CN210640747U - Permanent magnet synchronous motor rotor and compressor with same - Google Patents
Permanent magnet synchronous motor rotor and compressor with same Download PDFInfo
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- CN210640747U CN210640747U CN201921433504.7U CN201921433504U CN210640747U CN 210640747 U CN210640747 U CN 210640747U CN 201921433504 U CN201921433504 U CN 201921433504U CN 210640747 U CN210640747 U CN 210640747U
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Abstract
The utility model provides a PMSM rotor and have its compressor. The permanent magnet synchronous motor rotor includes: the rotor comprises a rotor body, wherein a plurality of permanent magnet grooves are formed in the circumferential direction of the rotor body, and a magnetic pole center line is arranged between every two adjacent permanent magnet grooves; the permanent magnet, the permanent magnet sets up in the permanent magnet inslot, and the first end of permanent magnet sets up towards shaft hole one side of rotor body, and the second end of permanent magnet extends the setting towards the outward flange of rotor body, and permanent magnetThe first end of the body has a thickness of H1 along the circumferential direction of the rotor body, and the midpoint of the end of the first end of the permanent magnet has a length of L1 extending to the center line of the adjacent magnetic pole along the circumferential direction of the rotor body, wherein,
the permanent magnet synchronous motor rotor structure with the structure can effectively improve the motor torque of the rotor structure, improve the motor efficiency, improve the cost performance of the motor and improve the demagnetization resistance of the motor.
Description
Technical Field
The utility model relates to a compressor equipment technical field particularly, relates to a PMSM rotor and have its compressor.
Background
The tangential permanent magnet synchronous motor has a magnetism gathering effect, and a larger air gap magnetic density can be obtained by adopting a permanent magnet with low remanence, so that the motor has a larger torque-current ratio and torque-volume ratio, and is increasingly applied to occasions such as servo systems, electric traction, office automation, household appliances and the like.
Because the two surfaces of a single permanent magnet simultaneously provide air gap magnetic flux, the magnetic circuit is of a parallel structure, the working point of the rotor permanent magnet is lower than that of a radial permanent magnet synchronous motor, the efficiency of the tangential permanent magnet synchronous motor is easily reduced, and the tangential permanent magnet synchronous motor is at risk of demagnetization in severe environment and cannot run. Although the tangential permanent magnet motor adopted in the prior art can improve the demagnetization resistance of the motor, the motor efficiency and the demagnetization capability are still lower.
SUMMERY OF THE UTILITY MODEL
A primary object of the present invention is to provide a rotor of a permanent magnet synchronous motor and a compressor having the same to solve the problem of low motor efficiency of the prior art.
In order to achieve the above object, according to an aspect of the present invention, there is provided a permanent magnet synchronous motor rotor, including: a rotor body, a plurality of which are arranged in the circumferential directionThe permanent magnet slots are provided with magnetic pole center lines between adjacent permanent magnet slots; permanent magnets, the permanent magnets are arranged in the permanent magnet slots, the first ends of the permanent magnets are arranged towards one side of the shaft hole of the rotor body, the second ends of the permanent magnets are arranged towards the outer edge of the rotor body in an extending mode, the thickness of the first ends of the permanent magnets along the circumferential direction of the rotor body is H1, the length of the middle points of the end portions of the first ends of the permanent magnets extending to the center line of the adjacent magnetic poles along the circumferential direction of the rotor body is L1, wherein,
further, the second ends of the permanent magnets have a thickness H2 in the circumferential direction of the rotor body, and the length L2 at the midpoint of the ends of the second ends of the permanent magnets, extending in the circumferential direction of the rotor body to the center line of the adjacent magnetic pole, wherein,
further, the radius of the rotor body is Rr, and the length of the permanent magnet along the radial direction of the rotor body is L3, wherein, L3 is not less than 0.45 Rr and not more than 0.7 Rr.
Further, the thickness of the first end of the permanent magnet to the second end of the permanent magnet is gradually increased.
Further, the permanent magnet includes a plurality of component sections, and a plurality of component sections set gradually along rotor body's radial direction, and the thickness of at least one component section in a plurality of component sections is different with the thickness of remaining component section.
