A non-magnetic bridge type synchronous reluctance motor rotor based on a tenon structure

Abstract

The application discloses a non-magnetic bridge type synchronous reluctance motor rotor based on a tenon structure, which comprises a female magnetic guide core and P magnetic pole blocks; wherein P is the number of rotor magnetic poles. The female magnetic guide core is uniformly provided with P magnetic pole slots in the circumferential direction, and one magnetic pole block is arranged in each magnetic pole slot. Each magnetic pole block comprises N magnetic isolation material blocks and N sub magnetic guide cores which are staggered and arranged in sequence from inside to outside; wherein both ends of each magnetic isolation material block are extended to the outer diameter of the rotor. The two sides of each magnetic isolation material block are respectively connected with adjacent female magnetic guide cores or sub magnetic guide cores through a tenon structure; wherein the tenon heads of the tenon structure are arranged on the female magnetic guide core or the sub magnetic guide core. The application removes the magnetic bridge, weakens the magnetic circuit leakage, and maximizes the d-axis magnetic circuit permeance without affecting the overall structural strength. Due to the non-magnetic bridge, the salient pole ratio, output torque and power factor of the motor are improved.

Description

Technical Field

[0001] This invention relates to the field of synchronous reluctance motor technology, and in particular to a non-magnetic bridge synchronous reluctance motor rotor based on a tenon structure. Background Technology

[0002] As the core power source of modern industrial society, the performance of electric motors directly affects the production efficiency and energy consumption of the entire industrial system. Under the backdrop of the "dual-carbon" strategy, high energy conversion efficiency and low energy conversion loss have become important evaluation standards for measuring motor performance. According to statistics from the National Energy Administration, electric motors account for more than 60% of the country's total electricity consumption; therefore, improving motor energy efficiency is of great significance to achieving energy conservation and emission reduction goals.

[0003] Synchronous reluctance motors, as a new type of high-efficiency motor, work by using a slotted rotor design to block the quadrature-axis magnetic circuit, creating a significant difference in magnetic reluctance between the quadrature and direct-axis magnetic circuits. This difference in reluctance is then used to generate a magnetic pull on the salient-polarity rotor, forming electromagnetic torque. Synchronous reluctance motors have two significant advantages: firstly, they do not use rare-earth permanent magnet materials, avoiding dependence on rare-earth resources and the risk of price fluctuations; secondly, the rotor has no winding closed loop, fundamentally eliminating rotor copper losses. These characteristics allow synchronous reluctance motors to easily achieve energy conversion efficiencies of IE4 and above, while their manufacturing costs are close to those of traditional induction motors, gradually making them a mainstream solution for high-efficiency motors in industrial fields.

[0004] However, existing synchronous reluctance motors generally employ methods such as... to meet the requirements of rotor mechanical strength and stress. Figure 4 The magnetic bridge structure shown is designed to maintain the integrity of the rotor. While this design ensures mechanical strength and stress resistance, the presence of the magnetic bridge also introduces a serious problem of magnetic leakage in the magnetic circuit. The blocking effect of the rotor's quadrature-axis magnetic circuit is weakened, and the anisotropy of the quadrature and direct axes is reduced, thereby weakening the torque output capability of the synchronous reluctance motor and affecting the energy conversion efficiency.

[0005] Current industry solutions primarily focus on optimizing the shape design of the magnetic barrier tail section of synchronous reluctance motors, such as using arc-shaped or rectangular structures to improve the local magnetic field distribution of the magnetic bridge under operating conditions. However, these methods fail to address the root cause of magnetic leakage, resulting in very limited performance improvements. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a magnetic bridge-less synchronous reluctance motor rotor based on a tenon structure. This magnetic bridge-less synchronous reluctance motor rotor based on a tenon structure eliminates the magnetic bridge, reduces magnetic leakage in the magnetic circuit, and maximizes the magnetic permeability of the d-axis magnetic circuit without affecting the overall structural strength.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A rotor for a non-magnetic bridge synchronous reluctance motor based on a tenon structure is characterized by comprising a female magnetic core and P magnetic pole blocks, wherein P is the number of rotor magnetic poles.

[0008] The core of the mother magnet is uniformly provided with P magnetic pole slots along the circumference, and each magnetic pole slot contains one magnetic pole block.

[0009] Each magnetic pole block includes N magnetic shielding material blocks and N sub-magnetic cores arranged alternately from the inside to the outside; wherein, both ends of each magnetic shielding material block extend to the outer diameter of the rotor.

[0010] Each magnetic shielding material block is joined to the adjacent female magnetic core or female magnetic core on both sides by a tenon joint.

[0011] When all tenon joints have the same depth, the position of the tenon head is determined by the radial thickness of the magnetic shielding material block at the location of the tenon joint. d To be determined.

[0012] When the depths of the tenon structure are not equal, the tenons of the tenon structure are all set on the female magnetic core or the male magnetic core.

[0013] When the depths of the tenons are unequal, the depth of each tenon shall not exceed 1 / 4. d .

[0014] When the depth of all tenon joints is equal and is d 0. When the tenon of the tenon structure is set on the female magnetic core or the female magnetic core, d 0≤1 / 4 d .

[0015] When the depth of all tenon joints is equal and is d 0. When the tenon of the tenon structure is set on the magnetic shielding material block, then d 0≤1 / 4 D ;in, D The radial thickness of the female or female magnetic core at the location of the tenon structure.

[0016] When all tenon structures have the same depth, the result is first obtained through simulation optimization. d 0, then d 0 and 1 / 4 of its position d If we compare them, then: A. When d 0≤1 / 4 d In this case, the tenon of the tenon structure at this position is set on the female magnetic core or the female magnetic core.

[0017] B, when d 0 > 1 / 4 d At that time,d 0 and 1 / 4 D If a comparison is made, d 0≤1 / 4 D If so, place the tenon of the tenon structure at this location on the adjacent female magnetic core or female magnetic core; otherwise, return to re-simulate and optimize the magnetic shielding material block and the female magnetic core.

[0018] The central axis of each tenon structure coincides with the vertical line of the curve where the female or female magnetic core is located.

[0019] The tenon structures on both sides of each magnetic shielding material block are arranged opposite to each other or staggered.

[0020] A. When the tenon structures on both sides of the magnetic shielding material block are arranged opposite each other, let the thickness of the magnetic shielding material block at the location of any pair of opposite tenon structures A be . d 1. Therefore, the minimum distance between the two tenon structures A is not less than 1 / 2. d 1.

[0021] B. When the tenon structures on both sides of the magnetic shielding material block are staggered, let the thickness of the magnetic shielding material block at the center position of any two staggered tenon structures B be . d 2. Therefore, the minimum straight-line distance between the two tenon structures B is not less than 1 / 2. d 2.

[0022] Each tenon joint is a dovetail tenon, and the corners of the dovetail tenons are all rounded.

[0023] The depth, opening width, shoulder angle, and diameter of the rounded chamfer of each dovetail tenon were obtained through electromagnetic-mechanical co-simulation. In the electromagnetic simulation, the optimization objective was to maximize efficiency and output torque; in the mechanical simulation, the optimization objective was to minimize local stress peaks.

[0024] Each magnetic shielding material block is made of glass fiber reinforced POM copolymerized formaldehyde resin or epoxy resin.

[0025] Each magnetic shielding material block is formed by injection molding.

[0026] Each block of magnetic shielding material has a streamlined shape.

[0027] The present invention has the following beneficial effects: Compared with existing technologies, the present invention has the following features and advantages: 1. This invention eliminates the magnetic bridge structure of the synchronous reluctance motor, effectively reducing magnetic leakage. Due to the absence of the magnetic bridge, the salient pole ratio, output torque, and power factor of the motor are improved, which is of great significance for improving the performance of the synchronous reluctance motor and expanding its application fields.

[0028] 2. The high-strength engineering plastics such as glass fiber reinforced POM resin or high-strength composite materials such as epoxy resin proposed in this invention achieve the mechanical structural integrity of the synchronous reluctance motor rotor through a dovetail tenon structure. The technical solution conceived in this invention is suitable for small motors operating at medium and low speeds, and can effectively improve the output torque of the synchronous reluctance motor while ensuring the safe and stable operation of the synchronous reluctance motor rotor.

[0029] 3. This invention places the tenon on the magnetic core, minimizing the impact of the tenon structure on the d-axis magnetic circuit; the symmetry of the tenon structure about the magnetic pole axis maintains the symmetry of the three-phase induced back EMF during motor operation; 1 / 2 d The minimum distance ensures that the magnetic shielding material block fully isolates the q-axis magnetic circuit; when the thickness of the magnetic shielding layer is small, it does not meet the 1 / 2 requirement. d At the minimum distance, a magnetic layer thickness of more than 4 times the depth can ensure that the d-axis magnetic circuit is less affected by the tenon structure. Attached Figure Description

[0030] Figure 1 The diagram shows the structure of the non-magnetic bridge synchronous reluctance motor based on the tenon structure of the present invention.

[0031] Figure 2 This diagram shows a quarter-enlarged schematic of the rotor of the non-magnetic bridge synchronous reluctance motor based on the tenon structure of the present invention.

[0032] Figure 3 The diagram shows the shapes of the magnetic shielding material block and the sub-magnetic core in this invention; wherein, (a) is U-shaped; (b) is arc-shaped; (c) is polynomial curve-shaped; and (d) is streamline-shaped.

[0033] Figure 4 A schematic diagram of a synchronous reluctance motor with a magnetic bridge in the prior art is shown.

[0034] Figure 5 A schematic diagram showing the dimensions of the tenon structure in this invention is displayed.

[0035] Figure 6 This diagram shows the structural results of the optimized dovetail groove depth, dovetail groove opening width, dovetail groove shoulder angle, and dovetail groove fillet diameter in this invention.

[0036] Figure 7 The simulation model and simulation results of the synchronous reluctance motor with magnetic bridge are shown; (a) is the topology of the model with magnetic bridge; (b) is the magnetic density cloud map.

[0037] Figure 8 The simulation model and simulation results of the non-magnetic bridge synchronous reluctance motor in this invention are shown; where (a) is the topology of the non-magnetic bridge dovetail model; and (b) is the magnetic density cloud diagram.

[0038] Figure 9 The simulation model and simulation results of the non-magnetic bridge synchronous reluctance motor in this invention are shown; (a) is the topology of the non-magnetic bridge model with the same tenon structure size; (b) is the magnetic density cloud map.

[0039] Figure 10 The simulation model and simulation results of the non-magnetic bridge synchronous reluctance motor in this invention are shown; (a) is the topology of the non-magnetic bridge model with different sizes of tenon structure; (b) is the magnetic density cloud map. Figure 11 The diagram shows that all tenon structures in this invention are outward-convex tenon structures.

[0040] Among them are: 10. Non-magnetic bridge synchronous reluctance motor rotor; 11. Female magnetic core; 12. Magnetic shielding material block; 121. First magnetic shielding material block; 122. Second magnetic shielding material block; 123. Third magnetic shielding material block; 13. Sub-magnetic core; 131. First sub-magnetic core; 132. Second sub-magnetic core; 133. Third sub-magnetic core; 14. Tenon structure; 141. Magnetic tenon; 142. Magnetic-insulating tenon groove; 15. Concave tenon structure; 151. Magnetic-insulating tenon; 152. Magnetic-conducting tenon groove; 20. Stator core; 30. Windings; 40. Rotor core of a magnetic bridge synchronous reluctance motor; 41. Magnetic barrier; 42. Magnetic bridge. Detailed Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings and specific preferred embodiments.

[0042] In the description of this invention, it should be understood that the terms "left side," "right side," "upper part," "lower part," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. "First," "second," etc., do not indicate the importance of the components, and therefore should not be construed as a limitation of this invention. The specific dimensions used in this embodiment are only for illustrating the technical solution and do not limit the scope of protection of this invention.

[0043] like Figure 1 As shown, a non-magnetic bridge synchronous reluctance motor based on a tenon structure includes a non-magnetic bridge synchronous reluctance motor rotor 10, a stator 20, and windings 30 disposed in the stator.

[0044] A non-magnetic bridge synchronous reluctance motor rotor based on a tenon structure, namely a non-magnetic bridge synchronous reluctance motor rotor 10, is described in detail with reference to the following preferred embodiments.

[0045] Example 1: The depth of the tenon structure is equal. like Figure 1 and Figure 2 As shown, a rotor of a non-magnetic bridge synchronous reluctance motor based on a tenon structure includes a female magnetic core 11 and P magnetic pole blocks; where P is the number of rotor magnetic poles. In this embodiment, a detailed description is given with P=4 as an example, in which case there are 4 magnetic pole blocks.

[0046] The main magnetic core is preferably provided with P=4 magnetic pole slots evenly distributed along the circumference, and a magnetic pole block is arranged in each magnetic pole slot. A rotating shaft hole is provided in the center of the main magnetic core.

[0047] Each magnetic pole block includes N magnetic shielding material blocks 12 and N sub-magnetic cores 13 arranged alternately from the inside to the outside; in this embodiment, N=3 is preferred; wherein, the three magnetic shielding materials are the first magnetic shielding material block 121, the second magnetic shielding material block 122 and the third magnetic shielding material block 123 from the outside to the inside (that is, from small to large).

[0048] The three sub-magnetic cores, from the outside to the inside (i.e., from smallest to largest), are the first sub-magnetic core 131, the second sub-magnetic core 132, and the third sub-magnetic core 133. In this embodiment, the material of the main magnetic core and the sub-magnetic cores is preferably 50WW800 cold-rolled non-oriented electrical steel from Wuhan Iron and Steel Group, a commonly used grade in conventional industrial motors. The thickness is preferably 0.5mm, the standard iron loss is preferably 8W / kg, the yield strength is preferably 542MPa, and the Young's modulus is preferably 2e11Pa.

[0049] Both ends of the aforementioned magnetic shielding material block extend to the outer diameter of the rotor, thus forming a non-magnetic bridge structure.

[0050] The shape of each of the aforementioned magnetic shielding material blocks and each sub-magnetic core can be as follows: Figure 3 The shapes shown include quadratic curves, circular arcs, U-shapes, and streamlined shapes. Among them, the U-shape is easy to process; the circular arc shape is derived from the exploration of the dq-axis magnetic circuit and can increase curve parameters (design variables); the quadratic curve shape is obtained by optimizing the processing advantages of the U-shape; the streamlined shape used in this invention is a further evolution of the quadratic curve and circular arc shapes, which optimizes the magnetic field line distribution of the d-axis magnetic circuit while ensuring processing advantages, thereby blocking the q-axis magnetic circuit and maximizing the magnetic flux of the d-axis magnetic circuit.

[0051] Furthermore, the material of each magnetic shielding block is preferably glass fiber reinforced POM copolymerized formaldehyde resin or epoxy resin, etc.

[0052] In this embodiment, POM GF20 glass fiber reinforced copolymer polyoxymethylene resin from China Yuntianhua is preferably used. The preferred material density is 1570 kg / m³, the preferred yield strength is 110 MPa, the preferred Young's modulus is 7e9 Pa, and the preferred flexural modulus is 6.5e9 Pa. To ensure adequate matching and uniform stress at the joints, after the positions of the female magnetic core and each of the female magnetic cores are fixed, the magnetic shielding material block is preferably processed and formed uniformly by injection molding, with a preferred coefficient of friction of 0.2.

[0053] Each magnetic shielding material block is connected to the adjacent female magnetic core or female magnetic core on both sides by a tenon structure; wherein, the tenon of the tenon structure is set on the female magnetic core or female magnetic core, also known as magnetic tenon 141, and the tenon groove of the tenon structure is preferably set on the magnetic shielding material block, also known as magnetic shielding tenon groove.

[0054] Regarding electromagnetic performance, this invention employs a convex magnetic dovetail because the convexity has less impact on the d-axis magnetic circuit, while the concaveness would block the d-axis magnetic circuit. However, the depth of the convexity cannot be too great, as it can easily create a magnetic leakage circuit with the dovetail on the opposite side.

[0055] Furthermore, the central axis of each tenon structure coincides with the perpendicular line from the curve where the female or female magnetic core is located. A perpendicular line is drawn from the main curve of the magnetic shielding material block, and the distance offset to both sides is equal to the width of the dovetail groove. This line intersects with the main curve of the magnetic shielding material block to form the dovetail groove opening. The dovetail groove tenon is then drawn along the perpendicular line, completing a single tenon structure.

[0056] Adjust the spatial arrangement of the tenon structure to optimize stress distribution.

[0057] The tenon structures on both sides of each magnetic shielding material block are arranged oppositely or staggered. Except for the tenon structures arranged on the magnetic pole axis, the other tenon structures are arranged symmetrically in pairs about the magnetic pole axis, where the magnetic pole axis is the geometric center line of the magnetic pole groove.

[0058] The central axis of each tenon structure coincides with the vertical line of the curve where the female or female magnetic core is located.

[0059] like Figure 5 As shown, the depth of all tenon structures is equal and is d 0. The tenon position of the tenon structure is determined by the radial thickness of the magnetic shielding material block at the location of the tenon structure. d To be determined.

[0060] The design of having all tenons of equal depth facilitates manufacturing and processing.

[0061] The preferred method for setting the tenon position in a mortise and tenon structure is to first obtain the position through simulation optimization. d 0, then d 0 and 1 / 4 of its positiond If we compare them, then: A. When d 0≤1 / 4 d In this case, the tenon of the tenon structure at this position is set on the female magnetic core or the female magnetic core.

[0062] B, when d 0 > 1 / 4 d At that time, d 0 and 1 / 4 D If a comparison is made, d 0≤1 / 4 D If so, the tenon of the tenon structure at this location is placed on the adjacent female or female magnetic core; otherwise, return to re-simulate and optimize the magnetic shielding material block and the female magnetic core. D The radial thickness of the female or female magnetic core at the location of the tenon structure.

[0063] In this embodiment, the tenon structure on each magnetic shielding material block is of the same type, which is either an outwardly convex tenon structure or an inwardly concave tenon structure. The specific arrangement is as follows: A. The tenon structures on both sides of the second magnetic shielding material block 122 and the third magnetic shielding material block 123 are arranged opposite each other, and the tenon structures on both sides of the second magnetic shielding material block 122 or the third magnetic shielding material block 123 are all convex tenon structures. Each convex tenon structure includes a magnetic dove 141 and a magnetic shielding tenon groove 142.

[0064] At this point, let the thickness of the magnetic shielding material block at the location of any pair of opposite tenon structures A be . d 1. Therefore, the minimum distance between the two tenon structures A is not less than 1 / 2. d 1.

[0065] B. The tenon structures on both sides of the first magnetic shielding material block 121 are arranged in an alternating manner, and each tenon structure is a concave tenon structure 15. Each concave tenon structure includes a magnetic shielding tenon 151 and a magnetic guiding tenon groove 152.

[0066] At this point, let the thickness of the magnetic shielding material block at the center position of any pair of intersecting tenon structures B be... d 2. Therefore, the minimum straight-line distance between the two tenon structures B is not less than 1 / 2. d 2.

[0067] Alternatively, the type of tenon structure on each magnetic shielding material block can also be different.

[0068] Furthermore, each tenon structure is preferably a dovetail tenon, and the corners of the dovetail tenons are preferably rounded chamfers.

[0069] Furthermore, the preferred spatial distribution of the tenon structure along the contact surface between the magnetic core and the magnetic shielding material block is: along the pure... dThe position of the axial magnetic field magnetomotive force line descending at an arithmetic gradient is determined by the number of tenon structures.

[0070] The structure of a reference synchronous reluctance motor with a magnetic bridge, such as... Figure 4 As shown, magnetic bridges 42 are provided at both ends of the magnetic barrier 41. Because the magnetic circuits of synchronous reluctance motors with and without magnetic bridges are different, their optimal magnetic shielding layer allocation schemes are not the same. That is, the optimal magnetic core / magnetic shielding material block thickness allocation of a synchronous reluctance motor with a magnetic bridge cannot achieve the best effect when applied to a synchronous reluctance motor without a magnetic bridge. Therefore, the depth, opening width, shoulder angle, and diameter of the rounded chamfer of each dovetail tenon in this invention are obtained through electromagnetic-mechanical joint simulation; wherein, in the electromagnetic simulation, the optimization objective is to maximize efficiency and output torque; and in the mechanical simulation, the optimization objective is to minimize local stress.

[0071] To fully demonstrate the effectiveness of the present invention, the structural design parameters were optimized with the goal of maximizing efficiency and maximizing output torque. Differential evolution algorithm was used to optimize the parameters for each of the populations with a size of 80 individuals and a number of iterations of 50 generations.

[0072] In this invention, the structural design of the non-magnetic bridge synchronous reluctance motor specifically includes the following three rounds of optimization.

[0073] First round of optimization The optimized parameters are: the thickness of each layer of magnetic shielding material block. The optimization objectives are: to maximize efficiency and to maximize output torque. The optimized population is: 80 individuals for 50 generations (the number of individuals should be no less than twice the number of parameters × the target number). The optimization result is as follows: Results of the first round of optimization

[0074] Second round of optimization The optimized parameters are: dovetail groove depth, dovetail groove opening width, dovetail groove shoulder angle, and dovetail groove fillet diameter. The electromagnetic optimization objectives are: to maximize efficiency and to maximize output torque. The optimized population is: 80 individuals for 50 generations (the number of individuals should be no less than twice the number of parameters × the target number). Third round of optimization The optimized parameters are: dovetail groove depth, dovetail groove opening width, dovetail groove shoulder angle, and dovetail groove fillet diameter. Mechanical optimization objective: To minimize local stress peaks. Mechanical topology stress simulation, stress check passed, results after second and third rounds of optimization are as follows:

[0075] The above data, specifically as follows: Figure 6 As shown.

[0076] Simulation model of synchronous reluctance motor with magnetic bridge, such as Figure 7 As shown.

[0077] The optimized model of the non-magnetic bridge synchronous reluctance motor of this invention is as follows: Figure 8 and 9 As shown.

[0078] The optimized operating conditions of the non-magnetic bridge synchronous reluctance motor and the magnetic bridge synchronous reluctance motor of this invention are: line current 3.5A, speed 3000rpm. The simulation results are shown in Table 4.

[0079] Table 4

[0080] The comparison shows that the non-magnetic bridge synchronous reluctance motor of the present invention effectively reduces magnetic leakage in the magnetic circuit, lowers the q-axis inductance, and increases the salient pole ratio by 26.88%. This method, due to the increased air gap between the stator and rotor caused by the magnetic barrier penetration, also weakens the main magnetic field to some extent, resulting in a slight reduction in the d-axis inductance. Overall, the non-magnetic bridge synchronous reluctance motor shows an 8% performance improvement and a 1.3% efficiency improvement compared to the reference magnetic bridge synchronous reluctance motor. This embodiment demonstrates that the non-magnetic bridge synchronous reluctance motor of the present invention has a good effect on improving the motor's magnetic circuit, increasing the motor's output torque, and improving energy conversion efficiency. Furthermore, it is noted that the increase in the salient pole ratio improves the motor's power factor, effectively suppressing the rise in line voltage, reducing the motor's demand on controller capacity, and further reducing the production and operating costs of the entire system.

[0081] Example 2: The depth of the tenon structure is not uniform. Example 2 is basically the same as Example 1, except that in Example 1, the depth of the tenon structure was optimized first, and then the type of tenon structure was determined; in Example 2, all tenon structures are first set as convex tenon structures (that is, the tenons of the tenon structures are all set on the female magnetic core or the female magnetic core), such as Figure 11 As shown; then optimize the depth of each tenon structure. The depth of the tenons can be equal or unequal, but the depth of each tenon structure should not exceed 1 / 4. d .

[0082] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and these equivalent transformations all fall within the protection scope of the present invention.

Claims

1. A rotor for a non-magnetic bridge synchronous reluctance motor based on a tenon structure, characterized in that: It includes a mother magnetic core and P magnetic pole blocks; where P is the number of rotor magnetic poles; The mother magnetic core is uniformly provided with P magnetic pole slots along the circumference, and one magnetic pole block is arranged in each magnetic pole slot; Each magnetic pole block comprises N magnetic shielding material blocks and N sub-magnetic cores arranged alternately from the inside to the outside; wherein, both ends of each magnetic shielding material block extend to the outer diameter of the rotor; Each magnetic shielding material block is joined to the adjacent female magnetic core or female magnetic core on both sides by a tenon structure. When all tenon joints have the same depth, the position of the tenon head is determined by the radial thickness of the magnetic shielding material block at the location of the tenon joint. d To confirm; When the depths of the tenon structure are not equal, the tenons of the tenon structure are all set on the female magnetic core or the male magnetic core. When the depths of the tenons are unequal, the depth of each tenon shall not exceed 1 / 4. d ; When the depth of all tenon joints is equal and is d 0. When the tenon of the tenon structure is set on the female magnetic core or the female magnetic core, d 0≤1 / 4 d ; When the depth of all tenon joints is equal and is d 0. When the tenon of the tenon structure is set on the magnetic shielding material block, then d 0≤1 / 4 D ;in, D The radial thickness of the female or female magnetic core at the location of the tenon structure; When all tenon structures have the same depth, the result is first obtained through simulation optimization. d 0, then d 0 and 1 / 4 of its position d If we compare them, then: A. When d 0≤1 / 4 d In this case, the tenon of the tenon structure at this position is set on the female magnetic core or the female magnetic core; B, when d 0 > 1 / 4 d At that time, d 0 and 1 / 4 D If a comparison is made, d 0≤1 / 4 D If so, place the tenon of the tenon structure at this location on the adjacent female magnetic core or female magnetic core; otherwise, return to re-simulate and optimize the magnetic shielding material block and the female magnetic core.

2. The rotor of the non-magnetic bridge synchronous reluctance motor based on a tenon structure according to claim 1, characterized in that: The central axis of each tenon structure coincides with the vertical line of the curve where the female or female magnetic core is located.

3. The rotor of the non-magnetic bridge synchronous reluctance motor based on a tenon structure according to claim 1, characterized in that: The tenon structures on both sides of each magnetic shielding material block are arranged opposite to each other or staggered. A. When the tenon structures on both sides of the magnetic shielding material block are arranged opposite each other, let the thickness of the magnetic shielding material block at the location of any pair of opposite tenon structures A be . d 1. Therefore, the minimum distance between the two tenon structures A is not less than 1 / 2. d 1; B. When the tenon structures on both sides of the magnetic shielding material block are staggered, let the thickness of the magnetic shielding material block at the center position of any two staggered tenon structures B be . d 2. Therefore, the minimum straight-line distance between the two tenon structures B is not less than 1 / 2. d 2.

4. The rotor of the non-magnetic bridge synchronous reluctance motor based on a tenon structure according to claim 1, characterized in that: Each tenon joint is a dovetail tenon, and the corners of the dovetail tenons are all rounded.

5. The rotor of the non-magnetic bridge synchronous reluctance motor based on a tenon structure according to claim 4, characterized in that: The depth, opening width, shoulder angle, and diameter of the rounded chamfer of each dovetail tenon were obtained through electromagnetic-mechanical co-simulation. In the electromagnetic simulation, the optimization objective was to maximize efficiency and output torque; in the mechanical simulation, the optimization objective was to minimize local stress peaks.

6. The rotor of the non-magnetic bridge synchronous reluctance motor based on a tenon structure according to claim 1, characterized in that: Each magnetic shielding material block is made of glass fiber reinforced POM copolymerized formaldehyde resin or epoxy resin.

7. The rotor of a non-magnetic bridge synchronous reluctance motor based on a tenon structure according to claim 1 or 6, characterized in that: Each magnetic shielding material block is formed by injection molding.

8. The rotor of the non-magnetic bridge synchronous reluctance motor based on a tenon structure according to claim 1, characterized in that: Each block of magnetic shielding material has a streamlined shape.

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