Patents for H01F 21 - Variable inductances or transformers of the signal type (1,432)
03/2009
03/26/2009WO2008087207A3 Anisotropic magnetic elements for spintronic devices
03/26/2009US20090079269 Power transmission control device, power transmitting device, power receiving device, non-contact power transmission system, electronic instrument, secondary coil position detection method, and primary coil positioning method
03/25/2009EP2038902A1 Programmable inductor
03/18/2009CN101388551A Electricity quality intelligent monitoring and resonating device
03/05/2009WO2009029484A1 Mass magnifier using magnetic fields and mu-metal to provide an energy storage flywheel for use in conventional, microtechnology, and nanotechnology engines
03/05/2009WO2009028269A1 Element assembly, and its manufacturing method
03/04/2009CN101377970A Interactive screw type inductive element
03/03/2009US7498922 Self-damped inductor
02/2009
02/25/2009CN100464420C Variable inductor for integrated circuit and printed circuit board
02/12/2009US20090040683 Electrical devices having adjustable capacitance
02/11/2009EP1327252A4 Linear inductive fluid level sensor
01/2009
01/28/2009CN101354951A Magnetic path parallel connection leakage self-shielding type controllable inductor
01/22/2009WO2008145478A3 Tunable inductive component and use of the component
01/21/2009EP2016598A2 Electricity generating apparatus utilizing a single magnetic flux path
01/14/2009EP1554590B1 Device for a coil assembly as magnetic field sensor for position determination
01/14/2009CN201181625Y Iron core reactor with adjustable reactance rate
01/14/2009CN101345123A Inductor-adjustable apparatus
01/14/2009CN101345122A Direct current flux control type adjustable reactor
01/08/2009US20090009274 Short-circuit indicator for electrical lines for power distribution
01/06/2009US7474188 40° phase-shifting autotransformer
12/2008
12/31/2008CN100447915C Micro-electromechanical inductive switch
12/25/2008US20080315982 Coupled-inductor core for unbalanced phase currents
12/17/2008CN101325115A Inductive element
12/11/2008US20080303505 Self Tuning High Voltage Power Supply
12/04/2008DE102007024908A1 Abstimmbares induktives Bauelement und Verwendung des Bauelements A tunable inductor and use of the device
12/02/2008US7460001 Variable inductor for integrated circuit and printed circuit board
12/02/2008US7459904 Precision position sensor using a nonmagnetic coil form
11/2008
11/25/2008US7456716 Electrical devices having adjustable electrical characteristics
11/20/2008WO2008138623A1 Method for influencing the magnetic coupling between two bodies at a distance from each other and device for performing the method
11/20/2008US20080284550 Variable Inductor
11/20/2008CA2688134A1 Method for influencing the magnetic coupling between two bodies which are at a distance from one another, as well as an apparatus for carrying out the method
11/18/2008US7454299 Device and method for detecting an end of a movement of a valve piston in a valve
11/13/2008DE10331866B4 Einrichtung zur Steuerung einer Spulenanordnung mit elektrisch variierbarer Induktivität, sowie Schaltnetzteil Means for controlling a coil arrangement with electrically diversifiable inductance and switching power supply
11/06/2008WO2008133972A1 Adjustable mid air gap magnetic latching solenoid
11/06/2008WO2008103524A3 Linear variable differential transformer with complimentary step-winding secondary coils
11/04/2008US7447492 On chip transformer isolator
10/2008
10/29/2008CN101295575A Great current bearable and continuously adjustable microinductor unit
10/15/2008EP1844499B1 Use of superconductor components in thin layers as variable inductance and devices including said components and corresponding control method
10/15/2008CN201134323Y Electromagnetic induction controlled direct driving reciprocating type high efficient transducer
10/01/2008CN101277084A Method and apparatus for flexibly starting high voltage motor
09/2008
09/25/2008WO2008094919A3 Shielded power coupling device
09/16/2008US7425884 Electrical device and method of producing the same
09/16/2008US7425883 Magnetic element for multi-phase and method of manufacturing the same
09/04/2008US20080211478 Frequency Controller Resonant Converter
09/03/2008CN101256879A Electric impedance variable reactor
08/2008
08/27/2008CN101253586A Inductor device for multiband radio frequency operation
08/07/2008CA2676004A1 Shielded power coupling device
07/2008
07/31/2008US20080180194 Central frequency adjustment device and adjustable inductor layout
07/31/2008DE102008006140A1 Shielded power coupling device e.g. computed tomography scanner for medical applications, has shielding to inductive coupling efficiency increasing element when operated beyond predetermined power levels
07/24/2008WO2008087207A2 Anisotropic magnetic elements for spintronic devices
07/24/2008US20080176752 Laser trimming to tune the resonance frequency of a spiral resonator, the characteristics of a high temperature superconductor filter comprised of spiral resonators, or the resonance frequency of a planar coil
