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)
09/1991
09/18/1991EP0447389A2 Transformer
09/18/1991CN2085090U Compound autotransformer-type voltage regulator
09/18/1991CN2085089U Six-column core of conjugate type rectifying transformer
09/18/1991CN2085088U Circulating-vector electric field generator
09/17/1991US5048598 Reservior tank for a liquid cooling system
09/16/1991CA2012333A1 Non-inductive winding for coils in alternating current circuits
09/10/1991US5047745 Laminations
09/10/1991US5047744 High voltage fluid filled transformer
09/10/1991CA1288792C Gasket mounting arrangement
09/05/1991WO1991013450A1 Modified i-plate core structures and methods of yoking amorphous metal stacked core transformers
09/04/1991EP0444522A1 Coil device
09/04/1991EP0444521A1 Coil device
09/04/1991CN2084229U Y type three-phase tramformer with laminated full inclined joint
09/04/1991CN2084228U Air cooling device for forcing oil circulating
09/03/1991US5046153 Coil terminal connection
09/03/1991CA1288534C Inductance multiplier circuit
08/1991
08/29/1991DE4104718A1 Wound filter with interconnected electromagnetic coils - has rotary mounted coil former(s), with exception of input and output coil formers
08/28/1991WO1991012960A1 Laminated strips of amorphous metal
08/28/1991EP0443512A1 Composite electric part of stacked multi-layer structure
08/28/1991EP0443173A1 Wideband tunable monolithic inductor
08/28/1991CN1054144A Method for reforming high loss distribution transformer
08/28/1991CA2053300A1 Laminated strips of amorphous metal
08/22/1991WO1991012619A1 Magnetic coil composed of stacked metal sheets, electrical machine with magnetic coils composed of stacked metal sheets, and process for manufacturing magnetic coils
08/21/1991CN2083327U Removable cushion dashpot for transformer
08/21/1991CN2083326U Low-vacuum oil filter
08/14/1991EP0441140A1 Insulant for oil-filled electrical device
08/14/1991EP0440865A1 Electrical insulation
08/14/1991DE4004019A1 Magnetspule aus gestapelten blechen, elektrische maschine mit magnetspulen aus gestapelten blechen, verfahren zur herstellung von magnetspulen Magnetic coil of stacked metal sheets, electrical machine with solenoid stacked metal sheets, process to manufacture of solenoid
08/14/1991CN2082892U Rainproof casing of 35 kv outdoor current transformer
08/07/1991WO1991012107A1 Welding apparatus and transformer therefor
08/07/1991CN2082452U Lighting-protective transformer of power source shield
08/07/1991CN2082451U Radiating pipe arrangement structure of oil tank
08/07/1991CN2082450U Output protective hood of power transformer
08/07/1991CA2050581A1 Welding apparatus and transformer therefor
08/06/1991US5037706 Laminated strips of amorphous metal
07/1991
07/31/1991EP0439410A2 Laminate for magnetic core
07/31/1991EP0438636A2 Double insulated transformer of the coaxial type and method of assembling the same
07/31/1991CN2082012U Box-type voltage-release metal expander
07/30/1991CA1286930C Magnet wire and method of using the same
07/24/1991CN1013325B Liquid cooled transformer and apparatus for cooling the core
07/23/1991US5034854 Encased transformer
07/23/1991US5034717 Stationary electromagnetic induction unit
07/23/1991US5034716 Radial cooled autotransformer assembly
07/17/1991EP0436879A1 Circuit, respectively device, for supply of current or voltage to electronic equipment or the like
07/17/1991EP0436665A1 Variable speed, constant frequency generating system with input transformer
07/17/1991CN2081137U 脉冲变压器 Pulse transformer
07/17/1991CN2081136U Induction ballast iron core with new structure for fluorescent lamp
07/16/1991US5032816 Longitudinally contoured conductor for inductive electrical devices
07/16/1991US5032814 Mounting assembly for an ignition coil, in particular for an internal combustion engine of an automotive vehicle
