A magnetic ring magnetizing fixture and its use method

Abstract

The present invention belongs to the field of magnetic ring magnetization technology and relates to motor processing and manufacturing. It discloses a magnetic ring magnetization fixture and a method for using the same. In the magnetic ring magnetization fixture, the left-slanted inner stator and the left-slanted iron core of the outer stator are positioned and assembled, and the right-slanted inner stator and the right-slanted iron core of the outer stator are positioned and assembled, forming a V-shaped magnetic ring magnetization fixture. Alternatively, the left-slanted inner stator and the right-slanted iron core of the outer stator are positioned and assembled, and the right-slanted inner stator and the left-slanted iron core of the outer stator are positioned and assembled, forming a W-shaped magnetic ring magnetization fixture. The technical solution disclosed in the present invention can achieve magnetic ring magnetization. After magnetization, the magnetic poles of the magnetic ring are V-shaped or W-shaped, with better slanted pole effect. Compared with the existing traditional single-sided slanted pole, the operation is smoother and the noise is lower.

Description

Technical Field

[0001] The invention belongs to the technical field of magnetic ring magnetization, relates to motor processing and manufacturing, and particularly relates to a magnetic ring magnetization fixture and a use method thereof. Background Art

[0002] Brushless DC motors and permanent magnet synchronous motors are widely used in new energy vehicles, industrial automation, aerospace, and other fields due to their advantages such as high efficiency and high power density. The core structure of such motors includes a stator core and rotor magnets. Among them, the stator core is usually formed by laminating silicon steel sheets, with a slot structure on the surface to accommodate the winding. The presence of the slots leads to uneven air gap magnetic permeability, causing cogging torque and torque fluctuation. In the rotor magnet structure of traditional processes, the magnets are affixed to the rotor surface in the form of split patches, which need to be positioned and fixed piece by piece. This has problems such as complex process, long working hours, and poor consistency. In view of the above problems, in order to optimize motor performance, the industry has proposed a technical solution for integral magnetic ring magnetization. That is, the ring magnet is directly magnetized into a multi-pole magnetic ring through magnetization equipment, replacing the split magnetic steel pasting process to simplify the assembly process and improve the uniformity of the magnetic field. The use of integral magnetic ring skew pole magnetization can reduce the cogging torque and back EMF harmonic content, which has a good effect on the smooth operation and low-noise operation of the motor.

[0003] Currently, conventional integrated ring magnetization schemes generally utilize a single skewed-pole magnetization fixture. Its structure and principle are explained as follows: The fixture consists of a single stator core with slots on its inner wall matching the number of rotor poles. The slots are evenly distributed along the circumference and offset relative to the centerline, forming a skewed slot structure. The magnetization method involves energizing the coils within the stator slots, generating a rotating magnetic field that magnetizes the ring, causing the poles to exhibit a single skewed orientation (i.e., left- or right-skewed) in the shape of a " / " or "\" (i.e., left- or right-skewed). However, this single skewed orientation results in an uneven axial magnetic field distribution in the ring, generating an axial electromagnetic force component that induces axial and torsional vibration in the motor. Over long-term operation, this unbalanced electromagnetic force exacerbates bearing wear, shortens motor life, and significantly increases noise, making it difficult to meet the requirements of low-noise applications (such as new energy vehicles and precision instruments). While the single skewed pole can partially reduce the cogging torque, the magnetic field harmonics are not fully suppressed, resulting in a high back-EMF harmonic content. This results in significant torque fluctuations during load operation, impacting system control accuracy and stability. In addition, the magnetic ring skew angle must match the motor pole slot (the number of stator slots Z With rotor pole number 2 p ), the optimal pole tilt angle is usually a function of the least common multiple of the pole-slot fit. Existing traditional fixtures are designed for specific pole-slot fit. If the pole tilt angle needs to be adjusted (such as adapting to motors with different pole-slot ratios), the fixture needs to be re-customized, resulting in increased costs (explanatory, the cost of fixture mold opening and processing is high) and extended cycles (explanatory, the design and debugging of new fixtures is time-consuming, which restricts the iteration efficiency).

[0004] In summary, there is an urgent need to develop a new magnetic ring magnetization fixture solution to solve the technical difficulties that still exist in the existing integral magnetic ring magnetization technology. Summary of the Invention

[0005] The present invention aims to provide a magnetic ring magnetization fixture and its use method to address one or more of the above-mentioned technical problems. The technical solution disclosed in the present invention can achieve magnetization of the magnetic ring. After magnetization, the magnetic poles of the magnetic ring are V-shaped or W-shaped, with better slanted pole effects. Compared with the existing traditional single-sided slanted pole, the operation is smoother and quieter.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a magnetic ring magnetizing fixture, comprising: a housing, a rotating shaft, a V-shaped outer stator, a right-slanted inner stator, a left-slanted inner stator, a first outer magnetic conductive ring, a second outer magnetic conductive ring, and an inner magnetic conductive ring; wherein,

