HIGH EFFICIENCY WIRELESS CHARGING SYSTEM AND ITS CONTROL METHOD
First Claim
1. A control method for a high efficiency wireless charging system, comprising the steps of:
- keeping a resonant frequency point of a wireless charging system in an operating frequency range of the wireless charging system by performing impedance matching on an antenna of the wireless charging system;
tracing an optimal frequency point by sending a sensing signal with a default transmission frequency, and calculating a transmission efficiency of the sensing signal;
determining whether the transmission efficiency meets a transmission requirement;
when the transmission efficiency does not meet the transmission requirement, repeats the previous steps with another default transmission frequency until the transmission efficiency meeting the transmission requirement;
when the transmission efficiency meeting the transmission requirement, the default transmission frequency is defined as the optimal frequency point;
setting the optimal frequency point as an operating frequency of the wireless charging system for charging.
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Abstract
A control method for a wireless charging system has steps of performing impedance matching on an antenna of the wireless charging system; tracing an optimal frequency point by sending a sensing signal with a default transmission frequency, and calculating a transmission efficiency of the sensing signal; determining whether the transmission efficiency meets a transmission requirement. When the transmission efficiency does not meet the transmission requirement, repeats the previous steps with another default transmission frequency until the transmission efficiency meeting the transmission requirement. When the transmission efficiency meeting the transmission requirement, the default transmission frequency is defined as the optimal frequency point for charging. Setting the optimal frequency point as an operating frequency of the wireless charging system for charging The optimal frequency point defined by the above steps can maintain high efficiency of the wireless charging system against the variable transmitting distances.
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Citations
20 Claims
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1. A control method for a high efficiency wireless charging system, comprising the steps of:
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keeping a resonant frequency point of a wireless charging system in an operating frequency range of the wireless charging system by performing impedance matching on an antenna of the wireless charging system; tracing an optimal frequency point by sending a sensing signal with a default transmission frequency, and calculating a transmission efficiency of the sensing signal; determining whether the transmission efficiency meets a transmission requirement;
when the transmission efficiency does not meet the transmission requirement, repeats the previous steps with another default transmission frequency until the transmission efficiency meeting the transmission requirement;when the transmission efficiency meeting the transmission requirement, the default transmission frequency is defined as the optimal frequency point; setting the optimal frequency point as an operating frequency of the wireless charging system for charging. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A high efficiency wireless charging system comprising:
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a wireless transmitter having a first controller; and a transmission circuit electrically connected to the first controller and having a first impedance matching unit having variable capacitance, wherein the capacitance of the first impedance matching unit is controlled by the first controller; and a transmission unit electrically connected to the first impedance matching unit; wherein after the first controller controls the capacitance of the first impedance matching unit, the first controller further executes a tracing process for an optimal frequency point; and a wireless receiver having a second controller; and a receiving circuit electrically connected to the second controller and having a second impedance matching unit having variable capacitance, wherein the capacitance of the second impedance matching unit is controlled by the second controller; and a receiving unit electrically connected to the second impedance matching unit; wherein after the second controller controls the capacitance of the second impedance matching unit, the second controller further executes the tracing process for the optimal frequency point. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification