Patents by Inventor Carsten Wittstock
Carsten Wittstock has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8687389Abstract: A device has a converter which is connected to a direct voltage circuit through a short-circuit protection unit. The short-circuit protection unit is arranged at least partially in the direct voltage circuit and is provided in the direct voltage circuit to suppress short-circuit current flowing through the converter. The device contains one or more controllable power semiconductors, wherein a protection element is arranged in parallel to at least one of the controllable power semiconductors. The device prevents the negative effects of a short circuit occurring in the direct voltage network in a particularly reliable manner. For this purpose, the protection element is an energy store.Type: GrantFiled: September 5, 2008Date of Patent: April 1, 2014Assignee: Siemens AktiengesellschaftInventors: Mike Dommaschk, Jörg Dorn, Ingo Euler, Franz Karlecik-Maier, Jörg Lang, Quoc-Buu Tu, Carsten Wittstock, Klaus Würflinger
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Patent number: 8610384Abstract: A device converts electrical energy into heat in the field of drive voltage technology and/or high voltage technology. The device contains a brake resistance and at least one controllable brake power semiconductor for controlling the conversion, enabling a rapid and economical transformation of effective power into heat as required. To this end, the brake resistance contains a plurality of individual brake resistances that are each part of a bipolar submodule. The submodules are connected in series, form a submodule series connection, and at least partially contain an energy accumulator respectively connected in parallel to an associated individual brake resistance and a controllable brake power semiconductor, which allows the current flow over the respectively associated individual brake resistance in a brake position, and interrupts the current flow over the brake resistance in a normal operating position.Type: GrantFiled: August 17, 2009Date of Patent: December 17, 2013Assignee: Siemens AktiengesellschaftInventors: Mike Dommaschk, Ingo Euler, Herbert Gambach, Joerg Lang, Quoc-Buu Tu, Carsten Wittstock, Klaus Wurflinger, Andreas Zenkner
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Patent number: 8351233Abstract: In the method for closed-loop control of at least two converters in an energy transmission and/or distribution system, each rectifier regulator and each inverter regulator provides a differential DC voltage from the difference between a given set DC voltage and the relevant received measured DC voltage, and also provides a differential DC current from a differential DC current from the difference between a set DC current and the corresponding received measured DC current. Each converter is a self-commutated converter with power semiconductors. The rectifier regulation of the provided converter is regulated such that the sum of the product of the differential voltages and the value of given set DC current at the corresponding rectifier and the differential current is a minimum. The inverter regulation regulates the corresponding inverter such that the sum between the differential voltage and the differential current is a minimum.Type: GrantFiled: June 17, 2008Date of Patent: January 8, 2013Assignee: Siemens AktiengesellschaftInventors: Tobias Bernhard, Mike Dommaschk, Jörg Dorn, Ingo Euler, Franz Karlecik-Maier, Jörg Lang, Jürgen Rittiger, John-William Strauss, Quoc-Buu Tu, Oliver Venjakob, Carsten Wittstock, Klaus Würflinger
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Publication number: 20110235375Abstract: A device has a converter which is connected to a direct voltage circuit through a short-circuit protection unit. The short-circuit protection unit is arranged at least partially in the direct voltage circuit and is provided in the direct voltage circuit to suppress short-circuit current flowing through the converter. The device contains one or more controllable power semiconductors, wherein a protection element is arranged in parallel to at least one of the controllable power semiconductors. The device prevents the negative effects of a short circuit occurring in the direct voltage network in a particularly reliable manner. For this purpose, the protection element is an energy store.Type: ApplicationFiled: September 5, 2008Publication date: September 29, 2011Applicant: SIEMENS AKTIENGESELLSCHAFTInventors: Mike Dommaschk, Jörg Dorn, Ingo Euler, Franz Karlecik-Maier, Jörg Lang, Quoc-Buu Tu, Carsten Wittstock, Klaus Würflinger
