Direct FLUX actuated axial flow jet drive

Abstract

Propulsion systems for vessels are provided herein. The systems include an intake section that directs water into an integrated motor-impeller assembly, i.e., a flux module, featuring a ring of permanent magnets and electromagnetic windings powered via a sealed connector from a battery. A downstream vane-equipped stator section rectifies accelerated flow before it exits through a nozzle to produce thrust. Various embodiments further comprise an intake filter to block debris from entering the system, a steering bucket for lateral control of the vessel, and electronic control systems with motor controllers and position sensors. In select embodiments, the propulsion system is housed within a hull recess beneath a protective cover and cooled by surrounding water. These presently disclosed propulsion systems eliminate the need for through-hull drive shafts, reduce drag, reduce vessel draft, and improve overall propulsion efficiency.

Description

DIRECT FLUX ACTUATED AXIAL FLOW JET DRIVEBy:Jason Daniel WoodsDIRECT FLUX ACTUATED AXIAL FLOW JET DRIVECOPYRIGHT NOTICE

[0001] A portion of the disclosure of this patent document contains material which is subject to copyright protection. The Applicant makes no objection to the facsimile reproduction of the patent as published by the United States Patent and Trademark Office (“USPTO”) but otherwise reserves all copyright rights whatsoever.CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This utility patent application claims the benefit of U.S. Ser. No. 63 / 652,937 filed May29, 2024, with the USPTO. That provisional application is titled “Integrated Modular Segment Added to an Axial Flow Jetpump Allowing for Direct Electro Magnetic Driven Impeller,” and is incorporated herein in its entirety by reference.BACKGROUND OF THE DISCLOSURE

[0003] In conventional marine jet-drive systems, such as those used in jet boats, personal watercraft (“PWC”), and jet skis, a submerged pump / impeller unit is driven by an inboard engine, e.g., an internal combustion engine, via an output shaft that passes through the hull. This arrangement requires multiple bearings, shaft and hull seals, and transmission linkages to couple the engine to the pump, resulting in significant mechanical losses, complex sealing requirements, increased noise, and elevated maintenance demands.

[0004] Alternative “rim-drive” thrusters eliminate the through-hull shaft configuration found in conventional jet-drive systems by integrating an electric motor’s stator windings into an outer ring around unshrouded propeller blades. However, because the blades hang below the hull, rim-drive units increase vessel draft, expose the drive to grounding damage, and generate substantial drag. Lacking internal support for thrust loading and without a stator section to straighten (or rectify) the swirling flow of water produced by the rotating ring, these designs waste motor torque and fluid spin energy, and remain prone to cavitation, blade flex, and vibration at higher speeds and torques due to the outer ring and unshrouded propeller arrangement.

[0005] Accordingly, a need exists for an electrically powered jet propulsion system that integrates the motor and impeller into a single, submerged, hull-recessed unit to eliminate through-hull shafts, complex sealing arrangements, and reduce the drag experienced by the vessel.A need further exists for systems that capture and convert the full torque and rotational energy of the motor into linear thrust, provide robust radial and axial support, leverage surrounding water for cooling, and shield the drive system from grounding damage and submerged debris.SUMMARY OF THE DISCLOSURE

[0006] In one embodiment of the presently disclosed subject matter, a propulsion system for a vessel is provided. In this embodiment, the propulsion system includes an intake section configured to direct a flow of water into the system, a flux module having a first flux module end connectable to the intake section, and an opposing second flux module end. The flux module further comprises an impeller having a plurality of blades, an impeller support shaft connectable to the impeller, a ring of permanent magnets affixed to the impeller, and a flux module stator disposed about both the impeller and the ring of permanent magnets. The flux module stator of the present embodiment further comprises electromagnetic windings and a sealed power connector, wherein the electromagnetic windings are coupled to the sealed power connector and the sealed power connector is configured to receive electrical power from a battery to generate a rotating electromagnetic field to induce rotation of the impeller and the ring of permanent magnets. The presently disclosed propulsion system further includes a stator section having a first stator end connectable to the second flux module end, an opposing second stator end, and a vane configured to direct the flow of water through the system. The presently disclosed propulsion system further comprises a nozzle connectable to the second stator end and is configured to discharge the flow of water from the system, wherein electrical power is supplied to the electromagnetic windings via the sealed power connector to generate the rotating electromagnetic field to rotate the impeller and the ring of permanent magnets, such that the flow of water is drawn into the system through the intake section, accelerated by the rotating impeller, directed through the vane, and discharged through the nozzle for vessel propulsion.

[0007] In an alternate embodiment of the presently disclosed subject matter, a propulsion system for a vessel is provided. In this embodiment, the propulsion system includes an intake section configured to direct a flow of water into the system, a flux module having a first flux module end connectable to the intake section, and an opposing second flux module end. The flux module further comprises a flux shield disposed about the flux module, an impeller having a plurality of blades, an impeller support shaft connectable to the impeller, a ring of permanent magnets affixed to the impeller, and a flux module stator disposed about both the impeller and thering of permanent magnets. Stated differently, the ring of permanent magnets embodies an annular ring of magnets, wherein the magnets are selected from the group consisting of neodymium, samarium, alnico, ferrite (composite), and combinations thereof, directly coupled and affixed to the impeller that rotates with and in a same direction as the impeller and connected impeller support shaft. The flux module stator of the present embodiment further comprises electromagnetic windings and a sealed power connector, wherein the electromagnetic windings are electrically coupled to the sealed power connector and the sealed power connector is configured to receive electrical power from a battery to generate a rotating electromagnetic field to induce rotation of the connected impeller and ring of permanent magnets. Stated differently, the ring of permanent magnets and the impeller are rotating components of the present embodiment, wherein the electromagnetic windings are stationary components that are affixed concentrically about the ring of permanent magnets, the impeller, and the plurality of blades of the impeller. The presently disclosed propulsion system further includes a stator section having a first stator end connectable to the second flux module end, an opposing second stator end, and a vane configured to direct the flow of water through the system. The presently disclosed propulsion system further comprises a nozzle connectable to the second stator end and is configured to discharge the flow of water from the system, a steering bucket affixed to an outlet of the nozzle, and a control system comprising a motor controller configured to convert direct current electrical power from the battery into three-phase alternating current electrical power and supply the three-phase alternating current electrical power to the electromagnetic windings disposed within the flux module. Further, the control system comprises at least one sensor configured to detect a rotational position of the impeller and user-operable steering controls. In the present embodiment, the control system is connectable to the sealed power connector and is further configured to (i) supply three-phase alternating current electrical power to the electromagnetic windings, and (ii) transmit steering inputs received from the user-operable steering controls to the steering bucket to steer the vessel.

[0008] In another embodiment of the presently disclosed subject matter, a propulsion system for a vessel is provided. In this embodiment, the propulsion system includes an intake section configured to direct a flow of water into the system, an intake filter disposed at the intake section to prevent ingress of detritus, and a plurality of spacers and fasteners to connect and position the intake section to a flux shield. A flux module is disposed within the flux shield and comprises an impeller having a plurality of blades, an impeller support shaft connectable to the impeller, anover-molded ring of permanent magnets affixed to the impeller, and a flux module stator disposed about the impeller and the ring of permanent magnets. In the present embodiment as well as the proceeding embodiments, bearings may be positioned within the flux module to both support and facilitate rotation of the impeller support shaft. The flux module stator of the present embodiment further comprises electromagnetic windings and a sealed power connector, wherein the electromagnetic windings are coupled to the sealed power connector and the sealed power connector is configured to receive electrical power from a battery to generate a rotating electromagnetic field to induce rotation of the impeller and the ring of permanent magnets. The presently disclosed propulsion system further includes a stator section having a first stator end connectable to the flux module, an opposing second stator end, and a plurality of vanes, each having a curved leading edge and a straight trailing edge, to rectify the flow of water through the system. The presently disclosed propulsion system further comprises a nozzle connectable to the second stator end and configured to discharge the flow of water from the system, a steering bucket affixed to an outlet of the nozzle, a motor controller configured to convert direct current electrical power from the battery into three-phase alternating current electrical power and to supply the three-phase alternating current electrical power to the electromagnetic windings, at least one sensor configured to detect a rotational position and / or speed of the impeller, and user-operable steering controls connectable to the steering bucket. The presently disclosed propulsion system further includes a hull interface having a recess on an underside of the vessel sized to receive the system, and a cover plate disposed over the recess and the system to protect the system from damage, wherein electrical power supplied to the sealed power connector via the battery is converted by the motor controller into three-phase alternating current electrical power to supply power to the electromagnetic windings and generate the rotating electromagnetic field to rotate the impeller and ring of permanent magnets, such that the flow of water is drawn into the system through the intake section, accelerated by the rotating impeller, directed through the plurality of vanes, and discharged through the nozzle to propel the vessel.BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 shows a first perspective view of a propulsion system of the present disclosure, in one embodiment.