Further, the plurality of component sections includes: the first component section is arranged close to one side of the shaft hole; a second constituent segment located outside the first constituent segment.
Further, the thickness of the end, facing the shaft hole, of the first component section is larger than that of the end, far away from the shaft hole, of the first component section, and the thickness of the end, facing the shaft hole, of the second component section is smaller than that of the end, far away from the shaft hole, of the second component section.
Further, the thickness of the end of the first component section far away from the shaft hole is C, the thickness of the end of the first component section facing the shaft hole is H1, wherein 0.7H 1 is not less than C not more than 0.95H 1, and/or the length of the first component section along the radial direction of the rotor body is D, the total length of the first component section and the second component section along the radial direction of the rotor body is L3, wherein 0.2L 3 is not less than D not more than 0.6L 3.
Further, the thickness of the end, facing the shaft hole, of the second component section is larger than or equal to the thickness of the end, far away from the shaft hole, of the first component section.
Further, the thickness of the end, facing the shaft hole, of the first component section is smaller than that of the end, far away from the shaft hole, of the first component section, and the thickness of the end, facing the shaft hole, of the second component section is smaller than or equal to that of the end, far away from the shaft hole, of the second component section.
Furthermore, the thickness of the end, far away from the shaft hole, of the first component section is E, and the thickness of the end, facing the shaft hole, of the second component section is F, wherein E/F is more than or equal to 1.35 and more than or equal to 1.2.
Further, the plurality of component sections further comprises: the third group of segmentation, the third group of segmentation is located the outside of second segmentation, and the thickness of the orientation shaft hole one end of first segmentation is less than the thickness of keeping away from shaft hole one end of first segmentation, and the thickness of the orientation shaft hole one end of second segmentation is the same with the thickness of keeping away from shaft hole one end of second segmentation, and the thickness of the orientation shaft hole one end of third segmentation is less than the thickness of keeping away from shaft hole one end of third segmentation.
Further, the thickness of the first component section facing one end of the shaft hole is H1, and the thickness of the second component section is G, wherein 1.2 ≧ G/H1 ≧ 1.
Furthermore, the long side direction of the first component section is provided with a first side wall and a second side wall opposite to the first side wall, the long side direction of the second component section is provided with a third side wall and a fourth side wall opposite to the third side wall, the third side wall and the first component section are positioned on the same side, the second side wall and the fourth side wall are positioned on the same side, and the extension line of the third side wall, the extension line of the first side wall, the first end of the first component section and the extension line of the first end of the first component section are enclosed to form two triangles with the same area.
Furthermore, the long side direction of the first component has a first side wall and a second side wall opposite to the first side wall, the long side direction of the third component has a fifth side wall and a sixth side wall opposite to the fifth side wall, the fifth side wall and the first side wall are located at the same side, the sixth side wall and the second side wall are located at the same side, the extension line of the fifth side wall is connected with the end part of the first end of the first component, the extension line of the fifth side wall, the first side wall and the extension line of the end part of the second end of the first component enclose a first triangle, the extension line of the fifth side wall, the side wall of the second component and the end part of the first end of the third component enclose a second triangle, and the area of the first triangle is the same as that of the second triangle.
According to the utility model discloses an on the other hand provides a compressor, including the PMSM rotor, the PMSM rotor is foretell PMSM rotor.
Use the technical scheme of the utility model, set up the position relation of the magnetic pole central line of arranging permanent magnet and rotor core that can be reasonable like this, adopt the PMSM rotor structure of this structure, can improve the motor torque who has this rotor structure effectively, improve motor efficiency, improve the motor price/performance ratio, improve the anti demagnetization ability of motor.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a schematic structural view of a first embodiment of a permanent magnet synchronous motor rotor according to the present invention;
fig. 2 shows a schematic structural view of a second embodiment of a permanent magnet synchronous motor rotor according to the invention;
fig. 3 shows a schematic structural view of a third embodiment of a rotor of a permanent magnet synchronous motor according to the invention;
fig. 4 shows a schematic structural view of a fourth embodiment of a permanent magnet synchronous motor rotor according to the invention;
fig. 5 shows a schematic structural view of a fifth embodiment of a permanent magnet synchronous motor rotor according to the present invention;
fig. 6 shows a schematic structural view of a sixth embodiment of a permanent magnet synchronous motor rotor according to the present invention;
fig. 7 shows a schematic structural view of a seventh embodiment of a rotor of a permanent magnet synchronous motor according to the invention;
fig. 8 shows a schematic diagram of the relationship of motor efficiency to (H1/2)/L1 of a motor according to the present invention;
FIG. 9 is a schematic diagram illustrating motor torque versus L3/Rr according to the present invention;
fig. 10 shows a schematic of the relationship of motor efficiency to (H2/2)/L2 of a motor according to the present invention;
fig. 11 shows a schematic diagram of the demagnetization current improvement effect according to the present invention;
fig. 12 shows a schematic structural view of an embodiment of the electrical machine according to the invention.
Wherein the figures include the following reference numerals:
10. a rotor body; 11. a permanent magnet slot; 12. a shaft hole;
20. a permanent magnet;
31. a first composition segment; 311. a first side wall; 312. a second side wall;
32. a second composition segment; 321. a third side wall; 322. a fourth side wall;
33. a third group of segments; 331. a fifth side wall; 332. a sixth side wall;
40. a non-magnetic conductive collar; 50. and a stator.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.
Referring to fig. 1 to 11, according to an embodiment of the present application, a permanent magnet synchronous motor rotor is provided.
Specifically, as shown in fig. 1, the permanent magnet synchronous motor rotorComprising a rotor body 10 and permanent magnets 20. The rotor body 10 has a plurality of permanent magnet slots 11 formed in the circumferential direction. Adjacent permanent magnet slots 11 have a pole center line therebetween. The permanent magnets 20 are disposed in the permanent magnet slots 11, first ends of the permanent magnets 20 are disposed toward the shaft hole 12 side of the rotor body 10, second ends of the permanent magnets 20 are disposed to extend toward the outer edge of the rotor body 10, a thickness of the first ends of the permanent magnets 20 along the circumferential direction of the rotor body 10 is H1, a length of the midpoint of the end portions of the first ends of the permanent magnets 20 extending to the center line of the adjacent magnetic poles along the circumferential direction of the rotor body 10 is L1, wherein,
in this embodiment, set up the position relation of the magnetic pole central line Q who arranges the first end of permanent magnet and rotor core that can be reasonable like this, adopt the PMSM rotor structure of this structure, can improve the motor torque that has this rotor structure effectively, improve motor efficiency, improve the motor price/performance ratio, improve the anti demagnetization ability of motor.
Further, the second ends of the permanent magnets 20 have a thickness H2 in the circumferential direction of the rotor body 10, and the midpoint of the end of the second end of the permanent magnet 20, which extends to the adjacent pole center line in the circumferential direction of the rotor body 10, has a length L2, wherein,
the position relation of the second end of arranging the permanent magnet and the magnetic pole central line Q of the rotor core reasonably can be set, the rotor structure of the permanent magnet synchronous motor with the structure is adopted, the motor torque with the rotor structure can be effectively improved, the motor efficiency is improved, the cost performance of the motor is improved, and the demagnetization resistance of the motor is improved. The first end of the permanent magnet 20 intersects the magnetic pole center line at a point a, and the second end of the permanent magnet 20 intersects the magnetic pole center line at a point B, where the point B is located at the edge of the rotor body 10. Since in the embodiment shown in fig. 1, the plurality of permanent magnets 20 are all identical in structure and are uniformly arranged in the permanent magnet slot 11 of the rotor body, the first end of each permanent magnet 20 reaches to be adjacent to the permanent magnet 20The distances from the second end of each permanent magnet 20 to the magnetic pole center line Q adjacent to the permanent magnet 20 are all equal. The permanent magnet 20 in the present application is magnetized tangentially, that is, the motor having the rotor structure of the permanent magnet synchronous motor is a tangential permanent magnet synchronous motor.
