Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 701 - 750 out of 7,471

Document Document Title
WO/2012/031787A1
The invention relates to a traction converter having a mains-side feed apparatus (2), a load-side self-commutated pulse converter (4) and an auxiliary operation converter (6), wherein this feed apparatus (2) has a multiplicity of primary...  
WO/2012/031435A1
A stabilization circuit for electronic transformer driven LED devices. The circuit is provided at an output of an electronic transformer driving circuit, which has a rectifier fed into a feedback-controlled oscillator circuit. An isolati...  
WO/2012/028839A2
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/2011/062508A3
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/2012/024959A1
A control method during zero-crossing operation of bridge arms in an uninterruptible power supply (UPS). The UPS comprises a rectifying bridge arm consisting of a first switching tube (Q1) and a second switching tube (Q2), a midline brid...  
WO/2012/025256A1
The invention relates to a drive system for a battery-operated vehicle. According to the invention, said drive system has a voltage intermediate circuit inverter (2) having two self-commutating converters (16, 18) which, on the DC side, ...  
WO/2012/005607A3
An inductive power transfer (IPT system) includes an AC-AC full-bridge converter (Tp1 - Tp4) provided between the primary conductive path (Lpt) and an alternating current power supply (Vin). The system may include a controller for contro...  
WO/2009/066840A3
The present invention relates to a motor controller (300) including an inverter (320) which receives DC power, converts the DC power into AC power of a specific frequency through switching operations, and supplies the AC power to a three...  
WO/2012/022823A1
The invention relates to an electricity supply apparatus, an elevator system and a method for limiting the electricity consumption of an elevator system. The electricity supply apparatus (1) according to the invention is fitted to supply...  
WO/2012/020664A1
An indirect matrix converter couples a converter (2) to an inverter (6) via a positive bus line (4p) and a negative bus line (4n). The anode of clamp diode (28u) is connected to the positive bus line (4p), the cathode of clamp diode (28u...  
WO/2012/016119A1
A load control device adapted to be coupled between an AC power source and an electrical load for controlling the power delivered to the load includes a power supply having an energy storage capacitor (C out) and a charge pump circuit (2...  
WO/2012/013329A2
The invention relates to a current converter of the forward converter type for converting a three-phase primary voltage (U1, U2, U3) into a plurality of secondary voltages (ud1... udn), having a magnetic intermediate circuit that compris...  
WO/2012/010068A1
The present invention relates to a topology of power-generation and grid-integration of a transformerless hydraulic generator. The topology comprises a hydraulic generator set, a high-voltage rectifying topology formed by multiple high-v...  
WO/2012/010065A1
A topology for a single-quadrant transformerless high-voltage frequency converter. The topology comprises an inductance-capacitance (LC) filter circuit, a high-voltage charging loop, a rectifier circuit, and an inverter circuit. High-vol...  
WO/2012/010063A1
An H-bridge based transformerless wind power grid-connected topological structure comprising a wind-powered electric generator, a rectifier module, and an inverter module. The generator generates a low-voltage alternating current (AC) to...  
WO/2012/010329A1
A method and a device for igniting silicon rods outside a CVD-reactor for preparing silicon rods for subsequent processing in a CVD-reactor are described. In the method, a silicon rod is disposed inside an ignition device, and a first vo...  
WO/2012/010067A1
A topological structure for a transformerless high voltage frequency converter, comprising a high voltage charging circuit, an inductor (L1, L2), a rectifier circuit and an inverter circuit. A high voltage power network is directly conne...  
WO/2012/010064A1
An modular multilevel converter (MMC)-based transformerless four-quadrant high-voltage variable-frequency power supply topology. In the power supply topology, the rectification module and conversion module both have modular multilevel to...  
WO/2012/007598A1
The invention relates to a single-phase to three-phase AC voltage converter which provides, from one or two AC input voltage phases plus a neutral, a three-phase output voltage plus the neutral. The converter according to the invention i...  
WO/2012/004146A1
The invention relates to a rectifier system (1) for a vehicle, in particular a railway vehicle that can be operated in a plurality of power supply systems, comprising: at least two DC voltage conductors (5, 6, 7) for providing DC voltage...  
WO/2011/154792A2
An apparatus for providing a power output proportional to a source signal, including a phase modulator driving an upper and an lower power driver with carrier waveforms having a relative phase difference and having a signal modulated the...  
WO/2011/151934A1
The invention is related to an auto voltage regulator for charge, and more specifically relates to an auto voltage regulator for charge which has been designed to be useful for charging of DC voltage on the basis of the principles of an ...  
WO/2011/060280A4
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/2011/120679A3
The invention relates to a transformerless cycloconverter for connecting a first three-conductor grid (50), in particular a three-phase grid, to a second three-conductor grid (51), in particular a three-phase grid, by means of bridge mod...  
WO/2011/147128A1
A converting device of electrical energy includes several single-phase bridge rectification circuits and several three-phase full-controlled bridge circuits. The first input terminals of the bridge rectification circuits are connected to...  
WO/2011/143910A1
An energy saving circuit is used to reduce the input power loss when a power source is in standby or has no load in the field of power source. The energy saving circuit employs a phase shift element (9). The phase shift element (9) is co...  
WO/2011/141905A1
A method for construction of voltage or current power sources receiving an AC input, the power sources based on inclusion of a buffer stage feeding a converter operating with an output driver to a load. The buffer stage includes a buffer...  
WO/2011/140597A1
The present invention provides methods and apparatus for converting a single phase power supply source into a three phase power supply source. The single phase power supply source is utilised as a first output of the three phase power su...  
WO/2011/138110A1
The invention relates to a circuit for controlling a linear compressor, comprising a first input connection (130) and a second input connection (131) for providing the linear compressor with an electric supply voltage (Uv), an output con...  
WO/2011/139269A1
A converter module for a variable speed drive having a semiconductor device for precharge is described. The precharge circuit includes switching modules, one switching module with a first semiconductor switch connected in parallel or ser...  
WO/2011/058273A3
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/2011/139227A1
An electronic voltage stability device for airflow cabinets (100) such as biological safety cabinet or laminar flow cabinet or ductless fume hoods for delivering adjustable and stable airflow (130). The electronic voltage controlling dev...  
WO/2011/134057A1
Provided are methods, circuits, and systems for obtaining power from a power generator such as a photovoltaic cell or a fuel cell. The methods, circuits, and systems comprise converting substantially DC output power from the power genera...  
WO/2011/135691A1
A hybrid construction machine is made compact, and an electric swing motor thereof is driven immediately after an engine is started. A generator (5) connected to an engine (2) generates alternating current power. A converter (30) is conn...  
WO/2011/060280A3
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/2011/124745A1
The invention relates to an adjustment device (1) for controlling the electric drive (2) of an elevator in connection with a voltage reduction of the supplying network. The electric drive of an elevator comprises an electric motor (3) an...  
WO/2011/120679A2
The invention relates to a transformerless cycloconverter for connecting a first three-conductor grid (50), in particular a three-phase grid, to a second three-conductor grid (51), in particular a three-phase grid, by means of bridge mod...  
WO/2011/115330A1
The present disclosure relates to an automatic voltage regulator, comprising: a primary coil unit that induces an alternating current (AC) voltage, inputted from a power source, to a secondary coil according to a turn ratio; a secondary ...  
WO/2011/112630A1
A ground power unit (14) having a power supply unit capable of accepting a wide range of AC input voltages and producing one or more DC power signals for powering components of the GPU is disclosed. In one embodiment, the power supply un...  
WO/2011/109969A1
A high-voltage insulation power supply circuit comprises at least a magnetic transformer and a high-voltage-resistant wire connected to the magnetic transformer. A high-voltage insulation rod comprises at least a magnetic transformer, a ...  
WO/2010/015461A3
The invention relates to a device (12) comprising an electric machine (16), a voltage detection device, and an analysis device. A fixed or movable part of the electric machine (16) has a field winding (F1) to which a first electric volta...  
WO/2011/086108A4
The invention relates to a radio-frequency (RF) voltage supply system (1) for supplying a multipole mass spectrometer, in particular a quadrupole mass spectrometer, with the alternating RF voltage (142) used to generate a multipole field...  
WO/2011/104285A1
The invention relates to a method for compensating for fluctuations in the power output by an electrical machine (10), which operates as a generator, to a power supply network by means of an electrical energy storage system (68) with rec...  
WO/2011/100817A1
A microprocessor operated controller device and associated method for modifying an AC input power to provide a reduced power AC output power to a load when coupled to the controller device. The AC output power has a series of cut-out pul...  
WO/2011/100819A1
A controller device and corresponding method for modifying an AC input power to provide a reduced power AC output power to a load when coupled to the controller device. The AC output power has a series of cut-out pulses in half cycles of...  
WO/2011/097852A1
An energy supply system of electronic high voltage power mutual-inductor, at least includes: an input module, used to receive current and eliminate disturbance in the current; a transition module, used to transfer the received current to...  
WO/2011/070481A3
Driver circuits (1) for driving load circuits (2, 3) receive source signals from sources and provide feeding signals to the load circuits (2,3) and charging signals to capacitor circuits (21). These capacitor circuits (21) provide suppor...  
WO/2011/095828A1
A lighting control system comprises an input for receiving a mains supply voltage; an output for providing an output voltage signal for powering plural lamps; a controller; a first transformer connected to the input and being for reducin...  
WO/2011/097203A1
Photosensor circuits include a relay coil configured to control application of an alternating current (AC) power source to a load. The circuit includes a pulse width modulator circuit configured to generate a pulse width modulated signal...  
WO/2011/092475A1
The present invention relates to an apparatus, system and method for controlling voltage. The voltage control apparatus, which is for controlling the voltage of a domestic power supply, comprises an electrical input (108, 109, 208, 209, ...  

Matches 701 - 750 out of 7,471