TRANSFORMER, POWER SUPPLY DEVICE, AND DISPLAY DEVICE INCLUDING THE SAME

• US 20160352233A1
• Filed: 08/10/2016
• Published: 12/01/2016
• Est. Priority Date: 10/28/2013
• Status: Abandoned Application

• Current Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: JEONG, In Wha, KIM, Hugh, KIM, Hak Ryong, KIM, Myeong Chan
• Application Number:
  US15/233,147
• Publication Number:
  US 20160352233A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01F 2027/065 Mounting on printed circuit boards
• 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 27/245 made from sheets, e.g. grain-oriented H01F27/26 takes precedence
• CPC Class Codes: H01F 27/2804 Printed windings
• CPC Class Codes: H01F 27/36 Electric or magnetic shields or screens movable for varying inductance H01F21/10
• CPC Class Codes: H01F 27/366 made of ferromagnetic material
• 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: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02M 3/33523 with galvanic isolation between input and output of both the power stage and the feedback loop
• CPC Class Codes: H02M 3/33561 having more than one ouput with independent control

Abstract

A power supply device includes a coil unit including at least one primary coil wirelessly transmitting power according to switching frequency for switching input power, and at least one secondary coil spaced apart from the at least one primary coil. A power conversion ratio is determined with respect to the at least one primary coil according to magnetic flux directly received from the at least one primary coil. The power supply device also includes a support unit maintaining a distance between the at least one primary coil and the at least one secondary coil.

Claims

1. A transformer, comprising:

a plurality of primary coils delivering power according to a power conversion switching frequency at which input power is switched to be converted;

at least one secondary coil spaced apart from the at least one primary coil and converting power from the plurality of primary coils; and

a support unit maintaining a distance between the plurality of primary coils and the at least one secondary coil,

wherein the plurality of primary coils are respectively disposed at a same distance from the at least one secondary coil.

2. The transformer of claim 1, wherein the support unit includes the plurality of primary coils and the at least one secondary coil therein.

3. The transformer of claim 2, wherein the support unit further includes at least one magnetic sheet suppressing leakage of magnetic flux transmitted from the plurality of primary coils to the at least one secondary coil.

4. The transformer of claim 1, wherein a winding area of the at least one secondary coil is equal to or greater than a winding area of the plurality of primary coils.

5. The transformer of claim 1, wherein the support unit includes at least one board, and the plurality of primary coils is disposed on one surface of the at least one board, and the at least one secondary coil is disposed in an other surface, opposing the one surface of the at least one board.

6. The transformer of claim 5, wherein the support unit further includes at least one magnetic sheet suppressing leakage of magnetic flux transmitted from the plurality of primary coils to the at least one secondary coil.

7. The transformer of claim 1, wherein the support unit includes a first board and a second board laminated on the first board, and the plurality of primary coils is disposed on one surface of the first board and the at least one secondary coil is disposed on one surface of the second board.

8. The transformer of claim 7, wherein the support unit further includes at least one magnetic sheet disposed between the first board and the second board and suppressing leakage of magnetic flux transmitted from the plurality of primary coils to the at least one secondary coil.

9. The transformer of claim 7, wherein the support unit further includes a molding part fixing the first board and the second board.

10. The transformer of claim 1, wherein a direction in which a lead wire of the plurality of primary coils is led out and a direction in which a lead wire of the at least one secondary coil is led out are opposite to each other.

11. A power supply device, comprising:

an input part outputting a DC input power;

a first switch performing switching operation at a power conversion switching frequency;

a second switch performing switching operation at the power conversion switching frequency; and

a transformer comprising a first primary coil connected between the output port of the input part and the first switch, a second primary coil connected between the output port of the input part and the second switch, at least one secondary coil spaced apart from the first primary coil and a second primary coil and converting power from the first primary coil and the second primary coil, and a support unit maintaining a distance between each of the first primary coil and the second primary coil and the at least one secondary coil, wherein the first primary coil and a second primary coil are respectively disposed at a same distance from the at least one secondary coil.

12. The power supply device of claim 11, wherein the input part rectifies and smooths an AC input power to output the DC input power.

13. The power supply device of claim 11, wherein the first switch and the second switch are alternately switched.

14. The power supply device of claim 11, further comprising:

a first capacitor connected between the output port of the input part and the first primary coil; and

a second capacitor connected between the output port of the input part and the second primary coil.

15. The power supply device of claim 14, wherein each of the first capacitor and the second capacitor is a film capacitor.