Transformer and power supply device including the same

• US 10,312,012 B2
• Filed: 07/11/2014
• Issued: 06/04/2019
• Est. Priority Date: 08/29/2013
• Status: Active Grant

• Current Assignee: Solum Co., Ltd.
• Original Assignee: Solum Co., Ltd.
• Inventors: Eom, Jae Gen, Noh, Young Seung, Choi, Heung Gyoon, Park, Geun Young, Han, Sung Yun, Jang, Seh Hoon, Jeong, Nak Jun, Lee, Young Min, Kim, Jong Woo, Heo, Tae Won
• Primary Examiner(s): Hinson, Ronald
• Application Number:
  US14/329,258
• Publication Number:
  US 20150061805A1
• Time in Patent Office: 1,789 Days
• Field of Search: 336200
• CPC Class Codes: H01F 2027/065 Mounting on printed circuit boards
• CPC Class Codes: H01F 2027/2809 on stacked layers
• CPC Class Codes: H01F 2027/2819 Planar transformers with printed windings, e.g. surrounded by two cores and to be mounted on printed circuit
• CPC Class Codes: H01F 27/02 Casings
• CPC Class Codes: H01F 27/06 Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
• CPC Class Codes: H01F 27/24 Magnetic cores
• CPC Class Codes: H01F 27/2804 Printed windings
• CPC Class Codes: H01F 27/2823 Wires H01F27/2866 takes precedence
• CPC Class Codes: H01F 27/2828 Construction of conductive connections, of leads
• CPC Class Codes: H01F 27/2847 Sheets; Strips H01F27/2866 takes precedence
• CPC Class Codes: H01F 27/2885 with shields or electrodes shields or electrodes for pancake coils H01F27/2871; construction of electric or magnetic shields or screens H01F27/36
• CPC Class Codes: H01F 27/32 Insulating of coils, windings, or parts thereof
• CPC Class Codes: H01F 27/323 Insulation between winding turns, between winding layers
• CPC Class Codes: H01F 27/324 Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
• CPC Class Codes: H01F 27/327 Encapsulating or impregnating encapsulating coil and core H01F27/022

Abstract

A transformer includes a magnetic core, a first coil unit and a second coil unit. The first coil unit is disposed within the magnetic core and includes a laminated board having layers laminated therein and conductive patterns. Respective ones of the conductive patterns are disposed on the laminated layers. The second coil unit includes a conductive wire spaced apart from the conductive patterns of the laminated board by an insulating distance. The conductive wire includes a triple-insulated wire surrounded by three sheets of insulating paper to maintain the insulating distance from the conductive patterns.

Claims

1. A transformer, comprising:

a magnetic core;

a first coil unit disposed within the magnetic core and including a laminated board having layers laminated therein and conductive patterns for forming a primary coil, respective ones of the conductive patterns being disposed on the laminated layers; and

a second coil unit including a conductive wire for forming a secondary coil spaced apart from the conductive patterns of the laminated board by an insulating distance,

wherein the laminated board includes a first layer on which a conductive pattern is disposed, a second layer on which a shielding pattern is disposed, and a third layer on which a Vcc pattern for forming an induction current is disposed,

wherein the conductive pattern, the shielding pattern, and the Vcc pattern of the laminated board are disposed around a through hole allowing a middle leg of the magnetic core to be inserted thereinto,

wherein a maximum width of an edge of the shielding pattern is greater than a maximum width of an edge of the Vcc pattern, and

wherein the first coil unit comprises a connector to electrically connect an external board and a stoppage protrusion,

wherein the stoppage protrusion is disposed between a side wall of the magnetic core and the connector, disposed to correspond to the side wall of the magnetic core, and prevents insertion of the connector in a direction of the middle leg.

2. The transformer of claim 1, wherein a thickness of the triple-insulated wire is less than a thickness of the laminated board.

3. The transformer of claim 1, wherein a distance from the conductive wire of the second coil unit to a conductive pattern of a layer directly adjacent to the conductive wire is less than 0.4 mm.

4. The transformer of claim 1, further comprising a spacer disposed between an inner surface of the magnetic core and the first coil unit, the spacer allowing the second coil unit to be in contact with the first coil unit and another portion of the inner surface of the magnetic core.

5. The transformer of claim 4, wherein the spacer includes a buffering material formed of rubber.

6. The transformer of claim 4, wherein the spacer includes a conductive material.

7. The transformer of claim 1, wherein an area of the shielding pattern is greater than an area of the Vcc pattern.

8. The transformer of claim 1, wherein the third layer is disposed to be adjacent to the second coil unit.

9. The transformer of claim 1, wherein the third layer is disposed above or below the shielding pattern in a lamination direction.

10. The transformer of claim 1, wherein the third layer is disposed above or below the conductive pattern in a lamination direction.

11. The transformer of claim 1, wherein the third layer is disposed between the shielding pattern and the conductive pattern.

12. A power supply device, comprising the transformer according to claim 1.