| Patents for H02P 13 - Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output (981) |
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| 10/15/2008 | CN101286722A Step control device and control method for antiskid crosspiece of loaded pressure regulating switch of transformer |
| 09/17/2008 | CN201118245Y Three phase oil immersion type magnetic control reactor |
| 09/17/2008 | CN201117417Y Flow equalizing autotransformer and automatic pressure regulating three phase balancing electricity saver |
| 09/17/2008 | CN101268531A Method and device for prevention and protection of electrical transformer against explosion and fire |
| 09/10/2008 | CN201113890Y Constant magnetic flux transmission and distribution transformer |
| 09/10/2008 | CN201113889Y Unsaturated symmetric magnetic circuit adjustable reactor |
| 09/03/2008 | CN101257277A Intelligent type inductive coil electric parameter N steps tuning method as well as product |
| 08/27/2008 | CN201107798Y Driver for electric motor with load tap changer |
| 08/20/2008 | CN100413206C AC step controlled parallel reactor device |
| 08/07/2008 | DE102007006394B4 Induktiver Drehübertrager Inductive rotating transformer |
| 08/06/2008 | CN101238423A Voltage adjuster |
| 08/06/2008 | CN101237205A Magnetic control stepless regulating transmission |
| 07/31/2008 | US20080180976 Selectable line voltage inverters and associated methods |
| 07/30/2008 | EP1949392A2 Method and device for prevention and protection of electrical transformer against explosion and fire |
| 07/30/2008 | CN101232178A Magnetic control type paralleling reactor field excitation branch line overvoltage protecting method and device |
| 07/24/2008 | DE102007003043A1 Transformationsvorrichtung Transformer |
| 06/25/2008 | CN100397766C Suitching type controller |
| 06/12/2008 | DE102007057236A1 Switchgear-control device for regulating closing process of switch gear for connecting three-phase core having three-phase inductor with three-phase power source, comprises main contact for individual phases of switchgear |
| 06/04/2008 | CN101192806A A control method of transformer excitation cycle and its control circuit |
| 05/28/2008 | CN201066823Y Power saver |
| 05/14/2008 | CN101179252A Method of regulating AC stepless controlled parallel reactor |
| 05/08/2008 | DE102007006394A1 Inductive rotating transmitter for computer tomography scanner, has functional unit with model for reproducing transmission function i.e. correlation, between electric characteristics at load and primary side of power transformer |
| 05/08/2008 | DE102007001414B3 Circuit arrangement for operating inductive load i.e. solenoid, of fuel injection valve, has protective circuit arranged parallel to capacitor and providing current path to limit voltage at capacitor in case of high voltage at capacitor |
| 04/30/2008 | DE102006050624A1 Reactance connecting device for transformer in electric arc furnace, has induction coil and standalone load switch for adjusting reactance of induction coil under load, where induction coil is provided with multiple tapping points |
| 04/23/2008 | EP1913454A1 A voltage regulation device |
| 04/23/2008 | CN201051717Y No contact binary transformer voltage-adjusting power supply |
| 04/23/2008 | CN201051444Y A self feed controllable reactor |
| 04/17/2008 | WO2007057916A8 Method and device for prevention and protection of electrical transformer against explosion and fire |
| 04/16/2008 | CN101162871A Method for prompting the range of air conditioner accommodating electric network electric voltage and frequency and device thereof |
| 04/03/2008 | DE102006045970A1 Verfahren und Vorrichtung zum Betreiben eines Transformators Method and apparatus for operating a transformer |
| 03/19/2008 | CN201039048Y Intelligent magnetic control stepless voltage-adjusting start control device of middle-pressure oil immersion power pump |
| 03/06/2008 | WO2008025162A1 System and method of loadflow calculation for electrical power system |
| 02/28/2008 | WO2008024068A1 A drive system for a tap changer |
| 02/20/2008 | CN201025593Y Single phase no excitation voltage adjusting combined transformer |
| 02/07/2008 | DE202007011005U1 Spannungsregulierungschaltung für eine nichtunterbrechbare Stromversorgung Voltage regulation circuit for an uninterruptible power supply |
| 02/06/2008 | EP1884965A1 Change action monitoring device for on-load tap changers |
| 02/06/2008 | CN201017254Y Direct current constant voltage constant current source special for high voltage velocity modulated valve device |
| 01/02/2008 | CN100359795C Series controlled transformer |
| 12/26/2007 | CN101093960A Minimizing saturation caused by power transfer in a communication system transformer |
| 12/20/2007 | DE202007012310U1 Schaltungsanordnung zur Umschaltung zwischen zwei Spannungsstufen einer Spannungsversorgung Circuitry for switching between two voltage levels to a voltage supply |
| 12/12/2007 | CN200990285Y Controllable reactor with compensating winding |
