Wireless power transfer system having wireless power transfer system-charger
First Claim
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1. A wireless power transfer system-charger comprising:
- a power supply;
a transformer unit for converting a voltage supplied by the power supply into a direct current (DC) voltage; and
a controller for adjusting a level of the DC voltage of the transformer unit,wherein the transformer unit includes a DC-DC converter and a control unit for receiving an output voltage of the DC-DC converter and adjusting the output voltage,wherein the control unit includes a divider for dividing the output voltage of the DC-DC converter,wherein the divider includes;
a first resistor connected to an output terminal of the DC-DC converter and a node; and
a second resistor connected between the node and the ground, andwherein the controller is connected to the node to adjust the divided voltage of the divider.
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Abstract
One embodiment of the present invention can provide: a wireless power transfer system which can reduce the error of the output voltage of a DC-DC transformer, and at the same time, change the magnitude of the output voltage according to the power transfer method and efficiency; and a wireless power transfer system which can variably control an output control port in a control part, and thus actively control the output of the DC-DC transformer regardless of the characteristics of the DC-DC transformer.
10 Citations
19 Claims
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1. A wireless power transfer system-charger comprising:
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a power supply; a transformer unit for converting a voltage supplied by the power supply into a direct current (DC) voltage; and a controller for adjusting a level of the DC voltage of the transformer unit, wherein the transformer unit includes a DC-DC converter and a control unit for receiving an output voltage of the DC-DC converter and adjusting the output voltage, wherein the control unit includes a divider for dividing the output voltage of the DC-DC converter, wherein the divider includes; a first resistor connected to an output terminal of the DC-DC converter and a node; and a second resistor connected between the node and the ground, and wherein the controller is connected to the node to adjust the divided voltage of the divider. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A wireless power transfer system comprising:
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a wireless power transfer system-charger; and a wireless power transfer system-device for receiving power from the wireless power transfer system-charger, wherein the wireless power transfer system-charger includes; a power supply; a transformer unit for converting a voltage supplied by the power supply into a direct current (DC) voltage; a controller for adjusting a level of the DC voltage of the transformer unit; a rectification and filtering unit for supplying a DC voltage to the transformer unit; a power converter for converting an output voltage of the transformer unit into an alternating current (AC) voltage; and a transmission-side matching unit for performing impedance matching between the wireless power transfer system-charger and the wireless power transfer system-device, wherein the transformer unit includes a DC-DC converter and a control unit for receiving an output voltage of the DC-DC converter and adjusting the output voltage, and wherein the control unit includes a divider for dividing the output voltage of the DC-DC converter, wherein the divider includes; a first resistor connected to an output terminal of the DC-DC converter and a node; and a second resistor connected between the node and the ground, and wherein the controller is connected to the node to adjust the divided voltage of the divider. - View Dependent Claims (19)
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Specification