Transformer and power supply board

• US 10,644,541 B2
• Filed: 01/03/2017
• Issued: 05/05/2020
• Est. Priority Date: 05/10/2016
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Zhao, Tianyue, Okamura, Masakazu, Guo, Weiqing
• Primary Examiner(s): Kaplan, Hal
• Assistant Examiner(s): Mourad, Rasem
• Application Number:
  US15/535,927
• Publication Number:
  US 20180204673A1
• Time in Patent Office: 1,218 Days
• 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 2038/143 for signals
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H01Q 7/08 Ferrite rod or like elongated core
• 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 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• CPC Class Codes: H04B 5/266 One coil at each side, e.g. with primary and secondary coils
• CPC Class Codes: H05K 1/14 Structural association of two or more printed circuits providing electric connection to or between printed circuits H05K1/11, H01R12/00

Abstract

Provided are a transformer and a power supply board including the transformer, the transformer includes: a power supply circuit, wherein the power supply circuit includes a power supply antenna and the power supply circuit is configured to transmit electric power through the power supply antenna; and a power receiving circuit, wherein the power receiving circuit includes a power receiving antenna and the power receiving circuit is configured to receive the electric power transmitted by the power supply antenna through the power receiving antenna. The transformer uses the principle of resonance wireless charging so as to improve the working frequency of the transformer, decrease the volume and weight of the transformer, save a magnetic core, and decrease or eliminate the magnetic core loss.

Claims

1. A transformer, comprising:

a power supply circuit, wherein the power supply circuit comprises a power supply antenna and the power supply circuit is configured to transmit electric power through the power supply antenna; and

a power receiving circuit, wherein the power receiving circuit comprises a power receiving antenna and the power receiving circuit is configured to receive the electric power transmitted by the power supply antenna through the power receiving antenna;

wherein the power supply circuit further comprises a power supply loop, the power receiving circuit further comprises a power receiving loop,

the power supply loop, the power supply antenna, the power receiving antenna and the power receiving loop are disposed on a same printed circuit board, and

the power supply loop and the power receiving loop are located on a same surface of the same printed circuit board;

the power supply loop comprises a power supply resonance circuit and a high frequency resonance modulation circuit;

the power receiving loop comprises a power receiving resonance circuit and an AC-DC converter;

the power supply loop further comprises a power supply source, a gate driver, a control circuit, a crystal oscillator, and a power supply communication circuit; and

the power receiving loop further comprises a DC/DC converter, a battery, a battery monitoring circuit, a regulator, and a power receiving communication circuit which is in communication with the power supply communication circuit.

2. The transformer according to claim 1, wherein the power supply antenna is separated from the power receiving antenna.

3. The transformer according to claim 1, wherein the power supply circuit comprises a power supply ground terminal, the power receiving circuit comprises a power receiving ground terminal, and the power supply ground terminal is electrically connected with the power receiving ground terminal.

4. The transformer according to claim 1, wherein the printed circuit board comprises a first side and a second side which are disposed opposite to each other, the power supply antenna is disposed on the first side of the printed circuit board, and the power receiving antenna is disposed on the second side of the printed circuit board.

5. The transformer according to claim 4, wherein the power supply antenna is disposed on a surface of the first side, and the power receiving antenna is disposed on a surface of the second side.

6. The transformer according to claim 5, wherein the power supply antenna and the power receiving antenna both are helical antennas.

7. The transformer according to claim 5, wherein the power supply antenna and the power receiving antenna both are cylindrical helical antennas.

8. The transformer according to claim 7, wherein the cylindrical helical power supply antenna and the cylindrical helical power receiving antenna are coaxially disposed.

9. The transformer according to claim 7, wherein an axis of the cylindrical helical power supply antenna and an axis of the cylindrical helical power receiving antenna both are perpendicular to the surface of the first side or the surface of the second side.

10. The transformer according to claim 1, wherein the transformer is a resonance wireless power supply transformer, and a working frequency of the transformer is from 10 kHz to 30 MHz.

11. A power supply board, comprising the transformer according to claim 1.

12. The transformer according to claim 1, wherein the transformer is a resonance wireless power supply transformer, and a working frequency of the transformer is from 10 kHz to 30 MHz.