DESC:STATOR ASSEMBLY FOR HYBRID MOTOR
CROSS REFERENCE TO RELATED APPLICTIONS
The present application claims priority from Indian Provisional Patent Application No. 202221049852 filed on 31/08/2022, the entirety of which is incorporated herein by a reference.
TECHNICAL FIELD
Generally, the present disclosure relates to a stator assembly for a motor. Particularly, the present disclosure relates to a stator assembly for a hybrid flux motor of an electric vehicle.
BACKGROUND
Recently, electric vehicles have emerged as an alternative to conventional vehicles using gasoline diesel, and similar fossil fuels. Electric vehicles require traction motors to convert the electrical energy into mechanical energy for driving the vehicle. There are multiple types of electric motors being used in electric vehicles. Some known types of electrical motors are radial flux motors and axial flux motors. The radial flux motors are more commonly used as they are known for a longer time, however, radial flux motors have limitations such as longer axial length, low power and torque density, and higher losses and weight.
The axial flux motors overcome these limitations, because, in the axial flux motor, the direction of the lines of magnetic flux that are cut during the operation of the motor is parallel to the rotational axis of the motor. The axial flux motors have characteristics including small axial length, higher power and torque density, lesser losses, and lesser weight compared to radial flux motors.
The axial flux motor comprises a stator having a plurality of wound core teeth or stator assemblies arranged circumferentially. The wound core tooth comprises a bobbin, a core, and conductors wound over the bobbin. However, the stator of the axial flux motor is difficult to assemble. Moreover, the power density is limited by the size and weight of the motor. Furthermore, the axial flux motors have thermal issues and suffer lower efficiency at high speeds. To overcome the limitations of the radial flux motors and the axial flux motors, hybrid flux motors have been developed as a solution combining the advantages of the radial flux motors and the axial flux motors. However, the stator design of the hybrid flux motors is highly complex. Moreover, the stator assembly of the hybrid flux motors is difficult to assemble due to the complex structure of the wound core teeth. Specifically, it is difficult to secure the wound core teeth together to form the stator assembly. Consequently, the stator assembly of the hybrid flux motor suffers reduced flux utilization, and increased noise and vibrations. Such problems might even lead to motor failure in some cases.
Therefore, there exists a need for an improved stator assembly for hybrid flux motors that overcomes one or more problems associated with the conventional stator assemblies of the hybrid flux motors as set forth above.
SUMMARY
An object of the present disclosure is to provide a stator assembly for a hybrid flux motor of an electric vehicle with increased efficiency and power density.
In accordance with an aspect of the present disclosure, there is provided a stator assembly for a hybrid flux motor of an electric vehicle, wherein the stator assembly comprises a stationary motor shaft, a plurality of hollow stator teeth, a plurality of wound core bobbins accommodated within the plurality of hollow stator teeth, a locking ring for securing the plurality of hollow stator teeth and the plurality of wound core bobbins to form a stator structure, and a locking disc for securely mounting the stator structure on the stationary motor shaft.
The present disclosure provides a stator assembly capable of providing improved efficiency and power density in the hybrid flux motor. Advantageously, the present invention provides an easy to assemble and disassemble stator assembly for the hybrid flux motor. Furthermore, the stator assembly has lower non-flux weight i.e., low weight of components that are not generating any flux, resulting in increased power density and efficiency. Furthermore, the stator assembly is capable of directing hybrid magnetic flux, i.e., magnetic flux in both radial and axial directions. Beneficially, the stator assembly is capable of directing the magnetic flux in all four possible directions comprising radially inward, radially outward, and mutually opposite axial directions. Advantageously, the stator assembly is cost-efficient in manufacturing, servicing, and maintenance. Beneficially, the stator assembly enables efficient utilization of the space inside the hybrid flux motor resulting in compact size of the hybrid flux motor despite increased power density. Beneficially, the stator assembly is suitable for high-power applications such as use in the powertrain of the electric vehicle. Beneficially, the stator assembly is advantageous in terms of reducing flux leakage and maximizing flux utilization resulting in higher power density and efficiency of the hybrid motor. Beneficially, the stator assembly is advantageous in terms of reducing vibrations in the hybrid flux motor.
Additional aspects, advantages, features, and objects of the present disclosure would be made apparent from the drawings and the detailed description of the illustrative embodiments constructed in conjunction with the appended claims that follow.
It will be appreciated that features of the present disclosure are susceptible to being combined in various combinations without departing from the scope of the present disclosure as defined by the appended claims.
BRIEF DESCRIPTION OF DRAWINGS
The summary above, as well as the following detailed description of illustrative embodiments, is better understood when read in conjunction with the appended drawings. For the purpose of illustrating the present disclosure, exemplary constructions of the disclosure are shown in the drawings. However, the present disclosure is not limited to specific methods and instrumentalities disclosed herein. Moreover, those in the art will understand that the drawings are not to scale. Wherever possible, like elements have been indicated by identical numbers.
Embodiments of the present disclosure will now be described, by way of example only, with reference to the following diagrams wherein:
Figure 1 illustrates an exploded view of a stator assembly for a hybrid flux motor of an electric vehicle, in accordance with an embodiment of the present disclosure.
Figure 2 illustrates an exploded view of a tooth assembly of stator assembly for a hybrid flux motor of an electric vehicle, in accordance with another embodiment of the present disclosure.
In the accompanying drawings, an underlined number is employed to represent an item over which the underlined number is positioned or an item to which the underlined number is adjacent. A non-underlined number relates to an item identified by a line linking the non-underlined number to the item. When a number is non-underlined and accompanied by an associated arrow, the non-underlined number is used to identify a general item at which the arrow is pointing.
DETAILED DESCRIPTION
The following detailed description illustrates embodiments of the present disclosure and ways in which they can be implemented. Although some modes of carrying out the present disclosure have been disclosed, those skilled in the art would recognise that other embodiments for carrying out or practicing the present disclosure are also possible.
The description set forth below in connection with the appended drawings is intended as a description of certain embodiments of a stator assembly for a hybrid flux motor and is not intended to represent the only forms that may be developed or utilized. The description sets forth the various structures and/or functions in connection with the illustrated embodiments; however, it is to be understood that the disclosed embodiments are merely exemplary of the disclosure that may be embodied in various and alternative forms. The figures are not necessarily to scale; some features may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to employ the present invention variously.
While the disclosure is susceptible to various modifications and alternative forms, specific embodiment thereof has been shown by way of example in the drawings and will be described in detail below. It should be understood, however, that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternatives falling within the scope of the disclosure.
The terms “comprise”, “comprises”, “comprising”, “include(s)”, or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a setup, or system that comprises a list of components or steps does not include only those components or steps but may include other components or steps not expressly listed or inherent to such setup or system. In other words, one or more elements in a system or apparatus preceded by “comprises... a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or apparatus.
In the following detailed description of the embodiments of the disclosure, reference is made to the accompanying drawings which are shown by way of illustration-specific embodiments in which the disclosure may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the disclosure, and it is to be understood that other embodiments may be utilized and that changes may be made without departing from the scope of the present disclosure. The following description is, therefore, not to be taken in a limiting sense.
The present disclosure will be described herein below with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the description with unnecessary detail.
As used herein, the terms ‘electric vehicle’, ‘EV’, and ‘EVs’ are used interchangeably and refer to any vehicle having stored electrical energy, including the vehicle capable of being charged from an external electrical power source. This may include vehicles having batteries that are exclusively charged from an external power source, as well as hybrid vehicles which may include batteries capable of being at least partially recharged via an external power source. Additionally, it is to be understood that the ‘electric vehicle’ as used herein includes electric two-wheelers, electric three-wheelers, electric four-wheelers, electric pickup trucks, electric trucks, and so forth.
As used herein, the terms “electric motor”, “motor”, “hybrid motor”, “hybrid flux motor” and “radial-axial flux motor” are used interchangeably and refer to electric motors capable of being implemented in an industrial or automobile application, such as on the work machine or other vehicle. The hybrid flux motor is a type of electric motor that combines the radial and axial flux configurations. The hybrid flux motor comprises permanent magnets arranged radially around the stator and permanent magnets arranged axially along the stator. The hybrid flux motors combine the advantages of both radial and axial configurations, such as the high torque density of radial flux motors and the high efficiency of axial flux motors. The hybrid flux motor comprises a combination of axial flux rotors and radial flux rotors.
As used herein, the terms “stator” and “stator assembly” are used interchangeably and refer to the stationary part of a motor which provides a magnetic field that drives the rotors (the rotating component of the motor). The stator may act as a field magnet. The stator typically consists of a disc-shaped structure with coil windings. The coil windings, also called stator windings, are responsible for generating a magnetic field when electric current passes through them. The magnetic field produced by the stator interacts with the permanent magnets on the rotor to induce rotation.
As used herein, the terms “stationary motor shaft”, “motor shaft”, “shaft” and “stationary shaft” are used interchangeably and refer to a cylindrical component of the hybrid motor which is fixed in its position and the rest of the components are mounted on the same. The stationary motor shaft provides mechanical support to the components of the hybrid motor. It is to be understood that the stationary motor shaft is fixed on a mounting structure and the rotors deliver mechanical power to the mechanical load.
As used herein, the terms “plurality of hollow stator teeth”, “hollow stator teeth”, “stator teeth”, “wound core teeth”, and “teeth” are used interchangeably and refer to a component of the stator assembly that generates and shape the magnetic field and contributes to the motor’s performance. It is to be understood that multiple wound core teeth are arranged in a disc plane to form a segmented stator assembly of the hybrid flux motor. The hollow stator teeth are made of soft magnetic composite material suitable for the high-efficiency operation of the motor. The design and configuration of the wound core teeth, along with the stator windings, play a crucial role in the performance and efficiency of the hybrid flux motor. The hollow stator teeth contribute to the motor's ability to generate torque, provide smooth and reliable operation, and optimize power density.
As used herein, the terms “rotor” and “rotor assembly” are used interchangeably and refer to the rotating part of the motor which is typically made of iron or other magnetic materials. It contains the permanent magnets that generate the magnetic field used to drive the rotor. The rotor converts electrical energy supplied to the stator into mechanical energy.
As used herein, the terms “plurality of wound core bobbin”, “wound core bobbin”, and “bobbin” are used interchangeably and refer to spool-like structure on which the winding of the wire is done to form the flux coil and the bobbin wound with the coil is inserted into the hollow stator tooth. The bobbin may be made up of a non-conductive material that provides electrical insulation and mechanical stability. The bobbin may be specifically designed to hold the coil in place and maintain the desired shape and configuration.
As used herein, the term locking ring “locking ring” refers to a ring-like securing component that is used to hold the plurality of wound core bobbins and the plurality of hollow stator teeth together forming the stator assembly. The locking ring is beneficially designed to restrict the movement of the plurality of wound core bobbins and the plurality of hollow stator teeth in the stator structure. The locking ring may comprise a plurality of segments.
As used herein, the term “stator structure” refers to the assembly of a plurality of wound core bobbins and the plurality of hollow stator teeth using the locking ring. It is to be understood that the stator structure generates and guides the magnetic flux in the hybrid flux motor.
As used herein, the term “locking disc” refers to a component of the hybrid motor that is designed to securely hold the stator structure on the stationary motor shaft.
As used herein, the term “outward resting surface” refers to a surface projecting perpendicularly outward from the cylindrical surface of the stationary motor shaft. The outward resting surface provides mechanical support to the stator structure for secured mounting of the stator structure on the stationary motor shaft.
As used herein, the term “inward radial-flux surface” refers to a surface of the stator tooth that guides the magnetic flux in a radially inward direction.
As used herein, the term “outward radial-flux surface” refers to a surface of the stator tooth that guides the magnetic flux in a radially outward direction.
As used herein, the terms “pair of axial-flux surfaces” and “axial-flux surface” are used interchangeably and refer to a surface of the stator tooth that guides the magnetic flux in a mutually opposite axial direction.
As used herein, the terms “flux coil”, and “magnetic flux coil” are used interchangeably and refer to a coil of wire that is used to generate a magnetic field.
As used herein, the term “male formation” refers to a protruding design feature on one of the segments of the locking ring for securing one segment of the locking ring with each adjacent segment of the locking ring. As used herein, the term “cavity” refers to a recessed design feature on one of the segments of the locking ring for securing one segment of the locking ring with each adjacent segment of the locking ring.
As used herein, the term “locking groove” refers to a recessed design feature on the stator tooth for receiving a complimentary component of the locking disc for securely mounting the stator structure on the stationary motor shaft.
As used herein, the term “locking projection” refers to a protruding design feature on the edge of the locking disc for securely mounting the stator structure on the stationary motor shaft.
As used herein, the term “securing means” refers to a design feature on the locking disc for securing the locking disc on the stationary motor shaft.
Figure 1, in accordance with an embodiment, describes an exploded view of a stator assembly 100 for a hybrid flux motor of an electric vehicle, wherein the stator assembly comprises a stationary motor shaft 102, a plurality of hollow stator teeth 104, a plurality of wound core bobbins 106 accommodated within the plurality of hollow stator teeth 104, a locking ring 108 for securing the plurality of hollow stator teeth 104 and the plurality of wound core bobbins 106 to form a stator structure 110, and a locking disc 112 for securely mounting the stator structure 110 on the stationary motor shaft 102.
The present disclosure provides the stator assembly 100 capable of providing improved efficiency and power density in the hybrid flux motor. Advantageously, the present invention provides an easy to assemble and disassemble stator assembly 100 for the hybrid flux motor. Furthermore, the stator assembly 100 has lower non-flux weight i.e., low weight of components that are not generating any flux, resulting in increased power density and efficiency. Furthermore, the stator assembly 100 is capable of directing hybrid magnetic flux, i.e., magnetic flux in both radial and axial directions. Beneficially, the stator assembly 100 is capable of directing the magnetic flux in all four possible directions comprising radially inward, radially outward, and mutually opposite axial directions. Advantageously, the stator assembly 100 is cost-efficient in manufacturing, servicing, and maintenance. Beneficially, the stator assembly 100 enables efficient utilization of the space inside the hybrid flux motor resulting in compact size of the hybrid flux motor despite increased power density. Beneficially, the stator assembly 100 is suitable for high-power applications such as use in the powertrain of the electric vehicle. Beneficially, the stator assembly 100 is advantageous in terms of reducing flux leakage and maximizing flux utilization resulting in higher power density and efficiency of the hybrid motor. Beneficially, the stator assembly 100 is advantageous in terms of reducing vibrations in the hybrid flux motor.
In an embodiment, the stationary motor shaft 102 comprises a radially outward resting surface 102a along a cylindrical surface of the stationary motor shaft 102. In a specific embodiment, the radially outward resting surface 102a along a cylindrical surface of the stationary motor shaft 102 is located at a specific distance from one end of the stationary motor shaft 102. In an alternative embodiment, the radially outward resting surface 102a along a cylindrical surface of the stationary motor shaft 102 is located at any suitable distance from one end of the stationary motor shaft 102. It is to be understood that the radially outward resting surface 102a along a cylindrical surface of the stationary motor shaft 102 is designed according to dimensions of the stator structure 110.