[0010] Figure 2 shows a first exploded view of the propulsion system of Figure 1.

[0011] Figure 3 shows a partial, first sectional view of the propulsion system taken along Line III-III of Figure 1.

[0012] Figure 4 shows a partial sectional, rear perspective view of the propulsion system of Figure 1 as embodied in a first representative vessel.

[0013] Figure 5 shows a rear perspective view of a dual propulsion system as in Figure 1 in a working environment.

[0014] Figure 6 shows a first perspective view of a propulsion system of the present disclosure, in a second embodiment.

[0015] Figure 7 shows a first exploded view of the propulsion system of Figure 6.

[0016] Figure 8 shows a first perspective view of a propulsion system of the present disclosure, in a third embodiment.

[0017] Figure 9 shows a first exploded view of the propulsion system of Figure 8.

[0018] Figure 10 shows a partial sectional, rear perspective view of a dual propulsion system as in Figure 8 in a working environment.DETAILED DESCRIPTION OF SELECTED EMBODIMENTS

[0019] Embodiments of the present disclosure are provided herein; however, it is to be understood that the disclosed embodiments are merely examples and are not necessarily limited to features and limitations described herein. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to understand and use the present disclosure.

[0020] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as is commonly understood by one of ordinary skill in the art to which this disclosure belongs.

[0021] Wherever the phrase “for example,” “such as,” “including,” and the like are used herein, the phrase “and without limitation” is understood to follow unless explicitly stated otherwise. Similarly, “an example,” “exemplary,” and the like are understood to be non-limiting.

[0022] The term “about,” when used in connection with a numerical value, refers to the actual given value, and to the approximation to such given value that would reasonably be inferred by one of ordinary skill in the art, including approximations due to the experimental and / or measurement conditions for such given value.

[0023] The terms “comprising,” “including,” “having,” “involving,” (and similarly “comprises,” “includes,” “has,” and “involves”), and the like may be used interchangeably and have the same meaning. Specifically, each of the terms is defined consistent with the common United States Patent Law definition of “comprising” and is therefore interpreted to be an open term meaning “at least the following,” and is also interpreted not to exclude additional features, limitations, aspects, etc. Thus, for example, “a device having components a, b, and c” means that the device includes at least components a, b, and c. Similarly, the phrase “a method involving steps a, b, and c” means that the method includes at least steps a, b, and c.

[0024] In the present disclosure, the terms “aft” or “after,” when used to denote a location or direction, refers to a rearward portion of a vessel or a direction toward a stern of the vessel.

[0025] In the present disclosure, the term “bow” means a foremost part of the vessel.

[0026] In the present disclosure, the term “detritus” means particulate matter, debris, or foreign objects (e.g., sand, organic matter, or marine growth) carried by water that could clog or damage the systems disclosed herein.

[0027] In the present disclosure, the term “draft” refers to a vertical distance between a waterline and a lowest point of the hull of the vessel (or propulsion unit) submerged in a body of water.

[0028] In the present disclosure, the term “fore” or “forward,” when used to denote a location or direction, refers to a frontward portion of the vessel or a direction toward the bow of the vessel.

[0029] In the present disclosure, the term “heading” means a direction in which the bow of a vessel is pointed or moving at a given moment, typically expressed as an angle relative to true North or magnetic North.

[0030] In the present disclosure, the term “lateral steering” and its variants means directing discharged water flow laterally (i.e., to port or starboard) to change the heading of a vessel.

[0031] In the present disclosure, the term “over-molding” refers to a manufacturing process in which an additional layer of material (e.g., polymer) is molded over components (such as magnets or windings) to encapsulate and seal them. Over-molding is formulated and applied so as not to impede transfer of magnetic flux between and among electromagnetic components, while providing protection against corrosion and water ingress.

[0032] In the present disclosure, the term “port” refers to a left side of the vessel when facing forward (toward the bow).

[0033] In the present disclosure, the term “starboard” refers to a right side of the vessel when facing forward (toward the bow).

[0034] In the present disclosure, the term “stem” means a rearmost part of a vessel.

[0035] Turning back to the present disclosure, the present disclosure relates generally to vessel propulsion systems. More specifically, the present disclosure relates to electrically powered jet propulsion systems for marine vessels. Further still, the present disclosure relates to a direct flux actuated axial flow jet drive system for marine vessels.

[0036] In a first embodiment of the presently disclosed subject matter, a propulsion system for a vessel is provided. In this embodiment, the propulsion system comprises an intake section, a flux module, a stator section, and a nozzle, each of which are arranged in series along a central axis to draw in, accelerate, straighten, and eject water to propel the vessel in both a forward direction and a reverse direction in a body of water.

[0037] The intake section directs a flow of water into the system through one or more inlets sized and shaped for optimal fluid capture across a range of vessel speeds and operating environments. In one embodiment, a removable intake filter, which may embody a mesh screen, perforated plate, or other strainer element, may be fitted at the inlet to prevent detritus from entering downstream components of the propulsion system. Filter media and housing materials may include plastics, polymers, 3D-printed resins, or metals and corrosion-resistant alloys such as stainless steel and aluminum. Alternate intake configurations may employ variable-geometry throat rings or debris-shedding bar designs. The intake section is suitable for drawing in fresh, brackish, or salt water from rivers, lakes, estuaries, coastal areas, open seas, and other waterways, and the presently disclosed propulsion system may be mounted to, affixed, or designed for vessels such as PWCs, jet boats, yachts, patrol craft, ferries, workboats, inflatables, including rigid inflatable boats (“RIBs”) and rigid-hulled inflatable boats (“RHIBs”), kayaks, paddleboards, and unmanned vehicles.

[0038] The flux module houses, via an external covering referred to herein as a flux shield, a rotor-stator assembly (described below) and includes a first flux module end connectable to the intake section, and an opposing second flux module end. The flow of water from the intake section enters the flux module and engages an impeller, which may embody a rotor of the rotor-stator assembly and may further comprise a plurality of blades. Disposed about, bonded to, or affixed to the impeller is an annular ring of permanent magnets, which may be referred to throughout thisspecification simply as a ring of permanent magnets. The impeller is secured on an impeller support shaft which rides on one or more bearings within the flux module. The impeller and ring of permanent magnets are surrounded by a flux module stator. The flux module stator further comprises electromagnetic windings and a sealed power connector. The flux module stator embodies a stator of the rotor-stator assembly introduced above. The electromagnetic windings are supplied with three-phase alternating current electrical power and may be sealed by over-molding or potting compounds that electrically insulate and waterproof the electromagnetic windings while allowing magnetic flux (also known as a rotating electromagnetic field) to pass uninterrupted to the ring of permanent magnets disposed about the impeller. Much like the electromagnetic windings of the flux module, the ring of permanent magnets affixed to the impeller may also embody over-molding to protect the magnets from corrosion while still permitting transfer of electromagnetic energy from the electromagnetic windings to the ring of permanent magnets to induce rotation of the impeller. Electrical power is delivered from a battery disposed within a hull of the vessel through the sealed power connector, which may include plated pins, O-ring seals, and keyed bayonet or threaded mating configurations, for watertight electrical connection to a motor controller. The motor controller converts direct-current electrical power from the battery into three-phase alternating current electrical power and energizes the electromagnetic windings, creating the rotating electromagnetic field that is capable of driving or rotating the impeller in a first direction, i.e., the forward direction, and in a second direction, i.e., the reverse direction, to propel the vessel in the body of water. The flux shield may be fabricated from metals, metal alloys, or high-strength polymers and can include passive cooling fins or increased external surface area to conduct heat into the surrounding water. Optional cathodic protection (e.g., sacrificial anodes) or anti-fouling systems (e.g., audio-frequency pulsing) may be integrated into the flux module to inhibit corrosion and marine growth.

[0039] The stator section, which has a first stator end connectable to the second flux module end and an opposing second stator end, may comprise one or more vanes arranged to straighten and further accelerate the flow of water after it has been initially accelerated by and passed through the impeller. The one or more vanes may also be referred to as rectifying vanes or guide vanes, as the one or more vanes receive turbulent or swirling water from the impeller and straighten out the water to increase thrust and output of the propulsion system. Each of the one or more vanes may embody a curved leading edge and a straight trailing edge to optimize thrust efficiency. Vanecount, profile, and spacing may be tailored to vessel size and performance needs. The stator section and one or more vanes may be formed of plastics, polymers, metals, or alloys chosen for structural strength and corrosion resistance.

[0040] The nozzle is connectable to the second stator end and serves to reduce a flow cross-section to increase exit velocity and produce thrust. An optional variable-restriction insert within a throat of the nozzle allows tuning of back-pressure to match a torque profile of the propulsion system. At an outlet of the nozzle, a steering bucket may be affixed to direct the flow of water laterally for maneuvering the vessel; this steering bucket may be mechanically linked to user-operated controls disposed on the vessel and / or electrically actuated. In alternate configurations, one or more propulsion units may be installed side-by-side in a single recess or respective recesses at a stem of the vessel to form an array, each secured by one or more fasteners through a cover plate that protects the one or more propulsion units. The cover plate may include corrugations, gratings, cut-outs, or flow channels that create rearward suction to sweep debris past the intake section and corresponding intake filter, if equipped, preventing clogging and enabling weedless operation of the vessel and propulsion unit(s), permitting the vessel to operate in shallow water environments.

[0041] Connecting the propulsion system to the hull of the vessel is achieved by mating the propulsion system into the recess formed in an underside of the hull of the vessel. The recess is sized to receive the propulsion system, and the cover plate is fastened, preferably with corrosion-resistant hardware, i.e., one or more fasteners, to protect against submerged debris, grounding, and trailering impacts. The sealed power connectors pass through the hull of the vessel above a waterline to maintain a watertight integrity of the hull of the vessel.

[0042] In operation, the flow of water enters through the intake section and intake filter, if equipped, then is accelerated by the rotating impeller within the flux module as the electromagnetic windings are energized with three-phase alternating current electrical energy from the motor controller. The surrounding body of water provides passive cooling of the propulsion unit, and as such, the propulsion unit does not require auxiliary cooling systems or cooling piping. The flow of water is then straightened by the one or more guide vanes and ejected through the nozzle (and steering bucket if equipped) to propel and steer the vessel. The presently disclosed propulsion system does not require a drive shaft to pass through the hull of the vessel like conventional jet-drive systems; instead, all components of the propulsion system, with the exception of thesealed power connectors, reside within the recess created in the underside of the hull of the vessel. Eliminating complex shaft seals and hull penetrations reduces drag, removes mechanical losses associated with shaft-driven jet-pumps, and permits increased thrust output in diverse marine applications. Furthermore, by including the propulsion system(s) within the recess or recesses within the hull of the vessel, a draft of the vessel is reduced when compared to vessels equipped with traditional jet-drive propulsion systems.

[0043] In a second embodiment of the presently disclosed subject matter, a propulsion system for a vessel is provided. In this embodiment, the propulsion system comprises an intake section, a flux module, a stator section, a nozzle, a steering bucket, and a control system, each arranged in series along a central axis to intake, accelerate, straighten, and discharge water for vessel propulsion and steering.

[0044] The intake section is configured to direct a flow of water into the propulsion system. The intake section may optionally include a removable intake filter, comprising a mesh screen, perforated plate, or other strainer element, to prevent detritus from entering downstream components of the propulsion system. The intake filter may be fabricated from plastics, polymers, 3D-printed resins, or corrosion-resistant alloys such as stainless steel and aluminum. Alternate intake configurations may employ variable-geometry throat rings or debris-shedding bar designs. The intake section is suitable for drawing in fresh, brackish, or salt water from rivers, lakes, estuaries, coastal areas, open seas, and other waterways, and can be mounted within, mounted on, or used with various vessels including personal watercraft, jet boats, yachts, patrol craft, ferries, workboats, inflatables, kayaks, paddleboards, and unmanned vessels.

[0045] The flux module includes a first flux module end connectable to the intake section, an opposing second flux module end, and a flux shield, which is an outer protective housing encasing a rotor-stator assembly of the flux module. A rotor of the rotor-stator assembly disposed within the flux module comprises an impeller with a plurality of blades bonded to an annular ring of permanent magnets. The impeller is secured on an impeller support shaft riding on internal bearings. Concentric about the impeller and ring of permanent magnets is a flux module stator, which includes both electromagnetic windings and sealed power connectors. The electromagnetic windings and the ring of permanent magnets may each be over-molded with a waterproof, electrically insulating compound that seals and protects against corrosion while permitting magnetic flux transfer to drive rotation of the impeller, and as such, the vessel, in both forwardand reverse directions. Direct current electrical power is delivered from an onboard battery through the sealed power connectors, which may embody plated pins, O-ring seals, and keyed bayonet or threaded mating, to a motor controller. The motor controller converts the direct current electrical energy from the battery, which may further comprise a bank or plurality of onboard batteries, into three-phase alternating current electrical power and energizes the electromagnetic windings, creating a rotating electromagnetic field that drives the impeller and ring of permanent magnets. The flux module, or protective enclosure, may be fabricated from metals, metal alloys, or high-strength polymers and can incorporate passive cooling fins or increased external surface area to dissipate heat into a surrounding body of water. Optional sacrificial anodes or audio-frequency anti-fouling modules may be integrated into the flux shield to inhibit corrosion and marine growth. Furthermore, one or more grease ports may be disposed on an outside of the flux module such that grease may be supplied to one or more internal components of the flux module, including one or more bearings and the impeller support shaft.

[0046] The stator section has a first stator end connectable to the second flux module end and an opposing second stator end. The stator section houses one or more guide vanes configured to straighten and further accelerate a swirling or turbulent flow of water exiting the impeller. Each of the one or more vanes may feature a curved leading edge and a straight trailing edge to optimize thrust efficiency, with vane count, profile, and spacing tailored to vessel size and performance. The stator section and vanes may be formed of plastics, polymers, metals, or alloys selected for structural strength and corrosion resistance.

[0047] The nozzle is connectable to the second stator end and serves to reduce the flow cross-section, increasing exit velocity of the flow of water to produce thrust and drive the vessel within the surrounding body of water. The nozzle may include an optional variable-restriction insert within its throat to tune back-pressure and match a torque profile of the propulsion system.

[0048] The steering bucket may be affixed to an outlet end of the nozzle to direct discharged water laterally for vessel maneuvering. The steering bucket may incorporate an electronically actuated variable-restriction mechanism, such as a movable flap or iris, to adjust outlet diameter and vary thrust output. The steering bucket is operatively linked to user-operable steering controls via mechanical linkages, electric actuators, or hydraulic systems.

[0049] The control system comprises the motor controller, at least one sensor, and user-operable steering controls. The sensor, such as a Hall-effect device, rotary encoder, orresolver, may be mounted within the flux module to detect a rotational position and / or a rotational speed of the impeller and provide feedback to the motor controller for speed and torque regulation. The user-operable steering controls interface with the steering bucket actuator to direct lateral thrust and may also be configured to throttle the propulsion system up or down. Stated differently, the user-operable controls may be used both for steering the vessel as well as controlling the flow of water through the system to either increase or decrease torque, and proportionally, speed of the vessel through the body of water. Together, these elements enable precise control of both propulsion and heading of the vessel.

[0050] The propulsion system may be affixed to a hull of the vessel by inserting it into a recess formed in an underside of the hull of the vessel and securing it with one or more corrosion-resistant fasteners. A cover plate, optionally featuring corrugations, gratings, cut-outs, or flow channels, is disposed over the recess to protect the propulsion system from debris, grounding, and impacts, while generating rearward suction to sweep detritus past the intake section and intake filter.

[0051] When submerged, the propulsion system is cooled passively by the surrounding water, eliminating the need for auxiliary cooling hardware. By containing all moving components within the recess and by connecting the propulsion system to the battery, motor controller, user-operated controls, and control system via the sealed power connectors which pass through sealed orifices in the hull of the vessel, conventional drive-shaft penetrations and complex shaft seals are avoided, reducing drag, reducing draft of the vessel, removing mechanical losses associated with shaft-driven jet-pumps, and permitting increased thrust efficiency across diverse marine applications.

[0052] In a third embodiment of the presently disclosed subject matter, a propulsion system for a vessel is provided. In this embodiment, the propulsion system comprises an intake section, an intake filter, a plurality of spacers and fasteners to connect the intake section to a flux shield, which houses a flux module, a stator section, a nozzle, a steering bucket, a motor controller, at least one sensor, user-operable steering controls, and a hull interface including a recessed mounting location and a cover plate.

[0053] The intake section is configured to direct a flow of water into the system through one or more inlets sized and shaped to optimize water capture across a range of vessel speeds and operating conditions. The intake section may be fabricated from plastics, polymers, 3D-printedresins, or corrosion-resistant alloys such as stainless steel, and can include variable-geometry throat rings or debris-shedding bar designs to suit various hull shapes and debris loads.

[0054] The intake filter is disposed at the inlet of the intake section to prevent ingress of detritus into the propulsion system. The intake filter may embody a removable mesh screen, perforated plate, or other strainer element, and is likewise constructed of plastics, polymers, or metals. The removable design permits easy cleaning or replacement, ensuring reliable operation in environments ranging from weed-laden rivers to sandy coastal waters.

[0055] The plurality of spacers and fasteners connect the intake section to the flux shield. The spacers establish and maintain a precise gap between the intake section and the flux shield, optimizing flow conditions and minimizing turbulence. The fasteners, preferably corrosion-resistant bolts or studs, pass through aligned through-openings on both components, to wit, the intake section and the flux shield, to secure the intake section rigidly to the flux shield, while O-ring or gasket seals at these interface locations prevent leakage of grease from the propulsion system and ingress of surrounding water into the propulsion system.

[0056] The flux module, which is disposed within a protective housing (the flux shield) comprises an impeller with a plurality of blades, an impeller support shaft affixed to the impeller and riding on internal bearings, and an over-molded ring of permanent magnets bonded to the impeller. Concentric about the impeller and ring of permanent magnets is a flux module stator, which further comprises electromagnetic windings and one or more sealed power connectors. The electromagnetic windings and ring of permanent magnets each feature an over-molding of waterproof, electrically insulating material that seals and protects against corrosion while allowing unobstructed magnetic flux transfer. The one or more sealed power connectors protrude through the flux shield, and incorporate plated pins, O-ring seals, and keyed bayonet or threaded mating features to receive electrical power from an onboard battery. The one or more sealed power connectors mate with female power connectors within the hull of the vessel and permit transfer of electrical power from the onboard battery, which may further comprise one or more batteries connected in parallel and series depending on a desired power and current output, to the electromagnetic windings of the flux module to induce rotation of the coupled impeller and ring of permanent magnets.

[0057] The stator section of the propulsion unit has a first stator end connectable to the flux shield, and an opposing second stator end connectable to the nozzle. The stator section houses aplurality of vanes, each with a curved leading edge and straight trailing edge to rectify swirling flow from the impeller and further accelerate the flow of water as it passes through the propulsion system. The vane count, profile, and spacing are selected to match vessel size and desired thrust characteristics.

[0058] The nozzle, which is connectable to the stator section reduces a flow cross-section to increase exit velocity and generate thrust. The nozzle may incorporate an optional variable-restriction insert in its throat to tune back-pressure to a desired torque curve of the propulsion system, allowing a manufacturer and / or a user to optimize performance for different load conditions.

[0059] The steering bucket is affixed to an outlet of the nozzle to direct lateral flow for vessel maneuvering. The steering bucket may include mechanically linked or electrically actuated variable-restriction mechanisms (e.g., movable flaps or iris assemblies) to further adjust outlet diameter and vary thrust direction and magnitude. The steering bucket connects to user-operable steering controls located at a helm of the vessel (a location towards the bow of the vessel), providing the user with an ability to steer and control the vessel.

[0060] The motor controller is configured to convert direct current electrical power from the battery into three-phase alternating current electrical power and to supply that power to the electromagnetic windings via the one or more sealed power connectors. The motor controller may be housed within the hull or integrated into the flux shield, and includes circuitry for current, voltage, and temperature monitoring to protect the propulsion system.

[0061] At least one sensor is configured to detect the rotational speed and / or position of the impeller. The sensor, such as a Hall-effect device, rotary encoder, or resolver, is mounted inside the flux module, where it provides real-time feedback to the motor controller for precise speed and torque regulation, smooth reversing, and anti-cavitation control.

[0062] User-operable steering controls interface with the steering bucket actuator and the motor controller, enabling the user to adjust heading and thrust output. The controls may be mechanical, electric, or hydraulic, and may include manual joysticks, foot pedals, touchscreen interfaces, or other helm-mounted input devices. These controls may also be integrated with autopilot systems or GPS-based station-keeping systems for automated positioning and directional control of the vessel. Such GPS-based station-keeping systems may include a GPS receiver mounted on the vessel and a bow-mounted electric thruster or trolling motor, which together workin coordination with the propulsion system to maintain either or both a position and heading of the vessel. The electric thruster is preferably affixed to the hull near the bow and is operatively connected to the motor controller or a shared control network. When station-keeping is engaged, the GPS system continuously monitors the location and heading of the vessel and issues corrective commands to both the bow thruster and the propulsion system. The propulsion system responds by adjusting thrust magnitude and direction, while the bow thruster manages lateral movement and rotational alignment. This coordinated X-axis and Y-axis control allows the vessel to maintain a fixed position and heading in real time, automatically compensating for wind, current, and wave action without additional user input.

[0063] The hull interface comprises a recess formed in an underside of the vessel hull, sized to receive the propulsion system. The propulsion system is secured in the recess by one or more corrosion-resistant fasteners. The cover plate is disposed over the recess and propulsion system to protect against submerged debris, grounding impacts, and trailering damage. The cover plate may feature corrugations, gratings, or flow-channel cut-outs that create rearward suction to sweep detritus past the intake section and filter, facilitating weedless operation.

[0064] In operation, electrical power supplied to the sealed power connectors is converted by the motor controller into three-phase alternating current electrical power that energizes the electromagnetic windings, generating a rotating electromagnetic field that drives the over-molded annular ring of permanent magnets and impeller. Water is drawn in through the intake section and filter, accelerated by the impeller, straightened by the stator vanes, and discharged through the nozzle and steering bucket to propel the vessel. Passive cooling of all submerged components is achieved by heat transfer to the surrounding water, eliminating a need for separate cooling systems.

[0065] In this third embodiment, the propulsion system may be provided as a single unit installed in its own recess and covered by an individual cover plate. Alternatively, as described in the second embodiment, a second propulsion system may be affixed proximate the first propulsion system at a stern of the vessel to increase overall thrust output. The two units can each occupy their own recesses with respective cover plates, or they may share a larger, common recess covered by a single, extended cover plate that protects both units and maintains the debris-sweeping and hydrodynamic benefits of the individual installations. In all of the aforementioned embodiments, the recess or recesses reduce the draft of the vessel when compared to conventional jet-drive systems commonly found on vessels.

[0066] Turning now to the figures, Figures 1 - 5 show a propulsion system generally designated by element 100. More particularly, Figure 1 shows a first perspective view of a propulsion system 100. Figure 2 shows a first exploded view of the propulsion system 100, Figure 3 shows a partial, first sectional view of the propulsion system 100 taken along Line III-III of Figure 1, and Figure 4 shows a partial sectional, rear perspective view of the propulsion system 100 of Figure 1 as embodied in a first representative vessel 102A. Lastly, Figure 5 shows an rear perspective view of a dual propulsion system comprising a first propulsion system 100A and a second propulsion system 100B as embodied in a second representative vessel 102B.

[0067] Propulsion system 100 primarily includes an intake section 110, a flux module 130, a stator section 150, and a nozzle 170 all of which are arranged in series along a central axis. The intake section 110 defines one or more inlets sized and shaped for optimal fluid capture across a range of vessel speeds, and the intake section 110 directs a flow of water F into the system 100. Immediately downstream of the inlet section 110 and connectable to the inlet section 110 at a first flux module end 132, the flux module 130 encloses a rotor-stator assembly which comprises an impeller 136 having a plurality of blades 137 mounted on an impeller support shaft 138, wherein the impeller 136 and its plurality of blades 137 are affixed to and surrounded by an annular ring of permanent magnets 140. When electrically energized (as described below), the impeller 136, the impeller support shaft 138, and the ring of permanent magnets 140 rotate in a first direction to draw the flow of water F into the system 100, accelerate the flow of water F, and discharge the flow of water F to the stator section 150. Electromagnetic windings 143 of a flux module stator 142 encircle the ring of permanent magnets 140 and impeller 136. Both the ring of permanent magnets 140 and the electromagnetic windings 143 of the flux module stator 142 may receive over-molding 141, 145, respectively, with waterproof, electrically insulating material to permit magnetic flux transfer while sealing against water ingress into sensitive electromagnetic components of the flux module 130. A sealed power connector 144 protrudes from the flux module 130 and serves to receive electrical power from a motor controller 176 and supply said electrical power to the electromagnetic windings 143 disposed within the flux module stator 142. The motor controller 176 converts the direct current electrical power (or input power) into three-phase alternating current electrical power, thereby energizing the electromagnetic windings 143 to generate a rotating electromagnetic field that drives the impeller 136 via the ring of permanentmagnets 140 in forward (the first direction) or reverse (a second direction) directions to accelerate the flow of water F through the system 100.

[0068] In Figure 2, a removable intake filter 104 is shown schematically disposed within the intake section 110. The intake filter 104 may embody a mesh screen, perforated plate, or similar strainer element fabricated from plastics, polymers, or corrosion-resistant alloys, and is sized to prevent detritus ingress into downstream components. In alternate embodiments, the intake filter 104 may be molded, cast, bolted, or welded directly into or upstream of the intake section 110. In this exploded arrangement, it is appreciated that the first flux module end 132 mates with the intake section 110 via a sealing interface, a second flux module end 134 mates to the flux module stator 150 at its first stator end 152, and the flux module stator 150, at a second stator end 154, is connectable to the nozzle 170. The impeller 136, the impeller support shaft 138, the ring of permanent magnets 140 with its corresponding over-molding 141, and electromagnetic windings 143 with its corresponding over-molding 145 of the flux module stator 142 are also shown. The sealed power connector 144 and corresponding O-ring seals, plated pins, and bayonet coupling are also visible in this view, illustrating how electrical connections pass through the flux module 130 while maintaining waterproof integrity.

[0069] In Figure 3, an interior of the intake section 110, the flux module 130, stator section 150, and nozzle 170 are more clearly shown. Here, the impeller 136 and ring of permanent magnets 140 rotate on bearings within the flux module 130, surrounded by the electromagnetic windings 143. Downstream, the stator section 150 houses one or more vanes 155 which may include curved leading edges and straight trailing edges that serve to rectify the now accelerated and swirling flow of water F exiting the impeller 136, straightening and further accelerating the flow F. A grease port 156 (shown in Figure 2) disposed on the stator section 150 provides maintenance access for lubricating internal bearings and the impeller support shaft 138 interfaces. This view further highlights how a variable-geometry profde of the vanes 155 optimizes thrust by minimizing turbulence and aligning the flow of water F into the nozzle 170.

[0070] In Figure 4, the propulsion system 100 is shown as installed in the representative vessel 102A. In this figure, the representative vessel 102A is a single-propulsion unit jet ski, however, it is to be understood that vessel 102A may also include other PWCs, jet boats, yachts, patrol craft, ferries, workboats, inflatables, including rigid inflatable boats (“RIBs”) and rigid-hulled inflatable boats (“RHIBs”), kayaks, paddleboards, and unmanned vehicles. The propulsion system 100 isinstalled through a recess 107 formed in an underside of the hull 106 and secured by one or more fasteners 182 (shown in Figure 5). A cover plate 180 spans the recess 107, protecting against submerged debris, grounding, and trailering impacts. The sealed power connectors 144 (not shown in Figure 4) pass through the hull 106 above a waterline of the vessel 102A and mate with female power ports (not shown) that route direct current electrical power from the battery 146 to the motor controller 176. The motor controller 176, like the battery 146, which may comprise a single battery or a plurality of batteries arranged in series, parallel, or both, resides within the hull 106 and converts said input power into three-phase alternating current electrical power which is then supplied to the electromagnetic windings 143 via the sealed power connectors 144. Downstream of the stator section 150 (not shown in Figure 4), the nozzle 170 constricts a cross-section of the flow of water F, optionally via a variable-restriction throat insert, to increase exit velocity and produce thrust. Pivotally affixed to an outlet portion 171 of the nozzle 170 is a steering bucket 172, which links to user-operated steering controls 174 via mechanical, electrical, or hydraulic actuation to laterally deflect and direct a discharged flow of water F’ for vessel maneuvering. A surrounding body of water passively cools the submerged propulsion unit 100, obviating auxiliary cooling hardware, and optional cathodic protection or anti-fouling modules may be integrated into the flux module 130 to prevent rusting, corrosion, and damage to internal components caused by both the surrounding body of water and turbulent flow of water F into the system and the discharged flow of water F’ from the system 100. Also shown in Figure 4 are a bow 105 of the vessel 102A wherein the user-operated steering controls 174 are mounted and a stern 103 of the vessel 102A wherein the propulsion system 100 is affixed.

