A PROPULSION SYSTEM FOR WATERCRAFTS

Abstract

A PROPULSION SYSTEM FOR WATERCRAFTS The present invention relates to a propulsion system [100] for watercrafts comprising a housing [102] that attaches to the watercraft via a fastening flange [112], the housing [102] comprises an inner cavity designed to hold a motor assembly [200], which powers a propeller to generate propulsion for the watercraft, at least one cavitation plate [110] monolithic with the housing [102], which helps prevent excess drag and shields the propeller from damage and at least one rudder fin [114] is fabricated with the housing [102] to minimize drag by guiding fluid flow and enabling precise navigational control over the watercraft. Refer to Figure 1

Specification

Description:A PROPULSION SYSTEM FOR WATERCRAFTS
FIELD OF THE INVENTION
[0001] The present invention relates to the field of a propulsion system for watercrafts that is designed for watercraft for addressing the challenges associated with achieving efficient propulsion, optimal navigation control, and environmental protection of internal components as well as pertains to an improved design that facilitates seamless operation of watercraft by enhancing propulsion force generation, reducing drag, and safeguarding sensitive electronics. In addition, the system is essential for optimizing watercraft performance, enhancing durability, and ensuring safe, reliable navigation in various aquatic environments.
BACKGROUND OF THE INVENTION
[0002] Advancements in watercraft propulsion systems address a critical need for efficient and reliable marine operation, particularly in demanding environments. The systems are essential to navigate effectively, ensuring that watercraft like boats and submarines may function under various water conditions with resilience and control. The focus on optimizing propulsion involves creating mechanisms that may withstand environmental elements, especially preventing water ingress, which historically has caused frequent internal component failures, reduced operational life, and necessitated complex maintenance routines.
[0003] Traditionally, marine propulsion systems have faced substantial challenges in protecting internal electronics from water exposure, as seals and housings tend to degrade over time or fail under high-pressure conditions. This degradation poses risks to internal wiring and electronic components, leading to frequent breakdowns and a need for costly repairs. Older systems often lack adequate protective structures, meaning vital electronics and power components are exposed to the risks of corrosion and damage due to moisture or direct water contact, impacting performance and reliability over time.
[0004] Drag is another significant factor, as it directly impacts both the fuel efficiency and the maneuverability of watercraft. In traditional propulsion designs, high drag occurs around the propeller, leading to increased fuel consumption and reduced control during navigation. This issue is compounded when water turbulence around the propeller becomes excessive, limiting the watercraft's speed and efficiency. Reducing drag is, therefore, a central requirement in modern systems to improve the power-to-effort ratio, ensuring the propulsion mechanism may support long-duration operations without compromising on speed or efficiency.
[0005] In traditional watercraft, the use of heavier conventional motors can significantly impact the efficiency and effectiveness of the vessel. Heavier motors limit the payload capacity of watercraft, meaning less space and weight allowance for carrying cargo, passengers, or specialized equipment. This restriction not only affects operational efficiency but also impacts the vessel's versatility across various applications, from commercial transport to military or recreational use. The additional weight from conventional motors often creates excess drag, reducing the fuel efficiency of the vessel. Higher fuel consumption directly translates to increased operational costs, and the increased drag can also make handling and maneuverability more challenging, particularly in vessels where precise control is essential.
[0006] Furthermore, traditional heavy motors place additional strain on the structural components of the watercraft, potentially leading to increased wear and maintenance needs. This maintenance adds to the long-term operational costs and limits the watercraft's availability due to downtime for repairs. As watercraft designs evolve to prioritize efficiency, maneuverability, and cargo capacity, the drawbacks of traditional heavy motors underscore the necessity for lighter, more efficient propulsion systems. In order to overcome the above-mentioned problems, there exists a need to develop a system for overcoming the cited problems.

SUMMARY OF THE INVENTION
[0007] In view of the foregoing disadvantages inherent in the prior art, the general purpose of the present disclosure is to provide a propulsion system for watercrafts, to include all advantages of the prior art, and to overcome the drawbacks inherent in the prior art.
[0008] Some of the objects of the present disclosure, which at least one embodiment herein satisfies, are as follows:
[0009] An object of the present disclosure is to ameliorate one or more problems of the prior art or to at least provide a useful alternative. An object of the present disclosure is to provide a propulsion system for watercrafts.
[0010] Another object of the present disclosure is to provide a propulsion system for watercrafts that is capable of developing an efficient, reliable propulsion system specifically designed for diverse watercraft applications.
[0011] Another object of the present disclosure is to provide a propulsion system for watercrafts that is capable of enhancing watercraft maneuverability by minimizing drag forces, thereby optimizing fuel efficiency and operational control.
[0012] Another object of the present disclosure is to provide a propulsion system for watercrafts that is capable of securing and protecting internal electronics and power components from water exposure, thereby ensuring long-term reliability and reducing maintenance needs.
[0013] Another object of the present disclosure is to provide a propulsion system for watercrafts that is capable of reducing weight of the propulsion system that increases the overall payload carrying capacity of watercrafts.
[0014] Yet another object of the present disclosure is to provide a propulsion system for watercrafts that aims to streamline assembly and maintenance processes to improve durability while providing robust navigation support under varying environmental conditions.
[0015] Other objects and advantages of the present disclosure will be more apparent from the following description, which is not intended to limit the scope of the present disclosure.
[0016] In view of the above objects, in one aspect, the current disclosure provides Another object of the present disclosure is to provide propulsion system for watercrafts that is capable of that is a robust and novel phishing-resistant authentication tool.
[0017] The propulsion system for watercrafts of the present disclosure facilitates a housing attached to a watercraft via a fastening flange. The fastening flange connects the housing to various watercraft types, such as boats, vessels, and submarines. Further, a hollow pipe runs between the fastening flange and the watercraft to safeguard wires and electronics. The housing contains an inner cavity, precisely machined to accommodate a motor assembly, which rotates a propeller to generate propulsion. The motor assembly includes a motor casing having at least two plates connected with the motor casing via multiple bolts, a stator disc with copper coils to generate an electromagnetic field, and two rotor discs embedded with permanent magnets to produce rotational force. Furthermore, the housing also features at least one shaft, which rotates along a rotating axis. At least one shaft to connect with the propeller.
[0018] In one embodiment, the present invention further facilitates that the housing includes a front cover and a back cover, each secured with rubber seals to prevent water ingress at the front and rear ends of the housing. Additionally, a cavitation plate monolithic with the housing prevents excessive drag and propeller damage, while a fabricated rudder fin aids in reducing drag and controlling navigation by channeling fluid flow.
[0019] In one embodiment, a method for operating the propulsion system involves securing the housing with the watercraft, attaching the cavitation plate and rudder fin, and connecting the motor assembly to the back cover using bolts. The configuration enhances watercraft propulsion efficiency, component protection, and navigational stability in challenging environments.


