Abstract: A vehicle or watercraft regeneration system includes at least one electric motor capable of generating electricity and a controller for the at least one motor; wherein the controller to optimize the efficiency of the regeneration. The controller can optimize efficiency by including comprises circuitry for biasing the electric motor during regeneration. Also provided is a regeneration system that further comprises an electricity storage device such as a battery, a capacitor, an electrolysis unit that generates hydrogen from water, and a flywheel. In addition, an efficiency enhancing system for a watercraft or vehicle includes at least one electric motor capable of generating electricity; a controller for the at least one motor; and an electrical connection between the at least one motor and the controller, where in the controller adjust one or more magnetic fields of the electric motor during regeneration to optimize the efficiency of the regeneration.

Abstract: An auxiliary propulsion system for a boat or other marine vessel according to the invention incorporates an electric motor/transmission device for generating locomotive force to propel the boat or vessel, an electrical power supply for providing electrical energy to drive the electric motor/transmission device, at least one electrical energy generating device for generating electrical energy through conversion from one of at least sunlight, wind motion and water motion, a charging circuit having a device for controlling charging of the power supply with electrical energy from the energy generating device, and a device for controlling speed and direction operation of the electric motor/transmission device. In operation, electrical energy is inputted into the electric motor/transmission device from the electrical power supply and locomotive force is thereby generated by the electric motor/transmission device when the primary propulsion system of the boat or other marine vessel is inactive.

Abstract: A multiple input, dual output differential motor transmission device incorporates a sun gear device having first and second sun gears fixedly connected to each other whereby the first and second sun gears rotate together along a common axis of rotation; first and second ring gear devices having first and second ring gears, respectively; and first and second sets of planetary gears. The first set is inter-engaged between the first sun and ring gears, while the second set is inter-engaged between the second sun and ring gears. The first sun and ring gears are concentrically and independently rotatable relative to each other with the first set of planetary gears inter-engaged therebetween. The second sun and ring gears are concentrically and independently rotatable relative to each other with the second set of planetary gears inter-engaged therebetween.