[0071] In Figure 5, the dual propulsion system comprising the first propulsion system 100A and the second propulsion system 100B embodied in representative vessel 102B is shown. Propulsion systems 100A, 100B mount side-by-side at the stern 103 of the vessel 102B in respective recesses 107A, 107B under a common cover plate 180, wherein the cover plate 180 is affixed to the underside of the hull 106 of the vessel 102B via one or more corrosion-resistant fasteners 182. Optionally, the fasteners 182 may be of such strength and length to affix both the cover plate 180 and the propulsion systems 100A, 100B to the underside of the vessel 102B. Nozzles 170A and 170B independently control the discharge flow of water F’ for increased total thrust, enhanced maneuverability, and redundancy. Variable-geometry vanes, such as vanes 155, and nozzle cross-sections of each propulsion system 100A, 100B combine to maximize efficiencyacross operating conditions. Submerged components of both systems 100A, 100B remain passively cooled by the surrounding body of water. It is to be understood that representative vessel 102B comprises the dual propulsion system, however, by extension, a vessel, such as vessel 102B, may embody three or more propulsion units for scalable thrust capacities.

[0072] Figure 6 shows a propulsion system 200 of the present disclosure in a second embodiment. For the sake of clarity and reference, Figures 6 - 7 will be described together as they relate to the propulsion system 200. Figure 7 shows a first exploded view of the propulsion system 200 of Figure 6.

[0073] In these views, propulsion system 200 comprises an intake section 210, a flux module 230, a stator section 250, a nozzle 270, and a steering bucket 272 all of which are arranged in series along a central axis. Similar to intake section 110, the intake section 210 defines one or more inlets sized to capture a flow of water F and direct the flow of water F into the system 200, and a removable intake filter 204, e.g., a mesh screen or perforated plate of stainless steel, polymer, or resin, is seated within the inlet section 210 to exclude detritus. In the exploded view of Figure 7, it can be appreciated that the intake section 210 connects to the flux module 230 at its first flux module end 232, and the flux module 230 is connectable at its second flux module end 234 to a first stator end 252 of the stator section 250. Additionally, a second stator end 254 of the stator section 250 is connectable to the nozzle 270, and the steering bucket 272 connects to the nozzle 270 at its outlet 271.

[0074] The flux module 230 houses a rotor-stator assembly which includes an impeller 236 with blades 237 mounted on an impeller support shaft 238 that rides on internal bearings, an annular ring of permanent magnets 240 is affixed to the impeller 236, and concentric electromagnetic windings 243 of the flux module stator 242 surround the ring of permanent magnets 240 and impeller 236. Both the electromagnetic windings 243 and the annular ring of permanent magnets 240 receive over-molding 245, 241, respectively with waterproof, electrically insulating compounds that permit magnetic flux transfer while sealing against corrosion. A sealed power connector 244, featuring plated pins 247, O-ring seals, and a keyed coupling, protrudes through the flux module 230 to mate with hull-mounted female ports (not shown). The sealed power connector 244 is connectable to the electromagnetic windings 243 via the flux module 230, and the sealed power connector 244 via its plated pins 247 is electrically connectable to the battery, such as battery 146 of Figure 4, via the hull-mounted female ports and motor controller 276.Through these connections, direct current electrical power stored in the one or more batteries, such as battery 146, is supplied to the motor controller 276, converted to three-phase alternating current electrical power, and then transmitted via the hull-mounted female power ports to the plated pins 247 within the sealed power connector 244 to the electromagnetic windings 243 of the flux module stator 242 to induce rotation of the impeller 236 and connected annular ring of permanent magnets 240

[0075] The flux module 230 may include passive cooling fins or increased surface area to dissipate heat into a surrounding body of water and may further comprise integrated sacrificial anodes or audio-frequency anti-fouling modules to protect the propulsion system 200 from corrosion induce by the surrounding body of water. Grease port 256 disposed within the flux module stator 250 provides access for lubricating the internal bearings and impeller support shaft 238

[0076] Stator section 250, with its first stator end 252, which connects to the flux module 230 at its second flux module end 234, is also connectable to the nozzle 270 via its second stator end 254. The stator section 250 houses guide vanes 255. Each vane 255 features a curved leading edge and a straight trailing edge to straighten and further accelerate the swirling flow of water F exiting impeller 236, optimizing thrust and minimizing turbulence.

[0077] Nozzle 270 reduces a flow cross-section to increase exit velocity. The steering bucket 272 is pivotally mounted at outlet 271 to redirect flow laterally for vessel maneuvering. The steering bucket 272 incorporates an electronically actuated variable-restriction mechanism (e.g., movable flap or iris) to adjust outlet diameter and modulate thrust output. The steering bucket 272 is further connectable to user-operable steering controls 274 via mechanical linkages, electric actuators, or hydraulic lines.

[0078] A control system comprises the motor controller 276, at least one sensor, such as a Hall-effect device or rotary encoder which may be mounted within the flux module 230 to detect impeller rotational position or speed, and user-operated controls 274. Sensor feedback enables the motor controller 276 to regulate three-phase alternating current power, converted from direct current electrical power supplied from the battery, such as battery 146, and supply the three-phase alternating current electrical power to the electromagnetic windings 243 disposed within the flux module 230 for precise speed, torque, and direction control, as well as forward and reverse thrust functionality.

[0079] Figure 8 shows a propulsion system 300 of the present disclosure in a third embodiment. For the sake of clarity and reference, Figures 8 - 10 will be described together as they relate to propulsion system 300. Figure 9 shows a first exploded view of the propulsion system 300 of Figure 8, and Figure 10 shows a partial sectional, rear perspective view of a first propulsion system 300A and a second propulsion system 300B of Figure 8 as embodied in a representative vessel 302.

[0080] In these views, the propulsion system 300 is shown as arranged along a central longitudinal axis and comprises, in series, an intake section 310, an intake filter 304, a flux module 330, a stator section 350, a nozzle 370, and a steering bucket 372. Intake section 310 defines one or more inlets sized and shaped to direct a flow of water F into the system 300, and the intake filter 304 (e.g., a removable mesh screen or perforated plate of stainless steel, polymer, or resin) is positioned at the inlet section 310 to prevent detritus ingress.

[0081] In Figure 9, the propulsion system 300, shown in exploded view, comprises a flux module 330 which further comprises an impeller 336 having a plurality of blades 337 mounted on an impeller support shaft 338, an over-molded 341 ring of permanent magnets 340 bonded to the impeller 336, over-molded 345 electromagnetic windings 343, and sealed power connectors 344 with respective plated pins 347. A flux module stator 342, which is comprised of the electromagnetic windings 343, its respective over-molding 345, the sealed power connectors 344, and its respective plated pins 347 receive electrical energy to generate a rotating electromagnetic field which in turn rotates the impeller 336 via its connected annular ring of permanent magnets 340. The flux module 330 is connectable to the intake section 310 via its first flux module end 332, and a second flux module end 334 connects the flux module 330 to the stator section 350 at its first stator end 352. Further, the stator section 350 is connectable to the nozzle 370 at its second stator end 354. Lastly, the steering bucket 372 is connectable to the nozzle 370.

[0082] The stator section 350 comprises one or more vanes 355 which serve to guide, straighten, and rectify a flow of water F from the impeller 336 and pass the flow of water F to the nozzle 270 and connected steering bucket 272. Additionally, a grease port 356 is present in Figure 9 and permits grease or other lubricants to be inserted within the stator section 350 for lubricating internal bearings and the impeller support shaft 338.

[0083] In Figure 10, a dual propulsion system is shown including the first propulsion system 300A and the second propulsion system 300B mounted on an underside of a hull 306 of the vessel302 proximate its stem 303. Tn this embodiment, the propulsion systems 300A, 300B are received within individual recesses 307A, 307B, respectively, and covered by a cover plate 380 which is connectable to the underside of the vessel 302 via a plurality of corrosion-resistant fasteners 382. Also shown in this view is a bow 305 of the vessel 302. Further, each of the propulsion systems 300A, 300B are equipped with individual steering buckets 372A, 372B, respectively which serve to control an output flow of water F’ from the systems 300A, 300B for vessel propulsion and lateral steering.

