| Patent application number | Description | Published |
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| 20100328977 | METHOD FOR CONTROLLING A VOLTAGE SOURCE CONVERTER AND A VOLTAGE CONVERTING APPARATUS - In a method for controlling a Voltage Source Converter having at least one phase leg comprising a series connection of switching elements, in which each said element has at least two semiconductor devices of turn-off type, at least two free-wheeling diodes connected in parallel therewith and at least one energy storing capacitor, each said switching element is controlled according to a Pulse Width Modulation pattern so that each switching element is switched to change between applying a zero voltage and the voltage across its capacitor across its terminals each time a saw tooth voltage wave for that switching element crosses a reference alternating voltage belonging to that switching element. | 12-30-2010 |
| 20110038193 | VOLTAGE SOURCE CONVERTER - A Voltage Source Converter having at least one phase leg connected to opposite poles of a direct voltage side of the converter and comprising a series connection of switching elements including at least one energy storing capacitor and configured to obtain two switching states, namely a first switching state and a second switching state, in which the voltage across said at least one energy storing capacitor and a zero voltage, respectively, is applied across the terminals of the switching element, has semiconductor chips of said switching elements arranged in stacks comprising each at least two semiconductor chips. The converter comprises an arrangement configured to apply a pressure to opposite ends of each stack. | 02-17-2011 |
| 20110080679 | PROTECTING APPARATUS - An apparatus for protecting equipment connected to a high voltage direct current line comprises a current valve having at least one semiconductor device and a rectifying member connected in anti-parallel therewith. A surge arrester is configured to connect said current valve to said line, and a control unit is configured to control the current valve to conduct for draining current from the line to ground. | 04-07-2011 |
| 20110080758 | PLANT FOR TRANSMITTING ELECTRIC POWER - A plant for transmitting electric power comprises a direct voltage network for High Voltage Direct Current and at least one alternating voltage network connected thereto through a station. The station comprises at least one Voltage Source Converter adapted to convert direct voltage into alternating voltage and conversely. In the direct voltage network at least one parallel connection of at least one semiconductor device of turn-off type and a resistor is connected in series with a direct voltage line of the direct voltage network. | 04-07-2011 |
| 20110096575 | PLANT FOR TRANSMITTING ELECTRIC POWER - A plant for transmitting electric power through HVDC comprises two converter stations interconnected by a bipolar direct voltage network and each connected to an alternating voltage network. Each converter station has a Voltage Source Converter with switching cells each including at least one energy storing capacitor. The Voltage Source Converters are configured to utilize a direct voltage having a higher magnitude for a first of the poles than for a second thereof with respect to ground. | 04-28-2011 |
| 20110103116 | PLANT FOR TRANSMITTING ELECTRIC POWER - A plant for transmitting electric power comprising a direct voltage network ( | 05-05-2011 |
| 20110222323 | POWER CONVERTER WITH DISTRIBUTED CELL CONTROL - A device for converting a DC voltage into an AC voltage and vice versa comprises a control system to control the voltage conversion and at least one phase leg ( | 09-15-2011 |
| 20110233608 | CONNECTION ARRANGEMENT FOR SEMICONDUCTOR POWER MODULES - A semiconductor power module includes at least two sub modules. The sub modules include at least one respective transistor having a collector, an emitter, and a gate. The module includes a connection arrangement having a collector terminal unit for connecting the collectors of the at least two sub modules collectively to external circuit components, at least two emitter terminal units for connecting the respective emitters of the at least two sub modules individually to external circuit components, and at least two gate terminal units for connecting the respective gates of the at least two sub modules individually to external circuit components. | 09-29-2011 |
| 20110260545 | VOLTAGE IN A VOLTAGE SOURCE CONVERTER, A VOLTAGE SOURCE CONVERTER AND A METHOD FOR CONTROL THEREOF - A VSC converter includes in each valve one first semiconductor device of turn-off type with a voltage blocking capacity rating of a first, high level and connected in parallel therewith a series connection of a plurality of second semiconductor devices of turn-off type with a voltage blocking capacity rating of a second, lower level. A control arrangement of the converter is configured to switch a said valve into a conducting state starting from a forward biased blocking state of the valve by controlling the second semiconductor devices to be turned on and then the first semiconductor devices to be turned on with a delay, and at the end of the conducting state to turn off the first semiconductor device in advance of turning the second semiconductor devices off. | 10-27-2011 |
| 20110267852 | FAULT PROTECTION IN VOLTAGE SOURCE CONVERTERS WITH REDUNDANT SWITCHING CELLS VIA MECHANICAL SWITCHES BEING CLOSED PYROTECHNICALLY - A Voltage Source Converter has a series connection of switching assemblies, in which each switching assembly has an electrically conducting plate member carrying a plurality of semiconductor chips each having at least a semiconductor device of turn-off and a free-wheeling diode connected in parallel therewith. Said chips are connected in parallel with each other by each being connected by at least one individual conductor member to a said plate member of an adjacent switching assembly of said series connection. Each switching assembly has a mechanical switch configured to be open under normal operation of the switching assembly and configured to enable connection of said plate member of the switching assembly to the plate member of an adjacent switching assembly for bypassing said semiconductor chips of the switching assembly to which the mechanical switch belongs in the case of occurrence of a short circuit current through a semiconductor chip of the switching assembly. | 11-03-2011 |
| 20110278041 | DC Cable For High Voltages - A DC cable for high voltages having at least an inner conductor surrounded by an insulating layer configured to take the voltage to be taken between the conductor and the surroundings of the cable. The insulating layer is formed by a plurality of superimposed film-like layers of insulating material each having isolated areas of metal on top thereof. The metal areas of consecutive such film-like layers are at least partially overlapping each other as seen in the radial direction of the cable so as to create a large number of small capacitors in said insulating layer of the cable. | 11-17-2011 |
| 20110310641 | METHOD OF UPGRADING A PLANT FOR TRANSMITTING ELECTRIC POWER AND SUCH A PLANT - A plant for transmitting electric power through HVDC includes two converter stations interconnected by a monopolar direct voltage network and each having an alternating voltage side for feeding electric power from one of said alternating voltage sides to the other. Each station has a line commutated converter. The plant is upgraded by making the direct voltage network bipolar, providing each station with a Voltage Source Converter and providing two switches for both line commutated converters or both Voltage Source Converters and a device configured to control said four switches. | 12-22-2011 |
| 20120067684 | System Adapted for One or More Vehicles, Which May be Driven Forward Electrically - The present invention has its application to a system for driving an electric and by one or more batteries powered vehicle along a roadway, comprising “a” one or more vehicles, which may be driven by an individual electric motor or motors and where in the respective vehicles exhibit a power-controlling control circuit for creating the necessary power and/or speed control and wherein required power i.a. can be provided primarily by a chargeable can be provided primarily by a chargeable battery set associated with the vehicle and “b” a plurality of road sections road portions divisible for the roadway, each being allotted one or more vehicle external electric stations for charging the battery set thereby and/or for supplying necessary power and energy for driving the vehicle. The underneath side of the mentioned vehicle is provided with a contact means displaceably positioned up and down and sideways, counted in the direction of transportation. Said roadway and its road sections or portions exhibits an elongated track or groove, each road section is supporting two rails in the groove and disposed under the driving path of the road section or portion. The rails being supplied with current and voltage. Said contact means is coordinated with a control equipment for creating simple adaptation of the contact means for registering the contact means for mechanical and electrical contact against said two rails. | 03-22-2012 |
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| 20090156235 | WIRELESS COMMUNICATIONS DEVICE WITH IMPROVED ANTENNA ADAPTIVITY - The invention discloses a wireless telecommunications device intended to communicate with an access point, such as a base station, in a wireless telecommunications system. The device comprises at least a first radio chain and at least a first and a second antenna, which antennas each have a certain radiation pattern, and which are used for receiving and transmitting information to and from the base station. The device includes a motion sensor for giving information on the spatial orientation of the device, and the device additionally includes means for utilizing said orientation information in order to control the total radiation pattern in the device's communication with the base station by controlling the phase and/or amplitude of signals associated with said first and second antennas. | 06-18-2009 |
| 20090197544 | DEVICE FOR IMPROVED ISOLATION CHARACTERISTICS IN A TELECOMMUNICATIONS SYSTEM - The invention discloses an apparatus in a wireless telecommunications system, comprising at least a first antenna of a first polarization and a second antenna of a second polarization. The apparatus additionally comprises a receiver and a transmitter, and is intended for communication with at least one other device in the wireless telecommunications system. The apparatus is equipped with means for estimating the polarization state of a signal which is received from the one other device, and the apparatus additionally comprises means for adapting the polarization state of signals transmitted from the apparatus to the one other device on the basis of said estimate of the received signal. | 08-06-2009 |
| 20100046382 | METHOD AND APPARATUS FOR IMPROVED SINGLE CELL ADAPTION DUE TO CHANGE IN ENVIRONMENT - A communication method for use in a wireless communications network is proposed, said method comprising the steps of—monitoring at least one property representative of the channel variability in time and/or frequency, for each of at least two channels in the cell, used to communicate with said at least two user terminals;—using the result of the monitoring to control, by a control node in the network or in one of the user terminals, the communication in the cell. The control of the communication may include artificially inducing time selectivity and/or frequency selectivity or selecting an operating mode for the cell. | 02-25-2010 |
| 20100190456 | Adaptive Antenna Transmission and Antenna Calibration - The present invention relates to a method for adapting transmission parameters in a transmitter T | 07-29-2010 |
| 20110065390 | POLARIZATION CO-ORDINATION - The present invention relates to a group (G | 03-17-2011 |
| 20110150118 | ANTENNA ARRANGEMENT FOR INTERFERENCE REDUCTION AND MIMO COMMUNICATION - The present invention relates to an antenna arrangement for use in a wireless communication system, where the arrangement comprises at least two single-polarized antenna functions. Each antenna function is adapted for radiating an antenna radiation lobe pattern having a horizontal extension in an azimuth plane, and a vertical extension in an elevation plane, perpendicular to the azimuth plane. The antenna functions both have a first polarization in a first direction. In a second direction separated from the first direction, the second antenna function has a second polarization and the first antenna function has a third polarization, the second polarization and the third polarization being orthogonal to each other. | 06-23-2011 |
| 20110169713 | Arrangement For Improved Isolation Between Adjacent Cell Areas - The present invention relates to a node in a wireless communication system, the node having a central point and comprising at least two antenna functions. Each antenna function is arranged to cover a corresponding sector area, the sector areas being positioned around the central point successively such that each sector area is adjacent to at least one other sector area separated by corresponding borders. The polarization of at least one of said antenna functions is variable between the borders of the corresponding sector area such that for each border, the polarizations of the antenna functions at each side of the border are essentially orthogonal at the border. The present invention also relates to a corresponding wireless communication system and corresponding antenna functions. | 07-14-2011 |
| 20110230143 | Method and Device in Over-the-Air Test Environment - The present invention relates to a device and method for simulating a radio channel with a defined characteristic between at least one antenna port ( | 09-22-2011 |
| 20110263215 | Method and Device in Over-the-Air Test Environment - The present invention relates to a device and method for simulating a radio channel with a defined characteristic between at least one antenna port ( | 10-27-2011 |
| 20120046039 | METHODS AND ARRANGEMENTS IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to methods and arrangements in a wireless communication system that enable the allocation of resources to UEs based on measurements of their antenna polarization, in order to suppress the interference between different UEs at a very low overhead cost. This is achieved by a solution where the scheduling unit retrieves information about the polarization of the UE antenna configurations, and based on this information allocates radio resources to the different UEs, with the aim to minimize the interference. The scheduling unit may retrieve the information from the RBSs or from the UEs. The RBS and the UE will determine the polarization and transmit information regarding this polarization to the scheduling unit. The scheduling unit coordinates the allocation of resources with other scheduling units if necessary. | 02-23-2012 |
| 20120140801 | Antenna Device - The invention relates to the technical field of radio communications, and in particular to an antenna device for a radio base station, and a method for precoding data in a Multiple-Input Multiple-Output (MIMO) system. Embodiments of the invention disclose a secondary precoder | 06-07-2012 |
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| 20080216873 | SYSTEM AND DEVICES FOR COLLECTING AND TREATING WASTE WATER FROM ENGINE WASHING - The present invention relates to the field of washing engines, particularly using washing liquids such as water and detergent or water only, and more specifically to systems, apparatus and a mobile cart comprising such a system for collecting and treating the waste water from engine washing operations. The system comprises a collecting device for collecting waste liquid during a washing operation of the engine and a treatment device for treating waste liquid collected during said washing operation. According to an embodiment, the system is arranged on a mobile cart ( | 09-11-2008 |
| 20090260660 | METHOD AND APPARATUS FOR CLEANING A TURBOFAN GAS TURBINE ENGINE - Device for cleaning a gas turbine engine, and in particular an engine of turbofan type. The present invention further relates to a method for cleaning such an engine. The device comprises a plurality of nozzles arranged to atomize cleaning liquid in the air stream in an air inlet of the engine up-stream of a fan of the engine. According to the invention, a first nozzle is arranged at a position such that the cleaning liquid emanating from the first nozzle impinges the surfaces of the blades substantially on the pressure side; a second nozzle is arrange at a position such that the cleaning liquid emanating from the second nozzle impinges the surfaces of the blades substantially on the suction side; and a third nozzle is arranged at a position such that the cleaning liquid emanating from the third nozzle passes substantially between the blades and enters an inlet of the core engine. Thereby, the different types of fouling found on the fan and in the core engine compressor of turbofan engine can be removed in an efficient manner. | 10-22-2009 |
| 20100132745 | NOZZLE AND METHOD FOR WASHING GAS TURBINE COMPRESSORS - A nozzle for cleaning a gas turbine unit during operation. The invention further relates to a method for washing a gas turbine unit during operation. The nozzle is arranged to atomize a wash liquid in the air stream in an air intake of the gas turbine unit and comprises a nozzle body comprising an intake end for intake of said wash liquid and outlet end for exit of said wash liquid. The nozzle further comprises a number of orifices that are connected to the outlet end and respective orifice is arranged at a suitable distance from a centre axis of said nozzle body, whereby the local density of the injected wash liquid in a desired area can be increased with preserved droplet size and thereby the efficiency of the cleaning process can be significantly improved at the same time as the risk for damaging the components in the gas turbine unit is significantly reduced. | 06-03-2010 |
| 20120031444 | PROBE CLEANING METHOD AND APPARATUS - A cleaning apparatus for cleaning measuring probes ( | 02-09-2012 |
