Abstract: A radome is provided. The radome comprises a heating element positioned on a surface of the radome, the heating element consisting of a receiver coil of a receiver of a wireless power transfer system, the receiver coil formed of a resistive foil material; and a transmitter coil of a transmitter of a wireless power transfer system, the transmitter coil for generating a magnetic field for transferring power to the receiver coil via magnetic field coupling.

Abstract: The system includes a power stage for inverting an inputted power signal and for rectifying a received power signal. The system includes a trigger circuit for synchronizing wireless power transfer; a clock generator for generating a clock signal; a switching element electrically connected to the power stage, and selectively electrically connected to the trigger circuit and the clock generator, such that when the switching element electrically connects the clock generator to the power stage, a transceiver element is configured to transfer power by generating an electric field and/or a magnetic field, and when the switching element electrically connects the trigger circuit to the power stage, the transceiver element is configured to extract power from a generated electric field and/or a generated magnetic field.

Abstract: There is provided a coil for wireless power transfer. The coil comprises a continuous wire strand forming multiple windings in a plane of a printed circuit board (PCB). The multiple windings comprise an innermost winding and an outermost winding enclosing the innermost winding. The coil further comprises at least one electrical connection to another continuous wire strand forming multiple windings in another plane of the PCB. The electrical connection is located intermediate the innermost winding and the outermost winding.

Abstract: System and method for wireless power transfer. The system comprises a plurality of wireless transmitters, connectable to a power source; a plurality of wireless receivers wherein each of the wireless receivers is configured to transiently receive power from at least one of the plurality of wireless transmitters when proximate thereto; and a plurality of voltage regulators, each voltage regulator electrically connected to at least one of the plurality of wireless receivers.

Abstract: A trigger circuit for use in a rectifier of a receiver of a wireless power transfer system is provided. The rectifier is for receiving wireless power transferred from a transmitter of the wireless power transfer system. The trigger circuit comprises a differential comparator for generating a trigger signal by comparing a positive input signal received at a receive element of the receiver to a negative input signal received at the receive element.

Abstract: There is provided a method of wireless power transfer through a medium. The method comprises controlling an input voltage of an inverter of a transmitter of a wireless power transfer system based on a detected parameter. The method further comprises generating, via the transmitter, a field for transferring power wirelessly through a medium to a receiver of the wireless power transfer system based on the input voltage. Other methods are also provided. There is also provided a controller, system, and transmitter for wirelessly transferring power through a medium.

Abstract: An alignment device comprises a coil configured to generate an induced voltage from a magnetic field, or an electrode configured to generate an induced voltage from an electric field. The alignment device further comprises a comparator configured to compare the induced voltage to a threshold voltage and activate an indicator based on the comparison.

Abstract: There is provided a bearing comprising an inner race, an outer race and one or more roller elements positioned radially between the inner and outer races. The bearing further comprises a wireless power transfer system affixed to or integrally formed with the at least one of the races.

Abstract: There is provided a method of wireless power transfer through a medium. The method comprises controlling an input voltage of an inverter of a transmitter of a wireless power transfer system based on a detected parameter. The method further comprises generating, via the transmitter, a field for transferring power wirelessly through a medium to a receiver of the wireless power transfer system based on the input voltage. Other methods are also provided. There is also provided a controller, system, and transmitter for wirelessly transferring power through a medium.

Abstract: An alignment device comprises a coil configured to generate an induced voltage from a magnetic field, or an electrode configured to generate an induced voltage from an electric field. The alignment device further comprises a comparator configured to compare the induced voltage to a threshold voltage and activate an indicator based on the comparison.

Abstract: An apparatus for use in a magnetic induction wireless power transfer system comprises at least one booster coil positioned adjacent an active coil of a magnetic induction wireless power transfer system and a capacitor electrically connected to the booster coil. A capacitance of the capacitor is selected such that a current in the booster coil is approximately equal to a current in the active coil during wireless power transfer. The apparatus may comprise at least one shielding coil positioned adjacent an active coil of a magnetic induction wireless power transfer system, a capacitor electrically connected to the shielding coil, and a conductor positioned adjacent the shielding coil opposite the active coil. The conductor encompasses the shielding coil.

Abstract: There is provided vehicle module adapted for underwater use comprising a housing enclosing a receiver of a wireless power transfer system. The receiver comprises a receiver coil positioned adjacent an inner surface of the housing and radially aligned with the housing. The receiver coil is for extracting power from a field generated by a transmitter coil of a transmitter of a wireless power transfer system when the transmitter coil at least partially surrounds the housing and is radially aligned with the receiver coil.

