POWER RECEIVER, WIRELESS POWER SYSTEM AND RELATED METHOD OF TRANSMITTING INFORMATION WITH A POWER RECEIVER
First Claim
1. A power receiver, comprising:
- a resonant circuit having a pair of supply terminals between which an internal supply voltage of the power receiver is made available, comprising;
a secondary coil configured to be magnetically coupled with a primary coil of a power transmitter,a first resonance capacitance coupled in series with said secondary coil (LS), anda second resonance capacitance coupled between said pair of supply terminals;
a voltage rectification circuit configured to receive said internal supply voltage and to generate a corresponding rectified voltage;
a voltage regulator configured to receive said rectified voltage and further receive a modulation signal and to generate a corresponding regulated voltage;
a controlled voltage-to-current converter configured to receive said regulated voltage and further receive said modulation signal and adapted to deliver through an output line of the power receiver an output current having a DC value corresponding to the DC value of said regulated voltage and having an AC value corresponding to said modulation signal.
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Accused Products
Abstract
A power receiver includes a resonant circuit generating an internal supply voltage. A voltage rectification circuit receives the internal supply voltage and generate a corresponding rectified voltage. A voltage regulator receives the rectified voltage and a modulation signal and is configured to generate a corresponding regulated voltage. A controlled voltage-to-current converter receives the regulated voltage and the modulation signal. The converter operates to deliver, through an output line of the power receiver, an output current having a DC value corresponding to the DC value of said regulated voltage and having an AC value corresponding to said modulation signal.
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Citations
11 Claims
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1. A power receiver, comprising:
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a resonant circuit having a pair of supply terminals between which an internal supply voltage of the power receiver is made available, comprising; a secondary coil configured to be magnetically coupled with a primary coil of a power transmitter, a first resonance capacitance coupled in series with said secondary coil (LS), and a second resonance capacitance coupled between said pair of supply terminals; a voltage rectification circuit configured to receive said internal supply voltage and to generate a corresponding rectified voltage; a voltage regulator configured to receive said rectified voltage and further receive a modulation signal and to generate a corresponding regulated voltage; a controlled voltage-to-current converter configured to receive said regulated voltage and further receive said modulation signal and adapted to deliver through an output line of the power receiver an output current having a DC value corresponding to the DC value of said regulated voltage and having an AC value corresponding to said modulation signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A wireless power transfer system, comprising:
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a power transmitter having a primary coil; and a power receiver comprising; a resonant circuit having a pair of supply terminals between which an internal supply voltage of the power receiver is made available, comprising; a secondary coil configured to be magnetically coupled with a primary coil of a power transmitter, a first resonance capacitance coupled in series with said secondary coil (LS), and a second resonance capacitance coupled between said pair of supply terminals; a voltage rectification circuit configured to receive said internal supply voltage and to generate a corresponding rectified voltage; a voltage regulator configured to receive said rectified voltage and further receive a modulation signal and to generate a corresponding regulated voltage; a controlled voltage-to-current converter configured to receive said regulated voltage and further receive said modulation signal and adapted to deliver through an output line of the power receiver an output current having a DC value corresponding to the DC value of said regulated voltage and having an AC value corresponding to said modulation signal; wherein the secondary coil is magnetically coupled with said primary coil.
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10. A method of transmitting information contained in a modulation signal about a functioning state of a powered load, comprising:
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generating a regulated voltage with a voltage regulator; and generating with a controlled voltage-to-current converter an output current having a DC value corresponding to the DC value of said regulated voltage and having an AC value corresponding to said modulation signal; wherein generating the regulated voltage comprises adjusting a functioning point of the voltage regulator for generating said regulated voltage as the sum of a nominal constant voltage and of an AC voltage corresponding to said modulation signal; wherein generating the output current comprises controlling said voltage-to-current converter with a fixed voltage for delivering through an output line the output current having an AC value corresponding to an AC value of said regulated voltage.
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11. A method of transmitting information contained in a modulation signal about a functioning state of a powered load, comprising:
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generating a regulated voltage with a voltage regulator; and generating with a controlled voltage-to-current converter an output current having a DC value corresponding to the DC value of said regulated voltage and having an AC value corresponding to said modulation signal; wherein generating the regulated voltage comprises adjusting the functioning point of the voltage regulator for keeping said regulated voltage at a nominal constant voltage; wherein generating the output current comprises controlling said controlled voltage-to-current converter with said modulation signal for delivering through an output line the output current having an AC value corresponding to an AC value of said regulated voltage.
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Specification