Method and Apparatus of Load Detection for a Planar Wireless Power System
First Claim
1. A method of determining information regarding a load for a planar wireless power transfer system, comprising:
- driving a transmitter coil of a planar wireless power transfer system with a drive amplifier;
measuring a transmitter coil voltage provided to the transmitter coil by the drive amplifier; and
determining information regarding a load positioned proximate the transmitter coil.
1 Assignment
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Accused Products
Abstract
Embodiments of the subject invention relate to a method and apparatus for determining information regarding a load in a planar wireless power transfer system by extracting system operating parameters from one or more test points in the transmitter circuit. As shown in FIG. 1, a specific embodiment showing three test points in the transmitter circuit from which operating parameters can be extracted. The transmitter circuit is designed to produce a magnetic field, by driving the transmitter coil, which inductively couples to a receiver coil such that power is provided to a receiver. By extracting operating parameters from the transmitter circuit, the receiver does not need to incorporate sophisticated signal processing and can be manufactured with low cost.
200 Citations
44 Claims
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1. A method of determining information regarding a load for a planar wireless power transfer system, comprising:
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driving a transmitter coil of a planar wireless power transfer system with a drive amplifier; measuring a transmitter coil voltage provided to the transmitter coil by the drive amplifier; and determining information regarding a load positioned proximate the transmitter coil. - View Dependent Claims (3, 5, 7, 8, 9, 10, 11, 12, 13, 24, 25, 26, 27, 29, 30, 31, 33, 35, 37, 39, 41, 43)
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2. A method of determining information regarding a load for planar wireless power transfer system, comprising:
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driving a transmitter coil of a planar wireless power transfer system with a drive amplifier; measuring a transmitter coil current passing through the transmitter coil; and determining information regarding a load positioned proximate the transmitter coil. - View Dependent Claims (4, 6, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 28, 32, 34, 36, 38, 40, 42, 44)
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Specification