DESC:END-COVER INTEGRATED MOTOR
CROSS REFERENCE TO RELATED APPLICTIONS
The present application claims priority from Indian Provisional Patent Application No. 202321075055 filed on 03/11/2023, the entirety of which is incorporated herein by a reference.
TECHNICAL FIELD
Generally, the present disclosure relates to an electric motor for electric vehicle. Particularly, the present disclosure relates to a motor casing of the electric motor.
BACKGROUND
Recently, traction motors are increasingly being used due to adoption of electric vehicles. AC motors are one of the good options to serve as traction motor in electric vehicles due to their high performance and efficiency.
Generally, the AC motors are used in various high-power applications such as electric vehicles. It is to be understood that the motors used in the automobile application are highly power dense and have multiple mechanical components including a stator assembly, a rotor assembly, a casing. Due to presence of multiple mechanical components, each with their own sub-components, significantly increases the complexity of manufacturing and assembly processes. Such complex assembly process of the electric motors increases the difficulty of service and maintenance of the motors. Particularly, disassembly and re-assembly of the motor are tedious due to the complex construction. It is to be understood that the disassembly of the motor may cause issues with the sealings used in the assembly of the motor. Furthermore, it may be any misalignment or incorrect placement of the sub-components during reassembly may lead to improper functioning or mechanical damage of the motor and/or components of the motor. Furthermore, the existing assemblies of the motors may require whole motor casing to be disassembled for physically accessing any of the sub-components of the motor. This may limit accessibility for diagnostics, repairs, and maintenance of the motor. Furthermore, if an electronic components enclosed inside the motor fails or needs recalibration, accessing the electronic components might necessitate partial or complete disassembly of the motor which leads to increased downtime and maintenance costs. Also, the current casing structure of electric motors provide protection to the electronic components but poses significant challenges in terms making routine maintenance or troubleshooting. Furthermore, the dense packing of components in electric motor may limit design flexibility, thereby difficult to upgrade or replace parts without redesigning the entire system of the motor.
Thus, there is a need of an improved motor design that overcomes the one or more problems as set forth above.
SUMMARY
An object of the present disclosure is to provide an electric motor of electric vehicle.
Another object of the present disclosure is to provide a motor casing of electric motor.
In accordance with an aspect of present disclosure there is provided an electric motor for an electric vehicle. The motor comprising a rotor assembly, a stator assembly, a position sensor and a motor casing. The motor casing comprises a cylindrical section configured to radially enclose the stator assembly and the rotor assembly, a front-end cover integrated in the cylindrical section of the motor casing configured to house the position sensor, a front-end cap configured to enclose the position sensor inside the front-end cover, a rear-end cover and a rear-end cap.
The present disclosure provides an electric motor. The electric motor as disclosed by present disclosure is advantageous in terms of providing an integrated structure for electronic components. The motor as disclosed by present disclosure is advantageous in terms of providing maintenance, accessibility, and operational efficiency of the electronic components. Furthermore, the motor as disclosed by present disclosure is beneficially configured to access the electronic component without disassembling the entire motor casing. Furthermore, the motor as disclosed by present disclosure advantageously reduces downtime during maintenance or repairs, as technicians directly access the electronic components from outside of motor casing. Beneficially, the maintenance of the electronic components becomes faster and less labour-intensive, thereby significantly cutting operational costs and improving the motor uptime. Additionally, the motor as disclosed by present disclosure is advantageous in terms of the accessibility of failed components without disturbing other critical motor components such as the rotor assembly, stator assembly, or shaft. Furthermore, the motor as disclosed by present disclosure is beneficially improves maintenance accessibility, reduces wear and tear from internal conditions of motor casing, thereby making the motor more efficient, reliable, and easier to service.
In accordance with another aspect of present disclosure there is provided a motor casing for an electric motor. The motor casing comprises a cylindrical section, a front-end cover, a front-end cap, a rear-end cover, and a rear-end cap. The cylindrical section is configured to radially enclose a stator assembly and a rotor assembly of the motor. The front-end cover is integrated in the cylindrical section of the motor casing configured to house a position sensor of the motor. The front-end cap is configured to enclose the position sensor inside the front-end cover.
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 an electric motor, in accordance with an embodiment of the present disclosure.
Figure 2 illustrates an exploded view of a motor casing of an electric motor, 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 practising 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 an electric motor of electric vehicle and is not intended to represent the only forms that may be developed or utilised. 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 minimised 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 variously employ the present invention.
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.
As used herein, the terms “comprise”, “comprises”, “comprising”, “include(s)”, or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a setup, 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, and 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 motor”, “motor”, “AC motor” are used interchangeably and refer to electric motors capable of being implemented in an industrial and automobile application for high torque operations. In general, the electric motor converts electrical energy into mechanical energy through the interaction of magnetic fields, typically involving a rotor and stator assembly. The electric motor may operate on various principles, including but not limited to induction, synchronous, reluctance or synchronous reluctance mechanisms.
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 which 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-wheeler, electric three-wheeler, electric four-wheeler, electric pickup trucks, electric trucks and so forth.
As used herein, the terms “rotor assembly” and “rotor” are used interchangeably and refer to a rotating part of the motor which converts electrical energy supplied to the stator into mechanical energy. The rotor assembly may contain permanent magnets and reluctance core that generate the magnetic field used to drive the rotor. The rotor assembly may generate magnetic torque, reluctance torque or a combination thereof.
As used herein, the terms “rotor shaft” refers to a power output mechanism of the motor, which transmits mechanical power to a load. The rotor shaft is the central component of a motor that supports and transmits the rotational motion generated by the rotor. The rotor shaft connects the rotor to external mechanical systems, allowing the transfer of torque. The rotor shaft may be composed of various materials, including but not limited to steel, aluminium, or composite materials.
As used herein, the term “stator assembly” and “stator” are used interchangeably and refer to a stationary component of the electric motor that houses the winding or permanent magnets and interacts with the rotor to create electromagnetic force or generate electrical power. The stator typically comprises a core made of laminated steel to reduce eddy current losses and may include slots or teeth to accommodate windings. The stator may also include insulation layers, cooling channels, and other structural features to enhance its mechanical robustness, thermal management, and electrical performance. While the stator is generally fixed in place, its design may allow for various mounting configurations and structural adaptations depending on the specific application of the motor.
As used herein, the term “motor casing” refers to a protective enclosure designed to encase the motor, providing structural integrity, environmental shielding, and thermal management for the internal components. The motor casing serves to protect the motor from external elements such as dust, moisture, and mechanical impact, while also facilitating heat dissipation through specific design features like fins or integrated cooling channels. The motor casing may include various access points for mounting, wiring, and maintenance. The motor casing may be made of materials such as aluminium alloys, steel, or composite materials. Such construction may ensure both mechanical protection and thermal efficiency during operation.
As used herein, the terms “cylindrical section” refers to a hollow, cylinder-shaped enclosure of the motor casing designed to house and protect the motor's internal components such as rotor assembly and stator assembly. The cylindrical casing provides structural support, ensures proper alignment of the motor parts, and safeguards against environmental factors like dust and moisture. The casing may include mounting points, ventilation features, or integration points for cooling systems. The cylindrical section may be enclosed with the front-end cover and rear end cover to enclose the motor components in axial direction.
As used herein, the terms “front-end cover” refers to a protective enclosure connected with the cylindrical section of the motor casing in axial direction along the motor shaft side. The front-end cover shields internal components such as bearings and the rotor from external contaminants, while also providing structural support to the motor casing. Additionally, the front-end cover aids in aligning and securing the motor shaft, ensuring smooth rotation and operation.
As used herein, the terms “rear-end cover” refers to a structural component designed to enclose and protect the rear section of an electric motor. The rear-end cover shields internal components such as bearings and the rotor from external contaminants, while also providing structural support to the cylindrical section of the motor casing from rear end. Additionally, the rear end cover aids in aligning and securing the motor shaft, ensuring smooth rotation and operation. The rear end cover design may also facilitate thermal management by incorporating cooling features or vents, contributing to efficient motor performance and longevity.
As used herein, the term “front-end cap” refers to a cap provided upon the front-end cover which provides environmental protection for the external arrangement of the electronic component integrated with the motor. The front-end cap is configured to securely enclose and shield the electronic component from external elements, such as moisture, dust, and mechanical impacts, thereby ensuring reliable operation and longevity. Additionally, the front-end cap eases the operational maintenance and accessibility of electronic component.
As used herein, the term “rear-end cap” refers to a cap provided upon the rear-end cover which provides environmental protection for the motor arrangement. The rear-end cap is configured to securely enclose and shield the cooling structure of the motor from external elements, such as moisture, dust, and mechanical impacts, thereby ensuring reliable operation and longevity. Additionally, the rear end cap eases the accessibility of the cooling arrangement.
As used herein, the term “position sensor” refers to a device to detect and measure the rotational or linear position of the motor shaft or rotor. The position sensor operates by converting mechanical movement into an electrical signal, which is then transmitted to a control system for monitoring and adjustment purposes. Typically, the position sensor works through magnetic, optical, or capacitive mechanisms, ensuring precise tracking of the motor’s position. The position sensor’s primary role is to provide real-time feedback to improve motor performance, efficiency, and accuracy in electric motors and automated systems.
As used herein, the term “plurality of rubber seals” refers to sealing elements that are designed to provide airtight or fluid-tight barriers between components or assemblies of electric motor. The plurality of rubber seals may vary in shape, size, or configuration, depending on the application, but collectively serve to prevent the leakage of gases, liquids, or contaminants. The plurality of seals may be strategically positioned at multiple interfaces to enhance the overall sealing performance, thereby ensures the reliability and durability of the electric motor.
As used herein, the term “position sensor compartment” refers to a designated enclosed space upon front-end cover designed to accommodate and protect the position sensor. The position sensor compartment may be integrated as part of the motor's structural design to ensure accurate sensor placement and shielding from external environmental factors such as dust, moisture, and mechanical impacts. The position sensor, housed in the compartment, provides precise feedback on the rotor's position, enabling efficient control of motor operation.
As used herein, the terms “a cooling arrangement” refers to a system designed to regulate the temperature of the motor components during operation, ensuring optimal performance and preventing overheating. The cooling arrangement typically consists of fluid or air-based cooling mechanisms, such as cooling ducts, heat exchangers, fans, or liquid coolant circulation systems. The cooling arrangement may be integrated within the motor housing or applied externally, directing cooling medium to critical areas such as the stator, rotor, and windings.
As used herein, the term “at least one component of the cooling arrangement” refers to the element designed to enable flow of coolant in the motor assembly. The at least one component could encompass various cooling mechanisms, such as a cooling jet or hollow helical cooling pipe etc. The at least one component of the cooling arrangement which provides a pathway for coolant fluid to enter the motor casing.
As used herein, the term “at least one terminal box” refers to an enclosed compartment integrated into or attached to the motor casing, designed to house and protect the electrical connections of the motor. The terminal box serves as a secure location where external power supply lines and internal motor wiring can be connected, facilitating the transmission of electrical power to the motor components. The terminal box typically includes one or more openings for conduit or cable entry and may be equipped with terminals for safe and organized connection of wires. The terminal box ensures that electrical connections are shielded from environmental factors such as dust, moisture, or mechanical damage, thus enhancing the motor's durability and operational safety.
As used herein, the term “at least one mounting point” refers to a designated structural feature integrated into the motor casing that serves to facilitate the secure attachment of the motor to a support structure, chassis, or other external framework. The at least one mounting point may take various forms, such as threaded holes, brackets, flanges, or lugs, and is designed to accommodate fasteners like bolts, screws, or other mechanical securing devices.
As used herein, the term “a hollow helical jet pipe” refers to a cooling component designed as a tubular structure with a helical spiral shape, positioned within or integrated into the rear end cover of the motor casing. The hollow helical jet pipe allows coolant (such as air, liquid, or gas) to flow through pipe. The helical shape ensures the coolant is distributed across the motor, improving heat dissipation by increasing the surface area in contact with the coolant. The jet pipe may include one or more nozzles or outlets to direct the flow of coolant towards specific motor components, thereby enhance thermal management and extending motor life by preventing overheating.
Figure 1, in accordance with an embodiment describes an electric motor 100 for an electric vehicle. The motor 100 comprising a rotor assembly 102, a stator assembly 104, a position sensor 106 and a motor casing 108. The motor casing 108 comprises a cylindrical section 110 configured to radially enclose the stator assembly 104 and the rotor assembly 102, a front-end cover 112 integrated in the cylindrical section 110 of the motor casing 108 configured to house the position sensor 106, a front-end cap 114 configured to enclose the position sensor 106 inside the front-end cover 112, a rear-end cover 116 and a rear-end cap 118.
The present disclosure provides a motor casing 108 for electric motor 100. The motor casing 108 as disclosed by present disclosure is advantageous in terms of providing a front-end cap 114 on the position sensor compartment 124 which is removably mounted on the position sensor compartment 124. The removably mounted front-end cap 114 for the position sensor compartment 124 as disclosed by present disclosure is advantageous in terms of maintenance, accessibility, and operational efficiency of the position sensor 106. Beneficially, the front-end cap 114 is configured to access the position sensor 106 without disassembling the entire motor casing 108. Beneficially, the front-end cap 114 reduces downtime during maintenance or repairs, as technicians directly access electronic components such as sensors, encoders, and circuit boards outside of motor casing 108. Beneficially, the maintenance of the position sensor 106 becomes faster and less labour-intensive, thereby significantly cutting operational costs and improving the motor uptime. Additionally, the electronic components of present disclosure are conveniently accessed without disturbing other critical mechanical motor components such as the rotor assembly 102 and stator assembly 104. Beneficially, the convenient accessibility of position sensor compartment 124 allows easier replacement of the electronic components of the motor 100. Moreover, such placement of the position sensor 106 beneficially reduces signal interference and improves the reliability of the position sensor 106. Overall, the front-end cap 114 beneficially improves maintenance accessibility, reduces wear and tear from internal conditions of motor 100, thereby making the motor 100 more efficient, reliable, and easier to service.
In an embodiment, the rotor assembly 102 comprises a rotor shaft 102a configured to deliver torque output to a mechanical load. The rotor shaft 102a is designed to rotate within the motor casing 108, translating the rotational motion generated by the interaction of magnetic fields into usable mechanical energy. The rotor shaft 102a configuration allows the rotor assembly 102 to effectively transmit torque to various connected loads, such as gears, pulleys, or direct-drive applications of electric vehicle, thereby ensures reliable performance across a range of operating conditions. Beneficially, the rotor shaft 102a may be constructed from high-strength materials to withstand operational stresses and minimize deformation during torque delivery, thereby enhancing the durability and longevity of the motor 100.
In an embodiment, at least one of the cylindrical section 110, the front-end cap 114, the rear-end cover 116, and the rear-end cap 118 are sealed together with a plurality of rubber seals 120 to form the motor casing 108. The motor casing components as set forth above are securely sealed together using the plurality of rubber seals 120. Such plurality of rubber seals 120 beneficially provides effective insulation against environmental factors such as moisture, dust, and contaminants. The use of plurality of rubber seals 120 ensures prevention of ingress of external elements inside the motor casing 108 that may potentially affect motor performance and longevity.
In an embodiment, the cylindrical section 110 comprises at least one terminal box 122. The at least one terminal box 122 serves as an essential interface for electrical connections, facilitating the secure and efficient transmission of electrical power to and from the motor 100. The design of the at least one terminal box 122 is integrated within the cylindrical section 110, thereby ensures minimal disruption to the overall structural integrity and aesthetics of the motor 100. Beneficially, the at least one terminal box 122 may be configured to accommodate multiple electrical terminals which may significantly allow for various connection configurations depending on the application requirements. Furthermore, the at least one terminal box 122 may be designed to provide environmental protection for the connections, safeguarding electrical connections from dust, moisture, and other potential contaminants.
In an embodiment, the front-end cover 112 comprises a position sensor compartment 124 to house the position sensor 106. The position sensor compartment 124 is specifically designed to accommodate the position sensor 106, which is essential for monitoring the angular position or rotational movement of the rotor shaft 102a. Beneficially, the incorporation of the position sensor compartment 124 within the front-end cover 112 enhances the accessibility and overall structural integrity and compactness of the motor 100. The position sensor compartment 124 ensures the position sensor 106 is securely housed and protected from external environmental factors. Additionally, the position sensor compartment 124 also facilitates easy access for maintenance or replacement of the position sensor 106, thereby improving the motor's operational efficiency and longevity.
In an embodiment, the front-end cap 114 is configured to be removably mounted on the position sensor compartment 124 to securely enclose the position sensor 106 inside the position sensor compartment 124 of the front-end cover 112. Beneficially the front-end cap 114 facilitates secure enclosure of the position sensor 106 within the position sensor compartment 124. The removable nature of the front-end cap 114 allows easy access to the position sensor 106 for maintenance, inspection, or replacement, without disturbing the mechanical components of the motor 100.
In an embodiment, the front-end cap 114 is removed to access the position sensor 106. The front-end cap 114 of the motor 100 allows for easy disassembly, facilitating maintenance and adjustment of the position sensor 106 without the need for complete motor disassembly. Beneficially, the position sensor 106 access through front-end cap 114 is crucial for optimizing the sensor's performance and enables calibration, repair, or replacement the position sensor 106 efficiently.
In an embodiment, the rear-end cover 116 is configured to house at least one component 126 of a cooling arrangement of the motor 100. The at least one component 126 of the cooling arrangement may comprise a hollow helical jet pipe to allow flow of a coolant through the motor shaft 102a from the cooling arrangement, wherein the hollow helical jet pipe is coaxial to the motor shaft and removably attached with the rear end cover 116. Beneficially, the hollow helical jet pipe ensures that the cooling arrangement enhances the overall thermal management of the motor 100 while maintaining a compact and efficient assembly. Additionally, the inclusion of the at least one cooling components within the rear-end cover 116 may facilitate easier maintenance and replacement.
In an embodiment, the rear-end cap 118 is configured to be removably mounted on the rear-end cover 116 to securely enclose the at least one component 126 of the cooling arrangement. The rear end cap 118 may be configured to allow for a secure enclosure of at least one component 126 of the cooling arrangement i.e. the hollow helical jet pipe, which may be integral to the motor's thermal management system.
In an embodiment, the cylindrical section 110, the front-end cover 112, the front-end cap 114, the rear-end cover 116 and the rear-end cap 118 may be fastened together via a plurality of fastening mechanisms 130.
In an embodiment, the motor casing 108 comprises at least one mounting point 128 for secure mounting of the motor 100. The motor casing 108 is equipped with at least one mounting point 128, strategically located to facilitate secure attachment of the motor 100 inside the electric vehicle. Beneficially, the design of the mounting point 128 may allow for compatibility with standard fastening hardware, enabling efficient installation and maintenance.
In an embodiment, the electric motor 100 for the electric vehicle is disclosed. The motor 100 comprising the rotor assembly 102, the stator assembly 104, the position sensor 106 and the motor casing 108. The motor casing 108 comprises the cylindrical section 110 configured to radially enclose the stator assembly 104 and the rotor assembly 102. The front-end cover 112 is integrated in the cylindrical section 110 of the motor casing 108 and configured to house the position sensor 106. The front-end cap 114 is configured to enclose the position sensor 106 inside the front-end cover 112. The motor casing 108 comprises the rear-end cover 116 and the rear-end cap 118. Furthermore, the rotor assembly 102 comprises the rotor shaft 102a configured to deliver torque output to a mechanical load. Furthermore, the at least one of the cylindrical section 110, the front-end cap 114, the rear-end cover 116, and the rear-end cap 118 are sealed together with the plurality of rubber seals 120 to form the motor casing 108. Furthermore, the cylindrical section 110 comprises the at least one terminal box 122. Furthermore, the front-end cover 112 comprises the position sensor compartment 124 to house the position sensor 106. Furthermore, the front-end cap 114 is configured to be removably mounted on the position sensor compartment 124 to securely enclose the position sensor 106 inside the position sensor compartment 124 of the front-end cover 112. Furthermore, the front-end cap 114 is removed to access the position sensor 106. Furthermore, the rear-end cover 116 is configured to house the at least one component 126 of the cooling arrangement of the motor 100. Furthermore, the rear-end cap 118 is configured to be removably mounted on the rear-end cover 116 to securely enclose the at least one component 126 of the cooling arrangement. Furthermore, the motor casing 108 comprises at least one mounting point 128 for secure mounting of the motor 100.