BRIEF DESCRIPTION OF DRAWING
[0020] The foregoing summary, as well as the following detailed description of various embodiments, is better understood when read in conjunction with the drawings provided herein. For the purposes of illustration, there are shown in the drawings exemplary embodiments; however, the presently disclosed subject matter is not limited to the specific methods and instrumentalities disclosed.
[0021] FIG. 1 illustrates a skeptical side view of a propulsion system for watercrafts, in accordance with the exemplary implementations of the present disclosure;
[0022] FIG. 2 illustrates an exploded skeptical view of a motor assembly associated with the propulsion system for watercrafts, in accordance with the exemplary implementations of the present disclosure;
[0023] FIG. 3 illustrates a skeptical front view of a rotor disk module associated with the motor assembly, in accordance with the exemplary implementations of the present disclosure;
[0024] FIG. 4 illustrates an exploded skeptical view of a propulsion system for watercrafts, in accordance with the exemplary implementations of the present disclosure;
[0025] FIG. 5 illustrates a skeptical rear view of a propulsion system for watercrafts, in accordance with the exemplary implementations of the present disclosure; and
[0026] FIG. 6 illustrates a skeptical front view of a propulsion system for watercrafts, in accordance with the exemplary implementations of the present disclosure.
[0027] Like reference numerals refer to like parts throughout the description of several views of the drawing.
DETAILED DESCRIPTION OF THE INVENTION
[0028] Embodiments are provided so as to thoroughly and fully convey the scope of the present disclosure to the person skilled in the art. Numerous details are set forth, relating to specific components, and methods, to provide a complete understanding of embodiments of the present disclosure. It will be apparent to the person skilled in the art that the details provided in the embodiments should not be construed to limit the scope of the present disclosure. In some embodiments, well-known processes, well- known apparatus structures, and well-known techniques are not described in detail.
[0029] The terminology used, in the present disclosure, is only for the purpose of explaining a particular embodiment and such terminology shall not be considered to limit the scope of the present disclosure. As used in the present disclosure, the forms "a," "an," and "the" may be intended to include the plural forms as well, unless the context clearly suggests otherwise. The terms "comprises," "comprising," "including," and "having," are open-ended transitional phrases and therefore specify the presence of stated features, integers, steps, operations, elements, modules, units and/or components, but do not forbid the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The particular order of steps disclosed in the method and process of the present disclosure is not to be construed as necessarily requiring their performance as described or illustrated. It is also to be understood that additional or alternative steps may be employed.
[0030] The following detailed description should be read with reference to the drawings, in which similar elements in different drawings are identified with the same reference numbers. The drawings, which are not necessarily to scale, depict illustrative embodiments and are not intended to limit the scope of the disclosure.
[0031] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed. In this application, the use of the singular includes the plural, the word "a" or "an" means "at least one", and the use of "or" means "and/or", unless specifically stated otherwise. Furthermore, the use of the term "including", as well as other forms, such as "includes" and "included", is not limiting. Also, terms such as "element" or "component" encompass both elements and components comprising one unit and elements or components that comprise more than one unit unless specifically stated otherwise.
[0032] Referring to FIG. 1, a skeptical side view of a propulsion system for watercrafts [100], is shown, in accordance with the exemplary implementations of the present disclosure. The propulsion system [100] comprises a housing [102], a front cover [104], a back cover [106], at least one shaft [108], at least one cavitation plate [110], a fastening flange [112], and at least one rudder fin [114]. Also, all of the components of the propulsion system [100] are assumed to be connected to each other unless otherwise indicated below. As shown in the figures all components shown within the propulsion system [100] should also be assumed to be connected to each other. Also, in FIG. 1 only a few units are shown, however, the propulsion system [100] may comprise multiple such units or the propulsion system [100] may comprise any such numbers of said components, as required to implement the features of the present disclosure.
[0033] The propulsion system [100] comprises the housing [102] configured to be attached with a watercraft. Herein, the warcraft is being referred to a boat, a vessel, a submarine, and more specifically to a radio-control boat, an autonomous underwater vessel, an autonomous surface vessel, and an autonomous loitering naval drone.
[0034] The housing [102] further comprises an inner cavity machined to accommodate a motor assembly (mentioned afterwards FIG. 2). Herein, the inner cavity is designed for optimal protection and support of the motor assembly, which may convert power to mechanical force. Further, the motor assembly is connected to a propellor of the warcraft. The propellor may translate a rotational energy from the motor assembly into thrust, which may further enable forward propulsion. The rotation energy from the motor assembly may cause the propellor to generate a force that propels the watercraft in a desired direction.
[0035] It is to be noted that the front cover [104], the back cover [106], the at least one shaft [108], the at least one cavitation plate [110], the fastening flange [112], and the at least one rudder fin [114] is to be described later on in the description.
[0036] Referring to FIG. 2, an exploded view of the motor assembly [200] is shown, in accordance with the exemplary implementations of the present disclosure. The motor assembly [200] comprises a motor casing [202], at least two plates [204], plurality of bolts [206], a stator disc [208], at least two rotor discs [210].
[0037] The motor assembly [200] comprises the motor casing [202] which may refer to a covering entity designed to protect the other components of the motor assembly [200]. The motor assembly [200] herein in casted with durable materials which may include but are not limited to aluminum, stainless steel and similar materials known to a person skilled in the art.
[0038] The motor assembly [200] mentioned herein may preferably referred to an axial flux motor, having a high efficiency and advantageous power-to-weight ratio. It is to be noted that any other motor having similar functionality can be used herein. The axial flux motor used herein may significantly differ from conventional radial flux motors, as the axial flux motor produces torque via a magnetic field that moves axially such as along the axis of the at least one shaft [108], rather than radially. In an implementation, the axial flux motor supports higher power outputs without increasing an overall size or weight of the housing [102]. In another implementation, the axial flux motor requires less space and weigh less than radial flux motors due to their compact design, which produces a high torque output for each unit of mass, thereby can be used in in applications where space and weight are constrained. In yet another implementation, the axial flux motor significantly increases the propulsion efficiency of the watercraft. It is to be noted that the watercraft may comprise a plurality of the axial flux motors within the watercraft as per the size and requirements of the watercraft. Further, any other motors can also be used for other purposes within the watercraft, which in any order may not limit the scope of the present disclosure.
