CN114039435B - Rotor structure, motor structure, compressor structure and refrigeration equipment - Google Patents
Rotor structure, motor structure, compressor structure and refrigeration equipment Download PDFInfo
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- CN114039435B CN114039435B CN202111299000.2A CN202111299000A CN114039435B CN 114039435 B CN114039435 B CN 114039435B CN 202111299000 A CN202111299000 A CN 202111299000A CN 114039435 B CN114039435 B CN 114039435B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Embodiments of the present application provide a rotor structure, a motor structure, a compressor structure, and a refrigeration apparatus, wherein the rotor structure includes: the rotor core is provided with a plurality of magnetic steel grooves, and each magnetic steel groove penetrates through two end faces of the rotor core along the axial direction; the magnetic piece is arranged in the magnetic steel groove; the magnetic pieces are ferrite, one ends of at least two adjacent magnetic steel grooves close to the axis of the rotor core are communicated, and a gap exists between the magnetic pieces and one ends of the magnetic steel grooves close to the axis of the rotor core. According to the technical scheme, the utilization effect of the ferrite magnetic steel can be enhanced, the magnetic gathering capability and the anti-demagnetizing capability are improved, the energy efficiency is improved, and the motor cost is reduced.
Description
Technical Field
The application relates to the technical field of motors, in particular to a rotor structure, a motor structure, a compressor structure and refrigeration equipment.
Background
The magnetic steel of the current motor is usually manufactured by adopting a rare earth material, however, along with the limitation of the yield of rare earth resources, some motors are replaced by adopting ferrite, and the magnetic property of the ferrite is weak compared with that of the magnetic steel made of the rare earth material, so that the use requirement of the motor cannot be met.
Disclosure of Invention
The present application aims to solve at least one of the technical problems existing in the prior art or related art.
In view of this, embodiments of the first aspect of the present application provide a rotor structure.
Embodiments of the second aspect of the present application provide a motor structure.
Embodiments of the third aspect of the present application provide a compressor structure.
Embodiments of the fourth aspect of the present application provide a refrigeration apparatus.
To achieve the above object, an embodiment of a first aspect of the present application provides a rotor structure including: the rotor core is provided with a plurality of magnetic steel grooves, and each magnetic steel groove penetrates through two end faces of the rotor core along the axial direction; the magnetic piece is arranged in the magnetic steel groove; the magnetic pieces are ferrite, one ends of at least two adjacent magnetic steel grooves close to the axis of the rotor core are communicated, and a gap exists between the magnetic pieces and one ends of the magnetic steel grooves close to the axis of the rotor core.
The rotor structure mainly comprises a rotor core and a magnetic piece, wherein a magnetic steel groove is formed in the rotor core, the magnetic piece is arranged on the rotor core, and therefore the rotor structure can rotate integrally under the action of a stator at a corresponding position conveniently. Specifically, the magnet steel groove runs through the both ends of rotor core along the axial to the magnetism spare in the magnet steel groove can receive tangential magnetic field's effect to take place to rotate, needs to emphasize that, the material of magnetism spare in this scheme is ferrite, can replace under rare condition of rare earth resource, saves material cost, in addition, owing to selected ferrite, is difficult for taking place the demagnetization when high temperature operation, and ferrite magnetism is weaker, and the weak magnetism electric current that high-speed weak magnetism needs is lower, is favorable to the high quick-witted high-speed improvement. It should be noted that, the magnetic performance of the ferrite itself is reduced compared with the conventional rare earth, so that the shape of the magnetic steel grooves needs to be adjusted, specifically, the inner sides of at least two adjacent magnetic steel grooves are communicated, so that the magnetic leakage path can be reduced, the defect of weak magnetic performance of the ferrite itself can be overcome, and the magnetic focusing effect can be improved.
Generally, the cross section of the rotor core is circular, namely the rotor core is cylindrical as a whole, and a plurality of magnetic steel grooves are uniformly formed in the rotor core, so that the rotating speed in the rotating process is stable, and the outer contour of the circular rotor can reduce the windmilling loss in the rotating process of the rotor.
The technical scheme comprises the following steps: the magnetic isolation grooves are formed in one ends, close to the axis of the rotor core, of the two adjacent magnetic steel grooves, and are communicated with the two adjacent magnetic steel grooves.
In the technical scheme, the magnetism isolating grooves are formed between the two adjacent magnetic steel grooves, so that the two adjacent magnetic steel grooves are communicated through the magnetism isolating grooves, leakage magnetic paths are reduced, the defect of weak magnetism of ferrite is overcome, and magnetism collecting effect is improved.
