Zero setting device and method suitable for slotless brushless direct current motor

Abstract

The invention relates to the technical field of zero setting of slotless and brushless direct current motors, and discloses a zero setting device and method suitable for a slotless and brushless direct current motor, the zero setting device suitable for the slotless and brushless direct current motor comprises an adjusting bottom plate, a sliding block, a driving assembly and a debugging mandrel, a sliding block is arranged on the adjusting bottom plate and slides on the adjusting bottom plate, a mounting support is fixed to the base, a driving assembly is fixed to one side of the mounting support and comprises a driver and a driving motor, a debugging mandrel is fixed to the driving motor, the driver controls the rotating speed of the driving motor, and then the driving motor drives the debugging mandrel to rotate. According to the device, the combination of the adjusting bottom plate and the sliding block realizes fine adjustment of the stator assembly position, and ensures that the stator assembly can be accurately and stably close to the debugging mandrel, so that the debugging precision is greatly improved, the problem of repeated disassembly and assembly during the zero adjustment of the motor can be avoided, and the zero adjustment efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of zero adjustment of slotless brushless DC motors, and in particular relates to a zero adjustment device and method suitable for slotless brushless DC motors. Background Art

[0002] The slotless brushless DC motor has a simple structure and does not have the brush structure of traditional motors. Its core working principle is to transmit the rotor position signal to the controller through the sensor stator to realize the electronic commutation function. When installing the sensor stator, the sensor stator needs to be zeroed to ensure that the sensor stator can correctly detect the position of the rotor poles and realize accurate electronic commutation, so that the slotless brushless DC motor can run efficiently and stably. In the manufacturing and assembly process of the motor, the installation and zeroing steps of the sensor stator are crucial. The zeroing process is designed to ensure that the sensor stator can accurately identify the current position of the rotor poles, which is the prerequisite for achieving accurate electronic commutation and optimizing motor performance. Through meticulous zeroing work, the performance fluctuations caused by position detection errors can be minimized, thereby ensuring the smoothness and efficiency of the motor operation.

[0003] In addition, if Figure 1 As shown, the motor adopts a hollow cup winding solution, and the stator assembly is mainly composed of a hollow cup winding 4, a composite material 3, a stator core 2, a stator assembly housing 1, a bracket 5 and a sensor stator 6. The stator core 2 is a slotless core, and the hollow cup winding 4 and the stator core 2 are insulated and protected by a composite material.

[0004] For the multi-variety, small batch production mode, the zeroing of the slotless brushless DC motor is carried out after the motor is pre-assembled. The motor is dragged back using the zeroing device, the motor lead wire is connected to the oscilloscope, the positive and negative lead wires of the sensor stator are connected to the positive and negative poles of the power supply, and the winding back electromotive force waveform and the sensor stator signal waveform are observed with the oscilloscope. If the positional relationship of the waveform is inconsistent with the requirements, the motor end cover is disassembled, the sensor stator angle is adjusted, and the motor is reassembled and measured until the positional relationship of the waveform is consistent with the requirements. This zeroing method ① requires the disassembly and assembly of the motor end cover, which is easy to cause damage to other parts and the insulation layer of the lead wire, which may cause the lead wire to fall off in severe cases, and repeated disassembly and assembly affect work efficiency; ② the motor end cover is not fixed during zeroing, the distance between the sensor stator and the sensor magnet is inconsistent with the final state, and the debugging device pad steel plate visually checks the motor and the drive motor level, and the coaxiality is difficult to ensure, and the debugging accuracy cannot be guaranteed. Summary of the invention

[0005] The purpose of the present invention is to overcome the above problems and provide a zeroing device and method suitable for a slotless brushless DC motor, which solves the shortcomings of the prior art that the slotless brushless DC motor needs to be repeatedly disassembled and assembled during zeroing, which affects the work efficiency and has low debugging accuracy.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: In a first aspect, the present invention provides a zero adjustment device for a slotless brushless DC motor, comprising an adjustment base plate, the adjustment base plate being mounted on a base, a slider being mounted on the adjustment base plate, the slider sliding on the adjustment base plate, a V-shaped groove being arranged on the upper portion of the slider, a mounting bracket being fixed on the base, a drive assembly being fixed on one side of the mounting bracket, and the drive assembly being connected to a debugging spindle; The driving assembly includes a driver and a driving motor. The driving motor is fixedly connected to the mounting bracket, and the driver controls the rotation speed of the driving motor.

[0007] A further improvement of the present invention is that the debugging core shaft includes a rotating shaft, a first rotor pressure ring, a motor magnet, a second rotor pressure ring and a sensor magnet, wherein the rotating shaft is connected to the driving motor, the first rotor pressure ring is located at one end of the rotating shaft, the second rotor pressure ring is located at the other end of the rotating shaft, the motor magnet is located between the first rotor pressure ring and the second rotor pressure ring, and the sensor magnet is located in the countersunk hole of the second rotor pressure ring.

[0008] A further improvement of the present invention is that a sliding guide rail is arranged on the adjusting bottom plate, and a sliding groove adapted to the sliding guide rail is arranged at the bottom of the sliding block.

[0009] A further improvement of the present invention is that a connecting flange is provided on the mounting bracket, the connecting flange cooperates with the drive motor through a stopper and is fixed to the end face of the drive motor by screws, and the debugging core shaft is positioned with the inner hole of the hollow shaft of the drive motor and is connected and fixed to the hollow shaft of the drive motor by screws.

[0010] A further improvement of the present invention is that the mounting bracket is fixedly connected to the base by screws.

[0011] A further improvement of the present invention is that support columns are provided at the four corners below the base.

[0012] A further improvement of the present invention is that both the sliding block and the adjusting base plate are made of non-magnetic materials.

[0013] A further improvement of the present invention is that the adjusting base plate is connected to the base via an adjusting stud and a positioning pin.

[0014] A further improvement of the present invention is that the adjusting studs are located at symmetrical angles of the bottom of the adjusting base plate, and the positioning pins are located at the other two symmetrical angles of the bottom of the adjusting base plate.

[0015] In a second aspect, the present invention further provides a zeroing method applicable to a slotless brushless DC motor, comprising the following steps: Step 1: Place the zero adjustment device on the workbench and keep the base level; Step 2: Install the stator assembly in the V-groove on the slider, adjust the height of the adjustment base plate, ensure that the adjustment base plate is level, and make the center line of the stator assembly coincide with the center line of the debugging mandrel; Step 3: Slide the slider to move the stator assembly to the side of the debugging mandrel; Step 4: Adjust the speed of the drive motor to drive the debugging mandrel to rotate, and fine-tune the sensor stator signal waveform until the sensor stator signal waveform and the winding back electromotive force waveform position are consistent with the requirements; Step 5. After zeroing is completed, turn off the drive motor to stop the debugging spindle from rotating. Mark the position of the sensor stator and the stator assembly housing, and temporarily fix them with quick-drying glue. Slide the slider to drive the stator assembly away from the debugging spindle.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The invention provides a zeroing device suitable for a slotless brushless DC motor. An adjusting base plate is installed on a base, a slider is arranged on the adjusting base plate, the slider can slide on the adjusting base plate, so that a stator assembly placed on a V-shaped groove of the slider is close to a debugging core shaft. A mounting bracket is fixed on the base, a driving component is fixed on one side of the mounting bracket, the driving component includes a driver and a driving motor, the debugging core shaft is fixed on the driving motor, the driver controls the speed of the driving motor, and then the driving motor drives the debugging core shaft to rotate. The combination of the adjusting base plate and the slider of the device realizes fine adjustment of the stator assembly position, the stable sliding of the slider on the adjusting base plate ensures that the stator assembly can be accurately and stably close to the debugging core shaft, thereby greatly improving the debugging accuracy, and can avoid the problem of repeated disassembly and assembly when the motor is zeroed, thereby improving the efficiency of zeroing.

[0017] Furthermore, a sliding guide rail is provided on the adjusting base plate, and a sliding groove adapted to the sliding guide rail is provided at the bottom of the slider. The cooperation between the sliding guide rail and the sliding groove can ensure that the moving trajectory of the slider on the adjusting base plate is accurate, which helps to achieve fine-tuning of the stator assembly, thereby improving the assembly accuracy of the entire slotless brushless DC motor.

[0018] Furthermore, a connecting flange is provided on the mounting bracket, and the connecting flange cooperates with the drive motor through a stopper and is fixed to the end face of the drive motor by screws. The debugging mandrel is positioned with the inner hole of the hollow shaft of the drive motor and is connected and fixed to the hollow shaft of the drive motor by screws. This ensures that the relative positions between the mounting bracket and the drive motor and between the drive motor and the debugging mandrel are accurate, helps to reduce performance problems caused by installation deviations, improves the assembly accuracy of the entire slotless brushless DC motor, makes the connection more stable, can effectively resist external vibration and impact, and improves the stability of the entire system.

[0019] Furthermore, the slider and the debugging base plate are both made of non-magnetic materials. The use of a slider and a debugging base plate made of non-magnetic materials can avoid the influence of the magnetic field of the debugging core shaft on the accuracy of the slider and the debugging base plate, thereby ensuring the accuracy of the motor zeroing, and at the same time eliminating the influence of the magnetic field of the debugging core shaft on the zeroing accuracy, thereby ensuring the stability and reliability of the motor operation.

[0020] Furthermore, the adjusting base plate is connected to the base through adjusting studs and locating pins. The distance between the adjusting base plate and the debugging spindle can be changed by adjusting the studs to adapt to the zeroing work of different motors. The locating pins and the adjusting base plate are matched with high precision to keep the adjusting base plate at a certain level, thereby preventing the adjusting base plate from tilting due to large deviations in the adjustment distances of the adjusting studs at both ends.

[0021] The present invention also provides a zeroing method suitable for a slotless brushless DC motor, which ensures that the adjusting base plate is level by adjusting the height of the adjusting base plate, thereby making the stator assembly center line accurately coincide with the debugging core shaft center line, thereby reducing performance fluctuations caused by installation deviations and improving the accuracy of zeroing; by fine-tuning the sensor stator signal waveform until its position and that of the winding back electromotive force waveform are consistent with requirements, high-precision phase matching is achieved, ensuring that the motor can accurately sense and respond to changes in current and magnetic field during operation; in addition, by quickly moving the stator assembly through a sliding slider and quickly responding to the driving motor, the zeroing time is shortened, the work efficiency is improved, and the motor can be put into production and use more quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the drawings are only schematic, used to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the various components of the present invention.

[0023] Figure 1 It is a schematic diagram of the stator assembly structure of the slotless brushless DC motor of the present invention; Figure 2 It is a front view of the zero adjustment device of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the zero adjustment device of the present invention; Figure 4 It is a schematic diagram of the debugging mandrel structure of the present invention; Figure 5 It is a schematic diagram of the structure of the slider and the debugging base plate of the present invention; Figure 6 It is an enlarged schematic diagram of the structural details of the slider of the present invention.

[0024] Among them: 1. stator assembly housing; 2. stator core; 3. composite material; 4. hollow cup winding; 5. bracket; 6. sensor stator; 7. drive assembly; 8. mounting bracket; 9. connecting flange; 10. debugging mandrel; 11. adjusting stud; 12. slider; 13. adjusting base plate; 14. positioning pin; 15. base; 16. support column; 17. rotating shaft; 18. first rotor pressure ring; 19. motor magnet; 20. second rotor pressure ring; 21. sensor magnet. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings: Example 1 like Figure 2 and Figure 3 As shown, the embodiment of the present invention provides a zero adjustment device suitable for a slotless brushless DC motor, comprising a drive assembly 7, a mounting bracket 8, a connecting flange 9, a debugging spindle 10, an adjustment stud 11, a slider 12, an adjustment base plate 13, a positioning pin 14, a base 15 and a support column 16, wherein the drive assembly 7 comprises a driver and a drive motor; In this embodiment, an adjusting base plate 13 is installed on a base 15, a slider 12 is installed on the adjusting base plate 13, the slider 12 slides on the adjusting base plate 13, a mounting bracket 8 is fixed on the base 15, a connecting flange 9 is provided on the mounting bracket 8, the connecting flange 9 cooperates with the driving motor through a stopper, and is fixed to the end face of the driving motor by screws, the debugging mandrel 10 is positioned with the inner hole of the hollow shaft of the driving motor, and is connected and fixed to the hollow shaft of the driving motor by screws, the driver controls the speed of the driving motor, the driving motor drives the debugging mandrel 10 to rotate, and the debugging mandrel 10 is positioned with the inner hole of the hollow shaft of the driving motor, thereby ensuring the coaxiality between the debugging mandrel 10 and the driving motor, thereby improving the transmission accuracy and stability, and through precise screw connection and fixation, the transmission error caused by loose connection or misalignment is further reduced.

[0032] The mounting bracket 8 is fixedly connected to the base 15 by screws, and support columns 16 are provided at the four corners below the base 15. By adjusting the length of the support columns 16, the height of the base 15 can be conveniently adjusted to adapt to different installation environments or specific requirements of the equipment for height. The support columns 16 provided at the four corners provide a stable support point for the base 15, effectively preventing the base 15 from shaking or tilting due to external forces. The screw connection method makes the installation and disassembly between the mounting bracket 8 and the base 15 simple and quick, which not only improves the adaptability and stability of the equipment, but also simplifies the installation and maintenance process, while improving safety.

