Tunable wireless power architectures
First Claim
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1. A wireless energy receiving device for wirelessly receiving energy to drive a load, comprising:
- a device resonator;
a rectifier electrically coupled to a load and to the device resonator, the rectifier comprising controllable switching elements; and
a controller coupled to the rectifier,wherein the controller is configured to control the switching elements of the rectifier to adjust an output voltage, current, or power presented to the load; and
wherein in a first mode of operation of the system, the controller is configured so that, to approximately maintain the output voltage, current, or power presented to the load despite changes in power delivered to the device resonator by a source resonator, the controller changes a duty cycle or a phase of the switching elements of the rectifier to cause the output voltage, current, or power presented to the load to approach a target voltage demand, current demand, or power demand associated with the load.
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Abstract
Described herein are improved configurations for a wireless power transfer. The parameters of components of the wireless energy transfer system are adjusted to control the power delivered to the load at the device. The power output of the source amplifier is controlled to maintain a substantially 50% duty cycle at the rectifier of the device.
695 Citations
21 Claims
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1. A wireless energy receiving device for wirelessly receiving energy to drive a load, comprising:
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a device resonator; a rectifier electrically coupled to a load and to the device resonator, the rectifier comprising controllable switching elements; and a controller coupled to the rectifier, wherein the controller is configured to control the switching elements of the rectifier to adjust an output voltage, current, or power presented to the load; and wherein in a first mode of operation of the system, the controller is configured so that, to approximately maintain the output voltage, current, or power presented to the load despite changes in power delivered to the device resonator by a source resonator, the controller changes a duty cycle or a phase of the switching elements of the rectifier to cause the output voltage, current, or power presented to the load to approach a target voltage demand, current demand, or power demand associated with the load. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A wireless energy transfer system, comprising:
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a first resonator; a second resonator; a power supply; and a first plurality of switching elements connected to the power supply and to the first resonator; a second plurality of switching elements connected to a first load and to the second resonator; and a first controller connected to the first plurality of switching elements and communicatively coupled to a second controller connected to the second plurality of switching elements, wherein in a first mode of operation of the wireless energy transfer system; the power supply drives the first resonator through the first plurality of switching elements with an oscillating voltage signal; the first controller is configured to adjust a duty cycle or a phase of the first plurality of switching elements so that zero voltage switching is substantially maintained; and the first controller is configured to adjust an output power level of the oscillating voltage signal driving the first resonator in response to a change in a power demand by the first load when the first load receives power wirelessly from the first resonator, by adjusting at least one of the duty cycle of the first plurality of switching elements, the phase of the first plurality of switching elements, and a bus voltage of the first plurality of switching elements. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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Specification