The technical scheme comprises the following steps: and the separation ribs are arranged on the rotor core, and the separation ribs are arranged between at least two adjacent magnetic steel grooves.
In this technical scheme, through set up the spacer bar on rotor core, can guarantee basic structural strength for produce the connection between radial inner structure and the outer structure, guarantee to rotate jointly.
In the above technical scheme, the number of the magnetic steel grooves is even, and the magnetic isolation grooves and the separation ribs are arranged in a staggered manner along the circumferential direction of the rotor core.
In this technical scheme, through setting up even number magnet steel groove, can hold the magnetism spare in every magnet steel groove to the magnetic force that receives when rotating is comparatively symmetrical even, guarantees the stability of rotational speed. On this basis, through with separate magnetism groove and the crisscross setting of separating muscle for the focus of rotor core whole when rotatory is more stable.
According to the technical scheme, on the cross section of the rotor core, the first radial contour line of the magnetic part on the radial inner side of the rotor core is parallel to the second radial contour line on the radial outer side, and the ratio range between the second radial contour line and the first radial contour line is 0.75-1.
In the technical scheme, the first radial contour line and the second radial contour line are limited to be parallel, so that the processing is convenient, and the inner contour line and the outer contour line which are arranged in parallel can enable the motor to run more stably during rotation.
The first radial contour line may be a straight line or a curved line. Likewise, the second radial contour may be straight or curved.
It is emphasized that although the length of the second radial contour on the radially outer side is smaller than the length of the first radial contour, it is not too small to guarantee the necessary magnetic properties, so the lower limit of the ratio of the second radial contour to the first radial contour is defined, i.e. 0.75.
In the above technical scheme, the magnetic piece is connected with both ends of the first radial contour line along the corresponding first circumferential contour line and second circumferential contour line of the lateral wall of the circumferential both sides of the rotor core.
In this technical scheme, for the magnetic part, there are two lateral walls in the circumference direction, each lateral wall links to each other with radially inner wall, on the projection of cross section, two lateral walls are projected respectively and are first circumference contour and second circumference contour, these two circumference contour is drawn forth from the both ends of first radial contour, it is emphasized that because the shape of lateral wall on the projection face is the line type, so the lateral wall is in perpendicular relation with the rotor core, that is the extending direction of lateral wall is along axial extension, so that whole magnetic part can be better when rotating receives magnetic field force to rotate.
In the above technical scheme, the included angle between the first circumferential contour line and the second circumferential contour line is smaller than 20 °.
In the technical scheme, the included angle between the two side walls on the circumference of the magnetic part relative to the rotating shaft is limited, namely, the included angle between the two circumferential contour lines on the projection surface is large, magnetizing along the tangential direction is beneficial to magnetism gathering, and the defect of weak magnetism of ferrite is overcome.
In the above technical scheme, in the circumferential direction of the rotor core, the side walls of the magnetic steel grooves are attached to the side walls of the magnetic pieces on two sides of the rotor core in the circumferential direction.
In this technical scheme, when installing the magnetic part to the magnet steel groove, through restricting in circumference direction, the magnet steel groove is laminated with the circumference both sides of magnetic part to make the magnet steel groove carry out circumference spacing for the magnetic part, fixed magnetic part is in the position of magnet steel inslot, reduces the circumference removal when rotating.
In the above technical solution, further includes: and the outer diameter chamfers are arranged at two ends of the radial outer side of the magnetic piece along the circumferential direction of the rotor core.
In this technical scheme, through set up the external diameter chamfer respectively at the circumference both ends in the outside of magnetic part, can effectively increase the magnetic circuit magnetic resistance of leakage magnetic flux, can effectively reduce the leakage magnetic flux.
It is understood that the magnetic circuit of the magnetic member is formed by the inner side and the outer side of the magnetic member in the radial direction, and the magnetic member on the outer side in the radial direction is subjected to hole digging treatment on both sides in the circumferential direction, so that the magnetic leakage can be reduced.
In the technical scheme, on the cross section of the rotor core, the projections of the two outer diameter chamfers are a first connecting contour line and a second connecting contour line respectively; wherein the first connecting contour line and the second connecting contour line are respectively connected with the second radial contour line.
In the technical scheme, the projections of the two outer diameter chamfers on the cross section are limited to be linear, namely the first connecting contour line and the second connecting contour line, and the two connecting contour lines are respectively connected with the two ends of the second radial contour line, so that the shape of the whole magnetic piece is more regular, meanwhile, the projections of the linear form also indicate that the chamfers are cut in parallel to the axis, and the magnetic leakage is reduced on the basis of being convenient for processing.
In the technical scheme, the included angle between the first connecting profile and the second radial profile is smaller than 30 degrees; or the angle between the second connecting contour and the second radial contour is smaller than 30 °.