[0039] The motor assembly [200] further comprises the at least two plates [204] configured to be connected with the motor casing [202]. The at least two plates [204] mentioned herein are installed to cope with electromagnetic forces within the motor and reduce potential losses. The at least two plates [204] herein are preferably made of solid cast iron or mild steel. The materials mentioned herein have the ability to retain magnetic flux and minimize eddy current losses. Moreover, the eddy current may cause unwanted heat generation and energy loss within the motor, which may further reduce the efficiency of the motor assembly [200]. Therefore, the materials mentioned herein have high magnetic permeability which maximizes efficiency and reduces power loss.
[0040] Further, the at least two plates [204] are connected with the motor casing [202] via the plurality of bolts [206]. The plurality of bolts [206] is positioned in a manner to maintain an exact air gap between the at least two plates [204] and the stator disc [208]. Herein, the air gap is crucial for an optimal performance of the motor assembly [200]. The plurality of bolts [206] mentioned herein are casted from non-magnetic materials such as brass or aluminum to avoid any interference with the magnetic field within the motor assembly [200], thereby further preventing any generation of eddy currents within the plurality of bolts [206]. In an alternative, to the non-magnetic materials, other materials such as steel or iron bolts may also be utilized that may have the capability of minimizing magnetic flux loss.
[0041] Further, the motor assembly [200] is further connected with the at least one shaft [108], which is further connected to the propeller, for providing a rotational energy generated by the motor assembly [200] to the propeller. Further, the at least one shaft [108] is capable of handling high-speed rotation without deformation, thereby proving essential in watercraft, especially under pressure.
[0042] The motor assembly [200] further comprises the stator disc [208] having one or more copper coils configured to receive a power supply and generate an electromagnetic field. Herein, the one or more copper coils are designed with precise winding, thickness for maximum efficiency and reduce eddy current losses. The one or more copper coils are winded over the stator disc [208] in a manner, allowing the one or more copper coils to produce a strong and focused electromagnetic field with minimal energy loss.
[0043] In an event, the one or more copper coils are energized, most likely via a direct current (DC) power, the one or more copper coils produce an electromagnetic field along the central axis of the stator disc [208], and in parallel to the at least one shaft [108]. Furter, the electromagnetic field creates the rotational force that moves the at least one shaft [108], thereby driving the propeller.
[0044] The motor assembly [200] further comprises the at least two rotor discs [210] which are in conjunction with the stator disc [208]. The at least two rotor discs [210] which are in conjunction with the stator disc [208] are connected via a mechanical means which is described later within the description.
[0045] Referring to FIG. 3, a skeptical front view of a rotor disk module [300] associated with the motor assembly [200] is shown, in accordance with the exemplary implementations of the present disclosure. FIG. 3 is used in conjunction with the FIG. 2.
[0046] The rotor disk module [300] herein comprises at least a rotor disc [210] embedded with a plurality of permanent magnets [216] as shown in the FIG. 3. Herein, the plurality of permanent magnets [216] is configured to generate a rotational force due to the generated electromagnetic field. The plurality of permanent magnets [216] mentioned herein are preferably Neodymium magnets, that are composed of a Neodymium-iron-boron composite. The Neodymium magnets have a high magnetic strength, as required for the necessary rotational force. It is to be noted that the plurality of permanent magnets [216] can include any other magnets other than the Neodymium magnets that may be known to a person skilled in the art.
[0047] Further, the plurality of permanent magnets [216] is secured onto the at least two rotor discs [210] using industrial-grade adhesives and are spaced precisely according to design calculations, which may ensure optimal interaction with the electromagnetic field. The plurality of magnets [216] is arranged with alternating polarity, thereby creating a changing magnetic flux as the at least two rotor discs [210] rotate. The alternating polarity of the plurality of magnets [216] is essential for generating a dynamic magnetic interaction with the electromagnetic field of the stator disc [208], thereby producing continuous rotational motion. The alternating polarity of the plurality of magnets [216] may provide a consistent and powerful torque output, which further maximizes the efficiency of the motor assembly [200].
[0048] Further, the air gap between the at least two rotor discs [210] and the stator disc [208] is maintained with a rotor connector [214] that may separate the at least two rotor discs [210] at a specific distance to optimize the magnetic interaction. Furthermore, the air gap prevents the strong magnetic forces between the at least two rotor discs [210] from causing deformation or damage to the at least two rotor discs [210]. It is to be noted that the at least one shaft [108] is directly connected to the at least two rotor discs [210] and the stator disc [208] via the rotor connector [214], via flanged bearings. The flanged bearings are preferably made from zinc-aluminum alloy for providing the necessary strength to handle high-speed applications.
[0049] Further, the front cover [104] as mentioned above is configured to be fixed with a front end of the housing [102] via a rubber seal [212] as shown in the FIG.2. Further, the front cover [104] is configured to prevent water to ingress inside the inner cavity of the housing [102] from the front end, which may further ensure that the internal components of the housing [102] are safe. As shown in the FIG.2, the rubber seal [212] is positioned in between the front cover [104] and the housing [102] to provide the necessary flexibility and tight fit to withstand varying pressures of the water that may present around the housing [102].
[0050] Similarly, the back cover [106] as mentioned above is configured to be fixed with a rear end of the housing [102] via another rubber seal [214] as shown in the FIG.2. Further, the back cover [106] is configured to prevent water to ingress inside the inner cavity of the housing [102] from the rear end.
[0051] Further, in an event of assembly of the propulsion system [100], firstly the motor assembly [200] is positioned inside the housing [102]. Once the motor assembly [200] is inserted, the front cover [104] is attached over the front face of the housing [102] via watertight nuts and bolts. Thereafter, the back cover [106] is installed. The rubber seal [212] and the another rubber seal [214] is placed around the front cover [104] and the back cover [106] prior to the securing of the front cover [104] and the back cover [106] to the housing [102].