In order to further improve the performance of the motor with the rotor structure, the radius of the rotor body 10 is set to Rr, and the length of the permanent magnet 20 along the radial direction of the rotor body 10 is L3, wherein, 0.45 Rr is less than or equal to L3 is less than or equal to 0.7 Rr. In the present embodiment, the thickness from the first end of the permanent magnet 20 to the second end of the permanent magnet 20 is gradually increased.
As shown in fig. 3 to 7, the permanent magnet 20 includes a plurality of constituent segments, which are sequentially arranged in a radial direction of the rotor body 10, and at least one of the plurality of constituent segments has a thickness different from that of the remaining constituent segments. The arrangement can also improve the demagnetization resistance of the motor.
Specifically, as shown in fig. 3, the plurality of component sections includes a first component section 31 and a second component section 32. The first constituent segment 31 is disposed near the shaft hole 12 side. The second constituent segment 32 is located outside the first constituent segment 31. The thickness of the first component 31 facing the shaft hole 12 is greater than that of the first component 31 facing the shaft hole 12, and the thickness of the second component 32 facing the shaft hole 12 is less than that of the second component 32 facing the shaft hole 12.
Preferably, the thickness of the end of the first constituent segment 31 away from the shaft hole 12 is C, the thickness of the first constituent segment 31 toward the end of the shaft hole 12 is H1, wherein 0.7 × H1 ≦ C ≦ 0.95 × H1, the length of the first constituent segment 31 in the radial direction of the rotor body 10 is D, and the total length of the first constituent segment 31 and the second constituent segment 32 in the radial direction of the rotor body 10 is L3, wherein 0.2 × L3 ≦ D ≦ 0.6 × L3.
According to another embodiment of the present application, the thickness of the second constituent segment 32 toward the end of the shaft hole 12 is greater than or equal to the thickness of the first constituent segment 31 away from the end of the shaft hole 12. As shown in fig. 4, fig. 4 shows an embodiment in which the thickness of the second constituent segment 32 toward the end of the shaft hole 12 is equal to the thickness of the first constituent segment 31 away from the end of the shaft hole 12.
As shown in fig. 5, in the present embodiment, the thickness of the first constituent segment 31 at the end facing the shaft hole 12 is smaller than the thickness of the first constituent segment 31 at the end away from the shaft hole 12, and the thickness of the second constituent segment 32 at the end facing the shaft hole 12 is smaller than the thickness of the second constituent segment 32 at the end away from the shaft hole 12. Wherein, preferably, the thickness of the end of the first component section 31 far away from the shaft hole 12 is E, and the thickness of the end of the second component section 32 facing the shaft hole 12 is F, wherein, 1.35 ≧ E/F ≧ 1.2. The arrangement can effectively improve the performance of the motor. Of course, it is also possible to arrange the second constituent segments 32 in an equal width manner, i.e. as in the embodiment shown in fig. 6.
As shown in fig. 7, the plurality of component segments further includes a third component segment 33. The third component 33 is located outside the second component 32, the thickness of the first component 31 facing the end of the shaft hole 12 is smaller than the thickness of the first component 31 facing the end far from the shaft hole 12, the thickness of the second component 32 facing the end of the shaft hole 12 is the same as the thickness of the second component 32 facing the end far from the shaft hole 12, and the thickness of the third component 33 facing the end of the shaft hole 12 is smaller than the thickness of the third component 33 facing the end far from the shaft hole 12. The thickness of the first component section 31 facing the shaft hole 12 is H1, the thickness of the second component section 32 is G, wherein 1.2 ≧ G/H1 ≧ 1.
As shown in fig. 3, the first constituent segment 31 has a first side wall 311 and a second side wall 312 disposed opposite to the first side wall 311 in the long side direction. The second constituent segment 32 has a third sidewall 321 and a fourth sidewall 322 disposed opposite to the third sidewall 321 in the longitudinal direction, and the third sidewall 321 is located on the same side as the first constituent segment 31. The second sidewall 312 and the fourth sidewall 322 are located on the same side, and the extension line of the third sidewall 321 and the extension lines of the first sidewall 311, the first end of the first constituent segment 31 and the first end of the first constituent segment 31 enclose two triangles with the same area, i.e., as shown in S1 and S2.