07/16/1991US5032453 Insulating tape for making an impregnated insulating sleeve for electric conductors
07/16/1991CA1286366C Current measuring and magnetic core compensating apparatus and method
07/11/1991WO1991010245A1 Transformer with voltage balancing tertiary winding
07/11/1991WO1991010244A1 Toric-type transformer
07/10/1991EP0436434A1 Toroidal transformer
07/10/1991CN2080701U Sheet structure of transformer core
07/09/1991US5030933 Noise filter
07/09/1991US5030813 Welding apparatus and transformer therefor
07/03/1991EP0435461A2 Multiple turn low profile magnetic component using sheet windings
07/03/1991EP0435160A1 Inductor
07/03/1991CN2080215U Fluorescent lamp ballast with new structure
07/03/1991CN2080213U Box type metal releasing sheet expandor
07/02/1991US5028905 High voltage coil having split plastic tubes
07/02/1991US5028904 Inductance coil
06/1991
06/27/1991WO1991009441A1 Liquid crystal polymer for electric component insulation
06/27/1991WO1991009234A1 Construction of armature of electromagnetic brake
06/26/1991EP0434247A2 Shield for a magnet
06/26/1991CN2079757U Low-voltage power measuring box
06/25/1991US5027256 Component carrier with curved base
06/25/1991US5025949 Oil-filled transformer housing
06/22/1991WO1991010243A1 Coil assemblies
06/20/1991DE3941362A1 Treating transformer filled with insulating oil contg. PCB - by withdrawing contaminated oil, heating transformer and charging with uncontaminated oil
06/20/1991DE3937828C1 Ignition coil for IC engine - has two opposite-facing side walls of housing with orifices which serve as entrance for magnetic core
06/19/1991CN2079348U Box type metal expanding device
06/19/1991CA2021599A1 Shield for a magnet
06/18/1991US5025241 Transformer of ferrite closed magnetic circuit type
06/11/1991US5023585 Common-mode choking coil
06/11/1991US5023423 Transformer apparatus with rectifiers
06/06/1991DE4037407A1 Clip-on transformer giving improved measuring repeatability - uses self-aligning interlocking joints in toroidal core
06/06/1991DE3940025A1 Mains transformer with interwinding magnetic screen - uses isolating layer of ferrite or magnetic glass
06/05/1991EP0430802A1 Shielding device for a switching power supply transformer
06/05/1991EP0429843A1 Bushing for high direct voltages
06/05/1991EP0429447A1 Gasket assembly and electrical power transformer including the same
06/05/1991CN2078485U Transformer used "u" shape core structure
06/05/1991CN2078484U Voltage-stabilizing transformer
05/1991
05/30/1991WO1991007765A1 A planar transformer and a splitter/combiner using same
05/30/1991WO1991007764A1 Controlled drying-impregnation-polymerization processes
05/29/1991EP0429198A2 Bandgap reference voltage circuit
05/29/1991DE3939054A1 Strip winding for heavy-current power supply transformer - is terminated with sheet metal components shaped for surface mounting or connection to pins on former
05/29/1991DE3938718A1 Miniature chip inductor for SMD circuitry - has basic body with lower and top parts, with lower part contacting faces for circuit board
05/22/1991EP0427719A1 Inductive coil structure
05/22/1991CN2077581U Current transformer of small ratio of transformation without turns going through core
05/22/1991CN2077580U Structure of regulatable supervoltage transformer with three windings
05/22/1991CN2077579U Elastic expander for current transformer
05/22/1991CN2077578U Bus fixed current transformer
05/22/1991CN2077577U Rainproof casing for 35kv outdoor current transformer
05/21/1991US5017902 Conductive film magnetic components
05/16/1991DE4035163A1 Ignition coil for IC engine - has coils pre-mounted in housing with apertures in two sidewalls for insertion of magnetic core
05/15/1991EP0400112A4 High-voltage winding for core-form power transformers
05/14/1991US5015982 Ignition coil
05/14/1991US5015981 Electronic microminiature packaging and method
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