METHODS AND DEVICES FOR CONTROLLING WIRELESS POWER TRANSFER LEVELS
First Claim
Patent Images
1. A device, comprising:
- a coil defining a coil axis;
a tank capacitor electrically coupled to the coil and wherein the coil and the tank capacitor define a resonant frequency;
a rectifier coupled to the coil so as to receive and rectify an electrical voltage induced in the coil;
a switching capacitor electrically coupled to the tank capacitor; and
a microcontroller electrically coupled to the switching capacitor so as to tune or detune the resonant frequency established by the coil, the tank capacitor, and the switching capacitor.
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Abstract
Disclosed herein are embodiments of novel WPT systems, devices, and methods of using the same. Also disclosed herein are methods for controlling the power delivered from a stationary source (e.g., a primary coil) to a moving telemetric device (e.g., a secondary coil) via magnetic resonance coupling. The systems, device, and methods described herein can be used to tune and/or detune resonant frequency between a primary coil and a telemetric device so as to prevent device malfunction and/or tissue damage for the small animals associated with the telemetric device.
23 Citations
23 Claims
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1. A device, comprising:
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a coil defining a coil axis; a tank capacitor electrically coupled to the coil and wherein the coil and the tank capacitor define a resonant frequency; a rectifier coupled to the coil so as to receive and rectify an electrical voltage induced in the coil; a switching capacitor electrically coupled to the tank capacitor; and a microcontroller electrically coupled to the switching capacitor so as to tune or detune the resonant frequency established by the coil, the tank capacitor, and the switching capacitor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system, comprising:
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a primary circuit comprising (i) a primary coil defining a primary coil axis; and
(ii) a primary tank capacitor coupled to the primary coil; anda secondary circuit comprising (i) a secondary coil defining a secondary coil axis;
(ii) a secondary tank capacitor;
wherein the secondary coil and the tank capacitor define a resonant frequency;
(iv) a rectifier coupled to the secondary coil so as to receive and rectify an electrical voltage induced in the secondary coil by the primary coil;
(v) a switching capacitor electrically coupled to the tank capacitor; and
(vi) a microcontroller electrically coupled to the switching capacitor so as to tune or detune a secondary resonant frequency of the secondary circuit with respect to a primary resonant frequency associated with the primary coil and the primary tank capacitor. - View Dependent Claims (14)
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15. A method, comprising:
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inducing an oscillating voltage in a secondary circuit with an oscillating electromagnetic field in a primary circuit, wherein the secondary circuit is part of a telemetric device associated with an animal and the primary circuit is part of a cage in which the animal is physically confined; measuring a voltage associated with the oscillating voltage in the secondary circuit with a microcontroller using an analog input; and adjusting a resonant frequency difference between the secondary circuit and the primary circuit based on the measured voltage. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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Specification