H01F 29 - Variable transformers or inductances not covered by group

Patents for H01F 29 - Variable transformers or inductances not covered by group (3,889)
01/2007
01/09/2007	US7161456 Systems and methods for driving large capacity AC motors
01/03/2007	CN1889208A Regulating transformer brush assembly guiding mechanism
01/03/2007	CN1293580C Composite magnetic body, magnetic element and mfg. method thereof
12/2006
12/28/2006	WO2004064084A3 Self-damped inductor
12/28/2006	US20060290453 Transformer
12/27/2006	EP1456728B1 Device with controllable impedance
12/27/2006	CN2852345Y Brush holder
12/27/2006	CN2852344Y Loaded voltage-regulating amorphous alloy power transformer
12/27/2006	CN2852343Y Three-phase self-coupled voltage-regulating amorphous alloy transformer
12/27/2006	CN1885454A Mounting plate for fixed contact of tapping selector of combined on-loading tapping switch
12/27/2006	CN1885453A Fixed contact of tapping selector of combined on-loading tapping switch
12/27/2006	CN1885452A Strip-like non-excitation tapping switch
12/20/2006	CN1881489A Adjustable inductance
12/13/2006	CN2847488Y Loaded capacity regulating voltage regulating power transformer
12/12/2006	US7148781 Landscape lighting transformer having increased loading features
12/12/2006	US7148779 Pulse type transformer with increased coupling coefficient through configuration of plural primary windings
12/07/2006	DE102005058793B3 Switching controller for a switch-monitoring unit for switching between step-up transformer windings has cam discs connected to Maltese wheel and operating cam switches
12/06/2006	CN2845139Y Clock-face lick mechanic indicator of electric operating mechanism of loaded band switch
12/06/2006	CN2845130Y Decimal inductance device with plural stepping discs
12/06/2006	CN2845129Y Oil filter of loaded distribution switch
12/05/2006	US7145760 Tap changer monitoring
11/2006
11/29/2006	CN2842679Y Series-parallel voltage-regulation transformer
11/29/2006	CN2842678Y Non-cut-off inverting device for multiple no-load voltage ratio carrent mutual-inductor
11/29/2006	CN1871674A High-voltage transformer
11/23/2006	DE102005048308B3 Mechanical switch contact has pivotable contact housing mounted on insulating support via bearing with two parallel electrically connected contact fingers enclosing fixed contacts and mechanically connected to and actuated by pivot lever
11/22/2006	EP1723658A1 Method and article of manufacture for designing a transformer
11/22/2006	CN1868008A Variable inductor
11/22/2006	CN1866441A Off-circuit tap-changer with shielding device
11/16/2006	WO2006120919A1 Change action monitoring device for on-load tap changers
11/08/2006	CN2836198Y Contact pressure regulator for eliminating inter-turn short circuit current
11/08/2006	CN1858875A Combined mechanical end position limiting mechanism
11/02/2006	EP1082735B1 Variable inductor
11/01/2006	CN2833830Y Decade inductance box
10/2006
10/19/2006	DE202006012536U1 Transformer has core at which several primary coils and one or more secondary coils are provided whereby first primary coil from first wire exhibits larger wire size than second primary coil from second wire
10/18/2006	CN2829037Y Silicon controlled flux self-compensating adjustable inductance reactor
10/18/2006	CN1280842C Permanent magnet, magnetic core having magnet has bias magnet and inductance parts using the core
10/12/2006	DE102005027524B3 Power accumulator for on-load tap changer, has lift and leaping carriages with three linear bearings, and cam follower coinciding with actuator such that leaping carriage is pushed into new final position by rotation of eccentric plate
10/11/2006	EP1449043B1 Controllable transformer
10/10/2006	CA2249115C Tap selector
10/05/2006	WO2006103268A2 An on-load tap changer
10/05/2006	US20060220772 Noise suppressor
10/04/2006	CN2824266Y Panel for mounting controlling part of electric mechanism of loaded tap switch
10/04/2006	CN2824265Y Loaded tap switch insulation tube
10/04/2006	CN1841583A Combined type on-load tap-changer
09/2006
09/27/2006	CN2821821Y Drum shape no-exciting tap changer
09/27/2006	CN2821820Y Movable contact of drum shape no-exciting tap changer
09/26/2006	US7113068 Winding structure of inductor used in power factor correction circuit
