Abstract: A multiphase DC chopper converts an input voltage of an input capacitor into an output voltage of an output capacitor. The multiphase DC chopper has a plurality N of DC choppers connected in parallel between the input capacitor and the output capacitor in which case the nth DC chopper, with n?[1, . . . , N], providing on its output side an nth charge current for charging the output capacitor. A regulation device, which in each case regulates a phase difference signal of two charge currents, which sequentially charge the output capacitor to a value of 360°/N.

Abstract: The energy required for equilibrating the charges of at least two cells in series in an energy storage device is introduced by way of a first charge path via an alternating voltage bus to the cell with the lowest cell voltage (UZX). The alternating voltage bus is supplied with power from an energy storage device by way of a DC converter and an AC converter. A second charge path can alternatively connect the DC converter connector which is connected to the AC converter, to a series circuit of several cells, in particular, all cells of the energy storage device.

Abstract: A device and a method for compensating charges of serially connected individual cells of an energy storage device includes a DC/DC converter which taps power from the energy storage device or an additional energy source, charges a capacitor of an intermediate circuit by way of the tapped power, inverts the voltage thereof in a DC/AC converter, converts the alternating voltage into an intermittent direct current via an AC bus and a double capacitor by way of a rectifier, and charges the cell with the intermittent direct current at the lowest cell voltage.

Abstract: A DC chopper features a setting device, which sets a required current value signal being dependent on a filtered input voltage such that an oscillation of the input filter device and an oscillation of the current are phase-opposed. The DC chopper may further have a control device, which, depending on the input voltage, supplies a control signal and adds the control signal to the actual current value signal supplied to form a controlled actual current value signal. The DC chopper may optionally have a disconnection device, which receives a switch-off signal on the input side and, depending on the switch-off signal received, supplies a ramp disconnection signal, and an adding node which adds the actual current value signal to the ramp disconnection signal to form an elevated actual current value signal.

Abstract: A control device for piezo actuators of fuel injection valves includes a DC/DC up converter and an output stage configured as a SEPIC converter having a second transistor and a coupling capacitor connected in series on the input end. The DC/DC up converter is configured as a flyback converter having a transformer whose one connection of its secondary winding is connected to the connecting node of the second transistor and the coupling capacitor and whose other connection of its secondary winding is connected to the other connection of the coupling capacitor via a diode.

Abstract: A device and method for equalizing the charges of series-connected individual cells of an energy storage device with a DC/DC converter, which draws energy from the energy storage device or from another energy source, charges an intermediate circuit capacitor whose voltage is inverted in a DC/AC converter, converts the alternating voltage via AC bus lines and coupling transformers by way of a rectifier into a pulsating direct current, and charges the cell having the lowest cell voltage with the pulsating direct current.

Abstract: A device and a method for balancing charge between individual cells of a double-layer capacitor, in particular in a multi-voltage motor vehicle electrical system. Each individual cell of the double-layer capacitor is associated with a capacitor, the first terminal of which can be connected via a first switch to a first terminal of the associated cell and via a second switch to a second terminal of the associated cell, and the second terminal of which is connected to the second terminals of all of the capacitors.

Abstract: A current source includes a first switching element configured to adjust an output current according to a control signal received at a control input. The current source also includes a reference resistance, which is electrically coupled to the first switching element such that the output current flows through the reference resistance. The latter includes first and second individual reference resistors, connected in series, and a diode connected in parallel to the first reference resistor. The first reference resistor has a higher impedance than the second reference resistor. A controller receives a predetermined reference potential and an actuating signal that constitutes the control signal of the first switching element.

Abstract: To simplify reliable detection of operating faults in a control unit for operating an electrical component (for example, a fuel injector), an end stage is provided on the output side and is provided with a first line section and a second line section for supplying current in a synchronized manner to an electrical consumer which can be connected to the two line sections via an external line pair. A detection coil configuration is provided for detecting operating faults on the basis of an evaluation of a current that is induced at the detection coil configuration. The detection coil configuration is flowed through by a magnetic flux that is composed of magnetic flow components which are caused by the current flows in the two line sections, and wherein mutual compensation of the magnetic flow components is provided in a normal mode.

Abstract: A device and a method equalize a charge of series-connected individual cells of an energy accumulator with a DC/DC converter. The DC/DC converter draws energy from the energy accumulator or from another power source for charging an intermediate circuit capacitor whose voltage is inverted in a DC/AC converter and the alternating voltage is converted into an intermittent direct current by a rectifier via an AC bus and a coupling element. A switch is placed between the AC bus and each cell thereby enabling the cell to be coupled to the AC bus or disconnected therefrom.

Abstract: A device for controlling at least one piezoactuator for an injection valve of an internal combustion engine, including a microcontroller that controls an output stage which generates the load current for charging and discharging the piezoactuator. The microcontroller controls the output stage through an integrated circuit. A discharge circuit interacts with the integrated circuit to reliably discharge the piezoactuator in case of a failure of the output stage and/or of a safety path of the microcontroller. The load current during the discharge is controlled by a control circuit having a controller which is part of the integrated circuit. The discharge circuit has emergency discharge elements that are activated in case of a failure of the controller or of the integrated circuit.

