| Patents for H01F 29 - Variable transformers or inductances not covered by group (3,889) |
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| 07/25/2007 | CN2927283Y Dry loaded adjusting transformer |
| 07/25/2007 | CN101005228A Electric energy increasing changer |
| 07/18/2007 | CN101000824A Electric welder |
| 07/11/2007 | CN2922098Y Field-free tap changer with shield |
| 07/10/2007 | US7242275 Variable inductor |
| 07/04/2007 | CN2919494Y Novel sealed structure of on-load tapping changing switch oil chamber |
| 07/04/2007 | CN2919483Y Energy converting winding |
| 07/04/2007 | CN2919482Y Controllable combined reactor |
| 06/28/2007 | WO2007073316A1 A method and device for controlling of a magnetic flux |
| 06/27/2007 | CN2916896Y Integral moving contact mounting bracket for on-load tapping switch |
| 06/27/2007 | CN2916874Y 可调式电抗器 Adjustable Reactor |
| 06/27/2007 | CN1989580A Multi-voltage power transformer for the high-voltage electricity transmission network |
| 06/27/2007 | CN1988074A Carbon brush conducting structure of autotransformer |
| 06/27/2007 | CN1988073A Transformer with split box structure |
| 06/20/2007 | CN2914299Y Sector zero excitation tap switch |
| 06/20/2007 | CN2914278Y Single-phase auto-powerstat |
| 06/20/2007 | CN2914277Y Shifting coil voltage regulator on zero voltage |
| 06/13/2007 | CN2911936Y Semi-enclosed drum-shaped shunting selector |
| 06/13/2007 | CN2911907Y Adjustable reactor able to be live continuously regulated |
| 06/13/2007 | CN2911906Y Controllable 3-phase combined reactor |
| 06/13/2007 | CN2911905Y Three-phase controllable reactor |
| 06/13/2007 | CN2911904Y Roller-type electrical brush assembly for regulating transformer |
| 06/13/2007 | CN1979703A Excitation-free positive-negative voltage-regulation tap changer |
| 06/13/2007 | CN1321428C High-speed low-harmonic controllable reactor |
| 05/30/2007 | CN2906859Y Welding machine with improved structure |
| 05/30/2007 | CN2906858Y Shielding cover for excitation-less tap switch |
| 05/30/2007 | CN1973344A A diverter switch, a method for operating such a switch and use of such a switch |
| 05/30/2007 | CN1971778A Single-phase self-coupling on-load voltage-regulating transformer |
| 05/23/2007 | CN2904239Y Multi-layer winding voltage regulator |
| 05/23/2007 | CN1967745A Reactance device |
| 05/17/2007 | US20070109089 Self-damped inductor |
| 05/16/2007 | EP1784700A1 Improved apparatus and method for control of high intensity discharge lighting |
| 05/16/2007 | CN2901546Y Convenient tap switch safety protective coupling |
| 05/16/2007 | CN2901528Y Continuous adjustable reactor for inductive value |
| 05/16/2007 | CN2901527Y Energy saving transformer |
| 05/16/2007 | CN2901526Y Dry end voltage regulation transformer |
| 05/16/2007 | CN2901525Y Variable magnetic flux regulating capacity transformer |
| 05/16/2007 | CN2901524Y Variable magnetic flux series and parallel regulating capacity transformer |
| 05/16/2007 | CN2901523Y Loaded regulating voltage combined transformer |
| 05/10/2007 | WO2006103268A3 An on-load tap changer |
| 05/09/2007 | CN2899060Y Controllable resistor |
| 05/09/2007 | CN2899059Y Bar non-excited distribution switch |
| 05/09/2007 | CN2899058Y Disk non-excited distribution switch |
| 05/09/2007 | CN2899055Y Capacity-adjusting transformer |
| 05/09/2007 | CN1959877A Tertiary winding voltage regulating rectifier transformer of twelve phases |
| 05/03/2007 | WO2007049604A1 Power transmission device, stage device, exposure apparatus, and method for manufacturing device |
| 05/02/2007 | EP1779397A1 A diverter switch, a method for operating such a switch and use of such a switch |
| 05/02/2007 | CN2896468Y Staged loaded pressure-regulation switch |
| 05/02/2007 | CN1314057C Tranformer of voltage regulation and adjustment through control of main magnetic flux |
| 04/26/2007 | US20070090709 High-voltage transformer |
| 04/18/2007 | EP1775740A1 Multi-voltage power transformer for a high-voltage electric power transmission network (politrafo) |
| 04/18/2007 | CN2891250Y Main contact of combined heavy current switch of onload tapping switch |
| 04/18/2007 | CN2891248Y Contactless stop-position signal device |
