ADAPTIVE INDUCTIVE POWER SUPPLY
First Claim
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1. A contactless power supply for supplying power wirelessly to a remote device comprising:
- a tank circuit having a primary for transferring power to the remote device by an inductive coupling;
drive circuitry configured to apply power to said tank circuit; and
a control system coupled to said drive circuitry, said control system configured to control operation of said drive circuitry, said control system configured to vary power by selectively inserting a phase delay.
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Abstract
A contactless power supply has a dynamically configurable tank circuit powered by an inverter. The contactless power supply is inductively coupled to one or more loads. The inverter is connected to a DC power source. When loads are added or removed from the system, the contactless power supply is capable of modifying the resonant frequency of the tank circuit, the inverter frequency, the inverter duty cycle or the rail voltage of the DC power source.
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Citations
29 Claims
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1. A contactless power supply for supplying power wirelessly to a remote device comprising:
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a tank circuit having a primary for transferring power to the remote device by an inductive coupling; drive circuitry configured to apply power to said tank circuit; and a control system coupled to said drive circuitry, said control system configured to control operation of said drive circuitry, said control system configured to vary power by selectively inserting a phase delay. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of operating an inductive power supply to supply wireless power to a remote device, the method including the steps of:
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establishing an inductive coupling between the inductive power supply and the remote device; transferring power to the remote device via the inductive coupling; varying power transferred to the remote device via the inductive coupling; and selectively inserting, in the inductive power supply, a phase delay to vary power transferred to the remote device. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. An inductive power supply system comprising:
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an inductive power supply including; a tank circuit having a primary configured to transfer power via an inductive coupling; drive circuitry configured to apply power to said tank circuit; a control system coupled to said drive circuitry, said control system configured to control operation of said drive circuitry and configured to vary power by selectively inserting a phase delay; a remote device separable from said inductive power supply, said remote device including; a receiver configured to receive power from said inductive power supply via said inductive coupling; a load operatively coupled to said receiver, wherein said receiver provides said power to said load; and wherein selectively inserting said phase delay controls power wirelessly supplied to said receiver via said inductive coupling. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
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Specification