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)
10/1999
10/21/1999DE19816748A1 Schaltnetzteiltransformator für hohe Isolationsanforderungen bei kleinen zu übertragenden Leistungen Switching power supply transformer for high isolation requirements for small to be transferred benefits
10/20/1999EP0951025A1 Switched-mode power supply type transformer for high isolation requirements with low power to be transmitted
10/20/1999CN2344853Y Split-phase transformer
10/17/1999WO1999050860A1 Power distribution network incorporating a voltage support transformer and process of use
10/14/1999DE19814897A1 Inductive high-power component for frequency range above 1 kHz
10/13/1999CN2343658Y Inductive element
10/13/1999CN1045681C Passive power factor compensator
10/06/1999EP0948002A2 Container for a ring core transformer, preferably for a ground fault circuit interrupter
09/1999
09/29/1999CN2341252Y AC/DC compatible three-phase mono-body constant voltage transformer
09/28/1999US5959846 Modular surface mount circuit device and a manufacturing method thereof
09/28/1999US5959521 High-voltage transformer and a vehicle-lamp lighting-on device using the same
09/23/1999DE19906261A1 Sheet transformer
09/22/1999CN2340073Y Three-phase-two-phase balance transformer
09/22/1999CN1229257A Variable-phase, variable-frequency transformer capable of holding three-phase input current balance
09/14/1999US5950830 Packaging for patches
09/01/1999EP0939426A1 Magnetic core and deflection yoke having the same
09/01/1999CN2336465Y Single-three phase converting transformer
08/1999
08/18/1999EP0936637A2 Transformator
08/18/1999CN2334088Y Dry transformer
08/18/1999CN1226070A Three-balanced-weight three-junction transformer
08/18/1999CN1226069A Transformer
08/10/1999US5936988 High pulse rate pulse power system
08/04/1999CN2332048Y Three-phase distribution transformer
08/04/1999CN2332047Y Variable capacitance and energy saving transformer
08/03/1999US5933332 Converter transformer
07/1999
07/28/1999EP0932170A1 Cost-reduced transformer manufacture
07/27/1999US5929738 Triple core toroidal transformer
07/27/1999US5929735 Apparatus for facilitating mounting of an inductor assembly to a printed circuit board
07/21/1999CN2330050Y Three-phase dry-power transformer with circular section iron core
07/20/1999US5926083 Static magnet dynamo for generating electromotive force based on changing flux density of an open magnetic path
07/08/1999DE19814896A1 Electrical power transformer for high current of at least 1 kHz
07/07/1999CN2328088Y Balancing transformer for converting three phase source into double phase one
06/1999
06/30/1999CN2327059Y Hollow reactor
06/24/1999WO1999017016A3 High pulse rate ignition source
06/23/1999EP0923783A1 Single coil constitutive of windings for air-core transformers
06/17/1999WO1999017311A3 Transformer/reactor
06/16/1999EP0923092A2 Transformer
06/15/1999US5912792 Mounting construction of a tank-type lightning arrester for a neutral point of a transformer
06/09/1999CN2323461Y Phasing and frequency changing transformer capable of keeping input current balance
06/01/1999US5909167 Multi-phase transformer
05/1999
05/26/1999CN1217553A Method for mfg. of reciprocating transformer
05/19/1999EP0917163A2 Magnetic component assembly
05/19/1999CN2319906Y 改进型变压器 Improved transformer
05/19/1999CN1216853A Reactive compensation transformer
05/18/1999US5905373 Serial-modulized high voltage transformer
05/12/1999CN2318700Y Interlink coupling high-voltage impact isolation transformer
05/05/1999CN2317537Y Cement reactor
05/05/1999CN2317536Y Dry type reactor without magnetic core
04/1999
04/29/1999WO1999021199A1 Electric signal transmission line
04/21/1999CN1214522A Magnetic microstrip line and its application
04/20/1999US5895979 Power distribution network incorporating a voltage support transformer and process of use
04/14/1999CA2249827A1 Magnetic component assembly
04/08/1999WO1999017311A2 Transformer/reactor
