Motor, compressor and refrigeration equipment
By designing reasonable stator slots and rotor components in the motor to balance the iron and copper losses of the motor, the problems of low motor efficiency and poor heat dissipation performance are solved, and more efficient and reliable motor performance is achieved.
Patent Information
- Application Number
- CN202421869070.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-08-02
AI Technical Summary
It is difficult for existing motors to achieve an ideal balance between iron and copper losses, resulting in low motor efficiency, unstable operation, poor heat dissipation performance, and affect service life.
By designing the stator parts and rotor parts of the motor, including the stator punching piece of the stator core and the mounting groove on the rotor core, the area, number of stator grooves, the radius of the punching piece and the number of poles of the rotor parts, ensuring the balance between iron and copper losses.
It achieves an effective balance between iron and copper losses of the motor, improves the overall efficiency of the motor, improves the heat dissipation performance, and extends the service life.
Smart Images
Figure CN222928143U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, and particularly relates to a motor, a compressor and a refrigeration device. Background Art
[0002] With the rapid development of industrial automation and intelligent manufacturing, as the core component of the driving device, the performance of the motor directly affects the efficiency and reliability of the entire system.
[0003] At present, the losses of the motor mainly include iron loss and copper loss. However, due to the limitations of the motor design and manufacturing process, it is often difficult to achieve an ideal balance between the iron loss and the copper loss. This imbalance not only reduces the overall efficiency of the motor, but also causes the motor to operate unstably, have poor heat dissipation performance, and even affect the service life of the motor. Summary of the Utility Model
[0004] The main purpose of the utility model is to provide a motor, a compressor and a refrigeration device, aiming to balance the iron loss and copper loss of the motor to improve the motor efficiency.
[0005] To achieve the above purpose, the motor proposed by the utility model includes a stator component and a rotor component arranged inside the stator component;
[0006] The stator component includes a stator core, the stator core includes a plurality of stator punching sheets stacked along its axial direction, the stator punching sheet includes a stator yoke and a plurality of stator teeth arranged inside the stator yoke, the maximum radius and the minimum radius of the stator punching sheet are R 1 and R 2 , respectively, the stator yoke and two adjacent stator teeth enclose a stator slot, the area of the stator slot is S, the number of the stator slots is Q, and the number of poles of the rotor component is P.
[0007] In one embodiment
[0008] In one embodiment, 110mm 2 ≤S≤190mm 2 .
[0009] In one embodiment, 40mm≤R 1 ≤70mm.
[0010] In one embodiment, 24mm≤R 2 ≤35mm.
[0011] In one embodiment, the thickness of the stator punching sheet is t.
[0012] In one embodiment, the outer contour of the stator yoke is any one of a circular shape and a special shape.
[0013] In one embodiment, the rotor component includes a rotor core, and a plurality of mounting grooves are distributed along the circumferential direction of the rotor core. The mounting grooves are used to fix permanent magnets. The permanent magnets include at least one, and the total length thereof is L 1 , and the width of the permanent magnet is L 2 ,
[0014] In one embodiment
[0015] In one embodiment, 14mm ≤ L 1 ≤ 23mm.
[0016] In one embodiment, 1.1mm ≤ L 2 ≤ 1.8mm.
[0017] In one embodiment, 15 ≤ Q ≤ 18.
[0018] In one embodiment, 10 ≤ P ≤ 12.
[0019] In one embodiment, between the number of stator slots Q, the number of poles p of the rotor component, and the number of motor phases m, the following is satisfied: 0 < Q / mP < 1.
[0020] The present utility model also provides a compressor, which includes the motor as described above.
[0021] The present utility model also provides a refrigeration device, which includes the compressor as described above.
[0022] In the technical solution of the present utility model, the motor includes a stator component and a rotor component. Among them, the stator component includes a stator core, and a plurality of stator slots are formed on the stator punching sheet of the stator core. By defining the area S of the stator slot, the number Q of stator slots, the maximum radius R of the stator punching sheet 1 , the minimum radius R of the stator punching sheet 2 and the number of poles P of the rotor component satisfy: In this way, the area of the stator slot is reasonably designed, which can not only ensure that enough stator windings can be accommodated in the stator slot, reduce copper loss, but also ensure the material usage of the stator punching sheet, guarantee the flow of magnetic flux in the stator core in the motor, reduce iron loss, and balance the iron loss and copper loss of the motor. According to empirical theory, when the copper and iron losses of the permanent magnet synchronous motor are balanced, the motor efficiency is the highest. Secondly, the heat dissipation performance of the motor can be improved, thereby reducing the efficiency reduction and life shortening caused by motor overheating. Description of the Drawings
[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.
[0024] Figure 1 Structural schematic diagram of an embodiment of the motor provided by the present invention;
[0025] Figure 2 For Figure 1 Structural schematic diagram of an embodiment of the stator punching sheet of the stator component in
[0026] Figure 3 For Figure 1 Structural schematic diagram of another embodiment of the stator punching sheet of the stator component in
[0027] Figure 4 For Figure 1 Structural schematic diagram of an embodiment of the rotor punching sheet of the rotor component in 1 = a;
[0028] Figure 5 For Figure 1 Structural schematic diagram of another embodiment of the rotor punching sheet of the rotor component in 1 = a + b;
[0029] Figure 6 For Figure 1 Structural schematic diagram of still another embodiment of the rotor punching sheet of the rotor component in 1 = a + b + c;
[0030] Figure 7 Structural schematic diagram of an embodiment of the compressor provided by the present invention;
[0031] Figure 8 Relationship diagram of motor loss and efficiency;
[0032] Figure 9 Relationship diagram of the thickness of the stator punching sheet and the motor efficiency;
[0033] Figure 10 Relationship diagram of the area of the permanent magnet on the rotor core and the motor efficiency.
[0034] Explanation of the reference numerals in the drawings:
[0035] 1. Compressor; 100. Motor; 10. Stator component; 11. Stator punching; 111. Stator yoke; 112. Stator teeth; 113. Stator slots; 12. Stator winding; 20. Rotor component; 21. Rotor core; 211. Mounting groove; 22. Permanent magnet; 30. Pump body component; 40. Housing.
[0036] The realization, functional features and advantages of the present utility model will be further described in conjunction with embodiments with reference to the accompanying drawings. Specific embodiments
[0037] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0038] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0039] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.
[0040] With the rapid development of industrial automation and intelligent manufacturing, as the core component of the driving device, the performance of the motor directly affects the efficiency and reliability of the entire system.
[0041] At present, the losses of the motor mainly include iron loss and copper loss. However, due to the limitations of motor design and manufacturing processes, it is often difficult to achieve an ideal balance between iron loss and copper loss. This imbalance not only reduces the overall efficiency of the motor, but also causes unstable operation of the motor, poor heat dissipation performance, and even affects the service life of the motor.
[0042] To solve this technical problem, the present utility model proposes a motor 100.
[0043] Please refer to Figures 1 to 7 , in an embodiment of the present utility model, the motor 100 includes a stator component 10 and a rotor component 20 disposed inside the stator component 10; the stator component 10 includes a stator core, the stator core includes a plurality of stator laminations 11 stacked along its axial direction, the stator lamination 11 includes a stator yoke 111 and a plurality of stator teeth 112 disposed inside the stator yoke 111, the maximum radius and the minimum radius of the stator lamination 11 are R 1 and R 2 , respectively, the stator yoke 111 and two adjacent stator teeth 112 enclose a stator slot 113, the area of the stator slot 113 is S, the number of the stator slots 113 is Q, and the number of poles of the rotor component 20 is P. With such a setting, the efficiency of the motor can be improved by balancing the iron loss and copper loss of the motor 100.
[0044] In the technical solution of the present utility model, the motor 100 includes a stator component 10 and a rotor component 20. Among them, the stator component 10 includes a stator core, and a plurality of stator slots 113 are formed on the stator lamination 11 of the stator core. By defining the area S of the stator slot 113, the number Q of the stator slots 113, the maximum radius R 1 of the stator lamination 11, 2 the minimum radius R of the stator lamination 11 and the number of poles P of the rotor component 20 satisfy: In this way, by reasonably designing the area of the stator slot 113, it is possible to ensure that there are enough stator windings 12 accommodated in the stator slot 113, reduce copper loss, and also ensure the material usage of the stator lamination 11, guarantee the flow of magnetic flux in the stator core of the motor 100, reduce iron loss, improve the motor efficiency by controlling the distribution ratio of copper loss and iron loss, and on the basis of balancing the iron loss and copper loss of the motor 100, improve the heat dissipation performance of the motor 100, and further reduce the reduction of efficiency and shortening of life caused by overheating of the motor 100.
