SYSTEMS AND METHODS FOR BI-STATE IMPEDANCE CONVERSION IN WIRELESS POWER TRANSFER
First Claim
1. A wireless power transmitter comprising:
- a transmit antenna configured to generate a field for wireless transmit power in both a first and second configuration;
a first capacitor;
at least one switch configured to selectively connect the first capacitor in one of the first and second configuration, the first capacitor being in parallel with the transmit antenna in the first configuration and in series with the transmit antenna in the second configuration;
a second capacitor in parallel with the transmit antenna; and
a transformer configured to operate at a first turns-ratio in the first configuration and a second turns-ratio in the second configuration, the first turns-ratio being lower than the second turns-ratio.
2 Assignments
0 Petitions
Accused Products
Abstract
One aspect provides a wireless power transmitter. The wireless power transmitter includes a transmit antenna configured to generate a field for wireless transmit power in both a first and second configuration. The wireless power transmitter further includes a first capacitor. The wireless power transmitter further includes at least one switch configured to selectively connect the first capacitor in one of the first and second configuration, the first capacitor being in parallel with the transmit antenna in the first configuration and in series with the transmit antenna in the second configuration. The wireless power transmitter further includes a second capacitor in parallel with the transmit antenna and a transformer configured to operate at a first turns-ratio in the first configuration and a second turns-ratio in the second configuration, the first turns-ratio being lower than the second turns-ratio.
8 Citations
30 Claims
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1. A wireless power transmitter comprising:
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a transmit antenna configured to generate a field for wireless transmit power in both a first and second configuration; a first capacitor; at least one switch configured to selectively connect the first capacitor in one of the first and second configuration, the first capacitor being in parallel with the transmit antenna in the first configuration and in series with the transmit antenna in the second configuration; a second capacitor in parallel with the transmit antenna; and a transformer configured to operate at a first turns-ratio in the first configuration and a second turns-ratio in the second configuration, the first turns-ratio being lower than the second turns-ratio. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising of transmitting wireless charging power in a wireless power transmitter, comprising:
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generating, at a transmit antenna, a field for wireless transmit power in both a first and second configuration; selectively connecting a first capacitor in one of the first and second configuration, the first capacitor being in parallel with the transmit antenna in the first configuration and in series with the transmit antenna in the second configuration; connecting the first capacitor in series with a second capacitor in the first configuration and in parallel with the second capacitor in the second configuration, the second capacitor in parallel with the transmit antenna; and configuring a transformer to operate at a first turns-ratio in the first configuration and a second turns-ratio in the second configuration, the first turns-ratio being higher than the second turns-ratio. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An apparatus for transmitting wireless charging power, comprising:
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a first capacitor; means for generating a field for wireless transmit power in both a first and second configuration; a second capacitor in parallel with the means for generating the field; means for selectively connecting the first capacitor in one of the first and second configuration, the first capacitor being in parallel with the means for generating in the first configuration and in series with the means for generating in the second configuration; means for operating at a first turns-ratio in the first configuration and a second turns-ratio in the second configuration, the first turns-ratio being higher than the second turns-ratio. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. A non-transitory computer-readable medium comprising code that, when executed, causes an apparatus to:
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generate, at a transmit antenna, a field for wireless transmit power in both a first and second configuration; selectively connect a first capacitor in one of the first and second configuration, the first capacitor being in parallel with the transmit antenna in the first configuration and in series with the transmit antenna in the second configuration, wherein the apparatus comprises a second capacitor in parallel with the transmit antenna; and configure a transformer to operate at a first turns-ratio in the first configuration and a second turns-ratio in the second configuration, the first turns-ratio being higher than the second turns-ratio. - View Dependent Claims (25, 26, 27, 28, 29, 30)
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Specification