CN216056531U - Rotor structure, motor structure, compressor structure and refrigeration plant - Google Patents

Abstract

The embodiment of the utility model provides a rotor structure, a motor structure, a compressor structure and refrigeration equipment, wherein the rotor structure comprises: the rotor core is provided with a plurality of magnetic steel grooves, and each magnetic steel groove penetrates through two axial end faces of the rotor core; the magnetic pieces are arranged in the magnetic steel grooves and are not parallel along the side walls of the two circumferential sides of the rotor core; the magnetic part is ferrite, and on the cross section of the rotor core, a first radial contour line of the magnetic part on the radial inner side of the rotor core is larger than a second radial contour line on the radial outer side. According to the technical scheme, the utilization effect of the ferrite magnetic steel can be enhanced, the magnetic gathering capacity and the demagnetization resistance are improved, the energy efficiency of the compressor is further improved, and the cost of the motor is reduced.

Description

Rotor structure, motor structure, compressor structure and refrigeration plant

Technical Field

The utility model relates to the technical field of motors, in particular to a rotor structure, a motor structure, a compressor structure and refrigeration equipment.

Background

The magnet steel of current motor selects rare earth material to make production usually for use, however along with the restriction of rare earth resource output, some motors select the ferrite for use to replace, and the magnetic property of ferrite is weak compared in the magnet steel that rare earth material made, can't satisfy the user demand of motor.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art or the related art.

In view of this, embodiments of the first aspect of the present invention provide a rotor structure.

Embodiments of a second aspect of the utility model provide an electric machine structure.

Embodiments of a third aspect of the present invention provide a compressor structure.

Embodiments of a fourth aspect of the present invention provide a refrigeration apparatus.

In order to achieve the above object, an embodiment of a first aspect of the present invention 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 axial end faces of the rotor core; the magnetic pieces are arranged in the magnetic steel grooves and are not parallel along the side walls of the two sides of the rotor core in the circumferential direction; the magnetic part is ferrite, and on the cross section of the rotor core, a first radial contour line of the magnetic part on the radial inner side of the rotor core is larger than a second radial contour line on the radial outer side.

According to the rotor structure provided by the embodiment of the first aspect of the utility model, the rotor structure mainly comprises a rotor core and a magnetic part, wherein the rotor core is provided with a magnetic steel groove for the magnetic part to be arranged on the rotor core, so that the rotor structure can integrally rotate under the action of a stator at a corresponding position. Specifically, the magnet steel groove runs through rotor core's both ends along the axial to the effect that the magnetic part in the magnet steel groove can receive tangential magnetic field takes place to rotate, need emphasize, the material of the magnetic part in this scheme is the ferrite, can replace under the rare circumstances of tombarthite resource, save material cost, in addition, owing to selected the ferrite, difficult emergence demagnetization when high temperature operation, ferrite magnetism is weak, the weak magnetic current that high-speed weak magnetism needs is lower, be favorable to motor high-speed efficiency to improve. It should be noted that, the magnetic property of ferrite self compares and to descend in traditional tombarthite, so need adjust the shape of magnetic part, specifically be, in radial direction, the outside width of magnetic part is less than inboard width, also is whole to be the shape of outer little interior big, is favorable to increasing leakage magnetic flux magnetic circuit magnetic resistance, reduces the magnetic leakage, improves anti demagnetization ability and gathers the magnetism effect to improve the magnet steel utilization ratio.

Generally, rotor core's cross section is circular, and also rotor core is whole to be cylindricly, and a plurality of magnetic steel grooves evenly set up on rotor core to make the rotational speed at the rotation in-process comparatively steady, circular rotor outline can reduce the windmilling loss of rotor rotation in-process.

The first radial contour line can be a straight line or a curve. Similarly, the second radial contour may be a straight line or a curved line.

In the technical scheme, the first radial contour line is parallel to the second radial contour line, and the ratio range between the second radial contour line and the first radial contour line is 0.75-1.

In this technical scheme, through restricting that first radial contour line and second radial contour line are parallel, the processing of being convenient for on the one hand, on the other hand when rotating, parallel arrangement's inside and outside contour line can make the motor operation more steady.

It is emphasized that although the length of the radially outer second radial contour is smaller than the length of the first radial contour, it cannot be too small to guarantee the necessary magnetic properties, so that the lower limit of the ratio of the second radial contour to the first radial contour is defined, namely 0.75.

In the above technical solution, the magnetic member is connected to both ends of the first radial contour line along the first and second circumferential contour lines corresponding to the side walls on both sides of the rotor core in the circumferential direction.

In the technical scheme, for the magnetic part, two side walls exist in the circumferential direction, each side wall is connected with the inner wall which is radially close to the inner wall, in the projection of the cross section, the two side walls are respectively projected to form a first circumferential contour line and a second circumferential contour line, the two circumferential contour lines are led out from two ends of the first radial contour line, and it needs to be emphasized that the side walls are in a perpendicular relation with the rotor core due to the fact that the shape of the side walls on the projection plane is linear, namely the extending direction of the side walls extends along the axial direction, so that the whole magnetic part can be better rotated under the action of magnetic field force when the magnetic part rotates.

In the above technical solution, an included angle between the first circumferential contour line and the second circumferential contour line is less than 20 °.

In the technical scheme, the included angle of the two side walls of the magnetic part in the circumferential direction relative to the rotating shaft is limited, namely, on the projection surface, the included angle formed by the two circumferential contour lines is magnetized in the tangential direction, so that the magnetism is gathered, and the defect that the ferrite is weak in magnetism is overcome.

Among the above-mentioned technical scheme, in rotor core's circumferential direction, the lateral wall in magnetic steel groove and the lateral wall of magnetic part along rotor core's circumference both sides are laminated mutually.

In this technical scheme, when installing the magnetic part to the magnet steel groove, through the restriction on the circumferential direction, the circumference both sides homogeneous phase laminating of magnet steel groove and magnetic part to it is spacing to make the magnet steel groove carry out circumference for the magnetic part, and the position of fixed magnetic part in the magnet steel groove reduces the circumferential displacement when rotating.

In the above technical solution, further comprising: and the outer diameter chamfers are arranged at two ends of the radial outer side of the magnetic part along the circumferential direction of the rotor core.

In this technical scheme, set up the external diameter chamfer respectively through the circumference both ends in the outside of magnetic part, can effectively increase the magnetic circuit reluctance of magnetic leakage flux, can effectively reduce the magnetic leakage.

It is understood that the magnetic path of the magnetic member is formed by the inner and outer sides of the magnetic member in the radial direction, and the magnetic member on the radially outer side is subjected to the boring process on both sides in the circumferential direction, thereby reducing the leakage flux.

In the technical scheme, on the cross section of the rotor core, the projections of the two outer diameter chamfers are respectively a first connecting contour line and a second connecting contour line; wherein the first connection contour line and the second connection contour line are respectively connected with the second radial contour line.

In this technical scheme, through restricting the projection of two external diameter chamfers on the cross section for the line type, be first connection profile line and second connection profile line respectively to link to each other two connection profile lines respectively with the both ends of the radial profile line of second, make the shape of whole magnetism spare comparatively regular, the projection of line type also explains that the chamfer is to extend the excision parallel to the axis simultaneously, on the basis of the processing of being convenient for, reduces the magnetic leakage.

In the technical scheme, an included angle between the first connecting contour line and the second radial contour line is less than 30 degrees; or the angle between the second connecting contour and the second radial contour is smaller than 30 deg.

In the technical scheme, the included angle between the first connecting contour line and the second connecting contour line and the included angle between the second connecting contour line and the second radial contour line are respectively limited to be smaller than 30 degrees, the magnetic resistance of the magnetic flux leakage magnetic circuit is favorably increased, and the magnetic flux leakage is reduced.

Further, the included angles between the first connecting contour line and the second radial contour line are the same and are both smaller than 30 °.

In the technical scheme, the projection of the magnetic part on the cross section of the rotor core is symmetrical.

In this technical scheme, be symmetrical structure through the restriction magnetic part, specifically be on rotor core's cross section, the projection of magnetic part is the symmetry form for rotor structure is more steady when rotating.

Among the above-mentioned technical scheme, rotor core includes a plurality of rotor punching, and a plurality of rotor punching are along rotor core's axial range upon range of setting.

In this technical scheme, rotor core mainly sets up through a plurality of rotor punching and forms, reducible eddy current loss on the one hand, and on the other hand is also convenient for process.

According to the second aspect of the utility model, the motor structure comprises a stator structure; the rotor structure in any of the above embodiments is coaxially disposed with the stator structure, and the rotor structure is capable of rotating relative to the stator structure.

The motor structure provided by the utility model comprises a stator structure and a rotor structure, wherein for a stator core, when the stator teeth are wound to arrange the stator winding in the winding slot, the normal magnetic field driving effect can be realized on the rotor structure, and the rotation of the rotor structure is further realized. Specifically, rotor structure and stator structure coaxial setting mainly include two parts of rotor core and permanent magnet, and when stator structure circular telegram produced vector magnetic field, the magnetic part can take place to rotate under the magnetic action to realize rotor structure's removal.

It should be noted that the axis of the stator core is collinear with the axis of the rotor core, and the stator teeth and 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 of the stator structure is between 0.5 and 0.65, the motor with the split ratio in the range has higher cost performance, larger space for placing the magnetic steel on the rotor side is facilitated, and the magnetic flux and the demagnetization resistance of the magnetic steel are improved. Further, the stator outer diameter D1 was 101.15mm and the stator inner diameter Di1 was 62.7 mm.

Among the above-mentioned technical scheme, stator structure specifically includes: the stator core comprises a stator yoke and a plurality of stator convex teeth extending inwards from the stator yoke along the radial direction, the plurality of stator convex teeth are distributed circumferentially around the axis of the stator core, and the stator winding is wound on the stator convex teeth; wherein, the ratio range between the width of the stator convex tooth and the thickness of the stator yoke is 1-1.5.

In the technical scheme, the stator structure mainly comprises a stator core and a stator winding, the stator core comprises a stator yoke and stator convex teeth, the stator convex teeth are limited to be arranged along the circumferential direction, and the stator winding is limited to be wound on the stator convex teeth so as to form a magnetic field for driving the rotor structure to rotate.

It should be emphasized that by limiting the ratio of the width of the stator teeth to the thickness of the stator yoke, it is beneficial to ensure the flux design of the teeth and the yoke, so that while providing a smooth magnetic path, there is also a certain margin, i.e. an unsaturated state.

Among the above-mentioned technical scheme, the ratio between the quantity of stator lobe and the quantity of rotor structure's magnet steel groove is 3: 2; or the ratio of the number of the stator convex teeth to the number of the magnetic steel grooves of the rotor structure is 6: 5.

in this solution, for the type of motor structure, by defining a ratio of 3: 2 or 6: 5, the problems of weaker magnetism, small iron loss and larger copper loss of the ferrite used as a magnetic part can be greatly solved, and the selection of the multi-slot pole structure is more favorable for reducing the copper loss of the winding.

An embodiment of a third aspect of the present invention 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 invention, the compressor structure includes the first housing and the motor structure disposed in the first housing, and the motor structure in the embodiment of the second aspect is disposed in the compressor structure, so that the compressor structure has the beneficial effects of the motor structure, and details are not repeated herein.

An embodiment of a fourth aspect of the present invention provides a refrigeration apparatus comprising: a second housing; the compressor according to 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 invention, the refrigeration equipment includes the second housing and the compressor structure disposed in the second housing, and the compressor structure in the embodiment of the third aspect is disposed in the refrigeration equipment, so that the refrigeration equipment has the beneficial effects of the compressor structure, and details are not repeated here.

