Inductive power supply
AssigneePowermat Technologies Ltd.
InventorSami Anttila
Life of this patent
Estimating the term…
Abstract
A method for wirelessly powering a load over an inductive link, wherein the inductive link is between a primary side and a secondary side, including transmitting a first power from the primary side to the secondary side; receiving by the primary side a modulated data signal from the secondary side; demodulating the received data signal; determining, based on the demodulated data signal, whether to transmit power to the load; and transmitting, based on the determination, power to the load of the secondary side over the inductive link.
Claims18
A method for wirelessly powering, from a primary side, an apparatus in a secondary side over an inductive link between the primary side and the secondary side, comprising:
- performing, by the primary side, a first detection of the secondary side apparatus;
- performing, by the primary side, a second detection comprising a handshaking operation between the primary side and the secondary side;
- transmitting power, by the primary side, to the secondary side apparatus;
- receiving, by the primary side, a modulated data signal from the secondary side;
- demodulating, by the primary side, the modulated data signal;
- and
- receiving, by the primary side from the secondary side, a command to perform any action selected from the group consisting of increasing power level, decreasing power level, stopping powering, and continuing powering.
A method for wirelessly powering, from a primary side, an apparatus in a secondary side over an inductive link between the primary side and the secondary side, comprising:
- triggering, by said secondary side, a first detection of the secondary side apparatus in a primary side apparatus;
- responding, by said secondary side, to a handshaking operation from the primary side;
- receiving, by said secondary side, over the inductive link in the secondary side from the primary side a carrier signal containing power;
- measuring, by said secondary side, a current through a load of the apparatus or a voltage over the load of the apparatus, said current or voltage being stimulated by said received power;
- and
- switching, by said secondary side, a modulating resistor at least partly in response to said current measurement or said voltage measurement,
- such that a modulated carrier signal is receivable by the primary side, over said inductive link, the modulated carrier signal providing ongoing information pertaining to output power at the secondary side.
A primary side device for wirelessly powering an apparatus in a secondary side over an inductive link between the primary side and the secondary side, wherein the device comprises:
- a detection system for performing a first detection of the secondary side apparatus and a second detection for performing a handshaking operation;
- a signal receiver for receiving a modulated data signal from the secondary side apparatus;
- a demodulator for demodulating the modulated data signal;
- a controller for selecting, based on the demodulated data signal, any command from the group consisting of increase power level, decrease power level, stop powering, and continue powering;
- and
- a power stage for transmitting power over said inductive link to the secondary side apparatus.
A secondary side device for wirelessly receiving power from a primary side over an inductive link between the primary side and the secondary side device, wherein the device comprises:
- a signal receiver for triggering a handshaking operation between the primary side and the secondary side;
- a power receiver for receiving over the inductive link in the secondary side from the primary side a carrier signal containing power;
- a rectifier for rectifying the received power to a secondary side apparatus;
- a modulating resistor for modulating an amplitude of the received carrier signal;
- a modulator switch for switching the modulating resistor at least partly in response to said current measurement or said voltage measurement;
- and
- a secondary side microcontroller operable to measure output current through a load of the secondary side apparatus or a voltage over the load of the secondary side apparatus and further operation to control said modulator switch thereby generating a modulated carrier signal receivable by the primary side over the inductive link, the modulated carrier signal providing ongoing information pertaining to output power at the secondary side.
Dependencies are inferred from the claim text.