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| Number | Title | Issue Date |
| 8120456 | Balancing circuit for a metal detector A balancing circuit for a metal detector. The metal detector includes an oscillating power source, a transmit coil connected to the oscillating power source, first and second receive coils inductively coupled to the transmit coil, a first amplitude balancing circuit... | 02/21/2012 |
| 7642888 | Electric reactor of controlled reactive power and method to adjust the reactive power An electric reactor of controlled reactive power is formed by a magnetic core, and at least one primary winding to which a main current is supplied to generate a main magnetic flow on the magnetic core. The reactor also includes at least a generator of the magnetic ... | 01/05/2010 |
| 7378828 | DC-DC converter having magnetic feedback A DC-DC converter suitable for multiple converter circuit topologies is disclosed. The DC-DC converter utilizes magnetic feedback of the output load current to provide broad inductance control of a magnetic element, while inhibiting saturation of the switched windin... | 05/27/2008 |
| 7342477 | Inductor An inductor comprising one or more windings disposed on opposed first and second surfaces of a flat-plate substrate. The windings are applied to the substrate by plating or photoresistive deposition techniques, with through-holes through the plate accommodating the ... | 03/11/2008 |
| 7268991 | Electrical circuit protection system A system to protect electrical circuits from rapid changes of voltage associated with a fault in an electrical load comprises an inductor placed in series between a drive circuit and load. The inductor is designed to be inefficient or lossy when the inductor core is... | 09/11/2007 |
| 7212078 | Method and assembly for providing impedance matching network and network assembly An impedance matching network and network assembly employ one or more variable inductive elements, wherein one or more of the variable inductive elements includes a high temperature ferrite core, a helical coil, and a means for physically translating the magnetic co... | 05/01/2007 |
| 7180206 | System for voltage stabilization of power supply lines The invention relates to a voltage stabilization system for power supply lines, comprising a variable inductance, an autotransformer and a system for controlling the variable inductance to automatically compensating for voltage variations of the power supply lines. ... | 02/20/2007 |
| 7180396 | Superconducting current limiting device with magnetic field assisted quenching The present invention relates to a superconducting current limiting device comprising a superconductor component (1) wherein each superconductor component (1) comprises a superconductor body (2) on which a coil (3) is wound the coil being... | 02/20/2007 |
| 7042311 | RF delivery configuration in a plasma processing system In one embodiment, a system for delivering radio frequency (RF) power to a plasma processing system includes an automatic impedance matching network configured to receive RF power from an RF generator, and a fixed impedance matching network coupled between the autom... | 05/09/2006 |
| 7030724 | Method and apparatus for coil-less magnetoelectric magnetic flux switching for permanent magnets Methods and apparatus that employ a coil-less magnetoelectric flux switch arrangement to repeatedly switch magnetic flux from at least one permanent magnet for the purposes of generating motive force and/or electrical energy. ... | 04/18/2006 |
| 7026905 | Magnetically controlled inductive device A controllable inductor, comprising first and second coaxial and concentric pipe elements, where said elements are connected to one another at both ends by means of magnetic end couplers, a first winding wound around both said elements, and a second winding wound ar... | 04/11/2006 |
| 7015785 | Inverter transformer and core structure thereof An inverter transformer and a core structure thereof are described. The core structure of the inverter transformer has a first core and a second core. The first core has a plurality of fork elements, a connection element, and a bottom element. The fork elements are ... | 03/21/2006 |
| 7002074 | Self-leaded surface mount component holder A self-leaded, surface mountable component package is provided for holding a wide variety of electrical components having widely variant conductor wire sizes in a manner achieving standardized conductor contact positioning. The general box-like configuration provide... | 02/21/2006 |
| 6980450 | High power density inverter and components thereof A compact high-power pure-sinewave inverter amenable to mass manufacturing techniques. Methods for increasing the power rating, power density and/or power conversion efficiency of a sinewave-modulated pulse-width-modulated (PWM) inverter having a either half-bridge ... | 12/27/2005 |
| 6956456 | Magnetron drive boosting transformer The present invention provides a boosting transformer for microwave oven, which is low in high-frequency loss, hardly saturated, small in size and easy to produce. The boosting transformer includes a rod-like ferrite core; and primary, secondary and heater windings ... | 10/18/2005 |
| 6946938 | Method and apparatus for coil-less magnetoelectric magnetic flux switching for permanent magnets Methods and apparatus that employ a coil-less magnetoelectric flux switch arrangement to repeatedly switch magnetic flux from at least one permanent magnet for the purposes of generating motive force and/or electrical energy. ... | 09/20/2005 |
| 6933822 | Magnetically influenced current or voltage regulator and a magnetically influenced converter A magnetically influenced current or voltage regulator includes a body of an anisotropic magnetisable material that provides a closed magnetic circuit. A first electrical conductor is wound around the body along at least a part of the close circuit for at least one ... | 08/23/2005 |
| 6919788 | Low profile high current multiple gap inductor assembly An inductor assembly includes a coil or coils of insulated conductor material defining an inside volume, an inner core of magnetic core material located within the inside volume, and an outer core of magnetic core material including structure overlying the coil and ... | 07/19/2005 |
| 6910260 | Integrated circuit inductors The invention relates to an inductor comprising a plurality of interconnected conductive segments interwoven with a substrate. The inductance of the inductor is increased through the use of coatings and films of ferromagnetic materials such as magnetic metals, alloy... | 06/28/2005 |
| 6674320 | System and method for orthogonal inductance variation A control system, method and apparatus is provided for an orthogonally variable inductor. A method and apparatus is also provided for voltage regulation. Regulation is provided without the use of Silicon devices, such as FET's, in the output current path.... | 01/06/2004 |