According to another embodiment of the present application, the first constituent segment 31 has a first sidewall 311 and a second sidewall 312 disposed opposite to the first sidewall 311 in the long side direction, and the third constituent segment 33 has a fifth sidewall 331 and a sixth sidewall 332 disposed opposite to the fifth sidewall 331 in the long side direction, and the fifth sidewall 331 is located on the same side as the first sidewall 311. The sixth side wall 332 and the second side wall 312 are located on the same side, an extension line of the fifth side wall 331 is connected to an end of the first component 31, an extension line of the fifth side wall 331, extension lines of the first side wall 311 and an end of the second end of the first component 31 enclose a first triangle S3, an extension line of the fifth side wall 331, an end of the first end of the second component 32 and an end of the first end of the third component 33 enclose a second triangle S4, and an area of the first triangle S3 is the same as an area of the second triangle S4.
Permanent magnet synchronous machine rotor in the above-mentioned embodiment can also be used for electrical equipment technical field, promptly according to the utility model discloses an on the other hand provides a compressor, including permanent magnet synchronous machine rotor, permanent magnet synchronous machine rotor is the permanent magnet synchronous machine rotor in the above-mentioned embodiment.
Specifically, the application provides a permanent magnet synchronous motor rotor, permanent magnet evenly distributed is on the rotor, contains N permanent magnet of placing along the rotor radial direction, and permanent magnet tangential magnetization, N are more than or equal to 4's even number, and two adjacent permanent magnets have the opposite setting of the same polarity. Because the two surfaces of a single permanent magnet simultaneously provide air gap magnetic flux, the magnetic circuit is of a parallel structure, the working point of the rotor permanent magnet is lower than that of a radial permanent magnet synchronous motor, the efficiency of the tangential permanent magnet synchronous motor is easily reduced, and the tangential permanent magnet synchronous motor is at risk of demagnetization in severe environment and cannot run. Research shows that the thickness of the inner side of a permanent magnet of a tangential permanent magnet synchronous motor is increased, the torque of the motor is improved, the efficiency of the motor is improved, but the thickness is increased to a certain degree, the efficiency is not improved any more, the thickness of the inner side is increased, the using amount of the permanent magnet is increased, the cost performance of the motor is reduced, the position close to a rotating shaft is the inner side of the permanent magnet, the position close to the outer diameter of a rotor is the inner side of the permanent magnet, the permanent magnet has a certain thickness in the circumferential direction of the rotor, the thickness of the inner side of the permanent magnet is set to be in H, the edge line of the inner,when the H1 and L1 should satisfy the following relationship:
in time, can be so that promote motor torque, promote motor efficiency, promote the motor price/performance ratio, inboard thickness increase simultaneously, the motor demagnetization ability promotes.
The length of the permanent magnet in the rotor radial direction is set to L3, the rotor radius is set to Rr, and the following relationship should be satisfied for L3 and Rr: 0.45 Rr is not less than L3 is not less than 0.7 Rr, under a certain preset rotor outer diameter, the length of the permanent magnet in the radial direction is increased towards the inner side of the rotor, the section for providing effective magnetic flux is increased, the motor flux linkage is increased, but the length of the permanent magnet towards the inner side is increased, the arrangement space of the magnetic isolation structure at the inner side can be reduced, the magnetic isolation structure can be a magnetic isolation bridge or a non-magnetic conduction lantern ring, so that the magnetic isolation bridge is shortened, or the radial length of the non-magnetic conduction lantern ring is shortened, the inner side magnetic flux leakage is increased, the motor flux linkage is reduced, and the L3 and the Rr meet the following relations: when L3 is not less than 0.45 Rr and not more than 0.7 Rr, the magnetic linkage of the motor is the highest, the torque of the motor is the largest, the efficiency of the motor is the best, and the cost performance of the motor is the best.
The outer side of the permanent magnet has a certain thickness in the circumferential direction of the rotor, the thickness of the outer side of the permanent magnet is H2, the outer edge line of the permanent magnet extends to the central line of the magnetic pole, the intersection point is B, the distance between the central point of the outer edge line and B is L2, and the H2 and the L2 should satisfy the following relations:
the thickness of the outer side of the permanent magnet is increased, the motor flux linkage is increased, the motor torque is increased, the demagnetization resistance of the motor is improved, but when H2/2 is more than 0.5L 2, the magnetic conduction area of a rotor magnetic pole is reduced, the motor flux linkage is reduced, the motor torque is reduced, the motor efficiency is reduced, and therefore when the thickness of the outer side of the permanent magnet is increased, the motor flux linkage is increased, the motor torque is increased, and
and meanwhile, the efficiency of the motor is optimal, and the cost performance of the motor is optimal.
The thickness of the permanent magnet is arranged in the radial direction of the rotor in a non-uniform thickness mode, each section of magnetic steel is arranged in the radial direction in a non-uniform thickness mode, at least two sections are arranged, for example, the permanent magnet is arranged in the radial direction of the rotor in two sections, the first section is thin outside and thick inside, the second section is thick outside and thin inside, the thickness of the outer side of the first section is smaller than the thickness of the inner side of the second section, the thickness of the outer side of the first section is C, the thickness of the inner side of the permanent magnet is H1: when C is not less than 0.7H 1 and not more than 0.95H 1, because the inner side corner of the permanent magnet is easy to demagnetize, the thickness of the inner side of the permanent magnet is further increased, the working point of the inner side of the permanent magnet is improved, the demagnetization resistance of the motor is improved, and meanwhile, the removed area S1 of the permanent magnet is equal to the supplemented area S2 of the permanent magnet, so that the demagnetization resistance of the motor is improved and the reliability of the motor is improved under the condition that the using amount of the permanent magnet is the same.
Further, the length of the first segment in the radial direction is set to D, the length of the permanent magnet in the rotor radial direction is set to L3, and the following relationship should be satisfied for D and L3: d is not less than 0.2L 3 and not more than 0.6L3, when D is less than 0.2L 3, the length of the first section is too short, the working point improvement of the permanent magnet is small, the anti-demagnetization capability of the motor is small, when D is more than 0.6L3, although the anti-demagnetization capability of the permanent magnet of the first section is improved, the length of the second section is too short, the working point of the second section is reduced, and the overall anti-demagnetization capability of the motor is reduced, so when D is not less than 0.2L 3 and not more than 0.6L3, the anti-demagnetization capability of the motor is improved under the condition that the usage amount of the permanent magnets is equivalent.
The permanent magnet is arranged into two sections in the radial direction of the rotor, the first section is thin outside and thick inside, the second section is thick outside and thin inside, the thickness of the outer side of the first section is equal to (or larger than) the thickness of the inner side of the second section, the thickness of each part of the permanent magnet of the first section in the radial direction can be improved, the inner side is increased more, the outer side is increased less, the working point of the inner permanent magnet is further improved, the demagnetization resistance of the motor is further improved, the flux linkage of the motor is improved, and the torque of the motor is improved.
The permanent magnet is arranged into two sections in the radial direction of the rotor, the first section is thick outside and thin inside, the second section is thick outside and thin inside, the thickness of the outer side of the first section is larger than the thickness of the inner side of the second section, the thickness of the outer side of the first section is E, the thickness of the inner side of the second section is F, and the E and the F meet the following relations: 1.35 is more than or equal to E/F is more than or equal to 1.2, can make the permanent magnet of first section all improve along the thickness of each department on the radial direction, the outside increases more, the inboard increases less, the operating point of inboard permanent magnet further promotes, the anti demagnetization ability of motor further promotes, promotes the flux linkage of motor simultaneously, promotes motor torque, but when E/F > 1.35, the permanent magnet quantity is too big, the motor cost increase is more, the motor price/performance ratio reduces, so should set up E/F: E/F is more than or equal to 1.35 and more than or equal to 1.2.
The permanent magnet is arranged into 3 sections in the radial direction of the rotor, the first section is thin in the inner part and thick in the outer part, the second section is equal in thickness, the third section is thin in the inner part and thick in the outer part, the thickness of the second section is G, the thickness of the inner side of the first section is H1, and the G and H1 satisfy the following relations: 1.2 is more than or equal to G/H1 and more than or equal to 1, the rotor of the permanent magnet is arranged in a radial unequal thickness mode, the permanent magnet of the tangential motor is mainly easy to demagnetize on the inner side and the outer side of the permanent magnet, so that the thickness of the middle position is reduced, the two sides are thickened, the working points on the inner side and the outer side of the permanent magnet are improved, the demagnetization resistance of the motor is improved, when G/H1 is less than 1, the middle thickness is too thin, the flux linkage of the motor is reduced, the motor torque is reduced, when G/H1 is more than 1.2, the using amount of the permanent magnet is increased, the motor cost performance is reduced, when G/H1 is more than or equal to 1.2, the demagnetization resistance of. Wherein the motor further comprises a non-magnetically conductive collar 40 and a stator 50.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition to the foregoing, it should be noted that reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally throughout this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (16)
1. A permanent magnet synchronous motor rotor, comprising:
the rotor comprises a rotor body (10), wherein a plurality of permanent magnet grooves (11) are formed in the circumferential direction of the rotor body (10), and a magnetic pole center line is arranged between every two adjacent permanent magnet grooves (11);
permanent magnet (20), permanent magnet (20) set up in permanent magnet groove (11), the first end orientation of permanent magnet (20) shaft hole (12) one side setting of rotor body (10), the second end orientation of permanent magnet (20) the outward flange of rotor body (10) extends the setting, the first end of permanent magnet (20) is followed the thickness of the circumference of rotor body (10) is H1, the mid point department of the tip of the first end of permanent magnet (20), follow the circumference of rotor body (10) extends to adjacent the length of magnetic pole central line department is L1, wherein,
0.9*L1。
2. the permanent magnet synchronous motor rotor according to claim 1, wherein the second ends of the permanent magnets (20) have a thickness H2 in the circumferential direction of the rotor body (10), and the length extending to the adjacent pole center line in the circumferential direction of the rotor body (10) at the midpoint of the ends of the second ends of the permanent magnets (20) is L2, wherein,
3. the permanent magnet synchronous motor rotor according to claim 1 or 2, characterized in that the rotor body (10) has a radius Rr and the permanent magnets (20) have a length L3 in the radial direction of the rotor body (10), wherein 0.45 Rr ≦ L3 ≦ 0.7 Rr.
4. A rotor according to claim 1, characterised in that the thickness of the first end of the permanent magnet (20) to the second end of the permanent magnet (20) is arranged to increase gradually.
5. The permanent magnet synchronous motor rotor according to claim 1, characterized in that the permanent magnet (20) comprises a plurality of component sections, which are arranged in sequence in a radial direction of the rotor body (10), at least one of the component sections having a thickness different from the thickness of the remaining component sections.
6. The PMSM rotor of claim 5, wherein the plurality of component sections include:
a first component section (31), wherein the first component section (31) is arranged close to one side of the shaft hole (12);
a second constituent segment (32), the second constituent segment (32) being located outside the first constituent segment (31).
7. The permanent magnet synchronous motor rotor according to claim 6,
the orientation of first component section (31) the thickness of shaft hole (12) one end is greater than keeping away from of first component section (31) the thickness of shaft hole (12) one end, the orientation of second component section (32) the thickness of shaft hole (12) one end is less than keeping away from of second component section (32) the thickness of shaft hole (12) one end.
8. The permanent magnet synchronous motor rotor according to claim 7,
the thickness of the end of the first component section (31) far away from the shaft hole (12) is C, the thickness of the end of the first component section (31) facing the shaft hole (12) is H1, wherein C is more than or equal to 0.7 and H1 and less than or equal to 0.95 and H1, and/or
The first component section (31) has a length D in the radial direction of the rotor body (10), and the first component section (31) and the second component section (32) have a total length L3 in the radial direction of the rotor body (10), wherein D is 0.6L3 at 0.2L 3.
9. The permanent magnet synchronous motor rotor as recited in claim 7, characterized in that the thickness of the second component section (32) towards the end of the shaft hole (12) is greater than or equal to the thickness of the first component section (31) away from the end of the shaft hole (12).
10. The permanent magnet synchronous motor rotor according to claim 6,
the thickness of first component section (31) orientation shaft hole (12) one end is less than keeping away from of first component section (31) the thickness of shaft hole (12) one end, the thickness of second component section (32) orientation shaft hole (12) one end is less than or equal to keeping away from of second component section (32) the thickness of shaft hole (12) one end.
11. The permanent magnet synchronous motor rotor according to claim 10,
the thickness of one end, far away from the shaft hole (12), of the first component section (31) is E, the thickness of one end, facing the shaft hole (12), of the second component section (32) is F, and the E/F is more than or equal to 1.35 and more than or equal to 1.2.
12. The permanent magnet synchronous motor rotor of claim 6, wherein a plurality of the constituent segments further comprise:
third group segmentation (33), third group segmentation (33) is located the outside of second segmentation (32), the orientation of first segmentation (31) the thickness of shaft hole (12) one end is less than keeping away from of first segmentation (31) the thickness of shaft hole (12) one end, the orientation of second segmentation (32) the thickness of shaft hole (12) one end with keeping away from of second segmentation (32) the thickness of shaft hole (12) one end is the same, the orientation of third segmentation (33) the thickness of shaft hole (12) one end is less than keeping away from of third segmentation (33) the thickness of shaft hole (12) one end.
13. The permanent magnet synchronous motor rotor according to claim 6,
the thickness of one end, facing the shaft hole (12), of the first component section (31) is H1, the thickness of the second component section (32) is G, and the ratio of G to H1 is more than or equal to 1.2.
14. The permanent magnet synchronous motor rotor according to claim 7,
the long side direction of first composition section (31) has first lateral wall (311) and with second lateral wall (312) that first lateral wall (311) set up relatively, the long side direction of second composition section (32) have third lateral wall (321) and with fourth lateral wall (322) that third lateral wall (321) set up relatively, third lateral wall (321) with first composition section (31) are located same side, second lateral wall (312) with fourth lateral wall (322) are located the same side, the extension line of third lateral wall (321) with first lateral wall (311), the first end of first composition section (31) with the extension line of the first end of first composition section (31) encloses into two triangles that the area is the same.
15. The permanent magnet synchronous motor rotor of claim 12,
the long side direction of the first component (31) is provided with a first side wall (311) and a second side wall (312) opposite to the first side wall (311), the long side direction of the third component (33) is provided with a fifth side wall (331) and a sixth side wall (332) opposite to the fifth side wall (331), the fifth side wall (331) and the first side wall (311) are located at the same side, the sixth side wall (332) and the second side wall (312) are located at the same side, the extension line of the fifth side wall (331) is connected with the end part of the first end of the first component (31), the extension line of the fifth side wall (331) and the end part of the extension line of the second end of the first component (31) enclose into a first triangle, and the extension line of the fifth side wall (331) and the side wall (312) of the second component (32), A second triangle is enclosed between the end parts of the first ends of the third component parts (33), and the area of the first triangle is the same as that of the second triangle.
16. A compressor comprising a permanent magnet synchronous motor rotor, characterized in that the permanent magnet synchronous motor rotor is the permanent magnet synchronous motor rotor of any one of claims 1 to 15.
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| CN201921433504.7U CN210640747U (en) | 2019-08-30 | 2019-08-30 | Permanent magnet synchronous motor rotor and compressor with same |
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| CN201921433504.7U CN210640747U (en) | 2019-08-30 | 2019-08-30 | Permanent magnet synchronous motor rotor and compressor with same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021036460A1 (en) * | 2019-08-30 | 2021-03-04 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent magnet synchronous motor rotor and compressor having same |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021036460A1 (en) * | 2019-08-30 | 2021-03-04 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent magnet synchronous motor rotor and compressor having same |
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