Description:FIELD OF INVENTION
[0001]Embodiments of a present disclosure relates to a motor assembly, and more particularly to a unique design of stator assembly for unique placements of a Hall Effect sensor for the motor assembly for optimizing rotor-stator synchronization.
BACKGROUND
[0002]Commutation is a process of switching current in motor phases for facilitating a rotation of a motor. A commutator assembly performs the process of commutation in normal DC motors.
[0003]In brushless DC (BLDC) motors, a mechanical commutator and brushes are replaced by solid-state, magnetic field sensors. The need of said commutation process in the BLDC motor is to energize stator windings in a certain pattern and sequence, with one winding positive, one negative, and the third one turned off. The attraction and repulsion between the stator field and rotor permanent magnets produces torque. Maximum torque is produced when these two fields are oriented at 90 degrees to each other and diminishes, when they align.
[0004]In order to move the motor, a motor controller sends current through the stator windings and produces magnetic field which in turn develops the torque on the rotor, which in turn makes the rotor move. Hence, to keep the motor turning, the magnetic field of the stator should change position as the rotor field try to catch with it.
[0005]For energizing the correct stator winding, the rotor position must be known. The principle of operation of the BLDC motor is basically based on the rotor position feedback. A sensor is required to give the rotor position feedback to the motor controller when the rotor reaches the desired position. Thus, to gain rotor-stator synchronization, a position sensor is normally implemented. The position sensors is otherwise referred here as a Hall Effect sensor.
[0006]If the commutation is done faster or slower than the rotor speed, the magnets go out of synchronisation with the magnetic field of the stator. This causes the rotor to vibrate and may stop. After one commutation, the rotor position feedback with respect to the stator is must for initiating the next commutation. Hence, the position detection is also a crucial parameter.
[0007]The detection of commutation points of BLDC drives is done by both sensor-less schemes and position sensors. Usually, the zero-crossing points (ZCPs) of the back-electromotive forces (back EMFs) are identified to detect the commutation points in case of high speed BLDC sensor-less schemes. But said ZCP based sensor-less methods have limitations. At zero and low speed range, the back-EMFs are not high enough for accurate ZCP detection. Also, low-pass filters (LPFs) are needed in order to avoid false commutations. This will cause an inevitable LPF delay error.
[0008]Further, asymmetric machine parameters, non-ideal EMF shapes and armature reaction also have a negative influence on the ZCP detection accuracy. The flux linkage based sensorless scheme are also not suitable for high speed drives since flux linkage based sensorless scheme requires high sampling rate and heavy computation burden.
[0009]On the other hand, the Hall Effect sensors are also widely used in high speed BLDC drives due to advantages of simplicity and robustness in wide speed and load range. When the Hall Effect sensors are used, machine parameters, EMF waveform, and armature reaction have no effect on detected Hall signals. Also, the effect of LPFs is also neglected since there is no high frequency noise in the Hall signals. So, the hub motor uses the Hall Effect sensors to obtain commutation points.
[0010]The BLDC motors typically have three Hall Effect sensors mounted either to the stator or to the rotor and use what is known as six-step commutation. These Hall Effect sensors are placed 120 degree apart from each other, providing 0 to 360 degree angle position. When the rotor passes the Hall Effect sensor, the Hall Effect sensor produces either a high or a low signal to indicate which rotor pole (North or South) has passed. This switching of the three Hall Effect sensors (from high to low or from low to high) provides said rotor position information every 60 degrees.
[0011]In the six-step commutation, each of the three windings is either energized positive, negative, or off, depending on whether each of the three Hall Effect sensors has a high or a low state. As explained above, when the Hall Effect sensors come in contact with the magnetic field of the rotor, the Hall Effect sensor generates respective digital pulse in terms of 1 and 0, used to measure the motor’s position, which is communicated to the electronic controller to spin the motor at the right time and right orientation.
[0012]The said commutation conduction pattern of the inverter is very sensitive to the physical position of the Hall Effect sensors. Sensitivity level is based on the placement of the Hall Effect sensor to the magnet, the air gap, and magnet strength. Hence, misplacing the Hall Effect sensors will affect switching intervals of the inverter. The insufficiently precise positioning of the Hall Effect sensors causes unbalanced operation. Unbalanced Hall Effect sensors lead to unequal conduction intervals among the phases and subsequently undesirable low frequency harmonics in torque.
[0013]The said electromagnetic torque spectrum with low frequency components may stress mechanical parts of the drive system and generate electromagnetic noise. Misalignment of the Hall Effect sensors results in mal-operation of the voltage source inverter and lead to deterioration of the overall drive performance. The above said unbalancing among the phases leads to an increase in torque pulsation, vibration and audible noise. Ideally, in the 120° arrangement the hall signals consist of six sectors of electrical 60° spans, but misalignment in their position, the Hall outputs will be the combination of irregular sector duration. Manually adjusting the placements of the Hall Effect sensors could solve the problem. However, it is not practical for mass production.
[0014]Furthermore, the Hall Effect sensor works in harsh environment where high current, high temperature, and high vibration are existed. Those conditions result in some incorrect position detections. Those glitches, if not properly anticipated, will result in incorrect switching pattern. This could result either in inverter or motor damage and additional motor vibration. The phenomenon of uneven Hall signals itself is a grave problem which need to be addressed. Noisy Hall Effect based rotor position sensor could result in erratic switching pattern if not properly addressed.
[0015]Hence, there is a need for a unique design of a stator assembly for unique placement of a Hall Effect Sensor for a motor assembly and therefore address the aforementioned issues.
SUMMARY
[0016]In accordance with one embodiment of the disclosure, a stator assembly with a plurality of T-shaped slots for a plurality of Hall Effect sensors for optimizing rotor-stator synchronization, is disclosed. The stator assembly includes a plurality of slots and a plurality of Hall Effect sensors and a plurality of printed circuit boards (PCBs). The plurality of slots is arranged at an edge of an outer end of a stator segment along a circular outer surface of the stator segment, characterized in that each of the plurality of slots is arranged as a T-shaped slot in the stator assembly, characterized in that the plurality of slots comprises a plurality of grooves in which the plurality of Hall Effect sensors arranged with a plurality of printed circuit boards (PCBs), characterized in that an arrangement of each Hall Effect sensor on each PCB is fabricated to be structured as a T-shaped structure. The T-shaped structure including the arrangement of each Hall Effect sensor on each PCB that is inserted in each T-shaped slot of the plurality of T-shaped slots in the stator assembly.
[0017]Each Hall Effect sensor of the plurality of Hall Effect sensors is arranged at a top portion of the T-shaped structure, and each PCB of the plurality of PCBs is arranged at a bottom portion of the T-shaped structure, and characterized in that each Hall Effect sensor of the plurality of Hall Effect sensors is positioned in the plurality of T-shaped slots in the stator assembly, which adapts the Hall Effect sensor to generate accurate and noise-free Hall signals related to permanent magnetic field lines of a rotor at a predetermined angle to detect a position of the rotor in a motor assembly. The predetermined angle of the rotor is almost 90 degrees.
[0018]In an embodiment, the plurality of slots is stacked in the stator assembly using a stator stamping method implementing a suitable auto stitching mechanism.
[0019]In another embodiment, the plurality of Hall Effect sensors is properly arranged inside the plurality of slots of the stator segment, which adapts the plurality of Hall Effect sensors to be protected from at least one of: vibrations, misalignments, incorrect positions, slipping and sliding.
[0020]In yet another embodiment, the plurality of Hall Effect sensors is configured to generate the accurate and noise-free Hall signals related to the permanent magnetic field lines of the rotor when the plurality of Hall Effect sensors is in tranquil state in the motor assembly.
[0021]In yet another embodiment, the Hall signals related to the permanent magnetic field lines increase production of accurate and correct switching patterns for a plurality of stator windings.
[0022]In yet another embodiment, the plurality of T-shaped slots includes the plurality of grooves at a top portion of the T-shaped slots to insert each Hall Effect sensor mounted with each PCB.
[0023]To further clarify the advantages and features of the present disclosure, a more particular description of the disclosure will follow by reference to specific embodiments thereof, which are illustrated in the appended figures. It is to be appreciated that these figures depict only typical embodiments of the disclosure and are therefore not to be considered limiting in scope. The disclosure will be described and explained with additional specificity and detail with the appended figures.
BRIEF DESCRIPTION OF THE DRAWINGS
[0024]The disclosure will be described and explained with additional specificity and detail with the accompanying figures in which:
[0025]FIG. 1A is a schematic representation of a stator assembly including a plurality of slots in accordance with an embodiment of the present disclosure;
[0026]FIG. 1B is a detailed view of the plurality of slots for placing a plurality of Hall Effect sensors, such as those shown in FIG. 1A, in accordance with an embodiment of the present disclosure;
[0027]FIGS. 1C-1D are schematic representations depicting that the plurality of Hall Effect sensors with a plurality of printed circuit boards (PCBs) arranged in the plurality of slots in the stator assembly, such as those shown in FIG. 1A, in accordance with an embodiment of the present disclosure;
[0028]FIG. 1E is a detailed view of a Hall Effect sensor mounted on a printed circuit board (PCB), such as those shown in FIG. 1C, in accordance with an embodiment of the present disclosure;
[0029]FIG. 2A is a schematic representation of the stator assembly including the plurality of slots with unique placement of the plurality of Hall Effect sensors, such as those shown in FIG. 1B, in accordance with an embodiment of the present disclosure;
[0030]FIG. 2B is a top perspective view of the stator assembly including the plurality of slots, such as those shown in FIG. 1A, in accordance with an embodiment of the present disclosure;
[0031]FIG. 2C is a top view of a circular outer surface of a stator segment with the plurality of slots, such as those shown in FIG. 1A, in accordance with an embodiment of the present disclosure;
[0032]FIG. 2D is a detailed view of the top side of the grooved part of the T-shaped slot, such as those shown in FIG. 1B, in accordance with an embodiment of the present disclosure;
[0033]FIG. 2E is a detailed view of the grooved part of the T-shaped slot, such as those shown in FIG. 2B, in accordance with an embodiment of the present disclosure;
[0034]FIG. 3A is a schematic representation stator stacking, where the plurality of slots is stacked using a stator stamping method implementing a suitable auto stitching mechanism, in accordance with an embodiment of the present disclosure; and
[0035]FIG. 3B is a detailed view of the plurality of slots that is staked in the stator assembly, such as those shown in FIG. 3A, in accordance with an embodiment of the present disclosure;
[0036]Further, those skilled in the art will appreciate that elements in the figures are illustrated for simplicity and may not have necessarily been drawn to scale. Furthermore, in terms of the construction of the device, one or more components of the device may have been represented in the figures by conventional symbols, and the figures may show only those specific details that are pertinent to understanding the embodiments of the present disclosure so as not to obscure the figures with details that will be readily apparent to those skilled in the art having the benefit of the description herein.
DETAILED DESCRIPTION OF THE DRAWINGS
[0037]For the purpose of promoting an understanding of the principles of the disclosure, reference will now be made to the embodiment illustrated in the figures and specific language will be used to describe them. It will nevertheless be understood that no limitation of the scope of the disclosure is thereby intended. Such alterations and further modifications in the illustrated online platform, and such further applications of the principles of the disclosure as would normally occur to those skilled in the art are to be construed as being within the scope of the present disclosure.
[0038]The terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process or method that comprises a list of steps does not include only those steps but may include other steps not expressly listed or inherent to such a process or method. Similarly, one or more devices or subsystems or elements or structures or components preceded by "comprises... a" does not, without more constraints, preclude the existence of other devices, subsystems, elements, structures, components, additional devices, additional subsystems, additional elements, additional structures or additional components. Appearances of the phrase "in an embodiment", "in another embodiment" and similar language throughout this specification may, but not necessarily do, all refer to the same embodiment.
[0039]Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this disclosure belongs. The system, methods, and examples provided herein are only illustrative and not intended to be limiting.
[0040]In the following specification and the claims, reference will be made to a number of terms, which shall be defined to have the following meanings. The singular forms “a”, “an”, and “the” include plural references unless the context clearly dictates otherwise.
Definition:
[0041]Stator: A stator is the non-moving, fixed counterpart in a machine. Depending on the motor type and construction, the rotor or stator are designed as permanent magnets or copper windings.
[0042]Rotor: A rotor is the rotating part of a machine. In electrical motors or generators, the whole linear synchronously rotating part of the machine is termed the rotor.
[0043]Hall Effect sensor: A Hall Effect sensor (or Hall sensor) is a type of sensor which detects the presence and magnitude of a magnetic field using the Hall Effect. The output voltage of a Hall sensor is directly proportional to the strength of the field.
[0044]Printed Circuit Board (PCB): A printed circuit board, or PCB, is used to mechanically support and electrically connect electronic components using conductive pathways, tracks or signal traces etched from copper sheets laminated onto a non-conductive substrate.
