Wireless power transfer and rapid charging system and method with maximum power tracking
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United States of America Patent
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Feb 28, 2017
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app pub date -
May 15, 2015
filing date -
May 15, 2015
priority date (Note) -
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Abstract
A wireless power transfer and rapid charging system with maximum power tracking and a method for the same are revealed. The system includes a transmitter device and a receiver device. First the transmitter device performs maximum power tracking and outputs a fixed resonant frequency. Now the receiver device charges a battery. A voltage detection circuit of the receiver device is detecting charging state of the battery. A high-frequency receiving circuit of the transmitter device checks whether a high-frequency transmission circuit transmits a fully-charged signal. When the high-frequency receiving circuit of the transmitter device receives the fully-charged signal that represents the battery is fully charged, the transmitter device shuts down the power and enters standby mode. Thereby wireless charging can be carried out in different environments. The greater transfer distances, lower output impedance, and higher wireless transmission efficiency can be achieved. The speed of wireless charging is also increased.
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