Two-pole asynchronous starting synchronous reluctance motor rotor, two-pole motor and compressor

Abstract

The present invention provides a two-pole asynchronous start synchronous reluctance motor rotor, a two-pole motor and a compressor. The two-pole asynchronous start synchronous reluctance motor rotor includes a rotor core, the rotor core includes a first magnetic barrier structure, the first magnetic barrier structure also includes a plurality of supplementary slots, the extension direction of the supplementary slots is parallel to the q-axis, the first magnetic barrier structure also includes a plurality of first magnetic barrier parts, some of the first magnetic barrier parts are special-shaped slots, and each special-shaped slot includes a first straight slot segment, an arc slot segment and a second straight slot segment connected in sequence, a distance D1 is provided between two adjacent supplementary slots, a distance D2 is provided between two adjacent arc slot segments, D1≥D2 is satisfied, and a distance D6 is provided between two supplementary slots close to the q-axis, and D6>D1. The present invention effectively solves the problem of low working efficiency of the asynchronous start synchronous reluctance motor rotor of the motor in the prior art by optimizing the first magnetic barrier structure.

Description

[0001] This application is a divisional application of the patent application with patent application number "201811447558.9", application date November 29, 2018, and name "Asynchronous start synchronous reluctance motor rotor, motor and compressor", among which the priority application number of the patent application with application number "201811447558.9" is 201711372168.5, and the priority date is December 14, 2017. Technical Field

[0002] The present invention relates to the technical field of motors, and in particular to a two-pole asynchronous starting synchronous reluctance motor rotor, a two-pole motor and a compressor. Background Art

[0003] The asynchronous start synchronous reluctance motor combines the structural characteristics of the induction motor and the reluctance motor. It starts by generating torque through squirrel cage induction and generates reluctance torque through the rotor inductance difference to achieve constant speed operation of the motor, so that the motor can start and run directly by connecting to the power supply. Compared with the asynchronous start permanent magnet motor, the asynchronous start synchronous reluctance motor does not use rare earth permanent magnet materials and does not have the demagnetization problem. The motor has low cost and good reliability.

[0004] In the prior art, Figure 1 As shown, the patent with publication number CN 1255925C provides a cheap and easy-to-start synchronous induction motor and a manufacturing device and method for the synchronous induction motor, that is, a first slit portion 2' and a second slit portion 3' connected to the first slit portion 2' are arranged along the q-axis and d-axis directions of the rotor core 1'. The second slit portion 3' and the first slit portion 2' are filled with conductive material. The first slit portion 2' is in a straight line shape, and the second slit portion 3' is arranged radially at equal intervals along the circumferential direction of the rotor core 1'.

[0005] However, due to the above-mentioned structural setting of the second slit portion 3', the magnetic flux between the second slit portions 3' flows toward the surface perpendicular to the rotor core 1'. The second slit portion 3' hinders the flow of magnetic flux in the q-axis direction, especially the closer the second slit portion 1' is to the d-axis, the more obvious the magnetic flux obstruction of the q-axis is, and the d-axis magnetic flux flows more smoothly, so the difference between the magnetic flux of the d-axis and the q-axis is not obvious, the salient pole ratio is not large, and the motor output and efficiency are insufficient. Summary of the invention

[0006] The main purpose of the present invention is to provide a two-pole asynchronous starting synchronous reluctance motor rotor, a two-pole motor and a compressor to solve the problem of low working efficiency of the asynchronous starting synchronous reluctance motor rotor of the motor in the prior art.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided an asynchronous start synchronous reluctance motor, comprising a rotor core and a stator outside the rotor, wherein the rotor core comprises: a first magnetic barrier structure, the first magnetic barrier structure comprising a plurality of supplementary slots; a second magnetic barrier structure, the second magnetic barrier structure comprising a connected magnetic barrier slot and a plurality of independent magnetic barrier slots, there are two connected magnetic barrier slots, the two connected magnetic barrier slots are arranged at intervals along the d-axis of the rotor core, the two connected magnetic barrier slots are respectively located on the outer peripheral side of the d-axis of the rotor core, and the length of the connected magnetic barrier slot is greater than the length of at least one of the supplementary slots and the independent magnetic barrier slots.

[0008] Furthermore, the length of the connected magnetic barrier slot is A1, the length of the supplementary slot or the independent magnetic barrier slot is A2, and the ratio of A1 to A2 is greater than or equal to 2.

[0009] Furthermore, the connected magnetic barrier grooves include a plurality of magnetic barrier grooves.

[0010] Furthermore, the first magnetic barrier structure also includes multiple groups of first magnetic barrier parts, each of which is arranged at intervals along the d-axis of the rotor core; the first magnetic barrier structure also includes: multiple supplementary grooves, which are respectively located between the ends of the first magnetic barrier parts and the outer edges of the rotor core.

[0011] Furthermore, the two connected magnetic barrier grooves are respectively located on both sides of the first magnetic barrier structure, and the plurality of independent magnetic barrier grooves are respectively located on both sides of the q-axis, and the extension direction of the independent magnetic barrier grooves is parallel to the q-axis.

[0012] Further, two ends of part or all of the first magnetic barrier portions are parallel to the q-axis of the rotor core.

[0013] Furthermore, the plurality of groups of first magnetic barriers are one or more of straight grooves, second arc grooves or special-shaped grooves.

[0014] Further, the extension direction of the supplementary groove is parallel to the q-axis.

[0015] Furthermore, the rotor core has a central through hole for the rotating shaft to pass through, part of the first magnetic barrier portion is a special-shaped slot, and each special-shaped slot includes a first straight slot segment, an arc slot segment and a second straight slot segment connected in sequence, and the first straight slot segment and the second straight slot segment are both parallel to the q-axis, and the arc slot segment protrudes toward the side away from the central through hole.

[0016] Furthermore, part of the first magnetic barrier portion is a straight groove, the straight groove is arranged parallel to the q-axis, and the straight groove is located between the connecting magnetic barrier groove and the special-shaped groove.

[0017] Further, the independent magnetic barrier grooves are symmetrically arranged along the d-axis; and / or the independent magnetic barrier grooves are symmetrically arranged along the q-axis.

[0018] Furthermore, the rotor core has a central through hole for the shaft to pass through, and when part or all of the first magnetic barrier is a second arc-shaped groove, the second arc-shaped groove is arranged to avoid the central through hole, and the second arc-shaped groove protrudes toward a side away from the central through hole.

[0019] Further, the two connected magnetic barrier grooves are symmetrically arranged along the q axis; and / or the connected magnetic barrier grooves are symmetrically arranged along the d axis.

[0020] Further, the plurality of groups of first magnetic barriers are symmetrically arranged along the q-axis; and / or the first magnetic barriers are symmetrically arranged along the d-axis.

[0021] Furthermore, the first magnetic barrier structure and / or the second magnetic barrier structure is filled with conductive and non-magnetic materials.

[0022] Furthermore, both ends of the rotor core also include cast aluminum end rings, which connect all the magnetic barrier slots, supplementary slots and independent magnetic barrier slots to form a squirrel cage.

[0023] According to another aspect of the present invention, a two-pole motor is provided, comprising the above-mentioned asynchronous start synchronous reluctance motor rotor.

[0024] Furthermore, the motor also includes a stator arranged outside the asynchronous start synchronous reluctance motor rotor, and an air gap δ is provided between the stator core of the stator and the rotor core of the asynchronous start synchronous reluctance motor rotor. The independent magnetic barrier slots of the asynchronous start synchronous reluctance motor rotor, the supplementary slots of the asynchronous start synchronous reluctance motor rotor and the outer edge of the rotor core are both at a distance L1, satisfying 0.5δ≤L1<δ.

[0025] Furthermore, the motor also includes a stator arranged outside the asynchronous start synchronous reluctance motor rotor, an air gap δ is provided between the stator core of the stator and the rotor core of the asynchronous start synchronous reluctance motor rotor, and a distance L2 is provided between the supplementary slot of the asynchronous start synchronous reluctance motor rotor and the first magnetic barrier part of the asynchronous start synchronous reluctance motor rotor, satisfying 0.5δ≤L2<δ.

[0026] Furthermore, the motor also includes a stator arranged outside the asynchronous start synchronous reluctance motor rotor, an air gap δ is provided between the stator core of the stator and the rotor core of the asynchronous start synchronous reluctance motor rotor, and a distance L3 is provided between the connecting magnetic barrier slot and the outer edge of the rotor core, satisfying δ≤L3≤2δ.

[0027] Furthermore, the motor also includes a stator arranged outside the asynchronous start synchronous reluctance motor rotor, and the distance D6 between two supplementary slots close to the q-axis of the asynchronous start synchronous reluctance motor rotor is, and the tooth width K of the stator core of the stator and the distance D6 satisfy D6>K, and the distance between two adjacent supplementary slots is greater than the minimum distance between the corresponding two adjacent first magnetic barriers.

[0028] According to another aspect of the present invention, an asynchronous start synchronous reluctance motor rotor includes a rotor core, which includes: a first magnetic barrier structure, including multiple groups of first magnetic barrier parts, each first magnetic barrier part is arranged at intervals along the d-axis of the rotor core; a second magnetic barrier structure, including two connected magnetic barrier grooves arranged at intervals along the d-axis, the two connected magnetic barrier grooves are respectively located on both sides of the first magnetic barrier structure, the connected magnetic barrier groove is a first arc-shaped groove extending along the circumferential direction of the rotor core, and the groove walls at both ends of the first arc-shaped groove are arranged parallel to the q-axis.

[0029] Further, two ends of part or all of the first magnetic barrier portions are parallel to the q-axis of the rotor core.

[0030] Furthermore, the plurality of groups of first magnetic barriers are one or more of straight grooves, second arc grooves or special-shaped grooves.

[0031] Furthermore, the first magnetic barrier structure further includes: a plurality of supplementary slots, wherein the plurality of supplementary slots are respectively located between the end of the first magnetic barrier portion and the outer edge of the rotor core.

[0032] Further, the extension direction of the supplementary groove is parallel to the q-axis.

[0033] Furthermore, the rotor core has a central through hole for the rotating shaft to pass through, part of the first magnetic barrier portion is a special-shaped slot, and each special-shaped slot includes a first straight slot segment, an arc slot segment and a second straight slot segment connected in sequence, and the first straight slot segment and the second straight slot segment are both parallel to the q-axis, and the arc slot segment protrudes toward the side away from the central through hole.

[0034] Furthermore, part of the first magnetic barrier portion is a straight groove, the straight groove is arranged parallel to the q-axis, and the straight groove is located between the connecting magnetic barrier groove and the special-shaped groove.

[0035] Furthermore, the second magnetic barrier structure further includes:

[0036] Four independent magnetic barrier grooves are arranged in groups of two on both sides of the q-axis, and the extension direction of the independent magnetic barrier grooves is parallel to the q-axis.

[0037] Further, two independent magnetic barrier grooves in the same group are symmetrically arranged along the d axis; and / or independent magnetic barrier grooves in different groups are symmetrically arranged along the q axis.

[0038] Furthermore, there is a distance D1 between two adjacent supplementary grooves, and there is a distance D2 between two adjacent arc groove segments, satisfying D1≥D2.

[0039] Furthermore, the independent magnetic barrier slot and its two adjacent supplementary slots have distances D3 and D4 respectively, and along the d-axis direction, the straight slot and its adjacent arc slot segment have a distance D5, satisfying D3+D4≥D5.

[0040] Furthermore, there is a distance D6 between two supplementary grooves close to the q-axis, and there is a distance D7 between two first straight groove sections close to the q-axis, satisfying D6≥D7.

[0041] Furthermore, the distance D6, the distance D1, the distance D3 and the distance D4 satisfy D6>D1 and / or D6>D3 and / or D6>D4.

[0042] Furthermore, along the d-axis direction, there are distances D8 and D9 between the hole wall of the central through hole and two adjacent arc slot segments, respectively, satisfying D8+D9≥D6.

[0043] Furthermore, the sum of the widths of all connected magnetic barrier slots and all first magnetic barrier portions is M, and the distance m7 between the hole wall of the central through hole and the outer edge of the rotor core satisfies

[0044] Furthermore, the rotor core has a central through hole for the shaft to pass through, and when part or all of the first magnetic barrier is a second arc-shaped groove, the second arc-shaped groove is arranged to avoid the central through hole, and the second arc-shaped groove protrudes toward a side away from the central through hole.

[0045] Further, the two connected magnetic barrier grooves are symmetrically arranged along the q axis; and / or the connected magnetic barrier grooves are symmetrically arranged along the d axis.

[0046] Further, the plurality of groups of first magnetic barriers are symmetrically arranged along the q-axis; and / or the first magnetic barriers are symmetrically arranged along the d-axis.

[0047] Furthermore, the first magnetic barrier structure and / or the second magnetic barrier structure is filled with conductive and non-magnetic materials.

[0048] Furthermore, both ends of the rotor core also include cast aluminum end rings, which connect all the magnetic barrier slots, supplementary slots and independent magnetic barrier slots to form a squirrel cage.

[0049] Furthermore, the arc α of the connecting magnetic barrier groove satisfies 20 0 ≤α≤60 0 .

[0050] According to another aspect of the present invention, a motor is provided, characterized in that it comprises the above-mentioned asynchronous start synchronous reluctance motor rotor.

[0051] Furthermore, the motor also includes a stator arranged outside the asynchronous start synchronous reluctance motor rotor, and an air gap δ is provided between the stator core of the stator and the rotor core of the asynchronous start synchronous reluctance motor rotor. The independent magnetic barrier slots of the asynchronous start synchronous reluctance motor rotor, the supplementary slots of the asynchronous start synchronous reluctance motor rotor and the outer edge of the rotor core are both at a distance L1, satisfying 0.5δ≤L1<δ.

[0052] Furthermore, the motor also includes a stator arranged outside the asynchronous start synchronous reluctance motor rotor, an air gap δ is provided between the stator core of the stator and the rotor core of the asynchronous start synchronous reluctance motor rotor, and a distance L2 is provided between the supplementary slot of the asynchronous start synchronous reluctance motor rotor and the first magnetic barrier part of the asynchronous start synchronous reluctance motor rotor, satisfying 0.5δ≤L2<δ.

[0053] Furthermore, the motor also includes a stator arranged outside the asynchronous start synchronous reluctance motor rotor, an air gap δ is provided between the stator core of the stator and the rotor core of the asynchronous start synchronous reluctance motor rotor, and a distance L3 is provided between the connecting magnetic barrier slot and the outer edge of the rotor core, satisfying δ≤L3≤2δ.

[0054] Furthermore, the motor also includes a stator arranged outside the asynchronous start synchronous reluctance motor rotor, and the distance D6 is between two supplementary slots close to the q axis of the asynchronous start synchronous reluctance motor rotor, and the tooth width K of the stator core of the stator and the distance D6 satisfy D6>K.

[0055] According to another aspect of the present invention, a compressor is provided, comprising the above-mentioned motor.

[0056] By applying the technical solution of the present invention, the rotor of the asynchronous start synchronous reluctance motor comprises a rotor core, the rotor core comprises two connected magnetic barrier slots arranged at intervals along the d-axis, a plurality of supplementary slots and a plurality of independent magnetic barrier slots, the two connected magnetic barrier slots are respectively located on the outer peripheral side of the d-axis of the rotor core, and the length A1 of the connected magnetic barrier slot is greater than the length A2 of other supplementary slots or independent magnetic barrier slots. Such an arrangement can increase the magnetic flux in the q-axis direction of the asynchronous start synchronous reluctance motor rotor, so that the magnetic flux in the q-axis direction flows smoothly, and the magnetic flux in the d-axis direction is blocked, thereby increasing the difference between the magnetic flux in the d-axis direction and the q-axis direction of the asynchronous start synchronous reluctance motor rotor, improving the output power and working efficiency of the asynchronous start synchronous reluctance motor rotor, and at the same time, the connected magnetic barrier slots help to improve the motor starting ability.

[0057] The rotor core includes a first magnetic barrier structure and a second magnetic barrier structure. The first magnetic barrier structure includes a plurality of first magnetic barrier portions, each of which is arranged at intervals along the d-axis of the rotor core. The second magnetic barrier structure includes two connected magnetic barrier grooves arranged at intervals along the d-axis, the two connected magnetic barrier grooves are respectively located on both sides of the first magnetic barrier structure, and the connected magnetic barrier grooves are arc-shaped grooves extending along the circumferential direction of the rotor core. The first magnetic barrier portions are arranged at intervals along the d-axis of the rotor core and extend toward the q-axis.

[0058] During the operation of the asynchronous start synchronous reluctance motor rotor in the present application, the magnetic flux in the q-axis direction can flow between each first magnetic barrier part and between the first magnetic barrier part and the connected magnetic barrier slot, ensuring the smooth flow of magnetic flux in the q-axis direction, and the d-axis magnetic flux is blocked, thereby increasing the difference in magnetic flux between the d-axis direction and the q-axis direction, so that the asynchronous start synchronous reluctance motor rotor generates a larger reluctance torque, increasing the output and working efficiency of the motor. In addition, the asynchronous start synchronous reluctance motor rotor in this embodiment does not use magnets, does not have a demagnetization problem, improves the working reliability of the asynchronous start synchronous reluctance motor rotor, and has low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0060] Figure 1 A top view of a rotor of a motor in the prior art is shown;

[0061] Figure 2 A three-dimensional structural schematic diagram of a rotor of an asynchronous start synchronous reluctance motor according to a first embodiment of the present invention is shown;

[0062] Figure 3 Shows Figure 2 A top view of the asynchronous start synchronous reluctance motor rotor in FIG.

[0063] Figure 4 Shows Figure 3 A top view of the asynchronous start synchronous reluctance motor rotor after removing the cast aluminum end ring;

[0064] Figure 5 A top view of a first embodiment of a synchronous reluctance motor according to the present invention is shown;

[0065] Figure 6 A motor output torque comparison curve diagram of the synchronous reluctance motor in the present invention and the synchronous reluctance motor in the prior art is shown;

[0066] The above drawings include the following reference numerals:

[0067] 1', rotor core; 2', first slit portion; 3', second slit portion; 10, rotor core; 11, central through hole; 21, first magnetic barrier portion; 211, first straight slot segment; 212, arc slot segment; 213, second straight slot segment; 214, supplementary slot; 31, connected magnetic barrier slot; 32, independent magnetic barrier slot; 40, stator; 50, cast aluminum end ring. DETAILED DESCRIPTION

[0068] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0069] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0070] In the present invention, unless otherwise specified, the directional words used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0071] In order to solve the problem of low working efficiency of asynchronous start synchronous reluctance motor rotor of the motor in the prior art, the present application provides an asynchronous start synchronous reluctance motor rotor and a motor.

[0072] Embodiment 1

[0073] like Figures 2 to 4 As shown, the present invention provides an asynchronous start synchronous reluctance motor, including a rotor core 10 and a stator 40 outside the rotor. The rotor core 10 includes a first magnetic barrier structure and a second magnetic barrier structure. The first magnetic barrier structure includes a plurality of supplementary slots 214; the second magnetic barrier structure includes a connected magnetic barrier slot 31 and a plurality of independent magnetic barrier slots 32, and there are two connected magnetic barrier slots 31, and the two connected magnetic barrier slots 31 are arranged at intervals along the d-axis of the rotor core 10, and the two connected magnetic barrier slots 31 are respectively located on the outer peripheral side of the d-axis of the rotor core, and the length of the connected magnetic barrier slot 31 is greater than the length of at least one of the supplementary slots 214 and the independent magnetic barrier slots 32.

[0074] In this embodiment, such a setting can increase the magnetic flux in the q-axis direction of the asynchronous start synchronous reluctance motor rotor, so that the magnetic flux in the q-axis direction flows smoothly, and the magnetic flux in the d-axis direction is blocked, thereby increasing the difference between the magnetic flux in the d-axis direction and the q-axis direction of the asynchronous start synchronous reluctance motor rotor, improving the output power and working efficiency of the asynchronous start synchronous reluctance motor rotor, and at the same time, the connected magnetic barrier slots help to improve the motor starting ability. Among them, the length of each connected magnetic barrier slot 31 can be set to be greater than the length of all the supplementary slots 214, and the length of each connected magnetic barrier slot 31 can be set to be greater than the length of all the independent magnetic barrier slots 32. It is also possible to set the length of only one of the connected magnetic barrier slots 31 to be greater than the length of all the supplementary slots 214 and all the independent magnetic barrier slots 32.

[0075] The length of the connected magnetic barrier slot 31 is A1, the length of the supplementary slot 214 or the independent magnetic barrier slot 32 is A2, and the ratio of A1 to A2 is greater than or equal to 2. The connected magnetic barrier slot 31 includes a plurality of magnetic barrier slots, that is, the length A1 of the connected magnetic barrier slot 31 is more than 2 times greater than the length A2 of other supplementary slots or independent magnetic barrier slots. The connected magnetic barrier slot 31 can be divided into a plurality of small magnetic barrier slots.

[0076] The rotor core 10 includes: a first magnetic barrier structure, including a plurality of first magnetic barrier portions 21, each of which is arranged at intervals along the d-axis of the rotor core 10; the first magnetic barrier structure also includes: a plurality of supplementary slots 214, each of which is located between the end of the first magnetic barrier portion 21 and the outer edge of the rotor core 10. The second magnetic barrier structure includes two connected magnetic barrier slots 31 arranged at intervals along the d-axis, and the two connected magnetic barrier slots 31 are respectively located on both sides of the first magnetic barrier structure. The second magnetic barrier structure also includes: a plurality of independent magnetic barrier slots 32, each of which is located on both sides of the q-axis, and the extension direction of the independent magnetic barrier slots 32 is parallel to the q-axis.

[0077] During the operation of the asynchronous start synchronous reluctance motor rotor in this embodiment, the magnetic flux in the q-axis direction can flow between each first magnetic barrier portion 21 and between the first magnetic barrier portion 21 and the connected magnetic barrier slot 31, ensuring smooth flow of magnetic flux in the q-axis direction, blocking the d-axis magnetic flux, thereby increasing the difference in magnetic flux between the d-axis direction and the q-axis direction, so that the asynchronous start synchronous reluctance motor rotor generates a greater reluctance torque, increasing the output and working efficiency of the motor. In addition, the asynchronous start synchronous reluctance motor rotor in this embodiment does not use magnets, does not have a demagnetization problem, improves the working reliability of the asynchronous start synchronous reluctance motor rotor, and has low cost.

[0078] In this embodiment, the obstruction to the magnetic flux in the q-axis direction of the asynchronous start synchronous reluctance motor rotor in the prior art is reduced, thereby increasing the difference between the d-axis and q-axis magnetic fluxes, thereby improving the motor output power and efficiency.

[0079] In this embodiment, the connected magnetic barrier slots 31 on the outermost layer of the rotor core 10 further increase the magnetic resistance in the d-axis direction, reduce the d-axis magnetic flux, and can also be used as a starting cage to improve the starting performance of the motor.

[0080] like Figure 3 to Figure 4As shown, both ends of part or all of the first magnetic barrier 21 are parallel to the q-axis of the rotor core 10. Part of the first magnetic barrier 21 is a straight groove, and part of the first magnetic barrier 21 is a special-shaped groove. In this way, different first magnetic barriers 21 are designed for different asynchronous start synchronous reluctance motor rotor size specifications, thereby improving the utilization rate of the rotor core 10, increasing the magnetic flux in the q-axis direction of the asynchronous start synchronous reluctance motor rotor, blocking the magnetic flux in the d-axis direction of the asynchronous start synchronous reluctance motor rotor, thereby increasing the difference between the two, and improving the working performance of the asynchronous start synchronous reluctance motor rotor.

[0081] like Figure 4 As shown, a plurality of supplementary slots 214 are respectively located between the end of the first magnetic barrier portion 21 and the outer edge of the rotor core 10. The supplementary slots 214 filled with conductive material can generate an induced torque to realize the starting of the asynchronous start synchronous reluctance motor rotor and drag it into synchronization. Moreover, the reasonable distribution of the supplementary slots 214 and the first magnetic barrier portion 21 enables the asynchronous start synchronous reluctance motor rotor to have good starting and operating performance.

[0082] Specifically, the supplementary slot 214 is on the periphery of the rotor core 10 to achieve asynchronous starting. Furthermore, the extension direction of the supplementary slot 214 is parallel to the q-axis, that is, the upper and lower walls of the supplementary slot 214 are parallel to the q-axis, and the supplementary slot 214 reduces the d-axis magnetic flux and increases the q-axis magnetic flux. In this way, the first magnetic barrier 21 is inside the rotor core 10, and the first magnetic barrier 21 and its two adjacent supplementary slots 214 form a magnetic flux barrier in the d-axis direction and a magnetic flux channel in the q-axis direction, thereby making most of the magnetic flux flow along the q-axis direction, hindering the flow of magnetic flux in the d-axis direction, increasing the magnetic flux difference in the two directions, and improving the working efficiency and output of the asynchronous starting synchronous reluctance motor rotor.

[0083] like Figure 4 As shown, the above arrangement makes the magnetic flux flowing through the supplementary slot 214 flow in a direction parallel to the q-axis, and the magnetic flux in the d-axis direction of the asynchronous starting synchronous reluctance motor rotor is blocked, thereby increasing the magnetic flux in the q-axis direction of the asynchronous starting synchronous reluctance motor rotor, and then increasing the difference between the magnetic flux in the d-axis direction and the q-axis direction, so that a larger reluctance torque is generated on the asynchronous starting synchronous reluctance motor rotor, thereby improving the working efficiency of the asynchronous starting synchronous reluctance motor rotor.

[0084] like Figure 4 As shown, the rotor core 10 has a central through hole 11 for the rotating shaft to pass through, a portion of the first magnetic barrier portion 21 is a special-shaped slot, and each special-shaped slot includes a first straight slot segment 211, an arc slot segment 212 and a second straight slot segment 213 connected in sequence, and the first straight slot segment 211 and the second straight slot segment 213 are both parallel to the q-axis, and the arc slot segment 212 protrudes toward the side away from the central through hole 11.

[0085] Specifically, during the operation of the asynchronous start synchronous reluctance motor rotor, the magnetic flux passes through a supplementary slot 214, a first straight slot segment 211, an arc slot segment 212, a second straight slot segment 213 and another supplementary slot 214 in sequence, thereby allowing the magnetic flux in the q-axis direction to flow smoothly, while the magnetic flux in the d-axis direction is blocked, thereby increasing the difference in magnetic flux in the d- and q-axis directions, generating a greater reluctance torque, and increasing the output and working efficiency of the motor.

[0086] like Figure 4 As shown, the straight slot is arranged parallel to the q-axis, and the straight slot is located between the connected magnetic barrier slot 31 and the special-shaped slot. Specifically, there are two groups of straight slots, and the two groups of straight slots are symmetrically arranged along the q-axis. The multiple independent magnetic barrier slots 32 are arranged in pairs on both sides of the q-axis, and the two independent magnetic barrier slots 32 in the same group are arranged at intervals from each other, and the connecting line between the two is parallel to the q-axis, and the independent magnetic barrier slot 32 is located between the straight slot and the special-shaped slot. Specifically, during the operation of the asynchronous starting synchronous reluctance motor rotor, the independent magnetic barrier slot 32 does not cooperate with the first magnetic barrier part 21, and the magnetic flux lines enter the rotor core 10 from the upper and lower sides of the independent magnetic barrier slot 32, and then flow along the channel between the straight slot and the special-shaped slot to ensure the flow of magnetic flux in the q-axis direction. In addition, the multiple independent magnetic barrier slots are filled with conductive and non-magnetic materials as a starting cage to increase the starting capacity of the motor.

[0087] like Figure 4 As shown, the two independent magnetic barrier slots 32 in the same group are symmetrically arranged along the d axis, and the independent magnetic barrier slots 32 in different groups are symmetrically arranged along the q axis. The above arrangement enables the magnetic flux barriers on the rotor core 10 to be symmetrically arranged, and then the magnetic flux is symmetrically arranged, which makes the force on the asynchronous start synchronous reluctance motor rotor more uniform, ensures the stable operation of the asynchronous start synchronous reluctance motor rotor, reduces the vibration and noise generated during the operation of the asynchronous start synchronous reluctance motor rotor, and improves the user experience.

[0088] like Figure 4 As shown, the two connected magnetic barrier grooves 31 are symmetrically arranged along the q axis, and the connected magnetic barrier grooves 31 are symmetrically arranged along the d axis.

[0089] like Figure 3 to Figure 4 As shown, multiple groups of first magnetic barriers 21 are symmetrically arranged along the q axis, and each first magnetic barrier 21 is symmetrically arranged along the d axis. In this way, the above arrangement makes the magnetic barriers in the rotor core 10 continuous and diverse in shape, thereby making the flow of magnetic flux continuous and diverse, thereby making the force on the asynchronous start synchronous reluctance motor rotor more uniform, and improving the operating stability of the asynchronous start synchronous reluctance motor rotor.

[0090] In this embodiment, the supplementary slot 214 and the second magnetic barrier structure are filled with conductive non-magnetic material. Optionally, the conductive non-magnetic material is made of aluminum. In this way, the above arrangement can ensure the normal starting of the asynchronous start synchronous reluctance motor rotor.

[0091] Specifically, aluminum material is filled into the corresponding slots on the rotor core 10 to form cast aluminum, so as to form the first magnetic barrier portion 21, the connecting magnetic barrier slot 31, the supplementary slot 214 and the independent magnetic barrier slot 32. The purpose is to generate an induced current when the motor starts, which reacts with the stator current to generate an induced torque to start the motor and rotate.

[0092] It should be noted that the material of the conductive and non-magnetic material is not limited thereto, and may also be other types of materials.

[0093] In this embodiment, through reasonable design of magnetic barriers and cast aluminum slots, it is necessary to ensure a reasonable design of magnetic barrier proportions and to ensure that the magnetic flux channels between the magnetic barriers are not oversaturated to hinder the flow of magnetic flux, effectively utilize the rotor space of the asynchronous starting synchronous reluctance motor, and maximize the difference in d- and q-axis magnetic fluxes.

[0094] like Figure 2 and Figure 3 As shown, the asynchronous start synchronous reluctance motor rotor also includes cast aluminum end rings 50. The cast aluminum end rings 50 are located at both ends of the rotor core 10, and all the connected magnetic barrier slots 31, the supplementary slots 214 and the independent magnetic barrier slots 32 are connected through the cast aluminum end rings 50 to form a squirrel cage.

[0095] In this embodiment, the rotor core 10 is formed by axially stacking silicon steel sheets.

[0096] like Figure 5 As shown, the present application also provides a synchronous reluctance motor, including the above-mentioned asynchronous starting synchronous reluctance motor rotor. In this embodiment, the synchronous reluctance motor can achieve asynchronous starting and synchronous operation, and the magnetic flux difference between the motor d-axis direction and the q-axis direction is increased by the first magnetic barrier structure and the second magnetic barrier structure, and the salient pole ratio of the motor is increased, so as to solve the problems of low efficiency and low speed of the asynchronous motor and achieve efficient constant speed operation. In addition, the synchronous reluctance motor in this embodiment also solves the reliability problems of high cost and magnet demagnetization of permanent magnet synchronous motors. The synchronous reluctance motor does not use rare earth magnets and drive controllers, and has the characteristics of low cost and good reliability.

[0097] Specifically, when the synchronous reluctance motor starts, an induced current is generated in the squirrel cage, and the induced current acts on the stator 40 current to generate an induced torque, so that the synchronous reluctance motor starts, rotates and enters synchronous operation.

[0098] like Figure 4As shown, the synchronous reluctance motor also includes a stator 40 arranged outside the asynchronous start synchronous reluctance motor rotor, and there is a distance δ between the stator core of the stator 40 and the rotor core 10 of the asynchronous start synchronous reluctance motor rotor, and there is a distance L1 between the independent magnetic barrier slot 32 of the asynchronous start synchronous reluctance motor rotor, the supplementary slot 214 of the asynchronous start synchronous reluctance motor rotor and the outer edge of the rotor core 10, which satisfies 0.5δ≤L1<δ. Among them, the distance δ is the air gap width between the stator core and the rotor core 10. In this way, the above distance setting can reduce the leakage magnetic flux (leakage magnetic flux) between the supplementary slot 214 of the asynchronous start synchronous reluctance motor rotor and the outer edge of the rotor core 10, increase the magnetic flux of the magnetic flux channel, and help the motor output.

[0099] like Figure 4 and Figure 5 As shown, the synchronous reluctance motor further includes a stator 40 disposed outside the asynchronous start synchronous reluctance motor rotor, a distance δ is provided between the stator core of the stator 40 and the rotor core 10 of the asynchronous start synchronous reluctance motor rotor, a distance L2 is provided between the supplementary slot 214 of the asynchronous start synchronous reluctance motor rotor and the first magnetic barrier 21 of the asynchronous start synchronous reluctance motor rotor, and 0.5δ≤L2<δ is satisfied. In this way, the above distance setting can reduce the leakage magnetic flux (leakage magnetic flux) between the supplementary slot 214 of the asynchronous start synchronous reluctance motor rotor and the first magnetic barrier 21 of the asynchronous start synchronous reluctance motor rotor, increase the magnetic flux of the magnetic flux channel, and contribute to the motor output.

[0100] like Figure 4 and Figure 5 As shown, the synchronous reluctance motor further includes a stator 40 disposed outside the asynchronous start synchronous reluctance motor rotor, a distance δ is provided between the stator core of the stator 40 and the rotor core 10 of the asynchronous start synchronous reluctance motor rotor, a distance L3 is provided between the connecting magnetic barrier slot 31 and the outer edge of the rotor core 10, and δ≤L3≤2δ is satisfied. In this way, the above distance setting can ensure the structural strength of the asynchronous start synchronous reluctance motor rotor, extend the service life of the asynchronous start synchronous reluctance motor rotor, and ensure the normal operation of the synchronous reluctance motor.

[0101] like Figure 4 and Figure 5 As shown, the synchronous reluctance motor further includes a stator 40 disposed outside the asynchronous start synchronous reluctance motor rotor, and the two supplementary slots 214 of the asynchronous start synchronous reluctance motor rotor close to the q-axis have a distance D6 between them, and the tooth width K of the stator core of the stator 40 and the distance D6 satisfy D6>K. The distance between two adjacent supplementary slots 214 is greater than the minimum distance between two corresponding adjacent first magnetic barriers 21. Specifically, as Figure 4As shown, the distance D6, the distance D1, the distance D3 and the distance D4 satisfy D6>D1, D6>D3, and D6>D4. The distance D7 between the two first straight slot sections 211 close to the q-axis satisfies D6≥D7. In this way, the above arrangement makes the q-axis magnetic flux more concentrated on the q-axis, and generates an effective torque with the stator to increase the motor output, while also preventing D6 from being severely saturated.

[0102] like Figure 6 As shown, under the same stator scheme and current, the output of the synchronous reluctance motor in this embodiment is about 10% higher than that of the prior art solution, the motor output is increased, and the motor efficiency is improved.

[0103] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0104] The first magnetic barrier is arranged at intervals along the d-axis of the rotor core and extends toward the q-axis. The slot walls connecting the two ends of the magnetic barrier slot are arranged parallel to the q-axis, thereby increasing the magnetic flux in the q-axis direction of the asynchronous start synchronous reluctance motor rotor, allowing the magnetic flux in the q-axis direction to flow smoothly and blocking the magnetic flux in the d-axis direction, thereby increasing the difference in the magnetic flux in the d-axis direction and the q-axis direction of the asynchronous start synchronous reluctance motor rotor, thereby improving the output power and working efficiency of the asynchronous start synchronous reluctance motor rotor.

[0105] During the operation of the asynchronous start synchronous reluctance motor rotor in the present application, the magnetic flux in the q-axis direction can flow between each first magnetic barrier part and between the first magnetic barrier part and the connected magnetic barrier slot, ensuring the smooth flow of magnetic flux in the q-axis direction, and the d-axis magnetic flux is blocked, thereby increasing the difference in magnetic flux in the d-axis direction and the q-axis direction, so that the asynchronous start synchronous reluctance motor rotor produces a larger reluctance torque, increasing the output and working efficiency of the motor. In addition, the asynchronous start synchronous reluctance motor rotor in the present application does not use rare earth magnets, thereby reducing the cost of the asynchronous start synchronous reluctance motor and improving the working reliability of the asynchronous start synchronous reluctance motor rotor.

[0106] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0107] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0108] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0109] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A two-pole asynchronous start synchronous reluctance motor rotor, comprising a rotor core (10), characterized in that: The rotor core (10) comprises: A first magnetic barrier structure, wherein the first magnetic barrier structure further comprises a plurality of supplementary slots (214), wherein the extension direction of the supplementary slots (214) is parallel to the q-axis, and the first magnetic barrier structure further comprises a plurality of first magnetic barrier portions (21), wherein some of the first magnetic barrier portions (21) are irregularly shaped slots, and each irregularly shaped slot comprises a first straight slot segment (211), an arc slot segment (212), and a second straight slot segment (213) connected in sequence, wherein a distance D1 is provided between two adjacent supplementary slots (214), a distance D2 is provided between two adjacent arc slot segments (212), and D1≥D2 is satisfied, and a distance D6 is provided between two supplementary slots (214) close to the q-axis, and D6>D1; The first magnetic barriers (21) are arranged at intervals along the d-axis of the rotor core (10), and the rotor core (10) further comprises: The second magnetic barrier structure comprises two connected magnetic barrier grooves (31) arranged at intervals along the d-axis, the two connected magnetic barrier grooves (31) are respectively located on both sides of the first magnetic barrier structure, the connected magnetic barrier grooves (31) are first arc-shaped grooves extending along the circumferential direction of the rotor core (10), and the groove walls at both ends of the first arc-shaped groove are arranged parallel to the q-axis.

2. The two-pole asynchronous start synchronous reluctance motor rotor according to claim 1, characterized in that: Both ends of part or all of the first magnetic barrier (21) are parallel to the q-axis of the rotor core (10).

3. The two-pole asynchronous start synchronous reluctance motor rotor according to claim 2, characterized in that: The plurality of supplementary grooves (214) are respectively located between the end of the first magnetic barrier portion (21) and the outer edge of the rotor core (10).

4. The two-pole asynchronous start synchronous reluctance motor rotor according to claim 3, characterized in that: The rotor core (10) has a central through hole (11) for a rotating shaft to pass through, and the first straight slot section (211) and the second straight slot section (213) are both parallel to the q-axis, and the arc slot section (212) protrudes toward a side away from the central through hole (11).

5. The two-pole asynchronous start synchronous reluctance motor rotor according to claim 4, characterized in that: Part of the first magnetic barrier portion (21) is a linear groove, the linear groove is arranged parallel to the q-axis, and the linear groove is located between the connecting magnetic barrier groove (31) and the special-shaped groove.

6. The two-pole asynchronous start synchronous reluctance motor rotor according to claim 5, characterized in that: The second magnetic barrier structure further includes: Four independent magnetic barrier grooves (32), the four independent magnetic barrier grooves (32) are arranged in groups of two on both sides of the q-axis, and the extension direction of the independent magnetic barrier grooves (32) is parallel to the q-axis.

7. The two-pole asynchronous start synchronous reluctance motor rotor according to claim 6, characterized in that: The two independent magnetic barrier grooves (32) in the same group are symmetrically arranged along the d axis; and / or Different groups of independent magnetic barrier grooves (32) are symmetrically arranged along the q axis.

8. The two-pole asynchronous start synchronous reluctance motor rotor according to claim 6, characterized in that: There are distances D3 and D4 between the independent magnetic barrier slot (32) and the two adjacent supplementary slots (214), respectively. Along the d-axis direction, there is a distance D5 between the straight slot and the adjacent arc slot segment (212), satisfying D3+D4≥D5.

9. The two-pole asynchronous start synchronous reluctance motor rotor according to claim 8, characterized in that: There is a distance D7 between two of the first straight groove sections (211) close to the q-axis, satisfying D6≥D7.

10. The two-pole asynchronous start synchronous reluctance motor rotor according to claim 9, characterized in that: The distance D6, the distance D3 and the distance D4 satisfy D6>D3 and / or D6>D4.

11. The two-pole asynchronous start synchronous reluctance motor rotor according to claim 9, characterized in that: Along the d-axis direction, there are distances D8 and D9 between the hole wall of the central through hole (11) and two adjacent arc slot segments (212), respectively, satisfying D8+D9≥D6.

12. The two-pole asynchronous start synchronous reluctance motor rotor according to claim 4, characterized in that: The sum of the widths of all the connecting magnetic barrier slots (31) and all the first magnetic barrier portions (21) is M, and the distance m7 between the hole wall of the central through hole (11) and the outer edge of the rotor core (10) satisfies 13. The two-pole asynchronous start synchronous reluctance motor rotor according to claim 2, characterized in that: The rotor core (10) has a central through hole (11) for the rotation shaft to pass through, and when part or all of the first magnetic barrier (21) is a second arc-shaped groove, the second arc-shaped groove is arranged to avoid the central through hole (11), and the second arc-shaped groove protrudes toward a side away from the central through hole (11).

14. The two-pole asynchronous start synchronous reluctance motor rotor according to claim 1, characterized in that: The two connected magnetic barrier grooves (31) are symmetrically arranged along the q axis; and / or The communicating magnetic barrier grooves (31) are symmetrically arranged along the d-axis.

15. The two-pole asynchronous start synchronous reluctance motor rotor according to claim 1, characterized in that: A plurality of groups of the first magnetic barriers (21) are symmetrically arranged along the q axis; and / or Each of the first magnetic barriers (21) is symmetrically arranged along the d-axis.

16. The two-pole asynchronous start synchronous reluctance motor rotor according to claim 1, characterized in that: The first magnetic barrier structure and / or the second magnetic barrier structure are filled with conductive and non-magnetic conductive materials.

17. The two-pole asynchronous start synchronous reluctance motor rotor according to claim 6, characterized in that: The rotor core (10) further comprises a second magnetic barrier structure comprising two interconnected magnetic barrier slots (31) spaced apart along the d-axis, and both ends of the rotor core (10) further comprise cast aluminum end rings (50), wherein the cast aluminum end rings (50) connect all of the interconnected magnetic barrier slots (31), the supplementary slots (214) and the independent magnetic barrier slots (32) to form a squirrel cage.

18. The two-pole asynchronous start synchronous reluctance motor rotor according to claim 1, characterized in that: The arc angle α of the connecting magnetic barrier groove (31) satisfies 20°≤α≤60°.

19. A two-pole motor, characterized in that: A two-pole asynchronous start synchronous reluctance motor rotor comprising any one of claims 1 to 18.

20. The electric machine according to claim 19, characterized in that The motor further comprises a stator (40) arranged outside the two-pole asynchronous start synchronous reluctance motor rotor, an air gap δ is provided between the stator core of the stator (40) and the rotor core (10) of the two-pole asynchronous start synchronous reluctance motor rotor, and a distance L1 is provided between the independent magnetic barrier slot (32) of the two-pole asynchronous start synchronous reluctance motor rotor and the supplementary slot (214) of the two-pole asynchronous start synchronous reluctance motor rotor and the outer edge of the rotor core (10), satisfying 0.5δ≤L1<δ.

21. The electric machine according to claim 19, characterized in that The motor further comprises a stator (40) arranged outside the two-pole asynchronous start synchronous reluctance motor rotor, an air gap δ is provided between the stator core of the stator (40) and the rotor core (10) of the two-pole asynchronous start synchronous reluctance motor rotor, and a distance L2 is provided between the supplementary slot (214) of the two-pole asynchronous start synchronous reluctance motor rotor and the first magnetic barrier (21) of the two-pole asynchronous start synchronous reluctance motor rotor, satisfying 0.5δ≤L2<δ.

22. The electric machine according to claim 19, characterized in that The motor further comprises a stator (40) arranged outside the two-pole asynchronous starting synchronous reluctance motor rotor, an air gap δ is provided between the stator core of the stator (40) and the rotor core (10) of the two-pole asynchronous starting synchronous reluctance motor rotor, and a distance L3 is provided between the connecting magnetic barrier slot (31) and the outer edge of the rotor core (10), satisfying δ≤L3≤2δ.

23. The electric machine according to claim 19, characterized in that The motor further comprises a stator (40) arranged outside the two-pole asynchronous starting synchronous reluctance motor rotor, a distance D6 is provided between two supplementary slots (214) of the two-pole asynchronous starting synchronous reluctance motor rotor close to the q-axis, and a tooth width K of a stator core of the stator (40) and the distance D6 satisfy D6>K.

24. A compressor, characterized in that: A motor comprising any one of claims 19 to 23.

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