A device, system, and method for providing electrical power to an electrically isolated region utilizing an electrically insulating drive shaft to transmit rotational energy over an electrically isolated gap to an electrical generator disposed in the electrically isolated region. Electrical power generated by the generator is used to power at least one electronic device in the electrically isolated region or to charge a battery, while maintaining electrical isolation.

A magnetically de-coupled, separately controlled, electric machine assembly including a radial and one or more axial electric machines, each with rotors mechanically coupled to and arranged to directly drive a single shaft. Each of the electric machines are independently, but cooperatively, controlled by two (or more) inverters respectively. The axial and radial electric machines are contained in a single housing.

A magnetically de-coupled, separately controlled, electric machine assembly including a radial and one or more axial electric machines, each with rotors mechanically coupled to and arranged to directly drive a single shaft. Each of the electric machines are independently, but cooperatively, controlled by two (or more) inverters respectively. The axial and radial electric machines are contained in a single housing.

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.

A homopolar DC electromagnetic transmission (HET) and an application system thereof are provided. The HET includes two rotors, a stator, an external auxiliary system and an adjustment control system. Each of the rotors has one or more axisymmetric rotor magnetic conductors, and the stator has one or more direct current magnet exciting coils wound around an axis of a rotation shaft. A main magnetic circuit is guided to be a closed ring. The HET includes at least two main magnetic circuits. The HET includes a closed main current loop. The loop is connected with all the rotor magnetic conductors, a rotor electric conductor, a dynamic/static circuit connecting medium, stator conductors and stator magnetic conductors in series or in series and parallel. A direction of main current on the rotor magnetic conductors is perpendicular to a direction of magnetic flux (ϕ) on meridian plane.

A homopolar DC electromagnetic transmission (HET) and an application system thereof are provided. The HET includes two rotors, a stator, an external auxiliary system and an adjustment control system. Each of the rotors has one or more axisymmetric rotor magnetic conductors, and the stator has one or more direct current magnet exciting coils wound around an axis of a rotation shaft. A main magnetic circuit is guided to be a closed ring. The HET includes at least two main magnetic circuits. The HET includes a closed main current loop. The loop is connected with all the rotor magnetic conductors, a rotor electric conductor, a dynamic/static circuit connecting medium, stator conductors and stator magnetic conductors in series or in series and parallel. A direction of main current on the rotor magnetic conductors is perpendicular to a direction of magnetic flux (ϕ) on meridian plane.

A dual actuated power pack (300) comprises a battery (104) and first (101) and second (102) electric motors, as well as a power generator (103). The first electric motor (101) is powered by the battery (104) and the second electric motor (102) by a grid (106). The first and second electric motors (101, 102) are mechanically coupled (108) with each other so that when said second electric motor (102) is powered, said second electric motor (102) actuates (109) said power generator (103) and said first electric motor (101) at the same time, whereupon the first electric motor (101) functions as a hi-power battery charger and recharge the battery (104) when said second electric motor (102) actuates (109) the power generator (103). When the second electric motor is not used, the first electric motor (101) is powered (104, 105), and the power generator (103) is actuated (108) by said first electric motor (101).

A dual actuated power pack (300) comprises a battery (104) and first (101) and second (102) electric motors, as well as a power generator (103). The first electric motor (101) is powered by the battery (104) and the second electric motor (102) by a grid (106). The first and second electric motors (101, 102) are mechanically coupled (108) with each other so that when said second electric motor (102) is powered, said second electric motor (102) actuates (109) said power generator (103) and said first electric motor (101) at the same time, whereupon the first electric motor (101) functions as a hi-power battery charger and recharge the battery (104) when said second electric motor (102) actuates (109) the power generator (103). When the second electric motor is not used, the first electric motor (101) is powered (104, 105), and the power generator (103) is actuated (108) by said first electric motor (101).

A combination starter-generator device for a work vehicle includes an electric machine and a bi-directional gear set. The gear set is configured to receive rotational input from the electric machine and from the engine and to couple the electric machine and the engine in a first power flow direction and a second power flow direction. In the first power flow direction the gear set effects a first gear ratio, and in the second power flow direction the gear set effects a second gear ratio. In the first power flow direction, the gear set receives input power from the electric machine in a first clock direction and outputs power to the engine in a second clock direction opposite the first clock direction. In the second power flow direction, input power from the engine is in the second clock direction and output power to the electric machine is in the second clock direction.