Abstract: An electromechanical braking system. The force required for the braking process is provided by an asynchronous machine. The asynchronous machine and the torque delivered by the asynchronous machine is adjusted using a quasi-stationary rotor position for the rotor of the asynchronous machine.

Abstract: A testing apparatus for testing electrical components and/or conductor track structures. The testing apparatus includes: a multiplicity of testing locations, each receiving an electrical component and/or a conductor track structure; a selection device for selecting one of the testing locations; electrical lines disposed in rows and electrical lines disposed in columns for the supply of an alternating voltage to the component or structure, situated at the selected testing location; Z diodes for the electrical connection of the respective component and/or structure at the respective testing location via one of the Z diodes to one of the rows of electrical lines; a signal generator developed to generate a test signal that has a voltage signal as the sum of a square wave signal and a wave-shaped signal; and an electromigration device for applying a direct voltage signal to the components and/or structures to bring about electromigration in the components and/or structures.

Abstract: A method for determining wear in an electronic unit, in particular a power electronics unit, which includes at least one electronic component, in particular a semiconductor component, capacitor or the like. The unit is subjected to a test procedure in which at least two predefinable electrical load cycles are applied to the unit, in which cycles the unit is operated in each case in order to simulate at least one selected operating mode for a predefined period of time. During the test procedure, electromagnetic waves generated by the unit by an electrical load resulting from the application of the at least two load cycles to the unit are detected for at least two of the load cycles, and the detected electromagnetic waves of the at least two load cycles are compared with one another in order to detect wear in the unit.

Abstract: A method is provided for controlling a driving dynamics control unit for influencing the braking of wheels of a motor vehicle. The driving dynamics control device having a pump, which includes at least two pump elements for the supply of brake fluid, and an electric motor, which includes a rotor and a stator for driving the pump elements. The method includes the following steps: detecting the position of the rotor relative to the stator, and adjusting an ideal position of the rotor relative to the stator, the sum of the torques for moving the pump elements lying below a predefined torque limit value, in particular being minimal, in the ideal position.

Abstract: A method for operating an electric motor, in particular of a piston pump. The electric motor has a rotor shaft and is actuated with a target rotational speed and a target rotational direction for the rotor shaft as a function of a power demand, wherein an actual rotational speed of the rotor shaft is monitored. In the method, the target rotational direction is changed for a specified period of time if the actual rotational speed is equal to zero and the target rotational speed is unequal to zero, and the electric motor is then actuated again at the target rotational speed and in the target rotational direction.

Abstract: A control unit for operating an electrical machine which includes a rotor, a stator, and power electronics. The power electronics have a plurality of switching elements, by which the phases of the stator winding are connected/connectible electrically to an electrical energy store. The control unit includes first and second processing units and is configured to determine control signals for controlling the switching elements, using the processing units. The first processing unit is configured to determine a magnitude of a setpoint voltage vector for the phases based on a setpoint rotational speed of the rotor and an actual rotational speed of the rotor. The second processing unit is connected to the first processing unit so as to be able to communicate with it, and being configured to determine the control signals as a function of the magnitude of the setpoint voltage vector and an actual angle of rotation of the rotor.

Abstract: A method for actuating a valve with an electromagnetic valve drive through which electric current is conducted to open or close the valve or to hold the valve in an open or closed position includes receiving an opening signal, determining an adapted opening signal which is adapted to physical limits of the valve or valve drive, and determining a feed-forward signal for feed-forward control of an electric current to drive the electromagnetic valve drive to open the valve in reaction to the adapted opening signal. The method further includes calculating an actuation signal for actuating the valve drive using the feed-forward signal, and outputting the actuation signal.

Abstract: A testing apparatus for testing electrical components and/or conductor track structures. The testing apparatus includes: a multiplicity of testing locations, each receiving an electrical component and/or a conductor track structure; a selection device for selecting one of the testing locations; electrical lines disposed in rows and electrical lines disposed in columns for the supply of an alternating voltage to the component or structure, situated at the selected testing location; Z diodes for the electrical connection of the respective component and/or structure at the respective testing location via one of the Z diodes to one of the rows of electrical lines; a signal generator developed to generate a test signal that has a voltage signal as the sum of a square wave signal and a wave-shaped signal; and an electromigration device for applying a direct voltage signal to the components and/or structures to bring about electromigration in the components and/or structures.

Abstract: A control unit for operating an electrical machine which includes a rotor, a stator, and power electronics. The power electronics have a plurality of switching elements, by which the phases of the stator winding are connected/connectible electrically to an electrical energy store. The control unit includes first and second processing units and is configured to determine control signals for controlling the switching elements, using the processing units. The first processing unit is configured to determine a magnitude of a setpoint voltage vector for the phases based on a setpoint rotational speed of the rotor and an actual rotational speed of the rotor. The second processing unit is connected to the first processing unit so as to be able to communicate with it, and being configured to determine the control signals as a function of the magnitude of the setpoint voltage vector and an actual angle of rotation of the rotor.

Abstract: In a hydraulic brake system, which includes: a hydraulic pump which is driven by an electric motor and has the purpose of generating a fluid volume flow for the hydraulic brake system; a hydraulic connection for conducting the fluid volume flow between the hydraulic pump and a wheel brake; a reservoir for storing a fluid volume; wherein the reservoir is connected to the hydraulic connection by means of a switching valve, a method includes actuating the switching valve in such a way that by this means a fluid pulsation in the hydraulic connection is counteracted. Furthermore, the method may be implemented with a control unit and a hydraulic brake system.

Abstract: In a method for controlling a hydraulic braking system, wherein the braking system includes a hydraulic pump that is driven by an electric motor so as to generate a volume of fluid flow for the hydraulic braking system. the electric motor is controlled in such a manner that fluid pulsation in the hydraulic braking system is counteracted by means of modulating a rotational speed of the electric motor. The modulation is generated by means of the control procedure. Furthermore, a device is designed and configured so as to perform the method.

Abstract: In a hydraulic brake system, which includes: a hydraulic pump which is driven by an electric motor and has the purpose of generating a fluid volume flow for the hydraulic brake system; and a solenoid valve for controlling the fluid volume flow from the hydraulic pump to a wheel brake, a method includes actuating the solenoid valve in such a way that by this means a fluid pulsation at the wheel brake is counteracted. Furthermore, the method may be implemented in a corresponding device.

Abstract: A method for actuating a valve with an electromagnetic valve drive through which electric current is conducted to open or close the valve or to hold the valve in an open or closed position includes receiving an opening signal, determining an adapted opening signal which is adapted to physical limits of the valve or valve drive, and determining a feed-forward signal for feed-forward control of an electric current to drive the electromagnetic valve drive to open the valve in reaction to the adapted opening signal. The method further includes calculating an actuation signal for actuating the valve drive using the feed-forward signal, and outputting the actuation signal.

Abstract: A method is provided for controlling a driving dynamics control unit for influencing the braking of wheels of a motor vehicle. The driving dynamics control device having a pump, which includes at least two pump elements for the supply of brake fluid, and an electric motor, which includes a rotor and a stator for driving the pump elements. The method includes the following steps: detecting the position of the rotor relative to the stator, and adjusting an ideal position of the rotor relative to the stator, the sum of the torques for moving the pump elements lying below a predefined torque limit value, in particular being minimal, in the ideal position.

Abstract: In a hydraulic brake system, which includes: a hydraulic pump which is driven by an electric motor and has the purpose of generating a fluid volume flow for the hydraulic brake system; a hydraulic connection for conducting the fluid volume flow between the hydraulic pump and a wheel brake; a reservoir for storing a fluid volume; wherein the reservoir is connected to the hydraulic connection by means of a switching valve, a method includes actuating the switching valve in such a way that by this means a fluid pulsation in the hydraulic connection is counteracted. Furthermore, the method may be implemented with a control unit and a hydraulic brake system.

Abstract: In a hydraulic brake system, which includes: a hydraulic pump which is driven by an electric motor and has the purpose of generating a fluid volume flow for the hydraulic brake system; and a solenoid valve for controlling the fluid volume flow from the hydraulic pump to a wheel brake, a method includes actuating the solenoid valve in such a way that by this means a fluid pulsation at the wheel brake is counteracted. Furthermore, the method may be implemented in a corresponding device.

Abstract: In a method for controlling a hydraulic braking system, wherein the braking system includes a hydraulic pump that is driven by an electric motor so as to generate a volume of fluid flow for the hydraulic braking system. the electric motor is controlled in such a manner that fluid pulsation in the hydraulic braking system is counteracted by means of modulating a rotational speed of the electric motor. The modulation is generated by means of the control procedure. Furthermore, a device is designed and configured so as to perform the method.

Abstract: A method and a device for controlling an electric motor using pulse-width modulated control signals. Control pulses having a setpoint duty factor and temporally varying pulse widths and pulse spacing are generated in the process, the temporally varying pulse widths and pulse spacing being selected as a function of a load and/or thermal loading of the electric motor and/or its control device.

Abstract: A method and a device for controlling an electric motor using pulse-width modulated control signals. Control pulses having a setpoint duty factor and temporally varying pulse widths and pulse spacing are generated in the process, the temporally varying pulse widths and pulse spacing being selected as a function of a load and/or thermal loading of the electric motor and/or its control device.

Abstract: A method for operating an electric motor connectable via a switching device to a current source and connected in parallel with a freewheeling device, the switching device having control applied to it at a specific activation ratio within each working cycle to establish a desired effective operating voltage of the electric motor, so that in at least one operating mode each working cycle is includes an activation and a freewheeling time period. The freewheeling device has a freewheeling transistor and a freewheeling diode, connected in parallel with the transistor and reverse-biased as to the current source; and control is applied to the freewheeling transistor in the freewheeling time period as follows: identifying the freewheeling voltage dropping across the electric motor; and switching the freewheeling transistor for a specific switching time period if the freewheeling voltage is different from zero, particularly less than zero. Also described is an electric motor device.