Abstract: A system for charging an electrical energy store by means of a converter. The converter monitors an electrical connection between the converter and the electrical energy store. If an interruption of the electrical connection between the converter and the electrical energy store is detected, for example, the opening of a circuit breaker between the electrical energy store and the converter, the further provision of electrical power for charging the electrical energy store through is immediately prevented by the converter.

Abstract: The invention relates to charging an electrical energy store by means of a converter. In this case the converter monitors an electrical connection between the converter and the electrical energy store. If an interruption of the electrical connection between the converter and the electrical energy store is detected, for example, the opening of a circuit breaker between the electrical energy store and the converter, the further provision of electrical power for charging the electrical energy store through is immediately prevented by the converter. In this way, dangerous voltage rises on the converter can be avoided.

Abstract: The invention relates to a method and to a device for changing from the idle operating state of an electric motor (5) having three phase terminals (5-1, 5-2, 5-3) to a short-circuit operating state. Thereby significant voltage rises are avoided. For this purpose, after receiving (120) a request for changing of the operating state of the electric motor (5) to the short-circuit operating state, three switching elements (1-1, 1-2, 1-3) are closed. Thereby the switching elements (1-1, 1-2, 1-3) are at least partially closed successively and the times of closing the individual switching elements are predetermined as a function of control parameters of the electric motor.

Abstract: The invention relates to a method and a device for operating a drive train (101) of a hybrid vehicle comprising an electrical system (102), the drive train (101) having at least one vehicle drive wheel (105) in addition to one first electrical machine (104) and the first electrical machine (104) being connected to the electrical system (102). According to the invention, in order to stabilize the voltage of the electrical system (102), the first electrical machine (104) is operated without being coupled to the drive wheels (105) of the hybrid vehicle.

Abstract: The invention relates to a method and to a device for changing from the idle operating state of an electric motor (5) having three phase terminals (5-1, 5-2, 5-3) to a short-circuit operating state. Thereby significant voltage rises are avoided. For this purpose, after receiving (120) a request for changing of the operating state of the electric motor (5) to the short-circuit operating state, three switching elements (1-1, 1-2, 1-3) are closed. Thereby the switching elements (1-1, 1-2, 1-3) are at least partially closed successively and the times of closing the individual switching elements are predetermined as a function of control parameters of the electric motor.

Abstract: The invention relates to a method for operating an electrical machine (1) controlled by an inverter (2), wherein the inverter (2) comprises half-bridge branches (10-U, 10-V, 10-W) having power components in the form of controllable power switching elements (3) and power diodes (4) respectively connected in parallel therewith, wherein each of the half-bridge branches (10-U; 10-V; 10-W) is arranged on a separate semiconductor module (11-U; 11-V; 11-W), which are arranged jointly on a baseplate (12), wherein the phase currents (1_U, 1_V, 1_W) flowing through the half-bridge branches (10-U, 10-V, 10-W), the voltages present at the power components and temperatures (t_Sens_U, t_Sens_V, t_Sens_W) on the semiconductor modules (11-U, 11-V, 11-W) are determined, from the current (1_U; 1_V; 1_W) respectively flowing at a power component and from the voltage respectively present a power loss (P) is calculated for each of the power components, from the power losses (P) a relevant temperature swing (?t; ?t_Sens) is determ

Abstract: A circuit is described for operating an auxiliary unit for starting internal combustion engines via a starter battery. The circuit is configured to receive a state-of-function signal, a state-of-charge signal and/or a state-of-health signal from a battery-management system. The respective signals indicate whether the starter battery is capable of operating the auxiliary unit, what state of charge the starter battery has and whether the starter battery is damaged. The circuit is configured to draw electrical energy from a high-voltage battery, connected to the circuit, when the state-of-function signal indicates that operation of the auxiliary unit by the starter battery is not possible, when the state-of-charge signal indicates that the state of charge of the starter battery is too low to operate the auxiliary unit and/or when the state-of-health signal indicates that the starter battery is damaged.

Abstract: A method for checking the plausibility of a torque of an electric machine, calculated on the basis of a machine model, in which a first value of an electromagnetic power of the electric machine is determined from the calculated torque and a rotational speed of the electric machine. Stator current components and stator phase voltage components are calculated from the stator currents and the stator phase voltages with respect to a reference system, which is fixed in relation to the stator. A second value of the electromagnetic power of the electric machine is determined from the stator current components and the stator phase voltage components. If a deviation of the first value of the electromagnetic power of the electric machine from the second value exceeds a predefined power threshold value, the torque of the electric machine, calculated on the basis of the machine model, is classified as implausible.

Abstract: The invention relates to a method for operating an electrical machine (1) controlled by an inverter (2), wherein the inverter (2) comprises half-bridge branches (10-U, 10-V, 10-W) having power components in the form of controllable power switching elements (3) and power diodes (4) respectively connected in parallel therewith, wherein each of the half-bridge branches (10-U; 10-V; 10-W) is arranged on a separate semiconductor module (11-U; 11-V; 11-W), which are arranged jointly on a baseplate (12), wherein the phase currents (1_U, 1_V, 1_W) flowing through the half-bridge branches (10-U, 10-V, 10-W), the voltages present at the power components and temperatures (t_Sens_U, t Sens_V, t_Sens_W) on the semiconductor modules (11-U, 11-V, 11-W) are determined, from the current (1_U; 1_V; 1_W) respectively flowing at a power component and from the voltage respectively present a power loss (P) is calculated for each of the power components, from the power losses (P) a relevant temperature swing (?t; ?t_Sens) is determ

Abstract: The invention relates to a method and a device for operating a drive train (101) of a hybrid vehicle comprising an electrical system (102), the drive train (101) having at least one vehicle drive wheel (105) in addition to one first electrical machine (104) and the first electrical machine (104) being connected to the electrical system (102). According to the invention, in order to stabilise the voltage of the electrical system (102), the first electrical machine (104) is operated without being coupled to the drive wheels (105) of the hybrid vehicle.

