WIRED-WIRELESS COMBINED POWER TRANSMISSION APPARATUS AND THE METHOD USING THE SAME

• US 20140097697A1
• Filed: 03/15/2013
• Published: 04/10/2014
• Est. Priority Date: 10/04/2012
• Status: Active Grant

• Current Assignee: Nera Innovations Limited (Atlantic IP Services Limited)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: CHO, Shin
• Granted Patent: US 9,484,147 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: G06F 1/26 Power supply means, e.g. regulation thereof for memories G11C
• CPC Class Codes: G06F 1/263 Arrangements for using multiple switchable power supplies, e.g. battery and AC G06F1/30 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 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• 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

Disclosed are a wired-wireless combined power transmission apparatus and a method using the same. The wired-wireless combined power transmission apparatus includes a rectifying unit converting an AC input signal into a DC signal, a transformer unit transforming a size of the input signal, which has been converted into the DC signal, into a predetermined size, a wireless power transmission unit receiving the signal transformed by the transformer unit to wirelessly transmit power, and a wired power supply unit receiving the signal transformed by the transformer unit to supply power through a cable. The advantages and disadvantages of the wired power transmission apparatus and the wireless power transmission apparatus are supplemented to each other, so that the power conversion efficiency and the versatility are improved.

Claims

1. A wired-wireless combined power transmission apparatus comprising:

a rectifying unit converting an AC input signal into a DC signal;

a transformer unit transforming a size of the input signal, which has been converted into the DC signal, into a predetermined size;

a wireless power transmission unit receiving the input signal, which has been transformed by the transform unit, to wirelessly transmit power; and

a wired power supply unit receiving the input signal, which has been transformed by the transform unit, to supply power through a cable.

2. The wired-wireless combined power transmission apparatus of claim 1, wherein the wireless power transmission unit includes:

an inverter receiving the DC signal from the transformer unit to convert the DC signal into an AC signal; and

a transmission coil transmitting the AC signal, which has been received from the inverter, to a wireless power transmitter through electromagnetic induction.

3. The wired-wireless combined power transmission apparatus of claim 2, wherein the wireless power transmission unit further includes a plurality of transmission coils, and the power is simultaneously supplied to a plurality of wireless power receivers through the transmission coils in wireless.

4. The wired-wireless combined power transmission apparatus of claim 2, wherein the wireless power transmission unit further includes:

a plurality of transmission coils; and

a sensor detecting a position of a wireless power receiver if the wireless power receiver is located within a specific range of a top surface of the transmission coils.

5. The wired-wireless combined power transmission apparatus of claim 2, further comprising a wireless transceiver controller controlling wireless power transmission by detecting a signal from a wireless power receiver.

6. The wired-wireless combined power transmission apparatus of claim 2, further comprising a transmission resonance coil electrically connected to the transmission coil.

7. The wired-wireless combined power transmission apparatus of claim 1, wherein the wired power supply unit includes a connector connected to a cable for connection with a wired power receiver.

8. The wired-wireless combined power transmission apparatus of claim 7, wherein the connector includes a USB port.

9. The wired-wireless combined power transmission apparatus of claim 1, wherein the transformer unit includes:

a transformer transforming the size of the signal, which has been converted into the DC signal, into the predetermined size;

a switching device controlling an operation of the transformer; and

an output filter filtering an output of the transformer.

10. The wired-wireless combined power transmission apparatus of claim 9, wherein the transformer includes:

a primary inductor receiving a signal which has been converted in the rectifying unit; and

a secondary inductor electrically connected to the primary inductor, and

wherein the secondary inductor includes a first secondary inductor and a second secondary inductor.

11. The wired-wireless combined power transmission apparatus of claim 10, wherein the output filter includes:

a first output filter filtering an output signal received therein from the first secondary inductor and outputting the output signal to the wireless power transmission unit; and

a second output filter filtering an output signal received therein from the second secondary inductor and outputting the output signal to the wired power supply unit.

12. The wired-wireless combined power transmission apparatus of claim 9, wherein the transformer includes:

a primary inductor receiving a signal which has been converted in the rectifying unit; and

a secondary inductor electrically connected to the primary inductor, and

wherein at least two secondary inductors are provided.

13. The wired-wireless combined power transmission apparatus of claim 1, wherein the transformer unit includes a flyback DC-DC converter.

14. The wired-wireless combined power transmission apparatus of claim 1, further comprising a filter unit filtering the AC input signal and outputting the AC input signal to the rectifying unit.

15. A wired-wireless combined power transmission method in a wired-wireless combined power transmission apparatus, comprising:

converting an AC input signal into a DC signal;

receiving the signal, which has been converted into the DC signal, to transform a size of the signal into a predetermined size;

receiving the signal having the transformed size to wirelessly transmit power; and

receiving the signal having the transformed size to supply power through a cable.

16. The wired-wireless combined power transmission method of claim 15, wherein the transforming of the size of the signal, which has been converted into the DC signal, into the predetermined size comprises:

receiving the signal, which has been converted into the DC signal, and transforming the signal into a plurality of output voltages different from each other; and

filtering the output voltages to be output.

17. The wired-wireless combined power transmission method of claim 15, wherein, in the receiving the signal having the transformed size to wirelessly transmit power, the power is wirelessly transmitted according to electromagnetic induction through a transmission coil.

18. The wired-wireless combined power transmission method of claim 16, wherein, in the receiving the signal having the transformed size to wirelessly transmit power, if a plurality of transmission coils are provided, the power is simultaneously transmitted to a plurality of power receivers in wireless through the transmission coils.

19. The wired-wireless combined power transmission method of claim 16, wherein the wired-wireless combined power transmission apparatus includes a transmission resonance coil electrically connected to a transmission coil, and, in the receiving the signal having the transformed size to wirelessly transmit power, the power is wirelessly transmitted according to electrical resonance through the resonance coil.

20. The wired-wireless combined power transmission method of claim 15, further comprising removing an electromagnetic interference (EMI) noise by filtering the input AC signal before converting the input AC signal.