[0008] An installation space is provided in the housing, and the rotating shaft is rotatably installed in the installation space;

[0009] The V-shaped outer stator is detachably fixedly installed in the installation space, and the right-slanted inner stator and the left-slanted inner stator are detachably fixedly installed on the rotating shaft; wherein, the V-shaped outer stator comprises an outer stator left-slanted iron core, an outer stator right-slanted iron core and a V-shaped coil, the outer stator left-slanted iron core and the outer stator right-slanted iron core constitute a V-shaped iron core, and the V-shaped iron core is wound with the V-shaped coil; the left-slanted inner stator and the outer stator left-slanted iron core are positioned and assembled, and the right-slanted inner stator and the The right skew core of the outer stator is positioned and assembled to form a V-shaped magnetic ring magnetization fixture. When the V-shaped coil is energized, it can generate a unilateral skewed magnetic field, so that the magnetic ring to be magnetized forms a V-shaped skewed magnetic distribution. Alternatively, the left-slanted inner stator and the right skewed core of the outer stator are positioned and assembled, and the right-slanted inner stator and the left skewed core of the outer stator are positioned and assembled to form a W-shaped magnetic ring magnetization fixture. When the V-shaped coil is energized, it can generate a bilaterally symmetrical skewed magnetic field, so that the magnetic ring to be magnetized forms a W-shaped skewed magnetic distribution.

[0010] The first outer magnetic conductive ring and the second outer magnetic conductive ring are detachably fixed on both sides of the V-shaped outer stator, and the inner magnetic conductive ring is detachably fixed between the right oblique inner stator and the left oblique inner stator; wherein, the first outer magnetic conductive ring and the second outer magnetic conductive ring are used to be set outside the magnetic ring to be magnetized, and the inner magnetic conductive ring is used to be set inside the magnetic ring to be magnetized.

[0011] A further improvement of the technical solution of the present invention is that the V-shaped outer stator is detachably fixedly installed in the installation space, and the right-slanted inner stator and the left-slanted inner stator are detachably fixedly installed on the rotating shaft. The specific structure is as follows:

[0012] The V-shaped outer stator is detachably fixedly mounted in the installation space by means of a keyway connection, and the right oblique inner stator and the left oblique inner stator are detachably fixedly mounted on the rotating shaft by means of a keyway connection;

[0013] Wherein, the central axes of the V-shaped outer stator, the right oblique inner stator, the left oblique inner stator and the rotating shaft coincide with each other.

[0014] A further improvement of the technical solution of the present invention is that the inner walls of the outer stator left oblique core and the outer stator right oblique core are each provided with a plurality of tooth slots evenly distributed in the circumferential direction to form stator teeth, and the number of tooth slots is equal to the number of poles to be magnetized by the magnetized magnetic ring; the coil winding direction of the V-shaped coil follows the right-hand screw rule, and after the V-shaped coil is energized, the polarity of the stator teeth is distributed alternately in an NS pattern in the circumferential direction.

[0015] A further improvement of the technical solution of the present invention is that the outer stator left-slanted core, the outer stator right-slanted core, the right-slanted inner stator, and the left-slanted inner stator are all formed by stacking punching sheets, and semicircular grooves are opened on the punching sheets;

[0016] During processing, the punching sheets are first stacked into oblique grooves, and then keyways for positioning are processed. The keyways are located on the center line of the stator teeth.

[0017] A further improvement of the technical solution of the present invention is that the keyway of the V-shaped outer stator coincides with the keyway of the left-slanted inner stator and the right-slanted inner stator in angular position relative to the center of a circle; the stator teeth facing the keyways of the V-shaped outer stator, the left-slanted inner stator, and the right-slanted inner stator have the same winding direction, the same current flow direction during magnetization, and the same polarity is generated after magnetization.

[0018] A further improvement of the technical solution of the present invention is that the punching sheets of the outer stator left oblique core and the outer stator right oblique core are the same, the height is the same, the angle of the oblique slot is the same and both are , in opposite directions; the left oblique inner stator core and the right oblique inner stator core have the same punching sheets, the same height, the same skew angle and are , in the opposite direction.

[0019] A further improvement of the technical solution of the present invention is that when forming a V-shaped magnetic ring magnetizing fixture, according to the direction along the central axis of the rotating shaft, the left-slanted inner stator, the left-slanted iron core of the outer stator, the right-slanted iron core of the outer stator, and the right-slanted inner stator are arranged in sequence. The magnetic poles of the magnetized magnetic ring after magnetization are V-shaped, and the magnetic ring slant pole angle is .

[0020] A further improvement of the technical solution of the present invention is that when the W-shaped magnetic ring magnetizing fixture is formed, the right-slanted inner stator, the left-slanted iron core of the outer stator, the right-slanted iron core of the outer stator, and the left-slanted inner stator are arranged in the direction along the central axis of the rotating shaft. The magnetic poles of the magnetized magnetic ring after magnetization are W-shaped, and the magnetic ring slant pole angle is .

[0021] A further improvement of the technical solution of the present invention is that the punching sheets are silicon steel sheet punching sheets.

[0022] A second aspect of the present invention provides a method for using a magnetic ring magnetizing fixture, comprising:

[0023] A V-shaped outer stator is detachably fixedly installed in the installation space of the shell, and a right-slanted inner stator and a left-slanted inner stator are detachably fixedly installed on the rotating shaft; in the V-shaped outer stator, the left-slanted iron core of the outer stator and the right-slanted iron core of the outer stator are stacked to form a V-shaped iron core, and a V-shaped coil is wound around the V-shaped iron core; wherein,

[0024] When the magnetic ring to be magnetized needs to form a V-shaped oblique pole magnetic distribution, the left oblique inner stator and the left oblique iron core of the outer stator are positioned and assembled, and the right oblique inner stator and the right oblique iron core of the outer stator are positioned and assembled to form a V-shaped magnetic ring magnetization fixture; the magnetic ring to be magnetized is installed in the magnetic ring magnetization fixture, with the V-shaped outer stator being outside the magnetic ring to be magnetized, and the right oblique inner stator and the left oblique inner stator being inside the magnetic ring to be magnetized. The V-shaped coil is energized to generate a unilateral oblique pole magnetic field, so that the magnetic ring to be magnetized forms a V-shaped oblique pole magnetic distribution;

[0025] When the magnetic ring to be magnetized needs to form a W-shaped oblique pole magnetic distribution, the left oblique inner stator and the right oblique iron core of the outer stator are positioned and assembled, and the right oblique inner stator and the left oblique iron core of the outer stator are positioned and assembled to form a W-shaped magnetic ring magnetization fixture; the magnetic ring to be magnetized is installed in the magnetic ring magnetization fixture, with the V-shaped outer stator being outside the magnetic ring to be magnetized, and the right oblique inner stator and the left oblique inner stator being inside the magnetic ring to be magnetized. The V-shaped coil is energized to generate a bilaterally symmetrical oblique pole magnetic field, so that the magnetic ring to be magnetized forms a W-shaped oblique pole magnetic distribution;

[0026] Among them, during the magnetization process, the first outer magnetic ring and the second outer magnetic ring are detachably fixed on both sides of the V-shaped outer stator, and the first outer magnetic ring and the second outer magnetic ring are arranged outside the magnetic ring to be magnetized; the inner magnetic ring is detachably fixed between the right oblique inner stator and the left oblique inner stator, and the inner magnetic ring is arranged inside the magnetic ring to be magnetized; the first outer magnetic ring, the second outer magnetic ring and the inner magnetic ring are coordinated to achieve the purpose of limiting the magnetic ring to be magnetized and increasing the magnetic conductivity.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The present invention discloses a magnetic ring magnetization fixture, specifically a V-shaped and W-shaped magnetic ring magnetization fixture, capable of magnetizing the magnetic ring. After magnetization, the magnetic poles of the magnetic ring are V-shaped or W-shaped, with better pole skewing effect. Compared with the existing traditional single-sided pole skewing, the operation is smoother and the noise is lower. Explanation: The V-shaped magnetic ring has two pole offset surfaces, which are distributed antisymmetrically, so that the axial electromagnetic forces on the pole offset surfaces cancel each other out; the W-shaped magnetic ring has four pole offset surfaces, which are distributed antisymmetrically, so that the axial electromagnetic forces on the pole offset surfaces also cancel each other out. Therefore, the V-shaped and W-shaped magnetic rings have no unbalanced axial force, solving the problem of reduced bearing life and increased noise caused by axial force in traditional magnetization fixtures. In addition, the optimal pole skewing angle of the V-shaped magnetic ring is twice that of the W-shaped magnetic ring. By simply adjusting the assembly position of the inner stator, two types of V-shaped and W-shaped magnetic ring magnetization fixtures can be formed. They are applicable to motors with two different pole slot combinations, which can reduce the manufacturing cost of the magnetization fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below; obviously, the drawings described below are some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 1 is a schematic diagram of the axial structure of a magnetic ring magnetizing fixture in an embodiment of the present invention;

[0031] Figure 2 1 is a schematic structural diagram of an outer stator in an embodiment of the present invention;

[0032] Figure 3 1 is a schematic structural diagram of a V-shaped magnetizing fixture in an embodiment of the present invention;

[0033] Figure 4 1 is a schematic structural diagram of a W-shaped magnetizing fixture according to an embodiment of the present invention;

[0034] Figure 5 1 is a schematic structural diagram of a V-shaped magnetic ring after magnetization in an embodiment of the present invention;

[0035] Figure 6 1 is a schematic structural diagram of a W-shaped magnetic ring after magnetization in an embodiment of the present invention;

[0036] The explanation of the reference numerals in the figures is as follows:

[0037] 1. Rotating shaft; 2. Housing; 3. First outer magnetic ring; 4. Magnetic ring to be magnetized; 5. Inner magnetic ring; 6. Right-slanted inner stator; 7. V-shaped outer stator; 8. Second outer magnetic ring; 9. Left-slanted inner stator; 10. End cover; 11. Flat key; 12. V-shaped magnetic ring after magnetization; 13. W-shaped magnetic ring after magnetization.

