H02P 13 - Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output

Patents for H02P 13 - Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output (981)
08/2001
08/16/2001	DE10028295C1 Stufenschalter Tap changer
08/01/2001	CA2297544A1 Current transformer demagnetizing circuit
05/2001
05/02/2001	CN1065375C Harmonic current attenuation device for electric motor
03/2001
03/28/2001	CN1063884C Three phase motor control
03/14/2001	CN2423642Y Adjusting reactor
02/2001
02/01/2001	DE19933811A1 Three-phase transformer for power distribution at medium-and high-voltages, with voltage control, uses controlled converter for regulating the secondary voltage via an input-side
12/2000
12/27/2000	CN1059991C Resonance tapped transformer
09/2000
09/28/2000	DE19912603A1 Electrical power supply for ozone gas generator with programmable logic control unit for fine voltage regulation
09/26/2000	US6124726 Method of monitoring a tap selector
08/2000
08/31/2000	WO2000050910A1 Method of controlling step switches
08/17/2000	WO2000048303A1 Alternator system with transformers and ac-dc converters
08/10/2000	DE19930881A1 Transformer arrangement e.g. for railway vehicle drive
07/2000
07/20/2000	DE19925326A1 Circuit for a.c. current converter has two-pole stage in series with load that maintains large voltage for small secondary side current and small voltage for large secondary side current
07/12/2000	CN1054483C Branch trouble signal detector for high power rectification equipment
06/2000
06/28/2000	CN1054009C Method and device for automatically changing upper, balanced and lower voltage in electric power saving transformer
05/2000
05/18/2000	DE19907834C1 Monitoring method for step switches involves selecting characteristic motor torque values for identical times in two switching processes, and comparing corresponding switch torques with limits
05/17/2000	CN2378813Y Controller of cooler for transformer
05/04/2000	DE19848428A1 Staged voltage maintainer for AC voltages has several transformers with staged secondary voltages that can all be switched onto or disconnected from mains voltage mutually independently
04/2000
04/27/2000	DE19848869A1 Rest current reduction device for electrical device e.g. electric doorbell, uses switching relay or electronic power switch for disconnection of transformer in rest condition of electrical device
04/12/2000	EP0992870A2 Power control device
03/2000
03/08/2000	CN1246749A Circuit for reducing input harmonics of electric power network
03/02/2000	DE19837659A1 Device to adjust power output from load during its operation has transformer with two primary-side mains tappings plus further tappings between them, switching device and control device for this
12/1999
12/30/1999	DE19818132A1 DC transformer for motor vehicle window heater
12/08/1999	CN1237823A Magnetic differential induction voltage regulator and its constituent voltage-regulating power supply and power factor compensator
09/1999
09/29/1999	CN2341321Y Automatic voltage regulator with low voltage load
09/14/1999	US5953225 Power flow control and power recovery with rotary transformers
09/14/1999	US5952816 Compensation for power transfer systems using variable rotary transformer
08/1999
08/11/1999	CN1225525A Non-contact electronic on-load voltage regulator for electric power transformer
07/1999
07/06/1999	US5920467 Power converter for converting AC shore power to shipboard use
06/1999
06/29/1999	US5917302 Harmonic current attenuating device of a motor
06/02/1999	DE19751802A1 Regulation arrangement for operation of earthing coil
05/1999
05/25/1999	US5907236 Resonance tapped transformer
05/19/1999	EP0917271A2 Compensation for power transfer systems using rotary transformer
05/19/1999	EP0917270A2 Power flow control and power recovery with rotary transformers
05/19/1999	EP0917169A2 Method for monitoring a tap changer
04/1999
04/28/1999	CN1215215A Method of monitoring functional capability of tap selector
04/01/1999	DE19728318C1 Dynamic suppression of DC current in single-phase transformer
03/1999
03/24/1999	CN1211852A Branch trouble signal detector for high-power rectification equipment
03/11/1999	DE19744465C1 Means for regulation of a multi-contact switch for tapped transformer
03/11/1999	DE19728220C1 Voltage regulation method
03/03/1999	CN1209687A Harmonic current attenuation device for electric motor
02/1999
02/10/1999	CN1207609A Loaded capacity-regulated transformer
01/1999
01/13/1999	EP0891040A1 Electric drive, especially for a garage door, with a direct-current motor
11/1998
11/10/1998	CA2164819C Soft switching circuitry
11/05/1998	DE19718127A1 Circuit arrangement to adjust alternating voltage applied to lamp
10/1998
10/20/1998	US5825164 Inductance controller with load regulator
10/14/1998	EP0835548A4 Resonance tapped transformer
10/07/1998	CN1040155C Method for determination of parameter of digital voltage regular and controlling sub-connecting switch of transformer
09/1998
09/08/1998	US5804953 Power converter for converting AC shore power to shipboard use
07/1998
07/29/1998	CN1189257A Resonance tapped transformer
04/1998
04/15/1998	EP0835548A1 Resonance tapped transformer
03/1998
03/25/1998	EP0831582A2 Device for interfacing a consumer to the supply network voltage
03/04/1998	CN1175121A Method fo automatically changing upper, balanced and lower voltage in electric power saving transformer and device of the same
02/1998
02/25/1998	CN2275302Y Secondary lateral series capacitor compensator for suction flow transformer
12/1997
12/30/1997	CA2110724C Vernier control system for subsynchronous resonance mitigation
09/1997
09/24/1997	EP0594833B1 Vernier control system for subsynchronous resonance mitigation
09/23/1997	US5670834 Electric power converter with load compensation
08/1997
08/05/1997	US5654627 Method of automatically changing upper, balanced and lower voltage in electric power saving transformer and the device of the same
05/1997
05/21/1997	EP0774830A1 Apparatus for controlling a compressor in a cooling system
04/1997
04/24/1997	DE19537600A1 Electronic power saving circuit e.g. for doorbell AC voltage transformers
04/10/1997	DE19537354A1 Digitally controlled power circuit current strength determn.