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Publication number: 20110205771Abstract: A closed-loop control method for at least two converters in an energy transmission and/or distribution system. The converters may be controlled either as rectifier or inverter and they are connected to each other by a DC link. A measured DC voltage and a measured DC current is measured at each converter and transmitted to a rectifier regulator for regulating the corresponding rectifier or to an inverter regulator for regulating the corresponding inverter. Each rectifier regulator and each inverter regulator gives the difference between a given set DC voltage and the relevant received measured DC voltage to give a differential DC voltage and the difference between a set DC current and the corresponding received measured DC current to give a differential DC current.Type: ApplicationFiled: June 17, 2008Publication date: August 25, 2011Applicant: SIEMENS AKTIENGESELLSCHAFTInventors: Tobias Bernhard, Mike Dommaschk, Jörg Dorn, Ingo Euler, Franz Karlecik-Maier, Jörg Lang, Jürgen Rittiger, John-William Strauss, Quoc-Buu Tu, Oliver Venjakob, Carsten Wittstock, Klaus Würflinger
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Publication number: 20110163702Abstract: A device converts electrical energy into heat in the field of drive voltage technology and/or high voltage technology. The device contains a brake resistance and at least one controllable brake power semiconductor for controlling the conversion, enabling a rapid and economical transformation of effective power into heat as required. To this end, the brake resistance contains a plurality of individual brake resistances that are each part of a bipolar submodule. The submodules are connected in series, form a submodule series connection, and at least partially contain an energy accumulator respectively connected in parallel to an associated individual brake resistance and a controllable brake power semiconductor, which allows the current flow over the respectively associated individual brake resistance in a brake position, and interrupts the current flow over the brake resistance in a normal operating position.Type: ApplicationFiled: August 17, 2009Publication date: July 7, 2011Applicant: SIEMENS AKTIENGESELLSCHAFTInventors: Mike Dommaschk, Ingo Euler, Herbert Gambach, Joerg Lang, Quoc-Buu Tu, Carsten Wittstock, Klaus Wurflinger, Andreas Zenkner
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Patent number: 7969238Abstract: A cost-effective device for influencing the transmission of electrical energy of an alternating voltage line with a plurality of phases has phase modules, which each have an alternating voltage terminal for connecting to a phase of the alternating voltage line and two connecting terminals. A phase module branch extends between each connecting terminal and each alternating voltage terminal. The phase module branch is formed of a series connection of sub-modules, each having a power semiconductor circuit and an energy accumulator connected in parallel to the power semiconductor circuit. The connecting terminals are connected to one another. The power semiconductor circuit is equipped with power semiconductors that can be switched off and are connected to each other in a half bridge.Type: GrantFiled: April 2, 2008Date of Patent: June 28, 2011Assignee: Siemens AktiengesellschaftInventors: Tobias Bernhard, Mike Dommaschk, Jörg Dorn, Ingo Euler, Franz Karlecik-Maier, Jörg Lang, John-William Strauss, Quoc-Buu Tu, Carsten Wittstock, Klaus Würflinger
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Publication number: 20100127769Abstract: A cost-effective device for influencing the transmission of electrical energy of an alternating voltage line with a plurality of phases has phase modules, which each have an alternating voltage terminal for connecting to a phase of the alternating voltage line and two connecting terminals. A phase module branch extends between each connecting terminal and each alternating voltage terminal. The phase module branch is formed of a series connection of sub-modules, each having a power semiconductor circuit and an energy accumulator connected in parallel to the power semiconductor circuit. The connecting terminals are connected to one another. The power semiconductor circuit is equipped with power semiconductors that can be switched off and are connected to each other in a half bridge.Type: ApplicationFiled: April 2, 2008Publication date: May 27, 2010Applicant: SIEMENS AKTIENGESELLSCHAFTInventors: Tobias Bernhard, Mike Dommaschk, Jörg Dorn, Ingo Euler, Franz Karlecik-Maier, Jörg Lang, John-William Strauss, Quoc-Buu Tu, Carsten Wittstock, Klaus Würfinger