An actuating device of a pump of a fuel pumping system of an engine, including a motor, a generator, an inverter, a switching member and a control member, the motor including a first rotor coupled to the pump and a first stator including at least one input stator winding, the generator including a second rotor coupled to a drive shaft of the engine, and a second stator including at least one output stator winding, the control member being configured to control the switching member in order to selectively connect each input stator winding: to a corresponding output stator winding if a speed of the engine is higher than or equal to a predetermined speed; to a corresponding output of the inverter, otherwise.

A method of synchronizing a generator (3) with a power supply grid (4) having a grid frequency including the following steps: f) mechanically driving the generator (3) by means of an internal combustion engine (2), in particular a gas engine, creating a generator rotary speed corresponding to a generator frequency generated by the generator (3) at the prevailing generator rotary speed, g) closed-loop or open-loop control of the internal combustion engine (2) such that the generator frequency is in a tolerance range, wherein the grid frequency is within the tolerance range, h) detecting a phase angle difference between a current generated by the generator (3) and/or a voltage generated by the generator (3) on the one hand and a grid current and/or a grid voltage on the other hand, i) synchronizing the voltage generated by the generator (3) and/or the current generated by the generator (3) on the one hand with the grid voltage and/or the grid current on the other hand by the phase angle difference (Δφ) being reduced, in particular minimized, and j) electrically connecting the generator (3) to the power supply grid (4), wherein at least one temporary change in an ignition timing of at least one cylinder unit (9) of the internal combustion engine (2) is performed to reduce the phase angle difference (Δφ).

A system may include a variable frequency independent speed (VFIS) motor-generator. The system may further include a first power conditioner coupled to a set of stator windings of the VFIS motor-generator and a second power conditioner, distinct from the first power conditioner, coupled to a set of primary windings of a high-frequency transformer, where a set of secondary windings of the high-frequency transformer are coupled to a set of rotor windings of the VFIS motor-generator. A method may include providing a first power signal at the set of stator windings. The method may further include generating a second power signal at the second power conditioner for driving the set of rotor windings, where a shaft speed of the VFIS motor-generator is based on a difference between a first frequency of the first power signal and a second frequency of the second power signal.

A system may include a variable frequency independent speed (VFIS) motor-generator. The system may further include a first power conditioner coupled to a set of stator windings of the VFIS motor-generator and a second power conditioner, distinct from the first power conditioner, coupled to a set of primary windings of a high-frequency transformer, where a set of secondary windings of the high-frequency transformer are coupled to a set of rotor windings of the VFIS motor-generator. A method may include providing a first power signal at the set of stator windings. The method may further include generating a second power signal at the second power conditioner for driving the set of rotor windings, where a shaft speed of the VFIS motor-generator is based on a difference between a first frequency of the first power signal and a second frequency of the second power signal.

A VSCF generator system includes a generator and electronics configured to control operations of the generator and a housing. The system also includes a power converter connected to the generator that receives AC current from the generator and converts it to DC current, the power converter including: an output filter that includes a filter capacitor; a sensor assembly that measures a voltage across the filter capacitor; and a controller that receives the measured voltage across the filter capacitor and creates an estimate of a current through the filter capacitor based on the filter capacitor. The estimate is based on a frequency domain representation of the filter capacitor as an ideal differentiator being passed through a bandpass filter with a center frequency equal to the operating frequency of the VSCF generator system and the controller controls operation of the generator portion based on the estimate of current through the filter capacitor.

A VSCF generator system includes a generator and electronics configured to control operations of the generator and a housing. The system also includes a power converter connected to the generator that receives AC current from the generator and converts it to DC current, the power converter including: an output filter that includes a filter capacitor; a sensor assembly that measures a voltage across the filter capacitor; and a controller that receives the measured voltage across the filter capacitor and creates an estimate of a current through the filter capacitor based on the filter capacitor. The estimate is based on a frequency domain representation of the filter capacitor as an ideal differentiator being passed through a bandpass filter with a center frequency equal to the operating frequency of the VSCF generator system and the controller controls operation of the generator portion based on the estimate of current through the filter capacitor.

A power supply system includes: a synchronous generator connected to a three-phase power distribution system that is connected to a consumer load; an inverter that is connected to the power distribution system, supplies power to the consumer load, and compensates for unbalanced current of the synchronous generator; and a control device that generates a gate command for controlling the inverter. The control device: generates, based on a three-phase voltage and current output from the inverter, a target output voltage which is an amplitude of a vector in a complex plane combining voltages of three phases, and a target output phase which is a phase of the vector in the complex plane combining the voltages of three phases; generates a first compensation voltage, based on a current negative-phase-sequence component relating to the synchronous generator; and generates a gate command from the generated values.

A method for feeding electrical power into a three phase electrical power supply network at a network connection point, in particular by means of a wind power installation, using an inverter, comprising the following steps: detecting an electrical network voltage, in particular at the network connection point, determining a virtual generator voltage using a machine model that emulates a behavior of a synchronous machine, preparing the detected network voltage for comparison with the virtual genera-tor voltage, predefining a setpoint current as predefinition for an infeed current as a function of the virtual generator voltage and as a function of the network voltage prepared for comparison, and generating the infeed current depending on the setpoint current and feeding the generated infeed current at the network connection point into the electrical power supply network, wherein preparing the detected network voltage for comparison with the virtual generator voltage comprises transforming the detected network voltage into a space vector representation.

A method of predicting a health status of an integrated drive generator (IDG) includes determining an effective deviation across a plurality of IDG output frequencies for a given IDG operation period. The method includes correlating the effective deviation to an IDG capability to determine a health of the IDG. A system for predicting a health status of an integrated drive generator (IDG) includes an IDG and a generator control unit (GCU) operatively connected to the IDG to determine a plurality of IDG output frequencies for a given IDG operation period. The system includes a central processing unit (CPU) operatively connected to the GCU to receive the IDG output frequencies therefrom. The CPU is configured and adapted to determine an effective deviation across at least some of the plurality of IDG output frequencies for the given IDG operation period, and correlate the effective deviation to an IDG capability to determine a health of the IDG.

A method of predicting a health status of an integrated drive generator (IDG) includes determining an effective deviation across a plurality of IDG output frequencies for a given IDG operation period. The method includes correlating the effective deviation to an IDG capability to determine a health of the IDG. A system for predicting a health status of an integrated drive generator (IDG) includes an IDG and a generator control unit (GCU) operatively connected to the IDG to determine a plurality of IDG output frequencies for a given IDG operation period. The system includes a central processing unit (CPU) operatively connected to the GCU to receive the IDG output frequencies therefrom. The CPU is configured and adapted to determine an effective deviation across at least some of the plurality of IDG output frequencies for the given IDG operation period, and correlate the effective deviation to an IDG capability to determine a health of the IDG.