[0045] Specifically, by defining The value of the product of and P is between 3.5 and 5.5. On the one hand, a single stator slot 113 has a larger area so that more stator windings 12 can be accommodated in the stator punching sheet 11, thereby effectively reducing the resistance loss generated when the current passes through the winding of the motor 100 and improving the copper loss of the motor 100; on the other hand, since the iron loss includes hysteresis loss and eddy current loss, wherein the hysteresis loss is positively correlated with the magnetic flux density passing through the iron core and the alternating frequency of the magnetic field, on the basis of ensuring the area of the stator slot 113, the material usage of the stator punching sheet 11 is increased, so that the width of the stator teeth 112 can be increased, ensuring the flow of magnetic flux on the stator teeth 112 and improving the hysteresis loss. At the same time, in conjunction with the specific number P of the magnetic poles of the rotor component 20, the alternating frequency of the magnetic field is changed to improve the hysteresis loss on the stator core, thereby improving the iron loss of the motor 100 and achieving a balance of the losses of the motor 100, thereby significantly improving the efficiency and reliability of the motor 100.
[0046] in, The specific values include but are not limited to 3.5, 3.6, 3.7, 3.8, 3.9, 4, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5, 5.1, 5.2, 5.3, 5.4, and 5.5.
[0047] Combination Figure 8 As shown, it can be obtained that when the limit When the specific value of is between 3.5 and 5.5, an effective balance between iron loss and copper loss can be achieved, reducing the overall loss, thereby improving the efficiency of the motor 100 under various working conditions.
[0048] Furthermore, in an embodiment of the present invention, Further reduce The value range ensures the maximization of the motor efficiency and can further improve the heat dissipation performance of the motor 100, reduce the need to complicate the motor 100 due to the need for an additional cooling system, and thus improve the performance of the motor 100.
[0049] Optionally, in an embodiment of the present utility model, 110mm 2 ≤S≤190mm 2 , it is understandable that when S is greater than 190mm 2 When S is less than 110 mm, the area of the stator slot 113 is too large, and the width of the stator teeth 112 is easily reduced on the stator punching sheet 11 of the same size, resulting in reduced structural strength of the stator punching sheet 11 and increased iron loss. 2 When the area of the stator slot 113 is too small to accommodate more copper wires, the copper loss is easily increased and the heat dissipation of the motor 100 is not conducive. Therefore, the area of the stator slot 113 is limited to 110mm. 2 and 190mm2 can effectively balance the iron loss and copper loss, thereby improving the motor efficiency and the heat dissipation performance of the motor 100.
[0050] Specifically, the specific value of the area of the stator slot 113 includes but is not limited to 110 mm 2 , 120 mm 2 , 130 mm 2 , 140 mm 2 , 150 mm 2 , 160 mm 2 , 170 mm 2 , 180 mm 2 , 190 mm 2 . However, in other embodiments, within the allowable range of the dimensions of the stator punching 11, the area of the stator slot 113 can be greater than 190 mm 2 , or less than 110 mm 2 , and in this case the specific value of
[0051] Optionally, in the embodiments of the present invention, 40 mm ≤ R 1 ≤ 70 mm; and / or, 24 mm ≤ R 2 ≤ 35 mm, where the maximum radius R 1 of the stator punching 11 is obtained from the outer radius of the stator yoke 111, and the minimum radius R 2 of the stator punching 11 is the distance between the end of the stator tooth 112 away from the stator yoke 111 and the center of the stator punching 11. It can be understood that by limiting 40 mm ≤ R 1 ≤ 70 mm; and / or, 24 mm ≤ R 2 ≤ 35 mm, the total radial length of the stator tooth 112 and the stator yoke 111 can be limited to a certain extent, so as to open a larger stator slot 113 on a limited area, thereby facilitating the balance of iron loss and copper loss, improving the motor efficiency, and also facilitating the cooperation with a larger-size rotor component 20, and improving the load capacity of the motor 100 to a certain extent.
[0052] Specifically, the specific value of the maximum radius of the stator punching 11 includes but is not limited to 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, 65 mm, 70 mm; the specific value of the minimum radius of the stator punching 11 includes but is not limited to 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, 30 mm, 32 mm, 35 mm. However, in other embodiments, within the allowable range of the dimensions of the stator punching 11, the maximum radius of the stator punching 11 can be less than 40 mm, or greater than 70 mm; the minimum radius of the stator punching 11 can be less than 24 mm, or greater than 35 mm, and in this case The specific value can also change.
[0053] The maximum radius of the outer peripheral edge of the stator punching sheet 11 is R 1 , which is the maximum distance from the center of the stator punching sheet 11 to its outer edge contour. If the outer peripheral edge of the stator punching sheet 11 is a complete circle, it can be directly measured, and the maximum value of the radius of the stator punching sheet 11 is measured as R 1 ; if the outer peripheral edge of the stator punching sheet 11 is in the form of a non-complete circle with grooves, after determining the circle at three points at the outermost end of the arc, the maximum value of the radius of the stator punching sheet 11 is measured as R 1 .
[0054] The minimum radius of the inner peripheral edge of the stator punching sheet 11 is R 2 , which is the minimum distance from the center of the stator punching sheet 11 to its inner edge contour. If the inner peripheral edge of the stator punching sheet 11 is a complete circle, it can be directly measured, and the minimum value of the radius of the stator punching sheet 11 is measured as R 2 ; if the inner peripheral edge of the stator punching sheet 11 is in the form of a non-complete circle with grooves, after determining the circle at three points at the innermost end of the arc, the minimum value of the radius of the stator punching sheet 11 is measured as R 2 .
[0055] Optionally, in the embodiment of the present invention, the thickness of the stator punching sheet 11 is t, It can be understood that since the eddy current induced by the magnetic field when the motor 100 is energized flows between two adjacent stator punching sheets 11, it will cause the stator core to generate heat and cause eddy current loss. Among them, because the eddy current loss is proportional to the thickness of the stator punching sheet 11, and the eddy current loss is also proportional to the alternating frequency. Therefore, as shown in Figure 9 shown, the value of is limited to be between 0.05 and 0.06, so as to reduce the thickness of the stator punching sheet 11, increase the resistivity of the stator punching sheet 11, extend the path of the eddy current, and thus reduce the eddy current loss and improve the motor efficiency on the basis of a limited number of magnetic poles (the same alternating frequency). This thickness is the thickness along the axial direction of the stator punching sheet 11.
[0056] Please refer to Figure 2 and Figure 3 , in the embodiment of the present invention, the outer contour of the stator yoke 111 is any one of a circle and a special shape. Among them, as shown in Figure 2 shown, the outer contour of the stator yoke 111 is a circle, which is convenient for the manufacture of the stator punching sheet 11. At the same time, it helps to have a more uniform magnetic flux distribution, reduce the local concentration of the magnetic flux, and thus reduce the iron loss; as shown in Figure 3As shown, the outer contour of the stator yoke 111 is irregular, that is, a groove is formed outside the stator yoke 111, and the distance between the bottom wall of the groove and the center of the stator lamination 11 is between the maximum radius and the minimum radius of the stator yoke 111. By providing a larger surface area, heat exchange is increased, and the heat dissipation performance of the motor 100 is improved. Among them, the contour line of the groove may include at least one of an arc segment, a straight segment, and a polyline.
[0057] Please refer to Figures 4 to 6 , in the embodiment of the present utility model, the rotor component 20 includes a rotor core 21, and a plurality of mounting grooves 211 are distributed along the circumferential direction of the rotor core 21. The mounting grooves 211 are used to fix the permanent magnets 22. The permanent magnets 22 include at least one, and their total length is L 1 , the width of the permanent magnet 22 is L 2 , It can be understood that the minimum radius R2 of the stator lamination 11 is the maximum radius of the rotor core 21, and the air gap between the two can be ignored. The number of permanent magnets 22 located in the mounting grooves 211 is not limited to one. Through (L 1 *L 2 *P), the magnetic field magnitude inside the motor 100 is obtained. Furthermore, as shown in Figure 10 , by limiting the ratio of the diameter of the rotor core 21 to the magnetic field magnitude to be between 0.3 and 0.4, it is possible to reasonably utilize the rotor core 21 to set more permanent magnets 22. On the basis of ensuring the structural strength of the rotor core 21, the maximum output torque of the motor 100 is effectively improved, and then the overload capacity of the motor 100 is improved, thereby improving the motor efficiency, and the heat dissipation efficiency of the motor 100 can also be improved to a certain extent.
[0058] Among them, the shape of the mounting groove 211 can be a straight shape as shown in Figure 4 . At this time, one permanent magnet 22 is arranged in the mounting groove 211, and its length a = L 1 ; it can also be a V shape as shown in Figure 5 . At this time, two permanent magnets 22 are arranged, and are respectively arranged in the first groove section and the second groove section of the mounting groove 211. The length of the permanent magnet 22 in the first groove section is a, and the length of the permanent magnet 22 in the second groove section is b, and a + b = L 1 ; it can also be a U shape as shown in Figure 6 . At this time, three permanent magnets 22 are arranged, and are respectively arranged in the first groove section, the second groove section and the third groove section of the mounting groove 211. The length of the permanent magnet 22 in the first groove section is a, the length of the permanent magnet 22 in the second groove section is b, and the length of the permanent magnet 22 in the third groove section is c, and a + b + c = L 1 , of course, in other embodiments, the number of permanent magnets 22 is greater than 3.
[0059] Specifically, The specific values of
[0060] Further, in the embodiments of the present utility model, That is, further narrowing the value range of to ensure the maximization of the motor efficiency.
[0061] Optionally, in the embodiments of the present utility model, 14mm ≤ L 1 ≤ 23mm; and / or, 1.1mm ≤ L 2 ≤ 1.8mm. By limiting L 1 and / or L 2 to a certain extent, the cross-sectional area of a single permanent magnet 22 can be determined. In combination with the setting of 24mm ≤ R 2 ≤ 35mm, the number of permanent magnets 22 on the rotor core 21 can be limited. In this way, on the basis of ensuring the structural stability of the rotor component 20, the maximum output torque can be increased and the motor efficiency can be improved.
[0062] Specifically, the specific values of the length of the permanent magnet 22 include but are not limited to 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm; the specific values of the width of the permanent magnet 22 include but are not limited to 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm. However, in other embodiments, with the allowance of the size of the rotor core 21, the length of the permanent magnet 22 can be less than 14mm or greater than 23mm; the width of the permanent magnet 22 can be less than 1.1mm or greater than 1.8mm. At this time the specific value of can also change.
[0063] Optionally, in the embodiments of the present utility model, 15 ≤ Q ≤ 18; wherein, the number of stator slots 113 can be selected according to actual needs.
[0064] Optionally, in the embodiments of the present utility model, 10 ≤ P ≤ 12, wherein, the number of poles of the rotor component 20 can be selected according to actual needs.
[0065] Optionally, in an embodiment of the present utility model, the number Q of the stator slots 113, the number of poles p of the rotor component 20, and the number of phases m of the motor 100 satisfy: 0 < Q / mP < 1, that is, the motor 100 is a fractional-slot motor 100. Among them, by using a fractional-slot motor 100, the uneven distribution of magnetic flux can be reduced by optimizing the combination of the number of slots and the number of poles, and a smoother torque can also be output, thereby improving the performance of the motor.
[0066] The present utility model also provides a compressor 1, which includes a motor 100. The specific structure of the motor 100 refers to the above embodiments. Since this compressor 1 adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one. Among them, the compressor 1 includes a housing 40, a stator component 10 arranged in the housing 40, a rotor component 20 arranged in the stator component 10, and a pump body component 30 connected to the rotor component 20.
[0067] The present utility model also provides a refrigeration device, which includes a compressor 1. The specific structure of the compressor 1 refers to the above embodiments. Since this refrigeration device adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.
[0068] The above are only exemplary embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present utility model.
Claims
1. A motor, characterized in that: It comprises a stator component and a rotor component arranged inside the stator component; The stator component comprises a stator core, the stator core comprises a plurality of stator punching sheets stacked along its axial direction, the stator punching sheets comprise a stator yoke and a plurality of stator teeth arranged inside the stator yoke, the maximum radius and the minimum radius of the stator punching sheets are R1 and R2 respectively, the stator yoke and two adjacent stator teeth enclose a stator slot, the area of the stator slot is S, the number of the stator slots is Q, the number of poles of the rotor component is P, 2. The motor according to claim 1, characterized in that 3. The motor according to claim 1, characterized in that 110mm 2 ≤S≤190mm 2 。 4. The motor according to claim 1, characterized in that 40mm≤R1≤70mm; and / or, 24mm≤R2≤35mm.
5. The motor according to claim 1, characterized in that The thickness of the stator sheet is t, And / or, the outer contour of the stator yoke is any one of circular and irregular.
6. The motor according to claim 1, characterized in that The rotor component includes a rotor core, and the rotor core has a plurality of mounting grooves distributed along its circumference, and the mounting grooves are used to fix permanent magnets. The permanent magnet includes at least one, and the total length thereof is L1, and the width of the permanent magnet is L2.
7. The motor according to claim 6, characterized in that 8. The motor according to claim 6, characterized in that 14mm≤L1≤23mm; and / or, 1.1mm≤L2≤1.8mm.
9. The motor according to claim 1, characterized in that 15≤Q≤18; and / or, 10≤P≤12.
10. The motor according to claim 1, characterized in that The number Q of the stator slots, the number p of the poles of the rotor component, and the number m of the motor phases satisfy: 0<Q / mP<1.
11. A compressor, characterized in that: Comprising the electric machine as claimed in any one of claims 1 to 10.
12. A refrigeration device, characterized in that: Comprising the compressor of claim 11.