The present disclosure is directed to an electric generator and motor transmission system that is capable of operating with high energy, wide operating range and extremely variable torque and RPM conditions. In accordance with various embodiments, the disclosed system is operable to: dynamically change the output size of the motor/generator by modularly engaging and disengaging rotor/stator sets as power demands increase or decrease; activate one stator or another within the rotor/stator sets as torque/RPM or amperage/voltage requirements change; and/or change from parallel to series winding configurations or the reverse through sets of 2, 4, 6 or more parallel, three-phase, non-twisted coil windings with switchable separated center tap to efficiently meet torque/RPM or amperage/voltage requirements.

The present disclosure is directed to an electric generator and motor transmission system that is capable of operating with high energy, wide operating range and extremely variable torque and RPM conditions. In accordance with various embodiments, the disclosed system is operable to: dynamically change the output size of the motor/generator by modularly engaging and disengaging rotor/stator sets as power demands increase or decrease; activate one stator or another within the rotor/stator sets as torque/RPM or amperage/voltage requirements change; and/or change from parallel to series winding configurations or the reverse through sets of 2, 4, 6 or more parallel, three-phase, non-twisted coil windings with switchable separated center tap to efficiently meet torque/RPM or amperage/voltage requirements.

A marine propulsion device includes: a propeller; a first power source for rotating the propeller, a second power source for rotating the propeller; a propeller shaft provided with the propeller; a first drive shaft connected to the first power source; a second drive shaft connected to the second power source; a transmission shaft connected to the propeller shaft; and a dog clutch that switches a connection mode of the first drive shaft, the second drive shaft, and the transmission shaft between at least two of: a first mode in which the first drive shaft and the transmission shaft are connected to each other; a second mode in which the second drive shaft and the transmission shaft are connected to each other; and a third mode in which both the first drive shaft and the second drive shaft are connected to the transmission shaft.

A marine propulsion device includes: a propeller; a first power source for rotating the propeller, a second power source for rotating the propeller; a propeller shaft provided with the propeller; a first drive shaft connected to the first power source; a second drive shaft connected to the second power source; a transmission shaft connected to the propeller shaft; and a dog clutch that switches a connection mode of the first drive shaft, the second drive shaft, and the transmission shaft between at least two of: a first mode in which the first drive shaft and the transmission shaft are connected to each other; a second mode in which the second drive shaft and the transmission shaft are connected to each other; and a third mode in which both the first drive shaft and the second drive shaft are connected to the transmission shaft.

A motor/generator/transmission system includes: an axle; a stator ring having a plurality of stator coils disposed around the periphery of the stator ring, wherein each phase of the plurality of stator coils includes a respective set of multiple parallel non-twisted wires separated at the center tap with electronic switches for connecting the parallel non-twisted wires of each phase of the stator coils all in series, all in parallel, or in a combination of series and parallel; a rotor support structure coupled to the axle; a first rotor ring and a second rotor ring each having an axis of rotation coincident with the axis of rotation of the axle, at least one of the first rotor ring or the second rotor ring being slidably coupled to the rotor support structure and configured to translate along the rotor support structure in a first axial direction or in a second axial direction.

A motor/generator/transmission system includes: an axle; a stator ring having a plurality of stator coils disposed around the periphery of the stator ring, wherein each phase of the plurality of stator coils includes a respective set of multiple parallel non-twisted wires separated at the center tap with electronic switches for connecting the parallel non-twisted wires of each phase of the stator coils all in series, all in parallel, or in a combination of series and parallel; a rotor support structure coupled to the axle; a first rotor ring and a second rotor ring each having an axis of rotation coincident with the axis of rotation of the axle, at least one of the first rotor ring or the second rotor ring being slidably coupled to the rotor support structure and configured to translate along the rotor support structure in a first axial direction or in a second axial direction.