Motor, compressor and refrigeration equipment

Abstract

The utility model discloses a motor, a compressor and refrigeration equipment, and relates to the technical field of motors, the motor comprises a stator and a rotor; the stator comprises a stator core and a plurality of windings, the stator punching sheet comprises a stator yoke and a plurality of stator teeth which are distributed along the inner circumference of the stator yoke at intervals, two adjacent stator teeth and the stator yoke enclose a stator slot, and the windings are wound on the stator teeth; the rotor comprises a rotor iron core and a plurality of magnetic steels, and the magnetic steels are distributed along the circumferential direction of the rotor iron core; the number of the stator grooves is Q, the number of turns of the winding is N, the wire diameter of the winding is phi, the phase number of the motor is M, the number of poles of the rotor is P, and phi * M * P / (Q * N) is larger than or equal to 0.007 and smaller than or equal to 0.021. The technical scheme provided by the utility model aims to improve the energy efficiency of the motor, meet the use requirements of the compressor and reduce the cost of the motor.

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] As a core component of a refrigeration device, the motor in a compressor directly affects the working efficiency and service life of the refrigeration device with its performance. In related technologies, the motor in a compressor usually adopts a multi-slot pole motor structure to meet the power requirements of the compressor. Among them, due to the unreasonable design of parameters such as the number of turns of the winding, the number of series in each phase, and the wire diameter of the multi-slot pole motor, the energy efficiency of the motor is reduced. Thus, to meet the efficiency requirements, more permanent magnets are needed, resulting in a high cost of the motor. Summary of the Utility Model

[0003] The main purpose of the utility model is to propose a motor, a compressor and a refrigeration device, aiming to improve the energy efficiency of the motor, meet the use requirements of the compressor, and reduce the cost of the motor.

[0004] To achieve the above object, the motor proposed by the utility model includes:

[0005] A stator, the stator includes a stator core and a plurality of windings. The stator punching sheet includes a stator yoke and a plurality of stator teeth spaced along the inner circumference of the stator yoke. An adjacent two of the stator teeth and the stator yoke enclose a stator slot, and the winding is wound around the stator teeth; and

[0006] A rotor, rotatably inserted therein. The rotor includes a rotor core and a plurality of permanent magnets, and the permanent magnets are distributed along the circumferential direction of the rotor core;

[0007] The number of the stator slots is Q, the number of turns of the winding is N, the wire diameter of the winding is Ф, the number of phases of the motor is M, and the number of rotor poles is P, satisfying: 0.007 ≤ Ф × M × P ÷ (Q × N) ≤ 0.021.

[0008] In an embodiment, the number of the stator slots Q, the number of turns of the winding N, the wire diameter of the winding Ф, the number of phases of the motor M, and the number of rotor poles P also satisfy: 0.014 ≤ Ф × M × P ÷ (Q × N) ≤ 0.021.

[0009] In an embodiment, the number of the stator slots Q and the number of rotor poles P also satisfy: 0.02 ≤ 1 ÷ [(Q - P) × (Q - P + 1)] ≤ 0.04 。

[0010] In an embodiment, the number of the stator slots Q satisfies: 15 ≤ Q ≤ 18.

[0011] In one embodiment, the number of poles P of the rotor satisfies: 10 ≤ P ≤ 12.

[0012] In one embodiment, the number of stator slots Q, the number of phases M of the motor, and the number of rotor poles P further satisfy: q = Q÷(M×P), where q < 1.

[0013] In one embodiment, the number of phases M of the motor = 3.

[0014] In one embodiment, the wire diameter N of the winding satisfies: 60 ≤ N ≤ 90.

[0015] In one embodiment, the wire diameter Ф of the winding satisfies: 0.2 mm ≤ Ф ≤ 1.4 mm.

[0016] In one embodiment, the wire diameter Ф of the winding satisfies: 0.5 mm ≤ Ф ≤ 0.7 mm.

