Power supplying apparatus and wireless power transmitter

Patent metadata

Field	Value
Publication number	US-2016261144-A1
Application number	US-201314442208-A
Country	US
Kind code	A1
Filing date	Nov 11, 2013
Priority date	Nov 12, 2012
Publication date	Sep 8, 2016
Grant date	—

Abstract

A power supplying apparatus includes a power supply and an alternating current (AC) power generator. The power supply generates a direct current generator (DC) power. The alternating current (AC) power generator comprises an inductor configured to generate an AC power based on the DC power, wherein the AC power comprises a first AC power with a first AC voltage and a second AC power with a second AC voltage, and the first AC voltage and the second AC voltage have phases opposite to each other.

First claim

1 . A power supplying apparatus comprising:
a power supply configured to generate a direct current (DC) power; and an alternating current (AC) power generator comprising an inductor configured to generate an AC power based on the DC power, wherein the AC power comprises a first AC power with a first AC voltage and a second AC power with a second AC voltage, and the first AC voltage and the second AC voltage have phases opposite to each other.

2 . The power supplying apparatus of claim 1 , further comprising an oscillator configured to generate an AC signal to supply the AC signal to the AC power generator,
wherein the AC power generator generates the first AC power and the second AC power under the control of the AC signal.

3 . The power supplying apparatus of claim 1 , wherein, when one of the first and second AC voltages is at a high level, the other is at a low level.

4 . The power supplying apparatus of claim 1 , wherein the AC power generator further comprises a switching device connected to the inductor and switching-controlled in order to generate the first AC power and the second AC power.

5 . The power supplying apparatus of claim 4 , wherein the AC power generator further comprises an AC power controller configured to generate an AC power control signal based on the AC signal in order to control the switching device.

6 . The power supplying apparatus of claim 5 , wherein the inductor comprises first and second inductors connected to the power supply in parallel, and
the switching device comprises first and second switching devices connected to the first and second inductors, respectively.

7 . The power supplying apparatus of claim 6 , wherein the AC power control signal comprises first and second AC power control signals to be supplied to the first and second switching devices, respectively, and the first and second AC power control signals have phases opposite to each other.

8 . The power supplying apparatus of claim 7 , wherein the first AC power is generated by the first inductor under the switching control of the first switching device in response to the first AC power control signal.

9 . The power supplying apparatus of claim 7 , wherein the second AC power is generated by the second inductor under the switching control of the second switching device in response to the second AC power control signal.

10 . The power supplying apparatus of claim 6 , wherein the first and second inductor comprise coils, respectively.

11 . The power supplying apparatus of claim 10 , wherein a winding direction of the coil of the first inductor is opposite to a winding direction of the coil of the second inductor.

12 . The power supplying apparatus of claim 6 , wherein the first and second switching devices are commonly connected to a ground terminal.

13 . The power supplying apparatus of claim 6 , wherein the first and second switching devices are switching-controlled by a unit of a half period of the AC signal.

14 . A wireless power transmitter comprising:
a power supply configured to generate a direct current (DC) power; and an alternating current (AC) power generator comprising an inductor configured to generate an AC power based on the DC power; and a transmission coil configured to transmit the AC power to a wireless power receiver, wherein the AC power comprises a first AC power with a first AC voltage and a second AC power with a second AC voltage, and the first AC voltage and the second AC voltage have phases opposite to each other.

15 . The wireless power transmitter of claim 14 , wherein the transmission coil comprises a transmission resonant coil configured to transmit the AC power to the wireless power by using resonance.

16 . The wireless power transmitter of claim 14 , wherein the transmission coil comprises:
a transmission induction coil; and a transmission resonant coil configured to transmit the AC power from the transmission induction coil to the wireless power receiver.

17 . The wireless power transmitter of claim 16 , wherein the inductor comprises the transmission induction coil.

18 . The wireless power transmitter of claim 16 , wherein the transmission induction coil is spaced apart from the inductor.

19 . The wireless power transmitter of claim 16 wherein the transmission resonant coil generates the AC power, which is obtained by adding the first AC power to the second AC power, and an amplitude of an AC voltage of the AC power is greater than an amplitude of the first AC voltage of the first AC power or an amplitude of the second AC voltage of the second AC power

20 . The wireless power transmitter of claim 14 , wherein the inductor comprises a first inductor and a second inductor connected to the power supply in parallel, and
the AC power generator comprises: a first switching device connected to the first inductor and switching-controlled to allow the first inductor to generate the first AC power; and a second switching device connected to the second inductor and switching-controlled to allow the second inductor to generate the second AC power.

Assignees

• Lg Innotek Co Ltd

Inventors

• Bae Su Ho

Classifications

• H02J50/90

  involving detection or optimisation of position, e.g. alignment · CPC title

• H02J50/12 Primary

  of the resonant type · CPC title

• H02J7/025

  Electricity · mapped topic

• H02J50/402

  the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas · CPC title

• H02J50/80 Primary

  involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices · CPC title