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)
11/2003
11/25/2003US6653924 Transformer with controlled interwinding coupling and controlled leakage inductances and circuit using such transformer
11/20/2003DE10034229C2 Transformator für einen Mikrowellenofen und Verfahren zu dessen Herstellung Transformer for a microwave oven and method for its production
11/19/2003CN2587046Y Decompressing starting autotransformer
11/18/2003US6650557 18-pulse rectification system using a wye-connected autotransformer
11/13/2003WO2003094365A2 Construction of medium voltage power line data couplers
11/13/2003US20030210123 Toroidal core for a toroid
11/13/2003CA2485094A1 Construction of medium voltage power line data couplers
11/12/2003EP1360708A2 Toroidal inductive devices and methods of making the same
11/12/2003CN2586233Y Four-channel or multichannel background light transformer structure
11/12/2003CN1455422A Cooling method and apparatus for furnace high-voltage transformer
11/11/2003US6646531 Coated coil assembly of a transformer
11/06/2003WO2003092147A1 Blocking oscillator converter arrangement
11/06/2003US20030206087 Magnetic system having three-dimensional symmetry for three phase transformers
11/04/2003US6642829 High-voltage transformer
11/04/2003US6642827 Advanced electronic microminiature coil and method of manufacturing
10/2003
10/30/2003US20030201859 Transformer
10/29/2003EP1357565A2 Method and device for cooling high voltage transformer for microwave oven
10/29/2003CN2583782Y Underground transformer
10/29/2003CN1452189A Phase-reversing transformer and phase inverter circuit
10/29/2003CN1126128C Transformer
10/28/2003US6639770 Current transformer and method for correcting asymmetries therein
10/28/2003US6639499 Inductance component in which a permanent magnet for applying a magnetic bias is arranged outside an excitation coil
10/23/2003US20030198067 Core structure and interleaved DC-DC converter topology
10/23/2003US20030197585 Core structure
10/23/2003US20030197583 Method and device for cooling high voltage transformer for microwave oven
10/23/2003US20030197441 Multiple-function pumping device for fountains, ornamental fountains and the like
10/23/2003CA2425631A1 Method and device for cooling high voltage transformer for microwave oven
10/22/2003EP1355328A1 Support for the assembly of inductive electronic components
10/22/2003CN2582128Y Urbanized combined transformer
10/21/2003US6636140 High-frequency large current handling transformer
10/15/2003CN2580577Y Improved transformer
10/15/2003CN1124625C Electric distribution transformer and distribution connection method
10/15/2003CA2425592A1 Isolating material element for the assembly of inductive electronic components
10/14/2003US6633493 Inherently short-circuit resistant power distribution system
10/14/2003US6633219 Coil for automated mounting
10/08/2003EP1351263A1 Combination of transformer and coil
10/05/2003CA2424476A1 Combination of transformer and coil
09/2003
09/25/2003WO2003079378A2 High impedance electrical transformer and manufacturing method
09/24/2003CN2575820Y Combined arc-extinguishing chamber for DC contactor
09/17/2003EP1344231A1 Transformer providing low output voltage
09/17/2003EP1344230A1 Medium frequency transformer
09/11/2003US20030169142 Magnetic-flux conduits
09/10/2003CN2572526Y Dry type transformer
09/10/2003CN2572525Y Multi-purpose multi-column multi-phase mutual low interference combined transformer
09/04/2003WO2003073446A1 Transformer
09/04/2003WO2002103887A3 Power converters
09/03/2003EP1340234A1 System, printed circuit board, charger device, user device, and apparatus
09/03/2003CN2570938Y Voltage transformer
09/02/2003US6614338 Inductor and method for manufacturing same
08/2003
08/26/2003US6611408 Electrical transformer
08/26/2003US6611190 Transformer for inverter circuit
08/20/2003CN2567748Y Multipurpose multi-cylindrical multi-phase low mutual interference combined transformer
08/20/2003CN1118836C Transformer for circulation convertor
08/19/2003US6608543 High pulse rate ignition system
08/14/2003US20030151484 High frequency transformer with integrated rectifiers
08/12/2003US6606020 Low cost method of making a high impedance electrical transformer and products of said method
08/07/2003US20030146815 Capacitive voltage transformer
08/06/2003CN2565121Y Multipurpose multi-column multi-phase low-mutual interference combined transformer
07/2003
07/30/2003CN2563731Y 同轴组合箱式变压器 Coaxial combination of box-type transformer
07/24/2003WO2003061125A1 Power modulator
07/24/2003US20030137382 Transformers
07/23/2003EP1329914A2 Method and apparatus for substantially reducing electrical earth displacement current flow generated by wound components without requiring additional windings
07/23/2003CN2562325Y Balancing transformer for conventing three phases into sigle phase
07/23/2003CN2562324Y Semi-resonance transformer
07/22/2003US6597269 Convergence coil structure for a deflection yoke and method of producing deflection yokes
07/17/2003WO2003058650A1 Low voltage, high current power transformer
07/17/2003US20030132825 Planar coil and planar transformer
07/16/2003CN2561058Y Open-ventilating environmental-protection wound core air-immersed transformer
07/15/2003US6594166 Step-up transformer
07/15/2003US6593837 Transformer apparatus
07/10/2003US20030128554 Power modulator having at least one pulse generating module; multiple cores; and primary windings parallel-connected such that each pulse generating module drives all cores
07/09/2003EP1325545A2 Electronic transformer/inductor devices and methods for making same
07/08/2003US6590469 High frequency, large bandwidth balun and method of manufacturing
07/03/2003US20030122646 Method and apparatus for substantially reducing electrical earth displacement current flow generated by wound components without requiring additional windings
07/02/2003EP1324357A1 Electromagnetic device and high-voltage generating device and method of producing electromagnetic device
07/01/2003US6587023 Electromagnetic induction device
06/2003
06/26/2003WO2003052246A1 Direct fuel-injected internal combustion engine having improved spark ignition system
06/26/2003US20030116671 Drum type core with discrete structure
06/25/2003CN1426590A Multi-layer multi-functioning printed circuit board
06/24/2003US6583706 Toroidal choking coil
06/24/2003US6583705 High current inductor and method for making same
06/24/2003US6583698 Wire core inductive devices
06/24/2003US6583697 Transformer
06/19/2003US20030112111 Three-phase transformer
06/05/2003US20030102948 Method for increased coupling coefficient in a pulse type transformer through coil configuration and varied core area
06/03/2003US6573821 System, printed circuit board, charger device, user device, and apparatus
05/2003
05/28/2003EP1315181A1 Transformer
05/28/2003CN1420505A 变压器 Transformer
05/27/2003US6570906 ARC furnace with DC arc and AC joule heating
05/22/2003US20030095026 Transformer
05/21/2003CN1419699A System, printed circuit board, charger device, user device, and apparatus
05/15/2003US20030090355 Transformer core
05/15/2003US20030088967 Endless core for a multiphase transformer and a transformer incorporating same
05/06/2003US6559750 Transformer and electrical device using the same
05/01/2003US20030080847 Low voltage, high current power transformer
04/2003
04/30/2003CN2548236Y Medium and small-sized transformer
04/30/2003CN1415111A Power conversion system utilizing wire core inductive devices
04/30/2003CN1414635A Double-layer symmetrical solid circuit transformer
04/29/2003US6556117 Multi-channel uniform output type transformer
04/17/2003WO2002059914A3 Toroidal inductive devices and methods of making the same
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