[0052] Referring to FIG. 4, an exploded skeptical view of a propulsion system [100] for watercrafts is shown, in accordance with the exemplary implementations of the present disclosure. FIG. 5 illustrates a skeptical rear view of a propulsion system [100] for watercrafts is shown, in accordance with the exemplary implementations of the present disclosure. FIG. 6 illustrates a skeptical front view of a propulsion system [100] for watercrafts is shown, in accordance with the exemplary implementations of the present disclosure. Further, the FIG. 5 & the FIG. 6 are used in conjunction with the FIG. 4.
[0053] Further, the at least one cavitation plate [110] monolithic is connected with the housing [102] and configured to prevent excess drag on the watercraft and damage to the propeller. The at least one cavitation plate [110] establishes a minimum depth of water required for the propulsion system [100] and propeller to function properly. It is to be noted that the at least one cavitation plate [110] is positioned at a minimum depth in order to keep the propeller entirely submerged in water as required for efficient propulsion without unnecessary drag that would slow down the watercraft. The at least one cavitation plate [110] herein prevents the cavitation which may refer to a formation of vapor bubbles or cavities in a liquid, as the cavitation may damage the propeller.
[0054] For ease of understanding, the above paragraph is explained in a detailed manner. Considering an exemplary event, where the propeller is exposed to air, which may create a vacuum that resists the forward movement of the propeller. Herein, the exposure to air may cause the propeller to intake opposing force from the water, which not only impacts efficiency but can also result in wear and tear of the blades of the propeller.
[0055] Further, the housing [102] and the watercraft are connected via the fastening flange [112]. Herein, the fastening flange [112] is designed in a manner to bear the loads generated by the motor assembly [200] and the water resistance on the watercraft. Furthermore, a hollow pipe (not shown) is coupled between the fastening flange [112] and the watercraft. Herein, the hollow pipe is configured to secure wires and electronics from environmental damage. As would known to a person skilled in the art, that an exposure to water and external conditions may degrade or disrupt components that are present within the housing [102], therefore, the hollow pipe acts as a conduit to provide a safe and continuous transmission of power and control signals to the motor assembly [200], as required for the propulsion of the watercraft.
[0056] Further, the at least one rudder fin [114] is fabricated with the housing [102] and configured to reduce drag on the propeller by diving a fluid stream and enable proper navigation control over the watercraft. The at least one rudder fin [114] divides the fluid stream, which reduces resistance, or drag, on the motor assembly [200], thereby leading to a better efficiency of the motor assembly [200]. In another implementation, the at least one rudder fin [114] may provide a balance to the watercraft and further may assist in the navigation of the watercraft in a plurality of water conditions.
[0057] Referring to FIG. 7 an exemplary method flow diagram [700] for operating the operating the propulsion system [100], in accordance with exemplary implementations of the present disclosure is shown. In an implementation the method [700] is performed by the propulsion system [100].
[0058] Also, as shown in FIG. 7, the method [700] initially starts at step [702].
[0059] At step [704], the method [700] comprises attaching, via the fastening flange [112], the housing [102] configured to be attached with the watercraft, as the housing [102] comprises the inner cavity machined to accommodate the motor assembly [200], and the motor assembly [200] is configured to provide rotations to the propeller attached with the motor assembly [200] to generate a propulsion force for the watercraft.
[0060] The method [700] explains that the motor assembly [200] comprises the motor casing [202] which may refer to a covering entity designed to protect the other components of the motor assembly [200]. The motor assembly [200] further comprises an axial flux motor, having a high efficiency and advantageous power-to-weight ratio. The motor assembly [200] further comprises the at least two plates [204] configured to be connected with the motor casing [202]. The at least two plates [204] mentioned herein are installed to cope with electromagnetic forces within the motor and reduce potential losses.
[0061] The method [700] further explains that the motor assembly [200] is connected with the back cover [106] via the plurality of bolts [206]. The plurality of bolts [206] is positioned in a manner to maintain an exact air gap between the at least two plates [204] and the stator disc [208].
[0062] The method [700] further explains that the motor assembly [200] is further connected with the at least one shaft [108], which is further connected to the propeller, for providing a rotational energy generated by the motor assembly [200] to the propeller. The motor assembly [200] further comprises the stator disc [208] having one or more copper coils configured to receive a power supply and generate an electromagnetic field. The motor assembly [200] further comprises the at least two rotor discs [210] having a plurality of permanent magnets [216], to generate a rotational force due to the generated electromagnetic field.
[0063] At step [706], the method [700] comprises monolithically attaching the at least one cavitation plate [110] with the housing [102] and preventing, via the at least one cavitation plate [110], excess drag on the watercraft and damage to the propeller. The method [700] further explains that the at least one cavitation plate [110] monolithic is connected with the housing [102] and configured to prevent excess drag on the watercraft and damage to the propeller. The at least one cavitation plate [110] establishes a minimum depth of water required for the propulsion system [100] and propeller to function properly.
[0064] At step [708], the method [700] comprises fabricating the at least one rudder fin [114] with the housing [102] and reducing, via the at least one rudder fin [114], drag on the propeller by diving a fluid stream and enabling proper navigation control over the watercraft. The at least one rudder fin [114] divides the fluid stream, which reduces resistance, or drag, on the motor assembly [200], thereby leading to a better efficiency of the motor assembly [200]. In another implementation, the at least one rudder fin [114] may provide a balance to the watercraft and further may assist in the navigation of the watercraft in a plurality of water conditions.
[0065] The method [700] herein terminates at step [710].
[0066] While considerable emphasis has been placed herein on the specific features of the preferred embodiment, it will be appreciated that many additional features can be added and that many changes can be made in the preferred embodiment without departing from the principles of the disclosure. These and other changes in the preferred embodiment of the disclosure will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the disclosure and not as a limitation.
[0067] While the invention has been described in connection with what is presently considered to be the most practical and various embodiments, it is to be understood that the invention is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements.
[0068] The embodiments described above are intended only to illustrate and teach one or more ways of practicing or implementing the present invention, not to restrict its breadth or scope. The actual scope of the invention, which embraces all ways of practicing or implementing the teachings of the invention, is defined only by the following claims and their equivalents.
 
