Siljeström
Erika Siljeström, Skultuna SE
Patent application number | Description | Published |
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20130009491 | SWITCHING MODULE FOR USE IN A DEVICE TO LIMIT AND/OR BREAK THE CURRENT OF A POWER TRANSMISSION OR DISTRIBUTION LINE - A switching module, intended to be used in a medium or high voltage DC breaker or a DC current limiter, includes at least one power semiconductor switching element, a gate unit arranged to turn the at least one power semiconductor switching element on and off, respectively, according to a switching control signal, and an energy storage capacitor arranged to provide power to a power supply input of the gate unit. The switching module further includes a power transformation device arranged to receive an optical power signal, to transform the optical power signal into an electrical power signal and to provide the electrical power signal to the energy storage capacitor. | 01-10-2013 |
Erika Siljeström US
Patent application number | Description | Published |
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20140203847 | RELIABILITY IN SEMICONDUCTOR DEVICE CONTROL - A gate control device for a semiconductor device includes at least one power supply module, at least one optical communication interface for receiving optical signals from two valve control units and converting them to electric signals for supply to a corresponding power supply module, where in normal operations mode one valve control unit is an active valve control unit and the other is a standby valve control unit, where the optical signal of an active unit energizes the gate control device and provides semiconductor device controlling data, a semiconductor device control module and a reliability control module that performs selection of active valve control unit. | 07-24-2014 |
Roland Siljeström, Grangesberg SE
Patent application number | Description | Published |
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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 |
20130009491 | SWITCHING MODULE FOR USE IN A DEVICE TO LIMIT AND/OR BREAK THE CURRENT OF A POWER TRANSMISSION OR DISTRIBUTION LINE - A switching module, intended to be used in a medium or high voltage DC breaker or a DC current limiter, includes at least one power semiconductor switching element, a gate unit arranged to turn the at least one power semiconductor switching element on and off, respectively, according to a switching control signal, and an energy storage capacitor arranged to provide power to a power supply input of the gate unit. The switching module further includes a power transformation device arranged to receive an optical power signal, to transform the optical power signal into an electrical power signal and to provide the electrical power signal to the energy storage capacitor. | 01-10-2013 |
Roland Siljeström, Grängesberg SE
Patent application number | Description | Published |
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20130200859 | CAPACITOR DISCHARGE IN A CELL BASED VOLTAGE SOURCE CONVERTER - A method and a device to discharge cell capacitors in a cell based voltage source converter. Each cell has switching elements in half bridge or full bridge configuration and a capacitor in parallel to the half or full bridge. Each cell has two terminals, whereof at least one is between two switching elements. The converter has AC and DC terminals, with the possibility to connect each of the terminals to ground, via a further switching element. A resistor is implemented into at least one of the ground connections. To discharge to capacitors, the switching elements in the respective cells are configured such, that the capacitor is in parallel connection to the terminals. The capacitors are thus discharged via the resistor to ground. | 08-08-2013 |
Roland Siljeström, Grängesberg SE
Patent application number | Description | Published |
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20130009491 | SWITCHING MODULE FOR USE IN A DEVICE TO LIMIT AND/OR BREAK THE CURRENT OF A POWER TRANSMISSION OR DISTRIBUTION LINE - A switching module, intended to be used in a medium or high voltage DC breaker or a DC current limiter, includes at least one power semiconductor switching element, a gate unit arranged to turn the at least one power semiconductor switching element on and off, respectively, according to a switching control signal, and an energy storage capacitor arranged to provide power to a power supply input of the gate unit. The switching module further includes a power transformation device arranged to receive an optical power signal, to transform the optical power signal into an electrical power signal and to provide the electrical power signal to the energy storage capacitor. | 01-10-2013 |
20130200859 | CAPACITOR DISCHARGE IN A CELL BASED VOLTAGE SOURCE CONVERTER - A method and a device to discharge cell capacitors in a cell based voltage source converter. Each cell has switching elements in half bridge or full bridge configuration and a capacitor in parallel to the half or full bridge. Each cell has two terminals, whereof at least one is between two switching elements. The converter has AC and DC terminals, with the possibility to connect each of the terminals to ground, via a further switching element. A resistor is implemented into at least one of the ground connections. To discharge to capacitors, the switching elements in the respective cells are configured such, that the capacitor is in parallel connection to the terminals. The capacitors are thus discharged via the resistor to ground. | 08-08-2013 |
Roland Siljeström, Skultuna SE
Patent application number | Description | Published |
---|---|---|
20140203847 | RELIABILITY IN SEMICONDUCTOR DEVICE CONTROL - A gate control device for a semiconductor device includes at least one power supply module, at least one optical communication interface for receiving optical signals from two valve control units and converting them to electric signals for supply to a corresponding power supply module, where in normal operations mode one valve control unit is an active valve control unit and the other is a standby valve control unit, where the optical signal of an active unit energizes the gate control device and provides semiconductor device controlling data, a semiconductor device control module and a reliability control module that performs selection of active valve control unit. | 07-24-2014 |