| 12/12/2007 | CN200990284Y External electric source controllable reactor |
| 12/05/2007 | CA2590137A1 Integrated power factor correction capacitance unit |
| 11/14/2007 | CN101072010A Micro-regulation circuit of transformer winding voltage |
| 11/01/2007 | WO2007096750A3 Universal input device for a tap changer |
| 10/24/2007 | CN101060303A A method for realizing the AC load continuous voltage regulating and keeping the sine wave pattern with the switching element |
| 10/11/2007 | DE202007009919U1 Netzgerät Power Supply |
| 10/11/2007 | DE102006016748A1 Gleichrichter zum Speisen einer Bremsspule Rectifier for powering a brake coil |
| 10/03/2007 | CN100341240C Controllable inductance of AC field magnetic amplifier and its application |
| 09/26/2007 | CN200953539Y Transformer solid loaded tap changer controller |
| 09/19/2007 | CN101039091A Method and apparatus for realizing load voltage regulation with a plurality of switching elements |
| 09/18/2007 | US7272302 PSC motor system for use in HVAC applications with field adjustment and fail-safe capabilities |
| 08/30/2007 | WO2007096750A2 Universal input device for a tap changer |
| 08/23/2007 | WO2007057916B1 Method and device for prevention and protection of electrical transformer against explosion and fire |
| 08/23/2007 | DE202006020014U1 Motorantrieb Motor drive |
| 08/01/2007 | CN101010848A 电功率流控制 Electric power flow control |
| 07/25/2007 | CN2927488Y Aadjuster of high-voltage frequency converter |
| 07/24/2007 | CA2251231C Proportional variable force solenoid control valve with armature damping |
| 07/12/2007 | WO2007057916A3 Method and device for prevention and protection of electrical transformer against explosion and fire |
| 07/04/2007 | CN2919677Y Intelligent electricity saving device |
| 06/13/2007 | EP1794861A1 Electric power flow control |
| 06/13/2007 | CN2912021Y Energy saving prefabricating transformer substation |
| 05/30/2007 | CN2907083Y Soft starter for high power industrial frequency transformer |
| 05/24/2007 | WO2007057916A2 Method and device for prevention and protection of electrical transformer against explosion and fire |
| 05/24/2007 | DE102004010394B4 Strom-Controller für induktive Last Current controller for inductive load |
| 05/16/2007 | CN2901527Y Energy saving transformer |
| 05/02/2007 | CN1314197C Increasable capacity integrated installation of high-low voltage variable frequency speed control |
| 04/25/2007 | EP1777805A1 Supply circuit for an AC motor |
| 03/21/2007 | CN1933056A Controlled reactor with compensation winding |
| 03/21/2007 | CN1933054A External electric supply controllable reactor |
| 03/21/2007 | CN1933053A Self-feeding controllable transductor |
| 03/14/2007 | CN2879522Y Industrial intelligent stabilized voltage-regulator |
| 02/20/2007 | US7180206 System for voltage stabilization of power supply lines |
| 02/15/2007 | WO2007017618A1 A voltage regulation device |
| 02/15/2007 | CA2620511A1 A voltage regulation device |
| 02/07/2007 | CN2867689Y Three-phase magnetron reactor |
| 01/31/2007 | CN2865134Y Three-phase controlled reactor controller |
| 01/17/2007 | CN1295855C Microcomputer control automatic pressure regulating device |
| 01/17/2007 | CN1295719C 远程智能型变压器 Remote Intelligent Transformer |
| 01/11/2007 | DE19925326B4 Schaltung für einen Wechselstromwandler Circuit for an AC converter |
| 01/09/2007 | CA2249975C Method of monitoring a tap selector |
| 12/27/2006 | CN2852526Y Burst control device for magnetic control reactor |
| 12/20/2006 | CN1880125A Outer rear-view mirror unit for a motor-vehicle with shape memory actuating means |
| 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 |
| 11/28/2006 | CA2248400C Power flow control and power recovery with rotary transformers |
| 11/28/2006 | CA2248399C Compensation for power transfer systems using variable rotary transformer |
| 11/23/2006 | US20060262580 Adapter and method of detecting and adjusting voltages and currents |
| 11/08/2006 | CN2836335Y Magnet controllable soft starter for high-voltage AC motor |
| 10/25/2006 | CN1282299C Reactance regulating circuit and its application |
| 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 |
| 09/27/2006 | CN2822028Y AC step controllable parallel reactor device |
| 09/21/2006 | DE102005011554A1 Transformer primary winding`s DC voltage portion compensating method for alternating current-railway vehicle, involves using corresponding back electromotive force for compensating DC voltage supply portion at primary winding |
| 09/20/2006 | CN2819640Y Controllable inductance of AC excited magnetic amplifier |
| 08/23/2006 | CN2810026Y Automatic loaded voltage regulation device for power distribution network |
| 08/23/2006 | CN2810025Y Automatic loaded voltage regulation distribution transformer |
| 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 |
| 07/26/2006 | CN2800640Y 切换式控制装置 Switching control device |
| 07/12/2006 | CN2796242Y Electric control and saving device |