04/02/1997	EP0375687B2 Thyristor on-load change-over switch
03/1997
03/12/1997	CN1144925A Load tip-off exchanger type ac. constant voltage device
02/1997
02/27/1997	DE19632759A1 Power control for single-phase fan motor or heating resistance
01/1997
01/30/1997	WO1997003451A1 Power saving apparatus using mutual inductive reactor
01/16/1997	WO1997001883A1 Resonance tapped transformer
12/1996
12/04/1996	EP0704144A4 Soft switching circuitry
10/1996
10/23/1996	CN1134063A Three phase motor control
06/1996
06/19/1996	EP0717333A1 Supply voltage selection circuit for a voltage controller
04/1996
04/03/1996	EP0704144A1 Soft switching circuitry
03/1996
03/29/1996	CA2158005A1 Controlled transformer
12/1995
12/27/1995	CN2216307Y Multifunctional control cabinet for load shunt switch
11/1995
11/15/1995	CN2212858Y Voltage reducing device capable of automatically thifting
10/1995
10/25/1995	CN2211140Y Contact-less automatic voltage regulater for distribution transformer
08/1995
08/16/1995	CN1106940A Method for determination of parameter of voltage regular and controlling sub-connecting switch of transformer
08/10/1995	DE4403956A1 Variable output transformer group with tap-changing facility
04/1995
04/26/1995	EP0650113A2 Method of paramatrisation of a digital voltage regulator, especially for controlling a transformer with a step switch
03/1995
03/02/1995	DE4431012A1 Elektrischer Energieflußregler für Solargenerator Electrical Energieflußregler for solar generator
02/1995
02/01/1995	EP0637122A1 An apparatus and method of controlling a step-down ratio of an autotransformer in response to an input voltage
01/1995
01/12/1995	DE4337956C1 Power controller
01/05/1995	WO1995001084A1 Soft switching circuitry
12/1994
12/28/1994	EP0569557A4 Phase-shifting transformer system.
11/1994
11/24/1994	DE4336438C1 Method for parameterising a digital voltage regulator, in particular for controlling a transformer having a stepping switch
11/17/1994	EP0594833A4 Vernier control system for subsynchronous resonance mitigation.
11/02/1994	CN1026452C Inductive current switching system and method
10/1994
10/27/1994	DE4312764A1 Detection device for identifying the remanence level in the core of a transformer
10/13/1994	DE4410902A1 Power supply unit
07/1994
07/05/1994	US5327355 Voltage or reactive power control method and control device therefor
05/1994
05/04/1994	EP0594833A1 Vernier control system for subsynchronous resonance mitigation.
03/1994
03/17/1994	DE4230727A1 Linear inverter for power supply to sensitive measuring appts. - employs multiplying D=A converter for sync. adaptation of control voltage to maintain output within tolerances
02/1994
02/22/1994	US5289110 Input current responsive, tap changing transformer system
02/01/1994	US5283728 In a voltage control system for an alternating current power supply
11/1993
11/25/1993	WO1993023910A1 Vernier control system for subsynchronous resonance mitigation
11/18/1993	EP0569557A1 Phase-shifting transformer system
11/04/1993	DE4213834A1 Electroplating or electrolysis DC supply - has separately locatable voltage regulating unit and bath current unit
09/1993
09/08/1993	EP0558532A1 Voltage regulator
09/02/1993	WO1993017480A1 Voltage regulation arrangement for parallel transformer operation
08/1993
08/12/1993	DE4203394A1 Battery charger with primary controlled for constant currents - has number of switched primary windings with binary weightings selected dependent upon secondary circuit current
07/1993
07/13/1993	US5227713 Vernier control system for subsynchronous resonance mitigation
05/1993
05/12/1993	EP0375687B1 Thyristor on-load change-over switch

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