Adaptive inductive power supply
First Claim
Patent Images
1. A contactless power supply for supplying power wirelessly to an electrically powered remote device comprising:
- a tank circuit having a primary for transferring power to the electrically powered remote device by an inductive coupling, said electrically powered remote device having a secondary in electrical communication with a load;
drive circuitry configured to control application of power to said tank circuit, wherein operation of said drive circuitry varies based on a control signal applied to a control input of said drive circuitry; and
a control system coupled to said drive circuitry, said control system configured to control said control signal to direct operation of said drive circuitry, said control system configured to vary power by selectively changing a phase delay of said control signal provided to said drive circuitry.
1 Assignment
0 Petitions
Accused Products
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.
-
Citations
29 Claims
-
1. A contactless power supply for supplying power wirelessly to an electrically powered remote device comprising:
-
a tank circuit having a primary for transferring power to the electrically powered remote device by an inductive coupling, said electrically powered remote device having a secondary in electrical communication with a load; drive circuitry configured to control application of power to said tank circuit, wherein operation of said drive circuitry varies based on a control signal applied to a control input of said drive circuitry; and a control system coupled to said drive circuitry, said control system configured to control said control signal to direct operation of said drive circuitry, said control system configured to vary power by selectively changing a phase delay of said control signal provided to said drive circuitry. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A method of operating an inductive power supply to supply wireless power from a primary to an electrically powered remote device, the method including the steps of:
-
providing a control signal to switching circuitry of the inductive power supply to control application of power to the primary, wherein operation of the switching circuitry varies based on the control signal; establishing, based on application of power to the primary, an inductive coupling between the primary of the inductive power supply and a secondary of the electrically powered remote device, wherein the secondary of the electrically powered remote device is in electrical communication with a load; transferring power to the electrically powered remote device via the inductive coupling; varying power transferred to the electrically powered remote device via the inductive coupling; and selectively changing, in the inductive power supply, a phase delay of the control signal provided to the switching circuitry to vary power transferred wirelessly to the electrically powered remote device. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
-
-
22. An inductive power supply system comprising:
-
an inductive power supply including; a tank circuit having a primary configured to transfer power via an inductive coupling; drive circuitry configured to control application of power to said tank circuit, wherein operation of said drive circuitry varies based on a control signal applied to a control input of said drive circuitry; a control system coupled to said drive circuitry, said control system configured to control said control signal to direct operation of said drive circuitry and configured to vary power by selectively changing a phase delay of said control signal provided to said drive circuitry; an electrically powered remote device separable from said inductive power supply, said electrically powered 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 changing said phase delay of the control signal controls power wirelessly supplied to said receiver via said inductive coupling. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
-
Specification