WIRELESS CHARGING SYSTEM AND APPARATUS, AND CONTROL METHOD THEREOF
The invention provides a wireless charging system and a wireless charging apparatus for wirelessly charging a receiving device, and provides a method of controlling the wireless charging apparatus. The wireless charging apparatus comprises a power supply for providing a power voltage; a primary charging core; a switch module for changing the power voltage to an input voltage connected the power supply and the primary charging core so that the primary charging core has a primary current according to the power voltage supplied from the power supply; and a controller connected to the switch module and the primary charging core for measuring the primary current and for outputting a control signal for controlling the power voltage provided from the power supply.
1 . A wireless charging system, comprising:
a charging apparatus, comprising:
a power supply to supply a power voltage;
a switch module connected to the power supply to change the power voltage to an input voltage;
a primary charging core connected to the switch module and having a primary current according to the input voltage provided from the switch module; and
a controller connected to the switch module and the primary charging core, the controller is configured to measure the primary current and to output a control signal for controlling the power voltage provided from the power supply; and
a receiving device to be placed opposite to the charging apparatus to perform wireless charging, the receiving device comprising:
a secondary charging core to be placed opposite to the primary charging core to generate a secondary current in response to the primary current by inductive coupling effect;
a bridge rectifier connected to the secondary charging core to rectify the secondary current and to generate a DC voltage; and
a charge circuit connected to the bridge rectifier to receive the DC voltage for charging.
2 . The wireless charging system as claimed in claim 1 , wherein the primary charging core comprises a primary coil and a resistor connected in series to the primary coil.
3 . The wireless charging system as claimed in claim 2 , wherein the controller is configured to measure the primary current from the resistor.
4 . The wireless charging system as claimed in claim 2 , wherein the primary
charging core further comprises a primary capacitor connected in parallel to the primary coil.
5 . A wireless charging system, comprising:
a charging apparatus, comprising:
a power supply to supply a power voltage;
a switch module connected to the power supply to change the power voltage to an input voltage;
a primary charging core connected to the switch module and having a primary current according to the input voltage provided from the switch module; a compensation coil disposed on a side of the primary charging core; and
a controller connected to the switch module, the primary charging core and the compensation coil, the controller is configured to measure the primary current and to output a control signal for controlling a compensation current of the compensation coil; and
a receiving device to be placed opposite to the charging apparatus to perform wireless charging, the secondary receiving device comprising:
a secondary charging core to be placed opposite to the primary charging core to generate a secondary current in response to the primary current by inductive coupling effect;
a bridge rectifier connected to the secondary charging core to rectify the secondary current and to generate a DC voltage; and
a charge circuit connected to the bridge rectifier to receive the DC voltage for charging.
6 . The wireless charging system as claimed in claim 5 , wherein the primary charging core comprises a primary coil and a resistor connected in series to the primary coil.
7 . The wireless charging system as claimed in claim 6 , wherein the controller is configured to measure the primary current from the resistor.
8 . The wireless charging system as claimed in claim 5 claim 6 , wherein the primary
charging core further comprises a primary capacitor connected in parallel to the primary coil.
9 . A wireless charging apparatus for wirelessly charging a receiving device, comprising:
a power supply to supply a power voltage;
a switch module connected to the power supply to change the power voltage to an input voltage;
a primary charging core connected to the switch module and having a primary current according to the input voltage provided from the switch module; and
a controller connected to the switch module and the primary charging core, the controller is configured to measure the primary current and to output a control signal for controlling the power voltage provided from the power supply.
10 . The wireless charging apparatus as claimed in claim 9 , wherein the primary charging core comprises a primary coil and a resistor connected in series to the primary coil.
11 . The wireless charging apparatus as claimed in claim 10 , wherein the controller is configured to measure the primary inducing current from the resistor.
12 . The wireless charging apparatus as 1 claimed in claim 9 claim 10 , wherein the
primary charging core further comprises a primary capacitor connected in parallel to the primary coil.
13 . A wireless charging apparatus for wirelessly charging a receiving device,
comprising:
a power supply to supply a power voltage;
a switch module connected to the power supply to change the power voltage to an input voltage;
a primary charging core connected to the switch module and having a primary current according to the input voltage provided from the switch module;
a compensation coil disposed on a side of the primary charging core; and
a controller connected to the switch module, the primary charging core and the compensation coil, the controller is configured to measure the primary current and to output a control signal for controlling a compensation current of the compensation coil.
14 . The wireless charging apparatus as claimed in claim 13 , wherein the primary charging core comprises a primary coil and a resistor connected in series to the primary coil.
15 . The wireless charging system as claimed in claim 14 , wherein the controller is configured to measure the primary current from the resistor.
16 . The wireless charging system as claimed in claim 14 , wherein the primary
charging core further comprises a primary capacitor connected in parallel to the primary coil.
17 . A method of controlling a wireless 1 charging apparatus, comprising:
receiving a input voltage, wherein the input voltage is used for inputting to a primary charging core;
receiving a primary current of the primary charging core, wherein the primary current is configured to induce a receiving device by inductive coupling effect;
measuring the harmonic distortions of the primary current; and
outputting a control signal for controlling the provided input voltage to the primary charging core in response to the measured result.
18 . A method of controlling a wireless charging apparatus, comprising:
receiving a input voltage, wherein the input voltage is used for inputting to
a primary charging core;
receiving a primary current of the primary charging core, wherein the primary current is configured to induce a receiving device by inductive coupling effect;
measuring the harmonic distortions of the primary current; and
outputting a control signal for controlling a compensation current of the compensation coil in response to the measured result.