SUPPRESSION OF AUDIBLE HARMONICS IN WIRELESS POWER RECEIVERS
First Claim
1. A wireless power enabled apparatus, comprising:
- a wireless power receiver, including;
a receive coil configured to generate an AC power signal responsive to a wireless power signal;
a rectifier configured to receive the AC power signal and generate a DC rectified power signal relative to a rectified ground;
a regulator operably coupled with the rectifier to receive the DC rectified power signal and generate an output voltage; and
a damping circuit operably coupled between the DC rectified power signal and the rectified ground and in parallel with the regulator, the damping circuit configured to suppress audible harmonics generated by the wireless power receiver at some loads by providing a damping impedance for the DC rectified power signal.
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Accused Products
Abstract
A wireless power enabled apparatus includes a wireless power receiver. The wireless power receiver includes a receive coil, a rectifier, a regulator, and a damping circuit. The receive coil is configured to generate an AC power signal responsive to a wireless power signal. The rectifier is configured to receive the AC power signal and generate a DC rectified power signal relative to a rectified ground signal. The regulator is operably coupled with the rectifier to receive the DC rectified power signal and generate an output voltage. The damping circuit is operably coupled between the DC rectified power signal and the rectified ground signal and in parallel with the regulator. The damping circuit is configured to suppress audible harmonics generated by the wireless power receiver at some loads by providing a damping impedance for the DC rectified power signal.
48 Citations
20 Claims
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1. A wireless power enabled apparatus, comprising:
a wireless power receiver, including; a receive coil configured to generate an AC power signal responsive to a wireless power signal; a rectifier configured to receive the AC power signal and generate a DC rectified power signal relative to a rectified ground; a regulator operably coupled with the rectifier to receive the DC rectified power signal and generate an output voltage; and a damping circuit operably coupled between the DC rectified power signal and the rectified ground and in parallel with the regulator, the damping circuit configured to suppress audible harmonics generated by the wireless power receiver at some loads by providing a damping impedance for the DC rectified power signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A wireless power receiver, comprising:
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a receive coil configured to generate an AC power signal at a resonant frequency responsive to a wireless power signal; a rectifier configured to receive the AC power signal and generate a rectified voltage and a rectified ground in response thereto; a regulator configured to receive the rectified voltage and generate an output voltage in response thereto; and a damping circuit operably coupled between the rectified voltage and the rectified ground, the damping circuit configured to suppress sideband frequencies relative to the resonant frequency wherein the sideband frequencies generate audible harmonics at some loads on the regulator when the sideband frequencies are not suppressed. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method of operating a receiver side of a wireless power transfer system, the method comprising:
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generating an AC power signal responsive to a wireless power signal exciting a receive coil at a resonant frequency; rectifying the AC power signal to generate a DC rectified power signal and a rectified ground; generating an output voltage from the DC rectified power signal with a voltage regulator; and suppressing sideband frequencies relative to the resonant frequency by providing a damping impedance between the DC rectified power signal and the rectified ground the damping impedance, wherein the sideband frequencies generate audible harmonics at some loads when the sideband frequencies are not suppressed. - View Dependent Claims (17, 18, 19, 20)
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Specification