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Matches 401 - 450 out of 2,773

Document Document Title
WO/2009/047769
A power providing system for an electrical device comprising: a secondary inductor, wired to the electrical device, for inductively coupling with a primary inductor hardwired to a power supply. The secondary inductor is incorporated into...  
WO/2009/047768
A system, for providing power to a workspace by induction, comprises at least one inductive power outlet incorporated into a bounding surface of the workspace. The inductive power outlet comprises at least one primary inductor connectabl...  
WO/2009/045663
A portable device for generating two electrical phases from a single electrical phase. The portable device includes a housing having a toroidal transformer therein. An input terminal block and an output terminal block are mounted to the ...  
WO/2009/044293
A step wave power converter comprises multiple different bridge circuits configured to convert DC voltage inputs into AC voltage outputs. A controller is configured to estimate an average voltage output from the multiple different bridge...  
WO/2009/039305
Methods and apparatus to provide low harmonic distortion AC power for distribution by converting energy from natural or renewable sources into electrical form, and constructing a current waveform on a primary winding of a transformer by ...  
WO/2009/039305
Methods and apparatus to provide low harmonic distortion AC power for distribution by converting energy from natural or renewable sources into electrical form, and constructing a current waveform on a primary winding of a transformer by ...  
WO/2009/034420
A power system and a control method thereof are disclosed. The power system comprises: providing a plurality of power sources; electrically connecting a plurality of converters between the power sources and at least one load, wherein the...  
WO/2009/036430
A system for bypassing a power cell of a power supply, the system including a multi-winding device having a primary winding and a plurality of three-phase secondary windings, a plurality of power cells, wherein each power cell is connect...  
WO/2009/036430
A system for bypassing a power cell of a power supply, the system including a multi-winding device having a primary winding and a plurality of three-phase secondary windings, a plurality of power cells, wherein each power cell is connect...  
WO/2009/033574
The invention relates to a system and a method for operating a system which comprises a capacitor (7), especially a reservoir capacitor, that can be charged via at least one rectifier. The system is characterized by at least one means fo...  
WO/2009/032660
A colorimetric composition is disclosed comprising a polycarbonate resin, a dye, and a thiopropionate. The composition undergoes an irreversible color shift to a darker color upon exposure to sunlight or UV radiation. Processes for produ...  
WO/2009/016340
A discrete-time voltage-oriented control (DT- VOC) scheme for controlling a voltage source converter (VSC) active rectifier/inverter (2) involving the calculation of a discrete-time model of the active rectifier/inverter and load system ...  
WO/2009/016267
The invention presents a control arrangement of an electric motor (2) used with a frequency converter (1 ) as well as a method for controlling an electric motor used with a frequency converter. In the invention the frequency converter is...  
WO/2009/013992
Provided is a control method for a matrix converter using a two-phase modulation method of a low loss, which is enabled to output a stabilized voltage of a high precision by suppressing the output voltage error to occur at the time of ou...  
WO/2009/011783
In one embodiment, a method is provided for providing power to a radio-frequency (RF) component capable of operating under multiple communication standards, wherein each standard has a respective operating frequency. The method includes:...  
WO/2009/008742
The present invention relates to a multi output inverter that is adapted to supply mains powered appliances (47-49) and/or poly-phase motors (50, 51). The inverter is also adapted to reduce ripple current.  
WO/2009/004466
A voltage regulator circuit having two terminals adapted to be connected to an AC voltage generator (30) and respectively to a load (39) to be supplied with a predetermined effective voltage. The circuit comprises a bidirectional electro...  
WO/2009/004466
A voltage regulator circuit having two terminals adapted to be connected to an AC voltage generator (30) and respectively to a load (39) to be supplied with a predetermined effective voltage. The circuit comprises a bidirectional electro...  
WO/2008/155446
The power control of a transport system comprises an electric motor for moving the transport appliance as well as a power supply appliance of the motor, which comprises an intermediate circuit. The power supply appliance of the motor is ...  
WO/2008/156979
A system and method for producing anharmonic multi-phase currents wherein the harmonic component of an inverter is filtered and superimposed with a series of control pulses to create a control signal. The control signal is fed back to th...  
WO/2008/155445
The power control of a transport system comprises an electric motor (2) for moving the transport appliance as well as a power supply appliance (3) of the motor, which comprises an intermediate circuit (4,5). The power supply appliance of...  
WO/2008/155445
The power control of a transport system comprises an electric motor (2) for moving the transport appliance as well as a power supply appliance (3) of the motor, which comprises an intermediate circuit (4,5). The power supply appliance of...  
WO/2008/156979
A system and method for producing anharmonic multi-phase currents wherein the harmonic component of an inverter is filtered and superimposed with a series of control pulses to create a control signal. The control signal is fed back to th...  
WO/2008/151859
The inverter compound (3, 18, 20) according to the invention comprises at least one inverter power element (101, 102, 115, 107, 109, 111, 113, 115, 117) operated on an intermediate circuit (6). Said inverter compound further comprises a ...  
WO/2008/151145
A four pole, three-phase, NPC converter that produces virtually no common mode voltage. The low common mode voltage output is achieved by constraining the switch states of the NPC converter. A fourth pole and associated control balance t...  
WO/2008/140457
A matrix converter includes a plurality of switching elements and is adapted to receive a multi-phase alternating current (AC) input signal having an input frequency and to generate a multi-phase AC output signal having an output frequen...  
WO/2008/138911
The invention concerns a method and device for providing redundant control of a controllable current valve (46, 48) in a converter (16) of a power transmission system (10). The device includes a first converter control unit (34) sending ...  
WO/2008/138864
A control unit (CTL) has a link capacitor (C) and an inverter (WR) and is designed for controlling an electrical machine (EM). For operating the control unit (CTL), the inverter (WR) is controlled in such a way that a quick discharge of ...  
WO/2008/130889
A harmonics attenuator employing a combination controller that incorporates features of a classic controller and a state space controller to function as a hybrid controller unit, arranged in a manner that the two controllers compliment e...  
WO/2008/126593
[PROBLEMS] To provide a space vector modulation method for a matrix converter which uses only one carrier for three phases upon carrier comparison. [MEANS FOR SOLVING PROBLEMS] Provided is a matrix converter space vector modulation metho...  
WO/2008/126591
[PROBLEMS] To provide a space vector modulation method for a matrix converter which can convert an I/O waveform into a sine wave and reduce the number of switching times even upon transfer between sectors. [MEANS FOR SOLVING PROBLEMS] A ...  
WO/2008/124808
An oscillator (10) for synchronizing and controlling a multi-phase, interleaved power supply system (30) that has a plurality of power sources. The oscillator includes a first oscillator, having a pulse generator and a timing capacitor (...  
WO/2008/124808
An oscillator (10) for synchronizing and controlling a multi-phase, interleaved power supply system (30) that has a plurality of power sources. The oscillator includes a first oscillator, having a pulse generator and a timing capacitor (...  
WO/2008/123839
The present invention relates to the field of electronics and automatics; particularly, it relates to the processes of conversion of alternating current energy at input into alternating current energy at output, so that the voltage to ch...  
WO/2008/124225
A lighting control circuit includes a dimmer circuit which is provided for an electrical outlet. An inductive load detection circuit is provided for identifying the presence of an inductive load in the electrical outlet. When an inductiv...  
WO/2008/117166
A power converter apparatus, such as an uninterruptible power supply (UPS), includes an inverter having an input coupled to a first DC bus and a second DC bus and configured to generate an AC output with respect to a neutral terminal at ...  
WO/2008/117166
A power converter apparatus, such as an uninterruptible power supply (UPS), includes an inverter having an input coupled to a first DC bus and a second DC bus and configured to generate an AC output with respect to a neutral terminal at ...  
WO/2008/116042
A power supply to provide electrical power to one or more loads. The power supply may include a resonant air core transformer to provide an adjustable and adaptable source of power to electronic devices. The power supply may include isol...  
WO/2008/113140
The present invention relates to a control system, a method and arrangement for motors and motor-compressors, designed for operation in a wide voltage range of the feed network. The control system, method and arrangement for motors and m...  
WO/2008/110964
A motor control circuit (MC) comprising input terminals (ITl, IT2) to receive a rectified input voltage (Vrm), and output terminals (OTl, 0T2) to supply a motor drive signal (Vm). A switching circuit (1) is alternately in an on- state (T...  
WO/2008/108147
Provided is a power conversion device which can cancel distortion of an output voltage and an output current as well as a voltage drop characteristic to a semiconductor element. The power conversion device connects respective phases of a...  
WO/2008/104017
The present invention relates to a method and apparatus for power generation, and in particular a method and apparatus for the control of electrical power generation for use primarily with wind turbines. A method of electrical power gene...  
WO/2008/103491
A load control device is adapted to be disposed in series with AC voltage source and an electrical load and is operable to provide substantially all voltage provided by the AC voltage source to the load. The load control device comprises...  
WO/2008/103524
A linear variable differential transformer comprising a coil form; a first primary coil; an optional second primary coil; a first secondary coil; and a second secondary coil; wherein the windings of the secondary coils create complimenta...  
WO/2008/099049
The invention concerns a power control apparatus and a method for supplying power between an electric machine (1) and an energy source (2, 19). The power control apparatus contains at least two converters (4, 5, 6) comprising a plurality...  
WO/2008/097749
Systems and methods for operating a variable speed drive to receive an input AC power at a fixed AC input voltage and frequency and provide an output AC power at a variable voltage and variable frequency. The variable speed drive include...  
WO/2008/097749
Systems and methods for operating a variable speed drive to receive an input AC power at a fixed AC input voltage and frequency and provide an output AC power at a variable voltage and variable frequency. The variable speed drive include...  
WO/2008/091907
Three coils, each having several serial windings (A1-A4 or 5; B1-B4 or 5; C1-C4 or 5), have selected windings connected in a delta (A2-A4 or 5; B2-B4 or 5; C2-CR or 5). Input AC power is applied through outrigger windings (A1, B1, C1)at ...  
WO/2008/092154
Systems and methods for synchronous operation of variable speed drives having active converters include extending the synchronous operation of an active converter to the AC mains voltage during complete line dropout. A phase angle contro...  
WO/2008/092152
Systems and methods for improved Variable Speed Drives having active inverters include an input filter for filtering common mode and differential mode currents. A three-phase inductor has three windings, each winding of the three-phase i...  

Matches 401 - 450 out of 2,773