Resonant wireless charging system and method for electric toothbrush
First Claim
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1. A system for charging one or more electric devices, the system comprising:
- a charging station comprising;
an input node configured to receive a power input;
a boost converter coupled to the input node and configured to step up the power input to a boosted voltage level;
a sensing circuit coupled to the boost converter and configured to detect an electronic device at a receiver side after the power input has been stepped up by the boost converter;
a power amplifier coupled to the sensing circuit, and a switch coupled to the power amplifier to turn on and off the power amplifier intermittently to allow a detection of the electronic device at the receiver side, wherein the boost converter is configured to provide a range of DC voltage to the power amplifier, and the electronic device is detected by the sensing circuit; and
a transmitter resonant circuit coupled to the power amplifier and including a transmitter coupling coil configured to oscillate at a resonant frequency; and
the one or more electric devices to be placed at the receiver side, comprising;
a receiver resonant circuit including a receiver coupling coil configured to be wirelessly coupled to the transmitter coupling coil; and
a DC voltage charger configured to charge one or more batteries in the electric device.
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Abstract
A system for wireless electrical charging is disclosed. The system may comprise a charging station and one or more electric devices. The charging station may comprise an input node configured to receive a power input, and a transmitter resonant circuit including a transmitter coupling coil configured to oscillate at a resonant frequency. The one or more electric devices may comprise a receiver resonant circuit including a receiver coupling coil wirelessly coupled to the transmitter coupling coil, and a DC voltage charger configured to charge one or more batteries in the electric device.
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Citations
16 Claims
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1. A system for charging one or more electric devices, the system comprising:
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a charging station comprising; an input node configured to receive a power input; a boost converter coupled to the input node and configured to step up the power input to a boosted voltage level; a sensing circuit coupled to the boost converter and configured to detect an electronic device at a receiver side after the power input has been stepped up by the boost converter; a power amplifier coupled to the sensing circuit, and a switch coupled to the power amplifier to turn on and off the power amplifier intermittently to allow a detection of the electronic device at the receiver side, wherein the boost converter is configured to provide a range of DC voltage to the power amplifier, and the electronic device is detected by the sensing circuit; and a transmitter resonant circuit coupled to the power amplifier and including a transmitter coupling coil configured to oscillate at a resonant frequency; and the one or more electric devices to be placed at the receiver side, comprising; a receiver resonant circuit including a receiver coupling coil configured to be wirelessly coupled to the transmitter coupling coil; and a DC voltage charger configured to charge one or more batteries in the electric device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for charging one or more electric devices, the method comprising:
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receiving a power input by a charging station; stepping up, by a boost converter, the power input to a boosted voltage; amplifying the boosted voltage through a power amplifier, wherein the boost converter is configured to provide a range of DC voltage to the power amplifier; turning on and off the power amplifier intermittently to allow a detection of an electronic device at a receiver side, wherein the electronic device is detected by a sensing circuit; if one or more electronic device is detected at the receiver side, oscillating a transmitter resonant circuit of the charging station at a resonant frequency; and wirelessly coupling the transmitter resonant circuit to a receiver resonant circuit of the one or more electric devices. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification