Abstract: The invention relates to a pod propulsion device including a motor casing (3) and a strut (2), which strut (2) is connected at a lower part thereof to the motor casing (3) and is arranged to be connected at an upper part thereof to a hull (1) of a ship. The motor casing (3) includes a housing (6) enclosing an electric motor (5) with a stator and a rotor, which housing (6) has an upper portion. According to the invention a stationary heat conducting means (7) is arranged in contact with said upper portion, which heat conducting means (7) is arranged to conductively connect the upper portion to at least one outer wall (21) of the strut (2). The invention also relates to a ship provided with such pod propulsion device and to a method for cooling a pod propulsion device.

Abstract: 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.

Abstract: Disclosed are a method and a virtual sensor system for determining the speed through water of a marine vessel. The method includes obtaining propeller revolutions per minute and at least one of torque at propeller, propulsion power, thrust and engine fuel flow, obtaining speed over ground or logged data from one or more speed through water logs of the vessel and using the obtained data and hydrodynamic modelling to determine the speed through water of the vessel.

Abstract: 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.

Abstract: A modular electric propulsion device for ships according to an embodiment of the present disclosure may be easily mounted in a ship after removing an existing engine from the ship because a switch board for power distribution, and an inverter and a motor for power conversion are modularized inside a single casing, and may be installed in a minimum space for installation because a distance between motor rotation shafts may be made close to each other even when two modular electric propulsion devices for ships are mounted in a dual installation manner.

Abstract: A drive with integrated dynamic load control includes a three-phase asynchronous motor having three phase legs connected in a star circuit, each phase leg having a winding having a coil end connected to a common star point. A load control circuit has a regulating module, an ammeter, a voltmeter and first and second switches. The ammeter and voltmeter detect a phase current and a phase voltage in one phase leg. The regulating module calculates an active power of the phase leg and a total active power of the motor responsive to the phase current and phase voltage. The switches are arranged in two of the phase legs between the respective coil end and the star point and the regulating module interrupts the two phase legs by using the switches when the active power, the total active power or a torque calculated from the total active power exceeds an adjustable limit value.

Abstract: A system and method for a stand up paddle board that utilizes a vertical hollow protrusion through the paddle board that supports the propulsion system and is comprised of two assemblies; a motor and propeller assembly, and a battery and control assembly, the location of the hollow protrusion mitigating the negative aspects of propelling the board with a propeller and the extra weight of the motorized system on the board's balance and maneuverability characteristics.

Abstract: A drive system mounted to the hull of a buoyant vessel, the drive system having a rectifier, a generator, an AC bus in communication with shore power or a charging system and the rectifier, a DC bus in communication with the rectifier, at least one energy storage system, an inverter, a prime mover, a load regenerating device, and a control and monitor system which has predefined specifications for at least one of: storage units of at least one energy storage system; stored therein and wherein the control and monitor system is adapted to: automatically control the DC/DC converters, relieve a current draw from one or more storage units, provide charging current, and automatically draw power and redirect energy.

Abstract: The present disclosure is directed towards a power distribution system for a marine vessel. The power distribution system comprises auxiliary, first and second buses and first and second propulsors for propelling the marine vessel. A first power generation system is electrically connected to the first bus and operably connected to the first propulsor. A second power generation system is electrically connected to the second bus and operably connected to the second propulsor. The first and second buses are electrically connected to the auxiliary bus such that electrical power is transferable between the first and second power generation systems for driving the first and/or second propulsors.

Abstract: A surfboard with a surfboard body (1) extending along a longitudinal direction (L) and having an upper surface and a bottom surface. An electrical battery pack (2) is removably positioned in an upper compartment accessible from the upper surface. An electrically driven water-jet configured to propel the surfboard is provided with electrical power from the electrical battery pack. The electrically driven water-jet is provided in a propulsion module (3) that is removably positioned in a lower compartment accessible from the lower surface. The upper compartment and the lower compartment partly overlaps each other as seen along the longitudinal direction (L).

