Patent application number | Description | Published |
20090217724 | MECHANICAL PRESS DRIVE SYSTEM - A method for operating a mechanical press including an electric drive motor, a drive control for controlling the motor, a ram, a flywheel, a clutch and a member for translating rotational motion of the flywheel in a first rotation direction into a linear motion of the ram arranged to be lowered and raised along a linear path for operating the press to carry out a press production cycle. The press cycle includes a pressing part and one or more non-pressing parts. The press includes a second drive motor or actuator arranged connected to the ram and by providing a control output to the drive control means, the speed of the second drive motor is made variable during at least one part of the press production cycle. The press may be reversed between production cycles. A press and system including such a press. | 09-03-2009 |
20110089763 | Battery Energy Source Arrangement And Voltage Source Converter System - The invention relates to power networks, and in particular to a battery energy source arrangement and voltage source converter system in such network. The battery energy source arrangement includes battery energy storage, having one or more parallel-connected battery strings and a mechanism for connecting a voltage of the battery strings to a load. The battery energy source arrangement further includes battery string voltage adapter devices connected in series with respective ones of the one or more battery strings wherein the battery string voltage adapter devices are designed to handle only a fraction of the voltage handled by the battery strings. | 04-21-2011 |
20110140529 | Battery Unit Arrangement For High Voltage Applications, Connector And Disconnector Arrangement And Method - A battery unit arrangement for high voltage applications. The battery unit arrangement includes a battery unit having a battery chassis, and a switching device. The switching device includes switching mechanism for switching the battery chassis between two positions, a first position connecting the battery chassis to a pole of the battery unit | 06-16-2011 |
20110140530 | Power Apparatus For A High Voltage Electrical Power System - A power apparatus for a high voltage electrical power system, that includes a voltage source converter and a high voltage dc power source including one or more strings having a plurality of dc power source members connected in series, and switches configured to connect and disconnect the strings, where the switches are solid-state switches, each string is subdivided into a plurality of dc power source units each dc power source unit including a plurality of dc power source members connected in series and each dc power source unit is provided with one of the solid-state switches configured to connect and disconnect the dc power source unit, and that all solid-state switches in the string are arranged so that they are turned on and off simultaneously. | 06-16-2011 |
20110217575 | Arrangement Of Stationary Batteries - A cassette for a battery stack, including a casing for a battery pack, which casing is made of a non-conducting material. The casing has a front side with an opening for receiving the battery pack. Preferably, the casing has a back side, opposite the front side, the back side being provided with electrical connections leading into the casing and arranged to connect to the poles of a battery pack when a battery pack is inserted into the casing through the front side. Arrangement of the cassettes is also provided, wherein the cassettes in the arrangement is placed in mechanical connection on top of each other. | 09-08-2011 |
20120063181 | Modular Voltage Source Converter - Voltage source converter based on a chain-link cell topology including one or more phases, each of the phases having one or more series-connected chain-link cell modules connected to each other. The output voltage of the voltage source converter is controlled by control signals applied to the series-connected chain-link cell modules. In case of failure of a chain-link cell module, that module is controlled, by the control signals, such that zero output voltage is provided at its output voltage AC terminal. | 03-15-2012 |
20120086412 | Arrangement For Exchanging Power - Power exchanging arrangement, in shunt connection, with a three-phase electric power network including on one hand for each said phase a reactive impedance element and a Voltage Source Converter connected in series with said element, and on the other hand a control unit configured to control semiconductor devices of turn-off type of said converter for generating a voltage with a fundamental frequency being equal to the fundamental frequency of the voltage of the respective said phase and by that control a flow of reactive power between said arrangement and the respective phase of said electric power network. Each Voltage Source Converter includes a series connection of switching cells in the form of so-called H-bridges including two switching elements connected in parallel and each having at least two semiconductor assemblies connected in series. Each switching cell further comprises at least one energy storing capacitor connected in parallel with said switching elements. | 04-12-2012 |
20120155130 | CONVERTER CELL MODULE, VOLTAGE SOURCE CONVERTER SYSTEM COMPRISING SUCH A MODULE AND A METHOD FOR CONTROLLING SUCH A SYSTEM - A converter cell module and a voltage source converter system. The converter cell module includes at least two switching elements, means for energy storage and an autotransformer. The autotransformer is arranged to bypass the converter cell module in the case of failure occurring in the converter cell module. | 06-21-2012 |
20120274142 | BATTERY ENERGY STORAGE SYSTEM WITH SHORT CIRCUIT PROTECTION, AND METHOD - A battery energy storage system including a control unit and a plurality of battery units. The battery units are arranged in series, and each battery unit includes a semiconductor switch and a battery module including a plurality of battery cells. Each battery module is connected in series with a respective semiconductor switch, and the control unit is operatively connected to the semiconductor switch and adapted to control the semiconductor switch of every battery unit. | 11-01-2012 |
20130026841 | Voltage Source Converter And A Method For Fault Handling Thereof - A voltage source converter having a plurality of cell modules connected in series, each cell module including a converter unit having an ac-side and a dc-side, and the voltage source converter includes a control unit adapted to control the converter units, where at least one of the cell modules includes a second redundant converter unit having an ac-side which is connected in parallel with the ac-side of the first converter unit and the control unit is configured to substantially synchronously control the first and the second converter units. | 01-31-2013 |
20130049472 | Energy Storage Device For A Power Compensator And A Method For Control Thereof - An energy storage device for a power compensator including a battery stack including a plurality of battery units connected in series, each of the battery units including one or more parallel-connected battery modules including a plurality of battery cells, where each battery unit further includes a bypass switch connected in parallel with the battery modules and the energy storage device comprises a control unit which is operatively connected to the bypass switches and adapted to receive information on a failure in any of the battery modules and to close the bypass switch in order to bypass the battery unit in case of a failure in any of the battery modules of the battery unit. | 02-28-2013 |
20130300379 | High Voltage DC Power Source And A Power Apparatus For A High Voltage Electrical Power System - A high voltage dc power source for providing a charging current to an electronic device, including one or more strings connected in parallel, each string being subdivided into dc power source units connected in series and each string being provided with a solid-state switch configured to connect and disconnect the string, and a control unit adapted to turn on and turn off the solid-state switch, and the control unit is configured, upon receiving an order to connect the string, to control the switch of the string to be alternately turned on and off so that a soft charging of the electronic device is achieved. | 11-14-2013 |
20140055116 | Method And Control Arrangement In A Power System - A method of controlling a magnitude of an electrical parameter in a power system via a high voltage electron tube. The method includes the steps of measuring the magnitude of the electrical parameter; generating a control signal based on the magnitude of the electrical parameter and on a reference magnitude of the electrical parameter; and switching the high voltage electron tube via the control signal such that the reference magnitude of the electrical parameter is essentially obtained. A control arrangement and a power system is also presented. | 02-27-2014 |
20140369094 | CONVERTER CELL AND ASSOCIATED CONVERTER ARM AND METHOD - It is presented a converter cell comprising: a first terminal and a second terminal; an energy storage device connected on a first end to the second terminal; a first switch connected on a first end to the first terminal; a second switch arranged between the two terminals; and a third switch connected between a second end of the first switch and a second end of the energy storage device. A corresponding converter arm and method are also presented. | 12-18-2014 |
20150055385 | MODULAR VOLTAGE SOURCE CONVERTER - A modular voltage source converter ( | 02-26-2015 |