[0084] As previously stated, detailed embodiments of the presently disclosed subject matter are disclosed herein; however, it is to be understood that the disclosed embodiments are merely exemplary of the subject matter that may be embodied in various forms. It will be appreciated that many modifications and other variations stand within the intended scope of this subject matter as claimed below. In addition, “a” does not mean “one and only one;” “a” can mean “one and more than one.”

[0085] While the disclosure provides certain specific embodiments, the presently disclosed subject matter is not limited to those embodiments. A person of ordinary skill in the art will appreciate from the description herein that modifications can be made to the described embodiments and therefore that the specification is broader in scope than the described embodiments. All examples are therefore non-limiting.EXEMPLARY EMBODIMENTS

[0086] Embodiment 1 : A propulsion system for a vessel having an intake section configured to direct a flow of water into the system, a flux module having a first flux module end connectable to the intake section, and an opposing second flux module end. The flux module further comprises an impeller having a plurality of blades, an impeller support shaft connectable to the impeller, a ring of permanent magnets affixed to the impeller, and a flux module stator disposed about both the impeller and the ring of permanent magnets. The flux module stator of the present embodiment further comprises electromagnetic windings and a sealed power connector, wherein the electromagnetic windings are coupled to the sealed power connector and the sealed power connector is configured to receive electrical power from a battery to generate a rotating electromagnetic field to induce rotation of the impeller and the ring of permanent magnets. The presently disclosed propulsion system further includes a stator section having a first stator end connectable to the second flux module end, an opposing second stator end, and a vane configuredto direct the flow of water through the system. The presently disclosed propulsion system further comprises a nozzle connectable to the second stator end and is configured to discharge the flow of water from the system, wherein electrical power is supplied to the electromagnetic windings via the sealed power connector to generate the rotating electromagnetic field to rotate the impeller and the ring of permanent magnets, such that the flow of water is drawn into the system through the intake section, accelerated by the rotating impeller, directed through the vane, and discharged through the nozzle for vessel propulsion.

[0087] Embodiment 2: The propulsion system of the preceding Embodiment, wherein both the electromagnetic windings and the ring of permanent magnets are over-molded.

[0088] Embodiment 3: The propulsion system of any one of the preceding Embodiments, further comprising an intake filter disposed at the intake section to prevent ingress of detritus into the propulsion system.

[0089] Embodiment 4: The propulsion system of any one of the preceding Embodiments, further comprising a motor controller configured to convert direct current electrical power from the battery into three-phase alternating current electrical power for the electromagnetic windings.

[0090] Embodiment 5: The propulsion system of any one of the preceding Embodiments, further comprising a steering bucket disposed at an outlet of the nozzle to direct the flow of water laterally to steer the vessel.

[0091] Embodiment 6: The propulsion system of any one of the preceding Embodiments, wherein the steering bucket is connectable to a user-operated steering control on the vessel.

[0092] Embodiment 7: The propulsion system of any one of the preceding Embodiments, further comprising a second propulsion system, the propulsion systems being affixed proximate each other at a vessel stern to increase a thrust output.

[0093] Embodiment 8: The propulsion system of any one of the preceding Embodiments, wherein the propulsion system is connectable to a vessel hull, a recess being formed therein and being sized to receive the propulsion system, and further comprising a cover plate disposed over the recess and the propulsion system to protect the propulsion system.

[0094] Embodiment 9: The propulsion system of any one of the preceding Embodiments, further comprising one or more fasteners to affix the propulsion system within the recess.

[0095] Embodiment 10: The propulsion system of any one of the preceding Embodiments, wherein the propulsion system is submerged in a body of water and is cooled thereby.

[0096] Embodiment 11 : The propulsion system of any one of the preceding Embodiments, further comprising a plurality of power connector pins disposed on the flux module configured to pass through the vessel hull above a vessel waterline and to mate with corresponding female power ports in the vessel hull, the female power ports being electrically connectable to the motor controller and the battery.

[0097] Embodiment 12: The propulsion system of any one of the preceding Embodiments, wherein the vane comprises a curved leading edge and a straight trailing edge to rectify the flow of water through the stator section before delivering the flow of water to the nozzle.

[0098] Embodiment 13: The propulsion system of any one of the preceding Embodiments, wherein the nozzle is configured to accelerate the flow of water to produce thrust.

[0099] Embodiment 14: A propulsion system having an intake section configured to direct a flow of water into the system, a flux module having a first flux module end connectable to the intake section, and an opposing second flux module end. The flux module further comprises a flux shield disposed about the flux module, an impeller having a plurality of blades, an impeller support shaft connectable to the impeller, a ring of permanent magnets affixed to the impeller, and a flux module stator disposed about both the impeller and the ring of permanent magnets. The flux module stator of the present embodiment further comprises electromagnetic windings and a sealed power connector, wherein the electromagnetic windings are coupled to the sealed power connector and the sealed power connector is configured to receive electrical power from a battery to generate a rotating electromagnetic field to induce rotation of the impeller and the ring of permanent magnets. The presently disclosed propulsion system further includes a stator section having a first stator end connectable to the second flux module end, an opposing second stator end, and a vane configured to direct the flow of water through the system. The presently disclosed propulsion system further comprises a nozzle connectable to the second stator end and is configured to discharge the flow of water from the system, a steering bucket affixed to an outlet of the nozzle, and a control system comprising a motor controller configured to convert direct current electrical power from the battery into three-phase alternating current electrical power and supply the three-phase alternating current electrical power to the electromagnetic windings. Further, the control system comprises at least one sensor configured to detect a rotational position and rotational (angular) speed of the impeller and user-operable steering controls. In the present embodiment, the control system is connectable to the sealed power connector and is furtherconfigured to (i) supply three-phase alternating current electrical power to the electromagnetic windings, and (ii) transmit steering inputs received from the user-operable steering controls to the steering bucket to steer the vessel.

[0100] Embodiment 15: The propulsion system of any one of the preceding Embodiments, wherein both the electromagnetic windings and the ring of permanent magnets are over-molded.

[0101] Embodiment 16: The propulsion system of any one of the preceding Embodiments, wherein the steering bucket further comprises an electronically actuated variable restriction mechanism configured to adjust an outlet diameter to vary thrust output.

[0102] Embodiment 17: The propulsion system of any one of the preceding Embodiments, wherein the propulsion system is submerged in a body of water and is cooled thereby.

[0103] Embodiment 18: The propulsion system of any one of the preceding Embodiments, further comprising one or more fasteners to affix the propulsion system to a recess on an underside of the vessel, and a cover plate disposed over the recess and the propulsion system to protect the propulsion system.

[0104] Embodiment 19: A propulsion system having an intake section configured to direct a flow of water into the system, an intake filter disposed at the intake section to prevent ingress of detritus, and a plurality of spacers and fasteners to connect the intake section to a flux shield. A flux module is disposed within the flux shield and comprises an impeller having a plurality of blades, an impeller support shaft connectable to the impeller, an over-molded ring of permanent magnets affixed to the impeller, and a flux module stator disposed about the impeller and the ring of permanent magnets. The flux module stator of the present embodiment further comprises electromagnetic windings and a sealed power connector, wherein the electromagnetic windings are coupled to the sealed power connector and the sealed power connector is configured to receive electrical power from a battery to generate a rotating electromagnetic field to induce rotation of the impeller and the ring of permanent magnets. The presently disclosed propulsion system further includes a stator section having a first stator end connectable to the flux module, an opposing second stator end, and a plurality of vanes, each having a curved leading edge and a straight trailing edge, to rectify the flow of water through the system. The presently disclosed propulsion system further comprises a nozzle connectable to the second stator end and configured to discharge the flow of water from the system, a steering bucket affixed to an outlet of the nozzle, a motor controller configured to convert direct current electrical power from the battery into three-phasealternating current electrical power and to supply the three-phase alternating current electrical power to the electromagnetic windings, at least one sensor configured to detect a rotational position of the impeller, and user-operable steering controls connectable to the steering bucket. The presently disclosed propulsion system further includes a hull interface having a recess on an underside of the vessel sized to receive the system, and a cover plate disposed over the recess and the system to protect the system from damage, wherein electrical power supplied to the sealed power connector via the battery is converted by the motor controller into three-phase alternating current electrical power to supply power to the electromagnetic windings and generate the rotating electromagnetic field to rotate the impeller and ring of permanent magnets, such that the flow of water is drawn into the system through the intake section, accelerated by the rotating impeller, directed through the plurality of vanes, and discharged through the nozzle to propel the vessel.