Abstract: A lateral marine thruster is disclosed for mounting to an outboard motor. The lateral marine thruster has a bi-directional thruster with a central body portion and at least one propeller, the central body portion housing at least one high torque electric motor, which is rotatably coupled to at least one propeller, the rotational axis of the high torque electric motor and the propeller being oriented perpendicular to the centerline of the outboard motor. The bi-directional thruster is secured to the anti-cavitation plate or a similar mounting location of the outboard motor to provide lateral thrust for ease of docking or mooring a vessel.

Abstract: A system, methods and apparatus for powered monofin that propels a swimmer through water uses one of two modes of power: 1. An electric-assist mode, in which the propulsor responds to a swimmer's kick by multiplying the work of the swimmer; 2. Inverse mode, in which the propulsor deactivates when the swimmer is working. In this mode, propulsion is inversely related to the work of the swimmer. As the swimmer does more work, power from the monofin is reduced, to a predetermined, average level of propulsion. As the swimmer does less work propulsion increases to the predetermined level.

Abstract: The present disclosure relates to the field of outboard engines, particularly to a direct-drive electric outboard engine and an outboard engine system for alleviating the problem of the existing outboard engines, i.e., incapability of simultaneously meeting requirements on rev and torque of different types of ships. The direct-drive electric outboard engine includes an external rotor mechanism and a stator mechanism; wherein the external rotor mechanism includes an external stator and an impeller; the external rotor is located outside the stator mechanism; and the impeller is located outside the external rotor.

Abstract: A trolling motor includes a head unit, a propulsion unit, and a shaft coupling the head unit to the propulsion unit. A shaft support couples the shaft to a mount base, which may be coupled to watercraft's deck. The shaft support is pivotable with respect to the mount base to move the trolling motor between a deployed position and a stowed position with respect to the deck. The trolling motor further includes a spring and damper combination coupled between the mount base and the shaft support, wherein a spring portion of the spring and damper combination provides a spring force to assist in pivoting the shaft support away from the deck, and a damper portion of the spring and damper combination provides a damping force to slow pivoting of the shaft support towards the deck and/or a metal-reinforced, self-lubricating bearing pivotably coupling the shaft support to the mount base.

Abstract: A trolling motor is provided comprising a motor housing, a motor controller, and a down tube assembly extending from the motor housing. When the trolling motor is in operation on a boat, the down tube assembly will support the motor housing submerged in water. The motor controller is mounted to the down tube assembly.

Abstract: A personal propulsion device for use with a floatation device includes a pair of propulsion units. Each propulsion unit comprises a power module, a motor, and a propeller. The motor is operationally coupled to the power module and the propeller so that the motor is positioned to selectively rotate the propeller to impart a force on water. Each propulsion unit is configured to be grasped in a respective hand of a user who is positioned on a floatation device. The user is positioned to submerge the propulsion unit in a body of water so that the floatation device is motivated across a surface of the body of water.

Abstract: A floating vessel with gearless pod propulsor and counter rotating propellers is secured to a hull, each pod having a lead propeller and a trailing propeller, each propeller connected to a shaft connected to either a stator and rotor or a hydraulic motor. A lead propeller turns in a first direction and a trailing propeller turns in an opposite direction simultaneously, generating thrust for the floating vessel along a thrust vector using the counter rotation of the trailing propeller to recover swirling energy from the lead propeller improving propulsive efficiency of the floating vessel. The pod is positioned below a water line of the floating vessel providing propulsion for the floating vessel without gears.

Abstract: A propeller propulsion system for a watercraft includes at least one electric motor and a propeller which can be driven by the electric motor. The propeller is a surface piercing propeller. The propulsion system includes a box-like body having a side wall on which the electric motor is fixed and a cover part on which an outdrive of the surface piercing propeller is applied. The side wall and the cover part include holes through which a shaft of the motor and a shaft of the outdrive respectively pass. The box-like body includes means for transmission of motion from the drive shaft to the outdrive shaft, and the propulsion system includes means for fixing the box-like body to a transom of the watercraft.

Abstract: Provided is a system for protecting submerged components of a watercraft from collision with a submerged object or a floor of a body of water. The system includes a depth sensor configured to measure a water depth beneath the watercraft, an actuated mechanism configured to adjust a depth of at least one of the submerged components, and a controller in communication with the depth sensor and the actuated mechanism. The controller is operable to receive the measured water depth and control the actuated mechanism to adjust the depth of the at least one submerged component as a function of the measured water depth to prevent the at least one submerged component from colliding with the submerged object or floor of the body of water.

Abstract: Disclosed is a wet suit, including: an upper jacket 100 for, putted on an upper body of a user, injecting or discharging air into an interior by the user's operation or a predetermined operation; a pair of lower pants 200 putted on a lower body of the user; and a propulsive generation portion 300 for, detachably putted on a waist of the user, generating a self-propulsive force according to the user's operation or a predetermined operation to generates a propulsive force for pushing water to a rear direction of the user.

Abstract: A hybrid electrical and mechanical ship propulsion and electric power system, includes a first mechanical power plant configured to drive a first propeller via a first shaft. There is a second electrical power plant configured to drive a second propeller via a second shaft. The second electrical power plant includes HTS generators and a high temperature superconductor (HTS) motor interconnected to the second shaft. There is a first electrical network to which the HTS motor is connected in order to energize the HTS motor to drive the second propeller via the second shaft.

Abstract: A robotic jellyfish comprises a torque reaction engine and a jellyfish body, wherein the torque reaction engine cyclically oscillates and causes a wave to propagate across the jellyfish body, accelerating thrust fluid and propelling the robotic jellyfish.

Abstract: Methods, systems, and apparatus, including for back-up power sources. In one aspect, a method includes providing a plurality of first battery devices, each first battery device respectively electrically coupled to a respective server rack in a plurality of server racks and having a respective capacity to provide power to the respective rack for a power anomaly for up to a first duration. Providing a second battery device electrically coupled to the plurality of server racks and having a capacity to provide power to the plurality of respective server racks for a power anomaly for up to a second duration, wherein the second duration is longer than the first duration. A power anomaly is a deviation of mains power from one or more of a nominal supply voltage and frequency.

Abstract: An integrated circuit (IC) chip including an array of asymmetrically distributed magnetic field sensing elements. Additionally, an integrated circuit (IC) chip includes a substrate, a sensing coil supported by the substrate and enclosing a portion of substrate, and a Hall effect sensor supported by the portion of the substrate enclosed by the sensing coil.

Abstract: A buoyant vessel having a hull and a drive system mounted to the hull, the system having a rectifier, a generator, an AC bus in communication with shore power or a charging system and the rectifier, a DC bus in communication with the rectifier, at least one energy storage system, an inverter, a prime mover, a load regenerating device, and a control and monitor system which has predefined specifications for at least one of: storage units of at least one energy storage system; stored therein and wherein the control and monitor system is adapted to: automatically control the DC/DC converters, relieve a current draw from one or more storage units, provide charging current, and automatically draw power and redirect energy.

Abstract: A remotely controlled robotic sensor ball and method of operation thereof. The robotic sensor ball includes an outer shell forming a ball, control circuitry positioned within the outer shell, a camera operably connected to the control circuitry, a propulsion system inside the outer shell, and one or more connectors. The control circuitry includes at least one processor, memory, and a wireless communication interface. The camera is configured to generate video signals of a view exterior to the outer shell. The propulsion system configured to cause the outer shell to rotate in response to instructions received via the wireless communication interface. The one or more connectors are configured to operably connect one or more sensors to the control circuitry. The one or more sensors are connectable in a modular manner.

Abstract: The present technology is directed generally to electric marine propulsion systems with drive trains, and associated systems and methods. In representative embodiments, the disclosed technology includes pre-assembled transmission cartridges, gear reduction planetary gears, and/or component support arrangements that can increase the life of the system and/or reduce manufacturing costs.

