Aircraft hybrid propulsion fan drive gear system dc motors and generators

An aircraft propulsion system comprising;

• at least two gas turbine engines each including,
• a fan driven by a rotatable fan shaft,
• a fan drive electric motor providing a supplemental drive input to the fan, the fan drive electric motor including a first phase, a second phase and a third phase,
• a gear system driven by an input shaft and coupled to the rotatable fan shaft to provide a difference in relative speeds and provide a main drive input for driving the fan, and
• a generator driven by the input shaft configured to generate electric power for driving the fan drive electric motor,
• wherein the generator includes a first rotor, a first stator, a second stator, a second rotor, a third stator and a third rotor supported on the input shaft, the first rotor, the second rotor and the third rotor include corresponding sets of poles, the fan drive electric motor includes a rotor supported on the rotatable fan shaft with poles clocked relative to a corresponding one of the poles of the generator such that rotation of the input shaft combined with a difference in relative speeds commutates the first phase, the second phase and the third phase to drive the rotor of the fan drive electric motor;
• and
• a controller controlling power output from the generator of each of the at least two gas turbine engines and directing power to at least one fan drive electric motor of the at least two gas turbine engines.

An aircraft propulsion system comprising;

• a fan driven by a rotatable fan shaft;
• a fan drive electric motor providing a supplemental drive input to the fan, the fan drive electric motor including a first phase, a second phase and a third phase;
• a gear system driven by an input shaft and coupled to the rotatable fan shaft to provide a difference in relative speeds and provide a main drive input for driving the fan;
• a generator driven by the input shaft configured to generate electric power for driving the fan drive electric motor, wherein the generator includes a first rotor, a first stator, a second stator, a second rotor, a third stator and a third rotor supported on the input shaft, the first rotor, the second rotor and the third rotor include corresponding sets of poles, the fan drive electric motor includes a rotor supported on the rotatable fan shaft with poles clocked relative to a corresponding one of the poles of the generator such that rotation of the input shaft combined with a difference in relative speeds commutates the first phase, the second phase and the third phase to drive the rotor of the fan drive electric motor.