Method and apparatus for controlling wireless induction power supply
First Claim
1. A method for controlling a wireless induction power supply, comprising:
- generating a plurality of switching signals for switching a transmitter winding and generating a power;
detecting a level of a transmitter signal from the transmitter winding while the switching signals are enabled and while the power is not delivered to a load for detecting a foreign object, the switching signals remain enabled if the level of the transmitter signal is higher than a threshold, the switching signals are disabled if the level of the transmitter signal is not higher than the threshold for a first time period, and the status of the load is detected as no-load and the switching signals are disabled if the level of the transmitter signal is higher than a high-threshold for a second time period, wherein the high-threshold is greater than the threshold; and
controlling a switch to deliver the power from a receiver winding to the load wherein the receiver winding is coupled to receive the power from the transmitter winding.
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Accused Products
Abstract
The present invention provides a method and an apparatus for controlling the wireless induction power supply. The apparatus comprises a transmitter control circuit and a receiver control circuit. The method comprises generating a plurality of switching signals for switching a transmitter winding and generating a power; detecting a level of a transmitter signal from the transmitter winding; and controlling a switch to deliver the power from a receiver winding to a load. The receiver winding is coupled to receive the power from the transmitter winding. The switching signals will be disabled if the level of the transmitter signal is not higher than a threshold over a first period or the level of the transmitter signal is higher than a high-threshold over a second period. Accordingly, the method and the apparatus according to the present invention have the foreign object detection (FOD) function for the safety.
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Citations
20 Claims
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1. A method for controlling a wireless induction power supply, comprising:
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generating a plurality of switching signals for switching a transmitter winding and generating a power; detecting a level of a transmitter signal from the transmitter winding while the switching signals are enabled and while the power is not delivered to a load for detecting a foreign object, the switching signals remain enabled if the level of the transmitter signal is higher than a threshold, the switching signals are disabled if the level of the transmitter signal is not higher than the threshold for a first time period, and the status of the load is detected as no-load and the switching signals are disabled if the level of the transmitter signal is higher than a high-threshold for a second time period, wherein the high-threshold is greater than the threshold; and controlling a switch to deliver the power from a receiver winding to the load wherein the receiver winding is coupled to receive the power from the transmitter winding. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for controlling a wireless induction power supply, comprising:
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generating a plurality of switching signals for switching a transmitter winding and generating a power; detecting a level of a transmitter signal from the transmitter winding while the switching signals remain enabled and while not delivering the power to a load for detecting a foreign object, wherein a status of the load is detected as no foreign object is detected and the switching signals continue to be enabled if the level of the transmitter signal is higher than a low-threshold, and the status of the load is detected as no-load and the switching signals are disabled if the level of the transmitter signal is higher than a high-threshold for a first time period; and controlling a switch to deliver the power from a receiver winding to the load wherein the receiver winding is coupled to receive the power from the transmitter winding. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. An apparatus for controlling a wireless induction power supply, comprising:
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a transmitter control circuit generating a plurality of switching signals for switching a transmitter winding and generating a power, and detecting a level of a transmitter signal from the transmitter winding while the switching signals remain enabled and while not delivering the power to a load for detecting a foreign object, wherein the foreign object is detected and the switching signals are disabled if the level of the transmitter signal is not higher than a threshold for a first time period, and the status of the load is detected as no-load and the switching signals are disabled if the level of the transmitter signal is higher than a high-threshold for a second time period; and a receiver control circuit controlling a switch to deliver the power from a receiver winding from to the load wherein the receiver winding is coupled to receive the power from the transmitter winding. - View Dependent Claims (20)
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Specification