Abstract: The presently disclosure describes a system for a providing an assistive driving force to a wheelchair. The system comprises a power assist system which includes a motion sensing system that is configured to detect the motion of the power assist system, and hence of the wheelchair, and a power assist drive system that is configured to provide an assistive drive force. The system also comprises a sensor, such as may be embedded in a wearable wristband, that is configured to detect the motion of a user's hand and that is in communication with the power assist system. The system may be configured to determine whether the wheelchair is being manually pushed based at least in part on the user motion, and to activate an assistive drive force in response to a manual push. The system may also be configured to determine whether the wheelchair is being manually braked based at least in part on the user motion, and to deactivate an assistive drive force in response to a manual brake.

Abstract: Examples are disclosed that relate to watercraft with retractable drive mechanisms. One example provides a watercraft including a hull having a receiving compartment, and also having a deck. The watercraft also includes a drive unit extending through the deck and the hull of the watercraft and being configured to receive rotational input. The drive unit includes a driveshaft and propeller moveable between an extended position in which the propeller is positioned underneath the hull and a retracted position in which the propeller is positioned at least partially within the receiving compartment.

Abstract: A retrofittable watercraft propulsion device enables motorized propulsion and maneuvering of a watercraft occupied by a user. The retrofittable watercraft propulsion device includes an elongated shaft, an impeller pump, a handle, a control input device, a portable power source, a swivel bracket, and a microprocessor. The elongated shaft submerges the impeller pump below the waterline and provides support for the user while the watercraft is in motion. The impeller pump harnesses the water and generates thrust to propel and maneuver the watercraft. The control input device allows the user to throttle or brake the impeller pump. The portable power source supplies electrical energy to the microprocessor and the impeller pump. The swivel bracket swivels the elongated shaft and redirects the thrust of the impeller pump. Finally, the microprocessor controls the impeller pump based on how the user operates the control input device.

Abstract: This propulsion unit for an aquatic vehicle consists of a mobile casing equipped with an azimuth bearing due to its mounting in a pivot connection in relation to a hull element of the aquatic vehicle, the azimuth bearing having a closed volume provided to contain a hydraulic fluid, the propulsion unit having a drive shaft of a propeller, said shaft being mounted rotatably within the mobile casing by means of at least one bearing having a closed space adapted to contain a hydraulic fluid, an electrical machine being adapted to drive the rotary drive shaft in relation to the mobile casing, the propulsion unit having a supply circuit adapted to supply the closed space of the shaft bearing with hydraulic fluid. The supply circuit has a supply duct connecting the closed space of the shaft bearing and the closed volume of the azimuth bearing.

Abstract: A wireless controller configured to operate the propulsion system of a vehicle, and in particular a watercraft, using intuitive, analog controls, whereby the controls allow for movement of the vehicle in forward, reverse, left, and right directions, at varying speeds, with the propulsion system in one embodiment having a pair of fixed motors each with a rotating propeller, with all directional and speed variations accomplished by operating each of the propellers in the same or opposite direction as the other propeller, each propeller operating at various speeds or no speed.

Abstract: A self-contained marine propulsion impeller system, whereby, the impeller is driven from an outer perimeter of a cylinder, thereby, creating thrust. The impeller is connected to an inner wall of the cylinder. The cylinder has a primary end located opposite a secondary end. The primary end of the cylinder has a primary sealing member and a primary bearing member. The secondary end of the cylinder has a secondary sealing member and a secondary bearing member. A plurality of magnets are connected to an outer perimeter wall of the cylinder. The plurality of magnets are located between the first bearing member and the second bearing member. The cylinder is surrounded by a housing. At least one coil winding is connected to an inner wall surface of the housing. The rotating cylinder is suspended within the housing by the first bearing member and the secondary bearing member.

