Wireless Charging System and Method for Controlling the Same
First Claim
1. A wireless charging system for charging a rechargeable device, the wireless charging system comprising:
- a charging circuit;
a power supply module for providing a dc power signal on the charging circuit;
a power switching module electrically connected with the power supply module for converting the dc power signal into an AC power signal based on a switching frequency;
a power sensing terminal on the charging circuit for sensing a coupling voltage according to the AC power signal to charge the rechargeable device; and
a comparison module electrically connected with the power sensing terminal for comparing the coupling voltage with a default value, wherein the default value is set by the power switching module according to the switching frequency;
when the coupling voltage is less than the default value, the comparison module controls the power switching module to increase the switching frequency.
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Accused Products
Abstract
A wireless charging system and a method for controlling the wireless charging system are disclosed. The wireless charging system is used for charging a rechargeable device. The wireless charging system includes a charging circuit, a power supply module, a power switching module, a power sensing terminal, and a comparison module. The power supply module is used for providing a DC power signal. The power switching module converts the DC power signal to an AC power signal based on a switching frequency. The power sensing terminal is used for sensing a coupling voltage according to the AC power signal to charge the rechargeable device. The comparison module compares the coupling voltage with a default value, wherein the default value is set according to the switching frequency. When the coupling voltage is less than the default value, the comparison module controls the power switching module to increase the switching frequency.
5 Citations
14 Claims
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1. A wireless charging system for charging a rechargeable device, the wireless charging system comprising:
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a charging circuit; a power supply module for providing a dc power signal on the charging circuit; a power switching module electrically connected with the power supply module for converting the dc power signal into an AC power signal based on a switching frequency; a power sensing terminal on the charging circuit for sensing a coupling voltage according to the AC power signal to charge the rechargeable device; and a comparison module electrically connected with the power sensing terminal for comparing the coupling voltage with a default value, wherein the default value is set by the power switching module according to the switching frequency;
when the coupling voltage is less than the default value, the comparison module controls the power switching module to increase the switching frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for controlling a wireless charging system to charge a rechargeable device, the method comprising the following steps:
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providing a dc power signal; converting the dc power signal into an AC power signal based on a switching frequency; sensing a coupling voltage according to the AC power signal to charge the rechargeable device; comparing the coupling voltage with a default value, wherein the default value is set according to the switching frequency; and when the coupling voltage is less than the default value, increasing the switching frequency to increase the AC power signal. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification