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Patent Searching and Data


Matches 251 - 300 out of 7,034

Document Document Title
WO/2014/044089A1
An on-line uninterrupted power supply topology. A single-phase topology comprises a major loop and an auxiliary loop. A power conversion stage of the major loop includes first to fourth branches connected in parallel between a positive b...  
WO/2014/046012A1
The present invention is a single-phase/three-phase direct conversion device having an improved input amplitude modulation factor. During a first period (T1) during which, when the AC waveform outputted by a single-phase AC power supply ...  
WO/2014/031585A3
A system and method for performing diagnostics in a medium voltage drive. The system includes a power cell (405) and a bypass mechanism. The bypass mechanism is operably connected to(410) output terminals (T1,T2) of the power cell and co...  
WO/2014/031585A2
A system and method for performing diagnostics in a medium voltage drive. The system includes a power cell and a bypass mechanism. The bypass mechanism is operably connected to output terminals of the power cell and configured to create ...  
WO/2014/030202A1
A power converter (1) is equipped with three AC input terminals provided per phase on the three-phase AC input side, a reactor connected to each of the AC input terminals, one AC output terminal provided per phase on the three-phase AC o...  
WO/2014/030259A1
Provided is a voltage control apparatus that can step up the voltage of an inputted polyphase alternating current and stably supply high voltage. The voltage control apparatus (10) is provided with: a zero-crossing detection means (20) t...  
WO/2014/027198A1
A method for determining power consumption reduction and/or energy saving arising from the use of a voltage regulation device (1) is described. The method comprises calculating a power reduction and/or energy saving resulting from use of...  
WO/2014/028866A2
An energy efficient apparatus includes a switching device, a frequency dependent reactive device, and a control element is provided. The switching device is coupled to a source of electrical power and includes a pair of transistors and i...  
WO/2014/020703A1
A matrix converter according to one embodiment comprises a plurality of bidirectional switches arranged between an AC power source and an AC load, and a control unit for controlling the plurality of bidirectional switches. The control un...  
WO/2014/020898A1
In the present invention, soft-switching is maintained for a power converter that is capable of bidirectional power transfer. This power converter is equipped with a phase bridge (1), a phase bridge (2) that is connected in parallel to p...  
WO/2014/016532A3
The present invention concerns an adjustment device intended to equip electrical networks, and more particularly a device (3) for dynamically adjusting the voltage of an electrical network (1) having a first voltage and an electrical net...  
WO/2014/016532A2
The present invention concerns an adjustment device intended to equip electrical networks, and more particularly a device for dynamically adjusting the voltage 3 of an electrical network having a first voltage 1 and an electrical network...  
WO/2014/014912A2
Methods and systems are described for providing a high frequency high voltage source. For example, a power source for use in a particle accelerator, an arc welder or an inductive heater.  
WO/2014/014912A3
Methods and systems are described for providing a high frequency high voltage source. For example, a power source for use in a particle accelerator, an arc welder or an inductive heater.  
WO/2014/007803A1
An electrical ballast system having a toroidal current transformer having a core with a gap of predetermined dimensions, a primary winding, and a secondary winding. The primary winding is connected in series to a lamp load circuit and th...  
WO/2014/005639A1
The invention relates to a device (100) for a three-phase load (200). In order to provide an improved device (100) for a three-phase load (200), which device can be constructed in an in particular space-saving and cost-saving manner, the...  
WO/2014/000490A1
The present invention provides a five-level power converter and its controlling method. The five-level power converter comprises an inverter and at least one rectifier. Said rectifier comprises at least one rectify-controlling circuit an...  
WO/2014/004289A1
A three phase full resonant cyclo-converter (95) suitable for converting a three phase AC supply to a DC output. In one embodiment the cyclo-converter consists of two half bridge cyclo-converters (96,97) driving a resonant circuit. The m...  
WO/2014/001402A1
Constant current regulator (10) for supplying a series circuit (9) of a lighting installation with an output electrical power corresponding to a predetermined output power, comprising a plurality of modules (13) electrically connectable ...  
WO/2013/189952A3
The invention relates to a reversible matrix converter circuit with n levels per phase comprising n conversion arms exhibiting on one side n ends for generating or receiving respectively n intermediate DC voltage levels, and exhibiting o...  
WO/2013/189952A2
The invention relates to a reversible matrix converter circuit with n levels per phase comprising n conversion arms exhibiting on one side n ends for generating or receiving respectively n intermediate DC voltage levels, and exhibiting o...  
WO/2013/186065A1
The invention relates to a method for estimating the value of a braking resistor (Rf) used in a power converter connected to an electric motor (M). The power converter comprises a braking cell (CelF) connected to the first power supply l...  
WO/2013/185847A1
The present invention relates to a power converter adapted to convert at least one AC input voltage into an AC output voltage, a power converter (2) comprising: an input signal conversion circuit (6) having half-bridge connected switches...  
WO/2013/179463A1
This power conversion apparatus is provided with a plurality of power conversion circuits (1), each of which is configured of switching elements (4). The power conversion apparatus is also provided with: direct current conductive bodies ...  
WO/2013/178505A1
The present invention relates to a half bridge induction heating generator, comprising at least one power terminal (10) provided for a direct current voltage, at least one ground terminal (12), and four capacitors (C2, C3, C4, C5) formin...  
WO/2013/171800A1
A first period in which a voltage Vin is equal to or greater than a positive first reference voltage, a second period in which the voltage Vin is equal to or less than a negative reference voltage, and a third period in which the voltage...  
WO/2013/166870A1
A multilevel inverter comprises a first boost apparatus (102) having an input coupled to a positive dc bus and a second boost apparatus 106) having an input coupled to a negative dc bus. The multilevel inverter further comprises a first ...  
WO/2013/163863A1
Provided is an ECM motor controller adapting for various frequencies and power supply voltages. The controller comprises a motor microprocessor, an inverter, a signal detection and feedback circuit, as well as a power supply. The power s...  
WO/2013/158605A1
A dual function solid state power converter operable from a three phase AC input current simultaneously provides; an AC or DC output current on an aircraft power cable which extends from a stowed position to provide ground power to a par...  
WO/2013/153571A1
The purpose of the invention is to provide a power conversion device capable of supplying a constant voltage to a load against a wide range of voltage variation of an AC power supply while avoiding size increase, cost increase, and effic...  
WO/2013/152910A1
The invention relates to a control transformer, designed as a phase-shifting transformer, wherein semiconductor switching elements are provided for each phase on a control winding (2, W1, W2, W3) having a plurality of partial windings (W...  
WO/2013/149458A1
A UPS power source based on a phase-shifting auto-transformer and dual 6-pulse rectifiers comprises a 12-pulse phase-shifting auto-transformer T1, two paths of output devices, energy storage devices, bypass static switch devices and char...  
WO/2013/150572A1
Provided is a power conversion device capable of supplying a fixed voltage to a load even when the voltage of a three-phase AC power supply fluctuates. A series circuit comprising a switching element (Q1) and a switching element (Q2), an...  
WO/2013/147933A1
An apparatus provides electrical power to a ship in port. A first interface interconnects the apparatus with a power grid of the port receiving an input power signal. A second interface interconnects the apparatus with an electrical powe...  
WO/2013/148221A1
A load control device adapted to control the amount of power provided to an electrical load utilizing a phase control signal that operates in a reverse phase control mode, a center phase control mode, and a forward phase control mode. Th...  
WO/2013/145854A1
Provided is an electrical power conversion apparatus that suppresses the increase in leakage current when reverse voltage is applied to a reverse blocking insulated gate bipolar transistor so as to reduce loss caused by the leakage curre...  
WO/2013/143623A1
The invention relates to a method for operating a converter circuit (1). The controllable power semiconductor switches of the rectifier unit (2) of the converter circuit (1) are controlled using a rectifier switch signal (SG), and the co...  
WO/2013/146560A1
Provided is a highly efficient frequency conversion device having high reliability and little electromagnetic noise. The frequency conversion device is provided with: a primary winding (12) in which a plurality of windings having a multi...  
WO/2013/140287A1
A low-voltage power supply apparatus (900A) providing power to an neutral-less two-wire electronically controlled switch, including a first power supply (901) having a first DC bus (910+, 910-) electronically coupled to a rectifier bridg...  
WO/2013/136772A1
The present invention provides a copper wire rod softening device which can stably soften a copper wire over a broad range from low speed area to high speed area. The copper wire (2) is guided to first, second and third electrode sheaves...  
WO/2013/134994A1
A naturally freewheeling alternating current chopper main circuit structure comprising, connected to a single-phase circuit or to a three-phase circuit, an alternating current chopper main circuit (1) and an inductive load (2). The alter...  
WO/2013/137518A1
A bidirectional high-frequency resonator and a bidirectional transformer using the same are disclosed. The disclosed bidirectional transformer comprises: a bidirectional high-frequency transformer for converting between a first high-volt...  
WO/2013/136378A1
Provided is a power conversion apparatus which can supply a constant voltage to a load even if the voltage of an alternating current power supply is fluctuated. The power conversion apparatus is provided with a power conversion circuit w...  
WO/2013/132538A1
Provided is a power conversion method that is excellent in efficiency and reliability and used for converting a single-phase AC voltage to a two-phase AC voltage. An input voltage (in), which is a single-phase AC voltage, is received, an...  
WO/2013/132545A1
Provided is a power converter that is capable of supplying a constant voltage to a load even if the voltage of an AC power source fluctuates. The power converter is equipped with a power conversion circuit comprising the following: an in...  
WO/2013/131400A1
Disclosed are an electric locomotive traction converter and electric drive system, wherein a main circuit of the traction converter comprises at least one set of main conversion modules, each set of main conversion modules comprising at ...  
WO/2013/128991A1
The present invention is a power conversion device that is capable of suppressing an increase in DC voltage due to regenerated current. An inverter (3) converts DC voltage applied between a first and second power supply line (LH, LL) to ...  
WO/2013/127910A3
The invention relates to a power-supply system comprising at least one power-supply module 1 for supplying power to at least one electrical appliance 2, and generating, from a voltage Vl and a current Il, from a high-voltage line 4, an i...  
WO/2013/130054A1
An uninterruptible power supply includes a first power converter, a second power converter, and a DC-to-AC converter coupled to the first power converter and the second power converter. The first power converter includes a first AC-to-DC...  
WO/2013/128982A1
The present invention is an indirect matrix converter that is capable of improving the precision of current detection. A converter (1) receives the input of an alternating-current voltage, converts the alternating-current voltage to a di...  

Matches 251 - 300 out of 7,034