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Patent Searching and Data


Matches 401 - 450 out of 6,445

Document Document Title
WO/2009/109957A1
A circuit that receives a sinusoidal input voltage and produces an AC voltage having a variable value, including: an input for connection of a the sinusoidal input voltage (11); an output for connection to a load (31); and a switching ci...  
WO/2009/109453A1
The invention relates to a device for connecting at least one single-phase power supply line (4, 14, 15) that feeds the overhead line of a railroad track in particular to a three-phase power supply network (1). In the process, at least o...  
WO/2009/106673A1
The invention relates to a frequency converter (1), which is fitted to supply power between a polyphase alternating electricity source (2) and an electric machine (3). The frequency converter comprises a network rectifier (4) connected t...  
WO/2009/105437A2
Existing measurements of an input component (such as voltage or current) in a three phase power supply system are decomposed into a negative sequence component. The negative sequence component, which is significantly higher when a rectif...  
WO/2009/103505A3
The invention relates to a method for controlling a converter of a wind energy plant, said converter being connected to the rotor of a double-energized asynchronous generator for supplying electric energy to an electric power grid, where...  
WO/2009/103504A3
The invention relates to a method for controlling a converter (7) of a wind energy plant, the converter being connected to the rotor of a double-energized asynchronous generator (4) for supplying electric energy to a power grid (10), whe...  
WO/2009/105437A3
Existing measurements of an input component (such as voltage or current) in a three phase power supply system are decomposed into a negative sequence component. The negative sequence component, which is significantly higher when a rectif...  
WO/2009/103505A2
The invention relates to a method for controlling a converter of a wind energy plant, said converter being connected to the rotor of a double-energized asynchronous generator for supplying electric energy to an electric power grid, where...  
WO/2009/098201A1
The invention relates to a converter with a network-side and a load-side power converter (2, 4) that are connected together on the DC side in an electrically conductive manner, wherein an upper and a lower valve branch (T1, T3, T5; T2, T...  
WO/2009/096158A1
An inverter circuit (120) is constituted such that synchronous rectification is performed by six switching elements (130). Said switching elements (130) are constituted by unipolar elements (in this case, SiC MOSFETs) using a wide bandga...  
WO/2009/095528A1
The invention relates to a transport system and also to a method for supplying power in a transport system. The transport system comprises an electric motor (1) and also the power supply circuit (2) of the transport system connected to t...  
WO/2009/092234A1
An AC plasma ejection gun and its power supply method and a pulverized coal burner are provided. The ejection gun includes a power supply device, a front electrode and a rear electrode which are electrically conductive. The power supply ...  
WO/2009/087176A1
The invention relates to a power supply device (2) for an arc furnace (1) powered by an alternating current, and for controlling the active and reactive powers at said arc furnace. The supply device is provided on the side of a high-volt...  
WO/2009/082068A2
The present invention relates to a method of controlling a three-phase motor of an air conditioner by using an inverter including a total of three pairs of upper and lower arm switching elements connected in parallel, wherein the motor i...  
WO/2009/082066A2
The present invention relates to a motor controller of an air conditioner, including a converter for converting a commercial AC power into a DC power, an inverter including a plurality of switching elements, the inverter receiving the DC...  
WO/2009/082065A2
The present invention relates to a motor controller for air conditioner including a converter converting AC utility power into DC power; an inverter for compressor having a plurality of switching elements for inverter, the inverter conve...  
WO/2009/082065A3
The present invention relates to a motor controller for air conditioner including a converter converting AC utility power into DC power; an inverter for compressor having a plurality of switching elements for inverter, the inverter conve...  
WO/2009/082066A3
The present invention relates to a motor controller of an air conditioner, including a converter for converting a commercial AC power into a DC power, an inverter including a plurality of switching elements, the inverter receiving the DC...  
WO/2009/077011A1
The described invention relates to our supply arrangement, a supply unit and a method inwhich a switching element is con- nected in series to an operating voltage and an electrical load, wherein a supply unit supplies an electronic unit ...  
WO/2009/068745A1
There is provided a control circuit (200) comprising: a sampling controller configured to sample an output voltage (300) of a power converter at an appropriate time slot by opening a control loop; and a soft-start circuit configured to e...  
WO/2009/066838A2
The present invention relates to a motor controller for air conditioner including a converter having at least one switching element for converter, the converter converting AC utility power into DC power by a switching operation of the sw...  
WO/2009/066840A2
The present invention relates to a motor controller, including a converter for converting commercial AC power into DC power, an inverter including a plurality of switching elements, the inverter receiving the DC power, converting the DC ...  
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/2009/066838A3
The present invention relates to a motor controller (200) for air conditioner including a converter (210) having at least one switching element for converter, the converter converting AC utility power into DC power by a switching operati...  
WO/2009/066839A2
The present invention relates to a motor controller of an air conditioner, including an inverter including a plurality of switching elements and adapted to convert a DC voltage, input through switching operations of the switching element...  
WO/2009/066839A3
The present invention relates to a motor controller (200) of an air conditioner, including an inverter (220) including a plurality of switching elements and adapted to convert a DC voltage, input through switching operations of the switc...  
WO/2009/059372A1
The present invention proposes a hot surface igniter (HSI) controller which is transformerless and which is capable of delivering power from a 120/240 VAC RMS mains voltage, for example, to a load whose nominal operational voltage is equ...  
WO/2009/061219A2
An AC processing apparatus and method for high-power inductive power transfer (IPT) applications is disclosed which includes an input means for coupling to a voltage source, a processing means for producing an output signal based directl...  
WO/2009/061219A3
An AC processing apparatus and method for high-power inductive power transfer (IPT) applications is disclosed which includes an input means for coupling to a voltage source, a processing means for producing an output signal based directl...  
WO/2009/057866A2
A motor controlling method and apparatus of an air conditioner are disclosed. It is checked whether or not an operation frequency of a compressor motor is the same as or greater than a certain frequency (S610) and it is also checked whet...  
WO/2009/058680A1
An airplane ground support system includes a multi-voltage power supply. This system includes an air conditioning module and a control module having a display and a processor, the display and processor presenting an airplane type or clas...  
WO/2009/056666A1
The invention relates to a power supply arrangement, a power transformer (6) and also a method for supplying power in an elevator system. The power supply arrangement of the elevator comprises an elevator motor (1), a power supply circui...  
WO/2009/057866A3
A motor controlling method and apparatus of an air conditioner are disclosed. It is checked whether or not an operation frequency of a compressor motor is the same as or greater than a certain frequency (S610) and it is also checked whet...  
WO/2009/058680A8
An airplane ground support system includes a multi-voltage power supply. This system includes an air conditioning module and a control module having a display and a processor, the display and processor presenting an airplane type or clas...  
WO/2009/053520A1
The object of the invention is an arrangement in a direct connected drive in which the rotation speed of a motor connected to an actuator is controlled using a high frequency modulated frequency converter (4, 14, 16) supplying alternatin...  
WO/2009/054379A1
Provided is a power conversion device which can easily generate a carrier while suppressing distortion of an input current waveform. A switch element (Srp) is electrically connected when a carrier (C1) has a value 0 to drt and a switch e...  
WO/2009/053519A1
The object of the invention is a coupling arrangement when using a frequency converter (14, 16) to control an electrical machine (44) connected to an actuator, at least the electrical machine (44) being located in an explosive atmosphere...  
WO/2009/054380A1
Provided is a power conversion device which can easily generate a carrier while suppressing distortion of an input current waveform. A carrier generation unit generates a carrier having a waveform with a temporally constant inclination a...  
WO/2009/051320A2
The present invention relates to a motor controller (200) for an air conditioner and a motor control method. The motor controller is configured to have an AC/DC converter and an inverter built on the switching elements (220). Said invert...  
WO/2009/051320A3
The present invention relates to a motor controller (200) for an air conditioner and a motor control method. The motor controller is configured to have an AC/DC converter and an inverter built on the switching elements (220). Said invert...  
WO/2009/050124A1
The invention relates to a variable control device (10) connected in series with an electrical load (12) to be controlled on one phase of an AC electrical circuit. The control device (10) comprises: two power switches (J1, J2), of the no...  
WO/2009/047769A2
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/2009/047768A2
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/2009/045663A3
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/2009/044293A3
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/2009/039305A2
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/2009/039305A3
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/2009/034420A3
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/2009/036430A3
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/2009/036430A2
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...  

Matches 401 - 450 out of 6,445