Abstract: A method for checking the plausibility of a torque of an electric machine, calculated on the basis of a machine model, in which a first value of an electromagnetic power of the electric machine is determined from the calculated torque and a rotational speed of the electric machine. Stator current components and stator phase voltage components are calculated from the stator currents and the stator phase voltages with respect to a reference system, which is fixed in relation to the stator. A second value of the electromagnetic power of the electric machine is determined from the stator current components and the stator phase voltage components. If a deviation of the first value of the electromagnetic power of the electric machine from the second value exceeds a predefined power threshold value, the torque of the electric machine, calculated on the basis of the machine model, is classified as implausible.

Abstract: In a method for operating an electric machine of a drive device, which electric machine has a rotor and a stator, and which drive device has a drive unit, an angular position of the rotor with respect to the stator is determined on the basis of an angle-of-rotation encoder associated with the drive unit.

Abstract: A circuit is described for operating an auxiliary unit for starting internal combustion engines via a starter battery. The circuit is configured to receive a state-of-function signal, a state-of-charge signal and/or a state-of-health signal from a battery-management system. The respective signals indicate whether the starter battery is capable of operating the auxiliary unit, what state of charge the starter battery has and whether the starter battery is damaged. The circuit is configured to draw electrical energy from a high-voltage battery, connected to the circuit, when the state-of-function signal indicates that operation of the auxiliary unit by the starter battery is not possible, when the state-of-charge signal indicates that the state of charge of the starter battery is too low to operate the auxiliary unit and/or when the state-of-health signal indicates that the starter battery is damaged.

Abstract: A method for operating a vehicle electrical system of a motor vehicle, the vehicle electrical system having at least two onboard subsystems having different electrical voltages, and a coupling is provided which allows a flow of electrical energy between the onboard subsystems, the one onboard subsystem being connected to a generator and/or at least one electrical consumer, and the other onboard subsystem being connected to at least one electrical consumer. In the event of a fault, the voltage supplied by the generator is lowered to a value that poses no risk to persons, yet an energy flow from the onboard subsystem having the generator to the other onboard subsystem having the consumer taking place nevertheless.

Abstract: A method for operating a hybrid vehicle, which has a first and a second drive unit, in which the second drive unit is started by at least a portion of the operating energy generated by the first drive unit. In order to improve the driving comfort of the hybrid vehicle during the startup of the second drive unit while driving, the second drive unit, which is at rest, is started using kinetic energy obtained from a driving movement of the hybrid vehicle, while the hybrid vehicle is driven by the first drive unit.

Abstract: A process to start a brushless direct current motor with a multiphase stator winding is disclosed, in which, during rotor standstill, a plurality of current impulses is intruded on the stator winding, the current rise time until a current threshold is reached is measured in the stator winding with every current impulse and the rotor position is derived from the measured current rise times. A more precise determination of rotor position is achieved with lower control-related effort for a regulated sensorless start-up in that a plurality of test current impulses is successively intruded on the stator winding in such a way that the test current impulses generate stator flow vectors offset by the same angular increments over 360° electrically in the stator. The current rise time for each stator flow vector is measured in the total current of the stator winding and the phase position of the stator flow vector with the smallest current rise time is determined as the rotor position.

Abstract: The specification describes a method and a detection module for determining the rotor position of an electromotor having a plurality of motor phase windings, in which, for determining the rotor position, the polarity of at least one motor phase voltages, which is induced in at least one first motor phase winding, is determined as at least one first polarity value, through comparison to a reference value. The reference value is, for example, a real or simulated star-point voltage. In one embodiment of the invention, the determination of the at least one first polarity value is synchronized to switch-on time point for supplying current to the at least one first or second motor phase winding, and in one specific embodiment, at least one first polarity value is determined after a preestablished delay, which follows the switch-on time point.

Abstract: A process to start a brushless direct current motor with a multiphase stator winding is disclosed, in which, during rotor standstill, a plurality of current impulses is intruded on the stator winding, the current rise time until a current threshold is reached is measured in the stator winding with every current impulse and the rotor position is derived from the measured current rise times. A more precise determination of rotor position is achieved with lower control-related effort for a regulated sensorless start-up in that a plurality of test current impulses is successively intruded on the stator winding in such a way that the test current impulses generate stator flow vectors offset by the same angular increments over 360° electrically in the stator. The current rise time for each stator flow vector is measured in the total current of the stator winding and the phase position of the stator flow vector with the smallest current rise time is determined as the rotor position.

Abstract: The invention relates to a pump (10), having a pump head (12), which has a pump chamber (11), and having an electric motor (14), which drives the pump head (12) and has a stator (40) and a rotor (38), the rotor (38) being connected to the pump head (12) and being disposed in a rotor chamber (82) open toward the pump chamber (11).

Abstract: The invention is directed to a method and an arrangement for controlling a motor vehicle having an integrated electric machine which generates electric as well as mechanical power. In the context of a hierarchal control structure having several logic components, the electric machine is allocated as a component “electric drive” to the component “drive” with respect to its function for generating mechanical power and as a component “generator” to the component “vehicle electric drive” with respect to its function for generating electric power.