Abstract: Various embodiments include a method for operating a bidirectional voltage converter with an input-side half-bridge, an output-side half-bridge, and a bridge branch having a bridge inductance, comprising: determining an actual mean bridge current value flowing through the bridge branch during a respective subsequent switching cycle T1 of the transistor switches in a respective current switching cycle T0; determining switch-on time points and switch-on durations of the respective transistor switches for the respective subsequent switching cycle T1; and switching on the respective transistor switches at the respective ascertained switch-on time points and for the respective ascertained switch-on durations in the respective subsequent switching cycle T1.

Abstract: A vehicle electrical system is equipped with an inverter, an electrical energy store, an electrical machine and an AC transmission terminal. The inverter has a first and a second side and is configured to transmit power between these sides. The first side of the inverter is connected to the energy store via input current terminals of the inverter. The second side of the inverter is connected to the electrical machine via phase current terminals of the inverter. The inverter has at least two H-bridges. Each of the H-bridges bypasses the two sides of the inverter. The AC transmission terminal is connected to the second side of the inverter.

Abstract: Various embodiments include a method for operating a bidirectional voltage converter with an input-side half-bridge, an output-side half-bridge, and a bridge branch having a bridge inductance, comprising: determining an actual mean bridge current value flowing through the bridge branch during a respective subsequent switching cycle T1 of the transistor switches in a respective current switching cycle T0; determining switch-on time points and switch-on durations of the respective transistor switches for the respective subsequent switching cycle T1; and switching on the respective transistor switches at the respective ascertained switch-on time points and for the respective ascertained switch-on durations in the respective subsequent switching cycle T1.

Abstract: The vehicle electrical system described includes an inverter, an electrical energy store, an electrical machine and a DC transmission terminal. The inverter is connected to the energy store via input current terminals. At least two phase current terminals of the inverter are connected to the electrical machine. The inverter has at least two H-bridges. The DC transmission terminal has a positive rail connected to at least one of the phase current terminals.

Abstract: A vehicle electrical system is equipped with an inverter, an electrical energy store, an electrical machine and an AC transmission terminal. The inverter has a first and a second side and is configured to transmit power between these sides. The first side of the inverter is connected to the energy store via input current terminals of the inverter. The second side of the inverter is connected to the electrical machine via phase current terminals of the inverter. The inverter has at least two H-bridges. Each of the H-bridges bypasses the two sides of the inverter. The AC transmission terminal is connected to the second side of the inverter.

Abstract: The vehicle electrical system described includes an inverter, an electrical energy store, an electrical machine and a DC transmission terminal. The inverter is connected to the energy store via input current terminals. At least two phase current terminals of the inverter are connected to the electrical machine. The inverter has at least two H-bridges. The DC transmission terminal has a positive rail connected to at least one of the phase current terminals.

Abstract: An apparatus for detecting the state of a checkable storage battery in a vehicle having at least two vehicle onboard power supply systems of different operating voltages is provided. The vehicle onboard power supply systems are coupled by a DC/DC converter, which converts a first DC voltage of a first vehicle onboard power supply system into a second DC voltage of the storage battery in the second vehicle onboard power supply system. The vehicle onboard power supply systems have a control device that includes a test signal module configured to supply a test signal via the DC/DC converter to the checkable storage battery, a measured value detection module configured to measure the reaction values of the checkable storage battery, and an evaluation module configured to detect the state of the storage battery from the measured reaction values.

Abstract: An apparatus for detecting the state of a checkable storage battery in a vehicle having at least two vehicle onboard power supply systems of different operating voltages is provided. The vehicle onboard power supply systems are coupled by a DC/DC converter, which converts a first DC voltage of a first vehicle onboard power supply system into a second DC voltage of the storage battery in the second vehicle onboard power supply system. The vehicle onboard power supply systems have a control device that includes a test signal module configured to supply a test signal via the DC/DC converter to the checkable storage battery, a measured value detection module configured to measure the reaction values of the checkable storage battery, and an evaluation module configured to detect the state of the storage battery from the measured reaction values.

Abstract: An assembly and a method determine the angular position of a rotating machine by way of an inductive sensor. From the excitation signal for a primary winding of a sensor and voltages induced in the two secondary windings of the sensor, three more signals are derived using phase shifters and polarity sign determination units. The six signals in total are sampled using a sample and hold sampling unit and provided to a processor for evaluation, which then calculates the current angular position of the rotating machine at the sampling time.

Abstract: An assembly and a method determine the angular position of a rotating machine by way of an inductive sensor. From the excitation signal for a primary winding of a sensor and voltages induced in the two secondary windings of the sensor, three more signals are derived using phase shifters and polarity sign determination units. The six signals in total are sampled using a sample and hold sampling unit and provided to a processor for evaluation, which then calculates the current angular position of the rotating machine at the sampling time.

Abstract: With a measuring device (1) for determining a voltage of at least one battery cell (14) in a battery (15), it is provided in order to achieve a precise, highly accurate measurement, that a voltage which is applied to an integration circuit (2) is integrated up and in a first and a second comparator circuit (4, 5) is compared with a first and a second comparator threshold value. The time span between the emission of a first and a second switching value is measured using a measuring and evaluation unit (6). In addition, a reference voltage source (3) is provided in order to specify a reference voltage. Due to the fact that in two integration procedures in sequence, a voltage which comprises the reference voltage and a voltage which comprises the voltage of a battery cell (14) to be determined is integrated up, the unknown voltage of the battery cell (14) can be precisely determined by comparing the two integration procedures.

Abstract: A cooling fan, in particular a radiator fan for a motor vehicle, includes an electronically commutated electric motor and an electronics casing (21) with an electronic control for controlling the electric motor. The outer surface of the electronics casing (21) has cooling fins (25), the free ends of which project into the cold air flow produced by the impeller (9) of the fan. The free ends (27) of the cooling fins (25) projecting into the cold air flow have air diverting elements through which a part of the predominantly axial cold air flow produced by the impeller (9) is diverted in a radial direction relative to the impeller (9) and then in the longitudinal direction of other ends (29) of the cooling fins (25) arranged on the surface of the electronics casing (21). This provides effective cooling of the electronics casing.

Abstract: The invention describes a method that makes it possible to correct a nonlinear relationship between the electrical phase angle and the mechanical output angle of stepper motors, using a low-resolution encoder or the like. The method of the invention makes a compromise between the conventional closed-loop control of stepper motors, which requires high resolution of angular detection, and a purely static correction of the characteristic curve. The result is a substantial improvement in synchronization, for instance when conventional claw pole stepper motors are used, as a pointer drive for a gauge in a motor vehicle. The microstep triggering is done with a corrected sinusoidal form; for the correction, coefficients that are evaluated by means of a simplified Fourier synthesis are essentially used.