In the technical scheme, through limiting the included angle between the first connecting contour line and the second radial contour line to be smaller than 30 degrees respectively, the leakage flux magnetic circuit reluctance is increased, and the leakage flux is reduced.
Further, the first connecting contour line and the second connecting contour line have the same included angle with the second radial contour line, and are both smaller than 30 degrees.
In the technical scheme, the projection of the magnetic part on the cross section of the rotor core is symmetrical.
In this technical scheme, through restricting the magnetic part to be symmetrical structure, specifically be on rotor core's cross section, the projection of magnetic part is symmetrical form for rotor structure is more steady when rotating.
In the above technical scheme, the rotor core comprises a plurality of rotor punching sheets, and the plurality of rotor punching sheets are arranged in a stacked manner along the axial direction of the rotor core.
In the technical scheme, the rotor core is mainly formed by laminating a plurality of rotor punching sheets, so that on one hand, the eddy current loss can be reduced, and on the other hand, the processing is convenient.
According to a second aspect of the present application, there is provided an electrical machine structure comprising a stator structure; the rotor structure of any of the above embodiments is coaxially arranged with the stator structure, and the rotor structure is rotatable relative to the stator structure.
The motor structure provided by the application comprises a stator structure and a rotor structure, wherein for a stator core, when a stator winding is arranged in a winding groove by winding a stator tooth, the motor structure can play a normal magnetic field driving role on the rotor structure, so that the rotation of the rotor structure is realized. Specifically, the rotor structure and the stator structure are coaxially arranged and mainly comprise a rotor iron core and a permanent magnet, and when the stator structure is electrified to generate a vector magnetic field, the magnetic piece can rotate under the magnetic action, so that the movement of the rotor structure is realized.
The axis of the stator core is collinear with the axis of the rotor core, and the stator teeth and the permanent magnets are all arranged around the axis and are generally uniformly arranged.
Further, for the stator structure, the ratio of the inner diameter to the outer diameter is between 0.5 and 0.65, and the motor with the split ratio selected in the range has higher cost performance, is favorable for placing magnetic steel in a larger space on the rotor side, and improves the magnetic flux and the anti-demagnetizing capability of the magnetic steel. Further, the stator outer diameter D1 is 101.15mm, and the stator inner diameter Di1 is 62.7mm.
In the above technical solution, the stator structure specifically includes: the stator comprises a stator core and a stator winding, wherein the stator core comprises a stator yoke and a plurality of stator convex teeth which extend inwards from the stator yoke along the radial direction, the plurality of stator convex teeth are circumferentially distributed around the axis of the stator core, and the stator winding is wound on the stator convex teeth; the ratio of the width of the stator teeth to the thickness of the stator yoke is 1-1.5.
In this technical scheme, stator structure mainly includes stator core and stator winding two parts, and stator core includes stator yoke and stator dogtooth again, through restricting stator dogtooth to be arranged along circumference, restriction stator winding winds on stator dogtooth simultaneously to be convenient for form the pivoted magnetic field of drive rotor structure.
It is emphasized that by limiting the ratio of the width of the stator teeth to the thickness of the stator yoke, it is advantageous to ensure a tooth and yoke flux design such that while providing a smooth magnetic circuit, there is also some margin, i.e. unsaturation.
In the above technical scheme, the ratio between the number of the stator teeth and the number of the magnetic steel grooves of the rotor structure is 3:2; or the ratio between the number of the stator teeth and the number of the magnetic steel grooves of the rotor structure is 6:5.
in this solution, for the type of motor structure, the ratio is chosen to be 3 by definition: 2 or 6: and 5, the problems of weak magnetism, small iron loss and large copper loss of ferrite serving as a magnetic part can be greatly solved, and the adoption of the multi-slot pole structure is more beneficial to reducing the copper loss of windings.
An embodiment of a third aspect of the present application provides a compressor structure comprising: a first housing; the motor structure according to the second aspect is disposed in the first housing.
According to the compressor structure provided by the embodiment of the third aspect of the present application, the compressor structure comprises the first shell and the motor structure arranged in the first shell, and the motor structure in the embodiment of the second aspect is arranged in the compressor structure, so that the compressor structure has the beneficial effects of the motor structure and is not described herein again.
An embodiment of a fourth aspect of the present application provides a refrigeration apparatus, comprising: a second housing; the compressor of the third aspect is provided in the second casing.
According to the refrigeration equipment provided by the embodiment of the fourth aspect of the present application, the refrigeration equipment comprises the second shell and the compressor structure arranged in the second shell, and the compressor structure in the embodiment of the third aspect is arranged in the refrigeration equipment, so that the refrigeration equipment has the beneficial effects of the compressor structure and is not described herein again.