09/20/2006	CN2819640Y Controllable inductance of AC excited magnetic amplifier
09/06/2006	CN2814635Y Improved electric transformer
09/05/2006	US7102479 Output choke for D.C. welder and method of using same
08/2006
08/30/2006	CN2812263Y Operating mechanism for non-excited tap switch
08/29/2006	US7098765 Ignition coil having magnetic flux reducing inner structure
08/24/2006	WO2006087401A1 Tap changer for medium-/low-voltage transformers
08/24/2006	US20060187574 Integral transformer junction module
08/23/2006	CN2810026Y Automatic loaded voltage regulation device for power distribution network
08/23/2006	CN2810025Y Automatic loaded voltage regulation distribution transformer
08/22/2006	US7095629 Switching power supply circuit
08/17/2006	DE102005027527B3 Energy storage device e.g. for load-tap changer switch for transformer, has first and second rollers which are moved in stages by step-change slide
08/17/2006	DE102005009193B3 Converter for switching between different coil terminals of a stepper transformer for adjusting voltage having a shaft driven by a hand wheel or an allen key
08/16/2006	CN2807428Y Auto-transformer of adjustable transformer
08/08/2006	US7089145 Tap changer condition diagnosing
08/02/2006	CN2802684Y Circular electric mechanism of tap changer for transmission switch
08/02/2006	CN1812678A System and method for driving a multi-lamp
08/01/2006	CA2175444C Tap changer
07/2006
07/27/2006	DE112004001824T5 Schieber zur Wahl der Spulenspannung und zur ortsfesten Verriegelung der Spule Shifter for selecting coil voltage and locking the coil to the stationary
07/26/2006	CN2800468Y Combined type on-load tap-changer
07/26/2006	CN2800455Y Combined type on-load tap-changer
07/26/2006	CN2800454Y On-load tap-changer oil chamber
07/20/2006	DE202005017998U1 Elektrisches Bauelement mit dem Effekt eines variablen Luftspalts Electrical component with the effect of a variable air gap
07/19/2006	EP1681692A1 High-voltage transformer
07/13/2006	US20060152324 Magnetically controlled inductive device
07/13/2006	DE112004001807T5 System und Verfahren zum Verbinden einer demontierbaren Spule mit feststehenden Spulenanschlusskontakten System and method for connecting a detachable coil with fixed coil connecting contacts
07/05/2006	EP1676284A1 Controllable inductive device
07/05/2006	CN2793889Y Zero-adjusting and self-coupling transformer and voltage adjuster
06/2006
06/29/2006	WO2006068503A1 Reduction of third harmonics
06/28/2006	EP1675139A2 Power source for plasma device
06/28/2006	CN2791844Y Excitation-free tap changer
06/28/2006	CN1794554A Power source for plasma device
06/28/2006	CN1794382A Method of increasing electric appliance power factor
06/23/2006	CA2506051A1 Power source for plasma device
06/21/2006	EP1671338A1 Ignition coil for a spark ignition engine
06/21/2006	CN2789901Y Three-phase adjustable reactor
06/21/2006	CN1790565A Non-contact controllable reactor
06/21/2006	CN1790562A Magnetic core comprising a bond magnet including magnetic powder whose particle's surface is coated with oxidation-resistant metal
06/14/2006	DE10260246B4 Spulenanordnung mit veränderbarer Induktivität Coil arrangement with variable inductance
06/13/2006	US7061356 Controllable transformer
06/07/2006	EP1664960A2 Preventive maintenance tapping and duty cycle monitor for voltage regulator
06/01/2006	WO2006056040A1 Saturation control of electric machine
06/01/2006	US20060114697 Switching power supply circuit
06/01/2006	CA2586424A1 Saturation control of electric machine
05/2006
05/31/2006	CN2785010Y AC voltage compensator
05/26/2006	WO2006055598A1 Method and article of manufacture for designing a transformer
05/24/2006	CN1776838A Local magnetic saturation electrically-tuned core reactor
05/24/2006	CN1257593C Electromagnetic device
05/24/2006	CN1257519C Energy accumulator for a sequence switch
05/17/2006	CN1256739C On load tapping switching transformer
05/10/2006	CN1771570A Inductively powered apparatus
05/09/2006	US7042323 Signal transformer and method for operating such a signal transformer
05/09/2006	CA2216276C On-load tap changer of a step switch
05/03/2006	CN1766667A Method for measuring switch time of multi-contact switch and switch time measuring circuit

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