Motor rotor, self-starting synchronous reluctance motor and compressor

Abstract

A motor rotor, a self-starting synchronous reluctance motor, and a compressor are provided. The motor rotor includes a rotor core, the rotor core includes a first rotor punching plate (1), the first rotor punching plate (1) is provided with a fill groove and a rotor groove (2), the fill groove includes a second fill groove (32) and a first fill groove (31), the first rotor punching plate (1) is provided with a plurality of magnetic barrier layers spaced apart along the q axis, the plurality of magnetic barrier layers includes two outer magnetic barrier layers and a plurality of inner magnetic barrier layers located between the two outer magnetic barrier layers, the outer magnetic barrier layers include a first fill groove (31), the inner magnetic barrier layers include a rotor groove (2) and a second fill groove (32) located at both ends of the rotor groove (2), and the inner magnetic barrier layers of the same layer have a dividing rib (5) between the second fill groove (32) and the rotor groove (2).

Description

Technical Field

[0005]

[0001] The present invention belongs to the technical field of motors, and specifically relates to a motor rotor, a self-starting synchronous reluctance motor thereof, and a compressor.

[0002] This application claims the priority of a Chinese patent application with an application number of 202210092265.3 and an application title of "Motor Rotor, Its Self-Starting Synchronous Reluctance Motor and Compressor", which was filed with the China Patent Office on January 26, 2022. Here, the entire content is incorporated herein by reference.

Background Art

[0003] The self-starting synchronous reluctance motor is based on the synchronous reluctance motor and combines the advantages of an asynchronous motor. It can achieve self-starting by the asynchronous torque generated by the rotor bars and does not need to be driven by an inverter. Compared with an asynchronous motor, the motor can operate at a constant speed, has low rotor losses, and improves efficiency during synchronous operation. Compared with an asynchronous starting type permanent magnet synchronous motor, since this motor does not use a permanent magnet material, it has a low cost and there is no problem of demagnetization of the permanent magnet. However, due to the multi-layer magnetic barrier layer structure of the self-starting synchronous reluctance motor, there is a problem that the harmonics of the motor are large.

Summary of the Invention

Problems to be Solved by the Invention

[0004] <00000I9>Therefore, the present invention provides a motor rotor, a self-starting synchronous reluctance motor thereof, and a compressor that can solve the defect that the harmonics of the motor are large because the motor rotor of the self-starting synchronous reluctance motor in the prior art has a multi-layer magnetic barrier layer structure.

Means for Solving the Problems

[0005] To solve the above problems, the present invention provides a motor rotor comprising a first rotor punched plate, the first rotor punched plate having filling grooves and rotor grooves, the filling grooves comprising a second filling groove and a first filling groove, the first rotor punched plate having multiple magnetic barrier layers spaced along the q-axis, the multiple magnetic barrier layers comprising two outer magnetic barrier layers and multiple inner magnetic barrier layers located between the two outer magnetic barrier layers, the outer magnetic barrier layers comprising a first filling groove, and the inner magnetic barrier layers comprising rotor grooves and located at both ends of the rotor grooves. two A second filling groove is included, and in the inner magnetic barrier layer of the same layer, there is a dividing rib between the second filling groove and the rotor groove, and the center point is in the axial plane where the side edge of the dividing rib closest to the outer circle of the rotor is located, and any two adjacent layers inside The distance in the d-axis direction between the two center points corresponding to the two segmented ribs in the magnetic barrier layer is L, and the two adjacent layers inside The maximum distance in the q-axis direction of the magnetic conduction channel formed between the packing grooves in the magnetic barrier layer is W, and 0 ≤ L < 2W.

[0006] In some embodiments, 0 ≤ L <Wである。

[0007] In some embodiments, 0 ≤ L ≤ 0.8W.

[0008] In some embodiments, adjacent to the first filling groove outermost layer The width of the segmented rib in the inner magnetic barrier layer in the d-axis direction is L1, and the first rotor punched plate has an axial hole, adjacent to the axial hole. Innermost layer The width of the segmented rib in the inner magnetic barrier layer in the d-axis direction is L2, L1 is greater than or equal to L2, and L1 ≥ 0.5 * σ.

[0009] In some embodiments, the center point of the segmented rib lies in the axial plane where the side edge of the rotor closer to the outer circle is located, and the outermost layer is closer to the rotor's outer circle. inside Divided ribs of the magnetic barrier layer and adjacent to them Next outer layer inside The distance in the d-axis direction between the two center points corresponding to the divided ribs of the magnetic barrier layer is k7, and this is the outermost layer closest to the outer circle side of the rotor. insideDivided ribs of the magnetic barrier layer and the innermost layer near the rotor shaft hole. inside The distance in the d-axis direction between the two center points corresponding to the segmented ribs of the magnetic barrier layer is k8, and 0 ≤ k7 / k8 ≤ 0.6.

[0010] In some embodiments, the filling grooves are located on the outer circumference of the rotor, in the innermost layer closest to the shaft bore. inside The distance between the second filling groove in the magnetic barrier layer and the outer circle of the rotor is L3, and it is close to the outer circle side of the rotor. outside The distance between the first filling groove of the magnetic barrier layer and the outer circle of the rotor is L4, and L4 ≥ L3 and 0 ≤ L3 ≤ 2.5σ.

[0011] In some embodiments, the maximum width in the q-axis direction of the end of the filling groove near the outer circle side of the rotor is less than or equal to the maximum width in the q-axis direction of the region of the filling groove near the q-axis of the rotor.

[0012] In some embodiments, the width deviation in the q-axis direction of the filling groove from the outer circle side of the rotor to the q-axis of the rotor is 5% or less.

[0013] In some embodiments, the ratio of the maximum width to the minimum width of the filling groove in the q-axis direction is τ, where 1 ≤ τ ≤ 2.

[0014] In some embodiments, the maximum width of the second filling groove in each inner magnetic barrier layer in the d-axis direction gradually increases along the direction from the outer circle of the q-axis rotor toward the center of the shaft hole.

[0015] In some embodiments, along the direction from the outer circle of the q-axis rotor toward the center of the shaft hole, the maximum width of each second filling groove in the d-axis direction increases in at least three consecutive layers, and / or along the direction from the center of the q-axis shaft hole 4 toward the outer circle of the rotor toward the d-axis. Next inner layer Closer to the outer circle side of the rotor from the inner magnetic barrier layer innermost outer layer Up to the magnetic barrier layer, the maximum width of each second filling groove in the d-axis direction decreases continuously.

[0016] In some embodiments, the rotor groove consists of arc portions and / or straight portions, and the radius of curvature of the arc portions of the rotor groove gradually increases from the shaft hole side to the outer circle side of the rotor, and the radius of curvature of the outer arc of the rotor groove in the same layer is greater than the radius of curvature of the inner arc, the arc portions protrude from the shaft hole toward the outer circle of the rotor, or both ends of the rotor groove extend toward the outer circle of the rotor in a direction parallel to the d axis to become straight portions, and both ends of part or all of the rotor groove are parallel to the d axis, and the rotor groove In the q-axis direction The width gradually increases from the center of the rotor groove towards both ends.

[0017] In some embodiments, along the direction from the center of the q-axis axial hole 4 toward the outer circle of the rotor, the width of the rotor groove in the q-axis direction decreases in at least three consecutive layers, the width of the rotor groove in the q-axis direction is m2, the width of the first filling groove in the q-axis direction is m1, the sum of the widths of all rotor grooves and the first filling groove in the q-axis direction is (m1 + Σm2), the width from the hole wall of the axial hole to the outer circle of the first rotor punched plate is m3, and (m1 + Σm2) / m3 = 0.2 to 0.5.

[0018] In some embodiments, the filling grooves in the first rotor punching plate have at least five types of filling grooves with different filling areas, and / or the total filling area of ​​the first and second filling grooves accounts for 30% to 70% of the total cross-sectional area of ​​the first filling groove, the second filling groove, and the rotor grooves.

[0019] In some embodiments, the minimum width of the magnetic conduction channel between two adjacent filling grooves in two adjacent magnetic barrier layers is W1, where W1 ≥ d, and d is the minimum width of the magnetic conduction channel between rotor grooves in the two adjacent magnetic barrier layers.

[0020] In some embodiments, W1 / d > 1.15.

[0021] In some embodiments, two adjacent layers inside The minimum distance in the q-axis direction of the magnetic conduction channel between two adjacent rotor grooves in the magnetic barrier layer is h1, where h1 ≥ 1.5h2, and h2 is equal to the distance between the two adjacent layers. inside Among the magnetic barrier layers, it is the minimum width in the q-axis direction of the magnetic barrier layer with a small width in the q-axis direction of the rotor groove.

[0022] In some embodiments, the width of the first filling groove in the d-axis direction is smaller than the width in the d-axis direction between the ends closer to the rotor groove of the two second filling grooves in the adjacent innermost outer layer magnetic barrier layer.

[0023] In some embodiments, the ratio of the distance L5 from the inner wall of the first filling groove to the center of the rotor to the radius Rr of the rotor in the q-axis direction satisfies 0.82 ≤ L5 / Rr ≤ 0.96.

[0024] In some embodiments, the two innermost layers close to the shaft hole side inside The ratio of the distance in the q-axis direction of the side closer to the shaft hole side of the magnetic barrier layer to The rotor the width in the q-axis direction of the rotating shaft is greater than 1.2, and / or the diameter of the arc portion of the side closer to the shaft hole side of the innermost layer inside magnetic barrier layer to the width in the q-axis direction of the rotating shaft is greater than 2.

[0025] In some embodiments, the maximum thickness of the first filling groove in the q-axis direction is k, and the maximum thickness of the second filling groove in the q-axis direction in the adjacent innermost outer layer magnetic barrier layer is k1, and the minimum thickness of the magnetic conduction channel connected thereto in the q-axis direction is k2, 1 < k / k1 ≤ 2, and / or 0.8 < k / k2 ≤ 1.6.

[0026] In some embodiments, a magnetic conduction channel is formed between two adjacent magnetic barrier layers, and along the direction from the center of the shaft hole 4 of the q-axis to the outer circle of the rotor, the width of each magnetic conduction channel in the q-axis direction gradually decreases.

[0027] In some embodiments, along the direction from the center of the q-axis axial hole 4 toward the outer circle of the rotor, the width of each magnetic conduction channel in the q-axis direction decreases continuously for at least three layers, and / or a magnetic conduction channel is formed between two adjacent magnetic barrier layers, and the width of the magnetic conduction channel gradually increases from the q-axis to both sides of the q-axis, with respect to the magnetic conduction channel consisting of an arc portion and a straight portion.

[0028] In some embodiments, each layer inside In the magnetic barrier layer, the ratio of the width of the rotor groove in the q-axis direction to the width of the end of the rotor groove near the filling groove is τ1, and the innermost layer inside From the magnetic barrier layer to the outermost layer inside τ1 gradually increases up to the magnetic barrier layer.

[0029] In some embodiments, in the magnetic barrier layer of each layer, the ratio of the maximum width of the filling groove in the q-axis direction to the width of the rotor groove in the q-axis direction is τ2, where τ2 > 1.4.

[0030] In some embodiments, the outer layer near the outer circle side of the rotor Next outer layer inside In the magnetic barrier layer, the width in the d-axis direction between the ends of the two second filling grooves located at both ends of the rotor groove, closer to the rotor groove, is k3, and adjacent to it, closer to the shaft hole side Next inner layer In the magnetic barrier layer, the width in the d-axis direction between the ends of the two second filling grooves located at both ends of the rotor groove, on the side closer to the rotor groove, is k4, and 0.5 ≤ k3 / k4 ≤ 1, or 0.5 ≤ k4 / k3 ≤ 1.

[0031] In some embodiments, the width in the d-axis direction between the ends of the two second filling grooves at both ends of the outermost rotor groove near the outer circle side of the rotor, k5, and the width in the d-axis direction between the ends of the two second filling grooves at both ends of the innermost rotor groove near the shaft hole side of the rotor, k6, such that 0.5 ≤ k5 / k6 ≤ 1, or 0.5 ≤ k6 / k5 ≤ 1.

[0032] In some embodiments, the angle between the line connecting both ends of the first filling groove and the center of the rotor is α1, where 20° ≤ α1 ≤ 60°, and / or the number of first filling grooves is n, where n ≥ 2 The condition is met, and / or the deviation in parallelism between the longitudinal extension direction of the filling groove and the d-axis is 5% or less.

[0033] In some embodiments, the maximum width of the axial hole of the first rotor punching plate in the q-axis direction is less than or equal to its maximum width in the d-axis direction, and / or the axial hole is composed of an arc portion and / or a straight portion.

[0034] In some embodiments, the rotor core further includes a second rotor punching plate, which is provided between the end ring and the first rotor punching plate, and the second rotor punching plate is provided with a communication groove corresponding to the filling groove.

[0035] In some embodiments, the maximum width of the outer contour of the second rotor punching plate is less than or equal to the outer diameter of the first rotor punching plate, the maximum width of the inner hole of the second rotor punching plate in the q-axis direction is greater than or equal to its maximum width in the d-axis direction, and / or the axial thickness of the second rotor punching plate is greater than or equal to the thickness of one of the first rotor punching plates.

[0036] In some embodiments, the ratio of the maximum width in the q-axis direction to the maximum width in the d-axis direction of the inner hole of the second rotor punching plate is 1 to 1.5.

[0037] In some embodiments, the radial width between the inner hole of the second rotor punching plate and its outer circle is smallest in the q-axis direction, and the radial width kd2 in the d-axis direction and the radial width kq2 in the q-axis direction of the second rotor punching plate satisfy 1.1 ≤ kd2 / kq2 ≤ 2.8.

[0038] In some embodiments, 1.2 ≤ kd² / kq² ≤ 1.8.

[0039] In some embodiments, the total cross-sectional area of ​​the connecting grooves in the second rotor punching plate is less than or equal to the total cross-sectional area of ​​the filling grooves in the first rotor punching plate.

[0040] In some embodiments, the communication grooves provided in the second rotor punching plate are in the same position as the filling grooves provided in the first rotor punching plate, and the cross-sectional area of ​​a single communication groove in the second rotor punching plate is less than or equal to the cross-sectional area of ​​a single filling groove in the first rotor punching plate located in the same position.

[0041] In some embodiments, the width in the d-axis direction between the internal hole of the second rotor punching plate and the communication groove is greater than the width in the d-axis direction of the dividing rib between the communication groove and the corresponding rotor groove.

[0042] In some embodiments, the total cross-sectional area of ​​the rotor grooves located on the inner circumference side of the inner bore of the second rotor punching plate in the first rotor punching plate accounts for at least 20% of the total flow area of ​​the motor's flow grooves, and / or the total cross-sectional area of ​​the rotor grooves located within the inner bore of the second rotor punching plate in the first rotor punching plate accounts for at least 30% of the total cross-sectional area of ​​the rotor grooves.

[0043] In some embodiments, the total cross-sectional area of ​​the rotor grooves located on the inner circumference side of the inner bore of the second rotor punching plate in the first rotor punching plate accounts for 25% to 40% of the total flow area of ​​the motor's flow grooves, and / or, the total cross-sectional area of ​​the rotor grooves located within the inner bore of the second rotor punching plate in the first rotor punching plate accounts for 45% to 65% of the total cross-sectional area of ​​the rotor grooves.

[0044] In some embodiments, each layer of the first rotor punching plate is located on the inner circumference side of the inner hole of the second rotor punching plate, along the direction from the center of the rotor's axial hole toward the outer circle of the rotor. inside The cross-sectional area of ​​the rotor grooves in the magnetic barrier layer gradually decreases.

[0045] In some embodiments, the maximum width of the outer contour of the end ring is less than or equal to the maximum width of the outer contour of the second rotor punching plate, the maximum distance from the center of the rotor shaft hole to the end face of the end ring is greater than or equal to the maximum distance from the center of the rotor shaft hole to the end face of the second rotor punching plate, and / or the radial width in the d-axis direction between the inner hole and outer circle of the end ring is k9, the radial width in the q-axis direction is k10, and 1.1 ≤ k9 / k10 ≤ 2.8.

[0046] In some embodiments, 1.2 ≤ k9 / k10 ≤ 1.8.

[0047] In some embodiments, a balance block is attached to the end ring, and the balance block is located on the side of the end ring where the radial width between the inner hole and the outer circle is greater.

[0048] In some embodiments, a conductive nonmagnetic material is filled into at least some of the filling grooves, and a short circuit is achieved through end rings at both ends of the second rotor punching plate, thereby forming a cage.

[0049] In some embodiments, the d-axis and q-axis divide the first rotor punching plate into four equal quadrants from the center of the axial hole, and in the first quadrant, the minimum distance from the geometric center of the divided rib to the d-axis is kd1, and the minimum distance to the q-axis is kq1, where kq1 = -ν*kd1 + λ, and 0.28 ≤ ν ≤ 0.46 and 28 ≤ λ ≤ 33.

[0050] The present invention further provides a self-starting synchronous reluctance motor including a stator and the motor rotor.

[0051] In some embodiments, after the rotor core and the corresponding stator core are assembled, the width of the air gap formed between the rotor core and the stator is σ, where 0 ≤ L < 8σ.

[0052] In some embodiments, 0 ≤ L ≤ 6σ.

[0053] In some embodiments,From the shaft hole side to the outer circle side of the rotor, each layer of the rotor groove Two second fillings in the groove The length of the curve between the nearest ends gradually decreases, and the adjacent rotor groove The rate of decrease in the length of the curve is 5% to 25%, and / or, the division is Bu Odor in the d-axis direction width There is an L2 such that L2 ≥ 0.5 * σ, where σ is the width of the air gap formed between the rotor core and the stator. ru.

[0054] The present invention further provides a compressor including the above-described self-starting synchronous reluctance motor. [Effects of the Invention]

[0055] In the motor rotor, self-starting synchronous reluctance motor, and compressor according to the present invention, the minimum distance between rotor filling grooves is limited, which reduces the saturation rate of the magnetic conduction channels between the filling grooves and also allows for a shift in the relative position between the magnetic conduction channels and the stator teeth. This contributes to reducing motor harmonics, torque ripple, harmonic losses, and improving motor efficiency and operational stability. [Brief explanation of the drawing]

[0056] [Figure 1] This is a schematic diagram of the axial structure of the first rotor punched plate of a motor rotor according to an embodiment of the present invention. [Figure 2] This is a schematic diagram of the axial structure of the second rotor punched plate of a motor rotor according to an embodiment of the present invention. [Figure 3] This is a schematic diagram of the axial structure of an electronic rotor according to an embodiment of the present invention. [Figure 4] This is a schematic diagram of the axial structure of the first rotor punched plate of a motor rotor according to another embodiment of the present invention. [Figure 5] This is a schematic diagram of the axial structure of the first rotor punched plate of a motor rotor according to yet another embodiment of the present invention. [Figure 6]This figure shows a comparison of the current waveforms of a motor using the technical solution of the present invention and a conventional motor. [Figure 7] This figure shows a comparison of the torque ripple of a motor using the technical solution of the present invention and a conventional motor. [Figure 8] This figure shows a comparison of the harmonic losses of a motor using the technical solution of the present invention and a conventional motor. [Figure 9] This figure shows a comparison of the efficiency of a motor using the technical solution of the present invention and a conventional motor. [Figure 10] This is a schematic diagram of the three-dimensional structure of a motor rotor according to an embodiment of the present invention. [Modes for carrying out the invention]

[0057] As shown in Figures 1 to 10, according to an embodiment of the present invention, a motor rotor is provided, which includes a rotor core, the rotor core includes a first rotor punched plate 1, and the first rotor punched plate 1 has filling grooves and rotor grooves 2. The filling grooves include a second filling groove 32 and a first filling groove 31. Multiple magnetic barrier layers are provided on the first rotor punched plate 1 at intervals along the q-axis, and the multiple magnetic barrier layers include two outer magnetic barrier layers and multiple inner magnetic barrier layers located between the two outer magnetic barrier layers, the outer magnetic barrier layers include the first filling groove 31, and the inner magnetic barrier layers include rotor grooves 2 and are located at both ends of rotor grooves 2. two It includes a second filling groove 32. In the inner magnetic barrier layer of the same layer, there is a divided rib 5 between the second filling groove 32 and the rotor groove 2, and the center point is in the axial plane where the side edge of the divided rib 5 that is closer to the outer circle of the rotor is located, and any two adjacent layers insideThe distance in the d-axis direction between the two center points corresponding to the two split ribs 5 in the magnetic barrier layer is L, and the maximum distance in the q-axis direction of the magnetic conduction channel formed between the filling grooves in the adjacent two magnetic barrier layers is W, and L satisfies 0≦L<2W. In one embodiment, 0≦L<W. In some embodiments, 0≦L≦0.8W. In the technical solution, the minimum distance between the rotor filling grooves is limited, which can reduce the saturation rate of the magnetic conduction channel between the filling grooves. At the same time, the relative position of the magnetic conduction channel and the teeth of the stator can also be shifted, which is helpful for reducing the harmonics of the motor, reducing the torque ripple, reducing the harmonic loss, and improving the efficiency and operating stability of the motor. FIGS. 6 to 9 show the comparison between the technology of the present invention and the prior art effects. From FIG. 6, it can be seen that the current waveform according to the technology of the present invention is closer to a sine wave compared with the prior art. From FIG. 7, it can be seen that the motor torque ripple using the technical solution of the present invention is significantly reduced. From FIG. 8, it can be seen that the current harmonic components according to the technology of the present invention are significantly reduced. From FIG. 9, it can be seen that in the technology of the present invention, the efficiency of the motor is improved at different torque points.

[0058] Note that the above center point is the geometric center point of the axial plane where the side closer to the outer circle of the rotor of the split rib 5 is located rotate Specifically, as shown in FIG. 1, the above plane is a rectangular plane extending in the axial direction of the first rotor punching plate 1 rotate The geometric center point of this rectangular plane, that is, the intersection point of the diagonals of the rectangular plane, when projected in the axial direction of the first rotor punching plate 1, is the midpoint of the length of the side closer to the outer circle of the rotor of the split rib 5.

[0059] In some embodiments, after assembling the rotor core and the corresponding stator core, the width of the air gap formed between the rotor core and the stator core is σ, where 0 ≤ L < 8σ. In some embodiments, 0 ≤ L ≤ 6σ. In such an installation, the segmented ribs 5 increase the mechanical strength of the rotor, reduce rotor deformation during manufacturing, alleviate process difficulties, limit the relative distance of the segmented ribs between each filling groove and rotor groove of the rotor, increase the pressure-receiving area between two adjacent magnetic barrier layers to achieve a mutually supportive effect, reduce rotor deformation during manufacturing, and alleviate process difficulties.

[0060] In some embodiments, adjacent to the first filling groove 31 outermost layer The width of the segmented rib 5 in the inner magnetic barrier layer in the d-axis direction is L1. The first rotor punched plate has an axial hole 4, and adjacent to the axial hole 4 is Innermost layer The width of the segmented rib 5 in the inner magnetic barrier layer in the d-axis direction is L2, L1 is greater than or equal to L2, and L1 ≥ 0.5 * σ. By limiting the minimum width of the segmented rib 5, the difficulty of machining can be reduced and the mechanical strength of the rotor can be increased, and L1 ≥ L2. inside By reducing magnetic flux leakage in the magnetic barrier layer, the efficiency of the motor can be improved.

[0061] In some embodiments, the sides of the segmented rib 5 corresponding to the adjacent second filling grooves 32 and / or rotor grooves 2 are parallel to or intersect the q-axis, meaning that the shape of the segmented rib 5 is not limited to a rectangle, trapezoid, or arc, and the shape of the segmented rib can be flexibly designed according to the direction of the magnetic field lines to reduce magnetic flux leakage from the motor.

[0062] In some embodiments, the center point of the segmented rib 5 is located in the axial plane where the side edge closest to the outer circle of the rotor is situated, and the outermost layer is closest to the outer circle of the rotor. inside The divided rib 5 of the magnetic barrier layer and adjacent to it Next inner layer The distance in the d-axis direction between the two center points corresponding to the divided ribs 5 of the magnetic barrier layer is k7, and the divided ribs 5 of the outermost magnetic barrier layer closer to the outer circle side of the rotor and the innermost layer closer to the shaft hole side of the rotor insideThe distance in the d-axis direction between the two center points corresponding to the segmented ribs 5 of the magnetic barrier layer is k8, where 0 ≤ k7 / k8 ≤ 0.6. In one embodiment, 0 ≤ k7 / k8 ≤ 0.4. In another embodiment, 0 ≤ k7 / k8 ≤ 0.2. By setting it in this way, the filling grooves of the outer layer support the rotor grooves 2 of the inner layer, thereby reducing rotor deformation during manufacturing.

[0063] The d-axis and q-axis divide the first rotor punched plate 1 into four equal quadrants from the center of the axial hole 4. In the first quadrant, for example, in the case of the first rotor punched plate 1 in the upper right corner region of Figure 4, the minimum distance from the geometric center of the divided rib 5 to the d-axis is kd1, and the minimum distance to the q-axis is kq1, where kq1 = -ν*kd1 + λ, and 0.28 ≤ ν ≤ 0.46. , nothing The dimensions are such that 28 ≤ λ ≤ 33, and the dimensions of λ coincide with kq1 and kd1, thereby limiting the position and width of the segmented ribs and further reducing the risk of rotor deformation.

[0064] In some embodiments, the filling grooves are located on the outer circumference of the rotor, in the innermost layer closest to the shaft bore. inside The distance between the second filling groove 32 of the magnetic barrier layer and the outer circle of the rotor is L3, and it is close to the outer circle side of the rotor. outside The distance between the first filling groove 31 of the magnetic barrier layer and the outer circle of the rotor is L4, where L4 ≥ L3 and 0 ≤ L3 ≤ 2.5σ. Since 0 ≤ L3 ≤ 2.5σ, the filling groove is either an open groove or a closed groove. If the filling groove is a closed groove, magnetic flux leakage can be reduced by limiting the maximum distance between it and the outer circle of the rotor, and L4 ≥ L3, inside This can reduce magnetic flux leakage in the magnetic barrier layer, inside This ensures the mechanical strength of the magnetic barrier layer.

[0065] In some embodiments, the maximum width in the q-axis direction of the filling groove at the end near the outer circle side of the rotor is less than or equal to the maximum width in the q-axis direction of the region of the filling groove near the rotor's q-axis. In some embodiments, the width of the filling groove in the q-axis direction is approximately the same from the outer circle side of the rotor to the rotor's q-axis, with a width deviation of 5% or less. By ensuring a width of the magnetic conduction channel close to the air gap between the rotor's magnetic barrier layers, the rotor's saturation rate is reduced, and the width of the filling groove in the q-axis direction is set to be approximately the same (i.e., 5% or less), the width of the magnetic conduction channel close to the air gap can be ensured, and the area of ​​the filling groove can be increased, which helps improve starting.

[0066] The ratio of the maximum width to the minimum width of the filling groove in the q-axis direction is τ, where 1 ≤ τ ≤ 2, and in some embodiments, 1.3 ≤ τ ≤ 1.5. Limiting this ratio prevents the filling groove thickness in the q-axis direction from being too thick, which would result in a narrower width of the magnetic conduction channel and further affect efficiency, while also preventing the filling groove thickness in the q-axis direction from being too thin, which would result in a narrower area of ​​the filling groove and further affect starting.

[0067] In some embodiments, along the direction from the outer circle of the q-axis rotor toward the center of the shaft hole 4, the maximum width of the second filling groove 32 in the d-axis direction in each inner magnetic barrier layer gradually increases, and in some embodiments, along the direction from the outer circle of the q-axis rotor toward the center of the shaft hole 4, the maximum width of each second filling groove 32 in the d-axis direction increases for at least three layers consecutively. In some embodiments, along the direction from the center of the q-axis shaft hole 4 toward the outer circle of the rotor, close to the d-axis Next inner layer Closer to the outer circle side of the rotor from the inner magnetic barrier layer inside Up to the magnetic barrier layer, the maximum width of each second filling groove 32 in the d-axis direction decreases continuously. By setting it in this way, it is possible to rationally utilize the rotor space, secure an appropriate area for the aluminum casting, and improve the motor's starting capability.

[0068] In some embodiments, the rotor groove 2 is composed of an arc portion and / or a straight portion, and the radius of curvature of the arc portion of the rotor groove 2 gradually increases in the direction from the center of the shaft hole toward the outer circle of the rotor, and the radius of curvature of the outer arc of the rotor groove in the same layer is greater than the radius of curvature of the inner arc, and the arc portion protrudes from the shaft hole toward the outer circle of the rotor. Alternatively, both ends of the rotor groove 2 extend toward the outer circle of the rotor in a direction parallel to the d axis to become a straight portion, and both ends of part or all of the rotor groove 2 are parallel to the d axis, and the rotor groove 2 In the q-axis direction The width gradually increases from the center of the rotor groove 2 to both ends. An axle hole 4 is drilled in the center of the rotor. This installation configuration increases the utilization rate of the rotor space, allows for a rational arrangement of the rotor grooves, increases the salient pole ratio of the rotor, and improves the reluctance torque of the motor.

[0069] Along the direction from the center of the q-axis shaft hole 4 toward the outer circle of the rotor, the width of the rotor groove 2 in the q-axis direction decreases continuously for at least three layers, the width of the rotor groove 2 in the q-axis direction is m2, the width of the first filling groove 31 in the q-axis direction is m1, the sum of the widths of all rotor grooves 2 and the first filling groove 31 in the q-axis direction is (m1 + Σm2), the width from the hole wall of the shaft hole 4 to the outer circle of the first rotor punched plate is m3, (m1 + Σm2) / m3 = 0.2 to 0.5, and preferably (m1 + Σm2) / m3 = 0.3 to 0.4. By selecting a reasonable ratio of magnetic barriers, it is possible not only to secure a sufficient width of magnetic barriers but also to secure a reasonable magnetic flux channel, thereby increasing the salient pole ratio of the motor and preventing oversaturation of the magnetic path.

[0070] In some embodiments, the length of the curve between the ends of each rotor groove 2 near the two second filling grooves 32 gradually decreases from the shaft bore side to the outer circle side of the rotor, with the rate of decrease of the curve length of adjacent rotor grooves 2 being 5% to 25%. The purpose of this setting is to improve motor performance by ensuring a constant proportion of the magnetic barrier layer while rationally utilizing the rotor space.

[0071] In some embodiments, the divided rib 5 is in the d-axis direction widthThe presence of L2, where L2 ≥ 0.5 * σ, and σ being the width of the air gap formed between the rotor core and the stator core, ensures the mechanical strength of the rotor structure.

[0072] In some embodiments, the filling grooves in the first rotor punching plate 1 (i.e., the first filling groove 31 and the second filling groove 32) have at least five types of filling grooves with different filling areas, and / or the total filling area of ​​the first filling groove 31 and the second filling groove 32 accounts for 30% to 70%, preferably 35% to 50%, of the total cross-sectional area of ​​the first filling groove 31, the second filling groove 32, and the rotor groove 2, thereby ensuring a constant proportion of the filling groove area and giving the motor the ability to start under a constant load.

[0073] The minimum width of the magnetic conduction channel between two adjacent filling grooves in two adjacent magnetic barrier layers is W1, W1 ≥ d, and d is the width of the two adjacent layers. inside This is the minimum width of the magnetic conduction channel between rotor grooves in the magnetic barrier layer, and in some embodiments, W1 / d > 1.15. Its purpose is to ensure sufficient width between the filling grooves and to avoid magnetic field saturation occurring, which would affect the magnetic flux flow in the channel between the magnetic barrier layers.

[0074] The minimum distance in the q-axis direction of the magnetic conduction channel between two adjacent rotor grooves 2 in two adjacent magnetic barrier layers is h1, where h1 ≥ 1.5h2, and h2 is equal to the distance between the two adjacent layers. inside Among the magnetic barrier layers, the width of the rotor groove 2 in the q-axis direction is small. inside This is the minimum width of the magnetic barrier layer in the q-axis direction. This setting reduces the difficulty of rotor manufacturing and ensures uniformity and desaturation of the rotor's magnetic flux density distribution.

[0075] In some embodiments, the width of the first filling groove 31 in the d-axis direction is such that the width of the adjacent grooves is innermost outer layerIt is smaller than the width in the d-axis direction between the ends of the two second filling grooves 32 in the magnetic barrier layer closer to the rotor groove 2. The purpose of this setting is to limit the width of the first filling groove 31 in the d-axis direction, thereby avoiding deformation of the rotor toward the shaft hole side or the outer circle side due to an overly large width.

[0076] In some embodiments, the ratio of the distance L5 from the inner wall of the first filling groove 31 to the center of the rotor to the radius Rr of the rotor in the q-axis direction satisfies 0.82 ≦ L5 / Rr ≦ 0.96. If L5 / Rr is too small, the outermost magnetic conduction channel becomes too narrow, increasing the losses of the motor and reducing the efficiency. If L5 / Rr is too large, the distance between the first filling groove 31 and the outer circle of the rotor becomes too small, increasing the processing difficulty. The innermost two Innermost layer The ratio of the distance in the q-axis direction of the side closer to the shaft hole side of the magnetic barrier layer to the width of the rotating shaft in the q-axis direction is greater than 1.2, so that the width of the magnetic conduction channel between the innermost inside magnetic barrier layer and the rotating shaft can be ensured, the magnetic flux density saturation rate of the rotor can be reduced, the mechanical strength of the part of the rotor close to the rotating shaft can be increased, and / or the diameter of the arc portion of the side closer to the shaft hole side of the innermost inside magnetic barrier layer to the width of the rotating shaft in the q-axis direction is greater than 2, so as to rationally utilize the space of the rotor to arrange the magnetic barrier layer.

[0077] In some embodiments, the maximum thickness of the first filling groove 31 in the q-axis direction is k, and the maximum thickness of the second filling groove 32 in the magnetic barrier layer adjacent to it in the q-axis direction is k1, and the minimum thickness of the magnetic conduction channel connected to it in the q-axis direction is k2. By 1 < k / k1 ≦ 2 and / or 0.8 < k / k2 ≦ 1.6, not only can the thickness of the first filling groove 31 in the q-axis direction be ensured to reduce the processing difficulty, but also the width of the outermost magnetic conduction channel can be ensured to improve the performance of the motor.

[0078] ​​A magnetic conduction channel is formed between two adjacent magnetic barrier layers, and the width of each magnetic conduction channel in the q-axis direction gradually decreases along the direction from the center of the q-axis bore 4 toward the outer circle of the rotor. More preferably, the width of each magnetic conduction channel in the q-axis direction decreases continuously for at least three layers along the direction from the center of the q-axis bore 4 toward the outer circle of the rotor. The closer the magnetic conduction channel is to the bore 4, the greater its interaction with the stator and the greater its impact on motor performance. This setting allows for rational use of rotor space while ensuring sufficient width for magnetic conduction channels close to the bore, thus contributing to improved motor performance.

[0079] A magnetic conduction channel is formed between two adjacent magnetic barrier layers. The width of the magnetic conduction channel (defined as the shortest distance from each point on one side of the magnetic conduction channel to the other side) gradually increases from the q-axis to both sides of the q-axis, with respect to the magnetic conduction channel consisting of arc-shaped and straight sections. The width of the magnetic conduction channel defined here is the cross-sectional width through which the magnetic field lines in the rotor pass. This setting helps to reduce the saturation rate of the magnetic flux density in the rotor and reduce motor losses.

[0080] In some embodiments, each layer inside In the magnetic barrier layer, the ratio of the width of the rotor groove 2 in the q-axis direction to the width of the end of the rotor groove 2 near the filling groove is τ1, and the innermost layer inside From the magnetic barrier layer to the outermost layer inside As τ1 gradually increases up to the magnetic barrier layer, inside This not only ensures the width of the magnetic conduction channels between the magnetic barrier layers, but also maintains a certain proportion of the magnetic barrier layer, thereby improving motor performance.

[0081] In some embodiments, each layer insideIn the magnetic barrier layer, the ratio of the maximum width of the filling groove in the q-axis direction to the width of the rotor groove 2 in the q-axis direction is τ2, where τ2 > 1.4. In some embodiments, 1.5 < τ2 < 3.0. By limiting this ratio, a constant width of the filling groove can be ensured, increasing its placement area, and by limiting the range of this ratio, the width of the magnetic conduction channels between the filling grooves can also be ensured.

[0082] Closer to the outer circle of the rotor Next outer layer inside In the magnetic barrier layer, the width in the d-axis direction between the ends of the two second filling grooves 32 located at both ends of the rotor groove 2 that are closer to the rotor groove 2 is k3, and adjacent to that, closer to the shaft hole side Next Inner layer inside In the magnetic barrier layer, the width in the d-axis direction between the ends of the two second filling grooves 32 located at both ends of the rotor groove 2 that are closest to the rotor groove 2 is k4, where 0.5 ≤ k3 / k4 ≤ 1 or 0.5 ≤ k4 / k3 ≤ 1. When rotor space is limited, this setting can increase the area of ​​the filling grooves and improve the motor's starting capability. The width in the d-axis direction between the ends of the two second filling grooves 31 located at both ends of the outermost rotor groove 2 that are closest to the rotor groove 2 is k5, and the width in the d-axis direction between the ends of the two second filling grooves 32 located at both ends of the innermost rotor groove 2 that are closest to the rotor groove 2 is k6, where 0.5 ≤ k5 / k6 ≤ 1 or 0.5 ≤ k6 / k5 ≤ 1. When rotor space is limited, this setting can increase the area of ​​the filling grooves and improve the motor's starting capability.

[0083] In some embodiments, the angle between the line connecting both ends of the first filling groove 31 and the center of the rotor is α1, where 20°≦α1≦60°. In some embodiments, 30°≦α1≦50°. In some embodiments, 30°≦α1≦35°, and this setting allows the filling groove to form a magnetic barrier layer, which can function as a magnetic barrier layer to increase the motor's reluctance torque, and can also function as a starting cage to improve the motor's starting performance.

[0084] The number of first filling grooves 31 is n, where n ≥ 1. There are no restrictions on whether the first filling grooves 31 are arranged throughout or in sections, or on the number of sections. This can be flexibly selected according to the requirements for rotor strength and the magnitude of rotor magnetic flux leakage. If it is necessary to reduce rotor magnetic flux leakage, the value of n is reduced. If it is necessary to increase rotor strength, the value of n is increased. And / or, the deviation of the parallelism between the longitudinal extension direction of the filling grooves and the d-axis is 5% or less. This allows the magnetic field lines of the rotor's d-axis to flow smoothly and minimizes the magnetic field lines of the q-axis, thereby increasing the salient pole difference of the motor and improving the motor's output and efficiency.

[0085] In some embodiments, the maximum width of the axial hole 4 of the first rotor punched plate in the q-axis direction is less than or equal to its maximum width in the d-axis direction, and rotor grooves 2 are provided in the q-axis direction. This configuration increases the utilization rate of the rotor space and allows for a rational arrangement of the rotor grooves 2, thereby increasing the salient pole ratio of the rotor and increasing the reluctance torque of the motor.

[0086] The shaft hole 4 is composed of an arc portion and / or a straight portion, and the shape of the shaft hole is not limited to circular, elliptical, substantially elliptical, or square, and the shape of the shaft hole can be flexibly set according to the arrangement of the rotor grooves.

[0087] In some embodiments, the rotor core further includes a second rotor punching plate 10, which is located between the end ring 12 and the first rotor punching plate 1, and the second rotor punching plate 10 is provided with a communication groove 11 corresponding to the filling groove (its function is the same as that of the filling groove).

[0088] In some embodiments, the maximum width of the outer contour of the second rotor punching plate 10 is less than or equal to the outer diameter of the first rotor punching plate 1, and the maximum width of the inner bore of the second rotor punching plate 10 in the q-axis direction is greater than or equal to its maximum width in the d-axis direction. Preferably, the ratio of the maximum width of the inner bore of the second rotor punching plate 10 in the q-axis direction to the maximum width in the d-axis direction is 1 to 1.5. The second rotor punching plate 10, as part of the rotor, needs to have an outer contour less than or equal to the outer circle of the first rotor punching plate 1 in order to form an air gap of a certain width between it and the stator. In the q-axis direction of its inner contour, a rotor groove of sufficient area is required to be in direct contact with the air relative to the rotor groove corresponding to the first rotor punching plate, forming a flow groove and increasing heat dissipation of the rotor.

[0089] Second rotor punching plate 10 rotate The axial thickness is greater than or equal to the thickness of one of the first rotor punched plates 1 to ensure the mechanical strength of the rotor.

[0090] In some embodiments, the radial width between the inner hole of the second rotor punching plate 10 and its outer circle is smallest in the q-axis direction, and the radial width kd2 in the d-axis direction and the radial width kq2 in the q-axis direction of the second rotor punching plate 10 satisfy 1.1 ≤ kd2 / kq2 ≤ 2.8, preferably 1.2 ≤ kd2 / kq2 ≤ 1.8, thereby ensuring that a sufficient rotor groove 2 is located within the inner hole of the second rotor punching plate 10 in the first rotor punching plate 1.

[0091] In some embodiments, the total cross-sectional area of ​​the communication groove 11 in the second rotor punching plate 10 is less than or equal to the total cross-sectional area of ​​the filling groove in the first rotor punching plate 1. The communication groove 11 in the second rotor punching plate 10 is an entrance for filling the filling groove in the first rotor punching plate 1 with material. By providing the communication groove in the second rotor punching plate 10, the filling material can enter the filling groove in the first rotor punching plate 1. By ensuring that the total cross-sectional area of ​​the communication groove 11 in the second rotor punching plate 10 is less than or equal to the total cross-sectional area of ​​the filling groove provided in the first rotor punching plate 1, the load-bearing area of ​​the unfilled groove portion of the first rotor punching plate can be reduced when filling with material, thereby ensuring mechanical strength during material filling and reducing the amount of deformation.

[0092] The connecting grooves 11 provided in the second rotor punching plate 10 are located in the same position as the filling grooves provided in the first rotor punching plate 1. The cross-sectional area of ​​a single connecting groove 11 in the second rotor punching plate 10 is less than or equal to the cross-sectional area of ​​a single filling groove in the first rotor punching plate 1 located in the same position, thereby reducing local deformation of the first rotor punching plate when filling with material.

[0093] In some embodiments, the width in the d-axis direction between the inner hole of the second rotor punching plate 10 and the communication groove 11 is greater than the width in the d-axis direction of the dividing rib 5 between the communication groove 11 and the corresponding rotor groove 2, thereby ensuring that the rotor groove 2 is not filled during rotor manufacturing.

[0094] In some embodiments, the total cross-sectional area of ​​the rotor grooves 2 located on the inner circumference side of the inner bore of the second rotor punching plate 10 in the first rotor punching plate 1 accounts for at least 20% of the total flow area of ​​the motor's flow grooves. In some embodiments, the total cross-sectional area of ​​the rotor grooves 2 located on the inner circumference side of the inner bore of the second rotor punching plate 10 in the first rotor punching plate 1 accounts for 25% to 40% of the total flow area of ​​the motor's flow grooves, and / or the total cross-sectional area of ​​the rotor grooves 2 located within the inner bore of the second rotor punching plate 10 in the first rotor punching plate 1 accounts for at least 30% of the total cross-sectional area of ​​the rotor grooves 2. In some embodiments, the total cross-sectional area of ​​the rotor grooves 2 located within the inner bore of the second rotor punching plate 10 in the first rotor punching plate 1 accounts for 45% to 65% of the total cross-sectional area of ​​the rotor grooves 2, ensuring that rotor grooves of sufficient area are in direct contact with the air to form flow grooves and increase heat dissipation of the rotor. The total flow area of ​​the motor's flow grooves includes the total flow area of ​​the motor's stator core's flow grooves and the total cross-sectional area of ​​the rotor grooves 2 that are not blocked by the second rotor punching plate 10 (i.e., the total cross-sectional area of ​​the rotor grooves 2 located within the inner bore of the second rotor punching plate 10).

[0095] In some embodiments, each layer of the first rotor punching plate 1 is located on the inner circumference side of the inner hole of the second rotor punching plate 10, along the direction from the center of the rotor's axial hole toward the outer circle of the rotor. inside The cross-sectional area of ​​the rotor groove 2 in the magnetic barrier layer gradually decreases. At this time, the correspondingly formed end ring 12 has a constant thickness in the q-axis direction in the magnetic barrier layer near the outer circle side of the rotor, ensuring a constant volume of the end ring 12 and improving the motor's starting capability.

[0096] In some embodiments, the maximum width of the outer contour of the end ring 12 is less than or equal to the maximum width of the outer contour of the second rotor punching plate 10, and the maximum distance from the center of the rotor shaft hole to the end face of the end ring 12 is greater than or equal to the maximum distance from the center of the rotor shaft hole to the end face of the second rotor punching plate 10. The maximum width of the outer contour of the end ring 12 being less than or equal to the maximum width of the outer contour of the second rotor punching plate 10 ensures that the first rotor punching plate, located on the outer circular side of the rotor and not covered by the second rotor punching plate 10, receives the force during material filling, thereby reducing local deformation. The maximum distance from the center of the rotor shaft hole 4 to the end face of the end ring 12 is greater than or equal to the maximum distance from the center of the rotor shaft hole 4 to the end face of the second rotor punching plate 10, thereby ensuring that the rotor has an end ring of a certain volume, which helps to improve the starting ability of the motor.

[0097] The radial width in the d-axis direction between the inner bore and outer circle of the end ring 12 is k9, and the radial width in the q-axis direction is k10, with 1.1 ≤ k9 / k10 ≤ 2.8, and in some embodiments, 1.2 ≤ k9 / k10 ≤ 1.8. The d-axis direction width of the end ring is large in the filling groove of the inner layer closer to the shaft bore side, and the radial width in the d-axis direction of the end ring is large in order to self-short-circuit the filling groove. However, the radial width in the d-axis direction of the end ring should not be too large in order to ensure an area of ​​direct contact with the air of the rotor groove. A balance block is attached to the end ring 12, and the balance block is located on the side of the end ring 12 where the radial width between the inner bore and outer circle is large.

[0098] A conductive nonmagnetic material is filled into at least some of the filling grooves, and a short circuit is achieved through the end rings 12 at both ends of the second rotor punching plate 1, forming a cage, the material of the end rings 12 being the same as the material filling the filling grooves. The self-short-circuiting cage structure provides asynchronous torque during the motor starting phase, enabling the motor to start on its own, reducing controller losses, and improving motor efficiency. The multi-layer magnetic barrier structure provides reluctance torque to the motor, enabling synchronous operation of the motor.

[0099] Note that the two adjacent layers inside The distance between the side edge of the divided rib 5 in the magnetic barrier layer that is closer to the outer circle of the rotor and the q-axis is not equal, that is, two adjacent layers inside The magnetic barrier layer, closer to the outer circle of the rotor. inside The distance between the side edge of the divided rib of the magnetic barrier layer that is closer to the outer circle of the rotor and the q-axis is between two adjacent layers. inside The magnetic barrier layer, closer to the rotor shaft hole. inside The distance between the side edge of the divided rib 5 of the magnetic barrier layer that is closer to the outer circle of the rotor and the q-axis is greater or less than the distance between the q-axis and h3 ≠ h4 in Figure 4, and in some embodiments h3 > h4, and in Figure 1, h3 <h4である。

[0100] The plane on which the side surface of the segmented rib 5 is located is either parallel to or intersects with the plane on which the q-axis is located. In other words, the shape of the segmented rib is not limited to a rectangle, trapezoid, or arc. In some embodiments, Figure 5 shows a situation where the plane on which some of the side surfaces of the segmented rib 5 are located intersects with the plane on which the q-axis is located, while Figure 1 shows a parallel situation.

[0101] The rotor structure of the motor according to the present invention can reduce the saturation rate of the magnetic conduction channels between the rotor filling grooves by limiting the minimum distance between the rotor filling grooves, and can also shift the relative position between the magnetic conduction channels and the teeth of the stator, which helps to reduce motor harmonics, torque ripple, harmonic losses, and improve the efficiency and operational stability of the motor. At the same time, the rotor can increase the pressure-receiving area between two adjacent magnetic barrier layers by limiting the relative distance between each filling groove and the dividing rib between the rotor grooves, thereby achieving a mutually supportive effect, which reduces rotor deformation during manufacturing and alleviates process difficulties.

[0102] To ensure understanding, the length, width, thickness, diameter, etc., of the rotor core structure in this invention may preferably be expressed in millimeters, but other appropriate units may be selected and used where reasonable.

[0103] The present invention provides a self-starting synchronous reluctance motor rotor that enables the motor to start automatically by asynchronous torque provided by the rotor bar (i.e., a member formed by filling grooves), solving the problem that synchronous reluctance motors need to be driven by an inverter, reducing motor losses, and improving motor efficiency. The motor rotor can reduce motor harmonics, reduce torque ripple, minimize harmonic losses, improve motor efficiency and operational stability, increase the mechanical strength of the rotor, reduce rotor deformation during manufacturing, and alleviate process difficulties.

[0104] According to embodiments of the present invention, a self-starting synchronous reluctance motor, in particular a self-starting synchronous reluctance two-pole motor, is provided, comprising the motor rotor described above, wherein the load inertia connected to the output end of the motor shaft is less than 60% of the system inertia of the motor's own rotating shaft.

[0105] According to embodiments of the present invention, a compressor including the above-described self-starting synchronous reluctance motor is further provided.

[0106] Those skilled in the art will readily understand that, as long as there is no contradiction, the above embodiments can be freely combined or superimposed.

