Abstract: The invention comprises a high frequency inductor filter apparatus coupled with an inverter yielding high frequency harmonics and/or non-sixty Hertz output. For example, an inductor/converter apparatus is provided using a silicon carbide transistor that outputs power having a carrier frequency, modulated by a fundamental frequency, and a set of harmonic frequencies. A filter, comprising an inductor having a distributed gap core material and optional magnet wires, receives power output from the inverter/converter and processes the power by passing the fundamental frequency while reducing amplitude of the harmonic frequencies.

Abstract: Driver for an acoustic transducer having a moving coil of substantially equal length to the air gap. The air gap may itself be extended in length using an upper or lower lip, or both. A stationary coil is also provided. The moving and stationary coils can be controlled by suitable control blocks to form an electromagnet-based transducer with reduced distortion. The acoustic transducer may be a hybrid acoustic transducer.

Abstract: Driver for an acoustic transducer having a moving coil of substantially equal length to the air gap. The air gap may itself be extended in length using an upper or lower lip, or both. A stationary coil is also provided. The moving and stationary coils can be controlled by suitable control blocks to form an electromagnet-based transducer with reduced distortion.

Abstract: The invention is an incrementally actuated eddy current braking system. The system comprises first and second primary members, which further comprise arrays of permanent magnets arranged in alternating polarity. The respective magnets of the arrays face one another. A means for incremental displacement is drivingly connected to at least one of the primary members enabling the movement of said members relative to one another.

Abstract: The invention comprises an electrical apparatus and method of manufacture. The apparatus includes a substantially annular inductor comprising an inductor core composed of at least a distributed gap material. The distributed gap material includes particles of alternating layers of magnetic and non-magnetic materials separated by a gap material. The particles comprise an average layer thickness of less than about one hundred micrometers, where a majority of said layered particles comprise an average cross sectional size of less than about one millimeter. The inductor is cooled using at least one of: a thermally conductive potting material, a liquid coolant in direct contact with the inductor, a cooling line through the potting material or liquid coolant, and a chill coil in a container about the potting material and/or the liquid coolant.

Abstract: The invention is an incrementally actuated eddy current braking system. The system comprises first and second primary members, which further comprise arrays of permanent magnets arranged in alternating polarity. The respective magnets of the arrays face one another. A means for incremental displacement is drivingly connected to at least one of the primary members enabling the movement of said members relative to one another.

Abstract: Driver for an acoustic transducer having a moving coil of substantially equal length to the air gap. The air gap may itself be extended in length using an upper or lower lip, or both. A stationary coil is also provided. The moving and stationary coils can be controlled by suitable control blocks to form an electromagnet-based transducer with reduced distortion.

Abstract: The invention comprises a high frequency inductor filter apparatus coupled with an inverter yielding high frequency harmonics and/or non-sixty Hertz output. For example, an inductor/converter apparatus is provided that uses a silicon carbide transistor to output power having a carrier frequency, modulated by a fundamental frequency, and a set of harmonic frequencies. A filter, comprising an inductor having a distributed gap core material and optional magnet wires, receives power output from the inverter/converter and processes the power by passing the fundamental frequency while reducing amplitude of the harmonic frequencies.

Abstract: The invention is the novel use of Quantum Dots (QDs) for radiation dosimetry and includes novel dosimetry devices, systems and methods. The devices, systems and methods have use in a variety of dosimetry applications such as personal, environmental and research. The system for detecting doses of ionizing radiation comprises; a matrix comprising a photoluminescent semiconductor nanocrystals; an illumination interface for exposing the matrix to non-ionizing radiation; a response characterization interface for measuring photoluminescence, scatter or the optical density of the matrix and identifying differences in the photoluminescence, scatter or optical density caused by exposure to ionizing radiation; and a readout interface to quantify the photoluminescence or optical density differences as doses of radiation.

Abstract: A tramp metal separation device for removing contaminants from a stream of raw materials that is being conveyed by a pneumatic conveying line. The tramp metal separation device includes a first housing, a drawer, and at least one actuator. The first housing has an inlet and an outlet that are connectable to the pneumatic conveying line. The drawer is supported with respect to the first housing such that the drawer is moveable between an extended position, where a plurality of magnets are positioned within the first housing and a retracted position, where the magnets are positioned outside of the first housing. A wiper assembly removes contaminants from the magnets as the drawer moves from the extended position to the retracted position. The actuator moves the drawer between its extended position and its retracted position.