07/23/2008CN201091026Y Great current inductance structure improvement
07/23/2008CN101226815A Choke transformer without maintenance
07/22/2008US7401398 Method of manufacturing a magnetic element for multi-phase
07/16/2008CN100403462C Low-profile transformer and method of manufacturing the transformer
07/09/2008CN101217247A Electric machine (motor and generator) device
07/02/2008CN101212238A Signal distribution inductor
06/2008
06/25/2008CN201078795Y Assistant field excitation voltage-regulating transformer
06/18/2008CN201075327Y Movable core type electric welding machine regulating current device
06/18/2008CN201075326Y Movable core type electric welding machine regulating current device
06/12/2008US20080136572 Micro-electromechanical switched tunable inductor
06/12/2008US20080136569 Method and apparatus for coil-less magnetoelectric magnetic flux switching for permanent magnets
06/05/2008US20080129296 Radio-frequency coil arrangement
05/2008
05/28/2008CN101188159A Segment adjustable inductor
05/27/2008US7378828 DC-DC converter having magnetic feedback
05/22/2008US20080119363 Use of Superconductor Components in Thin Layers as Variable Inductance and Devices Including Said Components and Corresponding Control Method
05/21/2008CN201063943Y Dual-power automatic switchover type high-strength air discharge lamp (HID) ballast
05/13/2008US7372254 Linear force detecting element formed without ferromagnetic materials which produces a resolution in a range of microns or less
05/06/2008US7369010 Laser trimming to tune the resonance frequency of a spiral resonator, the characteristics of a high temperature superconductor filter comprised of spiral resonators, or the resonance of a planar coil
04/2008
04/17/2008WO2007121427A3 Electricity generating apparatus utilizing a single magnetic flux path
04/17/2008US20080088399 Series impedance matched inductive power pick up
04/17/2008DE102007032374A1 Filter mit einstellbarer Induktivität, Tapeverteilungssubstrat und Anzeigepanelaufbau Filter with adjustable inductance, tape distribution substrate and display panel set-up
04/17/2008DE102006048742A1 Vorrichtung an einem Streckwerk einer Spinnereimaschine, insbesondere Strecke, Karde, Kämmmaschine o. dgl., zur Belastung der Streckwerkswalzen, mit mindestens einem Druckmittelzylinder Device at a drafting a spinning machine, in particular draw frame, card, comber o. The like., To stress the drafting rollers, with at least one hydraulic cylinder
04/16/2008CN101161883A Apparatus on a drafting system of a spinning room machine, for weighting drafting system rollers
03/2008
03/27/2008US20080074227 Inductor topologies with substantial common-mode and differential-mode inductance
03/26/2008EP1902450A1 Inductor device for multiband radio frequency operation
03/20/2008WO2008031321A1 Inductive coupling coil and inductive coupling plasma apparatus thereof
03/20/2008WO2008031320A1 Inductive coupling coil and inductive coupling plasma apparatus thereof
03/20/2008US20080068119 Electric reactor of controlled reactive power and method to adjust the reactive power
03/20/2008US20080068118 Method for adjusting mutual inductance and a transformer that implements the same
03/19/2008EP1901317A1 Integrated magnetic device with piezoelectric control
03/13/2008WO2008014506A3 Dual inductor circuit for multi-band wireless communication device
03/13/2008US20080061916 Lateral Piezoelectric Driven Highly Tunable Micro-electromechanical System (MEMS) Inductor
03/12/2008CN201036114Y Arc welder capable of adjusting current
03/06/2008WO2008025759A1 Electrical component tuned by conductive layer deletion
03/06/2008WO2008008643A3 Inductive sensor
03/04/2008US7339453 Differential mode inductor with a center tap
03/04/2008US7339298 Compliant motor driven variable electrical device
02/2008
02/21/2008DE102006038154A1 Verfahren zur Impulsübertragung und Schaltungsanordnung zur Durchführung dieses Verfahrens A method of pulse transmission and circuit arrangement for carrying out this method
02/14/2008WO2007131796A3 Micromechanical actuators consisting of semiconductor compounds based on nitrides of main group iii elements
02/07/2008DE10117291B4 Variabler Induktor Variable inductor
01/2008
01/31/2008WO2008014506A2 Dual inductor circuit for multi-band wireless communication device
01/31/2008US20080024250 Coil block and electronic device using the same
01/31/2008US20080024146 Resistance compensation circuit and memory device and method thereof
01/29/2008US7323964 Non-contact power system with load and gap detection
01/24/2008US20080018424 Inductive sensor
01/24/2008US20080018390 Adjustable-inductance filter, tape distribution substrate comprising the filter, and display panel assembly comprising the tape distribution substrate
01/17/2008WO2008008643A2 Inductive sensor
01/17/2008WO2008007307A1 Programmable inductor
01/17/2008US20080012673 Variable-Diameter Electromagnetic Coil
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