Transformer and power supply device including the same

• US 10,658,101 B2
• Filed: 04/22/2019
• Issued: 05/19/2020
• 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:
  US16/390,984
• Publication Number:
  US 20190252107A1
• Time in Patent Office: 393 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 in the magnetic core and including a laminated board having layers laminated therein and conductive patterns for forming a primary coil, the conductive patterns being disposed on the laminated layers;

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; and

a based disposed on a main board,

wherein the base includes a plurality of terminal pins electrically connecting the laminated board and the main board

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 the conductive pattern be laminated to form an inductor pattern having a coil shape, and

wherein the base includes an accommodation portion comprising a seating part having the coil unit seated therein and a side wall protruding from the seating part, wherein the side wall of the accommodation portion has a coil outlet as a passage through which the second coil unit is led out to an external surface of the accommodation portion.

2. The transformer of claim 1, wherein the first coil 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.

3. The transformer of claim 1, further comprising a spacer disposed between an inner surface of the magnetic core and the first coil unit, wherein the spacer includes a conductive material.

4. The transformer of claim 1, wherein the transformer further comprises a first terminal portion and a second terminal portion, and the second terminal portion includes a terminal strip supporting the second coil unit led out from the accommodation portion and a fastening recess to which an end of the second coil unit is fastened.

5. The transformer of claim 1, further comprising a spacer disposed between an inner surface of the magnetic core and the first coil unit, wherein the spacer includes a buffering material formed of rubber.

6. The transformer of claim 1, wherein the second coil unit has a thickness less than that of the first coil unit.