Amorphous alloy permanent magnet motor

Abstract

This invention provides an amorphous alloy permanent magnet motor, relating to the field of energy-saving permanent magnet motor technology. The motor includes a housing, a shaft, a stator core, a rotor core, and permanent magnets. The stator core is formed by alternating axial stacking of a first silicon steel laminated core portion and a first amorphous alloy core portion. The rotor core is formed by alternating axial stacking of a second silicon steel laminated core portion and a second amorphous alloy core portion. An even number of permanent magnets are radially embedded within the rotor core, each group containing two V-shaped magnetic pole portions, forming a ring-shaped Halbach array. Each magnetic pole portion includes a first, second, and third permanent magnet segment connected in a straight line. This invention optimizes the magnetic field distribution, reduces magnetic flux abrupt changes, and improves motor efficiency and power density. This invention can increase magnetic saturation intensity while reducing size, thus improving the energy-saving effect of the permanent magnet motor.

Description

Technical Field

[0001] This invention relates to the field of energy-saving permanent magnet motor technology, and in particular to an amorphous alloy permanent magnet motor. Background Technology

[0002] Currently, amorphous alloy permanent magnet synchronous motors (PMSMs) are a type of permanent magnet synchronous motor that uses amorphous alloy materials as its core. Due to the high permeability and low iron loss characteristics of amorphous alloy materials, these motors can effectively reduce core losses and improve motor efficiency. Combined with the high power density inherent in permanent magnet synchronous motors, they have broad application prospects in the field of high-efficiency motors.

[0003] However, in practical applications, the applicant has found that to ensure the magnetic saturation strength of permanent magnet motors, the stator core typically needs to be designed to be thicker or longer to ensure sufficient magnetic flux path. This inevitably leads to an increase in motor size, thus affecting the overall system's compactness and lightweight requirements. Conversely, if attempts are made to reduce the size of the permanent magnet motor to make it more compact, the magnetic saturation strength may not meet the expected requirements, affecting the motor's output performance and stability. This technical contradiction is particularly prominent in the current design of amorphous alloy permanent magnet synchronous motors, becoming a significant bottleneck restricting further optimization of this technology. Therefore, how to ensure a compact design of permanent magnet motors while maintaining sufficient magnetic saturation strength to achieve the preset performance requirements has become an urgent technical problem to be solved. Summary of the Invention

[0004] This application discloses an amorphous alloy permanent magnet motor to solve the technical problems existing in permanent magnet motors in related technologies.

[0005] This application provides an amorphous alloy permanent magnet motor, which adopts the following technical solution:

[0006] An amorphous alloy permanent magnet motor includes a housing and a shaft, and further includes a stator core, a rotor core, and a permanent magnet disposed within the housing. The rotor core is located within the inner ring of the stator core with an air gap between them. The permanent magnet is embedded inside the rotor core, and the rotor core is sleeved on the shaft. The stator core is formed by sequentially and axially stacking multiple first silicon steel laminated core portions and multiple first amorphous alloy core portions, with the first silicon steel laminated core portions and the first amorphous alloy core portions being alternately connected. The rotor core is formed by sequentially and axially stacking multiple second silicon steel laminated core portions and multiple second amorphous alloy core portions, with the second silicon steel laminated core portions and the second amorphous alloy core portions being alternately connected. The rotor core is composed of interleaved sections of crystalline alloy iron. An even number of permanent magnets are radially embedded within the core, each group containing two magnetic pole sections. These two pole sections are arranged in a V-shape to form a ring-shaped Halbach array. Within each group, along the length of the two magnetic pole sections approaching each other, each pole section includes at least a first, second, and third permanent magnet segment connected in a straight line. The core also includes an inner stator winding and slot wedges. Multiple stator slots are axially formed on the inner wall of the stator core. The inner stator winding is embedded within these slots, and the slot wedges engage with the openings of the slots to confine the inner stator winding within the stator. Inside the slot body; the stator slot body includes a waist-shaped sub-slot, a trapezoidal sub-slot, and a rectangular sub-slot, which are connected sequentially from the inside out along the radial direction of the stator core. The 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 curvature of the curved surface smoothly matches the curvature of the inner ring of the stator core. The second slot wedge faces away from the first slot wedge. The end face is configured as an abutment surface, and the abutment surface is used to abut against the inner stator winding; an adjustment adapter is provided in the first slot wedge, the adjustment adapter having a switchable first state and a second state, wherein, when the adjustment adapter is in the first state, the adjustment adapter forms a protrusion outward on the curved surface and extends into the air gap to prevent the rotor core from colliding with the stator core during the installation process; when the adjustment adapter is in the second state, the protrusion formed outward on the curved surface by the adjustment adapter retracts inward and becomes flush with the curved surface to maintain the spatial integrity of the air gap after the rotor core is installed into the stator core.

[0007] Preferably, in the even-numbered array of permanent magnets, the number of groups of permanent magnets is configured as a, and the V-angle 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.

[0008] Preferably, the first silicon steel lamination core portion is made of refurbished silicon steel laminations, which are disassembled and recycled from scrap permanent magnet motors; and / or, the second silicon steel lamination core portion is made of refurbished silicon steel laminations, which are disassembled and recycled from scrap permanent magnet motors.

[0009] Preferably, the total number of the first silicon steel laminated core portion and the plurality of first amorphous alloy core portions 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 portions.

[0010] Preferably, the adjusting adapter includes a sliding bar and a protrusion. The first slotted wedge has a sliding groove along its length, and the sliding bar is slidably inserted into the sliding groove. The first slotted wedge has multiple radial slots spaced apart along its length, and the radial slots are perpendicularly connected to the sliding groove. The protrusion is slidably inserted into the radial slot. The outer surface of the protrusion facing away from the sliding groove is configured as an arc surface, and the arc surface matches the curvature of the curved surface. When the adjusting adapter is in the first state, part of the sliding bar extends out of the sliding groove, and part of the protrusion automatically extends out of the radial slot and is located in the air gap under the action of the sliding bar. When the adjusting adapter is in the second state, the sliding bar is completely in the sliding groove, and the protrusion automatically retracts into the radial slot under the action of the sliding bar, and the arc surface of the protrusion is flush with the curved surface.

[0011] Preferably, the surface of the sliding strip is provided with a plurality of hidden grooves, one inner wall of the hidden groove is configured as a first inclined sliding surface, and the corner portion of the protrusion near the sliding strip is configured as a second inclined sliding surface. The first inclined sliding surface and the second inclined sliding surface can slide relative to each other, and the opening width of the hidden groove is greater than the thickness of the protrusion. One inner wall of the radial groove is provided with a radial limiting groove, and the side wall of the protrusion is provided with a radial limiting sub-part. The radial limiting sub-part extends into the radial limiting groove, and a first spring is connected between the radial limiting sub-part and the radial limiting groove. The spring always tends to pull the protrusion radially into the radial slot; wherein, when the sliding bar is completely in the sliding slot, the hidden slot is radially opposite to the protrusion, so that the protrusion is partially embedded in the hidden slot under the action of the first spring, at which time the arc surface of the protrusion is flush with the curved surface; when the sliding bar gradually moves out of the sliding slot, the protrusion moves out of the hidden slot through the relative sliding of the first inclined sliding surface and the second inclined sliding surface, so that the protrusion moves to the surface of the sliding bar, at which time the arc surface of the protrusion extends out of the radial slot and is located in the air gap.

[0012] Preferably, the adjusting adapter further includes an end face limiting part and a second spring. A limiting groove is formed on the side wall of the sliding bar near its outer end wall. The end face limiting part can be embedded in the limiting groove. The second spring is axially connected between the inner end wall of the sliding bar and the inner bottom wall of the sliding groove. The second spring always has the tendency to pull the sliding bar axially into the sliding groove. When the end face limiting part is embedded in the limiting groove, the side wall of the end face limiting part abuts against the end wall of the first groove wedge, so that the sliding bar is limited to a state where the part of the sliding bar extends out of the sliding groove. When the end face limiting part is removed from the limiting groove, the sliding bar is completely retracted into the sliding groove under the pulling force of the second spring.

[0013] The present invention has the following advantages and beneficial effects:

[0014] 1. This invention improves the magnetic flux carrying capacity of the motor and reduces operating losses by interleaving silicon steel sheets and amorphous alloys in the stator and rotor cores, effectively enhancing energy efficiency. Simultaneously, the adoption of a V-type Halbach array concentrates the magnetic field distribution, increasing the air gap magnetic density and improving reluctance torque characteristics while reducing the use of rare-earth permanent magnet materials, thus increasing the motor's operating speed and efficiency. Furthermore, the introduction of a multi-segment magnetization method (first, second, and third permanent magnet segments) further optimizes the magnetic field distribution, improving both the motor's operational stability and performance. This permanent magnet motor can also increase magnetic saturation intensity while reducing its size, improving energy efficiency during manufacturing.

[0015] 2. This invention incorporates an adjusting adapter within the first slot wedge. During the installation of the rotor core into the stator core, the protruding portion of the adjusting adapter extends outwards and into the air gap, forming a buffer structure during assembly and preventing direct collision between the rotor and stator cores. When the rotor core contacts these protrusions, even if a collision occurs, it only affects the adjusting adapter and does not directly impact the stator core body, reducing core deformation, scratches, or localized damage caused by mechanical impact and improving the integrity of the stator core. Furthermore, after the rotor core is installed, the adjusting adapter automatically retracts through a sliding bar, limiting structure, and spring action, ensuring that the integrity of the air gap is not affected during normal motor operation, guaranteeing both assembly convenience and motor operational stability. This adjustable assembly protection mechanism allows the motor to better avoid malfunctions caused by improper assembly during mass production and long-term operation, improving the motor's production qualification rate and service life. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the external appearance of an embodiment of this application;

[0018] Figure 2 This is a structural schematic diagram in the embodiments of this application used to illustrate the connection relationship between the stator core, rotor core, permanent magnet and shaft;

[0019] Figure 3 This is a structural schematic diagram illustrating the connection relationship between the rotor core, permanent magnet, and rotating shaft in an embodiment of this application;

[0020] Figure 4 This is an end view showing the connection relationship between the stator core, rotor core, permanent magnet and shaft in the embodiments of this application;

[0021] Figure 5 This is a schematic diagram illustrating the magnetization direction of two magnetic poles in a set of permanent magnets in an embodiment of this application;

[0022] Figure 6 This is a partial front sectional view of the installation position of the adjustment adapter and the inner stator winding in the stator core in the embodiments of this application;

[0023] Figure 7 This is a partial side sectional view showing the positional relationship of the various internal components of the adjustment adapter when it is in the first state in this embodiment of the application.

[0024] Figure 8 This is a partial side sectional view showing the positional relationship of the various internal components of the adjustment adapter when it is in the second state in this embodiment of the application.

[0025] The diagram is marked as follows:

[0026] 100. Housing; 200. Shaft; 300. Stator core; 310. First silicon steel laminated core section; 320. First amorphous alloy core section; 330. Stator slot; 331. Oval sub-slot; 332. Trapezoidal sub-slot; 333. Rectangular sub-slot; 400. Rotor core; 410. Second silicon steel laminated core section; 420. Second amorphous alloy core section; 500. Permanent magnet; 510. Magnetic pole section; 511. First permanent magnet section; 512. Second permanent magnet section; 513. Third permanent magnet section; 600. Air gap; 700. Inner stator Winding; 800, Slot wedge; 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, Adjusting adapter; 910, Sliding bar; 9110, Hidden slot; 9111, First inclined sliding surface; 911, Limiting slot; 920, Protrusion; 921, Arc surface; 922, Second inclined sliding surface; 923, Radial limiting sub-part; 924, First spring; 930, Limiting part; 940, Second spring. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0028] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0029] Please see Figures 1 to 8 In some embodiments, the amorphous alloy permanent magnet motor includes a housing 100, a shaft 200, a stator core 300, a rotor core 400, and a permanent magnet 500. The rotor core 400 is disposed within the inner ring of the stator core 300 with an air gap 600 between them. The permanent magnet 500 is embedded inside the rotor core 400, and the rotor core 400 is fitted onto the shaft 200.

[0030] Furthermore, both the stator core 300 and the rotor core 400 adopt a composite structure of silicon steel and amorphous alloy interleaved axially stacked to fully utilize the high magnetic saturation strength of silicon steel sheets and the low iron loss characteristics of amorphous alloy, thereby improving the overall magnetic saturation strength of the motor and reducing iron loss without increasing the overall size of the motor.

[0031] For example, in combination Figure 2 , Figure 3 The stator core 300 is formed by sequentially stacking multiple first silicon steel lamination core portions 310 and multiple first amorphous alloy core portions 320. Adjacent core components are staggered 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 staggered stacking of multiple second silicon steel lamination core portions 410 and multiple second amorphous alloy core portions 420, enabling the rotor core 400 to achieve high magnetic flux carrying capacity while effectively reducing eddy current losses and improving the overall operating efficiency of the motor.

[0032] For example, in combination Figure 4 , Figure 5In the structural design of the rotor core 400, an even number of permanent magnets 500 are radially embedded inside the rotor core 400. Each group of permanent magnets 500 consists of two magnetic poles 510, arranged in a V-shape to form a ring-shaped Halbach array. The Halbach array is characterized by its ability to enhance the magnetic field strength on one side while weakening the magnetic field on the other side, allowing the magnetic field lines to be concentrated in the stator winding region, increasing the magnetic density of the air gap 600, thereby reducing the amount of rare-earth permanent magnet material used 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 sinusoidal nature of the magnetic field in the air gap 600, and gives the motor better electromagnetic performance during operation, reducing electromagnetic noise and torque pulsation.

[0033] It is worth noting that the magnetization method inside the magnetic pole section 510 of each group of permanent magnets 500 adopts a multi-segment distribution, including the first permanent magnet segment 511, the second permanent magnet segment 512 and the third permanent magnet segment 513.

[0034] By employing this composite core structure and a V-shaped Halbach array of permanent magnets 500, the motor improves magnetic saturation intensity without significantly increasing its size, thereby optimizing the overall power density and reducing eddy current losses, thus improving efficiency. Furthermore, the Halbach structure reduces the impact of stator cogging effects and lowers magnetic field harmonic content, improving the motor's operational smoothness, which in turn reduces losses and improves energy conversion efficiency. Compared to traditional permanent magnet synchronous motors, the motor provided in this embodiment achieves higher magnetic flux density and better magnetic field distribution within a smaller volume, resulting in better energy savings. It is suitable for high-power-density, high-speed, and high-efficiency applications, such as new energy vehicles, electric aviation propulsion systems, wind power generation, and high-precision servo drives.

[0035] In summary, this embodiment improves the magnetic flux carrying capacity of the motor and reduces operating losses by alternately setting silicon steel sheets and amorphous alloys in the stator core 300 and rotor core 400. Simultaneously, the use of a V-type Halbach array concentrates the magnetic field distribution, increasing the magnetic density in the air gap 600 and improving reluctance torque characteristics while reducing the use of rare-earth permanent magnet materials, thus enhancing the motor's operating speed and efficiency. Furthermore, the introduction of a multi-stage magnetization method further optimizes the magnetic field distribution, improving both the motor's operational stability and performance, thereby providing a more optimized technical solution for the design of high-efficiency permanent magnet motors.

[0036] In some implementations, to further optimize the magnetic field distribution of the permanent magnet motor, the even-numbered arrays of permanent magnets 500 not only employ a V-shaped Halbach array structure, but also follow a specific mathematical relationship in the design of the V-shaped included angle of the magnetic pole section 510. Specifically, if the number of groups of permanent magnets 500 is *a*, then the V-shaped included angle *b* satisfies *b* = 90° + 180° / a. This angular relationship helps to optimize the magnetic field distribution to a certain extent, making the rotor magnetic field more uniform and improving the magnetic density in the air gap 600, thereby enhancing the electromagnetic performance of the motor.

[0037] Specifically, in the Halbach array, the choice of the V-angle directly affects the sinusoidal nature of the magnetic field in the air gap 600 and the flux focusing effect. By making b a function of a, the orientation of the V-pole can be adjusted for different numbers of pole pairs, making the magnetic flux density distribution in the air gap 600 closer to a sinusoidal waveform. This helps reduce the harmonic content during motor operation and minimizes magnetic field distortion caused by stator cogging effects. Furthermore, since the value of b changes non-linearly with a, this design can adapt to motors with different numbers of pole pairs and is suitable for various power levels and applications. For example, when the number of pole pairs is small, appropriately increasing the V-angle can improve the utilization rate of the air gap 600 magnetic field, while when the number of pole pairs is large, correspondingly decreasing the V-angle helps reduce the reluctance effect and increase the overall power density of the motor.

[0038] From a structural and manufacturing perspective, this angular relationship allows for a more regular arrangement of the permanent magnets 500 within the rotor core 400. This enables standardized assembly methods during manufacturing, reducing processing and installation errors and improving the consistency of motor production. Furthermore, this design optimizes the rotor flux path, reducing rotor eddy current losses to some extent and improving the overall efficiency of the motor. Therefore, by optimizing the mathematical relationship of the V-angle, the motor achieves both high-efficiency operation and good structural feasibility and stability, thereby enhancing its competitiveness in high-performance applications.

[0039] In some embodiments, 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 dismantled and recycled from scrap permanent magnet motors. Silicon steel sheets are the main material of motor cores, possessing good magnetic permeability and low iron loss, but their production process is energy-intensive. Therefore, by recycling silicon steel sheets from scrap permanent magnet motors, resource waste can be reduced to some extent, and the need for new materials can be decreased.

[0040] Specifically, after processing such as screening, rust removal, cleaning, and recoating with an insulating layer, the recycled silicon steel laminations can have their electromagnetic properties restored, allowing them to once again meet the requirements for use in permanent magnet motor cores. The refurbished silicon steel laminations, while meeting motor performance requirements, maintain low iron losses and, after being interleaved with the amorphous alloy core, form a reasonable magnetic flux distribution, contributing to improved overall motor efficiency. Furthermore, because the silicon steel laminations are recycled and reused, their manufacturing cost is lower than that of newly produced silicon steel, and carbon emissions from silicon steel processing are reduced, aligning with the needs of green manufacturing and sustainable development. Therefore, this embodiment, by rationally utilizing refurbished silicon steel laminations, optimizes motor performance while achieving good economic and environmental benefits, providing a beneficial technical solution for the sustainable development of permanent magnet motors.

[0041] In some implementations, combined with Figure 2 To further optimize the magnetic properties of the stator core 300, the total number of the first silicon steel laminated core portion 310 and the first amorphous alloy core portion 320 of the stator core 300 is set to an odd number greater than 1, and the first amorphous alloy core portion 320 is arranged at both ends along the length direction of the stator core 300. This structural design helps to improve the magnetic flux distribution of the stator core 300 and reduce core losses to a certain extent, thereby improving the overall operating efficiency of the motor.

[0042] Specifically, due to the lower iron loss of amorphous alloy materials and the higher magnetic saturation intensity of silicon steel sheets, an odd number of layers is used, ensuring that both ends of the stator core 300 are first amorphous alloy core sections 320. This results in a more uniform magnetic flux distribution in the stator core 300 and reduces magnetic flux leakage at the ends. The first amorphous alloy core sections 320 located at both ends reduce eddy current losses at the ends of the stator core 300. Furthermore, the high permeability of the amorphous alloy allows for better conduction of magnetic flux at the motor ends, thus improving the overall magnetic field characteristics. In addition, the odd-layer structure ensures a symmetrical magnetic field distribution in the middle and at both ends of the stator core 300, resulting in a more balanced electromagnetic force during motor operation, reducing vibration and noise, and improving motor stability. Therefore, this embodiment, through the rational design of the stator core 300's layered structure, not only improves motor performance but also helps extend the motor's service life and enhance its overall operational efficiency.

[0043] In some implementations, combined with Figure 4 , Figure 6The amorphous alloy permanent magnet motor of this application also includes an inner stator winding 700 and a slot wedge 800. Multiple stator slots 330 are axially opened on the inner ring wall of the stator core 300. The inner stator winding 700 is embedded in the stator slot 330, and the slot wedge 800 is engaged with the open end of the stator slot 330 to limit the inner stator winding 700 inside the stator slot 330.

[0044] Therefore, to improve the stability of the stator winding during the operation of the permanent magnet motor, multiple stator slots 330 are provided axially on the inner ring wall of the stator core 300. The inner stator winding 700 is embedded in these stator slots 330, and a slot wedge 800 is provided at the opening 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 snap-fit ​​method, which helps to prevent the inner stator winding 700 from shifting or loosening due to centrifugal force or electromagnetic force during motor operation.

[0045] Specifically, during motor operation, the stator windings are subjected to electromagnetic forces, especially under high-speed rotation or high-load conditions. Centrifugal force or electromagnetic vibration may cause changes in the relative position of the windings, affecting the motor's electromagnetic performance and potentially leading to partial short circuits or insulation damage. By providing a slot wedge 800 at the opening end of the stator slot 330, a mechanical limiting effect can be achieved, ensuring the windings are stably held within the stator slot 330, thereby improving the long-term operational reliability of the motor. Furthermore, the slot wedge 800 can be made of high-strength, low-permeability composite materials or non-magnetic metals to reduce additional iron losses and eddy current losses, and to some extent improve the overall efficiency of the motor. Therefore, this embodiment, by providing a slot wedge 800 at the opening of the stator slot 330, enhances the mechanical stability and electromagnetic environment adaptability of the windings, enabling the motor to maintain good operating performance under high load and high-speed conditions.

[0046] In some implementations, such as Figure 4 , Figure 6 As shown, the stator slot 330 includes a waist-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 waist-shaped sub-slot 331, the trapezoidal sub-slot 332, and the rectangular sub-slot 333 are connected sequentially, and the end of the rectangular sub-slot 333 away from the trapezoidal sub-slot 332 is configured as a stator slot opening. For example, 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 rectangular, matching the shape of the rectangular sub-slot 333, and the cross-sectional shape of the second slot wedge 820 is trapezoidal, matching the shape of the trapezoidal sub-slot 332.

[0047] For example, 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 curvature of the curved surface 811 is smoothly adapted to the curvature of the inner ring of the stator core 300.

[0048] For example, the end face of the second slot wedge 820 facing away from the first slot wedge 810 is configured as an abutment surface 821, and the abutment surface 821 is used to abut against the inner stator winding 700.

[0049] To improve the stability of the slot wedge 800 within the stator slot opening and optimize its fixing effect on the stator winding, the stator slot 330 adopts a multi-layer structure design of waist-shaped sub-slots 331, trapezoidal sub-slots 332, and rectangular sub-slots 333, and a slot wedge 800 formed by the combination of a first slot wedge 810 and a second slot wedge 820 is disposed at the stator slot opening. Specifically, the waist-shaped sub-slot 331 of the stator slot 330 is located on 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 the end of the rectangular sub-slot 333 away from the trapezoidal sub-slot 332 is configured as the stator slot opening. The slot wedge 800 is composed of a first slot wedge 810 and a second slot wedge 820. The cross-sectional shape of the first slot wedge 810 matches the rectangular sub-slot 333, forming a rectangular structure, while the cross-sectional shape of the second slot wedge 820 matches the trapezoidal sub-slot 332, forming a trapezoidal structure. This allows the slot wedge 800 to be tightly embedded and stably engaged in the stator slot, thereby effectively preventing loosening or detachment caused by vibration, centrifugal force or electromagnetic force during motor operation.

[0050] Building upon this, to further enhance the matching degree and stability of the slot wedge 800, the end face of the first slot wedge 810 facing away from the second slot wedge 820 is designed as a curved surface 811. The curvature of this curved surface 811 smoothly matches the curvature of the inner ring of the stator core 300. This design helps the slot wedge 800 to form a good fit with the inner surface of the stator core 300 after installation, avoiding the problem of uneven air gap 600 caused by shape mismatch. During the operation of the permanent magnet synchronous motor, the uniformity of the air gap 600 directly affects the electromagnetic characteristics of the motor, such as the distribution of magnetic flux density in the air gap 600 and torque fluctuations. Therefore, by making the curved surface 811 of the first slot wedge 810 smoothly match the curvature of the inner ring 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 electromagnetic noise during motor operation.

[0051] Furthermore, the end face of the second slot wedge 820 facing away from the first slot wedge 810 is configured as an abutment 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 positional displacement of the stator winding caused by electromagnetic forces, avoid friction between the winding and the inner wall of the stator slot 330, thereby reducing the risk of insulation damage caused by friction and improving the service life and operational reliability of the motor.

[0052] In some implementations, combined with Figure 6 , Figure 7 as well as Figure 8 To protect the stator core 300 during the installation or removal of the rotor core 400 and to 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 a second state to adapt to different operating conditions. In the first state, the adjustment adapter 900 forms an outward protrusion on the curved surface 811 and extends into the air gap 600 to prevent collisions between the rotor core 400 and the stator core 300 during installation, thus avoiding damage to the inner surface of the stator core 300 due to assembly errors or careless operation, and maintaining the integrity of key motor components. Furthermore, in the second state, the outward protrusion on the curved surface 811 retracts inward and becomes flush with the curved surface 811, maintaining the spatial integrity of the air gap 600 after the rotor core 400 is installed into the stator core 300.

[0053] Based on this, once the rotor core 400 is installed and in normal operation, the adjusting adapter 900 can switch to its second state. In this state, the protruding portion on the curved surface 811 retracts inward and eventually becomes flush with the curved surface 811. The purpose of this structural design is to minimize the impact of the adjusting adapter 900 on the air gap 600 during motor operation. If the protruding portion of the adjusting adapter 900 remains within the air gap 600 during operation, it may interfere with the motor's magnetic field distribution. Specifically, after the protruding portion enters the air gap 600, it will increase the equivalent length of the air gap 600 to some extent, leading to increased magnetic reluctance, weakening the main magnetic flux, and causing a decrease in the motor's back electromotive force, affecting the overall power density and operating efficiency. Furthermore, the non-uniformity of the air gap 600 may cause distortion of the internal magnetic field of the motor, thereby increasing higher harmonic components and further exacerbating torque pulsation, potentially leading to increased motor noise and vibration, and affecting operational stability.

[0054] Furthermore, the retractable design of the adjusting adapter 900 helps optimize the motor's heat dissipation performance. Typically, the slot wedge 800 is made of insulating or magnetic materials with relatively low thermal conductivity. If its protruding portion enters the air gap 600, it may obstruct the flow of cooling air, affecting the effective dissipation of heat inside the motor, leading to increased winding temperature and reduced overload capacity and long-term reliability. Simultaneously, under the action of the high-speed rotating rotor core 400, strong airflow and centrifugal force are generated within the air gap 600 region. If the protruding portion of the slot wedge 800 is within the air gap 600, it may be subjected to additional aerodynamic impact, causing it to loosen or even detach, thus affecting the winding's stability and potentially even causing a short circuit or mechanical damage. Therefore, by retracting the protruding portion of the adjusting adapter 900 into the first slot wedge 810 during motor operation, the above problems can be effectively avoided, maintaining the stability of the air gap 600 region and improving the overall reliability and service life of the motor.

[0055] Furthermore, if the slot wedge 800 is made of magnetic material, its entry into the air gap 600 may significantly affect the magnetic field distribution within the air gap 600, potentially causing localized abnormal magnetic flux density. This could lead to additional eddy current losses and iron losses, reducing the low-loss characteristics of the stator core 300 and impacting the overall efficiency of the motor. Therefore, this embodiment utilizes adjustable adapters to meet the needs of different operating conditions before and after motor operation. This improves protection during assembly while optimizing the magnetic field distribution and heat dissipation during motor operation, thereby enhancing the motor's operational stability and long-term reliability.

[0056] In some implementations, combined with Figure 6 , Figure 7 as well as Figure 8 The adjustment adapter 900 includes a sliding bar 910 and a protrusion 920. The first groove wedge 810 has a sliding groove 812 along its own length direction. The sliding bar 910 is slidably inserted into the sliding groove 812. The first groove wedge 810 has a plurality of radial slots 813 spaced apart along its own length direction. The radial slots 813 are perpendicularly connected to the sliding groove 812. The protrusion 920 is slidably inserted into the radial slots 813. The outer surface of the protrusion 920 facing away from the sliding groove 812 is configured as an arc surface 921, and the arc surface 921 is adapted to the curvature of the curved surface 811.

[0057] Furthermore, when the adjusting adapter 900 is in the first state, part of the sliding bar 910 extends out of the sliding groove 812, while part of the protrusion 920 automatically extends out of the radial slot 813 under the action of the sliding bar 910 and is located in the air gap 600.

[0058] Furthermore, when the adjustment adapter 900 is in the second state, the sliding bar 910 is completely within the sliding groove 812, and the protrusion 920 automatically retracts into the radial slot 813 under the action of the sliding bar 910, and the arc surface 921 of the protrusion 920 is flush with the curved surface 811.

[0059] In some implementations, combined with Figure 6 , Figure 7 as well as Figure 8 The surface of the sliding bar 910 is provided with a plurality of hidden grooves 9110. One inner wall of the hidden groove 9110 is configured as a first inclined sliding surface 9111. The corner portion of the protrusion 920 near the sliding bar 910 is configured as a second inclined sliding surface 922. The first inclined sliding surface 9111 and the second inclined sliding surface 922 can slide relative to each other, and the opening width of the hidden groove 9110 is greater than the thickness of the protrusion 920.

[0060] An exemplary radial slot 813 has a radial limiting groove 814 on one side inner wall, and a radial limiting sub-part 923 on the side wall of the protrusion 920. The radial limiting sub-part 923 extends into the radial limiting groove 814, and a first spring 924 is connected between the radial limiting sub-part 923 and the radial limiting groove 814. The first spring 924 always has the tendency to pull the protrusion 920 radially into the radial slot 813.

[0061] For example, when the sliding bar 910 is completely within the sliding groove 812, the hidden groove 9110 and the protrusion 920 are radially opposite each other, so that the protrusion 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 protrusion 920 is flush with the curved surface 811. When the sliding bar 910 gradually moves out of the sliding groove 812, the protrusion 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 protrusion 920 moves to the surface of the sliding bar 910. At this time, the arc surface 921 of the protrusion 920 extends out of the radial slot 813 and is located in the air gap 600.

[0062] In some implementations, combined with Figure 6 , Figure 7 as well as Figure 8 The adjustment adapter 900 also includes an end face limiting part 930 and a second spring 940. A limiting groove 911 is provided on the side wall of the sliding bar 910 near its outer end wall. The end face limiting part 930 can be embedded in the limiting groove 911. The second spring 940 is axially connected between the inner end wall of the sliding bar 910 and the inner bottom wall of the sliding groove 812. The second spring 940 always has the tendency to axially pull the sliding bar 910 into the sliding groove 812.

[0063] For example, when the end face limiting part 930 is embedded in the limiting groove 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 bar 910 is limited to a state where the portion of the sliding bar 910 extends out of the sliding groove 812; furthermore, when the end face limiting part 930 is removed from the limiting groove 911, the sliding bar 910 is completely retracted into the sliding groove 812 under the pulling force of the second spring 940.

[0064] Based on this, during the motor assembly process, when the rotor core 400 is installed inside the stator core 300, the sliding bar 910 needs to be partially pulled out along the length of the sliding groove 812. At this time, the opening of the hidden groove 9110 and the protrusion 920 are aligned. The width of the opening of the hidden groove 9110 is greater than the thickness of the protrusion 920. Therefore, the protrusion 920 can slide relative to the first inclined sliding surface 9111 on one side of the hidden groove 9110 through its own second inclined sliding surface 922. This allows the protrusion 920 to come out of the hidden groove 9110 and move outward in the radial direction. At the same time, the radial limiting part 923 also stretches the first spring 924 as the protrusion 920 moves, causing a part of the protrusion 920 to enter the air gap 600, thereby forming multiple protruding structures on the inner peripheral wall of the entire stator core 300. These protrusions 920 effectively protect the rotor core 400 during installation, ensuring that if the rotor core 400 is bumped during assembly, only the protrusions 920 come into contact with it, preventing direct impact on the stator core 300 body and avoiding mechanical damage to the stator core 300 due to external forces. For example, the protrusions 920 are made of hard rubber, which reduces the impact force when the rotor core 400 collides with the protrusions 920, making the rotor core 400 less prone to damage.

[0065] Furthermore, after the sliding bar 910 is partially pulled out of the sliding groove 812, the limiting groove 911 at its outer end will also be exposed. At this time, the installer can insert the end face limiting part 930 into the limiting groove 911. Since the side wall of the end face limiting part 930 abuts against the end wall of the first groove wedge 810, the sliding bar 910 is prevented from retracting into the sliding groove 812 due to the pulling force of the second spring 940, so that the protrusion 920 is stably in the air gap 600 and maintains the first state.

[0066] Once the rotor core 400 is fully installed and in operation, the protrusion 920 no longer needs to extend into the air gap 600. Therefore, the adjustment adapter 900 needs to be switched to the second state, i.e., to remove its influence on the air gap 600. In this case, the installer first needs to remove the end face limiting part 930 from the limiting slot 911. After the end face limiting part 930 loses its limiting function, the sliding bar 910 retracts into 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 protrusion 920. During this process, the elastic force of the first spring 924 will cause the protrusion 920 to retract into the radial slot 813 and eventually embed into the hidden slot 9110, so that the arc surface 921 of the protrusion 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 motor operation.

[0067] In summary, during motor operation, the protrusion 920 of the adjusting adapter 900 does not extend into the air gap 600, thus avoiding any additional increase in the equivalent length of the air gap 600. This reduces magnetic reluctance, increases the motor's main magnetic flux capability, prevents a decrease in back electromotive force, and improves the motor's power density and operating efficiency. Secondly, this structure effectively prevents the protrusion of the slot wedge 800 from affecting the uniformity of the magnetic field in the air gap 600, thereby preventing an increase in higher harmonic components, reducing torque pulsation, and decreasing motor operating noise and vibration, resulting in smoother motor operation. Furthermore, since the protrusion 920 is completely retracted into the slot wedge 800 during operation, its presence in the air gap 600 region does not affect the flow of cooling air, thus optimizing the motor's heat dissipation performance, reducing winding temperature rise, and improving the motor's reliability and overload capacity. Meanwhile, this design avoids the strong airflow and centrifugal force generated by the high-speed rotating rotor core 400 within the air gap 600, which could cause additional impact on the slot wedge 800. This reduces the risk of the slot wedge 800 loosening or falling off, improves the stability of the winding, and lowers the risk of short circuits or damage caused by mechanical loosening. Finally, if the slot wedge 800 is made of magnetic material, its entry into the air gap 600 may affect the magnetic field distribution of the air gap 600, causing additional eddy current losses and iron losses, reducing the overall efficiency of the motor. However, this embodiment avoids the influence of magnetic materials on the motor's magnetic field by completely retracting the protrusion 920 during operation, enabling the motor to operate stably at a higher efficiency.

[0068] For example, to facilitate the removal of the end face limiting part 930 from the limiting slot 911, a groove is provided at the top of the end face limiting part 930, and a hook ring is hinged in the groove. The installer can use the hook to hook the hook ring and pull the end face limiting part 930 out of the limiting slot 911 to remove the end face limiting part 930 from the limiting 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 use the hook to hook the hook ring and pull the sliding strip 910 out of the sliding groove 812 to pull the sliding strip 910 out of the sliding groove 812.

[0069] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A non-crystalline alloy permanent magnet motor comprising a casing (100) and a rotating shaft (200), characterized in that, Further comprising a stator core (300), a rotor core (400) and a permanent magnet (500) arranged in the casing (100), the rotor core (400) is arranged in the inner ring of the stator core (300) and an air gap (600) is reserved between the two, the permanent magnet (500) is embedded in the inside of the rotor core (400), and the rotor core (400) is sleeved on the rotating shaft (200); The stator core (300) is formed by axially stacking a plurality of first silicon steel sheet core parts (310) and a plurality of first amorphous alloy core parts (320) in sequence, and the first silicon steel sheet core parts (310) and the first amorphous alloy core parts (320) are connected alternately; The rotor core (400) is formed by axially stacking a plurality of second silicon steel sheet core parts (410) and a plurality of second amorphous alloy core parts (420) in sequence, and the second silicon steel sheet core parts (410) and the second amorphous alloy core parts (420) are connected alternately; The rotor core (400) is radially embedded with an even number of permanent magnets (500), each group of permanent magnets (500) contains two magnetic pole parts (510), and the two magnetic pole parts (510) in each group of permanent magnets (500) are configured in a V shape to form a ring-shaped Halbach array; In each group of permanent magnets (500), along the length direction of the two magnetic pole parts (510) close to each other, a single magnetic pole part (510) includes 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; Further comprising an inner stator winding (700) and a slot wedge (800), a plurality of stator slot bodies (330) are axially arranged on the inner ring wall of the stator core (300), the inner stator winding (700) is embedded in the stator slot body (330), and the slot wedge (800) is connected to the opening end of the stator slot body (330) to limit the inner stator winding (700) inside the stator slot body (330); The stator slot body (330) includes a waist-shaped sub-slot (331), a trapezoidal sub-slot (332) and a rectangular sub-slot (333), which are sequentially connected from inside to outside along the radial direction of the stator core (300), and one end of the rectangular sub-slot (333) away from the trapezoidal sub-slot (332) is configured as a stator slot opening; The slot wedge (800) is connected by a first slot wedge (810) and a second slot wedge (820), the cross-sectional shape of the first slot wedge (810) is a rectangle matched with the shape of the rectangular sub-slot (333), and the cross-sectional shape of the second slot wedge (820) is a trapezoid matched with the shape of the trapezoidal sub-slot (332); The end face of the first slot wedge (810) away from the second slot wedge (820) is configured as a curved surface (811), and the curvature of the curved surface (811) is smoothly matched with the curvature of the inner ring of the stator core (300); The end face of the second slot wedge (820) away from the first slot wedge (810) is configured as an abutting face (821), and the abutting face (821) is used to abut against the inner stator winding (700); The first slot wedge (810) is internally provided with an adjusting adapter (900), and the adjusting adapter (900) has a first state and a second state which can be switched, wherein, When the adjusting adapter (900) is in the first state, the adjusting adapter (900) forms a protrusion outward on the curved surface (811) and extends into the air gap (600) to prevent the rotor iron core (400) from colliding with the stator iron core (300) during installation of the rotor iron core (400) inside the stator iron core (300); When the adjusting adapter (900) is in the second state, the protrusion outward on the curved surface (811) of the adjusting adapter (900) is retracted inward and flushes with the curved surface (811) to maintain the spatial integrity of the air gap (600) after the rotor iron core (400) is installed inside the stator iron core (300).

2. The non-crystalline alloy permanent magnet motor according to claim 1, characterized in that, In the even-numbered group of the permanent magnets (500), the number of groups of the permanent magnets (500) is configured as a, and the V-shaped included angle formed by the two pole portions (510) in each group of the permanent magnets (500) is configured as b, wherein, The relationship between a and b satisfies: b = 90° + 180° / a.

3. The non-crystalline alloy permanent magnet motor of claim 1, wherein, The first silicon steel sheet iron core part (310) is made of renewed silicon steel sheets which are disassembled and recycled from waste permanent magnet motors, and / or the second silicon steel sheet iron core part (410) is made of renewed silicon steel sheets which are disassembled and recycled from waste permanent magnet motors.

4. The non-crystalline alloy permanent magnet motor of claim 3, wherein, The total number of the first silicon steel sheet 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 iron core (300), both ends of the stator iron core (300) are configured as the first amorphous alloy iron core part (320).

5. The non-crystalline alloy permanent magnet electric machine of claim 1, wherein, The adjusting adapter (900) comprises a sliding strip (910) and a protruding portion (920), the first slot wedge (810) is provided with a sliding groove (812) along the length direction of the first slot wedge (810), the sliding strip (910) is slidingly inserted into the sliding groove (812), the first slot wedge (810) is provided with a plurality of radial grooves (813) along the length direction of the first slot wedge (810), the radial grooves (813) are vertically communicated with the sliding groove (812), and the protruding portion (920) is slidingly inserted into the radial grooves (813), wherein The outer surface of the protruding portion (920) away from the sliding groove (812) is configured as an arc surface (921), and the arc surface (921) is matched with the curvature of the curved surface (811); When the adjusting adapter (900) is in the first state, part of the sliding strip (910) protrudes out of the sliding groove (812), and part of the protruding portion (920) is automatically protruded out of the radial groove (813) and located in the air gap (600) under the action of the sliding strip (910); When the adjusting adapter (900) is in the second state, the sliding strip (910) is completely in the sliding groove (812), and the protrusion (920) is automatically retracted into the radial slot (813) under the action of the sliding strip (910), and the arc surface (921) of the protrusion (920) is flush with the curved surface (811).

6. The non-crystalline alloy permanent magnet electric machine of claim 5, wherein, The sliding strip (910) is provided with a plurality of hidden grooves (9110) on the surface, one side inner wall of the hidden groove (9110) is configured as a first inclined sliding surface (9111), and the corner part of the protrusion (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 relatively slidably matched, and the opening width of the hidden groove (9110) is greater than the thickness of the protrusion (920). One side inner wall of the radial slot (813) is provided with a radial limiting groove (814), a radial limiting sub-part (923) is arranged on the side wall of the protrusion (920), the radial limiting sub-part (923) extends into the radial limiting groove (814), and a first spring (924) is connected between the radial limiting sub-part (923) and the radial limiting groove (814). The first spring (924) always has a tendency to radially pull the protrusion (920) into the radial slot (813). When the sliding strip (910) is completely in the sliding groove (812), the hidden groove (9110) is radially opposite to the protrusion (920), so that the protrusion (920) is partially embedded in the hidden groove (9110) under the action of the first spring (924), and at this time, the arc surface (921) of the protrusion (920) is flush with the curved surface (811). When the sliding strip (910) gradually moves out of the sliding groove (812), the protrusion (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 protrusion (920) moves to the surface of the sliding strip (910), and at this time, the arc surface (921) of the protrusion (920) extends out of the radial slot (813) and is located in the air gap (600).

7. The non-crystalline alloy permanent magnet electric motor of claim 6, wherein, The adjusting adapter (900) further comprises an end face limiting part (930) and a second spring (940). A limiting clamping groove (911) is arranged on the side wall of the sliding strip (910) close to the outer end wall thereof, the end face limiting part (930) can be embedded in the limiting clamping groove (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), and the second spring (940) always has a tendency to axially pull the sliding strip (910) into the sliding groove (812). In the case that the end face limiting part (930) is embedded in the limiting clamping groove (911), the side wall of the end face limiting part (930) is stopped by the end wall of the first slot wedge (810), so that the sliding strip (910) is limited in the state that part of the sliding strip (910) protrudes out of the sliding groove (812); In the case that the end face limiting part (930) is taken out of the limiting clamping groove (911), the sliding strip (910) is completely accommodated in the sliding groove (812) under the pulling force of the second spring (940).

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