Power supply apparatus and power control method thereof
First Claim
Patent Images
1. A power supply apparatus of a wireless power transmitting apparatus wirelessly transmitting power to a wireless power receiving apparatus, the power supply apparatus comprising:
- a power supply to supply DC power;
an oscillator to generate an AC signal having a predetermined frequency;
an AC power generator to generate AC power using the AC signal and the DC power; and
a current sensor to measure current flowing through the power supply apparatus,wherein the current flowing through the power supply apparatus is one of current applied to the AC power generator and current output from the AC power generator, andwherein the power supply apparatus controls an operating time of the AC power generator according to variation of the measured current flowing to adjust the power supplied to the wireless power transmitting apparatus when the measured intensity of current is equal to or higher than a threshold value that is a minimum current value sufficient for detecting the wireless power receiving apparatus,wherein the AC power generator comprises;
a first MOSFET;
a second MOSFET; and
a driver applying AC signals having a same amplitude and opposite phases to the first MOSFET and the second MOSFET, respectively,wherein the driver adjusts a time during which the AC signal of a low level is applied to both of the first MOSFET and the second MOSFET,wherein the power supply apparatus increases the time during which the AC signal of the low level is applied to both of the first MOSFET and the second MOSFET when the measured intensity of current is increased,wherein, when the intensity of current is rapidly increased, an interval of the time is adjusted corresponding to the intensity of the current rapidly increasing,wherein, when the intensity of current is slowly increased, the interval of the time is adjusted corresponding to the intensity of the current slowly increasing;
wherein the power supply apparatus reduces the time during which the AC signal of the low level is applied to both of the first MOSFET and the second MOSFET when the measured intensity of current is reduced, andwherein, when the intensity of current is rapidly reduced, the interval of the time is adjusted corresponding to the intensity of the current rapidly reducing.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed is a power supply apparatus of a wireless power transmitting apparatus wirelessly transmitting power to a wireless power receiving apparatus. The power supply apparatus includes a power supply to supply DC power, an oscillator to generate an AC signal having a predetermined frequency and an AC power generator to generate AC power using the AC signal and the DC power. The power supply apparatus controls an operating time of the AC power generator to adjust the power supplied to the wireless power transmitting apparatus.
5 Citations
7 Claims
-
1. A power supply apparatus of a wireless power transmitting apparatus wirelessly transmitting power to a wireless power receiving apparatus, the power supply apparatus comprising:
-
a power supply to supply DC power; an oscillator to generate an AC signal having a predetermined frequency; an AC power generator to generate AC power using the AC signal and the DC power; and a current sensor to measure current flowing through the power supply apparatus, wherein the current flowing through the power supply apparatus is one of current applied to the AC power generator and current output from the AC power generator, and wherein the power supply apparatus controls an operating time of the AC power generator according to variation of the measured current flowing to adjust the power supplied to the wireless power transmitting apparatus when the measured intensity of current is equal to or higher than a threshold value that is a minimum current value sufficient for detecting the wireless power receiving apparatus, wherein the AC power generator comprises; a first MOSFET; a second MOSFET; and a driver applying AC signals having a same amplitude and opposite phases to the first MOSFET and the second MOSFET, respectively, wherein the driver adjusts a time during which the AC signal of a low level is applied to both of the first MOSFET and the second MOSFET, wherein the power supply apparatus increases the time during which the AC signal of the low level is applied to both of the first MOSFET and the second MOSFET when the measured intensity of current is increased, wherein, when the intensity of current is rapidly increased, an interval of the time is adjusted corresponding to the intensity of the current rapidly increasing, wherein, when the intensity of current is slowly increased, the interval of the time is adjusted corresponding to the intensity of the current slowly increasing; wherein the power supply apparatus reduces the time during which the AC signal of the low level is applied to both of the first MOSFET and the second MOSFET when the measured intensity of current is reduced, and wherein, when the intensity of current is rapidly reduced, the interval of the time is adjusted corresponding to the intensity of the current rapidly reducing. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeLG Innotek Company Limited (LG Corporation)
-
Original AssigneeLG Innotek Company Limited (LG Corporation)
-
InventorsBae, Su Ho
-
Primary Examiner(s)Fleming, Fritz M
-
Application NumberUS13/902,141Publication NumberTime in Patent Office1,586 DaysField of SearchUS Class CurrentCPC Class CodesH01F 38/14 Inductive couplings for wir...H02J 50/12 of the resonant typeH02J 50/80 involving the exchange of d...H02J 50/90 involving detection or opti...
