Patents by Inventor Stefan Schroeder
Stefan Schroeder 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: 10108895Abstract: An operator control system includes switches, RFID transponders, and a RFID reader. Each switch has a cap support and a switch cap. The switch caps are respectively interchangeably attachable to the cap supports. The RFID transponders are respectively attached to the switch caps. Each RFID transponder stores a respective piece of information identifying a respective control function so that the switch cap to which the RFID transponder is attached is associated with the respective control function. The RFID reader is arranged on at least one of the switches for reading the piece of information of at least one of the RFID transponders.Type: GrantFiled: September 22, 2017Date of Patent: October 23, 2018Assignee: Leopold Kostal GmbH & Co. KGInventors: Oliver Maier, Stefan Schroeder, Christian Schirp
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Patent number: 10103576Abstract: A method and system for a control power supply system is provided. The control power supply system includes a first conductor configured to carry a direct current (DC) electrical current from a source to a load, a second conductor configured to carry the DC electrical current from the load to the source, and an AC power source coupled to at least one of the first and the second conductors, the AC power source configured to superimpose a selectable relatively high frequency AC component onto the DC electrical current to generate a composite power signal.Type: GrantFiled: August 19, 2016Date of Patent: October 16, 2018Assignee: GENERAL ELECTRIC COMPANYInventors: Stefan Schroeder, Christof Martin Sihler, Sebastian Pedro Rosado
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Publication number: 20180287487Abstract: The present disclosure relates to a snubber circuit which comprises a static snubber unit, connected in parallel with the switch, for balancing a static voltage sharing across a switch when the switch is in a state of turn-on or turn-off; and a dynamic snubber unit for balance a dynamic voltage sharing across the switch when the switch is in a process of turn-on or turn-off, comprising a dynamic voltage sharing capacitor connected in parallel with the switch and having a relationship between a capacitance and a voltage of the dynamic voltage sharing capacitor; and a controller for controlling the capacitance of the dynamic voltage sharing capacitor to be in a predetermined working area of capacitance rising while the voltage across the switch is increasing. The present disclosure also relates to a power semiconductor device.Type: ApplicationFiled: February 23, 2018Publication date: October 4, 2018Inventors: Saijun Mao, Stefan Schroeder, Jingkui Shi, He Xu, Marius Michael Mechlinski, Bo Qu, Zhihui Yuan, Yingqi Zhang, Jie Shen
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Patent number: 10073512Abstract: A power converter includes primary and secondary bridges, a transformer, and a controller configured to generate a switching mode map that correlates each of a plurality of switching modes to a respective set of value ranges of system parameters of the power converter. The sets of system parameter value ranges are contiguous and non-overlapping across the switching mode map, each of the plurality of switching modes includes gate trigger voltage timings for commuting at least one of the primary and secondary bridges. The controller is configured to obtain a plurality of measured system parameter values, select from the switching mode map one of the plurality of switching modes that correlates to the set of system parameter values containing the plurality of measured system parameter values, and adjust gate trigger voltage timings of at least one of the primary and secondary bridges, according to the selected switching mode.Type: GrantFiled: November 19, 2014Date of Patent: September 11, 2018Assignee: General Electric CompanyInventors: Simon Herbert Schramm, Said Farouk Said El-Barbari, Stefan Schroeder, Zhihui Yuan
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Publication number: 20180241297Abstract: A system includes an eddy current brake. The eddy current brake includes a back plate and a first inductor. The first inductor includes a pole coupled to the back plate and a winding disposed about the pole, wherein the winding is configured to conduct an electric current to generate a magnetic field. At least one of the back plate and the pole 104 includes a plurality of laminations.Type: ApplicationFiled: August 10, 2015Publication date: August 23, 2018Inventors: Christoph BOELD, Mikhail Avramovich AVANESOV, Stefan SCHROEDER, Ara PANOSYAN, Herbert SCHAUMBERGER, Uwe LIEBSCHER
