Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 601 - 650 out of 7,538

Document Document Title
WO/2013/090852A2
In at least one embodiment, an electronic system adapts current control timing for half line cycle of a phase-cut input voltage and responsively controls a dimmer current in a power converter system. The adaptive current control time and...  
WO/2013/090112A2
A system and method for detecting input phase loss in an adjustable speed drive (ASD) includes an input unit to detect operating data from the ASD. The operating data includes a DC link current of the ASD. The system also includes a stat...  
WO/2013/083761A2
The invention relates to an asynchronous motor unit comprising a frequency converter for regulating the asynchronous motor (7). The frequency converter comprises an input‑side, uncontrolled bridge rectifier (2), a DC voltage intermedia...  
WO/2013/082860A1
An onshore power system for a wharf ship, comprising a high voltage variable frequency power supply device (1), a high voltage junction box (2), a high voltage cable reel (3) and a shipborne transformer substation (4); the high voltage v...  
WO/2013/080744A1
A matrix converter according to an embodiment is equipped with: a power conversion unit which has multiple bi-directional switches; a control unit for controlling the power conversion unit; and a current detection unit for detecting a cu...  
WO/2013/079739A1
The invention relates to a system and method for reducing losses in parallel transformer systems in distribution centres. The method comprises: measuring the total load capacity SL of the parallel transformers (10, 10') of the distributi...  
WO/2013/079170A1
A method is specified for exchanging power between a multi-phase AC voltage system (10) and an electrical subscriber (4, 6, 8) via a unipolar voltage intermediate circuit (16), wherein a multi-phase inverter (18) connected to the AC volt...  
WO/2013/079962A2
A voltage optimisation apparatus for controlling output voltage of an alternating current electricity supply is disclosed. The apparatus includes input and output terminals and a transformer reducing or increasing the voltage to an optim...  
WO/2013/078763A1
A high voltage frequency conversion power supply device comprises a high voltage incoming cabinet and a transformer. A high voltage cable enters the high voltage incoming cabinet, and leaves same and enters the transformer. The high volt...  
WO/2013/013850A3
The invention relates to a switch mode power supply (9), to a method for operating said power supply (9) and to the use of the thereof. Said switch mode power supply (9) comprises a control for controlling a control element and which is ...  
WO/2013/081995A2
A power supply with a multi-bridge topology configured to provide multiple different bridge topologies during operation. The power supply includes a plurality of half-bridge circuits connected to a controller. The controller can selectiv...  
WO/2012/175294A3
Rectifier stage for a subsea power grid It is described a rectifier stage (451) for converting an input AC voltage to an output voltage, the rectifier stage comprising: a first AC input terminal (455); a second AC input terminal (457), w...  
WO/2013/076937A1
This AC conversion circuit converts a single-phase AC input voltage with a given frequency (f0) to a three-phase AC output voltage with a lower frequency (f1). This AC conversion circuit is provided with the following: a switching unit (...  
WO/2012/104232A3
The invention relates to a stepping switch for voltage control, comprising semiconductor switch elements on a variable transformer having associated regulating windings. The stepping switch has a modular design, wherein each module compr...  
WO/2013/074358A1
A power converter includes an active front end (AFE) that is coupled by a dc link stage to a plurality of H-bridge inverters. One or more multi-phase electromagnetic energy conversion devices, such as transformers or electric machines, w...  
WO/2013/072908A1
Method of conversion of high DC voltage to pulsating AC voltage and a converter using the method, wherein AC voltage is generated by a high frequency fixed generator, the voltage is transmitted by capacitive coupling (11, 12, 13, 14) to ...  
WO/2013/074109A2
A monolithic DC to DC converter, provides a semiconductor substrate, a surface FET formed on the semiconductor substrate that modulates currents across a surface of the semiconductor substrate, and a toroidal inductor with a magnetic cor...  
WO/2013/067967A1
A semiconductor electricity converter is provided. The semiconductor electricity converter comprises: an AC input module, for converting an input AC electric energy into a light energy, the AC input module comprising a plurality of semic...  
WO/2013/067800A1
A megawatt direct drive type squirrel-cage asynchronous generator AC-DC-AC wind generation system with a medium-voltage squirrel-cage asynchronous generator as a wind generator comprises a squirrel-cage asynchronous generator, a megawatt...  
WO/2013/001496A3
A wind turbine for generating and feeding electric energy to an electric power grid, the wind turbine (1) having a blade assembly (5); an electric machine (6) having a stator (10), and a rotor (11) connected to the blade assembly (5) to ...  
WO/2013/070094A2
A method for controlling a converter including a resonant circuit, where the converter is controlled such that control switches are switched into a first state at the occurrence of an event that is related to a dependent variable of the ...  
WO/2013/064229A2
The invention relates to a device and a method for applying a voltage to a plurality of silicon rods in a CVD reactor. In each case, a series circuit, in which the silicon rods can be used as resistors, at least one first, at least one s...  
WO/2013/058808A2
In a transformer core and transformer, a wound transformer core is formed from magnetic steel strips that are wound into multiple rings of different widths and arranged to define a ring-like structure having a stepped, substantially circ...  
WO/2013/056918A1
The invention relates to a power converter intended to control an electrical load (C) comprising a supply DC bus, a bus capacitor, a pre-charging circuit of the bus capacitor provided with a limiting resistor, a switched-mode power suppl...  
