3. The transformer according to claim 1 , wherein outer side surfaces of the bottom portion, the middle portion and the top portion are aligned in a thickness direction.

4. The transformer according to claim 1 , wherein the inner side surface of the top portion and an inner side surface of the middle portion form an obtuse angle therebetween.

5. The transformer according to claim 1 , wherein an edge of at least a portion of the upper surface of the uppermost conductive plate of the upper coil part is in contact with the inner side surface of the top portion that is formed at the incline.

6. The transformer according to claim 1 , wherein each of the plurality of conductive plates comprises:
a coil portion corresponding to a winding of a secondary coil; and
a first connection portion and a second connection portion respectively extending from both ends of the coil portion in one direction,
wherein the one direction has a predetermined inclination with respect to a long-axis direction of the core part when viewed in plan.

7. The transformer according to claim 6 , wherein each of the plurality of conductive plates comprises:
a first boundary portion between an outer side of one end of the coil portion and the first connection portion;
a second boundary portion between an inner side of the one end and the first connection portion;
a third boundary portion between an inner side of another end of the coil portion and the second connection portion; and
a fourth boundary portion between an outer side of the other end and the second connection portion.

8. The transformer according to claim 7 , wherein a curvature of any one boundary portion among the first boundary portion to the fourth boundary portion is greater than curvatures of three remaining boundary portions.

9. The transformer according to claim 8 , wherein the first connection portion is connected to a ground terminal,
wherein the second connection portion is connected to a signal terminal, and
wherein the any one boundary portion having a curvature greater than curvatures of the three remaining boundary portions is the fourth boundary portion.

10. The transformer according to claim 6 , wherein the plurality of conductive plates comprises:
a plurality of first type of conductive plates; and
a plurality of second type of conductive plates having a planar shape that is bilaterally symmetrical with a planar shape of the first type of conductive plates, and
wherein the plurality of first type of conductive plates and the plurality of second type of conductive plates are alternately disposed.

11. The transformer according to claim 6 , wherein the predetermined inclination is less than 87 degrees.

12. The transformer according to claim 1 , wherein each of the plurality of conductive plates comprises:
a coil portion corresponding to a winding of a secondary coil, the coil portion having an open annular planar shape;
a first connection portion extending from one end of the coil portion in a first direction; and
a second connection portion extending from another end of the coil portion in a second direction different from the first direction, and
wherein the first direction and the second direction form a predetermined angle therebetween when viewed in plan.

13. The transformer according to claim 12 , wherein the predetermined angle is between 3 degrees and 90 degrees.

14. The transformer according to claim 12 , wherein the first direction corresponds to a direction in which the plurality of conductive plates is inserted into the bobbin.

Assignees

• Lg Innotek Co Ltd

Inventors

• Yoon Soo Kwang
• Kim Yu Seon
• Bae Seok
• Lee Jung Ki

Classifications

• H01F27/29

  Terminals; Tapping arrangements {for signal inductances} · CPC title

• H01F27/2866 Primary

  Combination of wires and sheets · CPC title

• H01F5/02

  wound on non-magnetic supports, e.g. formers · CPC title

• H01F27/325 Primary

  Coil bobbins (formers for coils in general H01F5/02) · CPC title

• H01F27/2876

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