In an embodiment, each hollow stator tooth of the plurality of hollow stator teeth 104 comprises an inward radial-flux surface 104a, an outward radial-flux surface 104b, and a pair of axial-flux surfaces 104c, 104d. It is to be understood that the inward radial-flux surface 104a guides radial flux generated by the wound core 106 in a radially inward direction towards the stationary motor shaft 102. Furthermore, it is to be understood that the outward radial-flux surface 104b guides the radial flux generated by the wound core 106 in a radially outward direction. Furthermore, it is to be understood that the pair of axial-flux surfaces 104c, 104d guides axial flux generated by the wound core 106 in mutually opposite axial directions. Beneficially, the plurality of hollow stator teeth 104 guides flux generated by the wound core 106 in all four possible directions for maximum utilization of the flux for generating mechanical output from the hybrid motor.
In an embodiment, the locking ring 108 comprises a plurality of segments, wherein each segment of the locking ring comprises a first end and a second end. Beneficially, the locking ring 108 secures the plurality of hollow stator teeth 104 and the plurality of wound core bobbins 106 together to form the stator structure 110. In a specific embodiment, the locking ring 108 comprises two segments. In another embodiment, the locking ring 108 comprises three segments. In yet another embodiment, the locking ring 108 comprises four segments. In yet another embodiment, the locking ring 108 comprises any suitable number of segments.
In an embodiment, the first end of the segment comprises a male formation 108a and the second end of the segment comprises a cavity 108b, and wherein the cavity 108b of the segment receives the male formation 108b of adjacent segment securing the plurality of segments together forming the locking ring 108. It is to be understood that the cavity 108b of each segment receives the male formation 108b of adjacent segment until the locking ring 108 is completely formed (closed). Beneficially, the male formation 108a of the segment locks into the cavity 108b to securely hold the plurality of segments forming the locking ring 108.
In an embodiment, each wound core bobbin of the plurality of wound core bobbins 106 comprises a flux coil 106a of a conductive material. Preferably, the flux coil 106a is made up of copper. Alternatively, the flux coil 106a is made up of any other suitable material. Beneficially, the flux coil 106a is wound firmly on the bobbin to avoid any movement of the flux coil 106a during the operation of the hybrid flux motor.
In an embodiment, each wound core bobbin 106 comprises a hole through centre of the wound core bobbin 106 for receiving the locking ring 108. Beneficially, shape of the hole conforms with the shape of the locking ring 108. More beneficially, the locking ring 108 is firmly received in the hole restricting any sideways movement of the locking ring 108 inside the hole to prevent any vibration in the stator structure 110, during the operation of the hybrid flux motor.
In an embodiment, the stator structure 110 is formed by inserting the plurality of segments of the locking ring 108 through the plurality of wound core bobbins 106 accommodated within the plurality of hollow stator teeth 104. It is to be understood that the plurality of wound core bobbins 106 snugly fits into the plurality of hollow stator teeth 104 to prevent any vibration in the stator structure 110, during the operation of the hybrid flux motor. Furthermore, it is to be understood that locking ring 108 securely holds the plurality of hollow stator teeth 104 (with the plurality of wound core bobbins 106) together to prevent any vibration in the stator structure 110, during the operation of the hybrid flux motor.
In an embodiment, each of the hollow stator tooth 104 comprises at least one locking groove 104e for secure mounting of the stator structure 110 on the stationary motor shaft 102. In another embodiment, the hollow stator tooth 104 comprises a plurality of locking groove 104e for secure mounting of the stator structure 110 on the stationary motor shaft 102. In yet another embodiment, the hollow stator tooth 104 comprises any suitable number of locking grooves 104e for secure mounting of the stator structure 110 on the stationary motor shaft 102. Beneficially, the locking grooves 104e are shaped in conformity with the corresponding locking mechanism to prevent any vibration in the stator structure 110, during the operation of the hybrid flux motor.
In an embodiment, the locking disc 112 comprises a plurality of locking projections 112a projecting from an edge of the locking disc 112, and wherein the locking projections 112a lock in the locking grooves 104e of the plurality of hollow stator teeth 104. Beneficially, the plurality of locking projections 112a are shaped in conformity with the locking grooves 104e to ensure secure locking of the locking projections 112a into the locking grooves 104e. Beneficially, such secure locking of the locking projections 112a into the locking grooves 104e prevents any vibration in the stator structure 110, during the operation of the hybrid flux motor.
