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)
01/2006
01/04/2006CN2750434Y H level environment-friendly type ceramic insulation dry-type power transformer
01/04/2006CN1716469A Multiple lamp tube driving device
01/04/2006CN1235243C High-tension transformer
01/03/2006US6982623 Step-up transformer for magnetron driving
12/2005
12/29/2005DE102004025212A1 Fully automatically manufacturable high frequency transformer has support with core and at least one contact point electrically connected to one end of winding wire with associated conducting track on circuit board
12/28/2005EP1610350A2 Welding transformer
12/28/2005EP1609553A1 Power source for high current welding
12/28/2005CN2749033Y Step-down coordination transformer
12/28/2005CN1712170A Power source for high current welding
12/22/2005WO2005122193A1 Planar high voltage transformer device
12/22/2005DE102004024337A1 Verfahren zur Herstellung nanokristalliner Stromwandlerkerne, nach diesem Verfahren hergestellte Magnetkerne sowie Stromwandler mit denselben A process for preparing nanocrystalline current transformer cores, magnetic cores produced by this process and with the same current transformer
12/22/2005CA2569786A1 Planar high voltage transformer device
12/21/2005EP1154446B1 High-voltage transformer
12/21/2005CN2747684Y Four-column three-phase change single-phase transformer
12/14/2005CN2746493Y High-voltage transformer
12/13/2005US6974905 Coaxial cable and transmission transformer using same
12/08/2005WO2005117039A1 Transformer
12/08/2005US20050271412 Fuser-controlling apparatus for generating a power synchronization signal and detecting power voltage
12/07/2005CN1704856A Fuser-controlling apparatus for generating a power synchronization signal and detecting power voltage
12/07/2005CN1230843C Multi-layer multi-function printed circuit board
12/07/2005CN1230840C System, printed circuit board, charger device, user device, and apparatus
12/01/2005WO2005114682A1 Current transformer core and method for producing a current transformer core
11/2005
11/30/2005CN1702783A Transformer
11/29/2005US6970065 Transformer and transformer unit having the same
11/29/2005US6969957 Ignition system for a high-frequency high-intensity discharge lamp system
11/24/2005US20050258925 Flyback transformer wire attach method to printed circuit board
11/23/2005EP1597739A1 Insulating element, toroidal core, toroidal core choke, and method for producing said toroidal core choke
11/23/2005CN2742544Y Epoxy resin casted single phase dry transformer
11/23/2005CN1700836A Electronic transformer for low-pressure lamp
11/22/2005US6967558 Inverter transformer and inverter circuit
11/17/2005WO2005109593A1 Method and equipment for the protection of power systems against geomagnetically induced currents
11/17/2005WO2005109457A1 40 ° phase-shifting autotransformer
11/17/2005CA2567519A1 Method and equipment for the protection of power systems against geomagnetically induced currents
11/16/2005CN1227680C Contra variant transformer and discharge lamp firing circuit using the same contra variant transformer
11/15/2005US6965280 Three way power splitter
11/10/2005US20050248324 Power supply for measuring the line impedance of underground cable
11/10/2005US20050247706 Microwave oven
11/09/2005CN2739777Y Power symmetrical anti-lightning energy-saving three phase transformer
11/03/2005US20050243582 DC transformer with an output inductance integrated on a magnetic core thereof and a DC/DC converter employing the same
11/02/2005CN1692456A Circuit using choke coil and choke coil
11/02/2005CN1691224A High-voltage transformer
11/02/2005CN1691223A Inductor and transformer
11/02/2005CN1691222A Transformer for switching power supply
10/2005
10/27/2005US20050237145 High-voltage transformer
10/27/2005US20050237143 Transformer for switching power supply
10/26/2005CN2736900Y Transformer and multiple lamp tubes driving system
10/20/2005US20050231317 Inductor and transformer
10/19/2005EP1097506B1 Switching power supply circuit
10/19/2005CN1684209A Transformer and lamp tube driving system using said transformer
10/19/2005CN1684208A 高压变压器 High-voltage transformers
10/18/2005US6956427 Electrically insulated switching element drive circuit
10/13/2005WO2005036720A3 Charge pump power supply with noise control
10/13/2005WO2005034318A3 Distributed floating series active impedances for power transmission systems
10/13/2005DE102004048793B3 Multiphase transformer for handling high voltage potential differences has single-aperture cores fitted adjacent each other in an axial direction
10/12/2005CN1682325A Electronic transformer/inductor devices and methods for making same
10/11/2005US6954129 Wire core inductive devices having a flux coupling structure and methods of making the same
10/06/2005WO2005093765A1 An inductive coupler
10/06/2005US20050219031 Method for RIAA correction of audio signal with use of transformer
10/06/2005US20050219029 Transformer
10/06/2005US20050219028 Transformers
10/05/2005CN2731668Y 自耦变压器 Autotransformer
10/05/2005CN1677583A 变压器 Transformer
09/2005
09/29/2005US20050212634 Overlapped superconducting inductive device
09/27/2005US6950291 Electromagnetic interference shielding for small magnetic devices
09/22/2005US20050206487 Inductive component and use of said component
09/21/2005EP1577911A1 Circuit using choke coil and choke coil
09/21/2005CN2727920Y Three-phase transformer with balancing function
09/21/2005CN2727919Y Dry type distribution transformer with 6 and 10kV level voltage transformation input
09/20/2005US6946946 Toroidal inductive devices and methods of making the same
09/15/2005WO2005086187A1 Transformer
09/14/2005EP1575066A2 Coil bobbin for at least two transformers
09/14/2005CN2726081Y Three-phase balance transformer
09/14/2005CN1669097A Inductive component and use of said component
09/14/2005CN1667764A High voltage transformer
09/07/2005CN2724169Y Back light power high voltage transformer
09/07/2005CN2724165Y High voltage silicon controlled trigger transformer
09/07/2005CN2724161Y Air gap transformer using liquid crystal back light source driver
09/07/2005CN1666415A Power modulator
09/07/2005CN1665112A Autocompensation and harmonic wave shielding converter transformer
08/2005
08/31/2005CN2722405Y Three-phase dry transformer
08/31/2005CN1661739A No filtering capacitor type feedback transformer in use for display of visual display tube
08/31/2005CN1661737A Coil component and method of manufacturing the same
08/31/2005CN1217427C Piezoelectric ceramic step-up transformer in bending vibration mode and its making process
08/30/2005US6937129 Transformer
08/25/2005WO2005078908A1 Electric oscillatory machine
08/25/2005WO2005078750A1 Thermally optimized torus inductor, used in triple-root circuit configuration for plasma drivers and ballasts
08/25/2005US20050184848 Coil component and method of manufacturing the same
08/25/2005DE10213593B4 Hochspannungspulstransformator High voltage pulse transformer
08/24/2005CN1216387C Transformer
08/23/2005US6933828 Devices and methods for protecting windings around a sharp edged core
08/23/2005US6933824 Polymer sheet core and coil insulation for transformers
08/18/2005WO2005076449A1 Switching power supply apparatus and electronic device using the same
08/17/2005CN1656579A Step-up transformer
08/17/2005CN1215559C Double-layer symmetrical solid circuit transformer
08/16/2005US6930584 Microminiature power converter
08/16/2005US6930578 Field adjustable phase shifting transformer
08/11/2005US20050174816 Circuit using choke coil and choke coil
08/11/2005US20050174210 Step-up transformer
08/10/2005EP1562204A2 Method and apparatus for substantially reducing electrical earth displacement current flow generated by wound components
08/10/2005CN2716987Y Cylinder closed type embedded transformer
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