| Patents for H01F 29 - Variable transformers or inductances not covered by group (3,889) |
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| 03/05/2014 | CN103620711A On-load tap changing device and energizing mechanism thereof |
| 03/04/2014 | US8665048 Inductor for high frequency applications |
| 02/26/2014 | CN203456263U Solid-state capacitance-modulating switch |
| 02/26/2014 | CN203456262U High-pressure roughly/finely-tuned on-load voltage-regulating power transformer |
| 02/26/2014 | CN103606445A Method for effectively reducing current passing through on-load tap-changer of transformers |
| 02/26/2014 | CN103606444A Multi-winding phase-shifting split dry-type transformer for ship or ocean platform |
| 02/20/2014 | WO2014026805A1 Load transfer switch, on-load tap changer, and method for switching an on-load tap changer |
| 02/20/2014 | DE102012107446A1 Lastumschalter, Laststufenschalter und Verfahren zum Umschalten eines Laststufenschalters Load switch, load tap changer and method for switching a load tap changer |
| 02/19/2014 | EP2698797A2 Apparatus and method for safe state retention |
| 02/19/2014 | EP2697808A1 A transformer provided with a taps panel, an electric- insulation method taps panel of a dry distribution transformer, and a taps panel for a dry distribution transformer |
| 02/19/2014 | CN203444959U Internally arranged online oil-filtering on-load tap changer |
| 02/19/2014 | CN203444958U Multi-tap volt regulation transformer |
| 02/19/2014 | CN103597559A Fluid insulated high voltage coil |
| 02/12/2014 | EP2695177A1 Tap changer and vacuum interrupter for such a tap changer |
| 02/12/2014 | CN103578712A 非晶合金变压器 Amorphous alloy transformer |
| 02/12/2014 | CN103578711A Zero-load voltage retainer for ultra high voltage transformer |
| 02/11/2014 | US8650411 Energy management for an electronic device |
| 02/06/2014 | WO2014021773A1 A device comprising a controllable earthing transformer |
| 02/06/2014 | WO2014019858A1 Step switch |
| 02/06/2014 | WO2014019828A1 Step switch |
| 02/05/2014 | EP2693453A1 Energy-storing mechanism with forcing mechanism, and on-load tap changing device |
| 02/05/2014 | CN203423079U On-load tap-changer load selector |
| 02/05/2014 | CN203423053U Transformer with automatic control function |
| 02/05/2014 | CN103563023A Supplementary transformer winding |
| 02/05/2014 | CN103559990A Double-extended-triangle descending voltage regulation rectifier transformer |
| 02/05/2014 | CN103559989A Series-transformer voltage regulation double V coil type rectifier transformer |
| 02/05/2014 | CN103559988A Multi-branching dry-type transformer for frequency conversion and speed control of ocean platform |
| 02/03/2014 | DE202013011233U1 Elektrischer Generator mit variabler magnetischer Sättigung Electric generator with variable magnetic saturation |
| 01/30/2014 | WO2014016532A2 Device for dynamically adjusting the voltage of an electrical network |
| 01/29/2014 | CN203415471U Bar-shaped tap switch |
| 01/29/2014 | CN203415439U Power driving mechanism used for vacuum on-load tap-changer |
| 01/29/2014 | CN203415391U Combined structure of on-load tap-changer electric operating mechanism and online oil filtering device |
| 01/29/2014 | CN203415390U Voltage-regulating transformer for realizing high-insulation and large-current on-load voltage regulation |
| 01/29/2014 | CN203415389U Magnetically controlled reactor with low harmonic characteristic |
| 01/29/2014 | CN103545097A Voltage regulation transformers, rectifier transformers and saturable reactors three-in-one shared oil tank |
| 01/22/2014 | EP2686931A1 Series current limiter using a magnetic circuit comprising holes and windows |
| 01/22/2014 | EP2686857A1 Load stepping switch |
| 01/22/2014 | EP2686746A2 Series voltage regulator with electronics protected against short-circuits by magnetic circuit-based decoupling using holes and windows |
| 01/22/2014 | CN203406152U Dual serial-parallel transition wiring apparatus of oil-immersed transformer |
| 01/22/2014 | CN103534776A A gearbox for a tap changer, a tap changer and a transformer |
| 01/22/2014 | CN103534768A Electronic tap changer |
| 01/22/2014 | CN103531337A Double-split rectifier transformer with field coils and tandem primary side coils |
| 01/22/2014 | CN103531336A Application of giant autotransformer and application method of giant autotransformer |
| 01/22/2014 | CN103531330A Method for achieving charged oil supplement of load switch |
| 01/15/2014 | CN203397984U Internal gear control mechanism of tap switch for transformer |
| 01/15/2014 | CN203397957U Shift indicating device of on-load tap-changer |
