Exhaust gases from an engine, input to turbo-compounder, drive a bladed turbine rotor therein, which drives a multi-phase AC generator, the output of which is used to electrically drive a multi-phase induction motor, the rotor of which is mechanically coupled to the engine, so as to provide for recovering power to the engine. The multi-phase AC generator may be coupled to the engine either by closure of a contactor, engagement of an electrically-controlled clutch, or by control of either a solid-state switching or control system or an AC excitation signal, when the frequency (f.sub.GENERATOR) of the multi-phase AC generator meets or exceeds that (f.sub.MOTOR) of the multi-phase induction motor.

Exhaust gases from an engine, input to turbo-compounder, drive a bladed turbine rotor therein, which drives a multi-phase AC generator, the output of which is used to electrically drive a multi-phase induction motor, the rotor of which is mechanically coupled to the engine, so as to provide for recovering power to the engine. The multi-phase AC generator may be coupled to the engine either by closure of a contactor, engagement of an electrically-controlled clutch, or by control of either a solid-state switching or control system or an AC excitation signal, when the frequency (f.sub.GENERATOR) of the multi-phase AC generator meets or exceeds that (f.sub.MOTOR) of the multi-phase induction motor.

There is provided a system including a dual rotor electrical machine. The dual rotor electrical machine comprises a stator, an inner rotor including a first number of permanent magnet pole pairs, and a modulator including a second number of modulating segments. The system includes a controller configured to execute non-transitory machine readable instructions that, when executed by the controller, cause the system to determine a virtual position of an electromagnetic field of the stator based on a weighted sum of an angular position of the inner rotor and an angular position of the modulator, wherein weights in the weighted sum are based on the first number and the second number.

A rotary electric system includes a rotary electric device that includes: a stator including a stator winding; and a rotor. The stator winding includes: a first coil group that generates a rotating magnetic field to rotate the rotor; and a second coil group that generates power with induced electromotive force due to rotation of the rotor.

A rotary electric system includes a rotary electric device that includes: a stator including a stator winding; and a rotor. The stator winding includes: a first coil group that generates a rotating magnetic field to rotate the rotor; and a second coil group that generates power with induced electromotive force due to rotation of the rotor.

Systems and methods for operating a vehicle that includes an engine and an integrated starter/generator are described. In one example, a torque output of an electric machine is increased via a rotation ratio changing device to reduce engine noise and vibration during engine starting. After the engine is started, the rotation ratio changing device is adjusted so that the engine and the electric machine rotate at a same speed.

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.

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.

Apparatuses, systems, and methods of use for a generator is disclosed. In one embodiment, the generator comprises a stator and a rotor and a first plurality of magnets coupled to the rotor and a second plurality of magnets coupled to the stator. An external magnetic housing may be coupled to an input shaft of the generator or surround the generator itself. A first layer of magnets produce a rotating magnetic field and a second layer of magnets create a static magnetic field, whether such magnets are in the generator itself or within an external magnetic housing. The disclosed generator increases the mechanical power inputted into the generator, which then produces an increased output of the generator.

Apparatuses, systems, and methods of use for a generator is disclosed. In one embodiment, the generator comprises a stator and a rotor and a first plurality of magnets coupled to the rotor and a second plurality of magnets coupled to the stator. An external magnetic housing may be coupled to an input shaft of the generator or surround the generator itself. A first layer of magnets produce a rotating magnetic field and a second layer of magnets create a static magnetic field, whether such magnets are in the generator itself or within an external magnetic housing. The disclosed generator increases the mechanical power inputted into the generator, which then produces an increased output of the generator.