Abstract: The purpose of the present invention is to provide an engine in which operation of a control system and communication of information can be performed easily form above the engine. A blank part is formed in a top cover provided on an upper surface of an engine arranged in an engine room of a ship so as to penetrate vertically the top cover, an engine side operation part is arranged so as to face the blank part, and an upper end of the engine side operation part is positioned lower than an upper surface of the top cover.

Abstract: A gearless speed reducer or increaser consists of an input shaft, an output shaft, and a motor connected to the input shaft. There is an external race connected to one of the shafts, and an internal race attached to the other shaft. Two ball bearings are disposed between the races and held in place by a finger assist. After the ball bearings have been inserted, the shafts are tilted relative to each other so that the balls become fixed in pockets created between the races and cannot slide within the races.

Abstract: A bow and stern thruster apparatus includes a motor, a propeller, a battery, a radio receiver, control logic, and power driver circuitry; together forming a fully integrated thruster unit that slides up and down along a guide device to a hull attachment fixture near the water line of a boat. The deployed thruster unit can act as a bow or a stern thruster depending on where the guide device and attachment fixture are mounted to the boat. The thruster unit is retracted by raising it along the guide device to be stowed well above the water line, or to be removed entirely from the hull.

Abstract: Methods, systems, and apparatus, including for back-up power sources. In one aspect, a method includes providing a plurality of first battery devices, each first battery device respectively electrically coupled to a respective server rack in a plurality of server racks and having a respective capacity to provide power to the respective rack for a power anomaly for up to a first duration. Providing a second battery device electrically coupled to the plurality of server racks and having a capacity to provide power to the plurality of respective server racks for a power anomaly for up to a second duration, wherein the second duration is longer than the first duration. A power anomaly is a deviation of mains power from one or more of a nominal supply voltage and frequency.

Abstract: A watch device includes a processor, a display and a memory. The memory includes instructions for establishing a network connection between the watch device and an electronic GPS mapping computer of a watercraft for transmitting, receiving or displaying data.

Abstract: An electric watercraft propulsion system includes a battery assembly capable of generating AC power, an electric motor electrically connected to the battery assembly, and an output drive shaft mechanically connected to the electric motor.

Abstract: The invention provides an encapsulated magnetically geared brushless electric marine propulsion system with the principle components arranged axially around the central shaft. The marine propulsion system includes: the brushless DC motor, comprised of the stator fixed to the central shaft and motor magnets fixed within the motor rotor coupled to the central shaft using precision ball bearings; the high-speed magnetic gear rotor coupled to the motor rotor comprising an alternating array of magnets fixed to a ferromagnetic backing; the environmental barrier which protects the motor and additionally houses pole pieces to modulate magnetic flux; the low-speed magnetic gear rotor coupled to the central shaft and comprised of an alternating array of magnets fixed to a ferromagnetic backing; the propeller coupled to the low-speed magnetic gear rotor; and the shroud coupled to the struts of the motor mounting system.

Abstract: The invention relates to a system and method for cooling of a pod propulsion device, including a motor casing (3) and a strut (2), which strut (2) is connected at a lower part thereof to the motor casing (3) and is arranged to be connected at an upper part thereof to a hull (1) of a ship, said motor casing (3) including a housing (6) enclosing an electric motor (5) with a stator (51) and a rotor, wherein periodically a forced cooling air flow (W,S) is shifted to use a front duct (2A) as supply (S) for limited time period TF and thereafter shift to use the aft duct (2B) as supply (S) for a limited time period TA. The invention also relates to a ship provided with such a system and method for cooling of pod propulsion device.

Abstract: An activation and operation mode system for an electrochemical battery for the propulsion of marine craft, in particular for torpedoes; the system being equipped with an inlet valve for the inflow of water from the outside environment, a flow rate regulator of the flow input through the inlet valve, an outlet valve for the outflow of the liquids and gases produced by the chemical reaction, and a mode valve movable from a discharge position, in which the fluid produced by the chemical reaction is conveyed to the outlet valve, and a recirculation position, in which said fluid is made to recirculate through the electrochemical cells of the battery; the inlet valve, the outlet valve, the flow rate regulator and the mode valve being grouped in a single external body so as to define a compact monolithic assembly.