Among them, the refrigerating apparatus includes, but is not limited to, apparatuses having a refrigerating function such as a refrigerator, a freezer, an air conditioner, and the like.
Additional aspects and advantages of the application will be set forth in part in the description which follows, or may be learned by practice of the application.
Drawings
FIG. 1 shows a schematic structural view of a rotor structure according to one embodiment of the present application;
FIG. 2 shows a schematic structural view of a magnetic member according to one embodiment of the present application;
FIG. 3 is a graph illustrating back EMF coefficients versus angle between a first circumferential profile and a second circumferential profile in accordance with one embodiment of the present application;
fig. 4 shows a schematic structural view of a stator core according to an embodiment of the present application;
fig. 5 shows a schematic structural view of a rotor core according to an embodiment of the present application;
fig. 6 shows a schematic structural view of a stator structure according to an embodiment of the present application;
FIG. 7 shows a schematic structural diagram of a motor structure according to one embodiment of the application;
FIG. 8 shows a schematic structural view of a compressor structure according to an embodiment of the present application;
fig. 9 shows a schematic structural view of a refrigeration apparatus according to an embodiment of the present application.
The correspondence between the reference numerals and the component names in fig. 1 to 9 is:
100: a motor structure; 102: a stator structure; 1022: a stator core; 1023: a stator yoke; 1024: stator teeth; 1034: stator punching; 104: a rotor structure; 1042: a rotor core; 1044: a magnetic member; 1046: rotor punching; 1048: a magnetic steel groove; 1050: a first radial contour line; 1052: a second radial contour line; 1054: a first circumferential contour line; 1056: a second circumferential contour; 1058: a first connecting profile; 1060: a second connecting contour line; 108: a magnetism isolating groove; 110: a separation rib; 200: a compressor structure; 202: a first housing; 300: a refrigeration device; 302: and a second housing.
Detailed Description
In order that the above-recited objects, features and advantages of embodiments of the present application can be more clearly understood, a further detailed description of embodiments of the present application will be rendered by reference to the appended drawings and detailed description thereof. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, embodiments of the application may be practiced otherwise than as described herein, and therefore the scope of the application is not limited to the specific embodiments disclosed below.
Some embodiments according to the present application are described below with reference to fig. 1 to 9.
Example 1
The rotor structure 104 provided in this embodiment mainly includes a rotor core 1042 and a magnetic member 1044, where the rotor core 1042 is provided with a magnetic steel groove 1048, so that the magnetic member 1044 is disposed on the rotor core 1042, and thus the rotor structure 104 can be rotated integrally under the action of the stator at the corresponding position. Specifically, the magnetic steel groove 1048 penetrates through two ends of the rotor core 1042 along the axial direction, so that the magnetic piece 1044 in the magnetic steel groove 1048 can rotate under the action of the tangential magnetic field, and it is emphasized that the magnetic piece 1044 in the scheme is made of ferrite, so that the material can be replaced under the condition that rare earth resources are scarce, and the material cost is saved. It should be noted that, the magnetic performance of the ferrite itself is reduced compared with the conventional rare earth, so that the shape of the magnetic steel grooves 1048 needs to be adjusted, specifically, the inner sides of at least two adjacent magnetic steel grooves 1048 are communicated, so that the magnetic leakage path can be reduced, the defect of weak magnetic performance of the ferrite itself can be overcome, and the magnetic focusing effect can be improved.
Generally, the cross section of the rotor core 1042 is circular, that is, the rotor core 1042 is cylindrical, and the magnetic steel grooves 1048 are uniformly disposed on the rotor core 1042, so that the rotation speed in the rotation process is stable, and the outer contour of the circular rotor can reduce the windmilling loss in the rotation process of the rotor.
Further, the magnetism isolating grooves 108 are arranged between two adjacent magnetic steel grooves 1048, so that the two adjacent magnetic steel grooves 1048 are communicated through the magnetism isolating grooves 108, leakage magnetic paths are reduced, the defect of weak magnetism of ferrite is overcome, and magnetism collecting effect is improved.
The separation rib 110 is provided on the rotor core 1042 to ensure the basic structural strength, so that the connection between the radial inner structure and the outer structure is generated to ensure the common rotation.
In a specific embodiment, an even number of magnetic steel grooves 1048 are provided, and each magnetic steel groove 1048 can accommodate a magnetic component 1044, so that the magnetic force received during rotation is symmetrical and uniform, and the stability of the rotation speed is ensured. On the basis, the magnetism isolating grooves 108 and the separation ribs 110 are arranged in a staggered mode, so that the gravity center of the whole rotor core 1042 is more stable during rotation.
Furthermore, a 12-slot 8-pole ferrite structure is adopted, each pair of magnetic poles is provided with a magnetism isolating slot 108 close to the inner circle side of the rotor, the magnetic steel slots 1048 connected with each magnetism isolating slot 108 are communicated, and glue is not required to be filled in the magnetism isolating slots 108.
The magnetic pole middle rotor punching 1046 connected with the magnetism isolating slot 108 is closest to the distance d3 between the inner circle end and the outer circle of the rotor, the magnetic steel is closest to the distance d4 between the inner circle end and the outer circle of the rotor, d3 is less than or equal to d4, and the magnetism isolating slot 108 is in an arc structure or a polygonal structure close to the inner side of the rotor. By limiting the distance, the magnetic circuit and the magnetism isolating effect are ensured, and the magnetism isolating groove 108 has a simple arc or polygonal structure, thereby being beneficial to stamping.
For the spacer 110, the width d1, the shortest distance d2 from the end of the magnetic element 1044 near the inner circle to the end of the magnetic isolation slot 108 near the inner circle, satisfies 0.5< d1/d2<1.5. The connecting ribs are limited, so that the strength of the rotor and the magnetism isolating effect are guaranteed, and the efficiency is improved.
Example two
As shown in fig. 1 and fig. 2, the rotor structure 104 provided in this embodiment mainly includes a rotor core 1042 and a magnetic member 1044, where a magnetic steel groove 1048 is provided on the rotor core 1042, so that the magnetic member 1044 is disposed on the rotor core 1042, and thus the rotor structure 104 can be rotated integrally under the action of the stator at the corresponding position. Specifically, the magnetic steel groove 1048 penetrates through two ends of the rotor core 1042 along the axial direction, so that the magnetic piece 1044 in the magnetic steel groove 1048 can rotate under the action of the tangential magnetic field, and it needs to be emphasized that the material of the magnetic piece 1044 in the scheme is ferrite, so that the material can be replaced under the condition that rare earth resources are scarce, and the material cost is saved. It should be noted that, the magnetic performance of the ferrite itself is reduced compared with the conventional rare earth, so that the shape of the magnetic element 1044 needs to be adjusted, specifically, in the radial direction, as shown in fig. 2, the outer width a of the magnetic element 1044 is smaller than the inner width B, that is, the whole body is in a shape with small outside and large inside, which is favorable for increasing the magnetic resistance of the leakage magnetic flux magnetic circuit, reducing the leakage, and improving the anti-demagnetizing capability and the magnetism gathering effect, thereby improving the magnetic steel utilization rate.
Generally, the cross section of the rotor core 1042 is circular, that is, the rotor core 1042 is cylindrical, and the magnetic steel grooves 1048 are uniformly disposed on the rotor core 1042, so that the rotation speed in the rotation process is stable, and the outer contour of the circular rotor can reduce the windmilling loss in the rotation process of the rotor.
The first radial contour line 1050 may be a straight line or a curved line, as shown in fig. 2. Likewise, the second radial contour 1052 may be straight or curved.
In a specific embodiment, for the magnetic member 1044, there are two sidewalls in the circumferential direction, each of which is connected to the radially inner wall, and in the cross-sectional projection, the two sidewalls are projected to form a first circumferential contour 1054 and a second circumferential contour 1056, respectively, which are led from two ends of the first circumferential contour 1050, and it should be emphasized that, since the sidewalls are linear in shape on the projection plane, the sidewalls are in a perpendicular relationship with the rotor core 1042, that is, the extending direction of the sidewalls is extended along the axial direction, so that the whole magnetic member 1044 rotates under better magnetic field force during rotation.
Further, for the two circumferential contour lines, the angle between the two sidewalls of the magnetic element 1044 in the circumferential direction with respect to the rotation axis, that is, the angle θ between the two circumferential contour lines on the projection plane needs to be smaller than 20 °, magnetizing along the tangential direction is beneficial to magnetic focusing, and makes up the shortcoming of weak magnetism of ferrite.
In addition, through limiting the included angle size, the magnetic part adopts the polygon structure, has limited the included angle theta size, and the magnetic part can not go down to separate in the magnetism groove, separates magnetism groove and also need not fill or set up and put the structure, and simple structure separates magnetism effectually.
The relationship between the included angle θ and the back electromotive force coefficient ke is shown in fig. 3.
Still further, when the magnetic component 1044 is mounted to the magnetic steel groove 1048, by limiting the magnetic steel groove 1048 and the two circumferential sides of the magnetic component 1044 in the circumferential direction, the magnetic steel groove 1048 is circumferentially limited for the magnetic component 1044, so as to fix the position of the magnetic component 1044 in the magnetic steel groove 1048 and reduce the circumferential movement during rotation.
The magnetic member 1044 is of a symmetrical structure, specifically, on the cross section of the rotor core 1042, the projection of the magnetic member 1044 is symmetrical, so that the rotor structure 104 is more stable during rotation.
In a specific embodiment, as shown in fig. 5, the rotor core 1042 is mainly formed by stacking a plurality of rotor sheets 1046, which can reduce eddy current loss and facilitate machining.
Example III
As shown in fig. 1, the rotor structure 104 provided in this embodiment mainly includes a rotor core 1042 and a magnetic member 1044, where a magnetic steel groove 1048 is provided on the rotor core 1042, so that the magnetic member 1044 is disposed on the rotor core 1042, and thus the rotor structure 104 can be rotated integrally under the action of the stator at the corresponding position. Specifically, the magnetic steel groove 1048 penetrates through two ends of the rotor core 1042 along the axial direction, so that the magnetic piece 1044 in the magnetic steel groove 1048 can rotate under the action of the tangential magnetic field, and it needs to be emphasized that the material of the magnetic piece 1044 in the scheme is ferrite, so that the material can be replaced under the condition that rare earth resources are scarce, and the material cost is saved. It should be noted that, the magnetic performance of the ferrite itself is reduced compared with the conventional rare earth, so that the shape of the magnetic element 1044 needs to be adjusted, specifically, in the radial direction, the outer width of the magnetic element 1044 is smaller than the inner width, that is, the whole body is in a shape with small outside and large inside, which is favorable for increasing the magnetic resistance of the leakage magnetic circuit, reducing the leakage magnetic, improving the anti-demagnetizing capability and the magnetism gathering effect, and thus improving the utilization ratio of the magnetic steel.
Further, the first radial contour 1050 and the second radial contour 1052 are parallel, which on the one hand facilitates machining and on the other hand, when rotated, the parallel arrangement of the inner and outer contours allows a smoother motor operation.
In addition, although the length of the second radial contour line 1052 on the radially outer side is smaller than the length of the first radial contour line 1050, it is not so small as to secure the necessary magnetic properties, so the lower limit of the ratio of the second radial contour line 1052 and the first radial contour line 1050 is defined, that is, 0.75.
In a particular embodiment, the ratio between the second radial contour 1052 and the first radial contour 1050 is 0.8.
In another particular embodiment, the ratio between the second radial contour 1052 and the first radial contour 1050 is 0.9.
Example IV
As shown in fig. 1 and fig. 2, the rotor structure 104 provided in this embodiment mainly includes a rotor core 1042 and a magnetic member 1044, where a magnetic steel groove 1048 is provided on the rotor core 1042, so that the magnetic member 1044 is disposed on the rotor core 1042, and thus the rotor structure 104 can be rotated integrally under the action of the stator at the corresponding position. Specifically, the magnetic steel groove 1048 penetrates through two ends of the rotor core 1042 along the axial direction, so that the magnetic piece 1044 in the magnetic steel groove 1048 can rotate under the action of the tangential magnetic field, and it needs to be emphasized that the material of the magnetic piece 1044 in the scheme is ferrite, so that the material can be replaced under the condition that rare earth resources are scarce, and the material cost is saved. It should be noted that, the magnetic performance of the ferrite itself is reduced compared with the conventional rare earth, so that the shape of the magnetic element 1044 needs to be adjusted, specifically, in the radial direction, the outer width of the magnetic element 1044 is smaller than the inner width, that is, the whole body is in a shape with small outside and large inside, which is favorable for increasing the magnetic resistance of the leakage magnetic circuit, reducing the leakage magnetic, improving the anti-demagnetizing capability and the magnetism gathering effect, and thus improving the utilization ratio of the magnetic steel.
In addition, on the basis of the above embodiment, external diameter chamfers may be provided at both circumferential ends of the outer side of the magnetic member 1044, so that the magnetic path reluctance of the leakage magnetic flux can be effectively increased, and the leakage magnetic flux can be effectively reduced.
It is understood that the magnetic circuit of the magnetic member 1044 is formed by the inner side and the outer side of the magnetic member 1044 in the radial direction, and the magnetic member 1044 on the outer side in the radial direction is subjected to hole digging treatment on both sides in the circumferential direction thereof, so that the magnetic leakage can be reduced.
Further, the projections of the two outer diameter chamfers on the cross section are defined as linear, namely the first connecting contour 1058 and the second connecting contour 1060, and the two connecting contours are respectively connected with the two ends of the second radial contour 1052, so that the shape of the whole magnetic piece 1044 is more regular, and meanwhile, the projections of the linear form also indicate that the chamfers are cut and extended parallel to the axis, so that the magnetic leakage is reduced on the basis of being convenient to process.
Further, limiting the angles between the first connecting contour 1058 and the second connecting contour 1060, respectively, and the second radial contour 1052 to be less than 30 ° is beneficial to increasing the reluctance of the leakage flux magnetic circuit and reducing the leakage flux.
Further, the angles between the first and second connecting contours 1058, 1060 and the second radial contour 1052 are the same and are each less than 30 °.
Example five
As shown in fig. 7, the motor structure 100 according to the present embodiment includes two parts, namely a stator structure 102 and a rotor structure 104, wherein, for the stator core 1022, when the stator teeth are wound to form the stator windings in the winding slots, the rotor structure 104 can be driven by a normal magnetic field, so as to realize rotation of the rotor structure 104. Specifically, the rotor structure 104 and the stator structure 102 are coaxially disposed, and mainly include two parts, namely a rotor core 1042 and a permanent magnet, and when the stator structure 102 is energized to generate a vector magnetic field, the magnetic member 1044 will rotate under the magnetic action, so as to realize movement of the rotor structure 104.
The axis of the stator core 1022 is collinear with the axis of the rotor core 1042, and the stator teeth and the permanent magnets are disposed about the axis, and generally uniformly disposed.
As shown in fig. 4, the stator core 1022 is formed by combining a plurality of stator laminations 1034 stacked in the axial direction.
Further, for the stator structure 102, the ratio of the inner diameter to the outer diameter is between 0.5 and 0.65, and the motor with the split ratio selected in the range has higher cost performance, is favorable for placing the magnetic steel in a larger space on the rotor side, and improves the magnetic flux and the anti-demagnetizing capability of the magnetic steel. Further, the outer diameter of the stator is 101.15mm, and the inner diameter of the stator is 62.7mm.
Further, as shown in fig. 6, the stator structure 102 mainly includes two parts of a stator core 1022 and a stator winding, and the stator core 1022 includes a stator yoke 1023 and stator teeth 1024, and the stator winding is limited to be wound on the stator teeth 1024 by limiting the stator teeth 1024 to be circumferentially arranged so as to form a magnetic field for driving the rotor structure 104 to rotate.
It should be emphasized that by limiting the ratio of the width of the stator teeth 1024 to the thickness of the stator yoke 1023 to between 1 and 1.5, it is advantageous to ensure a tooth and yoke flux design such that while providing a smooth magnetic circuit, there is some margin, i.e. unsaturation.
In one particular embodiment, the ratio between the number of stator teeth 1024 and the number of magnetic steel slots 1048 of the rotor structure 104 is 3:2.
in another specific embodiment, the ratio between the number of stator teeth 1024 and the number of magnetic steel slots 1048 of the rotor structure 104 is 6:5.
wherein, rated torque of motor is T, and the internal diameter of stator body is Di, and the unit volume torque of rotor is TPV, and satisfies:
5.18×10 -7 ≤T×Di -3 ×TPV -1 ≤1.17×10 -6 ；
5kN•m•m -3 ≤TPV≤45kN•m•m -3 。
wherein, the rated torque T of the motor is N.m, the internal diameter Di of the stator core is mm, and the unit volume torque TPV of the rotor is kN.m.m -3 。
Example six
As shown in fig. 8, the compressor structure 200 according to the present embodiment includes a first housing 202 and a motor structure 100 disposed in the first housing 202, and the motor structure 100 in any of the foregoing embodiments is disposed in the first housing 202, so that the beneficial effects of the motor structure 100 are provided and are not repeated herein.
Example seven
As shown in fig. 9, the refrigeration apparatus 300 according to the present embodiment includes a second housing 302 and a compressor structure 200 disposed in the second housing 302, and the compressor structure 200 according to the fifth embodiment is disposed in the refrigeration apparatus 300, so that the beneficial effects of the compressor structure 200 are provided and are not described herein.
Among them, the refrigerating apparatus 300 includes, but is not limited to, apparatuses having a refrigerating function such as a refrigerator, a freezer, an air conditioner, and the like.
According to the rotor structure, the motor structure, the compressor structure and the refrigeration equipment provided by the application, the utilization effect of ferrite magnetic steel can be enhanced, the magnetic gathering capacity and the anti-demagnetizing capacity are improved, the energy efficiency is further improved, and the motor cost is reduced.
In the present application, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present application, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present application.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present application, and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A rotor structure, comprising:
the rotor core is provided with a plurality of magnetic steel grooves, and each magnetic steel groove penetrates through two end faces of the rotor core along the axial direction;
the magnetic piece is arranged in the magnetic steel groove;
the magnetic pieces are ferrite, one ends of at least two adjacent magnetic steel grooves close to the axis of the rotor core are communicated, and a gap exists between the magnetic pieces and one end of the magnetic steel grooves close to the axis of the rotor core;
the magnetic isolation grooves are arranged at one ends of two adjacent magnetic steel grooves, which are close to the axis of the rotor core, and are communicated with the two adjacent magnetic steel grooves;
the magnetic piece is connected with two ends of the first radial contour line along a first circumferential contour line and a second circumferential contour line corresponding to the side walls of two sides of the circumference of the rotor core respectively;
an included angle between the first circumferential contour line and the second circumferential contour line is smaller than 20 degrees;
on the cross section of the rotor core, the first radial contour line of the magnetic part on the radial inner side of the rotor core is parallel to the second radial contour line on the radial outer side, and the ratio between the second radial contour line and the first radial contour line is in the range of 0.75-1;
the rotor structure further includes:
an outer diameter chamfer provided at both ends of the radial outer side of the magnetic member in the circumferential direction of the rotor core;
on the cross section of the rotor core, the projections of the two outer diameter chamfers are a first connecting contour line and a second connecting contour line respectively;
the first connecting contour line and the second connecting contour line are respectively connected with the second radial contour line, and an included angle between the first connecting contour line and the second radial contour line is smaller than 30 degrees, or an included angle between the second connecting contour line and the second radial contour line is smaller than 30 degrees.
2. The rotor structure according to claim 1, characterized by comprising:
and the separation ribs are arranged on the rotor core, and the separation ribs are arranged between at least two adjacent magnetic steel grooves.
3. The rotor structure according to claim 2, wherein the number of the magnetic steel grooves is an even number, and the magnetic separation grooves and the separation ribs are arranged alternately in the circumferential direction of the rotor core.
4. A rotor structure according to any one of claims 1 to 3, wherein in the circumferential direction of the rotor core, side walls of the magnetic steel grooves are fitted with side walls of the magnetic members on both sides in the circumferential direction of the rotor core.
5. A rotor structure according to any one of claims 1 to 3, wherein the projection of the magnetic member on the cross section of the rotor core is symmetrical.
6. An electric motor structure, comprising:
a stator structure;
a rotor structure as claimed in any one of claims 1 to 5, coaxially arranged with the stator structure and rotatable relative thereto.
7. The electric machine structure according to claim 6, characterized in that said stator structure comprises in particular:
the stator comprises a stator core and a stator winding, wherein the stator core comprises a stator yoke and a plurality of stator convex teeth which extend inwards from the stator yoke along the radial direction, the plurality of stator convex teeth are circumferentially distributed around the axis of the stator core, and the stator winding is wound on the stator convex teeth;
the ratio of the width of the stator convex teeth to the thickness of the stator yoke is 1-1.5.
8. The motor structure according to claim 7, wherein,
the ratio between the number of the stator teeth and the number of the magnetic steel grooves of the rotor structure is 3:2; or (b)
The ratio between the number of the stator teeth and the number of the magnetic steel grooves of the rotor structure is 6:5.
9. a compressor structure, comprising:
a first housing;
the motor structure according to claim 7 or 8, provided in the first housing.
10. A refrigeration appliance, comprising:
a second housing;
the compressor structure of claim 9, disposed within said second housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111299000.2A CN114039435B (en) | 2021-11-04 | 2021-11-04 | Rotor structure, motor structure, compressor structure and refrigeration equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111299000.2A CN114039435B (en) | 2021-11-04 | 2021-11-04 | Rotor structure, motor structure, compressor structure and refrigeration equipment |
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| CN114039435A CN114039435A (en) | 2022-02-11 |
| CN114039435B true CN114039435B (en) | 2023-10-03 |
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| CN110912297A (en) * | 2019-12-11 | 2020-03-24 | 安徽美芝精密制造有限公司 | Motor and compressor |
| CN111384804A (en) * | 2019-09-26 | 2020-07-07 | 广东威灵电机制造有限公司 | Motor and household appliance |
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| EP1471621A3 (en) * | 2003-04-24 | 2005-12-14 | Minebea Co., Ltd. | Rotor element for an electrical motor |
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| JP2007151332A (en) * | 2005-11-29 | 2007-06-14 | Mitsubishi Heavy Ind Ltd | Ipm motor |
| CN105990920A (en) * | 2015-02-12 | 2016-10-05 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor iron core and motor having the same |
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| CN114039435A (en) | 2022-02-11 |
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