Wired-wireless combined power transmission apparatus and the method using the same

• US 9,484,147 B2
• Filed: 03/15/2013
• Issued: 11/01/2016
• Est. Priority Date: 10/04/2012
• Status: Expired due to Fees

• Current Assignee: Nera Innovations Limited (Atlantic IP Services Limited)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Cho, Shin
• Primary Examiner(s): BARNIE, REXFORD N
• Assistant Examiner(s): Inge, Joseph
• Application Number:
  US13/840,218
• Publication Number:
  US 20140097697A1
• Time in Patent Office: 1,327 Days
• Field of Search: 307/104
• US Class Current: 1/1
• 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 DC signal;

a wireless power transmission unit, to wirelessly transmit power, to a wireless power receiver; and

a wired power supply unit, to supply power through a cable, to a wired power receiver,

wherein the transformer unit includes;

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

a switching device controlling an operation of the transformer,

an output filter filtering an output of the transformer,

a primary inductor receiving the DC signal, and

a secondary inductor electrically connected to the primary inductor, wherein the secondary inductor includes a first secondary inductor and a second secondary inductor, and

wherein the output filter includes;

a first output filter filtering a first transformed DC signal received from the first secondary inductor and outputting a first filtered output signal to the wireless power transmission unit, and

a second output filter filtering a second transformed DC signal received from the second secondary inductor and outputting a second filtered output signal to the wired power supply unit.

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

an inverter receiving the first filtered output signal from the transformer unit to convert the first filtered output signal into a second AC signal; and

a transmission coil transmitting the second AC signal, which has been received from the inverter, to the wireless power receiver 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 the 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 further includes at least two of the secondary inductors.

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

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

12. 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 DC signal, to transform a size of the DC signal into a predetermined size;

transmitting wirelessly power to a wireless power receiver; and

supplying power to a wired power receiver,

wherein the receiving the DC signal comprises;

receiving the DC signal, by a primary inductor;

receiving the DC signal from the primary inductor, by a first secondary inductor of a secondary inductor electrically connected to the primary inductor;

filtering a first transformed DC signal from the first secondary inductor, by a first output filter;

outputting a first filtered output signal from the first output filter to the wireless power transmission unit;

receiving the DC signal from the primary inductor, by a second secondary inductor of a secondary inductor electrically connected to the primary inductor;

filtering a second transformed DC signal from the second secondary inductor, by a second output filter; and

outputting a second filtered output signal from the second output filter to the wired power receiver.

13. The wired-wireless combined power transmission method of claim 12, wherein the transforming of the size of the DC signal, which has been converted into the DC signal, into the predetermined size comprises:

receiving the DC signal and transforming the DC signal into a plurality of output voltages different from each other; and

filtering the output voltages to be output.

14. The wired-wireless combined power transmission method of claim 12, wherein, in the transmitting wirelessly power to a wireless power receiver, the power is wirelessly transmitted according to electromagnetic induction through a transmission coil.

15. The wired-wireless combined power transmission method of claim 13, wherein, in the transmitting wirelessly power to a wireless power receiver, if a plurality of transmission coils are provided, the power is simultaneously transmitted to a plurality of power receivers wirelessly through the transmission coils.

16. The wired-wireless combined power transmission method of claim 13, wherein the wired-wireless combined power transmission apparatus includes a transmission resonance coil electrically connected to a transmission coil, and, in the transmitting wirelessly power to a wireless power receiver, the power is wirelessly transmitted according to electrical resonance through the resonance coil.

17. The wired-wireless combined power transmission method of claim 12, further comprising removing an electromagnetic interference (EMI) noise by filtering the AC input signal before converting the AC input signal.