In an embodiment, the locking disc 112 comprises at least one securing means 112b for securely mounting the locking disc 112 on the stationary motor shaft 102, along with the stator structure 110. It is to be understood that the at least one securing means 112b of the locking disc is a combination of suitable mechanical components that enables secure mounting of the locking disc 112 on the stationary motor shaft 102, along with the stator structure 110. In an embodiment, the at least one securing means 112b comprises holes and screws, nuts and bolts, holes and rivets, or a combination thereof. It is to be understood that the locking disc 112 is secured on the radially outward resting surface 102a along a cylindrical surface of the stationary motor shaft 102 to securely mount the stator structure 110 on the stationary motor shaft 102. Beneficially, such secure mounting of the stator structure 110 on the stationary motor shaft 102 prevents any vibration in the stator structure 110, during the operation of the hybrid flux motor.
In an embodiment, the plurality of locking projections 112a are made of magnetic material. It is to be understood that the plurality of locking projections 112a are inserted into the locking grooves 104e that are located on the flux guiding surface of the plurality of hollow stator tooth 104. Thus, beneficially, the plurality of locking projections 112a are made of magnetic material to maintain the maximum utilization of the magnetic flux and prevent any possible flux leakage.
Figure 2, in accordance with an embodiment, describes an exploded view of a tooth assembly 200 of the stator structure 110. The tooth assembly 200 comprises a hollow stator tooth 104 with a wound core bobbin 106 accommodated within. The wound core bobbin 106 comprises a flux coil 106a of a conductive material. A locking ring 108 is inserted through a hole in the wound core bobbin 106. A plurality of hollow stator tooth 104 with the wound core bobbin 106 accommodated within, is mounted on the locking ring 108 until the locking ring 108 is complete and occupied with the tooth assembly 200 to form the stator structure 110.
In an embodiment, the stator assembly comprises a stationary motor shaft 102, a plurality of hollow stator teeth 104, a plurality of wound core bobbins 106 accommodated within the plurality of hollow stator teeth 104, a locking ring 108 for securing the plurality of hollow stator teeth 104 and the plurality of wound core bobbins 106 to form a stator structure 110, and a locking disc 112 for securely mounting the stator structure 110 on the stationary motor shaft 102. Furthermore, the stationary motor shaft 102 comprises a radially outward resting surface 102a along a cylindrical surface of the stationary motor shaft 102. Furthermore, each hollow stator tooth of the plurality of hollow stator teeth 104 comprises an inward radial-flux surface 104a, an outward radial-flux surface 104b, and a pair of axial-flux surfaces 104c, 104d. Furthermore, the locking ring 108 comprises a plurality of segments, wherein each segment of the locking ring comprises a first end and a second end. Furthermore, the first end of the segment comprises a male formation 108a and the second end of the segment comprises a cavity 108b, and wherein the cavity 108b of the segment receives the male formation 108b of adjacent segment securing the plurality of segments together forming the locking ring 108. Furthermore, each wound core bobbin of the plurality of wound core bobbins 106 comprises a flux coil 106a of a conductive material. Furthermore, each wound core bobbin 106 comprises a hole through centre of the wound core bobbin 106 for receiving the locking ring 108. Furthermore, the stator structure 110 is formed by inserting the plurality of segments of the locking ring 108 through the plurality of wound core bobbins 106 accommodated within the plurality of hollow stator teeth 104. Furthermore, each of the hollow stator tooth 104 comprises at least one locking groove 104e for secure mounting of the stator structure 110 on the stationary motor shaft 102. Furthermore, the locking disc 112 comprises a plurality of locking projections 112a projecting from an edge of the locking disc 112, and wherein the locking projections 112a lock in the locking grooves 104e of the plurality of hollow stator teeth 104. Furthermore, the locking disc 112 comprises at least one securing means 112b for securely mounting the locking disc 112 on the stationary motor shaft 102, along with the stator structure 110. Furthermore, the plurality of locking projections 112a are made of magnetic material.
