Patents by Inventor Christopher Roemmelmayer
Christopher Roemmelmayer 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: 11867771Abstract: Methods and devices for detecting electrical arcs are provided. A first wavelet transformation with a first mother wavelet is applied to a chronological sequence of current measurements (80) of a current through a lead, to obtain first wavelet coefficients. In addition, a second wavelet transformation with a second mother wavelet different from the first mother wavelet is applied to the chronological sequence in order to obtain second wavelet coefficients. On the basis of the first wavelet coefficients and the second wavelet coefficients, it is then determined whether an arc (10; 11; 24) is present.Type: GrantFiled: January 31, 2022Date of Patent: January 9, 2024Assignee: Infineon Technologies AGInventors: Felix Kaiser, Christoph Grund, Goran Keser, Christopher Roemmelmayer
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Patent number: 11588426Abstract: An apparatus for driving a motor includes motor circuitry and neural network circuitry. The motor circuitry is configured to generate, based on an error compensated rotor angle and current at a plurality of phases of the motor, a d-axis instant current value and generate a d-axis instant voltage value based on the d-axis instant current value. The motor circuitry is further configured to generate voltage at the plurality of phases based on the d-axis instant voltage value. The neural network circuitry is configured to generate a rotor angle offset based on an instant rotor speed at the motor. The neural network circuitry has been trained to generate the rotor angle offset to minimize the d-axis instant voltage value for each of a plurality of rotor speeds at the motor. The error compensated rotor angle is based on the rotor angle offset.Type: GrantFiled: January 17, 2020Date of Patent: February 21, 2023Assignee: Infineon Technologies AGInventors: Christopher Roemmelmayer, Radovan Vuletic
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Publication number: 20220252679Abstract: Methods and devices for detecting electrical arcs are provided. A first wavelet transformation with a first mother wavelet is applied to a chronological sequence of current measurements (80) of a current through a lead, to obtain first wavelet coefficients. In addition, a second wavelet transformation with a second mother wavelet different from the first mother wavelet is applied to the chronological sequence in order to obtain second wavelet coefficients. On the basis of the first wavelet coefficients and the second wavelet coefficients, it is then determined whether an arc (10; 11; 24) is present.Type: ApplicationFiled: January 31, 2022Publication date: August 11, 2022Inventors: Felix Kaiser, Christoph Grund, Goran Keser, Christopher Roemmelmayer
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Publication number: 20210226567Abstract: An apparatus for driving a motor includes motor circuitry and neural network circuitry. The motor circuitry is configured to generate, based on an error compensated rotor angle and current at a plurality of phases of the motor, a d-axis instant current value and generate a d-axis instant voltage value based on the d-axis instant current value. The motor circuitry is further configured to generate voltage at the plurality of phases based on the d-axis instant voltage value. The neural network circuitry is configured to generate a rotor angle offset based on an instant rotor speed at the motor. The neural network circuitry has been trained to generate the rotor angle offset to minimize the d-axis instant voltage value for each of a plurality of rotor speeds at the motor. The error compensated rotor angle is based on the rotor angle offset.Type: ApplicationFiled: January 17, 2020Publication date: July 22, 2021Inventors: Christopher Roemmelmayer, Radovan Vuletic
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Patent number: 10784183Abstract: A semiconductor package includes a semiconductor module, a first package extension frame, a second package extension frame, and a plurality of fasteners. The semiconductor module includes a first side surface, a second side surface, a first major surface, and a second major surface on an opposite side of the semiconductor module from the first major surface. The first package extension frame is configured to attach to the first side surface. The second package extension frame is configured to attach to the second side surface. The plurality of fasteners are configured to mechanically couple the first package extension frame and the second package extension frame to one or more of a circuit board arranged on the first major surface and/or a heat sink arranged on the second major surface.Type: GrantFiled: November 30, 2018Date of Patent: September 22, 2020Assignee: Infineon Technologies AGInventors: Pawan Garg, Mathias Kiele-Dunsche, Tomas Manuel Reiter, Christopher Roemmelmayer
