Device for wireless charging circuit

• US 9,627,917 B2
• Filed: 09/02/2014
• Issued: 04/18/2017
• Est. Priority Date: 10/21/2013
• Status: Active Grant

• Current Assignee: Delta Electronics Company Limited (Delta Electronics Incorporated)
• Original Assignee: Delta Electronics Company Limited (Delta Electronics Incorporated)
• Inventors: Li, Xinlei, Yan, Chao, Xu, Lizhi
• Primary Examiner(s): DIAO, M BAYE
• Application Number:
  US14/475,231
• Publication Number:
  US 20150108945A1
• Time in Patent Office: 959 Days
• Field of Search: 320108, 307104, 363 17, 363 2102
• CPC Class Codes: H01F 27/255 made from particles H01F27/26 takes precedence
• 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 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction

Abstract

The present application discloses a device for wireless charging circuit, comprising: a primary circuit box, which comprises at least one first switch unit; a secondary circuit box, which comprises at least one second switch unit; a transmission plate, which comprises a primary inductor of a transformer and a primary compensation capacitor, the primary inductor being coupled in series with the primary compensation capacitor; a receiving plate, which comprises a secondary inductor of the transformer; the transmission plate and the receiving plate are magnetically coupled with each other; the transmission plate is coupled with the primary circuit box; and the receiving plate is coupled with the secondary circuit box. The voltage between external terminals of transmission plate and the voltage between external terminals of receiving plate can satisfy the safety requirement.

Claims

1. A device for wireless charging circuit, the device comprising:

a primary circuit box, which comprises at least one first switch unit;

a secondary circuit box, which comprises at least one second switch unit;

a transmission plate, which comprises a primary inductor of a transformer and a primary compensation capacitor, the primary inductor being coupled in series with the primary compensation capacitor; and

a receiving plate, which comprises a secondary inductor of the transformer;

wherein the transmission plate and the receiving plate are magnetically coupled with each other;

the transmission plate is coupled with the primary circuit box; and

the receiving plate is coupled with the secondary circuit box; and

the transmission plate is a closed container, and the receiving plate is a closed container.

2. The device according to claim 1, wherein the receiving plate further comprises a secondary compensation capacitor, and the secondary inductor of the transformer is coupled in series with the secondary compensation capacitor.

3. The device according to claim 1, wherein the receiving plate further comprises a secondary compensation capacitor, and the secondary inductor of the transformer is coupled in parallel with the secondary compensation capacitor.

4. The device according to claim 1, wherein the secondary circuit box further comprises a secondary compensation capacitor, and the secondary inductor of the transformer is coupled in parallel with the secondary compensation capacitor.

5. The device according to claim 1, wherein the first switch unit comprises at least one bridge arm comprising two switches coupled in series, and the second switch unit comprises at least one bridge arm comprising two switches coupled in series.

6. The device according to claim 5, wherein each of the switches is a MOSFET or an IGBT or a diode.

7. The device according to claim 2, wherein the primary compensation capacitor of the transmission plate and the secondary compensation capacitor of the receiving plate respectively comprise a plurality of capacitors coupled in series.

8. The device according to claim 2, wherein the primary inductor and the primary compensation capacitor of the transmission plate and the secondary inductor and the secondary compensation capacitor of the receiving plate respectively consist of a plurality of units coupled in series, and each of the units comprises an inductor and a capacitor coupled in series.

9. The device according to claim 1, wherein the primary circuit box or the secondary circuit box further comprises a LC circuit network which comprises an inductor and a capacitor.

10. A device for wireless charging circuit, the device comprising:

a primary circuit box, which comprises at least one first switch unit;

a secondary circuit box, which comprises at least one second switch unit;

a transmission plate, which comprises a primary inductor of a transformer;

a receiving plate, which comprises a secondary inductor of the transformer and a secondary compensation capacitor, the secondary inductor being coupled in series with the secondary compensation capacitor;

wherein

the transmission plate and the receiving plate are magnetically coupled with each other;

the transmission plate is coupled with the primary circuit box;

the receiving plate is coupled with the secondary circuit box; and

the transmission plate is a closed container, and the receiving plate is a closed container.

11. The device according to claim 10, wherein the transmission plate further comprises a primary compensation capacitor, and the primary inductor of the transformer is coupled in parallel with the primary compensation capacitor.

12. The device according to claim 10, wherein the primary circuit box further comprises a primary compensation capacitor, and the primary inductor of the transformer is coupled in parallel with the primary compensation capacitor.

13. The device according to claim 10, wherein the first switch unit comprises at least one bridge arm comprising two switches coupled in series, and the second switch unit comprises at least one bridge arm comprising two switches coupled in series.

14. The device according to claim 13, wherein each of the switches is a MOSFET or an IGBT or a diode.

15. The device according to claim 11, wherein the primary compensation capacitor of the transmission plate and the secondary compensation capacitor of the receiving plate respectively comprise a plurality of capacitors coupled in series.

16. The device according to claim 10, wherein the secondary inductor and the secondary compensation capacitor of the receiving plate consist of a plurality of units coupled in series, and each of the units comprises an inductor and a capacitor coupled in series.

17. The device according to claim 10, wherein the primary circuit box or the secondary circuit box further comprises an LC circuit network which comprises an inductor and a capacitor.