Patents
Sitemap › H01 - Basic electric elements › H01F - Magnets; Inductances; Transformers; Selection of materials for their magnetic properties › H01F 27 - Details of transformers or inductances, in general
Patents for H01F 27 - Details of transformers or inductances, in general (43,362)
08/1990
08/23/1990DE3904921A1 Laminated iron core, especially for transformers with mutually interleaved sheet-metal laminates
08/22/1990CN1044871A Transformers and cores for transformers
08/21/1990US4950837 Method for reclassifying PCB transformers
08/21/1990CA1273053A1 Voltage doubling coil for cd system producing pulsed plasma ignition
08/16/1990EP0382163A1 A reservoir tank for a liquid cooling system
08/15/1990CN1044731A Amorphous metal transformer core sandwich
08/15/1990CN1009231B Improved toroidal transformer and machines and methods for making same
08/14/1990US4949221 Encased electronic component
08/14/1990CA1272770A1 Surface-mounted electrical device
08/08/1990EP0381580A1 High-voltage power supply device for an X-ray tube
08/08/1990EP0380935A1 Method of making an amorphous metal transformer core sandwich
08/02/1990DE3902621A1 Method for producing a laminated core stack and voltage core, for inductive electricity meters, produced according to the method
08/02/1990DE3902219A1 Compartment coil former for the high-tension transformer of a television receiver
08/01/1990EP0379641A1 Ignition coil assembly for internal combustion engine
08/01/1990CA2007476A1 Amorphous metal transformer core sandwich
07/1990
07/31/1990US4945332 Noise suppression inductor
07/31/1990US4945322 Noise filter
07/31/1990US4944420 Oil-filled transformer housing
07/26/1990WO1990008390A1 Inductor transformer cooling apparatus
07/26/1990DE3901285A1 Transformer housing
07/24/1990US4943793 Dual-permeability core structure for use in high-frequency magnetic components
07/24/1990CA1271986A1 Ferromagnetic shield for magnetic resonance magnets
07/19/1990DE3900962A1 Secondary coil former with a high-voltage dome
07/18/1990EP0377691A1 Matrix transformer having high dielectric isolation
07/18/1990CN1044006A Improvements in laminations
07/12/1990WO1990007783A1 Coil with magnetic core made from grain-oriented iron sheets
07/12/1990WO1990007782A1 Packs of laminations and method and apparatus for forming them
07/12/1990DE3843807A1 Self-cooled high-voltage transformer
07/11/1990EP0376948A1 Wound capacitor device with controlled impedance.
07/11/1990CN1043820A Mutual-inductor with different mutual inductances
07/11/1990CN1043819A Enclosed dual-expansion mounth oil-water cooler
07/04/1990EP0375851A2 Encapsulated electrical or electronic device
07/04/1990CN1043584A Single phase output transformer with three phase input
07/03/1990US4939623 Modem with improved transformer assembly
07/03/1990US4939494 Surface-mounted-type inductance element
07/03/1990CA2005429A1 Transformers and cores for transformers
06/1990
06/27/1990EP0375502A1 Ignition coil with a divided high-voltage winding, particularly for an internal-combustion engine
06/27/1990EP0374524A1 Pair of core laminates and core sheet parcel for shell form-type transformers
06/27/1990CN1008569B Invariable inductance and its manufacturing process
06/26/1990US4937729 Chopper power supply including a printed circuit transformer
06/26/1990US4937547 Shunt retaining clip in a ballast
06/26/1990US4937546 Ring-core transformer
06/21/1990DE3941323A1 Semiconductor logic circuit with FET(s) forming integral inductor - has three=dimensional structure with switched transistors, conductive tracks and connecting channels arranged in different planes
06/20/1990EP0191806B1 Low profile magnetic structure in which one winding acts as support for second winding
06/20/1990CN1008491B Pressure releaser made of special-shaped glass
06/19/1990US4934048 Method of making surface mountable electronic device
06/14/1990WO1990006584A1 High-voltage winding for core-form power transformers
06/13/1990EP0372220A1 Transportable transformer station for overhead power transformers