Abstract: Apparatus and methods are provided for generating hydrogen gas from water and, in particular, apparatus and methods for dissociating hydrogen and oxygen atoms from water molecules using a rotating magnetic field.

Abstract: A cellular communication tower is adapted to support a vertical axis wind turbine (VAWT) that includes a generator mechanism. The signal and power cable for the communication antennas run through the central axis or bore of the generator. The blades of the VAWT are disposed so as to avoid interferences with communication signals. The tower preferably deploys an open truss construction to avoid the impact of periodic pressure pulse as the turning blades shift out of alignment from shading the tower. Thus, with an open truss tower the turbine blades can be a larger size and still not cause such pressure pulses.

Abstract: This invention relates to acoustic drivers with stationary and moving coils. Time varying signals are applied to the moving and stationary coils to control the movement of a diaphragm, which produces audible sound. The time varying signals correspond to an input audio signal such that the sound corresponds to the input audio signal. Some of the described embodiments include multiple moving coils, multiple stationary coils or both. Some embodiments include feedback for adjusting one or more of the signals based on a characteristic of the acoustic driver. Various compensation and other features of the invention are also described in relation to various embodiments.

Abstract: An access control system includes a transmitter initiator that has a magnetic flux antenna constructed and arranged to direct magnetic energy in an angular direction, a plurality of RF tone detectors, a microcontroller, and a plurality of RF burst generators. The system includes at least one receiver responder that has a magnetic flux antenna, a plurality of RF tone detectors, a microcontroller, and a RF burst generator. The transmitter initiator's magnetic flux antenna and the receiver responder's magnetic flux antenna define an open-air gap therebetween. The transmitter initiator's magnetic flux antenna has a paramagnetic housing, electromagnetic windings within the paramagnetic housing, and at least one ferromagnetic element disposed within the open air gap. The paramagnetic housing and the ferromagnetic element are constructed and arranged to direct a magnetic field across the open air gap. The system is configured for wireless communication via near-field magnetic induction.

Abstract: The invention comprises a phase change inductor cooling system. The cooling system uses a non-conductive refrigerant in proximate and/or in direct contact with an inductor. Heat from the inductor changes the refrigerant from a liquid to a gas phase, which removes heat from the inductor. The gas phase refrigerant is subsequently removed from the inductor to remove heat from the environment about the inductor. The refrigerant is optionally recirculated using the steps of condensing and/or compressing the refrigerant prior to reintroduction into the environment proximate and/or in direct contact with the inductor.

Abstract: The invention comprises an inductor configured for filtering medium and/or high voltage power. The inductor includes an inductor core formed of a plurality of coated magnetic particles, each of a majority of the coated magnetic particles including: a magnetic particle core and a non-magnetic coating about a corresponding magnetic particle core. The inductor optionally includes: (1) a main inductor spacer separating a first turn of a winding from a terminal turn of the winding and (2) a segmenting spacer separating two consecutive turns of the winding about said core. The inductor is configured to convert power into an output current, such as power of at least one thousand five hundred volts with an input current of at least fifty amperes.

Abstract: Methods and apparatus for electromagnetic components comprise a core and a winding. The core and winding are configured to provide smaller and more effective electromagnetic components.

Abstract: The invention comprises an inductor mounting method and apparatus. An about annular inductor is mounted using a non-conducting mount element passing at least into a center opening of the inductor. Mounting hardware forces an edge surface of the mount into proximate contact with an edge of the inductor, where the mount and mounting hardware minimally contact the inductor. The mount optionally includes holes and/or grooves to further reduce mount/inductor contact, which aids liquid, convective, and/or radiative cooling of the inductor. The inductor is optionally composed of particles of magnetic material coated with carbon and embedded into an epoxy to yield a distributed gap material.

Abstract: This invention relates to acoustic drivers with stationary and moving coils. Time varying signals are applied to the moving and stationary coils to control the movement of a diaphragm, which produces audible sound. The time varying signals correspond to an input audio signal such that the sound corresponds to the input audio signal. Some of the described embodiments include multiple moving coils, multiple stationary coils or both. Some embodiments include feedback for adjusting one or more of the signals based on a characteristic of the acoustic driver. Various compensation and other features of the invention are also described in relation to various embodiments.