Abstract: A capacitive load is controlled by charging and respectively discharging by way of a load current, which is allowed to oscillate between a maximum default and a minimum default. The maximum default increases monotonously in a first step, remains essentially constant in a second step, and decreases monotonously in a third step during a charging process. The minimum default decreases monotonously in a first step, remains essentially constant in a second step, and increases monotonously in a third step during a discharging process. A variable temporal overlap of the third step of the charging process and the first step of the subsequent discharging process is provided to set a required degree of charging. This results in a high level of resolution and reproducibility of the control.

Abstract: High efficiency and low losses may be achieved in a circuit arrangement, for charging and discharging at least one capacitive load, in particular, a piezoactuator. The charging and discharging is achieved by way of ring-around processes in a resonant circuit, brought about by controlled opening and closing of at least one first switch and at least one second switch. A controller is provided to control the switches, based on at least one measured signal that is supplied to the controller. A capacitance and the switches are arranged such that the voltage drop across the capacitance is representative of the voltage drop across at least one of the switches. The capacitance has a current measuring resistance wired in series and the controller is provided with the voltage drop across the measuring resistance as measured signal.

Abstract: The invention relates to a circuit configuration (1) for controlling the operation of a half-bridge (13) by pulse-width modulation, especially in a synchronous rectifier mode. Said circuit configuration comprises a first terminal connection (23, 25) for electrically connecting the circuit configuration (1) to an insulated gate terminal of a bridge valve (15, 17) of the half-bridge (13), a second terminal connection (20, 22) for electrically connecting the circuit configuration (1) to an additional terminal of the bridge valve (15, 17), a lead (16, 18) electrically connecting the first terminal connection (23, 25) to the second terminal connection (20, 22), and an electric valve (43, 45) that can be switched on and off by pulse-width modulated signals. Said electric valve (43, 45) is disposed in the lead (16, 18) so that a flow of current through the lead (16, 18) can be released and blocked.

Abstract: A device and a method are provided for equalizing the charge of the capacitors belonging to a double layer capacitor. The device includes an individual transformer associated with each individual capacitor and a flyback transformer or a spool, from which the energy is transferred, via the individual transformers, to the individual transformer, by the respective low charge. Conclusions on the state of the double layer capacitor and the charge-equalizing switch are derived from the measured charging time and discharging time of the flyback transformer.

Abstract: A control device for piezo actuators of fuel injection valves includes a DC/DC up converter and an output stage configured as a SEPIC converter having a second transistor and a coupling capacitor connected in series on the input end. The DC/DC up converter is configured as a flyback converter having a transformer whose one connection of its secondary winding is connected to the connecting node of the second transistor and the coupling capacitor and whose other connection of its secondary winding is connected to the other connection of the coupling capacitor via a diode.

Abstract: A device and a method are provided for equalizing the charge of the capacitors belonging to a double layer capacitor. The device includes an individual transformer associated with each individual capacitor and a flyback transformer or a spool, from which the energy is transferred, via the individual transformers, to the individual transformer, by the respective low charge. Conclusions on the state of the double layer capacitor and the charge-equalizing switch are derived from the measured charging time and discharging time of the flyback transformer.

Abstract: The invention relates to a circuit configuration (1) for controlling the operation of a half-bridge (13) by pulse-width modulation, especially in a synchronous rectifier mode. Said circuit configuration comprises a first terminal connection (23, 25) for electrically connecting the circuit configuration (1) to an insulated gate terminal of a bridge valve (15, 17) of the half-bridge (13), a second terminal connection (20, 22) for electrically connecting the circuit configuration (1) to an additional terminal of the bridge valve (15, 17), a lead (16, 18) electrically connecting the first terminal connection (23, 25) to the second terminal connection (20, 22), and an electric valve (43, 45) that can be switched on and off by pulse-width modulated signals. Said electric valve (43, 45) is disposed in the lead (16, 18) so that a flow of current through the lead (16, 18) can be released and blocked.

Abstract: A DC chopper features a setting device, which sets a required current value signal being dependent on a filtered input voltage such that an oscillation of the input filter device and an oscillation of the current are phase-opposed. The DC chopper may further have a control device, which, depending on the input voltage, supplies a control signal and adds the control signal to the actual current value signal supplied to form a controlled actual current value signal. The DC chopper may optionally have a disconnection device, which receives a switch-off signal on the input side and, depending on the switch-off signal received, supplies a ramp disconnection signal, and an adding node which adds the actual current value signal to the ramp disconnection signal to form an elevated actual current value signal.

Abstract: A multiphase DC chopper converts an input voltage of an input capacitor into an output voltage of an output capacitor. The multiphase DC chopper has a plurality N of DC choppers connected in parallel between the input capacitor and the output capacitor in which case the nth DC chopper, with n?[1, . . . , N], providing on its output side an nth charge current for charging the output capacitor. A regulation device, which in each case regulates a phase difference signal of two charge currents, which sequentially charge the output capacitor to a value of 360°/N.