In the description of the present invention, it is also to be noted that, unless otherwise explicitly specified or limited, the terms “disposed,” “mounted,” and “connected” are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected, either mechanically or electrically. They may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Modifications to embodiments and combinations of different embodiments of the present disclosure described in the foregoing are possible without departing from the scope of the present disclosure as defined by the accompanying claims. Expressions such as “including”, “comprising”, “incorporating”, “have”, and “is” used to describe and claim the present disclosure are intended to be construed in a non-exclusive manner, namely allowing for items, components or elements not explicitly described also to be present. Reference to the singular is also to be construed to relate to the plural where appropriate.
Although embodiments have been described with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More particularly, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the present disclosure, the drawings, and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art.

,CLAIMS:WE CLAIM:
1. A stator assembly (100) for a hybrid flux motor of an electric vehicle, wherein the stator assembly comprises:
- a stationary motor shaft (102);
- a plurality of hollow stator teeth (104);
- a plurality of wound core bobbins (106) accommodated within the plurality of hollow stator teeth (104);
- a locking ring (108) for securing the plurality of hollow stator teeth (104) and the plurality of wound core bobbins (106) to form a stator structure (110); and
- a locking disc (112) for securely mounting the stator structure (110) on the stationary motor shaft (102).
2. The stator assembly (100) as claimed in claim 1, wherein the stationary motor shaft (102) comprises a radially outward resting surface (102a) along a cylindrical surface of the stationary motor shaft (102).
3. The stator assembly (100) as claimed in claim 1, wherein each hollow stator tooth of the plurality of hollow stator teeth (104) comprises: an inward radial-flux surface (104a), an outward radial-flux surface (104b), and a pair of axial-flux surfaces (104c, 104d).
4. The stator assembly (100) as claimed in claim 1, wherein the locking ring (108) comprises a plurality of segments, wherein each segment of the locking ring comprises a first end and a second end.
5. The stator assembly (100) as claimed in claim 4, wherein the first end of the segment comprises a male formation (108a) and the second end of the segment comprises a cavity (108b), and wherein the cavity (108b) of the segment receives the male formation (108b) of adjacent segment securing the plurality of segments together forming the locking ring (108).
6. The stator assembly (100) as claimed in claim 1, wherein each wound core bobbin of the plurality of wound core bobbins (106) comprises a flux coil (106a) of a conductive material.
7. The stator assembly (100) as claimed in any of the claims 1 and 6, wherein each wound core bobbin (106) comprises a hole through centre of the wound core bobbin (106) for receiving the locking ring (108).
8. The stator assembly (100) as claimed in any of the claims 1, 6 and 7, wherein the stator structure (110) is formed by inserting the plurality of segments of the locking ring (108) through the plurality of wound core bobbins (106) accommodated within the plurality of hollow stator teeth (104).
9. The stator assembly (100) as claimed in claim 1, wherein each of the hollow stator tooth (104) comprises at least one locking groove (104e) for secure mounting of the stator structure (110) on the stationary motor shaft (102).
10. The stator assembly (100) as claimed in any of the claims 1 and 9, wherein the locking disc (112) comprises a plurality of locking projections (112a) projecting from an edge of the locking disc (112), and wherein the locking projections (112a) locks in the locking grooves (104e) of the plurality of hollow stator teeth (104).
11. The stator assembly (100) as claimed in any of the claims 1, 9 and 10, wherein the locking disc (112) comprises at least one securing means (112b) for securely mounting the locking disc (112) on the stationary motor shaft (102), along with the stator structure (110).
12. The stator assembly (100) as claimed in claim 10, wherein the plurality of locking projections (112a) are made of magnetic material.