, Claims:I/ We CLAIMS:
1. A propulsion system [100] for watercrafts, comprising:
a housing [102] configured to be attached with a watercraft via a fastening flange [112], wherein the housing [102] comprises:
an inner cavity machined to accommodate a motor assembly [200], wherein the motor assembly [200] is configured to provide rotations to a propeller attached with the motor assembly [200] to generate a propulsion force for the watercraft;
at least one cavitation plate [110] monolithic with the housing [102] and configured to prevent excess drag on the watercraft and damage to the propeller; and
at least one rudder fin [114] fabricated with the housing [102] and configured to reduce drag on the propeller by diving a fluid stream and enable proper navigation control over the watercraft.
2. The propulsion system [100] as claimed in claim 1, wherein the fastening flange [112] is configured to attach the housing [102] with the watercraft.

3. The propulsion system [100] as claimed in claim 1, further comprising a hollow pipe coupled between the fastening flange [112] and the watercraft, wherein the hollow pipe is configured to secure wires and electronics from environmental damage.

4. The propulsion system [100] as claimed in claim 1, wherein the housing [102] further comprising a front cover [104] configured to be fixed with a front end of the housing [102] via a rubber seal [212], wherein the front cover [104] is configured to prevent water to ingress inside the inner cavity of the housing [102] from the front end.

