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US20120242297 POWER SUPPLY  
A power supply includes an integrated cable manager board. The integrated cable manager board is configured to integrate elements of the power supply on the integrated cable manager board. The...
US20110204717 SYSTEM AND METHOD FOR PROVIDING COLLABORATING POWER CONTROLLERS  
A method is provided in one example embodiment and includes receiving a message associated with a detection of reactive power in an energy system and inducing a first quantity of reactive power at...
US20110075459 Power Factor Correction Circuits, Systems and Power Supplies Operable With Different Input Voltages  
A cost effective solution for power factor correction in power devices operating at two widely separated input voltages comprises two unequal power rails. One power rail is optimized for operation...
US20130134789 SYSTEM AND METHOD FOR REACTIVE POWER COMPENSATION IN POWER NETWORKS  
A reactive power compensation method includes generating a variable power factor curve for at least one power generator based on information regarding network parameters; obtaining a value of an...
US20110215774 AC POWER CONTROL WITH INTEGRAL POWER FACTOR CORRECTION  
Device and method for high efficiency (low heat loss) control of AC power to reactive load while maintaining a high power factor.
US20150102785 Dynamic High Energy Switch  
A dynamic high-energy switch used for correcting load imbalance through connecting and disconnecting capacitance in a power feed circuit.
US20140210427 Dynamic High Energy Switch  
A dynamic high-energy switch used for correcting load imbalance through connecting and disconnecting capacitance in a power feed circuit.
US20150108952 COMPENSATION OF REACTIVE POWER AT A SUBSEA AC TRANSMISSION CABLE HAVING AN OFF-SHORE INPUT END AND AN ON-SHORE OUTPUT END  
A transmission system and a method for transmitting electrical power which has been produced by at least one off-shore wind turbine to a utility grid being located on-shore is provided. The...
US20140232357 REACTIVE POWER MANAGEMENT  
Methods and systems for controlling a reactive power contribution to reactive power flowing in an electricity distribution network, so as to optimise this reactive power flow are described. A...
US20110316480 SYSTEMS AND METHODS FOR DYNAMIC POWER COMPENSATION, SUCH AS DYNAMIC POWER COMPENSATION USING SYNCHROPHASORS  
An electrical power generation system, such as a solar power inverter, can provide dynamic real-time power compensation, so as to mitigate the effects of voltage sags and swells (e.g., on a...
US20130320762 POWER CONTROL DEVICE  
A power control device for regulating the power that a load consumes on the basis of the AC supply frequency. The system includes decision logic that responds to a frequency deviation to implement...
US20120112711 POWER FACTOR CONTROLLER WITH ERROR FEEDBACK, AND A METHOD OF OPERATING SUCH A POWER FACTOR CONTROLLER  
A power factor controller is disclosed, in which error feedback is provided my means of a parallel combination of at least two error feedback channels. By providing at least two error feedback...
US20120201065 POWER FACTOR CORRECTION CIRCUIT  
A first error amplification circuit amplifies a difference between a predetermined reference voltage and a first detection voltage that corresponds to the output voltage of a DC/DC converter, so...
US20150180272 METHOD AND CIRCUIT FOR CHANGING CAPACITANCE VALUE OF OUTPUT CAPACITOR OF POWER FACTOR CORRECTOR  
A method for changing a capacitance value of an output capacitor of a power factor corrector (PFC) includes applying AC power to a power conversion circuit. It is sensed whether an instantaneous...
US20110095609 SYSTEMS AND METHODS FOR REGULATING POWER IN RENEWABLE ENERGY SOURCES  
Certain embodiments of the invention may include systems and methods for regulating power in renewable energy sources. According to an exemplary embodiment of the invention, a method is provided...
US20100237834 POWER GENERATION PLANT VOLTAGE CONTROL  
A method for controlling a power generation plant may be provided. First, an equivalent grid voltage may be estimated based on electric magnitudes measured at a connection point of the power...
US20110095730 SWITCHED MODE POWER SUPPLY  
A power supply includes a PFC stage 6 and an SMPS stage 8. The power supply can operate in a normal mode in which the PFC stage supplies a voltage to the SMPS stage. In a standby mode, the PFC...