Figure 2, in accordance with another aspect describes a motor casing 108 for an electric motor 100. The motor casing 108 comprising a cylindrical section 110 configured to radially enclose a stator assembly 104 and a rotor assembly 102 of the motor 100. A front-end cover 112 integrated in the cylindrical section 110 of the motor casing 108 configured to house a position sensor 106 of the motor 100. The front-end cover 112 comprise a front-end cap 114 configured to enclose the position sensor 106 inside the front-end cover 112. The motor casing 108 further comprises a rear-end cover 116 and a rear-end cap 118. Beneficially, the front-end cap 114 securely encloses the position sensor 106 within the front-end cover 112, thereby protecting the position sensor 106 from external environmental factors and ensuring accurate readings during operation. Beneficially, the front-end cap 114 is configured to access the position sensor 106 without disassembling the entire motor casing 108. Beneficially, the front-end cap 114 reduces downtime during maintenance or repairs, as technicians may directly access electronic components such as sensors, encoders, and circuit boards outside of motor casing 108. Additionally, the motor casing 108 features a rear-end cover 116 and a rear-end cap 118 that collectively enhance the robustness of the motor 100 and prevent contamination from external debris.
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 combination 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”, “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. An electric motor (100) for an electric vehicle, the motor (100) comprising:
- a rotor assembly (102);
- a stator assembly (104);
- a position sensor (106); and
- a motor casing (108), wherein the motor casing (108) comprises:
- a cylindrical section (110) configured to radially enclose the stator assembly (104) and the rotor assembly (102);
- a front-end cover (112) integrated in the cylindrical section (110) of the motor casing (108) configured to house the position sensor (106);
- a front-end cap (114) configured to enclose the position sensor (106) inside the front-end cover (112);
- a rear-end cover (116); and
- a rear-end cap (118).
2. The motor (100) as claimed in claim 1, wherein the rotor assembly (102) comprises a rotor shaft (102a) configured to deliver torque output to a mechanical load.
3. The motor (100) as claimed in claim 1, wherein at least one of: the cylindrical section (110), the front-end cap (114), the rear-end cover (116), and the rear-end cap (118) are sealed together with a plurality of rubber seals (120) to form the motor casing (108).
4. The motor (100) as claimed in claim 1, wherein the cylindrical section (110) comprises at least one terminal box (122).
5. The motor (100) as claimed in claim 1, wherein the front-end cover (112) comprises a position sensor compartment (124) to house the position sensor (106).
6. The motor (100) as claimed in claim 5, wherein the front-end cap (114) is configured to be removably mounted on the position sensor compartment (124) to securely enclose the position sensor (106) inside the position sensor compartment (124) of the front-end cover (112).
7. The motor (100) as claimed in claim 6, wherein the front-end cap (114) is removed to access the position sensor (106).
8. The motor (100) as claimed in claim 1, wherein the rear-end cover (116) is configured to house at least one component (126) of a cooling arrangement of the motor (100).
9. The motor (100) as claimed in claim 1, wherein the rear-end cap (118) is configured to be removably mounted on the rear-end cover (116) to securely enclose the at least one component (126) of the cooling arrangement.
10. The motor (100) as claimed in claim 1, wherein the motor casing (108) comprises at least one mounting point (128) for secure mounting of the motor (100).
11. A motor casing (108) for an electric motor (100), the motor casing (108) comprising:
- a cylindrical section (110) configured to radially enclose a stator assembly (104) and a rotor assembly (102) of the motor (100);
- a front-end cover (112) integrated in the cylindrical section (110) of the motor casing (108) configured to house a position sensor (106) of the motor (100);
- a front-end cap (114) configured to enclose the position sensor (106) inside the front-end cover (112);
- a rear-end cover (116); and
- a rear-end cap (118).