A load adaptive linear electrical generator system is provided for generating DC electrical power. The electrical generation system includes one or more power generation modules which will be selectively turned on or off and additively contribute power depending on the DC power demand. Each power generating module includes a pair of linear electrical generators connected to respective ones of a pair of internal combustion piston based power assemblies. The piston in the internal combustion assembly is connected to a magnet in the linear electrical generator. The piston/magnet assembly oscillates in a simple harmonic motion at a frequency dependent on a power load of the electrical generator. A stroke limiter constrains the piston/magnet assembly motion to preset limits.

In an inverter generator having a generator unit including three phase windings driven by an engine, a converter having multiple switching elements and configured to convert alternating current outputted from the generator unit to direct current, an inverter configured to convert direct current outputted from the converter to alternating current and output the alternating current to a load, and a converter control unit configured to determine PWM control ON-time period and drive the multiple switching elements so that inter-terminal voltage of direct current outputted from the converter stays constant with respect to increase/decrease of the load, the converter control unit is configured to detect, with respect to voltage waveforms occurring in the three-phase windings in cycle (t−n), crossing angle between voltage waveform of one phase and voltage waveform of a phase adjacent thereto and to drive the multiple switching elements of either the one phase and the adjacent phase in cycle (t) such that the detected crossing angle is included in the PWM control signal ON-time period.

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 portable electrical generation system includes a generator having a rotor and a plurality of stators to produce a supply of electrical energy, a prime mover operable to drive the rotor, a voltage selector control operably connected to the generator, and a link board assembly configured to removably engage the voltage selector control, the link board assembly including a base board and a plurality of bus bars, the bus bars being arranged to electrically orient the plurality of stators to provide a first power output configuration.

An example system includes a gas-turbine configured to generate mechanical energy using fuel; an electrical generator configured to generate electrical energy using the mechanical energy generated by the gas-turbine; an electrical converter configured to process the electrical energy generated by the electrical generator; and a converter controller configured to reduce, responsive to detecting occurrence of a fault in the electrical generator or the electrical converter, an amount of fuel provided to the gas-turbine.

Methods and systems for operating a hybrid electric aircraft propulsion system mounted to an aircraft. The method comprises driving a first rotating propulsor from a first electric motor operatively connected to a generator, driving a second rotating propulsor from a second electric motor operatively connected to the generator, and driving a third rotating propulsor from a thermal engine, the thermal engine operatively connected to the generator and configured to drive the generator.

Systems and methods for starting a gas turbine engine can comprise a generator to be driven by the gas turbine engine to supply power to a grid system, a first switch to electrically couple and decouple the generator from the grid system, a first static frequency converter having a first capacity, a second static frequency converter having a second capacity, control means for electrically coupling and decoupling the first and second static frequency converters from the grid system, a synchronizer and a controller configured to operate the generator as a starter-motor with power from: the first static frequency converter to turn the gas turbine engine at a first rate sufficient to start the gas turbine engine within a first time period or the first static frequency converter and the second static frequency converter in synchronization to turn the gas turbine engine at a second rate greater than the first rate.

The disclosed embodiments aim to improve upon existing multi stage generators for providing power to a load. In particular, embodiments of the invention include a regulator situated between the output of a pilot exciter and the main exciter of a multi stage generator system, the regulator arranged to limit the voltage available to a field current control element which sets the field current supplied to the main exciter.

A turboelectric generator system includes a gas turbine engine which includes, in fluid flow series, a gas-generator compressor, a combustor, a gas-generator turbine, and a variable-speed free power turbine. The system further comprises a variable-frequency electric machine rotatably connected with the free power turbine and a power converter configured to convert a variable frequency electrical output from the electric machine to a fixed frequency output.

This application provides methods and systems for rapid load support for grid frequency transient events. Example systems may include a turbine having a first controller, a generator coupled to the turbine, where the generator is configured to provide power to an electrical grid, and an exciter configured to provide a magnetic field in the generator. The exciter may include a second controller configured to monitor a first set of electrical properties associated with the electrical grid, determine that a transient event is present on the electrical grid based on the first set of electrical properties, and send a notification of the transient event to the first controller.