06/13/1990EP0371980A1 Devices for bursting and decontamination, in particular of electric transformers and their oils
06/13/1990DE3841412A1 Transformer, especially power transformer
06/13/1990CN1043036A 电感器组件 Inductor assembly
06/13/1990CN1008412B Coil assembly and support system for transformer, transformer empliying same and method for manufacture thereof
06/12/1990CA2000560A1 Transformer with folded amorphous metal core
06/06/1990EP0371239A1 Process and devices for removing a liquid containing chlorinated organic compound from fluid-soaked components of an apparatus
06/06/1990EP0371157A1 Network transformer
06/05/1990US4931761 Compact transformer
06/05/1990US4931679 Printed circuit board components with alternate mounting modes
05/1990
05/31/1990DE3839771A1 Switching-network transformer having only one core
05/30/1990EP0370681A2 Inductor assembly
05/30/1990EP0370574A1 Transformer winding in the form of a disc winding provided with axial channels
05/23/1990CN2057530U Isolation transformer
05/22/1990US4928138 Power supply with integral filter and cooling device
05/22/1990US4928020 Saturable inductor and transformer structures for magnetic pulse compression
05/22/1990US4927804 Thin-film transformer and magnetic head provided with such a transformer
05/21/1990CA2001773A1 Inductor assembly
05/17/1990WO1990005406A1 Variable speed, constant frequency generating system with input transformer
05/17/1990DE3938177A1 Stossstrom-unterdrueckungsschaltung und magnetische einrichtung darin Surge current-unterdrueckungsschaltung and magnetic device is
05/15/1990US4926152 Ignition coil assembly for internal combustion engine
05/15/1990US4926151 Chip-type coil element
05/09/1990EP0367602A1 Improvements in magnetic cores
05/09/1990CN1007943B Inductance element and method of mfg. the same
05/08/1990US4924200 Split bobbin and coil device
05/02/1990CN1041846A Transformer with three-phase input and single-phase output
05/02/1990CN1041845A Anti-thunderstruck device for distribution transformer
05/02/1990CN1041709A Process for preparation of aluminium-oxide oil purifier
05/01/1990US4922405 High voltage transformer
05/01/1990US4922156 Integrated power capacitor and inductors/transformers utilizing insulated amorphous metal ribbon
04/1990
04/30/1990CA2001880A1 Process for removing liquid containing chlorinated organic compounds from liquide-impregnated components of appliance and apparatus for carrying out said process
04/25/1990EP0365407A1 Power transformer with reduced heat generation
04/25/1990EP0365065A1 Magnetic field screens
04/24/1990CA1268219A1 Ac power supply with improved cooling means
04/18/1990EP0364171A2 Highfrequency heating apparatus using frequency-converter-type power supply
04/17/1990US4918418 Inductive coil structure with electrical return path
04/17/1990US4916806 Method and device for mounting electric components on a circuit board
04/12/1990DE3834590A1 Holder for fastening an annular core
04/11/1990EP0362353A1 Immersion-type electrical apparatus with increased fire protection
04/10/1990US4916424 Electric part in the form of windings
04/10/1990US4914804 Method of making a surface mountable electronic device
04/04/1990CN2055636U Superlight test transformer
04/04/1990CN2055634U Roll type circular cross section iron core and curve cutting device
04/03/1990US4914561 Dual transformer device for power converters
04/03/1990US4914413 Transformer with layer-wound and random wound windings
04/03/1990US4913178 Process and apparatus for removing PCB's from electrical apparatus
04/03/1990CA2000087A1 Article of manufacture
03/1990
03/28/1990CN1007393B Liquid cooled static excitation system for dynamoelectric machine
03/27/1990US4912618 Variable speed, constant frequency generating system with input transformer
03/27/1990US4912447 Transformer with channels in bobbin
03/27/1990US4912446 High energy density hyperconducting inductor
03/27/1990US4910863 Method of making an amorphous metal transformer
03/22/1990DE3830740A1 High-power coil
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