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)
04/2003
04/16/2003EP1301932A1 High frequency transformer with integrated rectifiers
04/16/2003CN2545683Y 三相变压器 Three-phase transformer
04/10/2003WO2002101765A3 Devices and methods for protecting windings around a sharp edged core
04/02/2003CN2542390Y Cylindrical iron core electric welder
03/2003
03/19/2003EP0875908B1 High frequency transformer
03/18/2003US6535096 High pulse rate ignition system
03/13/2003WO2003022005A1 Arc furnace and method for converting waste
03/13/2003US20030048828 Arc furnance with dc arc and ac joule heating
03/13/2003US20030048168 High-current inductor and method for making same
03/13/2003US20030048165 High pulse rate ignition system
03/12/2003EP1196968B1 Coaxial pulser with solid dielectrics
03/12/2003CN1402270A Transformer for current converter
03/11/2003US6532161 Power supply with flux-controlled transformer
03/06/2003WO2003019588A1 Multiphase electrical induction machine of the static type
03/06/2003US20030043009 Multiple concentric coil wattage converter
03/04/2003US6529363 Capacitor integrated into transformer by multi-layer foil winding
02/2003
02/27/2003US20030038696 Transformer for inverter circuit
02/25/2003US6525951 Simplified wye connected 3-phase to 9-phase auto-transformer
02/25/2003US6525637 Transformer
02/20/2003WO2002023563A9 Advanced electronic microminiature coil and method of manufacturing
02/19/2003CN2537111Y Transformer for driving two A/D converters simultaneously
02/19/2003CN1398412A Transformer core
02/18/2003US6522231 Power conversion systems utilizing wire core inductive devices
02/12/2003EP1282904A1 Multi-layer, multi-functioning printed circuit board
02/11/2003US6518869 Power supply transformer for telephone
02/06/2003US20030025584 Inherently short-circuit resistant power distribution system
02/05/2003EP1282141A1 Process for manufacturing a toroidal coil with a magnetic core having a gap and casing performing this process
02/05/2003CN2534662Y 组合式变压器 Combined transformers
02/05/2003CN2534661Y Double-power source supply combined transformer
01/2003
01/30/2003US20030020579 3-Limb amorphous metal cores for three-phase transformers
01/29/2003EP1279177A1 A wound transformer core and a method and apparatus for manufacturing thereof
01/23/2003US20030016113 Inductive component made with rectangular development planar windings
01/23/2003US20030016112 Inductive component made with circular development planar windings
01/22/2003EP1277217A2 Transformer core
01/22/2003CN2532568Y Module structure for transformer
01/22/2003CN1393020A Electromagnetic device and high-voltage geratating device and method of producing electromagnetic device
01/16/2003WO2003005382A1 Transformer
01/15/2003CN2531508Y YnD three-phase monophase equilibrium transformer
01/15/2003CN1391240A Three phase-to-single phase balanced YnD transformer
01/14/2003US6507260 Electrical transformer for use with twisted pair
01/14/2003US6507131 High-voltage transformer
01/09/2003WO2003003391A1 E-i or e-e transformer
01/09/2003US20030006334 Process for manufacturing an electrical-power transformer having phase windings formed from insulated conductive cabling
01/08/2003EP1274104A1 Method of winding a three-phase transformer with coaxial cable and winding device therefor
01/02/2003EP1271576A1 Transformer E-I or E-E
01/02/2003EP1271575A1 Rectangular-development planar windings and inductive component made with one or more of said windings
01/02/2003EP1271574A1 Circular-development planar windings and inductive component made with one or more of said windings
01/02/2003EP1269494A1 A multiphase induction device
01/02/2003EP1269493A1 Transformer core
01/01/2003CN1388596A Piezoelectric ceramic step-up transformer in bending vibration mode and its making process
12/2002
12/27/2002WO2002103887A2 Power converters
12/27/2002WO2002103723A1 Transformer/rectifier arrangement
12/25/2002CN2528092Y Epoxy resin pouring dry type three-phase transformer
12/25/2002CN1387308A Three-phase to single-phase balance transformer
12/24/2002US6498736 Harmonic filter with low cost magnetics
12/24/2002US6498554 Auxiliary wiring structure for stabilizer
12/21/2002CA2390519A1 Rectangular-development planar windings and inductive component made with one or more of said windings
12/21/2002CA2390515A1 Circular-development planar windings and inductive component made with one or more of said windings
12/19/2002WO2002101765A2 Devices and methods for protecting windings around a sharp edged core
12/19/2002US20020190836 Devices and methods for protecting windings around a sharp edged core
12/19/2002US20020190697 18-pulse rectification system using a wye-connected autotransformer
12/18/2002CN2526854Y 电压传感器 Voltage sensor
12/18/2002CN1385868A High-voltage transformer with strong coupling
12/12/2002US20020186553 Converter device
12/12/2002US20020186112 Autotransformer-based system and method of current harmonics reduction in a circuit
12/11/2002EP1265460A2 Inverter transformer
12/11/2002CN2525659Y Single plase transformer
12/05/2002US20020180572 Electromagnetic device and high-voltage generating device and method of producing electromagnetic device
12/04/2002CN2524425Y Flexible starter for magnetic control motor with foil style windings
12/04/2002CN1095592C Material-super-economizing transformer
12/03/2002US6490180 Arrangement for transferring a control signal in a transformer
11/2002
11/28/2002US20020176268 Inverter transformer
11/27/2002CN2522998Y Amorphous alloy underground road-lamp transformer
11/27/2002CN2522997Y Omnibearing closure magnetic circuit transformer body
11/26/2002US6486765 Transformer
11/26/2002CA2241837C Modular core, self-powered powerline sensor
11/20/2002CN2521729Y Tuo phase-single phase transformer
11/14/2002US20020167385 Transformer with integrated inductor
11/13/2002EP1019922B1 Transformer/reactor
11/13/2002CN1379420A Capacitive transformer preventing thunderstruck and interference
11/07/2002WO2002089285A1 18-pulse rectification system using a wye-connected autotransformer
11/07/2002WO2002059918A8 Wire core inductive devices having a flux coupling structure and methods of making the same
11/06/2002EP1255346A2 Transformer with integrated choke coil
11/06/2002CN1378221A High frequency E-type and I-type film transformer and its preparing method
10/2002
10/31/2002WO2002086921A1 3-limb amorphous metal cores for three-phase transformers
10/31/2002US20020158742 Coil device
10/31/2002US20020158616 Power supply with flux-controlled transformer
10/30/2002EP1252698A1 Inherently short-circuit-proof power distribution system
10/24/2002US20020153981 Functional material-composite structural magnetic core
10/24/2002DE10119106A1 Transformer for switch-mode power supply, has three cores formed as separate components and with air gaps between
10/23/2002CN2518199Y Epoxy resin filled 24-pulse drying tracting commutating transformer
10/23/2002CN1376302A Earth cooled distribution transformer system and method
10/17/2002WO2002059915A3 Wire core inductive devices having a biassing magnet and methods of making the same
10/09/2002CN2515778Y Amorphous alloy underground distributing transformer
10/09/2002CN1373484A Threephase common-box current transformer
10/08/2002US6462975 Foldable transformer
10/03/2002WO2002078022A1 High frequency power inductance element
10/03/2002US20020140537 Electrical steel sheet for low-noise transformer and low-noise transformer
10/02/2002EP0993008B1 A combination apparatus of distribution transformer and switch
10/02/2002CN1372277A Surface installation type inductive element
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