System and method for powering a load
First Claim
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1. A circuit for powering a remote device comprising:
- an inverter operating at the operating frequency;
a tank circuit;
an inductor for transferring power to the remote device;
a phase comparator for comparing the phase of the voltage supplied to the tank circuit with the phase of the voltage supplied to the inductor; and
a disabling means for disabling the inverter if the phase of the voltage supplied to the inductor and the phase of the voltage supplied to the tank circuit are out of phase by a predetermined amount.
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Abstract
A power supply for inductively powering a remote device has an inverter operating at an operating frequency and a primary coil. A phase comparator compares the phase of the voltage or current delivered by the power supply. If the phase relationship detected by the comparator is unacceptable, the inverter is disabled. After a period of time, the inverter is re-enabled, and the phase relationship is again determined.
19 Citations
17 Claims
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1. A circuit for powering a remote device comprising:
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an inverter operating at the operating frequency;
a tank circuit;
an inductor for transferring power to the remote device;
a phase comparator for comparing the phase of the voltage supplied to the tank circuit with the phase of the voltage supplied to the inductor; and
a disabling means for disabling the inverter if the phase of the voltage supplied to the inductor and the phase of the voltage supplied to the tank circuit are out of phase by a predetermined amount. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of operating a circuit comprising:
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operating an inverter at a first frequency;
determining a first operating phase of the inverter; and
if the first operating phase is unacceptable, then disabling the inverter. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification