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| Number | Title | Issue Date |
| 8093871 | Power distribution system control and monitoring In one example embodiment, a power control system includes one or more stages, a plurality of primary busbars operatively coupled to the one or more stages, and an intelligent controller operatively coupled to the one or more stages. Each of the one or more stages i... | 01/10/2012 |
| 8076911 | Flash memory and related voltage regulator A voltage regulator includes a voltage regulator unit configured to output a step voltage and a damping resistance switching unit coupled between a load and an output node of the voltage regulator and configured to select an optimal damping resistance value based on... | 12/13/2011 |
| 8072192 | Auxiliary power supply with a coupling capacitor between a high voltage line and ground A power supply apparatus includes a coupling capacitor arranged to be connected on its first end to ground; a transformer including a primary winding and a secondary winding; a first rectifier bridge connected in parallel with the secondary winding; and an energy st... | 12/06/2011 |
| 7872453 | Customer intelligent reactive power automatic compensation energy-saved device A power supply compensation, particularly relating to a customer intelligent reactive power automatic compensation energy-saved device, which includes an intelligent reactive power compensation regulator, a plurality of branch capacitor control contactors, a plurali... | 01/18/2011 |
| 7688042 | Power factor correction apparatus A power factor correction apparatus is for correcting a power factor of transmission lines. The power factor correction apparatus includes a switch, a compensator, a detecting apparatus, a voltage processing circuit, a voltage comparison unit, and a time-delay unit.... | 03/30/2010 |
| 7323213 | Apparatus and method for discharge surface treatment An apparatus has a green compact electrode including a material of a coating formed on a workpiece by a discharge, a power source for supplying a first voltage, a voltage detector for detecting a voltage between the workpiece and the electrode, and a pulse current g... | 01/29/2008 |
| 7299664 | Device for controlling motor in washing machine and method for controlling process of washing machine by using the same Device for controlling a motor in a washing machine and a method for controlling a process of a washing machine by using the same, the device including a motor, a power source part for supplying a voltage to the motor, a plurality of torque varying parts parallel to... | 11/27/2007 |
| 7271572 | Apparatus and methods for providing a voltage adjustment for single-phase voltage regulator operation in a three-phase power system Provided is an apparatus and method for providing a voltage reduction for single-phase voltage regulator operation in a three-phase power system. The voltage regulator includes a plurality of tap positions selectable to adjust a voltage at a load to an in-band area.... | 09/18/2007 |
| 7265679 | Apparatus and method for indicating onset of high-voltage at an output locus of a signal converter device An apparatus for indicating detection of an onset of a high-voltage condition at an output locus of a signal converter device, the signal converter device including a switching network for switchingly controlling a potential at a circuit node coupled with the output... | 09/04/2007 |
| 7259947 | Phase control switching device Respective contact terminals in respective arc-suppressing spaces of respective breakers are opened at a voltage zero point of any phase of three phases, simultaneously among the three phases. If current breaking is carried out for the three phases at the same time,... | 08/21/2007 |
| 7245045 | T-filter for reducing disturbances generated on a power grid by an active filter An active filter (4) for compensation of variations in an apparatus' (3) current consumption from a power grid (1) as a cause of variations in the apparatus electrical load, through active frequency filtering and dynamic compensation of reactive... | 07/17/2007 |
| 7218122 | Power disturbance generator An apparatus selectively generates a disturbance in a three-phase supply voltage provided to a load. The apparatus includes input connections for receiving a first phase voltage, a second phase voltage and a third phase voltage of the three-phase supply voltage. The... | 05/15/2007 |
| 7212562 | System and method for controlling total electrical power across multiple furnaces using electrode positioning A method and system for stabilizing energy consumption in multiple loads, or in single multi-phase loads. A central controller monitors variable reactances in the loads and identifies situations of power and/or current fluctuation and/or unbalance. The central contr... | 05/01/2007 |
| 7212561 | System and method for controlling electrical power across multiple furnaces using variable reactors A method and system for stabilizing energy consumption in multiple loads, or in single multi-phase loads. The method and system also compensates for unbalance in multi-phase loads. A central controller monitors variable reactances in the loads and identifies situati... | 05/01/2007 |
| 7200503 | Field device electronics fed by an external electrical energy supply An electric current controller for field-device electronics controls and/or modulates the supply current. The supply current is driven by a supply voltage provided by an external energy supply. The field-device electronics has an internal operating and evaluating ci... | 04/03/2007 |
| 7127288 | Method and apparatus for low power, regulated output in battery powered electrotherapy devices A device for controlling the discharge of a battery supplying an intermittent load, such as a nerve stimulation device. The device includes a controller which operates a switched inductor to feed a capacitor with numerous small pulses from the battery, thereby build... | 10/24/2006 |
| 7116076 | Filter network for motor control systems Filter network for the reduction of the voltage switching speed between an electrical motor drive and an electrical motor and/or between an electrical distribution network and a motor drive, comprising for each electrical phase a self-damped inductor having a comple... | 10/03/2006 |
| 7095139 | Transformer inrush current elimination system A closing phase that produces the smallest energization flux error at a connection input point is calculated based upon a residual flux of the first closing phase and the preliminarily given pre-arc characteristic and closing time deviation characteristic of a three... | 08/22/2006 |
| 7091703 | Dynamic reactive compensation system and method The invention features a system for connection to a utility power network. The system includes a reactive power compensation device coupled to the network and configured to transfer reactive power between the utility power network and the reactive power compensation... | 08/15/2006 |
| 7067011 | Apparatus and method for discharge surface treatment An apparatus has a green compact electrode including a material of a coating formed on a workpiece by a discharge, a power source for supplying a first voltage, a voltage detector for detecting a voltage between the workpiece and the electrode, and a pulse current g... | 06/27/2006 |