US20110285362 REACTIVE POWER MANAGEMENT  
Embodiments of the invention relate to devices and methods and systems for controlling a reactive power contribution to reactive power flowing in an electricity distribution network, so as to...
US20110221401 Power Factor Compensating Method  
An approach is provided for a power factor compensating method to compensate other electronic devices that use a common power source in order to improve power factor from the perspective of a...
US20140354245 SYSTEM, A METHOD AND A COMPUTER PROGRAM PRODUCT FOR CONTROLLING ELECTRIC POWER SUPPLY  
A method for controlling electric power supply, the method comprising: (a) controllably down converting by a step-down power converter entry voltage from a power source and preventing...
US20120169300 INTEGRATED ELECTRIC METER WITH VAR CAPABILITY  
An integrated electric meter with VAR capability is disclosed. In one aspect, an electric meter determines a plurality of power related parameters for an AC network, and a VAR generation unit...
US20130043846 METHODS AND APPARATUS TO IMPROVE POWER FACTOR AT LIGHT-LOAD  
Methods and apparatus to improve power factor are disclosed. An example method includes detecting power provided to a power factor corrector; detecting power provided by the power factor...
US20110095731 POWER FACTOR CORRECTION CONTROLLER, CONTROLLING METHOD THEREOF, AND ELECTRIC POWER CONVERTER USING THE SAME  
A power factor correction controller is utilized for a power factor correction circuit in a critical conduction mode of an electric power converter. The power factor correction controller...
US20140125297 BRIDGELESS POWER FACTOR CORRECTOR WITH SINGLE CHOKE AND METHOD OF OPERATING THE SAME  
A bridgeless power factor corrector with a single choke is electrically connected to an AC power source. The bridgeless power factor corrector includes a choke element, a first switch, a second...
US20130176003 ELECTRICAL INSTALLATION  
An electrical installation of an arc furnace for melting metals may include a power factor correction unit and a control unit for driving the power factor correction unit, wherein at least one...
US20140328096 ACTIVE POWER FACTOR CORRECTION CIRCUIT FOR A CONSTANT CURRENT POWER CONVERTER  
The present disclosure provides techniques for power factor correction on a constant current system. In an example embodiment, the present disclosure provides a power factor correction circuit...
US20140266081 ADAPTIVE ADJUSTMENT TO OUTPUT RIPPLE IN A DEAD ZONE  
An embodiment relates to a method for adjusting a dead zone, wherein an amplitude of an oscillating signal is determined, and wherein the dead zone is adjusted based on the amplitude of the...
US20130050879 High Efficiency Bridgeless PFC Converter and Method  
An embodiment bridgeless power factor correction circuit comprises a first boost converter and a second boost converter connected in parallel. A first switch is coupled between the input of the...
US20120001599 Power Supply Circuit Capable of Handling Direct Current and Alternating Current and Power Supply Control Method  
According to one embodiment, a power supply circuit includes an input terminal, a rectifier circuit, a power factor improvement circuit, a DC/DC converter, and a control module. The DC/DC...
US20080143304 SYSTEM AND METHOD FOR CONTROLLING MICROGRID  
A system for controlling a microgrid includes microgrid assets and a tieline for coupling the microgrid to a bulk grid; and a tieline controller coupled to the tieline. At least one of the...
US20140103861 Active Power Factor Corrector Circuit  
In accordance with an embodiment, an electronic device includes a controller configured to be coupled to a first switch of a power factor corrector. The controller is configured to produce a...
US20140097807 Methods and Systems for Mitigation of Intermittent Generation Impact on Electrical Power Systems  
Methods and systems for mitigation of intermittent generation impact on electrical power system may be provided. A voltage of the power line may be monitored. A change in the voltage of the power...
US20120086411 Switching Power Supply Circuit with Reduced Total Harmonic Distortion  
A switching power supply circuit has a control circuit for current-mode on-off control of a primary switch connected to an inductor in a voltage boost topology for operation in boundary-conduction...
US20150022163 PFC CIRCUIT  
In one embodiment, a power factor correction (PFC) circuit can include: (i) a rectifier bridge and a PFC converter coupled to an input capacitor; (ii) a harmonic wave compensation circuit...
