An electric power system includes electric energy sources and control equipment for controlling the electric energy sources in accordance with a target value of electric power produced by the electric power system. The control equipment activates and deactivates the electric energy sources based on a control value and on activation and deactivation limits. The control value can be the target value or the actual value of the electric power. The control equipment controls active electric energy sources according to the target value and according to power sharing defined for the active electric energy sources. The activation and deactivation limits as well as activation and deactivation order of the electric energy sources can be determined based on properties of the electric energy sources and on a prevailing operational situation of the electric power system.

A control device for a battery of a marine vessel recovers a power storage amount of a chargeable lithium ion battery while protecting the same. When an acquired power storage amount of the lithium ion battery becomes equal to or less than a first predetermined power storage amount, a switch to connect the lithium ion battery and a line or a load is turned off. While the switch is off, as an electric power balance on the line, a power inflow amount, a first power outflow amount, and a second power outflow amount are acquired. Based on the electric power balance acquired while the switch is off, whether a chargeable condition in which the lithium ion battery is chargeable is satisfied is determined. When the chargeable condition is satisfied, the switch is turned on.

A control device for a battery of a marine vessel recovers a power storage amount of a chargeable lithium ion battery while protecting the same. When an acquired power storage amount of the lithium ion battery becomes equal to or less than a first predetermined power storage amount, a switch to connect the lithium ion battery and a line or a load is turned off. While the switch is off, as an electric power balance on the line, a power inflow amount, a first power outflow amount, and a second power outflow amount are acquired. Based on the electric power balance acquired while the switch is off, whether a chargeable condition in which the lithium ion battery is chargeable is satisfied is determined. When the chargeable condition is satisfied, the switch is turned on.

A marine power supply system includes a battery unit including a first battery to supply power to a starter that starts an engine, and a second battery to supply power to an electric motor, and a power distributor connected to the first battery and the second battery. The power distributor outputs a demand power amount of power required by the first battery to the first battery, and outputs at least a portion of surplus power to the second battery when a total demand power amount required by the battery unit includes the surplus power.

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.

A hybrid propulsion system for a marine vessel is described. The hybrid propulsion system includes a shaft coupled to a propeller, a planetary gear system configured to operate in a first configuration and a second configuration, and a motor-generator. The motor-generator is configured to selectively rotate with and provide torque to the shaft through the planetary gear system in the first configuration and to rotate independently from the shaft in the second configuration. The shaft extends from the propeller through the planetary gear system and the motor-generator to a torque producing device for the marine vessel.

A hybrid propulsion system for a marine vessel is described. The hybrid propulsion system includes a shaft coupled to a propeller, a planetary gear system configured to operate in a first configuration and a second configuration, and a motor-generator. The motor-generator is configured to selectively rotate with and provide torque to the shaft through the planetary gear system in the first configuration and to rotate independently from the shaft in the second configuration. The shaft extends from the propeller through the planetary gear system and the motor-generator to a torque producing device for the marine vessel.

A marine vessel, system, and process provides for reducing or eliminating fuel consumption and emissions of marine vessels. System and method for charging an electricity storage element of an energy storage system of a floating marine vessel may include applying a power source from a marine platform to an electrical power bus of the floating vessel to charge the electricity storage element. A power generator of the marine vessel configured to supply electrical power to the power bus may be configured from an ON state to an OFF state.

A marine propulsion system includes an outboard motor including an outboard motor engine, a propulsion generator to be driven by the outboard motor engine, and an electric starter to start the outboard motor engine. The outboard motor is installed on a hull, and an outboard motor capacitor is provided in the outboard motor to supply to the starter power to start the outboard motor engine. The outboard motor capacitor has a higher output per unit volume than a lead storage battery.