The refrigeration device includes, but is not limited to, a refrigerator, an ice chest, an air conditioner, and other devices having a refrigeration function.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

FIG. 1 shows a schematic structural view of a rotor structure according to an embodiment of the utility model;

FIG. 2 shows a schematic structural diagram of a magnetic member according to an embodiment of the present invention;

FIG. 3 is a graphical representation of back EMF coefficients versus angles between first and second circumferential contour lines in an embodiment in accordance with the utility model;

fig. 4 shows a schematic structural view of a stator core according to an embodiment of the present invention;

FIG. 5 illustrates a schematic structural view of a rotor core according to an embodiment of the present invention;

FIG. 6 shows a schematic structural diagram of a stator structure according to an embodiment of the utility model;

fig. 7 shows a structural schematic of a motor structure according to an embodiment of the utility model;

FIG. 8 is a schematic structural view illustrating a compressor structure according to an embodiment of the present invention;

fig. 9 shows a schematic configuration of a refrigeration apparatus according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part 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 lobes; 1034: stator punching sheets; 104: a rotor structure; 1042: a rotor core; 1044: a magnetic member; 1046: rotor punching sheets; 1048: a magnetic steel groove; 1050: a first radial profile; 1052: a second radial profile; 1054: a first circumferential contour line; 1056: a second circumferential contour line; 1058: a first connecting contour line; 1060: a second connecting contour line; 200: a compressor structure; 202: a first housing; 300: a refrigeration device; 302: a second housing.

Detailed Description

In order that the above objects, features and advantages of the embodiments of the present invention can be more clearly understood, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

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 present invention may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited to the specific embodiments disclosed below.

Some embodiments according to the utility model are described below with reference to fig. 1 to 9.

Example one

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, wherein a magnetic steel slot 1048 is disposed on the rotor core 1042 to allow the magnetic member 1044 to be disposed on the rotor core 1042, so that the rotor structure 104 can be integrally rotated under the action of a stator at a corresponding position. Specifically, magnet steel groove 1048 runs through the both ends of rotor core 1042 along the axial to in magnet steel groove 1048 magnetic part 1044 can receive tangential magnetic field's effect and take place to rotate, it needs to emphasize that the material of magnetic part 1044 in this scheme is the ferrite, can replace under the rare circumstances of rare earth resource, save material cost, in addition, owing to selected the ferrite, difficult emergence demagnetization when high temperature operation, ferrite magnetism is weak, the weak magnetic current that high-speed weak magnetism needs is lower, be favorable to the improvement of motor high-speed efficiency. It should be noted that, the magnetic performance of the ferrite itself is reduced compared with the conventional rare earth, so the shape of the magnetic component 1044 needs to be adjusted, specifically, in the radial direction, as shown in fig. 2, the outer width a of the magnetic component 1044 is smaller than the inner width B, that is, the whole is in a shape of small outside and large inside, which is beneficial to increasing the magnetic resistance of the magnetic leakage flux magnetic circuit, reducing the magnetic leakage, and improving the demagnetization resistance and the magnetic convergence 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 integrally cylindrical, and the plurality of magnetic steel slots 1048 are uniformly arranged on the rotor core 1042, so that the rotating speed in the rotating process is relatively stable, and the wind abrasion loss in the rotating process of the rotor can be reduced by the outer contour of the circular rotor.

As shown in fig. 2, the first radial contour line 1050 may be a straight line or a curved line. Similarly, the second radial profile 1052 may be straight or curved.

In a specific embodiment, for the magnetic member 1044, there are two sidewalls in the circumferential direction, each sidewall is connected to the radially inner wall, and in the projection of the cross section, the two sidewalls respectively project to form a first circumferential contour line 1054 and a second circumferential contour line 1056, which are led out from two ends of the first radial contour line 1050, it should be emphasized that, since the sidewall has a linear shape on the projection plane, the sidewall is in a perpendicular relationship with the rotor core 1042, that is, the extending direction of the sidewall extends along the axial direction, so that the entire magnetic member 1044 can rotate under better magnetic field force when rotating.

Further, for two circumferential contour lines, the included angle between the two side walls of the magnetic member 1044 in the circumferential direction and the rotating shaft, that is, the included angle θ formed by the two circumferential contour lines on the projection surface needs to be smaller than 20 °, and tangential magnetization is favorable for magnetic concentration, so that the defect that the ferrite is weak in magnetism is overcome.

The relationship between the angle θ and the back electromotive force coefficient ke is shown in fig. 3.

Further, when installing magnetism spare 1044 to magnet steel groove 1048, through the restriction in circumferential direction, the circumference both sides homogeneous phase laminating of magnet steel groove 1048 and magnetism spare 1044 to make magnet steel groove 1048 carry out circumference spacing for magnetism spare 1044, the position of fixed magnetism spare 1044 in magnet steel groove 1048 reduces the circumferential displacement when rotating.

The magnetic members 1044 are of a symmetrical structure, and specifically, on the cross section of the rotor core 1042, the projections of the magnetic members 1044 are 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 laminations 1046, which can reduce eddy current loss and facilitate processing.

Example two

As shown in fig. 1, the rotor structure 104 provided in this embodiment mainly includes a rotor core 1042 and a magnetic member 1044, wherein the rotor core 1042 is provided with a magnetic steel slot 1048 for the magnetic member 1044 to be disposed on the rotor core 1042, so that the rotor structure 104 can integrally rotate under the action of a stator at a corresponding position. Specifically, magnet steel groove 1048 runs through the both ends of rotor core 1042 along the axial, so that magnetic part 1044 in magnet steel groove 1048 can receive the effect of tangential magnetic field and take place to rotate, it needs to emphasize, the material of magnetic part 1044 in this scheme is the ferrite, can replace under the rare circumstances of rare earth resource, save material cost, in addition, owing to selected the ferrite, can utilize its characteristic, satisfy the anti demagnetization's of high temperature demand, difficult emergence demagnetization when high temperature operation, ferrite magnetism is weak, the weak magnetic current that high-speed weak magnetism needs is lower, be favorable to the improvement of motor high-speed efficiency. It should be noted that, the magnetic performance of ferrite itself can be reduced compared with traditional rare earth, so need adjust the shape of magnetic part 1044, specifically be, in radial direction, the outside width of magnetic part 1044 is less than the inboard width, also is whole be the shape of outer little big-end-up, is favorable to increasing leakage magnetic flux magnetic circuit magnetic resistance, reduces the magnetic leakage, improves anti demagnetization ability and gathers the magnetism effect to improve the magnet steel utilization ratio.

Further, the first radial contour line 1050 is parallel to the second radial contour line 1052, so that the processing is convenient, and when the motor rotates, the parallel arrangement of the inner contour line and the outer contour line enables the motor to operate more stably.

Further, while the length of the radially outer second radial profile 1052 is less than the length of the first radial profile 1050, it cannot be too small to ensure the necessary magnetic performance, so the lower limit of the ratio of the second radial profile 1052 to the first radial profile 1050 is defined, namely 0.75.

In a particular embodiment, the ratio between the second radial profile 1052 and the first radial profile 1050 is 0.8.

In another specific embodiment, the ratio between the second radial profile 1052 and the first radial profile 1050 is 0.9.

EXAMPLE III

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, wherein a magnetic steel slot 1048 is disposed on the rotor core 1042 to allow the magnetic member 1044 to be disposed on the rotor core 1042, so that the rotor structure 104 can be integrally rotated under the action of a stator at a corresponding position. Specifically, magnet steel groove 1048 runs through rotor core 1042's both ends along the axial, so that magnetic part 1044 in magnet steel groove 1048 can receive tangential magnetic field's effect and take place to rotate, it needs to emphasize, the material of magnetic part 1044 in this scheme is the ferrite, can replace under the rare circumstances of rare earth resource, save material cost, in addition, owing to selected the ferrite, usable its characteristic, difficult emergence demagnetization when high temperature operation, ferrite magnetism is weak, the weak magnetic current that high-speed weak magnetism needs is lower, be favorable to motor high-speed efficiency to improve. It should be noted that, the magnetic performance of the ferrite itself may be reduced compared with the conventional rare earth, so the shape of the magnetic member 1044 needs to be adjusted, specifically, in the radial direction, the outer width of the magnetic member 1044 is smaller than the inner width, that is, the whole is in a shape of small outside and large inside, which is beneficial to increasing the magnetic resistance of the magnetic flux leakage magnetic circuit and reducing the magnetic flux leakage, thereby on the basis of ensuring the demagnetization resistance, making up the weak magnetic defect of the ferrite itself and improving the magnetic convergence effect.

In addition, on the basis of the above embodiments, outer diameter chamfers may be further provided at both circumferential ends of the outer side of the magnetic member 1044, so that the magnetic path reluctance of the leakage flux may be effectively increased, and the leakage flux may be effectively reduced.

It is understood that the magnetic paths of the magnetic members 1044 are formed by the inner and outer sides of the magnetic members 1044 in the radial direction, and both sides of the magnetic member 1044 in the circumferential direction are bored in the radial direction, so that the magnetic flux leakage can be reduced.

Furthermore, the projections of the two outer diameter chamfers on the cross section are limited to be linear shapes, namely a first connecting contour line 1058 and a second connecting contour line 1060, and the two connecting contour lines are respectively connected with two ends of the second radial contour line 1052, so that the shape of the whole magnetic part 1044 is regular, and meanwhile, the projections of the linear shapes also indicate that the chamfers extend and are cut off in parallel with the axis, and magnetic leakage is reduced on the basis of convenience in processing.

Furthermore, the included angle between the first connecting contour line 1058 and the second connecting contour line 1060 and the second radial contour line 1052 is limited to be less than 30 degrees, which is beneficial to increasing the magnetic resistance of the leakage magnetic flux magnetic circuit and reducing the leakage magnetic flux.

Further, the angles between the first connecting contour line 1058 and the second connecting contour line 1060 and the second radial contour line 1052 are the same and are both less than 30 °.

Example four

As shown in fig. 7, the present embodiment proposes a motor structure 100, which includes two parts, namely a stator structure 102 and a rotor structure 104, wherein, for a stator core 1022, when winding the stator teeth to arrange the stator windings in the winding slots, the normal magnetic field driving function can be performed on the rotor structure 104, so as to realize the rotation of the rotor structure 104. Specifically, the rotor structure 104 and the stator structure 102 are coaxially disposed, and mainly include 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 rotates under the magnetic action, thereby realizing the movement of the rotor structure 104.

It should be noted that 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 arranged around the axis and are generally uniformly arranged.

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 in the range has higher cost performance, which is beneficial to placing magnetic steel in a larger space on the rotor side and improving the magnetic flux and the demagnetization resistance of the magnetic steel. Further, the stator outer diameter was 101.15mm, and the stator inner diameter was 62.7 mm.

Further, as shown in fig. 6, stator structure 102 mainly includes two portions of stator core 1022 and stator windings, stator core 1022 in turn includes stator yoke 1023 and stator teeth 1024, and is formed by constraining stator teeth 1024 to be circumferentially arranged and constraining stator windings to wind on stator teeth 1024 so as to form a magnetic field for driving rotor structure 104 to rotate.

As shown in fig. 4, the stator core 1022 is formed by combining a plurality of axially stacked stator laminations 1034.

It is emphasized that by limiting the ratio of the width of the stator teeth 1024 to the thickness of the stator yoke 1023 to 1 to 1.5, it is advantageous to ensure a tooth and yoke flux design such that while providing a clear magnetic path, there is also some margin, i.e., an unsaturated state.

In a specific embodiment, the ratio between the number of stator lobes 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 lobes 1024 and the number of magnetic steel slots 1048 of the rotor structure 104 is 6: 5.

wherein, the 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 expressed in the unit of N.m, the inner diameter Di of the stator core is expressed in the unit of mm, and the unit volume torque TPV of the rotor is expressed in the unit of kN.m.m^-3。

EXAMPLE five

As shown in fig. 8, a compressor structure 200 provided in this 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 embodiments is disposed in the first housing 202, so that the compressor structure has the beneficial effects of the motor structure 100, and details thereof are not repeated.

EXAMPLE six

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 refrigeration apparatus 300 is provided with the compressor structure 200 according to the fifth embodiment, so that the refrigeration apparatus has the beneficial effects of the compressor structure 200, and the details are not repeated herein.

The refrigeration device 300 includes, but is not limited to, a refrigerator, an ice chest, an air conditioner, and other devices having a refrigeration function.

According to the rotor structure, the motor structure, the compressor structure and the refrigeration equipment provided by the utility model, the utilization effect of the ferrite magnetic steel can be enhanced, the magnetic gathering capacity and the demagnetization resistance are improved, the energy efficiency of the compressor is further improved, and the motor cost is reduced.

In the present invention, the terms "first", "second", and "third" 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 limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means 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 utility model. In this specification, the schematic representations of the terms used above 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 invention, and is not intended to limit the present invention, and various modifications and changes will occur to 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 (15)

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 axial end faces of the rotor core;

the magnetic pieces are arranged in the magnetic steel grooves and are not parallel along the side walls of the two circumferential sides of the rotor iron core;

the magnetic part is ferrite, and the magnetic part is in on rotor core's the cross section first radial contour line of rotor core's radial inboard is greater than the second radial contour line that is located the radial outside.

2. The rotor structure according to claim 1, wherein the first radial profile line is parallel to the second radial profile line, and a ratio between the second radial profile line and the first radial profile line is in a range of 0.75 to 1.

3. The rotor structure according to claim 1, wherein the magnetic member is connected to both ends of the first radial contour line along a first circumferential contour line and a second circumferential contour line corresponding to the side walls on both sides in the circumferential direction of the rotor core.

4. A rotor structure according to claim 3, characterised in that the angle between the first and the second circumferential contour lines is less than 20 °.

5. The rotor structure according to claim 1, wherein, in the circumferential direction of the rotor core, the side walls of the magnetic steel slots are attached to the side walls of the magnetic members on both sides in the circumferential direction of the rotor core.

6. The rotor structure according to any one of claims 1 to 5, further comprising:

and the outer diameter chamfers are arranged at two ends of the radial outer side of the magnetic part along the circumferential direction of the rotor core.

7. The rotor structure according to claim 6, wherein projections of the two outer diameter chamfers are a first connecting contour line and a second connecting contour line, respectively, on a cross section of the rotor core;

wherein the first connecting contour line and the second connecting contour line are respectively connected with the second radial contour line.

8. The rotor structure according to claim 7,

the included angle between the first connecting contour line and the second radial contour line is less than 30 degrees; or

The second connecting contour line and the second radial contour line form an included angle smaller than 30 degrees.

9. The rotor structure according to any one of claims 1 to 5, wherein a projection of the magnetic member on a cross section of the rotor core is symmetrical.

10. The rotor structure according to claim 1, wherein the rotor core includes a plurality of rotor sheets, and the plurality of rotor sheets are stacked in an axial direction of the rotor core.

11. An electric machine construction, comprising:

a stator structure;

a rotor structure as claimed in any one of claims 1 to 10, arranged coaxially with the stator structure, and rotatable relative to the stator structure.

12. The electric machine structure according to claim 11, characterized in that the stator structure comprises in particular:

the stator core comprises a stator yoke and a plurality of stator convex teeth extending inwards from the stator yoke in the radial direction, the plurality of stator convex teeth are distributed circumferentially 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 ranges from 1 to 1.5.

13. The electric machine structure according to claim 12,

the ratio of the number of the stator convex teeth to the number of the magnetic steel grooves of the rotor structure is 3: 2; or

The ratio of the number of the stator convex teeth to the number of the magnetic steel grooves of the rotor structure is 6: 5.

14. a compressor structure, comprising:

a first housing;

the electric machine structure of any of claims 11 to 13, disposed within the first housing.

15. A refrigeration apparatus, comprising:

a second housing;

the compressor structure of claim 14, disposed within said second shell.

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