5. The propulsion system [100] as claimed in claim 1, wherein the housing [102] further comprising a back cover [106] configured to be fixed with a rear end of the housing [102] via another rubber seal [214], wherein the back cover [106] is configured to prevent water to ingress inside the inner cavity of the housing [102] from the rear end.

6. The propulsion system [100] as claimed in claim 1, wherein the motor assembly [200] further comprising:

a motor casing [202],
at least two plates [204] configured to be connected with the motor casing [202] through a plurality of bolts [206],
a stator disc [208] having one or more copper coils configured to receive a power supply and generate an electromagnetic field,
at least two rotor discs [210] having a plurality of permanent magnets [216], wherein the plurality of permanent magnets [216] are configured to generate a rotational force due to the generated electromagnetic field, and
at least one shaft [108] configured to rotate over a rotating axis.
7. The propulsion system [100] as claimed in claim 6, wherein the at least one shaft [108] is configured to be connected with the propeller.

8. The propulsion system [100] as claimed in claim 1, wherein the watercraft comprises at least one of a boat, vessels, submarines,


9. A method [700] for operating the propulsion system [100] as claimed in claim 1, wherein the method [700] comprising:

attaching, via a fastening flange [112], a housing [102] configured to be attached with a watercraft, wherein the housing [102] comprises:
an inner cavity machined to accommodate a motor assembly [200], wherein the motor assembly [200] is configured to provide rotations to a propeller attached with the motor assembly [200] to generate a propulsion force for the watercraft;
monolithically attaching at least one cavitation plate [110] with the housing [102] and preventing, via the at least one cavitation plate [110], excess drag on the watercraft and damage to the propeller; and
fabricating at least one rudder fin [114] with the housing [102] and reducing, via the at least one rudder fin [114], drag on the propeller by diving a fluid stream and enable proper navigation control over the watercraft.
10. The method [700] for operating the propulsion system [100] as claimed in claim 9, wherein the motor assembly [200] is connected with the back cover [106] via the plurality of bolts [206].

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