| 04/18/2007 | CN2891237Y Linear reciprocating trigger-type quick-release mechanism in on-load tapping switch |
| 04/12/2007 | DE10224186B4 Durch eine Flüssigkeit zu isolierter und/oder gekühlter Stufenschalter zum Zuschalten und Abschalten von Wicklungen eines Transformators By a liquid to be insulated and / or cooled step switch for engaging and disengaging of windings of a transformer |
| 04/11/2007 | CN2888618Y Structure of ultra large rectifying transformer |
| 04/11/2007 | CN2888617Y Power distribution transformer which can be connected to two kinds of grids |
| 03/29/2007 | WO2007035111A1 Stabilizing winding for mvb in tn and tt grids |
| 03/29/2007 | WO2004025703A3 Active method and system of establishing electrical contact |
| 03/29/2007 | US20070069845 Ignition coil for a gasoline engine |
| 03/28/2007 | EP1768137A1 Variable inductor |
| 03/28/2007 | CN1937116A On-line oil-filtering apparatus of loaded tap changer |
| 03/21/2007 | EP1452076B1 Programmable system for stabilising and regulating voltage in particular for the improved management of lighting units using fluorescent bulbs and like |
| 03/21/2007 | CN2881911Y Contact system of non-excitation tap changer |
| 03/21/2007 | CN2881910Y Adjustable reactance energy-saving coil |
| 03/21/2007 | CN1933056A Controlled reactor with compensation winding |
| 03/21/2007 | CN1933055A Non-field cage-shape tap changer for transformer |
| 03/21/2007 | CN1933054A External electric supply controllable reactor |
| 03/21/2007 | CN1933053A Self-feeding controllable transductor |
| 03/20/2007 | US7193495 Magnetically influenced current or voltage regulator and a magnetically influenced converter |
| 03/15/2007 | WO2007029224A1 Fault current limiters (fcl) with the cores saturated by superconducting coils |
| 03/14/2007 | CN2879374Y Modified self-coupled transformer carbon brush structure |
| 03/14/2007 | CN2879373Y No-excitation double-row contact strip-type tapped switch |
| 03/14/2007 | CN2879372Y No-excitation linear voltage-adjusting strip-type tapped switch |
| 03/07/2007 | CN2877185Y Halogen lamp with adjustable transformer |
| 03/07/2007 | CN2877129Y Multipurpose welder |
| 02/28/2007 | CN2874732Y Brush frame module |
| 02/28/2007 | CN2874731Y Brush frame module |
| 02/28/2007 | CN2874730Y Brush frame module |
| 02/28/2007 | CN2874729Y Central conductive ring insulation protector of tapping selector of loaded tapping switch |
| 02/28/2007 | CN1302493C Method of lowering impact induction potential of large volume autotransformer |
| 02/15/2007 | DE102006008338B3 Load-tap changer with power storage spring e.g., for variable transformers, has power storage spring as pressure spring supported on end by fixed spring abutment |
| 02/14/2007 | CN2870117Y Integral bridging selector base of loaded briding switch |
| 02/14/2007 | CN2870115Y Composite cam mechanism of loaded bridging switch |
| 02/14/2007 | CN2870109Y Local magnetic saturation electric adjusted iron-core reactor |
| 02/14/2007 | CN2870108Y Integral mounting bottom-plate of loaded bridging switch bolt-releasing mechanism |
| 02/14/2007 | CN2870107Y Direction-changing drive mechanism of combined loaded bridging switch |
| 02/14/2007 | CN1913305A Coupling pole generator |
| 01/31/2007 | CN1905094A Non-exciting reversing change-over voltage regulating strip-shape tap switch |
| 01/25/2007 | DE102005031359B3 Stufenschalter Tap changer |
| 01/24/2007 | CN2862287Y On-load tapchanger of transformer without electric arc |
| 01/24/2007 | CN1901107A Variable reactor |
| 01/23/2007 | US7166853 Active method and system of establishing electrical contact |
| 01/18/2007 | DE102005033925A1 Insulating-fluid-filled step switch for power transformer, uses movement of bellows to accommodate changes in volume of insulating fluid |
| 01/17/2007 | CN2859871Y Link motion mechanism of manostat carbon-brush holder |
| 01/17/2007 | CN2859782Y No-excitation electric clathrate tapping switch |
| 01/17/2007 | CN2859764Y High capacity loaded capacity-regulated power transformer |
| 01/16/2007 | US7164340 Transformer for switching power supply |
| 01/10/2007 | CN2857180Y Shielding cover of non-excited tap switch |
| 01/10/2007 | CN2857172Y Transformer |