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Patent number: 10742143Abstract: A controller circuit for a brushless direct current (BLDC) motor may be configured to estimate a rotor position of the BLDC motor and apply a constant start-up voltage to a stator winding of the BLDC motor using the estimated rotor position until a current at the stator winding corresponds to a local minimum current. The controller circuit may be further configured to, in response to the current at the stator winding corresponding to the local minimum current, allow commutation of the current at the stator winding, calculate the rotor position in response to allowing the commutation of the current at the stator winding, and commutate the current at the stator winding using the calculated rotor position.Type: GrantFiled: October 17, 2018Date of Patent: August 11, 2020Assignee: Infineon Technologies AGInventors: Christopher Roemmelmayer, Maximilian Burggraf
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Patent number: 10714795Abstract: Techniques for monitoring an internal pressure of a battery cell, whereby a membrane that is part of an outer shell of the battery cell is used as an element of capacitive-based or inductive-based sensor circuitry in order to measure a change of capacitance or inductance under deformation of the membrane from the internal pressure of the battery cell. The change of capacitance or inductance may in turn be used to derive a value for the internal pressure of the battery cell.Type: GrantFiled: May 1, 2017Date of Patent: July 14, 2020Assignee: Infineon Technologies AGInventors: Guenter Schwarzberger, Jens Barrenscheen, Goran Keser, Christopher Roemmelmayer
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Publication number: 20200176351Abstract: A semiconductor package includes a semiconductor module, a first package extension frame, a second package extension frame, and a plurality of fasteners. The semiconductor module includes a first side surface, a second side surface, a first major surface, and a second major surface on an opposite side of the semiconductor module from the first major surface. The first package extension frame is configured to attach to the first side surface. The second package extension frame is configured to attach to the second side surface. The plurality of fasteners are configured to mechanically couple the first package extension frame and the second package extension frame to one or more of a circuit board arranged on the first major surface and/or a heat sink arranged on the second major surface.Type: ApplicationFiled: November 30, 2018Publication date: June 4, 2020Inventors: Pawan Garg, Mathias Kiele-Dunsche, Tomas Manuel Reiter, Christopher Roemmelmayer
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Publication number: 20200127587Abstract: A controller circuit for a brushless direct current (BLDC) motor may be configured to estimate a rotor position of the BLDC motor and apply a constant start-up voltage to a stator winding of the BLDC motor using the estimated rotor position until a current at the stator winding corresponds to a local minimum current. The controller circuit may be further configured to, in response to the current at the stator winding corresponding to the local minimum current, allow commutation of the current at the stator winding, calculate the rotor position in response to allowing the commutation of the current at the stator winding, and commutate the current at the stator winding using the calculated rotor position.Type: ApplicationFiled: October 17, 2018Publication date: April 23, 2020Inventors: Christopher Roemmelmayer, Maximilian Burggraf
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Publication number: 20180316067Abstract: Techniques for monitoring an internal pressure of a battery cell, whereby a membrane that is part of an outer shell of the battery cell is used as an element of capacitive-based or inductive-based sensor circuitry in order to measure a change of capacitance or inductance under deformation of the membrane from the internal pressure of the battery cell. The change of capacitance or inductance may in turn be used to derive a value for the internal pressure of the battery cell.Type: ApplicationFiled: May 1, 2017Publication date: November 1, 2018Inventors: Guenter Schwarzberger, Jens Barrenscheen, Goran Keser, Christopher Roemmelmayer
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Publication number: 20180040926Abstract: Embodiments described herein relate to a battery cells and methods for measuring internal pressure in a battery cell. According to one embodiment, a battery cell includes an interior space, in which a battery electrolyte resides, and a housing that gas-tightly encloses the interior space. The battery cell further includes a gas-tight sealed measurement chamber, which is separated from the interior space by a deformable membrane, in which a pressure sensor is arranged.Type: ApplicationFiled: August 5, 2016Publication date: February 8, 2018Inventors: Goran Keser, Christopher Roemmelmayer, Daniel Gernert