US20150145485 POWER-FACTOR-CORRECTION (PFC) APPARATUS AND METHOD  
The various embodiments may include a power supply having a first loop in communication with a power stage of the power supply. A second loop in communication with the first loop may generate a...
US20130207621 POWER FACTOR CORRECTION CIRCUIT  
A power factor correction circuit includes a first series circuit, a second series circuit, a smoothing capacitor, and a reactor. The power factor correction circuit further includes an input...
US20120217938 MULTI-PATH POWER FACTOR CORRECTION  
A method of multi-path power factor correction includes providing a plurality of energy transfer paths from a voltage-varying input to an output; delivering a first fraction of available input...
US20150002107 REDUCING CURRENT HARMONICS AT LIGHT LOADS  
Reducing current harmonics at light loads is disclosed. In an example, a method includes increasing output voltage of a boost converter to reach a higher potential in a low power mode. After...
US20130162224 Digitally-Controlled Power Factor Correction Circuits, Methods and Articles of Manufacture  
Digitally-controlled power factor correction circuits, methods, and articles of manufacture are disclosed. A disclosed power supply comprises a power factor correction circuit including a switch,...
US20140375283 CONTROLLING METHOD AND SYSTEM FOR SUPPORTING ACTIVE POWER FACTOR CORRECTION LOADS  
The present invention relates to a control method for supporting active power factor correction (APFC) loads, comprising: providing square wave width of an output voltage waveform to be a...
US20150214833 SYSTEM AND METHOD OF COMPENSATING POWER FACTOR FOR ELECTRICAL LOADS  
A power factor controller (PFC) for an electrical load such as LED lighting includes a power factor correcting converter for generating a sinusoidal input current. The PFC further includes a...
US20140003105 POWER FACTOR CORRECTION CIRCUIT, THE CONTROL CIRCUIT AND THE METHOD THEREOF  
A power factor correction circuit including a rectifier bridge, an energy storage component, a power switch, a second switch and a control circuit provides reduced THD and improved PF performance...
US20130043847 POWER FACTOR CORRECTION CIRCUITRY AND METHODOLOGY TO COMPENSATE FOR LEADING POWER FACTOR  
Aspects relate to utilizing power factor correction to compensate for a leading power factor produced mainly due to electromagnetic interference (EMI) capacitors in front of a power factor...
US20130320939 INDUCTIVE LOAD POWER SWITCHING CIRCUITS  
Power switching circuits including an inductive load and a switching device are described. The switches devices can be either low-side or high-side switches. Some of the switches are transistors...
US20130009613 Inductive Load Power Switching Circuits  
Power switching circuits including an inductive load and a switching device are described. The switches devices can be either low-side or high-side switches. Some of the switches are transistors...
US20150137772 POWER FACTOR CORRECTION SUB-SYSTEM FOR MULTI-PHASE POWER DELIVERY  
Systems and methods are disclosed for providing power factor correction (“PFC”) for multi-phase power delivery. A PFC sub-system can include multiple active PFC modules and multiple isolated...
US20130307494 ON-LOAD TAP-CHANGER CONTROL METHOD, EXCITATION CONTROL SYSTEM CARRYING OUT SAID CONTROL METHOD AND POWER EXCITATION CHAIN  
The present invention relates to an on-load tap changer control method for a power transformer in a power system. The power transformer has a primary side for a connection to a first grid in which...
US20130135910 POWER FACTOR CORRECTION APPARATUS, DC/DC CONVERTER, AND POWER SUPPLYING APPARATUS  
There are provided a power factor correction apparatus, a direct current/direct current (DC/DC) converter, and a power supplying apparatus, capable of preventing unstable feedback control due to a...
US20140176090 VOLTAGE REGULATION SYSTEM AND METHOD  
A method for regulating a power line voltage includes determining a slow voltage variation by filtering an actual voltage at terminals of the voltage regulation apparatus. A fast active power...
US20130328404 VOLTAGE CONVERSION APPARATUS, POWER GENERATION SYSTEM, AND VOLTAGE CONVERSION METHOD  
A voltage conversion apparatus converts a voltage of an electricity generator. The voltage conversion apparatus includes a maximum power tracking portion that is adapted to output a voltage which...
Matches 1 - 50 out of 154 1 2 3 4 >