[0045]FIG. 1A is a schematic representation of a stator assembly 100 including a plurality of slots 102 in accordance with an embodiment of the present disclosure. A motor assembly typically includes a stator and a rotor. The stator assembly 100 includes a plurality of slots 102. The plurality of slots 102 is grooved at an edge of an outer end of a stator segment along a circular outer surface of the stator segment. In an embodiment, each slot of the plurality of slots 102 is arranged as a T-shaped slot in the stator assembly 100. In an embodiment, the motor assembly may be a Brushless Direct Current (BLDC) hub motor assembly.
[0046]FIG. 1B is a detailed view 102A of the plurality of slots 102 for placing a plurality of Hall Effect sensors, such as those shown in FIG. 1A, in accordance with an embodiment of the present disclosure. The plurality of slots 102 is grooved at the edge of the outer end to place the plurality of Hall Effect sensors (shown in FIGS. 1C-1D). Each slot of the plurality of slots 102 is arranged at 12 degree apart with another slot. In an embodiment, each grooved T-shaped slot including the plurality of Hall Effect sensors is arranged at 60 degree apart from each other grooved T-shaped slot in the stator assembly 100.
[0047]In an embodiment, the bottom side 104 of the grooved part includes a first part 106A and a second part 106B. The second part 106B of the bottom side 104 of the grooved part is extended from the first part 106A of the bottom side 104 of the grooved part. In an embodiment, the length of the second part 106B of the bottom side 104 of the grooved part is 6.9 millimetre (mm). In another embodiment, the breath of the second part 106B of the bottom side 104 of the grooved part is 2.2 mm. In an embodiment, the length of the first part 106A of the bottom side 104 of the grooved part is 3.2 millimetre (mm). In another embodiment, the breath of the first part 106A of the bottom side 104 of the grooved part is 1.2 mm.
[0048]FIGS. 1C-1D are schematic representations depicting that the plurality of Hall Effect sensors 110 with a plurality of printed circuit boards (PCBs) 108 arranged in the plurality of slots 102 in the stator assembly 100, such as those shown in FIG. 1A, in accordance with an embodiment of the present disclosure. Each Hall Effect sensor 110 of the plurality of Hall Effect sensors 110 is arranged at a top portion of the T-shaped structure, and each PCB 108 of the plurality of PCBs 108 is arranged at a bottom portion of the T-shaped structure.
[0049]FIG. 1E is a detailed view of the Hall Effect sensor 110 mounted on a printed circuit board (PCB) 108, such as those shown in FIG. 1C, in accordance with an embodiment of the present disclosure. The Hall Effect sensor 110 is positioned in the plurality of T-shaped slots 102 in the stator assembly 100, which adapts the Hall Effect sensor 110 to generate accurate and noise-free Hall signals related to permanent magnetic field lines of a rotor at a predetermined angle (e.g., almost 90 degrees) to detect a position of the rotor in the motor assembly.
[0050]FIG. 2A is a schematic representation of the stator assembly 100 including the plurality of slots 102 with unique placement of the plurality of Hall Effect sensors 110, such as those shown in FIG. 1B, in accordance with an embodiment of the present disclosure. In an embodiment, the diameter of the circle outer surface is 206.6 mm. In another embodiment, the diameter of the inner circle surface is 139 mm.
[0051]The plurality of Hall Effect sensors 110 is arranged on a plurality of printed circuit boards (PCBs) 108. In an embodiment, an arrangement of each Hall Effect sensor 110 on each PCB 108 is fabricated to be structured as a T-shaped structure. The T-shaped structure including the arrangement of each Hall Effect sensor 110 on each PCB 108 that is inserted in each T-shaped slot of the plurality of T-shaped slots 102 in the stator assembly 100. Each Hall Effect sensor 110 of the plurality of Hall Effect sensors 110 is positioned in the plurality of T-shaped slots 102 in the stator assembly 100, which adapts the Hall Effect sensor 110 to generate the accurate and noise-free Hall signals related to the permanent magnetic field lines of a rotor at the predetermined angle (e.g., almost 90 degrees) to detect a position of the rotor in the motor assembly.
[0052]FIG. 2B is a top perspective view of the stator assembly 100 including the plurality of slots 102, such as those shown in FIG. 1A, in accordance with an embodiment of the present disclosure. FIG. 2B shows the plurality of T-shaped slots 102 around the circular outer surface of the stator segment. The plurality of T-shaped slots 102 includes the grooved part where the T-shaped structure including the arrangement of each Hall Effect sensor 110 on each PCB 108 is inserted. In an embodiment, the top perspective view of the stator assembly 100 shows top side 202 of the grooved part of the T-shaped slot 102.
[0053]FIG. 2C is a top view of a circular outer surface of a stator segment with the plurality of slots 102, such as those shown in FIG. 1A, in accordance with an embodiment of the present disclosure. In an embodiment, the length of each slot of the plurality of slots 102 is 53 mm.
[0054]FIG. 2D is a detailed view of the top side 202 of the grooved part of the T-shaped slot 102, such as those shown in FIG. 1B, in accordance with an embodiment of the present disclosure. FIG. 2D shows the top side 202 of the grooved part of the T-shaped slot 102. In an embodiment, the length of the top side 202 of the grooved part of the T-shaped slot 102 is 3.2 mm. In another embodiment, the breath of the top side 202 of the grooved part of the T-shaped slot 102 is 3 mm. In an embodiment, the arrangement of each Hall Effect sensor 110 on each PCB 108 is fabricated to be structured as the T-shaped structure. In an embodiment, the Hall Effect sensor 110 in the T-shaped structure becomes a leg (i.e., placed in the bottom side) of the T-shaped structure. In another embodiment, the PCB 108 in the T-shaped structure becomes a head (i.e., placed in the top side) of the T-shaped structure.
[0055]FIG. 2E is a detailed view of the grooved part of the T-shaped slot 102, such as those shown in FIG. 2B, in accordance with an embodiment of the present disclosure. The detailed view depicts the grooved part of the T-shaped slot 102 in which the plurality of Hall Effect sensors 110 with the plurality of PCBs 108 is inserted.
[0056]FIG. 3A is a schematic representation stator stacking, where the plurality of slots 102 is stacked using a stator stamping method implementing a suitable auto stitching mechanism, in accordance with an embodiment of the present disclosure. The stator stacking is typically done using an auto stitch method. Hence, the suitable auto stitching mechanism is implemented for the stator stacking using a stator stamping method.
[0057]FIG. 3B is a detailed view of the plurality of slots 102 that is staked in the stator assembly 100, such as those shown in FIG. 3A, in accordance with an embodiment of the present disclosure. In an embodiment, each of the plurality of T-shaped slots 102 is equally spaced at 12 degree apart from another T-shaped slot 102. In an embodiment, the distance between a top portion of each T-shaped slot 102 and the top portion of neighbour T-shaped slot 102 is 3 mm. In an embodiment, each T-shaped slot 102 includes a curve portion on both sides. The breath of the curve portion of each T-shaped slot 102 is 2.5 mm.
[0058]In an embodiment, the distance between the top portion of the T-shaped slot 102 and a top portion of the curve portion of the T-shaped slot 102 is 1.8 mm. In an embodiment, the distance between the top portion of the curve portion of the T-shaped slot 102 and a bottom side of the space between the two t-shaped slots 102 is 28 mm. In another embodiment, the distance between the curve portions (e.g., a right curve portion of a first T-shaped slot 102 and a left curve portion of a second T-shaped slot 102) of two T-shaped slots 102 is 11.9 mm. In another embodiment, each curve portion of the T-shaped slot 102 is arranged at 10.3 degree apart from the curve portion of another T-shaped slot 102.
[0059]The present invention provides the stator assembly 100 that uniquely accommodates the plurality of Hall Effect sensors 110 for the brushless direct current (BLDC) hub motor assembly for optimizing rotor-stator synchronization. Since, the plurality of Hall Effect sensors 110 is perfectly arranged inside the plurality of slots 102 of the stator segment, the plurality of Hall Effect sensors 110 is not affected from at least one of: vibrations, misalignments, incorrect positions, slipping and sliding.
[0060]Further, as the plurality of Hall Effect sensors 110 is perfectly placed inside the plurality of T-shaped slots 102 in the stator assembly 100, the plurality of Hall Effect sensors 110 is protected from at least one of: stress and damage due to the harsh environments that the plurality of Hall effect sensors 110 open to. Further, the plurality of Hall Effect sensors 110 generates the accurate and noise-free Hall signals related to the permanent magnetic field lines of the rotor when the plurality of Hall Effect sensors 110 is in tranquil state in the BLDC hub motor assembly.
[0061]Further, the Hall signals related to the permanent magnetic field lines increase production of accurate and correct switching patterns for a plurality of stator windings. Furthermore, the unique placements of the plurality of Hall Effect sensors 110 result in an accurate rotor position feedback so that the requirement of accurate rotor-stator synchronization is achieved.
