Abstract: A method for determining a converter Thevenin equivalent model for a converter system, includes: receiving measurement values of a coupling point voltage and a coupling point current measured at a point of common coupling between a grid emulator system and the converter system, wherein the grid emulator system supplies the converter system with a supply voltage; and determining a converter Thevenin impedance and a converter Thevenin voltage source of the converter Thevenin equivalent model by inputting the measurement values of the coupling point voltage and of the coupling point current into a coupled system model, which includes equations modelling the converter system and the grid emulator system and from which the converter Thevenin impedance and a converter Thevenin voltage source are calculated.

Abstract: A method for determining a converter Thevenin equivalent model for a converter system, includes: receiving measurement values of a coupling point voltage and a coupling point current measured at a point of common coupling between a grid emulator system and the converter system, wherein the grid emulator system supplies the converter system with a supply voltage; and determining a converter Thevenin impedance and a converter Thevenin voltage source of the converter Thevenin equivalent model by inputting the measurement values of the coupling point voltage and of the coupling point current into a coupled system model, which includes equations modelling the converter system and the grid emulator system and from which the converter Thevenin impedance and a converter Thevenin voltage source are calculated.

Abstract: A method is provided for connecting a main converter, e.g. for use in a power plant for regenerative energy having a generator, to a power grid. The method includes providing energy from the pre-charge unit to at least one of at least two converter paths. The at least one converter path is pre-charged using the energy provided from the pre-charge unit. At least one further converter path of the at least two converter paths is pre-charged using the energy provided from the pre-charge unit via the at least one converter path through the grid side converter of the at least one converter path and the grid side converter of the at least one further converter path. The main converter is connected to the power grid by closing the grid breaker.

Abstract: A method for eliminating an arc driven by at least one phase voltage source of a converter circuit is disclosed. The converter circuit can include a converter unit and an energy storage circuit, wherein the at least one phase voltage source can be connected on an AC voltage side of the converter unit, and the converter unit can have a plurality of actuable power semiconductor switches. The method can include monitoring a state variable of the converter circuit for a predeterminable threshold value of the state variable to detect an arc, and actuating at least one of the plurality of actuable power semiconductor switches of the converter unit upon detecting a discrepancy between the state variable and the predeterminable threshold value.

Abstract: A method is provided for connecting a main converter, e.g. for use in a power plant for regenerative energy having a generator, to a power grid. The method includes providing energy from the pre-charge unit to at least one of at least two converter paths. The at least one converter path is pre-charged using the energy provided from the pre-charge unit. At least one further converter path of the at least two converter paths is pre-charged using the energy provided from the pre-charge unit via the at least one converter path through the grid side converter of the at least one converter path and the grid side converter of the at least one further converter path. The main converter is connected to the power grid by closing the grid breaker.

Abstract: An exemplary method for operating a converter to supply electrical power to a load includes controlling the converter for a provided overload time so that overload power is applied to the load, and controlling the converter for a provided resting time, so that resting power is applied to the load. The overload power is higher than a nominal power which corresponds to a steady-state operation limit of the converter, wherein the resting power is lower than the nominal power.

Abstract: A method for eliminating an arc driven by at least one phase voltage source of a converter circuit is disclosed. The converter circuit can include a converter unit and an energy storage circuit, wherein the at least one phase voltage source can be connected on an AC voltage side of the converter unit, and the converter unit can have a plurality of actuable power semiconductor switches. The method can include monitoring a state variable of the converter circuit for a predeterminable threshold value of the state variable to detect an arc, and actuating at least one of the plurality of actuable power semiconductor switches of the converter unit upon detecting a discrepancy between the state variable and the predeterminable threshold value.

Abstract: A method and an apparatus are described for determining a field current through a field winding in an electrical machine with a stator and a rotor. The electrical machine includes a field-circuit transformer to produce, by induction of an electrical current on the rotor side, field current with which a field winding is energized in order to generate an excitation magnetic field. The method includes driving the primary side of the field-circuit transformer to produce a field current in the rotor, which is derived from the current induced on the secondary side in the field-circuit transformer; measuring one or more phase currents in one or more primary-side phases of the field-circuit transformer; determining a maximum value depending on the one or more measured phase currents; determining the field current through the field winding depending on the determined maximum value.

Abstract: A method and an apparatus are described for determining a field current through a field winding in an electrical machine with a stator and a rotor. The electrical machine includes a field-circuit transformer to produce, by induction of an electrical current on the rotor side, field current with which a field winding is energized in order to generate an excitation magnetic field. The method includes driving the primary side of the field-circuit transformer to produce a field current in the rotor, which is derived from the current induced on the secondary side in the field-circuit transformer; measuring one or more phase currents in one or more primary-side phases of the field-circuit transformer; determining a maximum value depending on the one or more measured phase currents; determining the field current through the field winding depending on the determined maximum value.

Abstract: A vehicle includes a first structure, a pedal pivotably connected to the first structure for pivoting between rest and fully-applied positions, a control attachment connecting the pedal to a vehicle system to be controlled, a second structure located rearward of the pedal, and an engagement bracket connected to the pedal to engage the second structure upon rearward movement of the pedal during a vehicle frontal collision. The control attachment is connected to the engagement bracket and disengages from the pedal so that the pedal pivots independent of the control system when the engagement bracket strikes the second structure with a predetermined force. There is a constant distance between the engagement bracket and the second structure as the pedal pivots so that the position of the pedal does not affect the disengagement of the control attachment during the frontal collision.

Abstract: A vehicle includes a first structure, a pedal pivotably connected to the first structure for pivoting between rest and fully-applied positions, a control attachment connecting the pedal to a vehicle system to be controlled, a second structure located rearward of the pedal, and an engagement bracket connected to the pedal to engage the second structure upon rearward movement of the pedal during a vehicle frontal collision. The control attachment is connected to the engagement bracket and disengages from the pedal so that the pedal pivots independent of the control system when the engagement bracket strikes the second structure with a predetermined force. There is a constant distance between the engagement bracket and the second structure as the pedal pivots so that the position of the pedal does not affect the disengagement of the control attachment during the frontal collision.

Abstract: An adjustable control pedal includes an upper arm and a lower arm carrying a pedal. The lower arm can be selectively moved relative to the upper arm to adjust the position of the pedal between a forward position and a rearward position. A control pin is operably connected to the upper arm for rotation with the upper arm to supply a control signal when force is applied to the pedal. An adjuster is operably connected to the control pin to adjust the position of the control pin relative to the pivot axis so that a ratio of a distance between the pivot axis and the pedal and a distance between the pivot axis and the control pin remains constant as the pedal is adjusted between the forward position and the rearward position.

Abstract: An adjustable control pedal includes an upper arm and a lower arm carrying a pedal. The lower arm can be selectively moved relative to the upper arm to adjust the position of the pedal between a forward position and a rearward position. A control pin is operably connected to the upper arm for rotation with the upper arm to supply a control signal when force is applied to the pedal. An adjuster is operably connected to the control pin to adjust the position of the control pin relative to the pivot axis so that a ratio of a distance between the pivot axis and the pedal and a distance between the pivot axis and the control pin remains constant as the pedal is adjusted between the forward position and the rearward position.