Amorphous alloy permanent magnet motor

Abstract

The invention provides an amorphous alloy permanent magnet motor, and relates to the technical field of energy-saving permanent magnet motors, and the motor comprises a housing, a rotating shaft, a stator iron core, a rotor iron core, and permanent magnets. The stator iron core is formed by axially laminating a first silicon steel laminated iron core part and a first amorphous alloy iron core part in a staggered manner, and the rotor iron core is formed by axially laminating a second silicon steel laminated iron core part and a second amorphous alloy iron core part in a staggered manner. An even number of groups of permanent magnets are embedded in the rotor core in the radial direction, and each group of permanent magnets comprises two V-shaped magnetic pole parts to form an annular Halbach array. Each magnetic pole part comprises first, second and third permanent magnet sections which are linearly connected, and the magnetizing directions of the permanent magnet sections are respectively vertical, parallel and deviated from the V-shaped included angle. Magnetic field distribution is optimized, magnetic flux abrupt change is reduced, and motor efficiency and power density are improved. The magnetic saturation intensity can be increased while the size is reduced, and the energy-saving effect of the permanent magnet motor is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy-saving permanent magnet motors, and particularly to an amorphous alloy permanent magnet motor. Background Art

[0002] At present, an amorphous alloy permanent magnet synchronous motor is a permanent magnet synchronous motor (PMSM, Permanent Magnet Synchronous Motor) that uses amorphous alloy materials as the iron core. Due to the high magnetic permeability and low iron loss characteristics of the amorphous alloy materials, such motors can effectively reduce the iron core loss and improve the motor efficiency. At the same time, combined with the high power density advantage of the permanent magnet synchronous motor itself, it has broad application prospects in the field of high-efficiency motors.

[0003] However, in practical applications, the applicant has found that in order to ensure the magnetic saturation intensity of the permanent magnet motor, it is usually necessary to design the thickness or length of the stator iron core to be relatively large to ensure sufficient magnetic flux paths. However, this approach inevitably leads to an increase in the size of the motor, thus affecting the compactness and lightweight requirements of the overall system. On the contrary, if one attempts to reduce the size of the permanent magnet motor to make it more compact, the magnetic saturation intensity of the motor may not meet the expected requirements, affecting the output performance and stability of the motor. This technical contradiction is particularly prominent in the current design of amorphous alloy permanent magnet synchronous motors and has become an important bottleneck restricting the further optimization of this technology. Therefore, how to ensure a compact design of the permanent magnet motor on the basis of energy conservation while maintaining sufficient magnetic saturation intensity so that the motor performance meets the preset requirements has become an urgent technical problem to be solved. Summary of the Invention

[0004] The present application discloses an amorphous alloy permanent magnet motor to solve the technical problems existing in the permanent magnet motor in the related art.

[0005] The present application provides an amorphous alloy permanent magnet motor, adopting the following technical solutions: An amorphous alloy permanent magnet motor comprises a casing and a rotating shaft, and also comprises a stator core, a rotor core and a permanent magnet arranged in the casing, wherein the rotor core is arranged in the inner ring of the stator core and an air gap is reserved between the two, the permanent magnet is embedded in the inside of the rotor core, and the rotor core is sleeved on the rotating shaft; the stator core is formed by axially stacking a plurality of first silicon steel laminated core parts and a plurality of first amorphous alloy core parts in sequence, and the first silicon steel laminated core parts are staggered with the first amorphous alloy core parts; the rotor core is formed by axially stacking a plurality of second silicon steel laminated core parts and a plurality of second amorphous alloy core parts in sequence, and the second silicon steel laminated core parts are staggered with the second amorphous alloy core parts; the inner radial of the rotor core An even number of permanent magnets are embedded, each group of permanent magnets includes two magnetic poles, and the two magnetic poles in each group of permanent magnets are configured in a V shape to form an annular Halbach array; in each group of permanent magnets, along the length direction in which the two magnetic poles are close to each other, a single magnetic pole includes at least a first permanent magnet segment, a second permanent magnet segment and a third permanent magnet segment connected in a straight line, wherein the magnetic pole magnetization direction of the first permanent magnet segment is configured to be perpendicular to the length direction of the corresponding magnetic pole segment and toward the opposite side of the V-shaped angle; the magnetic pole magnetization direction of the second permanent magnet segment is configured to be parallel to the length direction of the corresponding magnetic pole segment and close to the V-shaped angle; the magnetic pole magnetization direction of the third permanent magnet segment is configured to be perpendicular to the length direction of the corresponding magnetic pole segment and away from the V-shaped angle.

[0006] Preferably, in the even-numbered array of permanent magnets, the number of permanent magnet groups is configured as a, and the number of V-shaped angles formed by the two magnetic poles in each group of permanent magnets is configured as b, wherein the relationship between a and b satisfies: b=90°+180° / a.

[0007] Preferably, the first silicon steel laminate core portion is made of refurbished silicon steel laminates, which are disassembled and recycled from scrap permanent magnet motors; and / or the second silicon steel laminate core portion is made of refurbished silicon steel laminates, which are disassembled and recycled from scrap permanent magnet motors.

[0008] Preferably, the total number of the first silicon steel laminated core part and the plurality of first amorphous alloy core parts is an odd number greater than 1; along the length direction of the stator core, both ends of the stator core are configured as first amorphous alloy core parts.

[0009] Preferably, it also includes an inner stator winding and a slot wedge body, a plurality of stator slot bodies are axially opened on the inner ring wall of the stator core, the inner stator winding is embedded in the stator slot body, and the slot wedge body is clamped on the open end of the stator slot body to confine the inner stator winding inside the stator slot body.

[0010] Preferably, the stator slot includes a kidney-shaped sub-slot, a trapezoidal sub-slot, and a rectangular sub-slot. From the inside out and along the radial direction of the stator core, the kidney-shaped sub-slot, the trapezoidal sub-slot, and the rectangular sub-slot are connected in sequence, and one end of the rectangular sub-slot away from the trapezoidal sub-slot is configured as the stator slot opening; the slot wedge body is formed by connecting a first slot wedge and a second slot wedge. The cross-sectional shape of the first slot wedge is a rectangle matching the shape of the rectangular sub-slot, and the cross-sectional shape of the second slot wedge is a trapezoid matching the trapezoidal sub-slot; the end face of the first slot wedge facing away from the second slot wedge is configured as a curved surface, and the radian of the curved surface is smoothly adapted to the inner circle radian of the stator core; the end face of the second slot wedge facing away from the first slot wedge is configured as an abutting surface, and the abutting surface is used to abut against the inner stator winding.

[0011] Preferably, an adjustment fitting is provided in the first slot wedge. The adjustment fitting has a switchable first state and second state. Wherein, when the adjustment fitting is in the first state, the adjustment fitting forms a protrusion on the curved surface and extends into the air gap to prevent the rotor core and the stator core from colliding during the installation of the rotor core inside the stator core; when the adjustment fitting is in the second state, the protrusion formed by the adjustment fitting on the curved surface contracts inward and is flush with the curved surface to maintain the spatial integrity of the air gap after the rotor core is installed inside the stator core.

[0012] Preferably, the adjustment fitting includes a sliding strip and a protruding part. The first slot wedge is provided with a sliding groove along its own length direction. The sliding strip is slidably inserted into the sliding groove. The first slot wedge is provided with a plurality of radial slots at intervals along its own length direction. The radial slots are vertically communicated with the sliding groove. The protruding part is slidably inserted into the radial slot. Wherein, the outer surface of the protruding part facing away from the sliding groove is configured as an arc surface, and the radian of the arc surface is adapted to the radian of the curved surface; when the adjustment fitting is in the first state, a part of the sliding strip extends out of the sliding groove, and at the same time, a part of the protruding part automatically extends out of the radial slot under the action of the sliding strip and is located in the air gap; when the adjustment fitting is in the second state, the sliding strip is completely located in the sliding groove, and at the same time, the protruding part automatically retracts into the radial slot under the action of the sliding strip, and the arc surface of the protruding part is flush with the curved surface.

[0013] Preferably, a plurality of hidden grooves are formed on the surface of the sliding strip. One inner wall of the hidden groove is configured as a first inclined sliding surface, and the edge portion of the protruding portion close to the sliding strip is configured as a second inclined sliding surface. The first inclined sliding surface and the second inclined sliding surface are slidably matched with each other, and the opening width of the hidden groove is greater than the thickness of the protruding portion. One inner wall of the radially grooved portion is provided with a radial limiting groove, and a radial limiting sub-portion is provided on the side wall of the protruding portion. The radial limiting sub-portion extends into the radial limiting groove, and a first spring is connected between the radial limiting sub-portion and the radial limiting groove. The first spring always has a tendency to radially pull the protruding portion into the radially grooved portion. Wherein, when the sliding strip is completely located in the sliding groove, the hidden groove is radially opposite to the protruding portion, so that the protruding portion is partially embedded in the hidden groove under the action of the first spring. At this time, the arc surface of the protruding portion is flush with the curved surface. When the sliding strip gradually moves out of the sliding groove, the protruding portion moves out of the hidden groove through the relative sliding of the first inclined sliding surface and the second inclined sliding surface, so that the protruding portion moves to the surface of the sliding strip. At this time, the arc surface of the protruding portion extends out of the radially grooved portion and is located in the air gap.

[0014] Preferably, the adjusting adapter further includes an end face limiting portion and a second spring. A limiting card slot is formed on the side wall of the sliding strip close to its outer end wall. The end face limiting portion can be embedded in the limiting card slot. The second spring is axially connected between the inner end wall of the sliding strip and the inner bottom wall of the sliding groove. The second spring always has a tendency to axially pull the sliding strip into the sliding groove. Wherein, when the end face limiting portion is embedded in the limiting card slot, the side wall of the end face limiting portion abuts against the end wall of the first groove wedge, so that the sliding strip is limited in a state where a part of the sliding strip extends out of the sliding groove. When the end face limiting portion is taken out of the limiting card slot, the sliding strip is completely received in the sliding groove under the pulling force of the second spring.

[0015] The present invention has the following advantages and beneficial effects: 1. By alternately arranging silicon steel sheets and amorphous alloys in the stator core and the rotor core, the present invention improves the magnetic flux carrying capacity of the motor, reduces the operating loss, and effectively improves the energy-saving effect. At the same time, the adoption of the V-type Halbach array makes the magnetic field concentratedly distributed, improves the air-gap magnetic density, and improves the reluctance torque characteristic while reducing the use of rare-earth permanent magnet materials, and improves the operating speed and efficiency of the motor. In addition, the introduction of the multi-segment magnetization method for the first permanent magnet segment, the second permanent magnet segment and the third permanent magnet segment further optimizes the magnetic field distribution, improves the operating stability and performance of the motor. At the same time, this permanent magnet motor can increase the magnetic saturation intensity while reducing the size, and improve the energy-saving effect during the production of the permanent magnet motor; 2. The present invention is provided with an adjustment adapter in the first slot wedge, so that during the process of installing the rotor core into the stator core, the protruding part of the adjustment adapter can protrude outward and extend into the air gap, thereby forming a buffer structure during the assembly process to prevent the rotor core from directly colliding with the stator core. When the rotor core contacts these protruding parts, even if a collision occurs, it only acts on the adjustment adapter and will not directly impact the stator core body, reducing the deformation, scratching or local damage of the core caused by mechanical impact and improving the integrity of the stator core. In addition, after the rotor core is installed, the adjustment adapter can automatically retract through the sliding strip, the limiting structure and the spring action, so that the integrity of the air gap will not be affected during the normal operation of the motor, ensuring the assembly convenience while taking into account the stability of the motor operation. This adjustable assembly protection mechanism enables the motor to better avoid failures caused by improper assembly during mass production and long-term operation, improving the production qualification rate and service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 is the external shape schematic diagram of the embodiment of the present application; Figure 2 is the structural schematic diagram for showing the connection relationship among the stator core, the rotor core, the permanent magnet and the rotating shaft in the embodiment of the present application; Figure 3 is the structural schematic diagram for showing the connection relationship among the rotor core, the permanent magnet and the rotating shaft in the embodiment of the present application; Figure 4 is the end view for showing the connection relationship among the stator core, the rotor core, the permanent magnet and the rotating shaft in the embodiment of the present application; Figure 5 is the schematic diagram of the magnetic pole magnetization direction of two magnetic pole parts in a group of permanent magnets in the embodiment of the present application; Figure 6 is the partial front view cross-sectional view for showing the installation positions of the adjustment adapter and the inner stator winding in the stator core in the embodiment of the present application; Figure 7 is the partial side view cross-sectional view for showing the positional relationship of each component inside the adjustment adapter when it is in the first state in the embodiment of the present application; Figure 8It is a partial side cross-sectional view showing the positional relationship of various components inside the adjustment adapter when it is in the second state in the embodiments of the present application.

[0018] The markings in the figure are: 100, housing; 200, rotating shaft; 300, stator core; 310, first silicon steel laminated core part; 320, first amorphous alloy core part; 330, stator slot; 331, kidney-shaped sub-slot; 332, trapezoidal sub-slot; 333, rectangular sub-slot; 400, rotor core; 410, second silicon steel laminated core part; 420, second amorphous alloy core part; 500, permanent magnet; 510, magnetic pole part; 511, first permanent magnet segment; 512, second permanent magnet segment; 513, third permanent magnet segment; 600, air gap; 700, inner stator winding; 800, slot wedge body; 810, first slot wedge; 811, curved surface; 812, sliding slot; 813, radial slot; 814, radial limiting slot; 820, second slot wedge; 821, abutting surface; 900, adjustment adapter; 910, sliding strip; 9110, hidden slot; 9111, first inclined sliding surface; 911, limiting card slot; 920, protruding part; 921, arc surface; 922, second inclined sliding surface; 923, radial limiting sub-part; 924, first spring; 930, limiting part; 940, second spring. Detailed implementation manners

[0019] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0020] The terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually of the same type, and do not limit the number of objects. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0021] Please refer to Figures 1 to 8, in some embodiments, the amorphous alloy permanent magnet motor includes a motor housing 100, a rotating shaft 200, a stator core 300, a rotor core 400, and a permanent magnet 500. Among them, the rotor core 400 is arranged inside the stator core 300 with an air gap 600 reserved therebetween. The permanent magnet 500 is embedded inside the rotor core 400, and the rotor core 400 is sleeved on the rotating shaft 200.

[0022] Furthermore, both the stator core 300 and the rotor core 400 adopt a composite structure formed by axially laminating silicon steel and amorphous alloy alternately, so as to make full use of the higher magnetic saturation intensity of silicon steel sheets and the lower iron loss characteristics of amorphous alloys, thereby improving the overall magnetic saturation intensity of the motor and reducing iron loss without increasing the overall size of the motor.

[0023] Exemplarily, in combination with Figure 2 , Figure 3 , the stator core 300 is formed by sequentially laminating a plurality of first silicon steel laminated core parts 310 and a plurality of first amorphous alloy core parts 320. The adjacent core components are arranged staggeredly in the axial direction to improve the magnetic flux carrying capacity of the stator core 300 while ensuring a compact structure. Similarly, the rotor core 400 is also formed by alternately laminating a plurality of second silicon steel laminated core parts 410 and a plurality of second amorphous alloy core parts 420, so that the rotor core 400 can effectively reduce eddy current loss while achieving a high magnetic flux carrying capacity, improving the overall operating efficiency of the motor.

[0024] Exemplarily, in combination with Figure 4 , Figure 5 , in the structural design of the rotor core 400, an even number of groups of permanent magnets 500 are radially embedded inside the rotor core 400. Each group of permanent magnets 500 is composed of two magnetic pole parts 510 and is configured to be arranged in a V shape to form a ring-shaped Halbach array. The characteristic of the Halbach array is that it can enhance the magnetic field intensity on one side while weakening the magnetic field on the other side, enabling the magnetic force lines to be concentrated in the stator winding area, increasing the magnetic density of the air gap 600, thereby reducing the usage amount of rare earth permanent magnet materials to a certain extent while improving the reluctance torque performance and operating speed of the permanent magnet motor. In this embodiment, the V-shaped magnetic pole design of the Halbach array makes the rotor magnetic field distribution more uniform, improves the sinusoidality of the air gap 600 magnetic field, enables the motor to have better electromagnetic performance during operation, and reduces electromagnetic noise and torque ripple.

[0025] It should be noted that inside the magnetic pole part 510 of each group of permanent magnets 500, a multi-segment distribution is adopted for the magnetization method, which includes a first permanent magnet segment 511, a second permanent magnet segment 512, and a third permanent magnet segment 513. The magnetization direction of the magnetic poles of the first permanent magnet segment 511 is set perpendicular to the length direction of the magnetic pole part 510 and towards the opposite side of the V-shaped angle, thereby forming a strong radial magnetic field in this area and enhancing the magnetic flux guiding effect. The magnetization direction of the magnetic poles of the second permanent magnet segment 512 is along the length direction of the magnetic pole part 510 and towards the V-shaped angle, so that this part can further adjust the magnetic flux distribution, make the overall magnetic field more uniform, and reduce the local magnetic saturation phenomenon. The magnetization direction of the magnetic poles of the third permanent magnet segment 513 is set perpendicular to the length direction of the magnetic pole part 510 and away from the V-shaped angle, so that the magnets in this part can more effectively adjust the distribution of the magnetic field in the air gap 600, make the change of the magnetic flux in the stator winding area closer to a sine wave shape, and improve the working efficiency of the motor.

[0026] By adopting such a composite iron core structure and the permanent magnets 500 arranged in a V-shaped Halbach array, the motor improves the magnetic saturation intensity without significantly increasing the volume, optimizes the power density of the overall motor, reduces the eddy current loss at the same time, and improves the efficiency of the motor. In addition, since the Halbach structure reduces the influence of the stator slotting effect and reduces the magnetic field harmonic content, the running stability of the motor is improved, thereby reducing the loss to a certain extent and improving the energy conversion efficiency. Compared with the traditional permanent magnet synchronous motor, the motor provided in this embodiment can obtain a higher magnetic flux density and a better magnetic field distribution in a smaller volume, has a good energy-saving effect, and is suitable for application scenarios with high power density, high speed, and high efficiency, such as new energy vehicles, electric aviation propulsion systems, wind power generation, and high-precision servo drives and other fields.

[0027] In summary, in this embodiment, by alternately arranging silicon steel sheets and amorphous alloys in the stator iron core 300 and the rotor iron core 400, the magnetic flux carrying capacity of the motor is improved and the running loss is reduced; at the same time, the adoption of the V-shaped Halbach array makes the magnetic field concentratedly distributed, improves the magnetic density of the air gap 600, and improves the reluctance torque characteristic while reducing the use of rare earth permanent magnet materials, and improves the working speed and efficiency of the motor. In addition, the introduction of the multi-segment magnetization method further optimizes the magnetic field distribution, improves the running stability and performance of the motor, and thus provides a more preferable technical solution for the design of high-efficiency permanent magnet motors.

[0028] In some embodiments, in order to further optimize the magnetic field distribution of the permanent magnet motor, the even-numbered array of permanent magnets 500 not only adopts a Halbach array structure with a V-shaped arrangement, but also follows a specific mathematical relationship in the design of the V-shaped angle of the magnetic pole portion 510, that is, assuming that the number of groups of permanent magnets 500 is a, the angle b of the V-shaped angle satisfies b = 90° + 180° / a. The setting of this angle relationship helps to optimize the magnetic field distribution to a certain extent, making the rotor magnetic field more uniform, and can improve the magnetic density of the air gap 600 and improve the electromagnetic performance of the motor.

[0029] Specifically, in the Halbach array, the choice of the V-shaped angle directly affects the sinusoidality of the magnetic field of the air gap 600 and the flux focusing effect. By making b and a functional relationship, the orientation of the V-shaped magnetic pole can be adjusted under different pole pairs, so that the magnetic density distribution of the air gap 600 is closer to a sine waveform, which helps to reduce the harmonic content during motor operation and reduce the magnetic field distortion caused by the stator slot effect. In addition, since the value of b changes nonlinearly with the change of a, this design method can adapt to motors with different pole pairs and is suitable for a variety of power levels and application scenarios. For example, when the number of pole pairs is small, appropriately increasing the V-shaped angle can improve the utilization rate of the magnetic field of the air gap 600, while when the number of pole pairs is large, correspondingly reducing the V-shaped angle helps to reduce the magnetic resistance effect and improve the overall power density of the motor.

[0030] From the perspective of structure and manufacturing, the setting of this angle relationship makes the arrangement of permanent magnets 500 in the rotor core 400 more regular, so that a standardized assembly method can be adopted during the manufacturing process, reducing processing and installation errors and improving the production consistency of the motor. In addition, the design can also optimize the rotor flux path, reduce the rotor eddy current loss to a certain extent, and improve the overall efficiency of the motor. Therefore, by optimizing the mathematical relationship of the V-shaped angle, the motor has better structural feasibility and stability while ensuring efficient operation, thereby improving its competitiveness in high-performance application scenarios.

[0031] In some embodiments, in order to improve material utilization and reduce manufacturing costs, the first silicon steel laminated core portion 310 and / or the second silicon steel laminated core portion 410 are made of refurbished silicon steel laminates, which are disassembled and recycled from waste permanent magnet motors. Silicon steel sheets are the main material of motor cores, with good magnetic conductivity and low iron loss, but their production process consumes a lot of energy. Therefore, by recycling silicon steel sheets in waste permanent magnet motors, it is possible to reduce resource waste to a certain extent and reduce the demand for the use of new materials.

[0032] Specifically, after the recycled silicon steel laminations are processed through screening, rust removal, cleaning, and re - coating with an insulating layer, etc., their electromagnetic properties can be restored to meet the usage requirements of the permanent magnet motor core again. On the premise of meeting the motor performance requirements, the refurbished silicon steel laminations can maintain low iron loss. And after being interleaved and laminated with the amorphous alloy core part, a reasonable magnetic flux distribution is formed, which helps to improve the overall motor efficiency. In addition, since the silicon steel laminations are recycled and reused, compared with newly produced silicon steel materials, their manufacturing cost is lower, and the carbon emissions caused by silicon steel processing can be reduced, meeting the requirements of green manufacturing and sustainable development. Therefore, through the reasonable utilization of the refurbished silicon steel laminations in this embodiment, while optimizing the motor performance, good economic and environmental benefits are achieved, providing a beneficial technical solution for the sustainable development of permanent magnet motors.

[0033] In some embodiments, in combination with Figure 2 , in order to further optimize the magnetic properties of the stator core 300, the total number of the first silicon steel lamination core part 310 and the first amorphous alloy core part 320 of the stator core 300 is set to an odd number greater than 1, and along the length direction of the stator core 300, the first amorphous alloy core parts 320 are arranged at both ends thereof. This structural design helps to improve the magnetic flux distribution of the stator core 300 to a certain extent and reduce the core loss, thereby enhancing the overall operating efficiency of the motor.

[0034] Specifically, since the amorphous alloy material has low iron loss and the silicon steel sheet has a high magnetic saturation intensity, using an odd total number of layers and ensuring that both ends of the stator core 300 are the first amorphous alloy core parts 320 can make the magnetic flux distribution of the stator core 300 more uniform and reduce the magnetic flux leakage at the ends. The first amorphous alloy core parts 320 located at both ends can reduce the eddy current loss at the ends of the stator core 300. At the same time, due to the high magnetic permeability of the amorphous alloy, the magnetic flux at the motor ends can be better conducted, thus improving the overall magnetic field characteristics. In addition, adopting an odd - layer structure can ensure a symmetric magnetic field distribution in the middle and at both ends of the stator core 300, making the electromagnetic force during motor operation more balanced, reducing vibration and noise, and thus enhancing the stability of the motor. Therefore, through the reasonable design of the lamination structure of the stator core 300 in this embodiment, while improving the motor performance, it also helps to extend the service life of the motor and enhance its comprehensive operating benefits.

[0035] In some embodiments, in combination with Figure 4 、 Figure 6, the amorphous alloy permanent magnet motor of the present application further includes an inner stator winding 700 and a slot wedge 800. A plurality of stator slots 330 are axially formed on the inner circumferential wall of the stator core 300. The inner stator winding 700 is embedded in the stator slots 330, and the slot wedge 800 is clamped at the open end of the stator slots 330 to confine the inner stator winding 700 inside the stator slots 330.

[0036] Thus, in order to improve the stability of the stator winding during the operation of the permanent magnet motor, a plurality of stator slots 330 are axially arranged on the inner circumferential wall of the stator core 300 of the motor. The inner stator winding 700 is embedded in these stator slots 330, and a slot wedge 800 is arranged at the open end of each stator slot 330 to limit the inner stator winding 700. The slot wedge 800 is fixed at the opening of the stator slot 330 by a clamping method, which helps to prevent the inner stator winding 700 from shifting or loosening due to centrifugal force or electromagnetic force during the operation of the motor to a certain extent.

[0037] Specifically, the stator winding is affected by electromagnetic force during the operation of the motor. Especially under high-speed rotation or high-load conditions, the relative position of the winding may change due to centrifugal force or electromagnetic vibration, which will affect the electromagnetic performance of the motor and even cause local short circuit or insulation damage. By arranging the slot wedge 800 at the open end of the stator slot 330, a mechanical limiting effect can be formed, so that the winding can be stably held in the stator slot 330, which helps to improve the long-term operation reliability of the motor. In addition, the material of the slot wedge 800 can be a composite material or non-magnetic metal with high strength and low magnetic permeability to reduce additional iron loss and eddy current loss and improve the overall efficiency of the motor to a certain extent. Therefore, in this embodiment, by arranging the slot wedge 800 at the opening of the stator slot 330, the mechanical stability of the winding and the adaptability to the electromagnetic environment are improved, so that the motor can still maintain good operation performance under high-load and high-speed conditions.

[0038] In some embodiments, as Figure 4 , Figure 6 shown, the stator slot 330 includes a kidney-shaped sub-slot 331, a trapezoidal sub-slot 332, and a rectangular sub-slot 333. From the inside to the outside and along the radial direction of the stator core 300, the kidney-shaped sub-slot 331, the trapezoidal sub-slot 332, and the rectangular sub-slot 333 are connected in sequence, and the end of the rectangular sub-slot 333 far from the trapezoidal sub-slot 332 is configured as the stator slot opening. Exemplarily, the slot wedge 800 is formed by connecting a first slot wedge 810 and a second slot wedge 820. The cross-sectional shape of the first slot wedge 810 is a rectangle matching the shape of the rectangular sub-slot 333, and the cross-sectional shape of the second slot wedge 820 is a trapezoid matching the trapezoidal sub-slot 332.

[0039] Exemplarily, the end face of the first slot wedge 810 facing away from the second slot wedge 820 is configured as a curved surface 811, and the radian of the curved surface 811 is smoothly adapted to the radian of the inner circle of the stator core 300.

[0040] Exemplarily, the end face of the second slot wedge 820 facing away from the first slot wedge 810 is configured as an abutting surface 821, and the abutting surface 821 is used to abut against the inner stator winding 700.

[0041] In order to improve the stability of the slot wedge body 800 in the stator slot opening and optimize its fixing effect on the stator winding, the stator slot body 330 adopts a multi-layer structure design of a kidney-shaped sub-slot 331, a trapezoidal sub-slot 332, and a rectangular sub-slot 333, and a slot wedge body 800 formed by the combination of the first slot wedge 810 and the second slot wedge 820 is configured at the stator slot opening. Specifically, the kidney-shaped sub-slot 331 of the stator slot body 330 is located at the innermost side and is connected to the trapezoidal sub-slot 332, while the trapezoidal sub-slot 332 is further connected to the outermost rectangular sub-slot 333, and one end of the rectangular sub-slot 333 away from the trapezoidal sub-slot 332 is configured as the stator slot opening. The slot wedge body 800 is jointly composed of the first slot wedge 810 and the second slot wedge 820, wherein the cross-sectional shape of the first slot wedge 810 matches that of the rectangular sub-slot 333 and is in a rectangular structure, while the cross-sectional shape of the second slot wedge 820 matches that of the trapezoidal sub-slot 332 and is in a trapezoidal structure, so that the slot wedge body 800 can be tightly embedded and stably clamped at the stator slot opening position, thereby effectively preventing loosening or detachment caused by vibration, centrifugal force, or electromagnetic force during the operation of the motor.

[0042] On this basis, in order to further improve the matching degree and stability of the slot wedge body 800, one end face of the first slot wedge 810 facing away from the second slot wedge 820 is designed as a curved surface 811, and the radian of the curved surface 811 is smoothly adapted to the radian of the inner circle of the stator core 300. This design helps the slot wedge body 800 to form a good fitting relationship with the inner surface of the stator core 300 after installation, avoiding the problem of uneven air gap 600 caused by shape mismatch. When the permanent magnet synchronous motor is running, the uniformity of the air gap 600 directly affects the electromagnetic characteristics of the motor, such as the distribution of the air gap 600 magnetic density and torque ripple. Therefore, by making the curved surface 811 of the first slot wedge 810 smoothly adapted to the radian of the inner circle of the stator core 300, the magnetic field distribution of the air gap 600 can be optimized to a certain extent, reducing magnetic field distortion, and thus reducing the electromagnetic noise during the operation of the motor.

[0043] In addition, the end face of the second slot wedge 820 facing away from the first slot wedge 810 is configured as an abutting surface 821, which directly abuts against the inner stator winding 700, thereby providing additional support and making the winding more stable during high-speed operation. This structural design can effectively reduce the vibration or position offset of the stator winding caused by electromagnetic force, avoid friction between the winding and the inner wall of the stator slot 330, and further reduce the risk of insulation damage caused by friction, improving the service life and operating reliability of the motor.

[0044] In some embodiments, in combination with Figure 6 , Figure 7 and Figure 8 , in order to protect the stator core 300 during the installation or disassembly of the rotor core 400 and maintain the integrity of the air gap 600 during motor operation, an adjustment adapter 900 is provided inside the first slot wedge 810. The adjustment adapter 900 has a switchable first state and second state to adapt to different working conditions. Among them, when the adjustment adapter 900 is in the first state, the adjustment adapter 900 forms a protrusion on the curved surface 811 and extends into the air gap 600 to prevent the rotor core 400 and the stator core 300 from colliding during the process of installing the rotor core 400 inside the stator core 300, thereby avoiding damage to the inner surface of the stator core 300 caused by assembly errors or careless operations and maintaining the integrity of the key components of the motor. Further, when the adjustment adapter 900 is in the second state, the protrusion formed by the adjustment adapter 900 on the curved surface 811 contracts inward and is flush with the curved surface 811 to maintain the spatial integrity of the air gap 600 after the rotor core 400 is installed inside the stator core 300.

[0045] On this basis, when the rotor core 400 is installed and enters the normal operation state, the adjustment adapter 900 can be switched to the second state. At this time, the protruding part on the curved surface 811 contracts inward and finally becomes flush with the curved surface 811. The purpose of this structural design is to minimize the influence of the adjustment adapter 900 on the air gap 600 during motor operation. If the protruding part of the adjustment adapter 900 is still in the air gap 600 during operation, it may cause certain interference to the magnetic field distribution of the motor. Specifically, after the protruding part enters the air gap 600, it will increase the equivalent air gap 600 length to a certain extent, resulting in an increase in magnetic resistance, weakening of the main magnetic flux, a decrease in the back electromotive force of the motor, and an impact on the overall power density and operating efficiency. In addition, the non-uniformity of the air gap 600 may cause magnetic field distortion inside the motor, thereby increasing the high-order harmonic components and further exacerbating the torque pulsation phenomenon, which may lead to an increase in motor operating noise and vibration and affect the operating stability.

[0046] In addition, the retractable structure design of the adjustment adapter 900 also helps to optimize the heat dissipation performance of the motor. Generally, the slot wedge 800 is usually made of insulating material or magnetic material, and its thermal conductivity is relatively low. If its protruding part enters the air gap 600, it may hinder the flow of the cooling air flow, affect the effective dissipation of the heat inside the motor, cause the winding temperature rise to increase, and reduce the overload capacity and long-term reliability of the motor. At the same time, under the action of the high-speed rotating rotor core 400, strong air flow and centrifugal force will be generated in the air gap 600 area. If the protruding part of the slot wedge 800 is in the air gap 600, it may be subject to additional pneumatic impact, resulting in its loosening or even falling off, thereby affecting the fixing stability of the winding, and even causing short circuit or mechanical damage in severe cases. Therefore, by retracting the protruding part of the adjustment adapter 900 into the first slot wedge 810 during the operation of the motor, the occurrence of the above problems can be effectively avoided, the stability of the air gap 600 area can be maintained, and the overall reliability and service life of the motor can be improved.

[0047] In addition, if the slot wedge 800 is made of magnetic material, its entry into the air gap 600 may have a greater impact on the magnetic field distribution in the air gap 600, may cause abnormal local magnetic flux density, and then cause additional eddy current loss and iron loss, reduce the low-loss characteristics of the stator core 300, and affect the overall efficiency of the motor. Therefore, in this embodiment, through the adjustable adapter, the requirements under different working conditions can be met before and after the operation of the motor. While improving the protection performance during the assembly process, the magnetic field distribution and heat dissipation conditions during the operation of the motor are optimized, and the working stability and long-term reliability of the motor are improved.

[0048] In some embodiments, in combination with Figure 6 , Figure 7 and Figure 8 , the adjustment adapter 900 includes a sliding strip 910 and a protruding part 920. The first slot wedge 810 is provided with a sliding groove 812 along its own length direction. The sliding strip 910 is slidably inserted into the sliding groove 812. The first slot wedge 810 is provided with a plurality of radial slots 813 at intervals along its own length direction. The radial slots 813 are vertically communicated with the sliding groove 812. The protruding part 920 is slidably inserted into the radial slots 813. Among them, the outer surface of the protruding part 920 facing away from the sliding groove 812 is configured as an arc surface 921, and the arc surface 921 is adapted to the radian of the curved surface 811.

[0049] Further, when the adjustment adapter 900 is in the first state, a part of the sliding strip 910 extends out of the sliding groove 812, and at the same time, a part of the protruding part 920 automatically extends out of the radial slot 813 under the action of the sliding strip 910 and is located in the air gap 600.

[0050] Further, when the adjustment adapter 900 is in the second state, the sliding strip 910 is completely within the sliding groove 812. Meanwhile, under the action of the sliding strip 910, the protruding portion 920 automatically retracts into the radially slotted groove 813, and the arc surface 921 of the protruding portion 920 is flush with the curved surface 811.

[0051] In some embodiments, in combination with Figure 6 、 Figure 7 and Figure 8 , a plurality of hidden grooves 9110 are formed on the surface of the sliding strip 910. One inner wall of the hidden groove 9110 is configured as a first inclined sliding surface 9111, and the angular portion of the protruding portion 920 close to the sliding strip 910 is configured as a second inclined sliding surface 922. The first inclined sliding surface 9111 and the second inclined sliding surface 922 are slidably engaged with each other, and the opening width of the hidden groove 9110 is greater than the thickness of the protruding portion 920.

[0052] Exemplarily, a radial limiting groove 814 is provided on one inner wall of the radially slotted groove 813. A radial limiting sub - portion 923 is provided on the side wall of the protruding portion 920. The radial limiting sub - portion 923 extends into the radial limiting groove 814, and a first spring 924 is connected between the radial limiting sub - portion 923 and the radial limiting groove 814. The first spring 924 always has a tendency to radially pull the protruding portion 920 into the radially slotted groove 813.

[0053] Exemplarily, when the sliding strip 910 is completely within the sliding groove 812, the hidden groove 9110 is radially opposite to the protruding portion 920, so that the protruding portion 920 is partially embedded in the hidden groove 9110 under the action of the first spring 924. At this time, the arc surface 921 of the protruding portion 920 is flush with the curved surface 811; when the sliding strip 910 gradually moves out of the sliding groove 812, the protruding portion 920 moves out of the hidden groove 9110 through the relative sliding of the first inclined sliding surface 9111 and the second inclined sliding surface 922, so that the protruding portion 920 moves to the surface of the sliding strip 910. At this time, the arc surface 921 of the protruding portion 920 extends out of the radially slotted groove 813 and is located within the air gap 600.

[0054] In some embodiments, in combination with Figure 6 、 Figure 7 and Figure 8 , the adjustment adapter 900 further includes an end - face limiting portion 930 and a second spring 940. A limiting card slot 911 is formed on the side wall of the sliding strip 910 close to its outer end wall. The end - face limiting portion 930 can be embedded in the limiting card slot 911. The second spring 940 is axially connected between the inner end wall of the sliding strip 910 and the inner bottom wall of the sliding groove 812. The second spring 940 always has a tendency to axially pull the sliding strip 910 into the sliding groove 812.

[0055] Exemplarily, when the end face limiting part 930 is embedded in the limiting card slot 911, the side wall of the end face limiting part 930 abuts against the end wall of the first groove wedge 810, so that the sliding strip 910 is limited to a state where a part of the sliding strip 910 extends out of the sliding groove 812; further, when the end face limiting part 930 is taken out from the limiting card slot 911, the sliding strip 910 is completely received into the sliding groove 812 under the pulling force of the second spring 940.

[0056] On this basis, during the motor assembly process, that is, when the rotor core 400 is installed inside the stator core 300, first, the sliding strip 910 needs to be partially pulled out along the length direction of the sliding groove 812. At this time, the opening of the hidden groove 9110 is in alignment with the protruding part 920, and the opening width of the hidden groove 9110 is greater than the thickness of the protruding part 920. Therefore, the protruding part 920 can slide relative to the first inclined sliding surface 9111 on one side of the hidden groove 9110 through its second inclined sliding surface 922, so that the protruding part 920 disengages from the hidden groove 9110 and moves outward in the radial direction. At the same time, the radial limiting sub - part 923 also stretches the first spring 924 as the protruding part 920 moves, so that a part of the protruding part 920 enters the air gap 600, thereby forming a plurality of protruding structures on the inner peripheral wall of the entire stator core 300. These protruding parts 920 play an effective protective role during the installation of the rotor core 400. If the rotor core 400 collides during assembly, only the protruding part 920 will be contacted, and it will not directly impact the body of the stator core 300, avoiding mechanical damage to the stator core 300 caused by external forces. Exemplarily, the material of the protruding part 920 is hard rubber, so that the impact force when the rotor core 400 collides with the protruding part 920 can be reduced, and the rotor core 400 is not easily damaged.

[0057] In addition, after the sliding strip 910 is partially pulled out of the sliding groove 812, the limiting card slot 911 at its outer end will also be exposed. At this time, the installer can embed the end face limiting part 930 in the limiting card slot 911. Since the side wall of the end face limiting part 930 abuts against the end wall of the first groove wedge 810, it prevents the sliding strip 910 from retracting into the sliding groove 812 under the pulling force of the second spring 940, so that the protruding part 920 is stably in the air gap 600, maintaining the first state.

[0058] When the rotor core 400 is fully installed in place and starts to operate, it is no longer necessary for the protruding portion 920 to extend into the air gap 600. Therefore, it is necessary to switch the adjustment adapter 900 to the second state, that is, to remove the influence on the air gap 600. In this case, the installer first needs to take out the end face limiting portion 930 from the limiting slot 911. After the end face limiting portion 930 loses its limiting function, the sliding strip 910 retracts into the inside of the sliding groove 812 under the pulling force of the second spring 940, and the hidden groove 9110 also moves to a position radially aligned with the protruding portion 920. During this process, the elastic force of the first spring 924 will cause the protruding portion 920 to retract into the radially grooved 813 and finally embed into the hidden groove 9110, so that the arc surface 921 of the protruding portion 920 is flush with the curved surface 811 of the first slot wedge 810 again, thereby restoring the smoothness of the inner peripheral wall of the stator core 300 and ensuring the integrity of the air gap 600 during the operation of the motor.

[0059] In summary, when the motor is operating, the protruding portion 920 of the adjustment adapter 900 will not extend into the air gap 600, so it will not additionally increase the length of the equivalent air gap 600, thereby reducing the magnetic resistance, improving the main magnetic flux capacity of the motor, avoiding the decrease of the back electromotive force, and improving the power density and operating efficiency of the motor. Secondly, this structure can effectively avoid the influence of the protrusion of the slot wedge body 800 on the uniformity of the air gap 600 magnetic field, thereby preventing the increase of high-order harmonic components, reducing the torque ripple phenomenon, reducing the operating noise and vibration of the motor, and making the motor operate more smoothly during the operation. In addition, since the protruding portion 920 is completely received inside the slot wedge body 800 in the operating state, the air gap 600 area will not affect the flow of the cooling air flow due to its existence, thereby optimizing the heat dissipation performance of the motor, reducing the winding temperature rise, and improving the reliability and overload capacity of the motor. At the same time, this design can avoid the strong air flow and centrifugal force generated by the high-speed rotating rotor core 400 in the air gap 600 from causing additional impact on the slot wedge body 800, reducing the risk of loosening or falling off of the slot wedge body 800, improving the fixing stability of the winding, and reducing the risk of short circuit or damage caused by mechanical loosening. Finally, if the slot wedge body 800 is made of magnetic material, its entry into the air gap 600 may affect the magnetic field distribution in the air gap 600, causing additional eddy current losses and iron losses, and reducing the overall efficiency of the motor. However, in this embodiment, by completely receiving the protruding portion 920 in the operating state, the influence of the magnetic material on the motor magnetic field is avoided, so that the motor can operate stably at a higher operating efficiency.

[0060] Exemplarily, in order to facilitate the removal of the end face limiting portion 930 from the limiting card slot 911, a groove is provided at the top of the end face limiting portion 930, and a hook ring is hinged in the groove. The installer can hook the hook ring with a hook and then pull the end face limiting portion 930 out of the limiting card slot 911, making the operation more convenient. Similarly, a groove can also be provided on the end wall of the sliding strip 910 away from the sliding groove 812, and a hook ring is hinged in the groove. The installer can hook the hook ring with a hook and then pull the sliding strip 910 out of the sliding groove 812, thereby pulling the sliding strip 910 out of the sliding groove 812.

[0061] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. An amorphous alloy permanent magnet motor, comprising a housing (100) and a rotating shaft (200), characterized in that, It also includes a stator core (300), a rotor core (400), and a permanent magnet (500) arranged in the housing (100); the rotor core (400) is arranged in the inner ring of the stator core (300) with an air gap (600) reserved between the two; the permanent magnet (500) is embedded in the rotor core (400); and the rotor core (400) is sleeved on the rotating shaft (200); The stator core (300) is formed by sequentially axially stacking a plurality of first silicon steel laminated core parts (310) and a plurality of first amorphous alloy core parts (320), and the first silicon steel laminated core parts (310) and the first amorphous alloy core parts (320) are connected in an alternating manner; The rotor core (400) is formed by sequentially axially stacking a plurality of second silicon steel laminated core parts (410) and a plurality of second amorphous alloy core parts (420), and the second silicon steel laminated core parts (410) and the second amorphous alloy core parts (420) are connected in an alternating manner; An even number of permanent magnets (500) are radially embedded in the rotor core (400), each group of permanent magnets (500) comprising two magnetic pole portions (510), and the two magnetic pole portions (510) in each group of permanent magnets (500) are configured in a V shape to form an annular Halbach array; In each group of permanent magnets (500), along the length direction in which the two magnetic pole portions (510) are close to each other, a single magnetic pole portion (510) comprises at least a first permanent magnet segment (511), a second permanent magnet segment (512), and a third permanent magnet segment (513) connected in a straight line, wherein: The magnetic pole magnetization direction of the first permanent magnetic segment (511) is configured to be perpendicular to the length direction of the corresponding magnetic pole portion (510) and to be oriented toward the opposite side of the V-shaped angle; The magnetic pole magnetization direction of the second permanent magnetic segment (512) is configured to be parallel to the length direction of the corresponding magnetic pole portion (510) and close to the V-shaped angle; The magnetic pole magnetization direction of the third permanent magnet segment (513) is configured to be perpendicular to the length direction of the corresponding magnetic pole portion (510) and away from the V-shaped angle.

2. The amorphous alloy permanent magnet motor according to claim 1, wherein In an even number of groups of permanent magnets (500), the number of groups of permanent magnets (500) is configured as a, and the number of V-shaped angles formed by two magnetic poles (510) in each group of permanent magnets (500) is configured as b, wherein: The relationship between a and b satisfies: b=90°+180° / a.

3. The amorphous alloy permanent magnet motor according to claim 1, characterized in that, The first silicon steel laminate core part (310) is made of refurbished silicon steel laminates, which are disassembled and recycled from waste permanent magnet motors; and / or the second silicon steel laminate core part (410) is made of refurbished silicon steel laminates, which are disassembled and recycled from waste permanent magnet motors.

4. An amorphous alloy permanent magnet motor according to claim 3, characterized in that, The total number of the first silicon steel laminated iron core part (310) and the plurality of first amorphous alloy iron core parts (320) is an odd number greater than 1; Along the length direction of the stator core (300), both ends of the stator core (300) are configured as first amorphous alloy core parts (320).

5. A kind of amorphous alloy permanent magnet motor according to any one of claims 1-4, characterized in that, It further includes an inner stator winding (700) and a slot wedge body (800). A plurality of stator slots (330) are axially formed on the inner circumferential wall of the stator core (300). The inner stator winding (700) is embedded in the stator slots (330), and the slot wedge body (800) is clamped to the open end of the stator slots (330) to limit the inner stator winding (700) inside the stator slots (330).

6. The amorphous alloy permanent magnet motor according to claim 5, wherein The stator slots (330) include a kidney-shaped sub-slot (331), a trapezoidal sub-slot (332), and a rectangular sub-slot (333). From the inside out and along the radial direction of the stator core (300), the kidney-shaped sub-slot (331), the trapezoidal sub-slot (332), and the rectangular sub-slot (333) are sequentially connected, and one end of the rectangular sub-slot (333) far from the trapezoidal sub-slot (332) is configured as a stator slot opening; The slot wedge body (800) is formed by connecting a first slot wedge (810) and a second slot wedge (820). The cross-sectional shape of the first slot wedge (810) is a rectangle matching the shape of the rectangular sub-slot (333), and the cross-sectional shape of the second slot wedge (820) is a trapezoid matching the trapezoidal sub-slot (332); The end face of the first slot wedge (810) facing away from the second slot wedge (820) is configured as a curved surface (811), and the radian of the curved surface (811) is smoothly adapted to the inner circumferential radian of the stator core (300); The end face of the second slot wedge (820) facing away from the first slot wedge (810) is configured as an abutting surface (821), and the abutting surface (821) is used to abut against the inner stator winding (700).

7. The amorphous alloy permanent magnet motor according to claim 6, characterized in that, An adjustment adapter (900) is provided in the first slot wedge (810). The adjustment adapter (900) has a switchable first state and second state, where, When the adjustment adapter (900) is in the first state, the adjustment adapter (900) forms a protrusion on the curved surface (811) and extends into the air gap (600) to prevent the rotor core (400) and the stator core (300) from bumping during the installation of the rotor core (400) inside the stator core (300); When the adjustment adapter (900) is in the second state, the protrusion formed by the adjustment adapter (900) on the curved surface (811) contracts inward and is flush with the curved surface (811) to maintain the spatial integrity of the air gap (600) after the rotor core (400) is installed inside the stator core (300).

8. The amorphous alloy permanent magnet motor according to claim 7, characterized in that, The adjustment adapter (900) includes a sliding strip (910) and a protruding portion (920). The first slot wedge (810) is provided with a sliding groove (812) along its own length direction. The sliding strip (910) is slidably inserted into the sliding groove (812). The first slot wedge (810) is provided with a plurality of radial grooves (813) at intervals along its own length direction. The radial grooves (813) are vertically communicated with the sliding groove (812). The protruding portion (920) is slidably inserted into the radial grooves (813), where, The outer surface of the protruding portion (920) facing away from the sliding groove (812) is configured as an arc surface (921), and the radian of the arc surface (921) is adapted to the radian of the curved surface (811); When the adjusting adapter (900) is in the first state, a part of the sliding strip (910) extends out of the sliding groove (812), and at the same time, a part of the protruding portion (920) automatically extends out of the radial slot (813) under the action of the sliding strip (910) and is located in the air gap (600); When the adjusting adapter (900) is in the second state, the sliding strip (910) is completely located in the sliding groove (812), and at the same time, the protruding portion (920) automatically retracts into the radial slot (813) under the action of the sliding strip (910), and the arc surface (921) of the protruding portion (920) is flush with the curved surface (811).

9. The amorphous alloy permanent magnet motor according to claim 8, wherein, A plurality of hidden grooves (9110) are formed on the surface of the sliding strip (910). One inner wall of the hidden groove (9110) is configured as a first inclined sliding surface (9111). The edge portion of the protruding portion (920) close to the sliding strip (910) is configured as a second inclined sliding surface (922). The first inclined sliding surface (9111) and the second inclined sliding surface (922) can be slidably matched with each other, and the opening width of the hidden groove (9110) is greater than the thickness of the protruding portion (920); A radial limiting groove (814) is provided on one inner wall of the radial slot (813). A radial limiting sub-portion (923) is provided on the side wall of the protruding portion (920). The radial limiting sub-portion (923) extends into the radial limiting groove (814), and a first spring (924) is connected between the radial limiting sub-portion (923) and the radial limiting groove (814). The first spring (924) always has a tendency to radially pull the protruding portion (920) into the radial slot (813); wherein, When the sliding strip (910) is completely located in the sliding groove (812), the hidden groove (9110) is radially opposite to the protruding portion (920), so that a part of the protruding portion (920) is embedded in the hidden groove (9110) under the action of the first spring (924). At this time, the arc surface (921) of the protruding portion (920) is flush with the curved surface (811); When the sliding strip (910) gradually moves out of the sliding groove (812), the protruding portion (920) moves out of the hidden groove (9110) through the relative sliding of the first inclined sliding surface (9111) and the second inclined sliding surface (922), so that the protruding portion (920) moves to the surface of the sliding strip (910). At this time, the arc surface (921) of the protruding portion (920) extends out of the radial slot (813) and is located in the air gap (600).

10. A kind of amorphous alloy permanent magnet motor according to claim 9, characterized in that, The adjustment adapter (900) further includes an end face limiting portion (930) and a second spring (940). A limiting card slot (911) is formed in the side wall of the sliding strip (910) near its outer end wall. The end face limiting portion (930) can be embedded in the limiting card slot (911). The second spring (940) is axially connected between the inner end wall of the sliding strip (910) and the inner bottom wall of the sliding groove (812). The second spring (940) always has a tendency to axially pull the sliding strip (910) into the sliding groove (812). Among them, When the end face limiting portion (930) is embedded in the limiting card slot (911), the side wall of the end face limiting portion (930) abuts against the end wall of the first groove wedge (810), so that the sliding strip (910) is limited in a state where a part of the sliding strip (910) extends out of the sliding groove (812); When the end face limiting portion (930) is taken out of the limiting card slot (911), the sliding strip (910) is completely received in the sliding groove (812) under the pulling force of the second spring (940).

Images