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Publication number: 20180210031Abstract: A method for protecting a circuit is provided, wherein the circuit comprises a plurality of switch devices connected in series. The method comprises detecting a failure risk indicator of each switch device; determining whether each switch device has a failure risk based on the corresponding failure risk indicator; and making each of the switch device(s) having the failure risk in a constant on-state to eliminate the failure risk and prevent a failure of the switch device optionally if a number of the switch device(s) which have or had the failure risk is less than or equal to a preset value.Type: ApplicationFiled: January 4, 2018Publication date: July 26, 2018Inventors: Marius Michael MECHLINSKI, Stefan SCHROEDER, Jie SHEN, Fan ZHANG, Zhihui YUAN
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Patent number: 9973946Abstract: A method for protecting a mobile communication network from performance impacts includes determining whether to apply a forwarding functionality or an alternative treatment functionality for downlink data packets directed to the specific IP-address or to the specific range of IP-addresses of the user equipment, wherein the application of the forwarding functionality versus the alternative treatment functionality of the filter element is based on load conditions of the mobile communication network at a reception time of the downlink data packets at the core network; and providing the forwarding functionality or the alternative treatment functionality for the downlink data packets directed to the specific IP-address or to the specific range of IP-addresses of the user equipment.Type: GrantFiled: March 26, 2015Date of Patent: May 15, 2018Assignee: DEUTSCHE TELEKOM AGInventor: Stefan Schroeder
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Patent number: 9970417Abstract: This disclosure relates to systems and methods for controlling a wind converter for a weak electrical grid. In one embodiment of the disclosure, a system for controlling the wind converter includes a wind converter connected to an electrical grid at a point of connection (POC) and operable to transfer a power to the electrical grid. The system includes a first control loop operable to calculate, based on electrical grid parameters and wind converter characteristics, a voltage reference to be generated by the wind converter. The system includes a second control loop to convert, based on the electrical grid parameters, the voltage reference into a current reference. The second loop converts the angle information of the voltage reference into a voltage at the POC. The system includes a third control to regulate, based at least on the current reference, the power transferred by the wind converter to the electrical grid.Type: GrantFiled: April 14, 2016Date of Patent: May 15, 2018Assignee: GENERAL ELECTRIC COMPANYInventors: Zhihui Yuan, Robert Roesner, Stefan Schroeder, Ara Panosyan, Krishna Kumar Anaparthi
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Publication number: 20180025264Abstract: An operator control system includes switches, RFID transponders, and a RFID reader. Each switch has a cap support and a switch cap. The switch caps are respectively interchangeably attachable to the cap supports. The RFID transponders are respectively attached to the switch caps. Each RFID transponder stores a respective piece of information identifying a respective control function so that the switch cap to which the RFID transponder is attached is associated with the respective control function. The RFID reader is arranged on at least one of the switches for reading the piece of information of at least one of the RFID transponders.Type: ApplicationFiled: September 22, 2017Publication date: January 25, 2018Applicant: Leopold Kostal GmbH & Co. KGInventors: Oliver Maier, Stefan Schroeder, Christian Schirp
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Patent number: 9847731Abstract: A converter assembly and method are provided. The converter assembly includes a galvanic isolation device, first switching devices, and second switching devices. The switching devices are conductively coupled with each other and with opposite sides of the isolation device. The first switching devices control conduction of an input voltage, and the second switching devices control conduction of electric power. The first switching devices are configured to switch between an open state and a closed state at frequencies that are faster than frequencies at which the second switching devices switch between the open state and the closed state to control a shape of a waveform of the electric power.Type: GrantFiled: July 23, 2015Date of Patent: December 19, 2017Assignee: General Electric CompanyInventors: Farouk Said El-Barbari, Simon Herbert Schramm, Stefan Schroeder, Alvaro Jorge Mari Curbelo
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Patent number: 9825518Abstract: An exemplary power conversion system includes a power conversion device and a control system. The power conversion device converts electrical power from one form to another. The power conversion device includes at least one switching element capable of being turned off to block an electrical current flowing through the at least one switching element. The control system is electrically coupled to the power conversion device for monitoring an electrical current flowing through the at least one switching element and for monitoring at least one parameter in association with the operation of the power conversion system. The control system further generates an over-current threshold value that is variable with respect to at least one monitored parameter.Type: GrantFiled: October 30, 2013Date of Patent: November 21, 2017Assignee: GE ENERGY POWER CONVERSION TECHNOLOGY LTDInventors: Jie Shen, Stefan Schroeder, Kunlun Chen, Laigui Qin
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Publication number: 20170302204Abstract: This disclosure relates to systems and methods for controlling a wind converter for a weak electrical grid. In one embodiment of the disclosure, a system for controlling the wind converter includes a wind converter connected to an electrical grid at a point of connection (POC) and operable to transfer a power to the electrical grid. The system includes a first control loop operable to calculate, based on electrical grid parameters and wind converter characteristics, a voltage reference to be generated by the wind converter. The system includes a second control loop to convert, based on the electrical grid parameters, the voltage reference into a current reference. The second loop converts the angle information of the voltage reference into a voltage at the POC. The system includes a third control to regulate, based at least on the current reference, the power transferred by the wind converter to the electrical grid.Type: ApplicationFiled: April 14, 2016Publication date: October 19, 2017Inventors: Zhihui Yuan, Robert Roesner, Stefan Schroeder, Ara Panosyan, Krishna Kumar Anaparthi
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Publication number: 20170294850Abstract: A multilevel converter comprising a first switching branch connected between a positive DC-link terminal and an AC output terminal and comprising series-connected first and second switching elements, a second switching branch connected between the AC output terminal and a negative DC-link terminal and comprising series-connected third and fourth switching elements, a third switching branch connected between a DC-link neutral point and a connection point of the first and the second switching elements, a fourth switching branch connected between the DC-link neutral point and a connection point of the third and the fourth switching elements, the fourth switching branch being completely independent from the third switching branch, and a flying capacitor connected between the connection point of the first and the second switching elements and the connection point of the third and the fourth switching elements.Type: ApplicationFiled: June 27, 2017Publication date: October 12, 2017Inventors: Yong XU, Fan ZHANG, Stefan SCHROEDER
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Publication number: 20170288394Abstract: A system, a switch assembly and an associated method. The system includes a number of switch assemblies, each including a switch module, isolation circuits, a detection unit, and a drive unit. The switch module includes power switch devices connected in parallel. The switch modules are connected in series. The isolation circuits each are connected in series to a gate terminal of at least one corresponding power switch device of the power switch devices. Each isolation circuit includes a capacitor or a controllable switch. The detection unit detects faults in at least one of the power switch devices. The drive unit is coupled to the switch module via the isolation circuits for driving the power switch devices of the corresponding switch module, and when the fault is detected, the drive unit is for turning on the power switch devices parallel connected to the at least one of faulty power switch devices.Type: ApplicationFiled: March 30, 2017Publication date: October 5, 2017Inventors: Zhihui YUAN, He XU, Jie SHEN, Fan ZHANG, Stefan SCHROEDER
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Patent number: 9777966Abstract: A subsea power module includes an outer pressure compensated vessel defining an interior chamber and one or more heat generating electrical components disposed within the interior chamber. The outer pressure compensated vessel is configured to maintain a pressure within the interior chamber substantially the same as an ambient pressure outside the outer pressure compensated vessel. Each of the electrical components may be disposed within an inner chamber of a pressure vessel disposed within the interior chamber of the outer pressure compensated vessel. Each of the one or more heat generating electrical components is configured to transfer heat generated within the interior chamber of the outer pressure compensated vessel through the wall defining the interior chamber to a fluid, such as seawater, surrounding the outer pressure compensated vessel.Type: GrantFiled: January 30, 2014Date of Patent: October 3, 2017Assignee: General Electric CompanyInventors: Mark Aaron Chan Chan, Stefan Schroeder, Piniwan Thiwanka Bandara Wijekoon, Eric Ayres Browne