[0038] 7-1. Left-slanted core of outer stator; 7-2. Right-slanted core of outer stator; 7-3. V-shaped coil. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments and technical solutions are only part of the embodiments of the present invention, not all of the embodiments.

[0040] All other embodiments obtained by persons of ordinary skill in the art based on the technical solutions disclosed in the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to these processes, methods, products, or apparatuses.

[0041] See also Figures 1 to 4 The embodiment of the present invention provides a magnetic ring magnetization fixture, specifically a V-shaped and W-shaped magnetic ring magnetization fixture, which specifically includes: a rotating shaft 1, a housing 2, an end cover 10, a V-shaped outer stator 7, two inner stators, two outer magnetic conductive rings and an inner magnetic conductive ring 5; wherein,

[0042] The housing 2 is provided with a preset installation space (specifically, a circular through hole), and the end cover 10 is installed at one end of the installation space; the rotating shaft 1 is provided in the installation space and is rotatably mounted on the end cover 10;

[0043] The V-shaped outer stator 7 is detachably fixedly installed in the installation space, and the right oblique inner stator 6 and the left oblique inner stator 9 are detachably fixedly installed on the rotating shaft 1 . Among them, the V-shaped outer stator 7 includes an outer stator left skew core 7-1, an outer stator right skew core 7-2 and a V-shaped coil 7-3. The outer stator left skew core 7-1 and the outer stator right skew core 7-2 are stacked to form a V-shaped core, and the V-shaped coil 7-3 is wound in the slot of the V-shaped core. The two inner stators are a left skew inner stator 9 and a right skew inner stator 6. The left skew inner stator 9 and the outer stator left skew core 7-1 are positioned and assembled by keyways, and the right skew inner stator 6 and the outer stator right skew core 7-2 are positioned and assembled by keyways to form a V-shaped magnetic ring magnetization fixture; or, the left skew inner stator 9 and the outer stator right skew core 7-2 are positioned and assembled by keyways, and the right skew inner stator 6 and the outer stator left skew core 7-1 are positioned and assembled by keyways to form a W-shaped magnetic ring magnetization fixture. The two outer magnetic conductive rings are a first outer magnetic conductive ring 3 and a second outer magnetic conductive ring 8. The first outer magnetic conductive ring 3 and the second outer magnetic conductive ring 8 are respectively arranged on both sides of the V-shaped outer stator 7, and the inner magnetic conductive ring 5 is arranged between the two inner stators.

[0044] In the technical solution provided by the embodiment of the present invention, the rotating shaft 1 is located at the center of the clamp and can pass through the entire clamp to support the magnetic ring 4 to be magnetized and transmit torque to ensure that the magnetic ring remains stable during the magnetization process. The shell 2 serves as the main structure of the clamp, wrapping and fixing the other components to provide mechanical support and protection functions. The shell 2 is provided with an installation space for accommodating other components to ensure that the relative positions of the components are fixed. The first outer magnetic conductive ring 3 and the second outer magnetic conductive ring 8 are respectively located at different positions inside the shell 2, and are used to concentrate and guide the magnetic field, reduce leakage magnetic field, and improve magnetization efficiency; wherein, the first outer magnetic conductive ring 3 and the second outer magnetic conductive ring 8 are respectively located on both sides of the V-shaped outer stator 7. The magnetic ring 4 to be magnetized is installed on the rotating shaft 1 and is a component that needs to be magnetized. The magnetic ring 4 to be magnetized forms a V-shaped or W-shaped oblique pole magnetic distribution through the action of a specific magnetic field in the clamp (specifically, for example, Figure 5 、 Figure 6 As shown, Figure 5 The V-shaped magnetic ring 12 after magnetization is shown. Figure 6 The figure shows a W-shaped magnetic ring 13 after magnetization. The inner magnetic ring 5 is located inside the magnetic ring 4 to be magnetized, between the two inner stators (i.e., the right-slanted inner stator 6 and the left-slanted inner stator 9). It cooperates with the outer magnetic ring to guide the magnetic field through the magnetic ring, optimizing the magnetic circuit design and enhancing the magnetization effect. The right-slanted inner stator 6 and the left-slanted inner stator 9 are key components for achieving skewed magnetization. They can be positioned and assembled with the rotating shaft 1 or other components via a flat key 11. The skew direction can be adjusted as needed. By changing the assembly relationship between the inner and outer stators, switching between V-shaped and W-shaped skewed magnetization can be achieved.

[0045] In summary, in the technical solution provided by the embodiment of the present invention, the assembly relationship of the inner stator is switched by positioning through the keyway, so as to realize the rapid conversion of V-type and W-type oblique pole magnetization, reduce the types and costs of fixtures; the W-type oblique pole design eliminates the asymmetry of the axial magnetic field, solves the vibration and noise problems caused by the traditional single oblique pole, and the modular design ensures the accuracy of the magnetic field distribution, and meets the magnetization requirements of the high pole slot matching motor. Explanatory principle, the right oblique inner stator 6 and the right oblique core 7-2 of the outer stator are positioned and assembled by the flat key 11, and the left oblique inner stator 9 and the left oblique core 7-1 of the outer stator are positioned and assembled by the flat key 11. At this time, the V-shaped coil 7-3 is energized to generate a unilateral oblique pole magnetic field, so that the magnetic ring 4 to be magnetized forms a V-shaped oblique pole magnetic distribution. By changing the inner stator assembly method, the right-slanted inner stator 6 is positioned and assembled with the outer stator's left-slanted core 7-1 using a flat key 11, while the left-slanted inner stator 9 is positioned and assembled with the outer stator's right-slanted core 7-2 using a flat key 11. At this point, when energized, the V-shaped coil 7-3 generates a bilaterally symmetrical skewed magnetic field, causing the magnetized magnetic ring 4 to form a W-shaped skewed magnetic distribution. The technical solution of this embodiment of the present invention, through modular design and keyway positioning and assembly, enables flexible switching between V-shaped and W-shaped skewed magnetization modes, reducing the number of fixtures and cost. Furthermore, by optimizing the magnetic circuit design, it improves magnetization efficiency and magnetic field uniformity, making it suitable for the magnetization requirements of high-precision motor magnetic rings.

[0046] As a preferred technical solution of the present invention, the inner walls of the outer stator left-slanted core 7-1 and the outer stator right-slanted core 7-2 are each provided with a plurality of slots evenly distributed along the circumference, forming stator teeth. The number of slots is equal to the number of poles to be magnetized by the magnetized magnetic ring 4. Furthermore, the winding direction of the V-shaped coil 7-3 follows the right-hand screw rule. When the V-shaped coil 7-3 is energized, the polarity of the stator teeth is distributed in an alternating N-S pattern along the circumference (explained by the principle that adjacent stator teeth have opposite magnetic polarity, i.e., one stator tooth has an N pole and the next adjacent stator tooth has an S pole). Further explaining the principle, the stator teeth play a crucial role in the magnetization fixture. By interacting with the magnetic field generated by the energized coil, they transmit the magnetic field to the magnetized magnetic ring and guide the magnetic ring to form the desired magnetic pole distribution. This alternating magnetic field is one of the key factors in forming the magnetic ring's specific magnetic pole distribution.

[0047] As a preferred technical solution of the present invention, the cores of the V-shaped outer stator 7, the right-slanted inner stator 6, and the left-slanted inner stator 9 are all formed by laminating silicon steel sheet punchings. Semicircular slots are provided on the punchings (explanatory, to provide space for the winding of the V-shaped coil and to optimize the magnetic field). After the cores are laminated into skew slots (explanatory, by laminating the punchings at a certain tilt angle to form a skew slot core), keyways are machined thereon for positioning. The keyways are located on the centerline of the stator teeth. Further illustratively, the keyways are used to precisely assemble the inner and outer stators, ensuring their accurate position and angular relationship during assembly. Designing the keyways on the centerline of the stator teeth ensures the relative positional accuracy between the stator teeth and adjacent components (such as magnetic rings and other stator components), thereby ensuring the accuracy of the magnetic field distribution. In addition, the coordination of the key and keyway strengthens the connection between the components, preventing displacement or loosening due to magnetic field forces during magnetization, thereby ensuring the stability and reliability of the magnetization process.

[0048] In a further preferred technical solution of the embodiment of the present invention, the outer stator left oblique core 7-1 and the outer stator right oblique core 7-2 have the same punching sheets, the same height, the same oblique slot angle, and are both The left oblique inner stator 9 core and the right oblique inner stator 6 core have the same punching sheets, the same height, and the same oblique slot angle. The magnetizing fixture is positioned by the keyway. The order from top to bottom (along the axis of the shaft) is: right-slanted inner stator 6, outer stator left-slanted iron core 7-1, outer stator right-slanted iron core 7-2, left-slanted inner stator 9. After magnetization, the magnetic ring poles are W-shaped, and the magnetic ring pole angle is In addition, the magnetizing fixture is positioned by the keyway, and the order from top to bottom is: left-slanted inner stator 9, outer stator left-slanted iron core 7-1, outer stator right-slanted iron core 7-2, right-slanted inner stator 6. After magnetization, the magnetic ring poles are V-shaped, and the magnetic ring pole angle is .

[0049] In the preferred technical solution of the embodiment of the present invention, the housing 2 is provided with a keyway, which is positioned and assembled with the V-shaped outer stator 7 through the keyway. The rotating shaft 1 is provided with a raised flat key 11 for positioning and assembling with the keyway of the inner stator. The keyway of the V-shaped outer stator 7 coincides with the keyway of the inner stator at the relative center angle. The winding direction on the stator teeth facing the keyways of the outer stator and the two inner stators is the same, the current flows in the same direction during magnetization, and the same polarity is generated after magnetization. Outer magnetic rings are provided on both sides of the outer stator, and an inner magnetic ring 5 is provided between the two inner stators. The inner and outer magnetic rings increase the magnetic conductivity of the magnetic rings during magnetization and limit the position of the magnetic rings. The V-shaped outer stator 7 is the core component for generating a specific magnetic field distribution. It generates a rotating magnetic field by energizing the coil, and cooperates with the inner stator to form the required oblique pole magnetic field. The flat key 11 is used for positioning and assembling between the inner stator and other components to ensure the accurate oblique pole direction of the inner stator and prevent displacement or angular deviation during assembly.

[0050] In a specific embodiment of the present invention, a V-shaped and W-shaped magnetic ring magnetization fixture is provided. The left-slanted inner stator 9 and the outer stator's left-slanted core 7-1 are positioned and assembled using a flat key 11, while the right-slanted inner stator 6 and the outer stator's right-slanted core 7-2 are positioned and assembled using a flat key 11, forming a V-shaped magnetic ring magnetization fixture. The left-slanted inner stator 9 and the outer stator's right-slanted core 7-2 are positioned and assembled using a flat key 11, while the right-slanted inner stator 6 and the outer stator's left-slanted core 7-1 are positioned and assembled using a flat key 11, forming a W-shaped magnetic ring magnetization fixture.

[0051] The inner walls of the outer stator left-skew core 7-1 and the outer stator right-skew core 7-2 are provided with 10 slots evenly distributed along the circumference. The number of slots equals the number of poles to be magnetized by the magnetic ring. The coil winding direction follows the right-hand screw rule, so that when the coil is energized, the stator tooth polarity is distributed in an alternating N-S pattern along the circumference. The outer stator left-skew core 7-1 and the outer stator right-skew core 7-2 have identical punchings, the same height, and the same skew angle of 3°, both in opposite directions. The left-skew inner stator 9 and the right-skew inner stator 6 have identical punchings, the same height, and the same skew angle of 3°, both in opposite directions. When the magnetic ring poles are W-shaped after magnetization, the magnetic ring skew angle is 3°. When the magnetic ring poles are V-shaped after magnetization, the magnetic ring skew angle is 6°. In a specific embodiment of the present invention, the outer stator keyway and the inner stator keyway have an angular position that coincides with the center of the circle. The stator teeth facing the keyways of the V-shaped outer stator 7, the right-slanted inner stator 6 and the left-slanted inner stator 9 have the same winding direction, the same current flow direction during magnetization, and the same polarity is generated after magnetization.

[0052] The magnetic ring magnetization fixture provided by the present invention can be configured as either a V-shaped or a W-shaped magnetization fixture simply by changing the assembly positions of the inner and outer stators. Furthermore, the magnetized magnetic rings have a skew angle that differs by a factor of two, making them suitable for motors with the same number of poles but different pole slot combinations. Specifically, the W-shaped magnetic ring is suitable for motors with 24 slots and 10 poles, while the V-shaped magnetic ring is suitable for motors with 12 slots and 10 poles.

[0053] At present, the overall magnetic ring skew magnetization is achieved by a specially customized magnetization fixture. The traditional magnetic ring magnetization fixture is usually composed of a single stator core. The inner wall of the stator core is provided with slots equal to the number of rotor poles, and the slots are evenly distributed along the circumference. The stator teeth are offset relative to the center line of the stator core to form a skew slot structure. After the coil in the stator slot is energized, a magnetic field is generated to magnetize the magnetic ring. The skew of the magnetic ring poles after magnetization is generally determined by the left or right skew of the stator core, and is in the shape of " / " or "\". This single left or right skew has only one misalignment surface. After the skew, the axial magnetic field of the motor will be asymmetric, generating unbalanced axial electromagnetic force, causing axial vibration and torsional vibration, resulting in a reduced service life of the motor bearings and increased noise. In addition, the optimal angle of the magnetic ring skew is related to the matching of the motor poles and slots. The optimal skew angle , is the number of stator slots and rotor pole number The lowest common multiple of. In general, a set of traditional magnetic ring magnetizing fixtures corresponds to one motor pole slot combination. For different pole slot combinations with equal number of poles, magnetizing fixtures with different pole slant angles need to be made, which increases the production cost and processing cycle of the magnetizing fixture. In response to the above problems, the present invention specifically discloses a V-shaped and W-shaped magnetic ring magnetizing fixture. The magnetized magnetic ring poles are V-shaped or W-shaped, and the pole slant effect is good. After the pole slant, the cogging torque can be greatly reduced, and the motor operation noise can be reduced; the V-shaped or W-shaped slanted pole structure does not generate axial force, and runs more smoothly and with less noise than the traditional single-sided slanted pole; the V-shaped and W-shaped slanted pole angles are different, and can be applied to motors with two different pole slot combinations, reducing costs.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A magnetic ring magnetizing fixture, characterized in that: include: A housing (2), a rotating shaft (1), a V-shaped outer stator (7), a right-slanted inner stator (6), a left-slanted inner stator (9), a first outer magnetic conductive ring (3), a second outer magnetic conductive ring (8), and an inner magnetic conductive ring (5); wherein, An installation space is provided in the housing (2), and the rotating shaft (1) is rotatably installed in the installation space; The V-shaped outer stator (7) is detachably mounted in the mounting space, and the right-slanted inner stator (6) and the left-slanted inner stator (9) are detachably mounted on the rotating shaft (1); wherein the V-shaped outer stator (7) comprises an outer stator left-slanted iron core (7-1), an outer stator right-slanted iron core (7-2) and a V-shaped coil (7-3); the outer stator left-slanted iron core (7-1) and the outer stator right-slanted iron core (7-2) constitute a V-shaped iron core, and the V-shaped coil (7-3) is wound around the V-shaped iron core; the left-slanted inner stator (9) and the outer stator left-slanted iron core (7-1) are positioned and assembled, and the V-shaped outer stator (7-3) is ... and the V-shaped outer stator (7-3) is detachably mounted on the rotating shaft (1); wherein the V-shaped outer stator (7) comprises an outer stator left-slanted iron core (7-1), and the V-shaped outer stator (7-3) comprises an outer stator left- The right oblique inner stator (6) and the right oblique iron core (7-2) of the outer stator are positioned and assembled to form a V-shaped magnetic ring magnetization structure, and the V-shaped coil (7-3) is energized to generate a single-sided oblique pole magnetic field, so that the magnetic ring to be magnetized forms a V-shaped oblique pole magnetic distribution; or, the left oblique inner stator (9) and the right oblique iron core (7-2) of the outer stator are positioned and assembled, and the right oblique inner stator (6) and the left oblique iron core (7-1) of the outer stator are positioned and assembled to form a W-shaped magnetic ring magnetization structure, and the V-shaped coil (7-3) is energized to generate a bilaterally symmetrical oblique pole magnetic field, so that the magnetic ring to be magnetized forms a W-shaped oblique pole magnetic distribution; The first outer magnetic conductive ring (3) and the second outer magnetic conductive ring (8) are detachably fixedly arranged on both sides of the V-shaped outer stator (7), and the inner magnetic conductive ring (5) is detachably arranged between the right oblique inner stator (6) and the left oblique inner stator (9); wherein the first outer magnetic conductive ring (3) and the second outer magnetic conductive ring (8) are used to be arranged outside the magnetic ring to be magnetized, and the inner magnetic conductive ring (5) is used to be arranged inside the magnetic ring to be magnetized.

2. A magnetic ring magnetizing fixture according to claim 1, characterized in that: The V-shaped outer stator (7) is detachably mounted in the mounting space, and the right-slanted inner stator (6) and the left-slanted inner stator (9) are detachably mounted on the rotating shaft (1). The specific structure is as follows: The V-shaped outer stator (7) is detachably mounted in the installation space by means of a keyway connection, and the right oblique inner stator (6) and the left oblique inner stator (9) are detachably mounted on the rotating shaft (1) by means of a keyway connection; The central axes of the V-shaped outer stator (7), the right oblique inner stator (6), the left oblique inner stator (9) and the rotating shaft (1) coincide with each other.

3. A magnetic ring magnetizing fixture according to claim 2, characterized in that: The inner walls of the outer stator left oblique core (7-1) and the outer stator right oblique core (7-2) are both provided with a plurality of tooth slots evenly distributed in the circumferential direction to form stator teeth, and the number of tooth slots is equal to the number of poles to be magnetized by the magnetized magnetic ring; the coil winding direction of the V-shaped coil (7-3) follows the right-hand screw rule, and after the V-shaped coil (7-3) is energized, the polarity of the stator teeth is distributed in an NS alternating manner in the circumferential direction.

4. A magnetic ring magnetizing fixture according to claim 3, characterized in that: The outer stator left oblique iron core (7-1), the outer stator right oblique iron core (7-2), the right oblique inner stator (6), and the left oblique inner stator (9) are all formed by stacking punching sheets, and semicircular grooves are opened on the punching sheets; During processing, the punching sheets are first stacked into oblique grooves, and then keyways for positioning are processed. The keyways are located on the center line of the stator teeth.

5. The magnetic ring magnetizing fixture according to claim 4, characterized in that: The key slots of the V-shaped outer stator (7) coincide with the key slots of the left-slanted inner stator (9) and the right-slanted inner stator (6) in terms of their relative center angle positions; the stator teeth to which the key slots of the V-shaped outer stator (7), the left-slanted inner stator (9) and the right-slanted inner stator (6) face have the same winding direction, the same current flow direction during magnetization, and the same polarity is generated after magnetization.

6. The magnetic ring magnetizing fixture according to claim 3, characterized in that: The outer stator left oblique iron core (7-1) and the outer stator right oblique iron core (7-2) have the same punching sheets, the same height, the same oblique slot angle and are both , in opposite directions; the punching sheets of the left oblique inner stator (9) core and the right oblique inner stator (6) core are the same, the height is the same, the angle of the oblique slot is the same and both are , in the opposite direction.

7. The magnetic ring magnetizing fixture according to claim 6, characterized in that: When forming a V-shaped magnetic ring magnetization structure, according to the direction along the central axis of the rotating shaft (1), the left-slanted inner stator (9), the left-slanted iron core of the outer stator (7-1), the right-slanted iron core of the outer stator (7-2), and the right-slanted inner stator (6) are arranged in sequence. The magnetic poles of the magnetized magnetic ring after magnetization are V-shaped, and the magnetic ring slant pole angle is .

8. The magnetic ring magnetizing fixture according to claim 6, characterized in that: When forming a W-shaped magnetic ring magnetization structure, according to the direction along the central axis of the rotating shaft (1), the right-slanted inner stator (6), the left-slanted iron core of the outer stator (7-1), the right-slanted iron core of the outer stator (7-2), and the left-slanted inner stator (9) are arranged in sequence. The magnetic poles of the magnetized magnetic ring after magnetization are W-shaped, and the magnetic ring slant pole angle is .

9. The magnetic ring magnetizing fixture according to claim 4, characterized in that: The punching sheets are silicon steel sheet punching sheets.

10. A method for using the magnetic ring magnetizing fixture according to claim 1, characterized in that: include: A V-shaped outer stator (7) is detachably mounted in the mounting space of the housing (2), and a right-slanted inner stator (6) and a left-slanted inner stator (9) are detachably mounted on the rotating shaft (1); in the V-shaped outer stator (7), a left-slanted outer stator iron core (7-1) and a right-slanted outer stator iron core (7-2) are laminated to form a V-shaped iron core, and a V-shaped coil (7-3) is wound around the V-shaped iron core; wherein, When the magnetic ring to be magnetized needs to form a V-shaped oblique pole magnetic distribution, the left oblique inner stator (9) and the left oblique iron core (7-1) of the outer stator are positioned and assembled, and the right oblique inner stator (6) and the right oblique iron core (7-2) of the outer stator are positioned and assembled to form a V-shaped magnetic ring magnetization structure; the magnetic ring to be magnetized is installed on the magnetic ring magnetization fixture, the V-shaped outer stator (7) is outside the magnetic ring to be magnetized, the right oblique inner stator (6) and the left oblique inner stator (9) are both inside the magnetic ring to be magnetized, and the V-shaped coil (7-3) is energized to generate a unilateral oblique pole magnetic field, so that the magnetic ring to be magnetized forms a V-shaped oblique pole magnetic distribution; When the magnetic ring to be magnetized needs to form a W-shaped oblique pole magnetic distribution, the left oblique inner stator (9) and the right oblique iron core (7-2) of the outer stator are positioned and assembled, and the right oblique inner stator (6) and the left oblique iron core (7-1) of the outer stator are positioned and assembled to form a W-shaped magnetic ring magnetization structure; the magnetic ring to be magnetized is installed on the magnetic ring magnetization fixture, the V-shaped outer stator (7) is outside the magnetic ring to be magnetized, the right oblique inner stator (6) and the left oblique inner stator (9) are both inside the magnetic ring to be magnetized, and the V-shaped coil (7-3) is energized to generate a bilaterally symmetrical oblique pole magnetic field, so that the magnetic ring to be magnetized forms a W-shaped oblique pole magnetic distribution; In the magnetization process, the first outer magnetic conductive ring (3) and the second outer magnetic conductive ring (8) are detachably fixedly arranged on both sides of the V-shaped outer stator (7), and the first outer magnetic conductive ring (3) and the second outer magnetic conductive ring (8) are arranged outside the magnetic ring to be magnetized; the inner magnetic conductive ring (5) is detachably arranged between the right oblique inner stator (6) and the left oblique inner stator (9), and the inner magnetic conductive ring (5) is arranged inside the magnetic ring to be magnetized; and the first outer magnetic conductive ring (3), the second outer magnetic conductive ring (8) and the inner magnetic conductive ring (5) are coordinated to achieve the purpose of limiting the magnetic ring to be magnetized and increasing the magnetic conductivity.

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