Patents
Sitemap › H01 - Basic electric elements › H01F - Magnets; Inductances; Transformers; Selection of materials for their magnetic properties › H01F 30 - Fixed transformers not covered by group
Patents for H01F 30 - Fixed transformers not covered by group (4,595)
09/2000
09/20/2000EP1037221A2 Coil device and switching power supply apparatus using the same
09/20/2000CN2397582Y Railway traction substation transformer for changing three-phase into four-phase
09/13/2000CN2396491Y Winding 3-D transformer
09/13/2000CN2396490Y Small air-immersed transformer for controlling or lighting
09/07/2000DE10001633A1 Coil bobbin for AC adaptor, has attachment hole into which lead of electronic component is insertable and formed on each substrate attachment groove at lower portion of flange
09/06/2000CN2395373Y Back three phase commutator type welded transformer
09/05/2000US6114937 Integrated circuit spiral inductor
08/2000
08/24/2000DE19723958C2 Spannverband Pressure assembly
08/23/2000CN2393209Y Current-limiting induction-regulation reactor
08/16/2000CN2392243Y Transformer for phase loss or electricity cut off
08/15/2000CA2240768C Triple core toroidal transformer
08/09/2000CN2391290Y Backpack rectifier welded transformer
08/08/2000US6101113 Transformers for multipulse AC/DC converters
08/08/2000US6100781 High leakage inductance transformer
08/02/2000EP0864165B1 High isolation power transformer
07/2000
07/26/2000EP1022749A1 Electrostatic capacitive divided-voltage transformer
07/26/2000EP1021811A1 Superconducting coreless transformer
07/26/2000CN1054961C Sealing device
07/20/2000WO2000042624A1 High-voltage transformer
07/19/2000EP1020974A1 Device for connecting a station to an electrical power network especially for automobiles
07/19/2000EP1019922A2 Transformer/reactor
07/19/2000CN2388694Y Three-phase four-column voltage non-interfering box-type transformer
07/12/2000EP1018127A1 Power distribution network incorporating a voltage support transformer and process of use
07/12/2000CN2387621Y Circular transformer
07/12/2000CN2387620Y Amorphous alloy drying transformer
07/11/2000US6087822 Power transformer with internal differential mode distortion cancellation
06/2000
06/28/2000EP1014397A1 High leakage inductor for a switched power converter
06/22/2000WO2000036616A1 A dry-type air-core reactor with magnetic shield
06/20/2000US6078239 High frequency transformer
06/14/2000CN1256786A Power distributing transformer-switch combination
06/13/2000US6075431 Converter transformer
06/08/2000WO2000033331A1 Wire core inductive devices
05/2000
05/31/2000CN2381003Y High-performance dry transformer
05/25/2000WO2000030239A1 Electric motor
05/25/2000WO2000030130A1 Endless core for a multiphase transformer and a transformer incorporating same
05/25/2000CA2350491A1 Electric motor
05/25/2000CA2350485A1 Endless core for a multiphase transformer and a transformer incorporating same
05/24/2000CN2379884Y Amorphous alloy magnet core and dry type transformer
05/23/2000US6067002 Circuit substrate with a built-in coil
05/17/2000CN1253365A Technology for manufacturing dry-type three-phase transformer with flame-retarding paper
05/16/2000US6064291 Converter transformer
05/10/2000CN1252644A Tranformer for circulation convertor
05/04/2000WO2000025327A1 A three-phase transformer
05/03/2000CN2376660Y Power source transformer for air plasma cutting machine
05/03/2000CN1052098C Improvement of transformer/inducer
04/2000
04/26/2000EP0995339A1 Single turn induction heating coil
04/25/2000US6054329 Method of forming an integrated circuit spiral inductor with ferromagnetic liner
04/20/2000WO2000022634A1 Power transformer with internal differential mode distortion cancellation
04/20/2000DE19947285A1 Auto-transformer with uninterrupted voltage step conversion for illumination systems
04/12/2000EP0993008A1 A combination apparatus of distribution transformer and switch
04/12/2000CN1250217A Electric distribution transformer and distribution connection method
04/11/2000US6049266 Single-phase three-wire type transformer
04/11/2000US6049163 Discharge lamp unit with RF shield primary coil
04/09/2000CA2283359A1 Power transformer with internal differential mode distortion cancellation
04/05/2000EP0991091A1 High voltage transformer
04/05/2000CN1249522A High-voltage transformer
04/04/2000US6046663 Transformer and coil bobbin therefor
03/2000
03/29/2000EP0844626A4 Transformer
03/29/2000CN2371656Y Power supply device for three-phase to single-phase treble frequency transformer
03/22/2000EP0986821A1 Inductive component
03/16/2000WO2000014861A1 Rectifying/smoothing circuit and double-ended converter
03/08/2000EP0984462A2 Electrical transformer
03/08/2000CN1050214C Inductive transformer and its producing method
03/02/2000WO2000011687A1 Planar transformer
03/02/2000CA2342164A1 Planar transformer
03/01/2000CN2366956Y Hexagonal, 18 window, variable phase and variable frequency transformer
03/01/2000CN2366955Y Hexagonal,six window, variable phase and variable frequency transformer
03/01/2000CN1245962A High-voltage transformer for microwave oven
02/2000
02/23/2000EP0981141A1 High-voltage transformer
02/23/2000EP0980857A1 A Mn-Zn ferrite
02/23/2000EP0980856A1 A Mn-Zn Ferrite
02/23/2000CN1049757C Three phase changing four phase balance transformer
02/23/2000CN1049756C Multi-layer opened hollow inductor coil
02/16/2000EP0980035A1 Single-phase three-wire type transformer
02/09/2000CN2363364Y Four-post iron core three-group no-interference combined transformer
02/08/2000US6023214 Sheet transformer
02/03/2000WO2000005786A2 Power cord provided with a power cord transformer
02/02/2000EP0977214A1 Amorphous metal core transformer
02/02/2000CN1243324A Transformer
01/2000
01/27/2000WO2000004612A1 High pulse rate pulse power system
01/26/2000CN2360918Y Lamination three-dimensional transformer
01/19/2000CN2359790Y Magnetic shielding dry-type air reactor
01/19/2000CN1241793A Material-economizing transformer
01/12/2000CN2358535Y Electronic transformer without framework coil
01/05/2000DE19810780C1 Toroidal air coil design e.g. for converter thyristors and GTO thyristors inductive circuits
01/04/2000CA2016159C Harmonic reduction for multi-bridge converters
12/1999
12/30/1999DE19928567A1 Transformer with compact housing, e.g. for motor vehicle lamp
12/30/1999DE19818132A1 DC transformer for motor vehicle window heater
12/22/1999CN2355414Y Phase and frequency varying transformers with structure of rectangular multiple punches
12/07/1999US5999078 Transformer and rectifier module with half-turn secondary windings
12/02/1999DE19902346A1 Multiple way switch for microwave frequency signals
11/1999
11/23/1999US5991178 VHV transformer/rectifier for surface mounting
11/17/1999EP0956571A1 Transformer with voltage regulating means
11/11/1999WO1999057737A1 Transformer
11/09/1999US5982264 High frequency sheet-type transformer
11/09/1999US5982263 Higher frequency switch mode transformer
11/09/1999US5982262 Phase shifting transformer with low zero phase sequence impedance
11/03/1999CN2347250Y 环形变压器 Toroidal transformer
10/1999
10/27/1999CN2346048Y Lightning protection transformer
10/26/1999US5973307 High voltage transformer with side insulation support and formed with through-holes for lead wires
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