Patent
Wireless inductive power transfer
TLDR
In this paper, a wireless power transfer system includes a power receiver (105) and a power transmitter (101) generating a wireless inductive power transfer signal for powering the power receiver during a power transfer phase.Abstract:
A wireless power transfer system includes a power receiver (105) and a power transmitter (101) generating a wireless inductive power transfer signal for powering the power receiver (105) during a power transfer phase. An apparatus, often the power transmitter (101) comprises a first communication unit (305) communicating with a second communication unit of an entity using an electromagnetic communication signal. The entity may typically be the power receiver (105). The apparatus comprises a reference processor (307) for measuring and storing a reference value of a characteristic of the communication signal and a measurement unit (309) which repeatedly during the power transfer phase determines a measured value of the characteristic. A comparator (311) compares the measured values to the reference value and an initiator (313) triggers an entity detection process if the comparison indicates that a measured value and the reference value do not meet a similarity criterion. The entity detection process detect a presence of another entity.read more
Citations
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Patent
Foreign object detection in wireless energy transfer systems
TL;DR: In this article, the authors present apparatus, methods, and systems for wireless power transfer that include a power source featuring at least one resonator, a power receiver featuring one or more loops of conductive material and configured to generate an electrical signal based on a magnetic field between the power source and the power receiver, and control electronics coupled to the first and second detectors, where during operation, the control electronics are configured to measure the electrical signal of the first detector and compare the measured electrical signals to baseline electrical signals of the second detector to determine information about whether debris is positioned between the
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TL;DR: In this article, a system for inductive power transfer that selectively transmits power in a plurality of modes based on characteristics of a power receiver and determine which transmitter coils to drive based on received signal strength information is presented.
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TL;DR: In this paper, a wireless power transmitter according to an embodiment includes a coil and a capacitor which resonate with the wireless power receiver, and a core which connects the cell groups with each other.
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System, Apparatus And Method For Authenticating A Device Using A Wireless Charger
TL;DR: In this paper, a computing device includes a power receiving unit to receive energy wirelessly from a power transmitting unit via a receive coil; a load modulation logic to modulate a load coupled to the receive coil to cause a message to be transmitted to the power transmitting units via a first channel coupled to a receiving coil; and a wireless communication circuit to communicate with the power transmitter via a second channel.
References
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Patent
System and methods for inductive charging, and improvements and uses thereof
Afshin Partovi,Michael Sears +1 more
TL;DR: In this paper, various systems and methods for use with power supplies and other power sources and chargers and particularly those that use inductive charging are described, such as improved transfer of wireless power to mobile devices and batteries.
Patent
Controlling inductive power transfer systems
Michael Craig Stevens,Alexander Charles Knill,John Robert Dunton,Andrew Nicholas Dames,Kevin Alan Lamb +4 more
TL;DR: In this article, the authors propose an inductive power transfer system that detects if there is a substantial difference between a power drawn from the primary unit and a power required by the secondary device.
Patent
Adaptive inductive power supply with communication
TL;DR: In this article, an adaptive inductive ballast is provided with the capability to communicate with a remote device powered by the ballast, which can change its operating characteristics based upon information received from the remote device.
Patent
Systems and methods for providing positioning freedom, and support of different voltages, protocols, and power levels in a wireless power system
TL;DR: In this article, a wireless power charger system is described for use in charging or powering multiple devices with a wireless powered charger system, including mobile, electronic, electric, lighting or other devices, batteries, power tools, kitchen, military, industrial applications and/or vehicles.
Patent
Adaptive inductive power supply
TL;DR: In this paper, a contactless power supply has a dynamically configurable tank circuit powered by an inverter, which is inductively coupled to one or more loads and is capable of modifying the resonant frequency of the tank circuit, inverter frequency, the inverter duty cycle or the rail voltage of the DC power source.