Abstract: An apparatus for use in a magnetic induction wireless power transfer system comprises at least one booster coil positioned adjacent an active coil of a magnetic induction wireless power transfer system and a capacitor electrically connected to the booster coil. A capacitance of the capacitor is selected such that a current in the booster coil is approximately equal to a current in the active coil during wireless power transfer. The apparatus may comprise at least one shielding coil positioned adjacent an active coil of a magnetic induction wireless power transfer system, a capacitor electrically connected to the shielding coil, and a conductor positioned adjacent the shielding coil opposite the active coil. The conductor encompasses the shielding coil.

Abstract: A radome is provided. The radome comprises a heating element positioned on a surface of the radome, the heating element consisting of a receiver coil of a receiver of a wireless power transfer system; and a transmitter coil of a transmitter of a wireless power transfer system, the transmitter coil for generating a magnetic field for transferring power to the receiver coil via magnetic field coupling.

Abstract: A transmitter for transferring power to a receiver of a wireless power transfer system is provided. The transmitter comprises a transmitter element and an inverter comprising a switched mode zero-voltage switching (ZVS) amplifier. The amplifier comprises a pair of circuits. The circuits comprise at least a transistor and at least a capacitor arranged in parallel. The circuits further comprise at least an inductor arranged in series with the transistor and capacitor. The amplifier further comprises a ZVS inductor electrically connected to the pair of circuits. The ZVS inductor operates as the transmitter element of the transmitter to transfer power to a receiver of a wireless power transfer system via magnetic field coupling. The transmitter may alternatively comprise a transmitter element, and an combined direct current/direct current (DC/DC) converter and inverter. The combined DC/DC converter and inverter comprises an amplifier comprising: a pair of circuits.

Abstract: A wireless power transfer system is provided. The wireless power transfer system comprises a resonator comprising a capacitor. The capacitor comprises at least two active electrodes; and a passive electrode adjacent the active electrodes and configured to encompass the active electrodes to at least partially eliminate environmental influences affecting the active electrodes and to increase the overall capacitance of the system. The resonator further comprises at least one inductive coil electrically connected to the active electrodes, wherein the resonator is configured to extract power from a generated electric field via resonant electric field coupling.

Abstract: An overcurrent detection circuit for use in a transmitter of a wireless power transfer system is provided. The transmitter comprises a transmitter element for generating a field to transfer power to a receiver of a wireless power transfer system. The circuit is adapted to shut down a transmitter of a wireless power transfer system in response to a detected short circuit event. An overvoltage protection circuit for use in a receiver of a wireless power transfer system is also provided. The receiver comprises a receiver element for extracting power from a field generated by a transmitter of a wireless power transfer system, and a switching element electrically connected to the receiver element. The overvoltage protection circuit is adapted to electrically ground the switching element based on an overvoltage event.

Abstract: A rectifier for use in a receiver of a wireless power transfer system for receiving wireless power transferred for a transmitter of the wireless power transfer system. The rectifier comprises a field effect transistor (FET) comprising: a source terminal electrically connected to ground; a drain terminal electrically connected to a receive element of the receiver. The receive element is for extracting power from the transmitter of the wireless power transfer system. The FET further comprises a gate terminal electrically connected to the receive element. The gate terminal is driven by a gate signal in phase with an input signal received at the receive element.

Abstract: An auxiliary inverter for use with a main inverter of a transmitter of a wireless power transfer system comprises: a coupling element; an output network electrically connected to the coupling element; and an adjustable power source electrically connected to the coupling element via the output network, an input voltage to the coupling element based on a detected signal. The coupling element is configured to induce a voltage in the main inverter of the transmitter of the wireless power transfer system to manage reflected impedance at the main inverter. The induced voltage is based on the input voltage to the coupling element.

Abstract: There is provided a method of operating at least one transmitter module of a wireless power transfer system. Each transmitter module comprises a plurality of transmitter elements arranged in a plurality of offset layers with one transmitter element per layer. The method comprises detecting a receiver at at least one transmitter element of the transmitter module. The method further comprises, in response to the detecting, generating a power signal to transfer power from a first transmitter element of the transmitter module to the detected receiver. The method further comprises causing a second transmitter element of the transmitter module to remain inactive during the transferring. Controller and further methods are also provided.