04/08/1999WO1999017016A2 High pulse rate ignition source
04/07/1999EP0907190A2 Inductive component and method of manufacturing same
04/07/1999CN1213147A Three-phase energy-saving transformer
04/07/1999CN1042867C Transformer coil and its manufacturing method
03/1999
03/24/1999CN2311843Y Winding iron core for toroidal transformer
03/23/1999US5886516 Series resonant converter transformer assembly having integral inductor tank elements
03/23/1999US5884990 Integrated circuit inductor
03/18/1999DE19738946A1 Core-less throttle coil
03/10/1999CN1210617A Converter transformer
03/10/1999CN1210605A Modular core, self-powered powerline sensor
03/10/1999CN1210390A Sub-resonant series resonant converter having improved form factor and reduced EMI
03/02/1999US5877669 Flyback transformer having a flexible coil winding structure and manufacturing process thereof
03/02/1999US5877668 Flyback transformer having a flexible coil winding structure and manufacturing process thereof
02/1999
02/25/1999DE19835639A1 High frequency transformer with strip winding for television transmission
02/23/1999US5874713 Single turn induction heating coil
02/16/1999CA2131971C Motor control system and apparatus for providing desired three-phase voltage therein using a main transformer energized through an auto transformer
02/10/1999EP0896346A1 Methods of manufacturing a magnetic device and tool for manufacturing the same
02/10/1999CN1207566A Full constant power output transformer for energy-saving ore smelting furnace
02/03/1999EP0895256A1 Article comprising an inductive element with a magnetic thin film
02/03/1999CN2306556Y Epoxy resin vacuum poured copper conductor square coil transformer
02/02/1999US5867100 Air Coil a security badge and a transponder
01/1999
01/21/1999WO1999003307A1 Single turn induction heating coil
01/21/1999DE19724314A1 Electronic transformer e.g. for lighting units for installing in furniture items
01/07/1999DE19829424A1 Unipolar filter for reducing zero currents in electric power supply
12/1998
12/30/1998EP0887815A1 Converter transformer
12/30/1998CN2302588Y Energy-saving arc furnace transformer
12/30/1998CN1203692A Flexible coil winding structure of flyback transformer and manufacturing process thereof
12/23/1998EP0886286A2 High-voltage transformer and a vehicle-lamp lighting-on device using the same
12/23/1998CN1202977A Flexible coil winding structure of flyback transformer and manufacturing process thereof
12/10/1998WO1998056016A1 Inductive component
12/09/1998EP0883326A2 Transformer for piezoelectric speaker and piezoelectric speaker operative with said transformer
12/09/1998EP0883144A2 Pressure assembly
12/09/1998CN1041138C Multifunctional impedance matching tractive transformer
12/08/1998US5847634 Article comprising an inductive element with a magnetic thin film
12/02/1998EP0881759A2 Sub-resonant series resonant converter having improved form factor and reduced emi
12/02/1998EP0881647A1 Transformer with controlled interwinding coupling and controlled leakage inductances and circuit using such transformer
12/02/1998EP0807311B1 Device for voltage control
12/02/1998CN2299382Y Resin pouring annular transformer
12/02/1998CN2299381Y Neon lamp transformer with one-end earthing output
12/02/1998CN1200585A Three phase non-disturbed type distribution transformer and switching combination arrangement
11/1998
11/26/1998WO1998053466A1 A combination apparatus of distribution transformer and switch
11/25/1998CN2298593Y Gas insulating power transformer with roll iron core structure
11/25/1998CN2298592Y Capacity adjustable energy saving electric furnace transformer
11/17/1998US5838220 Toroidal transformer with space saving insulation and method for insulating a winding of a toroidal transformer
11/10/1998US5835367 Distributed plannar-type high voltage transformer
11/04/1998EP0875908A1 High frequency transformer
11/04/1998EP0875052A1 Modular core, self-powered powerline sensor
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