| 7024254 | Method for controlling a discrete system A system and method for controlling a controlled parameter that affects a target parameter of a target zone is disclosed. The method comprises providing a feedback control loop having a switching controller, a controlled device, and an averaging device. The controll... | 04/04/2006 |
| 7009403 | Circuit arrangement for controlling and detecting the load current through a load Circuit arrangement for controlling the current flow through a load in the case of detection of the current flow according to the current sense principle. The circuit arrangement has a load transistor and a plurality of auxiliary transistors of identical type, which... | 03/07/2006 |
| 6925362 | Method of providing service which makes power distribution operation effective, and system A method and system for calculating profits shared between a power distribution company and a service provider, wherein the power distribution company purchases and resells electric power. The service provider provides consultation service to the power distribution ... | 08/02/2005 |
| 6924627 | Method of reactive power regulation and aparatus for producing electrical energy in an electrical network A method of reactive power regulation in an electrical network in which electrical power is produced by an electrical generator preferably driven by the rotor of a wind power installation and suitably modulated by means of a compensation device between the generator... | 08/02/2005 |
| 6841976 | Multi-line power flow transformer for compensating power flow among transmission lines A multi-line power flow transformer implements power flow control among multiple transmission lines in an n-phase power system. The transformer has an exciter unit with n primary windings. Each primary winding is on a core and receives a transmission voltage of a re... | 01/11/2005 |
| 6788558 | Passive common mode filter and method for operating a passive common mode filter An electromagnetic interference filter for filtering common mode current in an inverter device, the filter comprising: an inductor coupled in a least one power supply line to the inverter device; the inverter device having a ground return line, a capacitor coupled b... | 09/07/2004 |
| 6783795 | Power supply apparatus for discharge surface treatment In a power supply apparatus for discharge surface treatment which uses a green compact electrode as a discharge electrode, allows a pulse-type discharge to take place between said discharge electrode and a workpiece, and forms a film, which is made of an electrode m... | 08/31/2004 |
| 6747373 | System and method for coordinated control of a switched power capacitor with an integrated resonance protection system System and methods for coordinating the control system of a switched power capacitor with an integrated resonance protection function. The coordination system coordinates the function of a switched power capacitor's primary control system and resonance protection sy... | 06/08/2004 |
| 6702896 | Apparatus and method for discharge surface treatment In a power supply apparatus for discharge surface treatment which uses a green compact electrode as a discharge electrode, allows a pulse-type discharge to take place between said discharge electrode and a workpiece, and forms a film, which is made of an ... | 03/09/2004 |
| 6573691 | Control system and method for voltage stabilization in electric power system Variable shunt and series connected reactors are used in a complimentary combination in an electric arc furnace to provide improved flicker control. A power control system for an time-varying AC load, such as an electric arc furnace, connected to an AC po... | 06/03/2003 |
| 6559622 | System for preventing overreach of protection for series compensated power lines The system includes an enable signal applied to an output AND element. A comparator compares the voltage ratio of selected measured and calculated phase-to-phase or single phase voltages against a threshold value. An AND gate is responsive to a high signa... | 05/06/2003 |
| 6509785 | Voltage regulator circuit for attenuating inductance-induced on chip supply variations An active digital voltage regulator circuit is a two terminal device that is connected in shunt to first and second power supply input lines. The active digital voltage regulator circuit stores energy during times when the local power supply voltage is gr... | 01/21/2003 |
| 6420856 | Versatile power flow transformers for compensating power flow in a transmission line A series-compensating power flow transformer implements power flow control in a transmission line of an n-phase power transmission system, where each phase of the power transmission system has a transmission voltage. The transformer has n primary windings... | 07/16/2002 |
| 6396248 | Versatile power flow transformers for compensating power flow in a transmission line A power flow transformer implements power flow control in a transmission line of an n-phase power transmission system, where each phase of the power transmission system has a transmission voltage. The transformer has n secondary windings, where each secon... | 05/28/2002 |
| 6392390 | Synchronous switching apparatus for use with a multiple phase power system A synchronous switching apparatus for detecting a source voltage of each phase to close each phase at an electrical phase angle predetermined for each phase, including switching devices 1a-1c provided one for each phase for opening and closing an impedanc... | 05/21/2002 |
| 6326773 | Power conversion apparatus A voltage amplitude adjuster including semiconductor switches for power conversion, an AC chopper for converting an input AC voltage to an AC voltage of the same phase and different amplitude relative to the input AC voltage, and a smoothing AC filter for... | 12/04/2001 |
| 6288918 | Switched power converter with hold-up time and harmonics reduction Switched power converter with hold-up time and harmonics reduction connected to an AC power mains through a first rectifier means (13) and connected to conversion means (19) supplying a regulated voltage. An energy storage means (16) connected in parallel with... | 09/11/2001 |
| 6285169 | Sag generator with switch-mode impedance A voltage sag generator for alternating current power systems intentionally creates power quality disturbances. The sag generator has a switch-mode impedance between its input and its output. Varying the duty-cycle of the switch-mode impedance causes volt... | 09/04/2001 |
| 6260975 | Power control apparatus having a control voltage filtering means with multiple time constants A power control apparatus is described that includes a power level adjusting circuit (11) for adjusting an input signal to a desired power level in accordance with a control voltage to output a obtained result; a control voltage generating circuit (12 to ... | 07/17/2001 |
| 6246595 | Series control of electric ARC furnaces A circuit and method for regulating power supplied on a network which provides power to an electric arc furnace or other highly variable load. The circuit includes at least a first inverter connected in series with the arc furnace transformer, and in shun... | 06/12/2001 |