| 01/15/2014 | CN203397928U Vacuum on-load tap-changer |
| 01/15/2014 | CN203397927U Vacuum bubble switching mechanism and on-load tap-changer |
| 01/15/2014 | CN203397878U Magnetic integration device of transformer type controllable electric reactor |
| 01/15/2014 | CN203397855U Moving iron core of rotary iron core type adjustable reactor |
| 01/15/2014 | CN203397849U Novel controllable electric reactor based on two-phase magnetic material |
| 01/15/2014 | CN203397839U On-load voltage regulation power transformer |
| 01/15/2014 | CN103515072A Dual-high-voltage on-load tap changing single-phase testing transformer |
| 01/15/2014 | CN103515071A High-voltage coarse and fine regulation on-load voltage regulation power transformer |
| 01/08/2014 | EP2681751A1 Dynamically biased inductor |
| 01/08/2014 | CN203386599U Wide range multifunctional miniature transformer |
| 01/08/2014 | CN103500634A 220KV on-load voltage regulation single-phase testing transformer |
| 01/08/2014 | CN103500633A Magnetically controlled reactor |
| 01/01/2014 | EP2678874A2 Electronic tap changer |
| 01/01/2014 | CN203377118U Fixing structure of on-load tap-changer transition fixed contact |
| 01/01/2014 | CN103489600A Solid-state capacitance-adjusting switch |
| 01/01/2014 | CN103489599A Multistage continuous voltage-regulating twelve-pulse-wave rectifier transformer |
| 12/25/2013 | CN203367039U Sealing device of on-load tap-changer oil chamber contact |
| 12/25/2013 | CN203366968U Stereoscopic rolling iron core intelligent transformer |
| 12/25/2013 | CN203366967U Integrated high-frequency power transformer |
| 12/25/2013 | CN203366966U Transformer capable of conducting double-voltage input or output |
| 12/25/2013 | CN203366965U Multi-tap Scott split-phase voltage regulating magnetic voltage regulator |
| 12/25/2013 | CN103474260A Fan-shaped off-circuit tap-changer |
| 12/25/2013 | CN102394188B Coil spring mechanism of transformer capacity-regulation switch |
| 12/25/2013 | CN102306560B Connecting structure of fixed contact and tapping line of no-excitation tapping switch |
| 12/24/2013 | DE102011008964B4 Stufenschalter Tap changer |
| 12/19/2013 | DE102012105152A1 Laststufenschalter OLTC |
| 12/18/2013 | CN203351390U Mechanical-adjusting adjustable reactor |
| 12/18/2013 | CN203351389U High-low voltage on-load adjustable transformer device |
| 12/18/2013 | CN203351388U Inductance-adjustable open type air-core reactor |
| 12/18/2013 | CN203351387U Transformer voltage regulating device and tapping insulation plate thereof |
| 12/18/2013 | CN103460324A Tap changer and vacuum interrupter for such a tap changer |
| 12/18/2013 | CN103460311A Energy-storing mechanism with forcing mechanism, and on-load tap changing device |
| 12/11/2013 | EP2671298A1 Fault current limiter with shield and adjacent cores |
| 12/11/2013 | EP2671128A2 Stepping switch |
| 12/11/2013 | CN203338972U Novel load switch temporary supporting structure |
| 12/11/2013 | CN203338959U High-voltage automatic electrified adjustable reactor |
| 12/11/2013 | CN203338958U Adjustable variable transformer |
| 12/11/2013 | CN203338957U On-load capacity-regulating switch electrical endurance test transformer |
| 12/11/2013 | CN203337783U Insulation enhancing device for oil-immersed loaded capacitance-adjusting switch electrical endurance test |
| 12/11/2013 | CN103440972A Multi-winding multi-level gear shifting voltage-adjusting energy-saving transformer |
| 12/11/2013 | CN103440971A Novel isolation transformer for alternating-current frequency convertors |
| 12/11/2013 | CN101996753B Transformer-based circuit |
| 12/05/2013 | WO2013179475A1 Transformer device |
| 12/04/2013 | CN203325779U Tapping-off switch operation mechanism |
| 12/04/2013 | CN103426657A Switching structure between moving contacts and fixed contacts of tapping selector |
| 11/28/2013 | DE102012104379A1 Kraftspeicher für einen Laststufenschalter Power memory for a load tap changer |
| 11/27/2013 | CN203312051U Preselector actuating device used in preselector in tap switch |
| 11/27/2013 | CN203312020U Improved on-line oil filtering on-load tap switch |
| 11/27/2013 | CN203312019U Combined type on-line oil filtering on-load tap switch |
| 11/27/2013 | CN203312018U Intermediate transformer used for detection test |
| 11/27/2013 | CN103413662A Magnetic integration device of transformer type controllable electric reactor |
| 11/27/2013 | CN103413661A Adjustable transformer |
| 11/27/2013 | CN103413653A Novel controllable electric reactor based on two-phase magnetic materials |
| 11/27/2013 | CN103413647A Voltage-controlled adjustable inductor |