Patents by Inventor Jochen Kurfiss
Jochen Kurfiss 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: 11316439Abstract: An inverter has at least three phases for supplying current to an electrical machine. The inverter also has a control unit and at least one power output stage connected to the control unit on an input side. The control unit is configured to generate pulse-width-modulated control signals for activating the power output stage. The inverter further has a heat sink and, for each phase, an intermediate circuit capacitor and a semiconductor switch half bridge. The heat sink has a flat thermal contact surface. The thermal contact surface is connected in a thermally conductive manner to the control unit and to the semiconductor switch half bridges. The heat sink has a recess for each of the intermediate circuit capacitors, and the intermediate circuit capacitors are each arranged in one of the recesses in the heat sink.Type: GrantFiled: December 13, 2018Date of Patent: April 26, 2022Assignee: Robert Bosch GmbHInventors: Stephan Binhack, Jochen Kurfiss
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Patent number: 11223314Abstract: An electric machine, in particular an electric motor and/or generator, has a stator and a rotor which is designed to be permanently magnetic or to be energized in particular. The machine has at least two sub-machines. Each of the sub-machines has the same number of phases. The machine has a power output stage for each sub-machine, and the machine also has at least one control unit which is connected to the power output stages. The control unit is designed to generate a pulse width-modulated signal for actuating the power output stages. The control unit is designed to generate the PWM signal for the sub-machines such that an ascending or descending side of a PWM pulse for one sub-machine, said side representing a switching time in each case, and a pulse center of a PWM pulse for another sub-machine of the sub-machines are delayed relative to each other.Type: GrantFiled: June 14, 2018Date of Patent: January 11, 2022Assignee: Robert Bosch GmbHInventors: Jochen Kurfiss, Ulrich Vollmer
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Patent number: 11196376Abstract: An electric machine has at least two sub-machines, each having the same number of phases and being designed to generate a magnetic rotary field independently of one another to rotate the rotor. The machine has a power output stage for each sub-machine, each being designed to energize the sub-machines independently of one another. The machine also has at least one or only one control unit which is connected to the power output stages and is designed to generate a PWM signal in order to actuate the power output stages. The control unit is designed to generate the PWM signal for the sub-machines such that each of the PWM pulses for a sub-machine begins at a starting time of a PWM period and/or to generate the PWM pulses for another sub-machine such that each of the PWM pulses ends at an end time of the PWM period for the other sub-machine.Type: GrantFiled: June 7, 2018Date of Patent: December 7, 2021Assignee: Robert Bosch GmbHInventors: Jochen Kurfiss, Ulrich Vollmer
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Publication number: 20200328692Abstract: An inverter has at least three phases for supplying current to an electrical machine. The inverter also has a control unit and at least one power output stage connected to the control unit on an input side. The control unit is configured to generate pulse-width-modulated control signals for activating the power output stage. The inverter further has a heat sink and, for each phase, an intermediate circuit capacitor and a semiconductor switch half bridge. The heat sink has a flat thermal contact surface. The thermal contact surface is connected in a thermally conductive manner to the control unit and to the semiconductor switch half bridges. The heat sink has a recess for each of the intermediate circuit capacitors, and the intermediate circuit capacitors are each arranged in one of the recesses in the heat sink.Type: ApplicationFiled: December 13, 2018Publication date: October 15, 2020Inventors: Stephan Binhack, Jochen Kurfiss
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Publication number: 20200136548Abstract: An electric machine, in particular an electric motor and/or generator, has a stator and a rotor which is designed to be permanently magnetic or to be energized in particular. The machine has at least two sub-machines. Each of the sub-machines has the same number of phases. The machine has a power output stage for each sub-machine, and the machine also has at least one control unit which is connected to the power output stages. The control unit is designed to generate a pulse width-modulated signal for actuating the power output stages. The control unit is designed to generate the PWM signal for the sub-machines such that an ascending or descending side of a PWM pulse for one sub-machine, said side representing a switching time in each case, and a pulse center of a PWM pulse for another sub-machine of the sub-machines are delayed relative to each other.Type: ApplicationFiled: June 14, 2018Publication date: April 30, 2020Inventors: Jochen Kurfiss, Ulrich Vollmer
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Publication number: 20200136547Abstract: An electric machine has at least two sub-machines, each having the same number of phases and being designed to generate a magnetic rotary field independently of one another to rotate the rotor. The machine has a power output stage for each sub-machine, each being designed to energize the sub-machines independently of one another. The machine also has at least one or only one control unit which is connected to the power output stages and is designed to generate a PWM signal in order to actuate the power output stages. The control unit is designed to generate the PWM signal for the sub-machines such that each of the PWM pulses for a sub-machine begins at a starting time of a PWM period and/or to generate the PWM pulses for another sub-machine such that each of the PWM pulses ends at an end time of the PWM period for the other sub-machine.Type: ApplicationFiled: June 7, 2018Publication date: April 30, 2020Inventors: Jochen Kurfiss, Ulrich Vollmer
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Patent number: 10186997Abstract: The invention relates to an overvoltage arrester for an electrical drive, especially a drive for a motor vehicle. The overvoltage arrester is designed to be connected to an on-board power supply system of a motor vehicle. The overvoltage arrester is designed to reduce any overvoltage produced in the on-board power supply system when a load is switched off. According to the invention, the overvoltage arrester is connected to a control unit for an electronically commutated electrical machine. The overvoltage arrester has an input for an on-board power supply system and is designed to detect when a pre-determined voltage value is exceeded and to produce an overvoltage signal depending on whether the voltage value is exceeded. The control unit is designed to transfer the electrical machine from an operating mode in which the machine generates power to an at least partial power-loss mode or to a mode in which it operates as a motor.Type: GrantFiled: January 3, 2013Date of Patent: January 22, 2019Assignee: Robert Bosch GmbHInventors: Jochen Kurfiss, Egon Gaber, Marc Eschenhagen
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Patent number: 9496800Abstract: A method for activating a rectifier having active switching elements in the event of a load dump, the active switching elements being activated during the voltage clamping in such a way that the clamp voltage in at least one switching branch complies with a signal form predefined as a function of time within at least one half-period of the current to be rectified.Type: GrantFiled: January 2, 2012Date of Patent: November 15, 2016Assignee: ROBERT BOSCH GMBHInventors: Paul Mehringer, Uwe Schiller, Holger Heinisch, Markus Baur, Jochen Kurfiss, Gerhard Walter
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Patent number: 8994318Abstract: An electrical on-board network of a vehicle, having at least two power circuits and an electrical machine allocated to a drive of the vehicle. The electrical machine has at least two phase systems, connected to a respective inverter, and that at least one of the phase systems is capable of being electrically connected to at least one of the power circuits via the associated inverter. A method for operating an electrical on-board network of a vehicle is also described.Type: GrantFiled: January 20, 2011Date of Patent: March 31, 2015Assignee: Robert Bosch GmbHInventors: Jochen Kurfiss, Sven Finke
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Publication number: 20140375238Abstract: The invention relates to an overvoltage arrester for an electrical drive, especially a drive for a motor vehicle. The overvoltage arrester is designed to be connected to an on-board power supply system of a motor vehicle. The overvoltage arrester is designed to reduce any overvoltage produced in the on-board power supply system when a load is switched off. According to the invention, the overvoltage arrester is connected to a control unit for an electronically commutated electrical machine. The overvoltage arrester has an input for an on-board power supply system and is designed to detect when a pre-determined voltage value is exceeded and to produce an overvoltage signal depending on whether the voltage value is exceeded. The control unit is designed to transfer the electrical machine from an operating mode in which the machine generates power to an at least partial power-loss mode or to a mode in which it operates as a motor.Type: ApplicationFiled: January 26, 2012Publication date: December 25, 2014Inventors: Jochen Kurfiss, Egon Gaber, Marc Eschenhagen
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Publication number: 20140104908Abstract: A method for activating a rectifier having active switching elements in the event of a load dump, the active switching elements being activated during the voltage clamping in such a way that the clamp voltage in at least one switching branch complies with a signal form predefined as a function of time within at least one half-period of the current to be rectified.Type: ApplicationFiled: January 2, 2012Publication date: April 17, 2014Inventors: Paul Mehringer, Uwe Schiller, Holger Heinisch, Markus Baur, Jochen Kurfiss, Gerhard Walter
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Patent number: 8421394Abstract: The invention relates to a method for current measurement in an in particular multiphase electrical system, in which an electrical load is energized as desired by at least one circuit element and a control unit produces drive signals which act on the at least one circuit element in order to achieve the desired energization of the load. The invention provides that clock patterns of the drive signals are associated with measurement windows for current measurement, in particular for measuring phase currents, and clock patterns are temporally offset in order to obtain measurement windows with a sufficient temporal length. A minimum temporal shift is the sum of a minimum dead time of the circuit element, a minimum settling time of the measuring amplifier circuit, and a minimum sampling time of the analogue-to-digital converter. The invention furthermore provides that the clock patterns are selected taking into consideration a phase selection for the current measurement.Type: GrantFiled: September 20, 2007Date of Patent: April 16, 2013Assignee: Robert Bosch GmbHInventors: Gilles Schmitt, Sven Finke, Jochen Kurfiss
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Publication number: 20130049650Abstract: An electrical on-board network of a vehicle, having at least two power circuits and an electrical machine allocated to a drive of the vehicle. The electrical machine has at least two phase systems, connected to a respective inverter, and that at least one of the phase systems is capable of being electrically connected to at least one of the power circuits via the associated inverter. A method for operating an electrical on-board network of a vehicle is also described.Type: ApplicationFiled: January 20, 2011Publication date: February 28, 2013Inventors: Jochen Kurfiss, Sven Finke
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Publication number: 20100072980Abstract: The invention relates to a method for current measurement in an in particular multiphase electrical system, in which an electrical load is energized as desired by at least one circuit element and a control unit produces drive signals which act on the at least one circuit element in order to achieve the desired energization of the load. The invention provides that clock patterns of the drive signals are associated with measurement windows for current measurement, in particular for measuring phase currents, and clock patterns are temporally offset in order to obtain measurement windows with a sufficient temporal length. A minimum temporal shift is the sum of a minimum dead time of the circuit element, a minimum settling time of the measuring amplifier circuit, and a minimum sampling time of the analogue-to-digital converter. The invention furthermore provides that the clock patterns are selected taking into consideration a phase selection for the current measurement.Type: ApplicationFiled: September 20, 2007Publication date: March 25, 2010Inventors: Gilles Schmitt, Sven Finke, Jochen Kurfiss