Abstract: A wireless power transfer system includes a transmitter transducer, a signal generator and one or more power receivers. The signal generator may receive a first power signal from a power source and generate an alternating current transmission signal. The signal generator transmits the transmission signal to the transmitter transducer. The transmitter transducer may produce a magnetic field in a power transfer region during conduction of a transmission signal. The one or more power receivers may include a receiver transducer and a power processor. The receiver transducer may inductively receive a varying magnetic flux transmitted from the transmitter transducer when the receiver transducer is located in the power transfer region. The receiver transducer converts the received magnetic flux to a second power signal. The power processor converts the second power signal to a third power signal appropriate for a respective one or more loads.

Abstract: A wireless power transfer system includes a transmitter transducer, a signal generator and one or more power receivers. The signal generator may receive a first power signal from a power source and generate an alternating current transmission signal. The signal generator transmits the transmission signal to the transmitter transducer. The transmitter transducer may produce a magnetic field in a power transfer region during conduction of a transmission signal. The one or more power receivers may include a receiver transducer and a power processor. The receiver transducer may inductively receive a varying magnetic flux transmitted from the transmitter transducer when the receiver transducer is located in the power transfer region. The receiver transducer converts the received magnetic flux to a second power signal. The power processor converts the second power signal to a third power signal appropriate for a respective one or more loads.

Abstract: In some embodiments, a rotor assembly for an aerial vehicle includes a main body; and four or more rotors having blades mounted relative to the main body for rotation about respective axes configured to provide thrust predominantly in a common direction. Respective blade trajectories of rotors of at least one pair of adjacent rotors of the four or more rotors rotate in different planes. The blade trajectories of the at least one pair of adjacent rotors partially overlap when viewed along a line containing the common direction.

Abstract: A wireless near-field self-resonant impulse receiver includes a receiver body constructed to receive energy from a low-frequency external field by using an appropriately tuned, high frequency antenna that operates in an impulse mode under preselected self-resonant conditions.

Abstract: A wireless power transfer system may include a transmitter transducer assembly, a signal generator and one or more power receivers. The transmitter transducer assembly may include at least one transmitter transducer. The signal generator may be operationally configured to generate an alternating current transmission signal. The one or more power receivers may be electrically connected to one or more respective loads. Each of the one or more power receivers may include a receiver transducer assembly. The receiver transducer assembly may include at least one receiver transducer. Each receiver transducer of the at least one receiver transducer may receive a time varying electromagnetic flux of the electromagnetic field transmitted from the transmitter transducer assembly and produce a second power signal. The power processor may convert the second power signal to a third power signal appropriate for the respective one or more loads.

Abstract: A wireless power transfer system includes a transmitter transducer, a signal generator and one or more power receivers. The signal generator may receive a first power signal from a power source and generate an alternating current transmission signal. The signal generator transmits the transmission signal to the transmitter transducer. The transmitter transducer may produce a magnetic field in a power transfer region during conduction of a transmission signal. The one or more power receivers may include a receiver transducer and a power processor. The receiver transducer may inductively receive a varying magnetic flux transmitted from the transmitter transducer when the receiver transducer is located in the power transfer region. The receiver transducer converts the received magnetic flux to a second power signal. The power processor converts the second power signal to a third power signal appropriate for a respective one or more loads.