Abstract: The converter includes a plurality of input lines and one or more output lines. Each input line is connected to a group of supply circuits and the supply circuits of each group are connected to different output lines. The electric generator comprises a stator and a rotor. The stator has a plurality of windings. Each winding has a plurality of phases. Each phase comprises bars connected in series. The phases have a first connection at one end, a second connection at the other end and a third connection in an intermediate position between the first and the second connection.

Abstract: A trolling motor system for a light-weight watercraft comprises: a mounting system attaches to the watercraft, the mounting system includes a bracket and a plate, the plate includes a first end, a moveable end, and a hinge therebetween, a connector removably joins the bracket to the watercraft, a pivot connects the bracket to the first end of the plate; a winch is located adjacent the first end and is adapted to raise and lower the movable end between an up position and a down position; a guidance mechanism is coupled to and below the moveable end, the guidance mechanism includes a wire system for controlling rotational movement of the trolling motor; and a trolling motor affixed to and located below the guidance mechanism.

Abstract: The present invention provides for a novel floatation device useful for use by a snorkeler.

Abstract: The present disclosure relates to a ship's propulsion unit such as a ship's azimuthing propulsion unit. The propulsion unit can include at least one supporting metal sheet arranged between an support section of a shell structure of the propulsion unit and an cylindrical outer surface of a cylindrical section of a motor housing section of the shell structure for providing additional support for the motor housing section of the shell structure at the shell structure of the support section.

Abstract: A trolling motor system for a light-weight watercraft comprises: a mounting plate for attachment to the watercraft, the plate includes a fixed end, a moveable end, and a hinge therebetween, a winch is located adjacent the fixed end adapted to raise and lower the movable end between an up position and a down position, a guidance mechanism is coupled to and below the moveable end, and a trolling motor affixed to and located below the guidance mechanism. The system may also include a quick release mechanism coupling the guidance mechanism and trolling motor to the moveable end. The guidance mechanism may include a wire system for controlling rotational movement of the trolling motor. In use, when the watercraft is moved into or out of the water, portions of the system may be easily removed from the watercraft, so that the entire weight of the system is not a hindrance.

Abstract: This underwater vehicle includes an electrolyte-activated electrochemical fuel cell to supply it with electrical power, which fuel cell includes: an electrochemical power production cell (3), a reservoir (4) to contain the electrolyte. means of circulation (7) of the electrolyte between the electrochemical cell (3) and the reservoir (4), comprising a semi-axial flow pump arranged axially in the reservoir and comprising a motorized wheel rotatably mounted in a diffuser, characterized in that the diffuser has the general shape of a dome to direct the flow of the electrolyte coming out of the pump in a direction substantially parallel to the axis of the pump, and thus of the reservoir.

Abstract: The power transmission apparatus may include a battery, a motor generator that is switchable between a driving state and a power generation state, at least a load, an inverter to switch the motor generator to any of the driving state and the power generation state, a charging state detecting means to detect a charged amount C of the battery, an absorbing horsepower detecting means to detect the absorbing horsepower Lp of the load, and a control device to switch the motor generator to any of the power generation state and the driving state by means of the inverter, based on the absorbing horsepower Lp detected by the absorbing horsepower detecting means and the charged amount C of the battery that is detected by the charging state detecting means.

Abstract: The invention relates to a floating vessel for taking liquid samples, comprising a shell (2) that has a hull (3) to be submerged in a liquid medium below the water line and a superstructure (4) arranged above the water line; the vessel also comprises air propulsion means, means for taking and storing samples, and means for remotely controlling the air propulsion means and the sampling means; and the vessel further comprises a secondary detachable shell (32) provided with means for fixing to the shell (2) of the vessel, covering at least the hull of the vessel.