Rotor structure and reluctance motor using the same

Abstract

The utility model discloses a rotor structure and reluctance motor using it, include: non -magnetic fixed -ware and with non -magnetic fixed -ware's center even arrangement's mutual not connect and present polar discrete formula's multiple sector core block, each sector core block all be suitable for with non -magnetic fixed -ware's circumferential outside wall links to each other, wherein each sector core block all be provided with air gap magnetic barrier structure, and air gap magnetic barrier structure includes at least one layer air gap magnetic barrier groove that penetrates the axial both ends of sector core block, and every layer air gap magnetic barrier groove extends along the circumferential of sector core block. Reluctance motor of the rotor structure of adopting the utility model has higher salient pole ratio, higher torque value relative to traditional whole piece rotor structure synchronous reluctance motor.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a rotor structure and a reluctance motor using the same. Background Technology

[0002] Synchronous reluctance motors follow the principle of the least reluctance path, driving the motor's rotation by generating magnetic reluctance (i.e., reluctance torque) through changes in magnetic reluctance caused by the rotor's position. Specifically, when current flows through the stator windings, the magnetic flux generated in the windings flows from one end of the stator through the air gap and the rotor, closing at the other end of the stator. Because the rotor has a salient pole structure, the magnetic reluctance on the magnetic circuit changes with the rotor's position. When the axis of the stator magnetic field coincides with the center line of the rotor's salient pole, the magnetic reluctance is at its minimum, and no reluctance torque is generated. However, when the rotor deflects slightly, an angle exists between the center line of the rotor's salient pole and the axis of the stator magnetic field, causing the magnetic field to twist and generating magnetic reluctance to drive the rotor's rotation, thus minimizing the magnetic reluctance. Compared to permanent magnet synchronous motors, synchronous reluctance motors have advantages such as lower cost, simpler manufacturing, and higher cost-effectiveness because there are no permanent magnets in the rotor structure. The electromagnetic torque of a synchronous reluctance motor consists solely of reluctance torque; it is a type of motor that utilizes the difference between the direct-axis and quadrature-axis inductances of the motor to generate reluctance torque.

[0003] Traditional synchronous reluctance motor rotors are made by axially stacking a single piece of silicon steel sheet. To increase the difference in inductance between the direct and quadrature axes, a design is used to increase magnetic barriers in the stacked silicon steel sheets. However, conventional synchronous reluctance motors suffer from low saliency and limited torque performance. For example, CN116846107A discloses a rotor-laminated, segmented permanent magnet assisted synchronous reluctance motor, which includes a stator and a rotor. The rotor consists of a rotor shaft and a rotor core. A bushing is inserted into the rotor shaft, and the rotor core is inserted into the bushing. The rotor core comprises several stacked rotor laminations. Regarding the disclosed segmented, bridge-free rotor lamination structure, the segmented design significantly improves the utilization rate of raw materials, and the absence of a magnetic bridge reduces permanent magnet magnetic field losses, thus improving system efficiency. However, the rotor core formed by the segmented design in the above technology is still an integral structure arranged continuously along the circumference. Under this structure, it is necessary to increase efficiency by adding permanent magnets and improving the magnetic circuit of permanent magnets. This makes the actual production and installation process of this segmented non-magnetic bridge structure more complicated, and the air gap non-uniformity caused by the non-magnetic bridge is significantly increased, which will produce a large torque pulsation.

[0004] In summary, given the existing defects in the rotor of the synchronous reluctance motor, further optimization of its overall structure is necessary. Utility Model Content

[0005] The primary objective of this invention is to provide a rotor structure to address the technical problem of optimizing its overall structure.

[0006] The second objective of this invention is to provide a reluctance motor to solve the technical problem of increasing the salient pole ratio of the motor, thereby increasing the motor torque value.

[0007] The rotor structure of this utility model is implemented as follows: A rotor structure includes: a non-magnetic fastener, and a plurality of unconnected and discrete sector-shaped iron core blocks uniformly arranged around the center of the non-magnetic fastener. Each of the aforementioned sector-shaped iron core blocks is adapted to be connected to the circumferential outer wall of a non-magnetic fastener; wherein Each of the aforementioned sector-shaped iron core blocks is provided with an air gap magnetic barrier structure; and The air gap magnetic barrier structure includes at least one layer of air gap magnetic barrier grooves that penetrate both ends of the fan-shaped iron core block, and each layer of air gap magnetic barrier grooves extends circumferentially along the fan-shaped iron core block.

[0008] In optional embodiments of this utility model, each of the sector-shaped iron core blocks is adapted to be inserted into the circumferential outer wall of the non-magnetic fastener; each of the sector-shaped iron core blocks and the non-magnetic fastener is designed with a mortise and tenon structure suitable for insertion.

[0009] In an optional embodiment of this utility model, the mortise and tenon structure includes at least one pair of matching tenons and mortises; wherein The tenon is provided on the wall surface of the sector-shaped iron core block facing the non-magnetic fastener, and the mortise is provided on the wall surface of the non-magnetic fastener facing the sector-shaped iron core block; or The mortise is provided on the wall surface of the fan-shaped iron core block facing the non-magnetic fastener, and the tenon is provided on the wall surface of the non-magnetic fastener facing the fan-shaped iron core block.

[0010] In an optional embodiment of this invention, the non-magnetic fastener includes a main body and a plurality of extensions spaced apart and evenly distributed on the circumferential side of the main body; each of the extensions extends radially along the rotor structure; wherein The main body has a shaft hole that extends axially along the rotor structure.

[0011] In an optional embodiment of this invention, the number of extensions is the same as the number of sector-shaped iron core blocks; and Each of the extensions is adapted to mate with two sector-shaped iron core blocks simultaneously, and the sidewalls of the main body and each extension facing the sector-shaped iron core block are designed with matching tenons and mortises.

[0012] In an optional embodiment of this invention, the rotor structure further includes clamps for clamping the multiple sector-shaped iron core blocks located on the outer periphery of the multiple sector-shaped iron core blocks away from the non-magnetic fasteners.

[0013] In an optional embodiment of this utility model, the air gap magnetic barrier structure includes three layers of air gap magnetic barrier slots disposed on the fan-shaped iron core block and distributed radially at intervals along the rotor structure.

[0014] In an optional embodiment of this invention, the central symmetry line of the air gap magnetic barrier structure is the intersection axis of the magnetic circuit of the rotor structure; and The center line of each pair of adjacent sector-shaped iron core blocks is the direct axis of the magnetic circuit of the rotor structure.

[0015] In an optional embodiment of this invention, each layer of the air gap magnetic barrier groove extends circumferentially along the sector-shaped iron core block, forming a pair of magnetically insulating bridges with ends parallel to the outer circular wall surface of the sector-shaped iron core block; and The width of the pair of magnetic isolation bridges in each layer of the air gap magnetic barrier groove is the same, and the magnetic isolation bridges in the air gap magnetic barrier grooves of different layers are also the same.

[0016] The machining method of the rotor structure of this utility model is implemented as follows: The reluctance motor of this invention is implemented as follows: A reluctance motor includes at least the rotor structure and the stator structure described above.

[0017] In an optional embodiment of this utility model, the number of sector-shaped iron core blocks included in the rotor structure should be the same as the number of pole pairs of the armature winding of the stator structure.

[0018] By adopting the above technical solution, the present invention has the following beneficial effects: The rotor structure of the present invention and the reluctance motor using it are designed with multiple fan-shaped iron core blocks that are not connected to each other and are discretely arranged in a pole-divided manner, combined with non-magnetic fasteners. The overall rotor structure is divided into multiple fan-shaped iron core blocks with the same number of pole pairs as the stator structure, and a natural air gap is formed between the poles. This greatly increases the cross-axis reluctance and reduces the cross-axis inductance, while maintaining the integrity of the direct-axis magnetic circuit without significant increase in its reluctance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the rotor structure of this utility model applied to a specific reluctance motor. Figure 2 This is a schematic diagram showing the rotor structure of this utility model applied in a specific reluctance motor, in a decomposed state compared to the stator structure. Figure 3 This is a schematic diagram showing the layout of multiple sector-shaped iron core blocks in the rotor structure of this utility model. Figure 4 This is a partial structural diagram of the air gap magnetic barrier groove of a sector-shaped iron core block in the rotor structure of this utility model. Figure 5 This is a schematic diagram of the non-magnetic fastener of the rotor structure of this utility model; Figure 6 This is a schematic diagram of a sector-shaped iron core block in the rotor structure of this utility model; Figure 7 A comparison diagram of the right-angle shaft inductance of the rotor structure using this utility model and the monolithic rotor structure in the prior art; Figure 8 This is a comparison diagram of the electromagnetic torque of the rotor structure using this utility model and the monolithic rotor structure in the prior art under the same working conditions. Figure 9 This is a schematic diagram of the magnetic circuit of the rotor structure using this utility model.

[0020] In the figure: non-magnetic fastener 1, main body 11, extension 12, shaft hole 13, fan-shaped iron core block 2, air gap magnetic barrier groove 3, first layer magnetic barrier groove 1, second layer magnetic barrier groove 32, third layer magnetic barrier groove 33, transverse groove 34, oblique groove 35, magnetic isolation bridge 36, tenon 41, mortise 42, stator structure 5, winding 6. Detailed Implementation

[0021] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0022] Example 1: Please see Figures 1 to 9 As shown, this embodiment provides a rotor structure, including: a non-magnetic fastener 1, and a plurality of unconnected and discrete sector-shaped iron core blocks 2 uniformly arranged around the center of the non-magnetic fastener 1; each sector-shaped iron core block 2 is adapted to be connected to the circumferential outer wall of the non-magnetic fastener 1; wherein each sector-shaped iron core block 2 is provided with an air gap magnetic barrier structure. For each sector-shaped iron core block 2 in this embodiment, it can be made of stacked silicon steel sheets or die-cast from a single piece of soft magnetic composite material (SMC).

[0023] Specifically, the air gap magnetic barrier structure of this embodiment includes at least one layer of air gap magnetic barrier grooves 3 penetrating both ends of the axial direction of the fan-shaped iron core block 2, and each layer of air gap magnetic barrier grooves 3 extends circumferentially along the fan-shaped iron core block 2. The number, shape, and size of the air gap magnetic barrier grooves 3 in each fan-shaped iron core block 2 can be flexibly selected and designed according to the performance requirements of the motor. This embodiment, in conjunction with the accompanying drawings, uses the case where the air gap magnetic barrier structure includes three layers of air gap magnetic barrier grooves 3 disposed on the fan-shaped iron core block 2 and radially spaced along the rotor structure. The three layers of air gap magnetic barrier grooves 3, arranged radially along the rotor structure from the center of the non-magnetic fastener 1, are respectively the first layer magnetic barrier groove 31, the second layer magnetic barrier groove 32, and the third layer magnetic barrier groove 33.

[0024] Regarding the connection structure formed between the multiple sector-shaped iron core blocks 2 and the non-magnetic fastener 1 in this embodiment, in the first optional case, the rotor structure further includes a clamp provided on the outer periphery of the multiple sector-shaped iron core blocks 2 away from the non-magnetic fastener 1 for clamping the multiple sector-shaped iron core blocks 2. That is, the tight fit between each sector-shaped iron core block 2 and the non-magnetic fastener 1 is achieved by the clamping action of the clamp, and there is no specific fit structure between the two.

[0025] In the second alternative scenario, to avoid the use of clamps, as illustrated in the attached diagram, each sector-shaped iron core block 2 is designed with a mortise and tenon structure suitable for plug-in mating between it and the non-magnetic fastener 1.

[0026] Based on the above, more specifically, the mortise and tenon structure includes at least one pair of matching tenons 41 and mortises 42; wherein the tenon 41 is provided on the wall surface of the sector-shaped iron core block 2 facing the non-magnetic fastener 1, and the mortise 42 is provided on the wall surface of the non-magnetic fastener 1 facing the sector-shaped iron core block 2; or the mortise 42 is provided on the wall surface of the sector-shaped iron core block 2 facing the non-magnetic fastener 1, and the tenon 41 is provided on the wall surface of the non-magnetic fastener 1 facing the sector-shaped iron core block 2. When two or more pairs of tenons 41 and mortises 42 are provided, tenons 41 and mortises 42 can be simultaneously provided on the non-magnetic fastener 1, and correspondingly, mortises 42 and tenons 41 can be simultaneously provided on the sector-shaped iron core block 2. All three cases satisfy the usage requirements of this embodiment. The mortise and tenon structure achieves the integration of the non-magnetic fastener 1 and the sector-shaped iron core block 2, ensuring the mechanical strength of the rotor structure while achieving inter-pole isolation, preventing displacement of the sector-shaped iron core block 2 due to high-speed rotation, and improving operational reliability.

[0027] Based on the above, it is also necessary to explain that, regarding the tenon 41 and mortise 42 in this embodiment, from the perspective of facilitating the assembly of the fan-shaped iron core block 2 and the non-magnetic fastener 1, both the tenon 41 and the mortise 42 extend along the axial direction of the rotor structure. This allows the assembly process between the fan-shaped iron core block 2 and the non-magnetic fastener 1 to be completed simply by inserting along the axial direction of the rotor structure without the need for additional auxiliary tools.

[0028] Next, it will be specifically explained that the non-magnetic fastener 1 in this embodiment includes a main body 11 and a plurality of extensions 12 spaced apart and evenly distributed on the circumferential side of the main body 11; each extension 12 extends radially along the rotor structure. The shape of the main body 11 can be regular, for example, but not limited to, a circle, a square, or a rhombus. This embodiment does not impose an absolute limitation on this; the accompanying drawings only show a square main body 11 as an example. The main body 11 has a shaft hole 13 formed in it, extending axially along the rotor structure, to facilitate mating with the motor shaft. The extensions 12, relative to the main body 11, can be understood as having a strip-like structure.

[0029] Based on the above, it should be noted that the specific shape of each layer of air gap magnetic barrier groove 3 used in this embodiment can be regular, such as but not limited to, an arc-shaped groove, or it can be an irregular shape. This embodiment does not make an absolute limitation on this. Here, with reference to the accompanying drawings, an optional implementation is described in detail. The three layers of air gap magnetic barrier groove 3 have roughly the same shape. Generally, each layer of air gap magnetic barrier groove 3 includes a transverse groove 34 parallel to the edge of the main body 11 (here, the edge of the main body 11 specifically refers to the edge connected to the fan-shaped iron core block 2 corresponding to the layer of air gap magnetic barrier groove 3), and a pair of symmetrically arranged oblique grooves 35 that are bent and connected to the two ends of the transverse groove 34 respectively; and each oblique groove 35 is distributed on the side of the transverse groove 34 facing away from the main body 11, and each oblique groove 35 is generally parallel to the extension 12 of the non-magnetic fastener 1. Here, for the three layers of air gap magnetic barrier groove 3, the included angle between the transverse groove 34 and the oblique groove 35 can be designed to be the same. Furthermore, the spacing between any two adjacent air gap magnetic barrier slots 3 can be the same or different; this embodiment does not impose an absolute limitation on this.

[0030] In this embodiment, the central symmetry line of the air gap magnetic barrier structure (each layer of air gap magnetic barrier slot 3) is the quadrature axis (q-axis) of the magnetic circuit of the rotor structure; and the central line of each pair of adjacent sector-shaped iron core blocks 2 is the direct axis (d-axis) of the magnetic circuit of the rotor structure; furthermore, the iron core and magnetic bridge between different layers of air gap magnetic barrier slots 3 of the sector-shaped iron core block 2 constitute the direct axis (d-axis) magnetic circuit part of the rotor structure, and the air gap between the multi-layer air gap magnetic barrier slots 3 and the sector-shaped iron core block 2 constitutes the quadrature axis (q-axis) magnetic circuit part of the rotor structure. The span between the direct axis and the quadrature axis here corresponds to the pole pitch of the stator structure 5 of the reluctance motor of this embodiment, and this design can better match the segmented pole and block structure.

[0031] Based on the above, in a specific optional implementation, for each layer of air gap magnetic barrier slot 3, the width of the transverse slot 34 is greater than that of the oblique slot 35. In this way, the magnetic reluctance of the direct axis (d-axis) of the rotor structure can be increased by increasing the width of the middle part of the air gap magnetic barrier slot 3, thereby reducing the quadrature axis (q-axis) inductance of the rotor structure, increasing the difference between the q-axis inductance and the d-axis inductance, and thus increasing the magnetic reluctance torque of the reluctance motor using the rotor structure of this embodiment.

[0032] Furthermore, it should be noted that in this embodiment, each layer of air gap magnetic barrier slot 3 extends circumferentially along the sector-shaped iron core block 2, forming a pair of magnetic isolation bridges 36 with ends parallel to the outer circular wall surface of the sector-shaped iron core block 2; and the width of the pair of magnetic isolation bridges 36 in each layer of air gap magnetic barrier slot 3 is the same, and the magnetic isolation bridges 36 in different layers of air gap magnetic barrier slot 3 are also the same. Since there are no permanent magnets in the rotor structure of this embodiment, the addition of magnetic isolation bridges 36 will not cause severe saturation and can provide a complete circuit, thus increasing the mechanical strength of the rotor structure. Moreover, the iron core channel and magnetic isolation bridge 36 structure formed between different layers of air gap magnetic barrier slots 3 ensure the low magnetic resistance characteristics of the direct-axis magnetic circuit. The design of the three-layer air gap magnetic barrier slot 3 increases the quadrature-axis air gap, which significantly increases the magnetic reluctance of the quadrature-axis magnetic circuit of the motor using the rotor structure of this embodiment, effectively reducing the quadrature-axis inductance of the reluctance motor. However, it has little effect on the direct-axis magnetic circuit formed by the iron core channel between the different layers of air gap magnetic barrier slots 3, that is, it has little effect on the direct-axis inductance of the reluctance motor using the rotor structure of this embodiment. The reduction in quadrature-axis inductance is greater than the reduction in direct-axis inductance, thereby effectively improving the saliency ratio of the reluctance motor. The saliency ratio is directly related to the magnitude of the motor output electromagnetic torque, which can increase the torque value.

[0033] Based on the above structure, it should be further explained that the number of extensions 12 is the same as the number of sector-shaped iron core blocks 2; and each extension 12 is suitable for simultaneously engaging with two sector-shaped iron core blocks 2. Therefore, each extension 12 can be understood as forming a gap between two adjacent sector-shaped iron core blocks 2, so that adjacent sector-shaped iron core blocks 2 along the circumferential direction of the rotor structure are not directly connected but separated. Furthermore, the design of the extensions 12 improves the fixing effect on the sector-shaped iron core blocks 2, allowing for at least three insertion fixing points for each sector-shaped iron core block 2. For this purpose, the main body 11 and each extension 12 have matching tenons 41 and mortises 42 designed between their sidewalls facing the sector-shaped iron core blocks 2 and the sector-shaped iron core blocks 2. In this embodiment, the design of the extensions 12 separates each pair of adjacent sector-shaped iron core blocks 2 along the circumferential direction. (See reference...) Figure 9As shown, with the design of extension 12, the magnetic circuit between the two poles is the q-axis magnetic circuit (as indicated by the arrow). By truncating it, the magnetic reluctance can be increased, the q-axis inductance reduced, and the magnetic leakage flux completely isolated. Although the d-axis magnetic circuit will also be affected to some extent, the impact is small and negligible compared to the q-axis impact. Overall, the improvement in saliency ratio is significant. Its effect is equivalent to a magnetically isolated bridge with infinite magnetic reluctance. Furthermore, by observing the direction of the magnetic field lines, it can be seen that there is less magnetic leakage at the non-magnetic fastener 1. Using the non-magnetic fastener 1 can also save the amount of silicon steel sheets, reduce rotor weight, reduce rotational inertia, and improve smooth operation. Based on this, according to the formula: saliency ratio = Ld / Lq, as shown... Figure 7 As shown, the rotor structure in this embodiment significantly reduces the quadrature-axis inductance, increasing the saliency ratio from 24.29 / 6.16=3.9 to 22.49 / 4.67=4.8, an improvement of 23%. Figure 8 As shown, the average torque of the reluctance motor using the rotor structure of this embodiment is 2.1 Nm, while the average torque of the reluctance motor using the traditional monolithic rotor structure is 1.78 Nm, representing an 18% increase under the same operating conditions. Therefore, the reluctance motor using the rotor structure of this embodiment has a higher saliency ratio than the monolithic rotor structure, increasing the reluctance torque and thus the electromagnetic torque, thereby improving motor performance. Based on this, for the reluctance motor using the rotor structure of this embodiment, it is no longer necessary to embed magnets in the air gap magnetic barrier slots (eliminating the use of magnets makes the rotor structure of this embodiment lower in cost and allows for a higher upper limit of the operating temperature). Therefore, this embodiment can still increase permanent magnet torque and improve motor performance while reducing the use of magnets.

[0034] The specific processing procedure for the rotor structure, which uses a plug-in connection to connect the sector-shaped iron core block 2 and the non-magnetic fastener 1, is as follows: Step S1: Generate non-magnetic firmware 1 using a non-magnetic material; the non-magnetic material here can be, for example, but not limited to, high-strength non-magnetic materials such as stainless steel and aluminum alloy.

[0035] Step S2: Process and generate multiple sector-shaped iron core blocks 2, and hollow out at least one layer of air gap magnetic barrier grooves 3 that penetrate both ends of the axial direction of the sector-shaped iron core blocks 2. For each sector-shaped iron core block 2 in this embodiment, it can be made of stacked silicon steel sheets or die-cast from a single piece of soft magnetic composite material (SMC).

[0036] Step S3: Connect each sector-shaped iron core block 2 to the non-magnetic fastener 1. Taking the mortise and tenon structure between the sector-shaped iron core block 2 and the non-magnetic fastener 1 as an example, each sector-shaped iron core block 2 only needs to be connected to the non-magnetic fastener 1 along the axial direction of the rotor structure. This assembly process can be completed without the need for specific tools.

[0037] Compared to the segmented rotor core structure within poles in the prior art, the rotor structure proposed in this embodiment is an inter-pole segmented structure, retaining the integrity of one pole and including the structure of the magnetic bridge 36. This structure increases the magnetic reluctance of the quadrature-axis magnetic circuit (i.e., reduces the quadrature-axis inductance). Furthermore, the air gap formed by hollowing out the fan-shaped core block 2 further increases the magnetic reluctance of the quadrature-axis magnetic circuit and reduces the quadrature-axis inductance, while increasing the air gap of the armature reaction quadrature-axis magnetic circuit, significantly increasing the magnetic reluctance of the quadrature-axis magnetic circuit. The rotor core and the magnetic bridge 36 between the air gap magnetic barrier slots 3 of different layers constitute the path of the direct-axis magnetic circuit. The use of a discrete core block rotor structure does not affect the magnetic reluctance of the direct-axis magnetic circuit, that is, it does not affect the direct-axis inductance of the synchronous reluctance motor, effectively improving the utilization rate of reluctance torque. Thus, the reluctance motor using the rotor structure of this embodiment has a higher saliency ratio and a higher torque value compared to the traditional monolithic rotor structure synchronous reluctance motor.

[0038] In summary, this embodiment increases the difference between the direct and quadrature shaft inductances of the reluctance motor using the rotor structure of this embodiment by using a design that separates multiple fan-shaped iron core blocks 2 along the circumferential direction, combined with the design of the air gap magnetic barrier slots 3 and the pole-splitting structure. This increases the saliency ratio of the reluctance motor, thereby increasing the reluctance torque and thus the electromagnetic torque, and ultimately improving the performance of the reluctance motor. In contrast, the existing segmented rotor structure uses a segmented form under the same pole to eliminate permanent magnet losses caused by the magnetic isolation bridge, thereby improving permanent magnet torque utilization and motor efficiency. Furthermore, the existing segmented structure is related to the number of poles and the number of magnetic barrier layers, resulting in a large number of parts composing the rotor structure. Each segmented structure requires multiple pieces to be riveted together, and combined with the assembly requirements of the permanent magnets, this increases the complexity of the overall rotor structure installation process. This assembly structure also creates numerous installation gaps inside the rotor structure, which may affect the motor's performance.

[0039] Example 2: Based on the rotor structure of Embodiment 1, this embodiment provides a reluctance motor, which includes at least the rotor structure of Embodiment 1 and a stator structure 5. Regarding the stator structure 5, it can be selected from any mature means in the prior art; for example, its general structure includes a three-phase AC winding 6 and a stator core.

[0040] It should be noted that, in one optional implementation, the number of sector-shaped iron core blocks 2 in the rotor structure used in this embodiment should be the same as the number of pole pairs of the armature winding of the stator structure 5. This embodiment proposes a pole-slot matching method using a split-pole structure, where the slot distribution ensures that the two ends of the coil of a single AC winding 6 in the same phase correspond exactly to the minimum magnetic reluctance magnetic circuit of the sector-shaped iron core block 2, thereby reducing inductance and better matching the discrete split-pole rotor structure. The number of slots can be selected from 2 to 3 per phase per stage, and the number of poles can be calculated based on the number of sector-shaped iron core blocks 2. The rotor structure is designed as multiple unconnected and discretely split-pole sector-shaped iron core blocks 2, dividing the traditional integral rotor core into sector-shaped iron core blocks 2 with the same number of pole pairs as the armature winding of the stator structure 5, and forming a natural air gap between the poles. This significantly increases the quadrature-axis magnetic reluctance and reduces the quadrature-axis inductance, while maintaining the integrity of the direct-axis magnetic circuit without significantly increasing its magnetic reluctance.

[0041] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above are only specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0042] In the description of this utility model, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0045] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0046] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

Claims

1. A rotor structure, characterized in that, include: Non-magnetic fasteners, and multiple unconnected and discrete sector-shaped iron core blocks uniformly arranged around the center of the non-magnetic fasteners. Each of the aforementioned sector-shaped iron core blocks is adapted to be connected to the circumferential outer wall of a non-magnetic fastener; in Each of the aforementioned sector-shaped iron core blocks is provided with an air gap magnetic barrier structure; and The air gap magnetic barrier structure includes at least one layer of air gap magnetic barrier grooves that penetrate both ends of the fan-shaped iron core block, and each layer of air gap magnetic barrier grooves extends circumferentially along the fan-shaped iron core block.

2. The rotor structure according to claim 1, characterized in that, Each of the aforementioned sector-shaped iron core blocks is adapted to be inserted into the circumferential outer wall of the non-magnetic fastener; and each of the aforementioned sector-shaped iron core blocks and the non-magnetic fastener is designed with a mortise and tenon structure suitable for insertion.

3. The rotor structure according to claim 2, characterized in that, The mortise and tenon structure includes at least one pair of matching tenons and mortises; wherein The tenon is provided on the wall surface of the sector-shaped iron core block facing the non-magnetic fastener, and the mortise is provided on the wall surface of the non-magnetic fastener facing the sector-shaped iron core block; or The mortise is provided on the wall surface of the fan-shaped iron core block facing the non-magnetic fastener, and the tenon is provided on the wall surface of the non-magnetic fastener facing the fan-shaped iron core block.

4. The rotor structure according to claim 3, characterized in that, The non-magnetic fastener includes a main body and a plurality of extensions spaced apart and evenly distributed on the circumferential side of the main body; each extension extends radially along the rotor structure; wherein The main body has a shaft hole that extends axially along the rotor structure.

5. The rotor structure according to claim 4, characterized in that, The number of the extensions is the same as the number of the sector-shaped iron core blocks; and Each of the extensions is adapted to mate with two sector-shaped iron core blocks simultaneously, and the sidewalls of the main body and each extension facing the sector-shaped iron core block are designed with matching tenons and mortises.

6. The rotor structure according to claim 1, characterized in that, The rotor structure also includes clamps located on the outer periphery of the multiple sector-shaped iron core blocks away from the non-magnetic fasteners for clamping the multiple sector-shaped iron core blocks.

7. The rotor structure according to any one of claims 1 to 6, characterized in that, The air gap magnetic barrier structure includes three layers of air gap magnetic barrier slots arranged on the fan-shaped iron core block and distributed radially at intervals along the rotor structure.

8. The rotor structure according to claim 1, characterized in that, The central symmetry line of the air gap magnetic barrier structure is the intersection axis of the magnetic circuit of the rotor structure; and The center line of each pair of adjacent sector-shaped iron core blocks is the direct axis of the magnetic circuit of the rotor structure.

9. The rotor structure according to claim 1, characterized in that, Each layer of the air gap magnetic barrier groove extends circumferentially along the fan-shaped iron core block, forming a pair of magnetically insulating bridges whose ends are parallel to the outer circular wall surface of the fan-shaped iron core block; and The width of the pair of magnetic isolation bridges in each layer of the air gap magnetic barrier groove is the same, and the magnetic isolation bridges in the air gap magnetic barrier grooves of different layers are also the same.

10. A reluctance motor, characterized in that, At least including: The rotor structure and stator structure as described in any one of claims 1 to 9.

11. The reluctance motor according to claim 10, characterized in that, The number of sector-shaped iron core blocks included in the rotor structure should be the same as the number of pole pairs of the armature winding of the stator structure.

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