[0062]Furthermore, the stator assembly 100 with unique placements of a plurality of Hall Effect sensors 110 for a brushless direct current (BLDC) hub motor assembly provides advantages to the BLDC hub motor assembly, which includes at least one of: (a) accurately sensing of the rotor position, (b) circumvents incorrect switching pattern, (c) steer clear of the misalignment in the position of the plurality of Hall Effect sensors 110, (d) perfect seating for the plurality of PCBs 108 mounted with the plurality of Hall Effect sensors 110, (e) stamp out the torque pulsation, vibration and audible noise, (f) boosting of the accuracy of the Hall signals, (g) suitable for mass production, (h) dwindle the stress in mechanical parts of a drive system, and (i) elevating overall drive performance.
[0063]While specific language has been used to describe the disclosure, any limitations arising on account of the same are not intended. As would be apparent to a person skilled in the art, various working modifications may be made to the method in order to implement the inventive concept as taught herein.
[0064]The figures and the foregoing description give examples of embodiments. Those skilled in the art will appreciate that one or more of the described elements may well be combined into a single functional element. Alternatively, certain elements may be split into multiple functional elements. Elements from one embodiment may be added to another embodiment. For example, order of processes described herein may be changed and are not limited to the manner described herein. Moreover, the actions of any flow diagram need not be implemented in the order shown; nor do all of the acts need to be necessarily performed. Also, those acts that are not dependant on other acts may be performed in parallel with the other acts. The scope of embodiments is by no means limited by these specific examples.
, Claims:WE CLAIM:
1. A stator assembly (100) with a plurality of T-shaped slots for a plurality of Hall Effect sensors (110) for optimizing rotor-stator synchronization, the stator assembly (100) comprising:
a plurality of slots (102), wherein the plurality of slots (102) is arranged at an edge of an outer end of a stator segment along a circular outer surface of the stator segment, characterized in that each of the plurality of slots (102) is arranged as a T-shaped slot (102) in the stator assembly (100), characterized in that
the plurality of slots comprises a plurality of grooves (104, 202) in which the plurality of Hall Effect sensors (110) arranged with a plurality of printed circuit boards (PCBs) (108), characterized in that
an arrangement of each Hall Effect sensor (110) on each PCB (108) is fabricated to be structured as a T-shaped structure,
the T-shaped structure comprising the arrangement of each Hall Effect sensor (110) on each PCB (108) that is inserted in each groove (104, 202) in each T-shaped slot of the plurality of T-shaped slots (102), and
each Hall Effect sensor (110) of the plurality of Hall Effect sensors (110) is arranged at a top portion of the T-shaped structure, and each PCB (108) of the plurality of PCBs (108) is arranged at a bottom portion of the T-shaped structure, and characterized in that
each Hall Effect sensor (110) of the plurality of Hall Effect sensors (110) is positioned in the plurality of T-shaped slots (102 ) in the stator assembly (100), which adapts the Hall Effect sensor (110) to generate accurate and noise-free Hall signals related to permanent magnetic field lines of a rotor at a predetermined angle to detect a position of the rotor in a motor assembly.

2. The stator assembly (100) as claimed in claim 1, wherein the plurality of slots (102) is stacked in the stator assembly (100) using a stator stamping method implementing a suitable auto stitching mechanism.

3. The stator assembly (100) as claimed in claim 1, wherein the plurality of Hall Effect sensors (110) is properly arranged inside the plurality of slots (102) of the stator segment, which adapts the plurality of Hall Effect sensors (110) to be protected from at least one of: vibrations, misalignments, incorrect positions, slipping and sliding.

4. The stator assembly (100) as claimed in claim 1, wherein the plurality of Hall Effect sensors (110) is configured to generate the accurate and noise-free Hall signals related to the permanent magnetic field lines of the rotor when the plurality of Hall Effect sensors (110) is in tranquil state in the motor assembly.

5. The stator assembly (100) as claimed in claim 4, wherein the Hall signals related to the permanent magnetic field lines increase production of accurate and correct switching patterns for a plurality of stator windings.

6. The stator assembly (100) as claimed in claim 1, wherein the plurality of T-shaped slots (102) comprises the plurality of grooves (104, 202) at a top portion of the T-shaped slots (102) to allow each Hall Effect sensor (110) mounted with each PCB (108).

Dated this 11th day of December 2023

Vidya Bhaskar Singh Nandiyal
Patent Agent (IN/PA-2912)
Agent for applicant