WO/2012/160017A3
The invention relates to a voltage setting device, comprising at least one multi-step voltage output (34), at least one power converter unit (30), which has at least one first power element (46) that forms at least a part of a power conv...  
WO/2013/051392A1
This charging device (1A), to which a power conversion apparatus (11, 81, 3, 4, 5, 7, 9) that converts commercial power to DC power has been mounted, is provided with: a core frame (14) that mounts a power conversion apparatus that inclu...  
WO/2013/051475A1
This power converter (3) directly converts polyphase AC power into AC power, and is provided with: a conversion circuit which has multiple first switching means (311, 313, 315) which are connected to the R, S and T phases of the polyphas...  
WO/2013/051476A1
This power converter (3) directly converts polyphase AC power into AC power, and is provided with: a conversion circuit which has multiple first switching means (311, 313, 315) which are connected to the R, S and T phases of the polyphas...  
WO/2013/047236A1
The purpose of the invention is to, when outputting an AC voltage to an inductive load, reduce an effective power pulsation caused by odd-order harmonic components of the current flowing through the load. The modulation factor (k) of an ...  
WO/2011/064277A3
A drive device and method for controlling a rotating machine. The drive device includes plural inverters (60) configured to transform first alternate currents, AC; DC links (62a, 62b)connected to the plural inverters (60) and configured ...  
WO/2013/014334A3
The invention relates to an elevator system and also to an electricity supply device (1, 2, 3) for supplying electric power in the elevator system. The electricity supply device (1, 2, 3) comprises a controllable power output stage (4, 5...  
WO/2013/042266A1
This electric apparatus is provided with a switching power supply, a rectifying circuit, a pair of capacitive elements, and a load. The switching power supply has inputted thereto a direct current power supply voltage or an alternating c...  
WO/2013/041737A1
The invention relates to an electric power converter method and system with at least two converter units (14), which includes a control means (12) that establishes the maximum output current of the operational converter modules, as well ...  
WO/2013/039404A1
The invention provides a device for operative connection between a subsea step out cable far end and subsea loads such as pumps, compressors and control systems, distinctive in that the device is a rotating frequency stepper device, more...  
WO/2013/037400A1
A dual mode voltage source converter (30) comprises first and second terminals (32,34) for connection in use to a first network (44a); at least one converter limb (36) extending between the first and second terminals (32,34) and having f...  
WO/2013/039415A1
The invention relates to the field of electrical engineering and is intended in particular for increasing reactive power and converting reactive power into active power. The technical result addressed by the invention consists in increas...  
WO/2013/035782A1
A power conversion device comprises a conversion circuit having bidirectionally switchable multiple-pair switching elements connected to each phase and converting an input AC power to an AC power. A first switching time is calculated tha...  
WO/2013/035783A1
A power conversion device comprises a conversion circuit having multiple-pair switching elements connected to each phase and converting an input AC power to an AC power. A first switching time is calculated that is the time required for:...  
WO/2013/035781A1
A power conversion device comprises a conversion circuit having bidirectionally switchable multiple-pair switching elements connected to each phase and converting an input AC power to an AC power. A first switching time is calculated tha...  
WO/2013/033089A1
A power converter circuit is coupled to an AC power input, a backup power input, a first capacitive element and a second capacitive element. The power converter circuit is configured to, in a line mode of operation and during a positive ...  
WO/2011/041425A3
An apparatus including an alternator that is drivable an engine for producing a first AC electric current, a rectifier in electrical communication with the alternator lot producing a DC electric current an inventor in electrical communic...  
WO/2013/026179A1
Systems and methods for suppressing resonances in power converters are provided. A power converter (100) includes an input stage (101) configured to receive alternating current (AC), an output stage (102) configured to output alternating...  
WO/2012/028839A3
A transformer based voltage optimization apparatus (201) configured for use as a component of an electrical circuit that comprises a load (202) comprises a first transformer arrangement (203) specifically configured with means to transfo...  
WO/2013/026220A1
An inverter system control method and device, and an inverter system. The control method includes: detecting parameters of a transformer primary side (101), calculating an equivalent impedance voltage drop of the transformer according to...  
WO/2013/024034A2
A control system for controlling an operation of a hydroelectric turbine. The control system comprises a converter system to convert AC power, supplied by a generator connected to the turbine, and having a voltage and frequency that is a...  
WO/2013/023981A1
The invention relates to a method for operating a converter circuit (4) for converting multi-phase input-side phase voltages (Uu, Uv, Uw) and multi-phase input-side phase currents (Iu, Iv, Iw) into multi-phase output-side phase voltages ...  
WO/2013/020998A2
It is described an arrangement for providing an AC current to a load for direct electrical heating, the arrangement comprising a AC-DC-AC converter cell (133, 433, 533, 633, 733), the converter cell having at least two converter input te...  
WO/2013/020544A1
The invention relates to a method for operating an electric motor in a generator mode, said electric motor being connected to at least three phases of a power supply network. An energy that is to be fed back into the power supply network...  
WO/2013/013850A2
The invention relates to a switch mode power supply (9) which comprises a control for controlling a switch element and is connected to a DC link of a converter. Said switch mode power supply (9) comprises a startup-delay so that the cont...  
WO/2013/012418A1
A method and apparatus for power conversion. In one embodiment, an apparatus comprises a first means for converting a first current to a second current, wherein the first current or the second current is AC current having at least two ph...  

Matches 601 - 650 out of 7,538