[0033] The adjusting base plate 13 is connected to the base 15 through the adjusting studs 11 and the positioning pins 14. The distance between the adjusting base plate 13 and the debugging spindle 10 can be changed by adjusting the studs 11 to adapt to the zeroing work of different motors. The positioning pins 14 and the adjusting base plate 13 are matched with high precision to keep the adjusting base plate 13 at a certain level to prevent the adjusting base plate 13 from tilting due to a large deviation in the adjustment distance of the adjusting studs 11 at both ends.

[0034] The adjusting stud 11 is located at the symmetrical angle of the bottom of the adjusting base plate 13, and the positioning pin 14 is located at the other two symmetrical angles of the bottom of the adjusting base plate 13. Placing the adjusting stud 11 at the symmetrical angle of the adjusting base plate 13 can ensure that the adjusting base plate 13 can be evenly stressed when subjected to external force, thereby reducing deformation or damage caused by uneven force. The positioning pin 14 is located at the other two symmetrical angles and works together with the adjusting stud 11 to form a stable triangular support structure, which can effectively prevent the base plate from moving or shaking during use.

[0035] In this embodiment, Figure 4 As shown, the debugging core shaft 10 includes a rotating shaft 17, a first rotor pressure ring 18, a motor magnet 19, a second rotor pressure ring 20 and a sensor magnet 21, wherein the rotating shaft 17 is connected to the driving motor, the first rotor pressure ring 18 is located at one end of the rotating shaft 17, the second rotor pressure ring 20 is located at the other end of the rotating shaft 17, the motor magnet 19 is located between the first rotor pressure ring 18 and the second rotor pressure ring 20, and the sensor magnet 21 is located in the countersunk hole of the second rotor pressure ring 20.

[0036] The slider 12 and the adjustment base plate 13 are both made of non-magnetic materials. The slider 12 and the adjustment base plate 13 made of non-magnetic materials can effectively isolate the interference of the external magnetic field on the internal components, ensure the stability and reliability of the motor operation, and thus eliminate the influence of the magnetism of the magnetic steel of the debugging core shaft 10 on the zero adjustment accuracy.

[0037] In this embodiment, Figure 5 As shown, a sliding guide rail is arranged on the adjusting base plate 13, and a slide groove adapted to the sliding guide rail is arranged at the bottom of the slider 12. The slider 12 moves left and right through the sliding guide rail, which is convenient for stator assembly, installation and disassembly before and after zeroing. The cooperation between the sliding guide rail and the slide groove can ensure that the moving trajectory of the slider 12 on the adjusting base plate 13 is accurate, which helps to achieve fine-tuning of the stator assembly, thereby improving the assembly accuracy of the entire slotless brushless DC motor.

[0038] In this embodiment, Figure 6 As shown, a V-shaped groove is provided on the slider 12, and the V-shaped groove facilitates the stator assembly to be firmly placed on the slider 12, so that the slider 12 moves on the adjustment base plate 13, thereby driving the stator assembly to move stably.

[0039] Example 2 The embodiment of the present invention further provides a zero adjustment method applicable to a slotless brushless DC motor, comprising the following steps: Step 1: Place the zero adjustment device on the workbench and adjust the support column 16 to keep the base 15 level; Step 2: Install the stator assembly in the V-shaped groove on the slider 12, adjust the height of the adjustment base plate 13, ensure that the adjustment base plate 13 is level, and make the center line of the stator assembly coincide with the center line of the debugging mandrel 10; Step 3: Slide the slider 12 to move the stator assembly to the side of the debugging mandrel 10 so that the stator assembly housing is matched with the connecting flange 9; Step 4: adjust the speed of the driving motor to drive the debugging mandrel 10 to rotate, and fine-tune the signal waveform of the sensor stator 6 until the position of the sensor stator 6 signal waveform and the winding back electromotive force waveform are consistent with the requirements; Step 5, after zeroing is completed, turn off the drive motor to stop the debugging spindle 10 from rotating, mark the position of the sensor stator 6 and the stator assembly housing 1, and temporarily fix them with quick-drying glue, and slide the slider 12 to drive the stator assembly away from the debugging spindle 10.

[0040] In summary, the present invention fine-tunes the sensor stator signal waveform until its position is consistent with the winding back electromotive force waveform and the requirement. This method ensures that the sensor stator can accurately detect the position of the rotor poles, thereby achieving high-precision electronic commutation. During the adjustment process, it is ensured that the stator assembly center line coincides with the debugging core shaft center line, further improving the accuracy of zeroing. This method does not require repeated disassembly and assembly when zeroing the motor, which can further improve work efficiency.

[0041] Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but rather with reference to the preceding claims and the full scope of equivalents to which such claims are entitled. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to be a disclaimer of such subject matter, nor should it be considered that the applicants did not consider such subject matter to be part of the disclosed inventive subject matter.

[0042] The above content is a further detailed description of the present invention. It cannot be determined that the specific implementation methods of the present invention are limited to these. For ordinary technicians in the technical field to which the present invention belongs, without departing from the concept of the present invention, they can also make several simple deductions or substitutions, which should be regarded as belonging to the protection scope of the present invention determined by the submitted claims.

Claims

1. A zero adjustment device for a slotless brushless DC motor, characterized in that: The utility model comprises an adjusting base plate (13), the adjusting base plate (13) is mounted on a base (15), a slider (12) is mounted on the adjusting base plate (13), the slider (12) slides on the adjusting base plate (13), a V-shaped groove is arranged on the upper part of the slider (12), a mounting bracket (8) is fixed on the base (15), a driving component (7) is fixed on one side of the mounting bracket (8), and the driving component (7) is connected to the debugging mandrel (10); The driving assembly (7) comprises a driver and a driving motor, the driving motor is fixedly connected to the mounting bracket (8), and the driver controls the speed of the driving motor.

2. A zero adjustment device for a slotless brushless DC motor according to claim 1, characterized in that: The debugging mandrel (10) comprises a rotating shaft (17), a first rotor pressing ring (18), a motor magnetic steel (19), a second rotor pressing ring (20) and a sensor magnetic steel (21), wherein the rotating shaft (17) is connected to the driving motor, the first rotor pressing ring (18) is located at one end of the rotating shaft (17), the second rotor pressing ring (20) is located at the other end of the rotating shaft (17), the motor magnetic steel (19) is located between the first rotor pressing ring (18) and the second rotor pressing ring (20), and the sensor magnetic steel (21) is located in a countersunk hole of the second rotor pressing ring (20).

3. A zero adjustment device for a slotless brushless DC motor according to claim 1, characterized in that: The adjusting base plate (13) is provided with a sliding guide rail, and the bottom of the sliding block (12) is provided with a sliding groove adapted to the sliding guide rail.

4. A zero adjustment device for a slotless brushless DC motor according to claim 1, characterized in that: The mounting bracket (8) is provided with a connecting flange (9), the connecting flange (9) is matched with the driving motor through a stopper and is fixed to the end face of the driving motor by screws, and the debugging mandrel (10) is positioned with the inner hole of the hollow shaft of the driving motor and is connected and fixed to the hollow shaft of the driving motor by screws.

5. A zero adjustment device for a slotless brushless DC motor according to claim 1, characterized in that: The mounting bracket (8) is fixedly connected to the base (15) by means of screws.

6. A zero adjustment device for a slotless brushless DC motor according to claim 1, characterized in that: Support columns (16) are provided at the four corners below the base (15).

7. A zero adjustment device for a slotless brushless DC motor according to claim 1, characterized in that: The sliding block (12) and the adjusting base plate (13) are both made of non-magnetic materials.

8. A zero adjustment device for a slotless brushless DC motor according to claim 1, characterized in that: The adjusting base plate (13) is connected to the base (15) via an adjusting stud (11) and a positioning pin (14).

9. A zero adjustment device for a slotless brushless DC motor according to claim 8, characterized in that: The adjusting stud (11) is located at a symmetrical angle at the bottom of the adjusting base plate (13), and the positioning pin (14) is located at the other two symmetrical angles at the bottom of the adjusting base plate (13).

10. A zeroing method for a slotless brushless DC motor, characterized in that: The following steps are involved: Step 1, placing the zero adjustment device on a workbench so that the base (15) remains horizontal; Step 2: install the stator assembly in the V-shaped groove on the slider (12), adjust the height of the adjustment base plate (13), ensure that the adjustment base plate (13) is horizontal, and make the center line of the stator assembly coincide with the center line of the debugging mandrel (10); Step 3, slide the slider (12) to move the stator assembly to one side of the debugging mandrel (10); Step 4, adjusting the speed of the driving motor to drive the debugging mandrel (10) to rotate, and fine-tuning the sensor stator signal waveform until the sensor stator signal waveform and the winding back electromotive force waveform position are consistent with the requirements; Step 5. After zeroing is completed, turn off the drive motor to stop the debugging mandrel (10), mark the position of the sensor stator and the stator assembly housing, and temporarily fix them with quick-drying glue, and slide the slider (12) to drive the stator assembly away from the debugging mandrel (10).

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