[0107] The above are merely some embodiments of the present invention and do not limit the invention. Any modifications, equivalent substitutions, or improvements made without departing from the spirit and principles of the invention should be included within the scope of protection of the present invention. The above are merely some embodiments of the present invention, and it should be noted that those skilled in the art can make several improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. [Explanation of Symbols]

[0108] 1. First rotor punching plate 2. Rotor groove 31. First filling groove 32. Second filling groove 4. Shaft hole 5. Divided ribs 10. Second rotor punching plate 11, Communication groove 12. End ring

Claims

1. A motor rotor comprising a rotor core, the rotor core comprising a first rotor punched plate (1), the first rotor punched plate (1) having filling grooves and rotor grooves (2), the filling grooves comprising a second filling groove (32) and a first filling groove (31), the first rotor punched plate (1) having multiple layers of magnetic barrier layers spaced along the q-axis, the multiple layers of magnetic barrier layers comprising two outer magnetic barrier layers and multiple layers of inner magnetic barrier layers located between the two outer magnetic barrier layers, the outer magnetic barrier layers comprising the first filling groove (31), and the inner magnetic barrier layers comprising the rotor groove (2) and the rotor groove (2 The inner magnetic barrier layer of the same layer includes two second filling grooves (32) located at both ends of the rotor groove (2), and in the same layer, there is a dividing rib (5) between the second filling groove (32) and the rotor groove (2), the dividing rib (5) has a center point in the axial plane on the side of the dividing rib (5) that is closer to the outer circle of the rotor, the distance in the d-axis direction between the two center points corresponding to the two dividing ribs (5) in any two adjacent layers of the inner magnetic barrier layer is L, the maximum distance in the q-axis direction of the magnetic conduction channel formed between the filling grooves in the two adjacent layers of the inner magnetic barrier layer is W, and satisfies 0 ≤ L < 2W, The first rotor punching plate (1) has an axial hole (4), A motor rotor characterized in that a magnetic conduction channel is formed between two adjacent magnetic barrier layers, and the width of each magnetic conduction channel in the q-axis direction gradually decreases along the q-axis from the center of the axial hole (4) toward the outer circle of the rotor.

2. The motor rotor according to claim 1, characterized in that the total filling area of ​​the first filling groove (31) and the second filling groove (32) accounts for 30% to 70% of the total cross-sectional area of ​​the first filling groove (31), the second filling groove (32), and the rotor groove (2).

3. The motor rotor according to claim 1, characterized in that the distance in the d-axis direction between the two center points corresponding to the divided rib (5) of the outermost inner magnetic barrier layer closest to the outer circle side of the rotor and the divided rib (5) of the adjacent next outer inner magnetic barrier layer is k7, the distance in the d-axis direction between the two center points corresponding to the divided rib (5) of the outermost inner magnetic barrier layer closest to the outer circle side of the rotor and the divided rib (5) of the innermost inner magnetic barrier layer closest to the shaft hole (4) side of the rotor is k8, and 0 ≤ k7 / k8 ≤ 0.

6.

4. The motor rotor according to claim 1, characterized in that the maximum width of the second filling groove (32) in each inner magnetic barrier layer in the d-axis direction gradually increases along the direction from the outer circle of the rotor of the q-axis toward the center of the shaft hole (4).

5. The motor rotor according to claim 1, characterized in that the rotor groove (2) is composed of an arc portion and / or a straight portion, the radius of curvature of the arc portion of the rotor groove (2) gradually increases from the shaft hole side to the outer circle side of the rotor, and the radius of curvature of the outer arc of the rotor groove in the same layer is greater than the radius of curvature of the inner arc, the arc portion protrudes from the shaft hole in the direction of the outer circle of the rotor, or both ends of the rotor groove (2) extend toward the outer circle of the rotor in a direction parallel to the d axis to become a straight portion, both ends of a part or all of the rotor groove (2) are parallel to the d axis, and the width of the rotor groove (2) in the q axis direction gradually increases from the center position of the rotor groove (2) toward both ends.

6. The motor rotor according to claim 1, characterized in that the minimum width of the magnetic conduction channel between two adjacent filling grooves in two adjacent magnetic barrier layers is W1, W1 ≥ d, and d is the minimum width of the magnetic conduction channel between the rotor grooves in the two adjacent magnetic barrier layers.

7. The motor rotor according to claim 1, characterized in that, in the q-axis direction, the ratio of the distance L5 from the inner wall of the first filling groove (31) to the center of the rotor to the radius Rr of the rotor satisfies 0.82 ≤ L5 / Rr ≤ 0.96, and / or, the ratio of the distance in the q-axis direction of the side edge of the innermost two layers of inner magnetic barrier layers closest to the shaft hole to the width of the rotor's rotation axis in the q-axis direction is greater than 1.2, and / or, the ratio of the diameter of the arc portion of the side edge of the innermost layer of inner magnetic barrier layer closest to the shaft hole to the width of the rotation axis in the q-axis direction is greater than 2.

8. The motor rotor according to claim 1, characterized in that the angle between the line connecting both ends of the first filling groove (31) and the center of the rotor is α1, where 20° ≤ α1 ≤ 60°, and / or the deviation of the parallelism between the longitudinal extension direction of the filling groove and the d-axis is 5% or less.

9. The motor rotor according to claim 1, wherein the rotor core further includes a second rotor punched plate (10), the second rotor punched plate (10) is provided between an end ring (12) and the first rotor punched plate (1), and the second rotor punched plate (10) is provided with a communication groove (11) corresponding to the filling groove.

10. The motor rotor according to claim 9, characterized in that the maximum width of the outer contour of the end ring (12) is less than or equal to the maximum width of the outer contour of the second rotor punched plate (10), the maximum distance from the center of the shaft hole (4) of the rotor to the end face of the end ring (12) is greater than or equal to the maximum distance from the center of the shaft hole (4) of the rotor to the end face of the second rotor punched plate (10), and / or the radial width in the d-axis direction between the inner hole and the outer circle of the end ring (12) is k9, the radial width in the q-axis direction is k10, and 1.1 ≤ k9 / k10 ≤ 2.

8.

11. A self-starting synchronous reluctance motor, characterized in that it includes a stator and a motor rotor according to any one of claims 1 to 10.

12. The self-starting synchronous reluctance motor according to claim 11, characterized in that the width of the air gap formed between the rotor core and the stator is σ, and 0 ≤ L < 8σ.

13. The self-starting synchronous reluctance motor according to claim 11, characterized in that the width of the divided rib (5) in the d-axis direction in the outermost inner magnetic barrier layer adjacent to the first filling groove (31) is L1, the width of the divided rib (5) in the d-axis direction in the innermost inner magnetic barrier layer adjacent to the shaft hole (4) is L2, L1 is greater than or equal to L2, and L1 ≥ 0.5 * σ, where σ is the width of the air gap formed between the rotor core and the stator.

14. The self-starting synchronous reluctance motor according to claim 11, characterized in that the filling groove is located on the outer circumference of the rotor, the distance between the second filling groove (32) in the innermost magnetic barrier layer closest to the shaft bore and the outer circle of the rotor is L3, the distance between the first filling groove (31) in the outer magnetic barrier layer closest to the outer circle of the rotor and the outer circle of the rotor is L4, L4 ≥ L3 and 0 ≤ L3 ≤ 2.5σ, where the width of the air gap formed between the rotor core and the stator is σ, the outer magnetic barrier layer is the magnetic barrier layer located furthest from the shaft bore (4) in the q-axis direction, and / or the maximum width in the q-axis direction of the end of the filling groove closest to the outer circle of the rotor is less than or equal to the maximum width in the q-axis direction of the region of the filling groove close to the q-axis of the rotor.

15. A compressor, characterized in that it includes the self-starting synchronous reluctance motor described in claim 11.

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