| 6211749 | Impedance matching device An impedance matching device provided between a high-frequency generator and a load device matches an impedance of the high-frequency generator with an impedance of the load device and includes at least a coupled circuit which comprises a core, and a main... | 04/03/2001 |
| 5994985 | Integrable high-Q tunable capacitor and method A high-performance integrable tunable inductor includes a "primary" coil and a "drive" coil placed in close proximity to each other and simultaneously driven with primary and drive currents, respectively. The drive current induces mutual components of ind... | 11/30/1999 |
| 5965989 | Transformer primary side lamp current sense circuit A circuit that senses a current signal in a secondary winding of a transformer by monitoring a current signal in a primary winding of the transformer. The monitored current signal contains an effective current component and a magnetization current compone... | 10/12/1999 |
| 5929737 | Controllable inductor A controllable inductor including at least one tubular core (10), a main winding (5) surrounding the core and a control winding (11) running substantially axially through said core and returning substantially axially outside thereof between said core and ... | 07/27/1999 |
| 5895979 | Power distribution network incorporating a voltage support transformer and process of use A power distribution network including a voltage support transformer is disclosed which uses the fault current from a line of the power distribution network in which a fault condition exists to support or stabilize the voltage across one or more other lin... | 04/20/1999 |
| 5789907 | Variable impedence transformer An enhanced variable impedance transformer is disclosed for controlling the power from an alternating input power source to a load in accordance with a direct current control signal. The variable impedance transformer comprises a first and a second annula... | 08/04/1998 |
| 5783984 | Method and means for combining a transformer and inductor on a single core structure In a prefer embodiment, an integrated transformer and inductor on a singe core structure to provide an impedance matching function and an inductor in series with the transformer's secondary which includes: a transformer core structure having a primary leg... | 07/21/1998 |
| 5770992 | Transformer with overshoot compensation coil A transformer that comprises a winding assembly, a first and a second output terminal and a first and a second conductive path. The winding assembly includes a first and a second winding assembly terminal, a winding coupled between the first and second wi... | 06/23/1998 |
| 5770982 | Self isolating high frequency saturable reactor The present invention discloses a saturable reactor and a method for decoupling the interwinding capacitance from the frequency limitations of the reactor so that the equivalent electrical circuit of the saturable reactor comprises a variable inductor. Th... | 06/23/1998 |
| 5737203 | Controlled-K resonating transformer An LC resonant circuit. The resonant circuit includes a resonant capacitor and a transformer. The transformer comprises a magnetic core having a primary winding, secondary winding and control winding wound on the core. The primary winding is loosely coupl... | 04/07/1998 |
| 5585766 | Electrically tuned matching networks using adjustable inductance elements A plasma processing system for use in fabricating electronic devices including an RF generator; a process chamber including an electrical load which produces a plasma within the chamber when powered by the RF generator; an electronically tunable matching ... | 12/17/1996 |
| 5576629 | Plasma monitoring and control method and system A plasma monitoring and control method and system monitor and control plasma in an electronic device fabrication reactor by sensing the voltage of the radio frequency power that is directed into the plasma producing gas at the input to the plasma producin... | 11/19/1996 |
| 5574418 | Three-phase autotransformer with a balancing function A three-phase autotransformer improving balance of three-phase voltages and currents. An iron core has three legs corresponding to the three phase. A common winding and/or a serial winding of each phase includes three coils. Two of the three coils are wou... | 11/12/1996 |
| 5534837 | Orthogonal-field electrically variable magnetic device An electro-magnetic device for use in applications requiring low-profile components. The device includes a magnetic substrate with a scheme of through-holes in association with a first and second winding, plated or wired, integral to the substrate and wou... | 07/09/1996 |
| 5450052 | Magnetically variable inductor for high power audio and radio frequency applications A magnetically variable inductor for high power, high frequency applications which includes a solenoid with a magnetic core therein, disposed coaxially around a conductor for carrying the high power, high frequency signal and a variable current source cou... | 09/12/1995 |
| 5426409 | Current controlled variable inductor A current controlled variable inductor comprises a magnetically saturable E" core having outer limbs each joined to a center limb by connecting limbs. A staggered series of flux bridges and air gaps are formed into alternating sides of the outer limbs. A ... | 06/20/1995 |
| 5392018 | Electronically tuned matching networks using adjustable inductance elements and resonant tank circuits The disclosure discusses impedance matching circuits based on parallel-resonant L-C tank circuits, and describes a low-loss design for an adjustable inductance element suitable for use in these parallel tank circuits. The application of an impedance match... | 02/21/1995 |
| 5163173 | Variable impedance transformer with equalizing winding An apparatus and method is disclosed for an improved variable impedance transformer for controlling the power from an alternating input power source to a load in accordance with a direct current control signal. The invention comprises a DC control winding... | 11/10/1992 |
| 4837497 | Variable transformer, reactor and method of their control A variable transformer, reactor having a core combining at least two complete core elements wiht a common yoke; primary winding divided into two independently fed sets of phase coils wound in opposite direction, arranged on symmetrical legs of core elemen... | 06/06/1989 |
| 4766365 | Self-regulated transformer-inductor with air gaps The transformer comprises a three-limbed magnetic core having two outer limbs each defining a central air gap. Two windings, an alternating current one and a direct current one, are wound around each outer limb. Primary and secondary windings are disposed... | 08/23/1988 |