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Patent number: 9755545Abstract: A power conversion system includes at least one multi-level power converter and a controller coupled to the at least one multi-level power converter. The controller includes a first CMV injection module and a second CMV injection module. The first CMV injection module generates a first CMV signal for modifying at least one voltage command to achieve a first function in association with operation of the power conversion system. The second CMV injection module generates a second CMV signal based at least in part on a three-level CMV limit either for modifying the at least one voltage command or for further modifying the at least one modified voltage command to achieve a second function in association with operation of the power conversion system.Type: GrantFiled: November 21, 2014Date of Patent: September 5, 2017Assignee: General Electric CompanyInventors: Qin Lei, Jie Shen, Stefan Schroeder
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Publication number: 20170250542Abstract: A power distribution system for providing a desired value of voltage regulation is presented. The system includes at least one power source, at least one sink, a distribution feeder configured to couple the at least one power source to the at least one sink. The system includes a plurality of modular voltage regulation units coupled to the distribution feeder, where each of the plurality of modular voltage regulation units includes a transformer including a primary winding having a first end and a second end and a secondary winding having a first end and a second end; and at least one switch coupled to the primary winding of the transformer, where the first end of the secondary winding is coupled to at least one of the first and second ends of the primary winding via the at least one switch. A method of operating a power distribution system is also presented.Type: ApplicationFiled: February 26, 2016Publication date: August 31, 2017Inventors: Ara Panosyan, Piniwan Thiwanka Bandara Wijekoon, Stefan Schroeder, Eva-Maria Baerthlein
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Publication number: 20170126008Abstract: A modular substation (10) for subsea applications includes a plurality of modular DC/AC converters (32) configured for converting DC electrical power transmitted along a DC transmission link (24) into AC electrical power for supplying to a plurality of subsea loads (56). The plurality of modular DC/AC converters (32) is configured to couple in series to the DC transmission link (24) and couple in parallel to an AC distribution network (52). At least a first modular DC/AC converter (32) is configured to be selectively electrically and mechanically disconnected from the DC transmission link (24) and the AC distribution network (52) to facilitate maintenance of the first modular DC/AC converters (32) while the AC distribution network (52) continues to supply AC electrical power to at least one of the plurality of subsea loads (56). The modular substation (10) also comprises protection and bypass circuits (26) intended to isolate faulty DC/AC converters (32) and to facilitate safe maintenance and repair.Type: ApplicationFiled: March 27, 2015Publication date: May 4, 2017Inventors: Jie SHEN, Zhihui YUAN, Christof Martin SIHLER, Stefan SCHROEDER, Mark Aaron CHAN, Fei XU
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Patent number: 9640312Abstract: A common mode choke includes at least two groups of multi-phase coils wound on a magnetic core for balancing differential mode inductance between the phases. The multi-phase coils in each group are series connected and concentrically wound on a respective portion of the magnetic core. Each group of multi-phase coils is non-overlapping with each other group of multi-phase coils.Type: GrantFiled: August 19, 2014Date of Patent: May 2, 2017Assignee: General Electric CompanyInventors: Zhihui Yuan, Xiaoting Dong, Jie Shen, Stefan Schroeder, Konrad Roman Weeber
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Patent number: 9634576Abstract: A power conversion system includes at least one multi-level power converter and a controller coupled to the at least one multi-level power converter. The controller includes a first CMV injection module and a second CMV injection module. The first CMV injection module generates a first CMV signal for modifying at least one voltage command to achieve a first function in association with operation of the power conversion system. The second CMV injection module generates a second CMV signal based at least in part on a local limit either for modifying the at least one voltage command or for further modifying the at least one modified voltage command to achieve a second function in association with operation of the power conversion system.Type: GrantFiled: June 27, 2014Date of Patent: April 25, 2017Assignee: GENERAL ELECTRIC COMPANYInventors: Jie Shen, Stefan Schroeder, Kunlun Chen, Shuitao Yang, Bo Qu, Qin Lei