[0105] Embodiment 20: The propulsion system of any one of the preceding Embodiments, further comprising a second propulsion system, the propulsion systems being affixed proximate each other at a vessel stern to increase a thrust output.

Claims

CLAIMSI Claim:

1. A propulsion system for a vessel, comprising: an intake section configured to direct a flow of water into the system; a flux module having a first flux module end connectable to the intake section, an opposing second flux module end, an impeller having a plurality of blades, an impeller support shaft connectable to the impeller, a ring of permanent magnets affixed to the impeller, and a flux module stator disposed about the impeller and the ring of permanent magnets, the flux module stator having electromagnetic windings and a sealed power connector, the electromagnetic windings being coupled to the sealed power connector, the sealed power connector being configured to receive electrical power from a battery to generate a rotating electromagnetic field to induce rotation of the impeller and the ring of permanent magnets; a stator section having a first stator end connectable to the second flux module end, an opposing second stator end, and a vane to direct the flow of water through the system; and a nozzle connectable to the second stator end and configured to discharge the flow of water from the system; wherein electrical power is supplied to the electromagnetic windings via the sealed power connector to generate the rotating electromagnetic field to rotate the impeller and the ring of permanent magnets, such that the flow of water is drawn into the system through the intake section, accelerated by the rotating impeller, directed through the vane, and discharged through the nozzle for vessel propulsion.

2. The propulsion system of claim 1, wherein both the electromagnetic windings and the ring of permanent magnets are over-molded.

3. The propulsion system of claim 1, further comprising an intake filter disposed at the intake section to prevent ingress of detritus into the propulsion system.

4. The propulsion system of claim 1, further comprising a motor controller configured to convert direct current electrical power from the battery into three-phase alternating current electrical power for the electromagnetic windings.

5. The propulsion system of claim 1 , further comprising a steering bucket disposed at an outlet of the nozzle to direct the flow of water laterally to steer the vessel.

6. The propulsion system of claim 5, wherein the steering bucket is connectable to a user-operated steering control on the vessel.

7. The propulsion system of claim 1, further comprising a second propulsion system, the propulsion systems being affixed proximate each other at a vessel stern to increase a thrust output.

8. The propulsion system of claim 1, wherein the propulsion system is connectable to a vessel hull, a recess being formed therein and being sized to receive the propulsion system, and further comprising a cover plate disposed over the recess and the propulsion system to protect the propulsion system.

9. The propulsion system of claim 8, further comprising one or more fasteners to affix the propulsion system within the recess.

10. The propulsion system of claim 1, wherein the propulsion system is submerged in a body of water and is cooled thereby.

11. The propulsion system of claim 1, further comprising a plurality of power connector pins disposed on the flux module configured to pass through the vessel hull above a vessel waterline and to mate with corresponding female power ports in the vessel hull, the female power ports being electrically connectable to the motor controller and the battery.

12. The propulsion system of claim 1, wherein the vane comprises a curved leading edge and a straight trailing edge to rectify the flow of water through the stator section before delivering the flow of water to the nozzle.

13. The propulsion system of claim 1, wherein the nozzle is configured to accelerate the flow of water to produce thrust.

14. A propulsion system for a vessel, comprising: an intake section configured to direct a flow of water into the system; a flux module having a first flux module end connectable to the intake section, an opposing second flux module end, a flux shield disposed about the flux module, an impeller having a plurality of blades, an impeller support shaft connectable to the impeller, a ring of permanent magnets affixed to the impeller, and a flux module stator disposed about the impeller and the ring of permanent magnets, the flux module stator having electromagnetic windings and a sealed power connector, the electromagnetic windings being coupled to the sealed power connector, the sealed power connector being configured to receive electrical power from a battery to generate a rotating electromagnetic field to induce rotation of the impeller and the ring of permanent magnets; a stator section having a first stator end connectable to the second flux module end, an opposing second stator end, and a vane to direct the flow of water through the system; a nozzle connectable to the second stator end and configured to discharge the flow of water from the system; a steering bucket affixed to an outlet of the nozzle; and a control system, comprising: a motor controller configured to covert direct current electrical power from the battery into three-phase alternating current electrical power, and supply the three-phase alternating current electrical power to the electromagnetic windings; at least one sensor configured to detect a rotational position of the impeller; and user-operable steering controls; wherein the control system is connectable to the sealed power connector and is further configured to (i) supply three-phase alternating current electrical power to theelectromagnetic windings, and (ii) transmit steering inputs received from the user-operable steering controls to the steering bucket to steer the vessel.

15. The propulsion system of claim 14, wherein both the electromagnetic windings and the ring of permanent magnets are over-molded.

16. The propulsion system of claim 14, wherein the steering bucket further comprises an electronically actuated variable restriction mechanism configured to adjust an outlet diameter to vary thrust output.

17. The propulsion system of claim 14, wherein the propulsion system is submerged in a body of water and is cooled thereby.

18. The propulsion system of claim 14, further comprising: one or more fasteners to affix the propulsion system to a recess on an underside of the vessel; and a cover plate disposed over the recess and the propulsion system to protect the propulsion system.

19. A propulsion system for a vessel, comprising: an intake section configured to direct a flow of water into the system; an intake filter disposed at the intake section to prevent ingress of detritus into the system; a plurality of spacers and fasteners to connect the intake section to a flux shield; a flux module disposed within the flux shield, the flux module having an impeller having a plurality of blades, an impeller support shaft connectable to the impeller, an over-molded ring of permanent magnets affixed to the impeller, and a flux module stator disposed about the impeller and the ring of permanent magnets, the flux module stator having electromagnetic windings and a sealed power connector, the electromagnetic windings being coupled to the sealed power connector, the sealed power connector being configured to receive electrical power from a battery to generate a rotating electromagnetic field to induce rotation of the impeller and the ring of permanent magnets;a stator section having a first stator end connectable to the flux module, and an opposing second stator end, the stator section having a plurality of vanes, each of the plurality of vanes having a curved leading edge and a straight trailing edge to rectify the flow of water; a nozzle connectable to the second stator end; a steering bucket affixed to an outlet of the nozzle; a motor controller configured to convert direct current electrical power from the battery into three-phase alternating current electrical power and to supply the three-phase alternating current electrical power to the electromagnetic windings; at least one sensor configured to detect a rotational position of the impeller; user-operable steering controls connectable to the steering bucket; and a hull interface having a recess on an underside of the vessel sized to receive the system, and a cover plate disposed over the recess and the system to protect the system from damage; wherein electrical power supplied to the sealed power connector via the battery is converted by the motor controller into three-phase alternating current electrical power to supply power to the electromagnetic windings and generate the rotating electromagnetic field that rotates the impeller and ring of permanent magnets, such that the flow of water is drawn into the system through the intake section, accelerated by the rotating impeller, directed through the plurality of vanes, and discharged through the nozzle to propel the vessel.

20. The propulsion system of claim 19, further comprising a second propulsion system, the propulsion systems being affixed proximate each other at a vessel stern to increase a thrust output.

Images