Methods and systems for providing a ballast load for a magnetic resonant power supply
First Claim
1. A magnetic resonance power source comprising:
- a source coil;
a load-detection module;
a tunable ballast coil circuit;
a proximity sensor;
a drive circuit and a ping circuit;
a ping circuit; and
a controller programmed to carry out a set of functions comprising;
obtaining, via the load-detection module, an estimated load on the source coil;
decreasing a power received by the tunable ballast coil circuit from the source coil when the estimated load on the source coil is greater than a desired load on the source coil;
increasing the power received by the tunable ballast coil circuit from the source coil when the estimated load on the source coil is less than the desired load on the source coil;
using the drive circuit to cause the source coil to produce a magnetic field that resonates at a first frequency;
using the proximity sensor to detect devices to be charged by using the source coil to send and receive proximity pings;
wherein using the source coil to send proximity pings includes using the ping circuit to cause the source coil to produce a magnetic field that resonates at a second frequency, wherein the second frequency is greater than the first frequency, andwherein using the source coil to receive proximity pings includes using the ping circuit to receive proximity pings via the source coil at the second frequency.
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Accused Products
Abstract
Disclosed herein are methods and systems for providing a ballast load for a magnetic resonance power source. One embodiment takes the form of a magnetic resonance power source that includes a source coil, a load-detection module, a tunable ballast coil circuit, and a controller programmed to carry out a set of functions. The set of functions includes obtaining, via the load-detection module, an estimated load on the source coil. The set of functions also includes decreasing the power received by the tunable ballast coil circuit from the source coil when the estimated load on the source coil is greater than a desired load on the source coil. The set of functions also includes increasing the power received by the tunable ballast coil circuit from the source coil when the estimated load on the source coil is less than the desired load on the source coil.
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Citations
15 Claims
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1. A magnetic resonance power source comprising:
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a source coil; a load-detection module; a tunable ballast coil circuit; a proximity sensor; a drive circuit and a ping circuit; a ping circuit; and a controller programmed to carry out a set of functions comprising; obtaining, via the load-detection module, an estimated load on the source coil; decreasing a power received by the tunable ballast coil circuit from the source coil when the estimated load on the source coil is greater than a desired load on the source coil; increasing the power received by the tunable ballast coil circuit from the source coil when the estimated load on the source coil is less than the desired load on the source coil; using the drive circuit to cause the source coil to produce a magnetic field that resonates at a first frequency; using the proximity sensor to detect devices to be charged by using the source coil to send and receive proximity pings; wherein using the source coil to send proximity pings includes using the ping circuit to cause the source coil to produce a magnetic field that resonates at a second frequency, wherein the second frequency is greater than the first frequency, and wherein using the source coil to receive proximity pings includes using the ping circuit to receive proximity pings via the source coil at the second frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification