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Matches 251 - 300 out of 2,773

Document Document Title
WO/2011/066860
The invention relates to a method for controlling a voltage intermediate circuit converter (K). In order to be able to operate such a voltage intermediate circuit converter (K) in a particularly secure manner, a voltage-related control d...  
WO/2011/067090
The invention relates to a method for operating an inverter circuit wherein the inverter circuit has n input phase connections (U1, V1, W1) and p output phase connections (U2, V2, W2), wherein n ≥ 2 and p ≥ 2, (n p) comprises two-pol...  
WO/2011/067090
The invention relates to a method for operating an inverter circuit wherein the inverter circuit has n input phase connections (U1, V1, W1) and p output phase connections (U2, V2, W2), wherein n ≥ 2 and p ≥ 2, (n p) comprises two-pol...  
WO/2011/064277
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/2011/064277
A drive device and method for controlling a rotating machine. The drive device includes plural inverters configured to transform first alternate currents (AC); DC links connected to the plural inverters and configured to transmit the DC ...  
WO/2011/062508
A power converter providing required hold up for a primary converter, particularly a cycloconverter, without the required hold up capacity by an auxiliary converter including storage capacitors having the requisite capacity. The auxiliar...  
WO/2011/060280
A power isolation system and method is disclosed. The system includes a transformer suitable for use in the power isolation system, and a semiconductor device electrically connected to the transformer to provide a reduction of the inrush...  
WO/2011/060280
A power isolation system and method is disclosed. The system includes a transformer suitable for use in the power isolation system, and a semiconductor device electrically connected to the transformer to provide a reduction of the inrush...  
WO/2011/058273
The invention relates to a matrix converter circuit having n symmetrical levels per phase including n conversion arms respectively supplied by n intermediate symmetrical voltage levels and connected at the output thereof to a common poin...  
WO/2011/058273
The invention relates to a matrix converter circuit having n symmetrical levels per phase including n conversion arms respectively supplied by n intermediate symmetrical voltage levels and connected at the output thereof to a common poin...  
WO/2011/054194
A static power supply for retractable cables comprises a static power supply housing (11) and a cable reel housing (6). A frequency converter with a frequency and an input voltage of mains supply is disposed in the static power supply ho...  
WO/2011/052364
A power conversion device (1) is configured from an inductor (L) connected in series to an alternating-current power source (20) and a load (30), a full-bridge MERS (100) connected in parallel to the load (30), a control circuit (110), a...  
WO/2011/048719
Disclosed is a power semiconductor module wherein a driver IC (7), which operates in a power supply system that is electrically insulated from a control IC (8), is mounted in the vicinity of a switching element (4) on a first conductor p...  
WO/2011/047784
The invention relates to a device having an energy recovery supply unit and to a fault detection method. The supply unit is connected to the supplying power network via at least one inductor. The invention is characterized in that a netw...  
WO/2011/041425
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/2011/029482
An inverter provides alternating current (iout) to a load (130) containing a welding circuit. The inverter includes at least one commutation circuit (110) and a bridge circuit (120) connected to a bus forwarding power from a DC power sou...  
WO/2011/029480
The invention concerns a method, voltage source converter and computer program product for limiting the current in a DC power transmission system (20). The voltage source converter (12) has an AC side and a DC side and a fault current pa...  
WO/2011/024668
Disclosed is an engine system which can implement the specification change of power-supply voltage from an alternating-current power supply without additionally providing a transformer when the power supply voltage to be subjected to spe...  
WO/2011/022442
Methods and systems for power conversion. An energy storage capacitor is contained within an H-bridge subcircuit which allows the capacitor to be connected to the link inductor of a Universal Power Converter with reversible polarity. Thi...  
WO/2011/022442
Methods and systems for power conversion. An energy storage capacitor is contained within an H-bridge subcircuit which allows the capacitor to be connected to the link inductor of a Universal Power Converter with reversible polarity. Thi...  
WO/2011/022304
A DC to AC inverter unit used in a solar cell power system can include a controller capable of adjusting the inverter's minimal operating voltage to increase the inverter unit power capacity.  
WO/2011/022442
Methods and systems for power conversion. An energy storage capacitor is contained within an H-bridge subcircuit which allows the capacitor to be connected to the link inductor of a Universal Power Converter with reversible polarity. Thi...  
WO/2011/018542
The invention relates to a method for controlling a back-to-back converter in the event of disturbances in the network limiting the capacity of the converter on the side of the network to control the voltage of the DC stage. In this case...  
WO/2011/015227
A voltage source converter (30) for HVDC power transmission comprising at least one phase element (32) consisting solely of series connected diodes (40) to interconnect, a DC network (34) and an AC network (36). The voltage source conver...  
WO/2011/012143
Apparatus and method for generating electric energy in an electric power transmission system comprising an AC cable comprising a core, wherein a portion of the core is partially surrounded by an apparatus comprising a ferromagnetic body ...  
WO/2011/012689
This invention discloses a high-voltage frequency conversion device, which comprises a phase-shifting transformer and 3n power units, wherein every n power units are serially connected to form one phase, three phases are connected in the...  
