An adaptive inductive ballast is provided with the capability to communicate with a remote device powered by the ballast. To improve the operation of the ballast, the ballast changes its operating characteristics based upon information received from the remote device. Further, the ballast may provide a path for the remote device to communicate with device other than the adaptive inductive ballast.

Adaptive inductive power supply with communication

A power supply system capable of supplying power from a power transmitter to a power receiver in an electrically non-contact manner, in which a power transmission module is attached to the power transmitter and a power reception module is attached to the power receiver. The power transmission module has a plurality of transmission-side coils for transmitting power and a plurality of transmission-side switches for turning on/off operation of the transmission-side coils. The power reception module has a plurality of reception-side coils for receiving power, a plurality of reception-side switches for turning on/off operation of the reception-side coils and, further, has a determination circuit for performing control so as to operate any of the transmission-side coils and any of the reception-side coils in a combination realizing highest power transmission efficiency.

Non-contact power supply system

A method and apparatus for providing power to e.g., a chargeable device via a radio frequency link. In one aspect, a method of providing power to a chargeable device via radio frequency link comprises generating a substantially un-modulated signal. The method further comprises radiating a substantially un-modulated radio frequency (RF) signal to the chargeable device via a transmit antenna based on the substantially un-modulated signal. The method further comprises powering or charging the chargeable device with power delivered by the substantially un-modulated RF signal.

Method and apparatus for delivering energy to an electrical or electronic device via a wireless link

A method and system for providing power to a chargeable device via radio frequency link are provided. In one aspect, a method of providing power to a chargeable device via radio frequency link comprises generating a substantially unmodulated signal. The method further comprises radiating a substantially unmodulated radio frequency (RP) signal to the chargeable device via a transmit antenna based on the substantially unmodulated signal. The method further comprises powering or charging the chargeable device with power delivered by the substantially unmodulated RF signal.

Method and system for powering an electronic device via a wireless link

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.

Adaptive inductive power supply

The terminal includes a coil co-operating with a data transmitter/receiver. The portable object includes a remotely powered electric circuit including: a coil for picking up the modulated magnetic field from the terminal or for responding by producing modulated disturbance of the magnetic field; a converter including a rectifier stage and a filter stage transforming the magnetic field picked up by the coil into a DC power supply voltage; and a data transmitter/receiver, the receiver including a demodulator for demodulating the amplitude of the signal picked up by the coil, the amplitude demodulator operating on the signal output by the rectifier and filter stages. Each of the coils forms a portion of a tuned resonant circuit radiating the field in free space. The amplitude modulation is a low depth modulation, with a modulation ratio that is typically less than or equal to 50%.

Contactless communication system for exchanging data

Objet portatif telealimente pour la communication sans contact avec une borne

The terminal (100) comprises a coil (102) co-operating with data transmitting/receiving means (108-118). The portable object (200) comprises a remote powered electric circuit including: a coil (202), for picking up the modulated magnetic field derived from the terminal or for generating in response a modulated pick-up in this magnetic field; converting means, comprising a rectifying stage (210) and a filtering stage (212), transforming the magnetic field picked up by the coil and a direct voltage supply (d); and data transmitting/receiving means, the receiving means comprising means (218) for demodulating the amplitude of the signal picked up by the coil, these amplitude demodulating means operating on the signal (b) delivered in output of the rectifying and filtering stages. The coils (102, 202) each form part of a tuned resonant circuit (106, 208) radiating the field in free space. The amplitude modulation is a slight depth modulation, with a modulation rate typically not more than 50 %.

Data exchange system by contactless communication between a terminal and remote powered portable objects

Data exchange system by contactless communication between terminal and remote powered portable objects

The terminal (100) includes a coil (102) cooperating with data transmitter/receiver means (108-118). The portable object (200) includes a remotely powered electric circuit comprising: a coil (202) for picking up the modulated magnetic field from the terminal or for responding by producing modulated disturbance of said magnetic field; converter means comprising a rectifier stage (210) and a filter stage (212) transforming the magnetic field picked up by the coil into a DC power supply voltage (d); and data transmitter/receiver means, the receiver means including means (218) for demodulating the amplitude of the signal picked up by the coil, said amplitude demodulator means operating on the signal (b) output by the rectifier and filter stages. Each of the coils (102, 202) forms a portion of a tuned resonant circuit (106,208) radiating the field in free space. The amplitude modulation is low depth modulation, with a modulation ratio that is typically less than or equal to 50%.

Wehoski Frederic

Papers

Contactless communication system for exchanging data

Objet portatif telealimente pour la communication sans contact avec une borne

Data exchange system by contactless communication between a terminal and remote powered portable objects

Data exchange system by contactless communication between terminal and remote powered portable objects

A device for exchanging data gy contactless communication between a terminal and remotely powered portable objects