WO/2011/012689
This invention discloses a high-voltage frequency conversion device, which comprises a phase-shifting transformer and 3n power units, wherein every n power units are serially connected to form one phase, three phases are connected in the...  
WO/2011/009285
A movable shore power variable frequency power supply device includes an onshore power supply electric box (4), an onboard power receiving system (3) and a variable frequency power supply device (1). The input terminals of the variable f...  
WO/2011/008567
The present application discloses methods, circuits and systems for power conversion, using a universal multiport architecture. When a transient appears on the power input (which can be, for example, polyphase AC), the input and output s...  
WO/2011/008567
The present application discloses methods, circuits and systems for power conversion, using a universal multiport architecture. When a transient appears on the power input (which can be, for example, polyphase AC), the input and output s...  
WO/2011/001146
A capacitive impedance decoupling AC power controller comprising, a plurality of zero loss capacitors (12) in parallel each of desired capacitance C farads. The plurality of zero loss capacitors in parallel (12) are commonly connected in...  
WO/2010/145706
An arrangement for exchanging power with a three-phase electric power network comprises a Voltage Source Converter (5) having three phase legs (A-C) with each a series connection of switching cells. The three phase legs are interconnecte...  
WO/2010/142961
A system for distribution of electrical energy to a load is provided. The system comprises a load tap changer to distribute electrical energy to the load, wherein the load tap changer is controllable for operation in either phase angle f...  
WO/2010/144805
A versatile distribution transformer (10) having an electromagnetic transformer (12) and a power electronic module (14) is provided. A pocket (100) having connectors electrically connected to at least one winding structure (22) of the el...  
WO/2010/133721
The present invention relates to a protection circuit for a wind-power generator that includes a filter between the DC bus of the converter and earth, providing an additional path for the earth currents of the system, thereby reducing ex...  
WO/2010/131644
Provided is a control device for hybrid work machinery, whereby the degree of freedom in disposing necessary components is increased and the size of the hybrid work machinery is decreased. A first power conversion unit (14) is connected ...  
WO/2010/124634
A high voltage power conversion device comprises a transformer (33) and a plurality of power units (A1-A5, B1-B5, C1-C5). The transformer includes at least one primary winding which is connected to a three-phase AC input power supply (30...  
WO/2010/124043
A two-wire smart load control device, such as an electronic switch, for controlling the power delivered from a power source to an electrical load comprises a relay for conducting a load current through the load and an in-line power suppl...  
WO/2010/122085
The present invention concerns an apparatus for controlling the operation of a snubber circuit in a system in which an input voltage is processed using at least switches controlled with at least one periodical pattern. The input voltage ...  
WO/2010/118975
The invention relates to a drive system for a facility having an alternating-current isolated network, in particular for a ship or an offshore platform, comprising a three-phase drive machine (8), which can be operated both as a motor an...  
WO/2010/116865
Provided is an indirect matrix converter wherein distortion of the input current or output voltage can easily be reduced. The indirect matrix converter is provided with a first power converter (16) and a second power converter (18), and ...  
WO/2010/115725
The invention relates to a system for controlling an alternating electric charge, comprising a variable speed drive (10) which includes a rectifier module (11) provided with a plurality of power supply terminals (L1, L2, L3) and supplyin...  
WO/2010/106430
A power source for an electric arc welder comprising: inverter means (110) having a primary circuit (220, 230) and a secondary circuit (240), where said primary circuit (220, 230) has four switches (222, 223, 232, 233) and is capable of ...  
WO/2010/099787
An electrodynamic braking device for a universal motor is proposed, wherein during a braking operation a field winding is supplied from a network, and an armature is directly short-circuited, and a braking operation is carried out using ...  
WO/2010/097407
The present invention relates to a light source comprising a piezoelectric transformer and one or more semiconductor-based devices that exhibit electroluminescence electrically connected thereto. The piezoelectric transformer is configur...  
WO/2010/099459
A hybrid distribution transformer is provided that includes an electromagnetic transformer and a voltage source converter that is operable to reduce fluctuation in the output voltage of the hybrid distribution transformer in the event of...  
WO/2010/094547
The invention relates to a method for charging at least one intermediate circuit capacitor (4) arranged in an intermediate circuit (2) mounted between a constant voltage source (1) and a power supply. According to the invention, the inte...  
WO/2010/092113
This invention relates to a power supply system comprising at least two drive units (3) having two power inputs and at least one power generator (G) providing electric power at a chosen system frequency and voltage. The system comprising...  
WO/2010/088979
The invention relates to a method for regulating a self-commutated mains power converter (2) of an intermediate voltage circuit converter (24), wherein in each mains phase (R,S,T) a throttle is connected upstream of said mains power conv...  
WO/2010/091260
A hybrid transformer is provided that includes an electromagnetic transformer and an AC-AC converter with a DC bridge. The AC-AC converter is operable to keep the input voltage and current of the hybrid transformer substantially in phase...  

Matches 251 - 300 out of 2,773