[0017] In one embodiment, the rotor core is provided with a plurality of magnet slots distributed circumferentially, and a plurality of the magnets are respectively mounted in the plurality of magnet slots, and the cross-section of the magnet slot is V-shaped or U-shaped or W-shaped or straight-shaped or I-shaped.

[0018] The present utility model also provides a compressor, and the compressor includes the motor as described above.

[0019] The present utility model also provides a refrigeration device, and the refrigeration device includes the compressor as described above.

[0020] The technical solution of the present utility model limits the number of turns N of the winding, the wire diameter Ф of the winding, the number of stator slots Q, the number of phases M of the motor, and the number of rotor poles P, so that the value range of the formula Ф×M×P÷(Q×N) is between 0.007 and 0.021, achieving a good balance point between the speed and torque of the motor, thereby optimizing the performance of the motor and improving the efficiency of the motor. Compared with increasing the number of magnets, the technical solution of the present utility model improves the motor efficiency and saves the usage amount of magnets by reasonably designing parameters such as the number of turns of the winding, the number of phases of the motor, and the wire diameter, so as to reduce the cost of the motor while meeting the use requirements of the compressor. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model, and those of ordinary skill in the art can obtain other drawings based on the structures shown in these drawings without creative efforts.

[0022] Figure 1 Structural schematic diagram of a cross-section of a motor provided by the present utility model;

[0023] Figure 2 is Figure 1 Partial enlarged view at position A in

[0024] Figure 3 Structural schematic diagram of another cross-section of a motor provided by the present utility model;

[0025] Figure 4 Structural schematic diagram of yet another cross-section of a motor provided by the present utility model;

[0026] Figure 5 Structural schematic diagram of still another cross-section of a motor provided by the present utility model;

[0027] Figure 6 Variation diagram of the reduction amount of the magnetic steel usage and cost of the motor provided by the present utility model;

[0028] Figure 7 Efficiency variation diagram of the motor provided by the present utility model;

[0029] Figure 8 Variation relationship diagram of the force density amplitude and efficiency of the motor provided by the present utility model.

[0030] Explanation of the reference numerals in the drawings:

[0031] 100, stator core; 110, stator yoke; 120, stator teeth; 130, stator slots; 200, winding; 300, rotor core; 310, magnetic steel slots; 320, current-carrying holes; 330, shaft holes; 340, rivet holes; 400, magnetic steel.

[0032] The realization, functional features and advantages of the purpose of the present utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with 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 of 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.

[0034] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0035] In addition, if there are descriptions such as "first", "second", etc. 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, or solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory 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.

[0036] In the prior art, for the motor in a compressor, a multi-slot pole structure is usually adopted to meet the power requirements of the compressor. Among them, for the motor with a multi-slot pole structure, parameters such as the number of turns of the winding, the number of phases of the motor, and the wire diameter of the winding affect the current and voltage waveforms of the motor, affecting the performance and operation stability of the motor. However, due to the unreasonable design of the existing multi-slot pole structure motor for the above parameters, the efficiency of the motor is reduced. Thus, to improve the motor efficiency to meet the power requirements of the compressor, the number of rotor poles is usually increased to increase the magnetic flux and torque output of the motor, thereby improving the efficiency of the motor.

[0037] This technical solution optimizes the performance of the motor by controlling the distribution of the coil in the stator slot to affect the current and voltage waveforms of the motor, making them closer to a sine wave. That is, by selecting the appropriate number of slots per pole per phase, the efficiency of the generator can be improved, harmonic losses and pulsating torque can be reduced, and at the same time, the volume and weight of the motor can also be reduced, thereby avoiding the method of increasing the number of permanent magnets to improve the motor efficiency, and thus reducing the cost of the motor.

[0038] The present utility model proposes a motor.

[0039] Please refer to Figure 1 、 Figure 2 、 Figure 6 and Figure 7 , in an embodiment of the present utility model, the motor includes:

[0040] Stator, the stator includes a stator core 100 and a plurality of windings 200. The stator lamination includes a stator yoke 110 and a plurality of stator teeth 120 spaced along the inner circumference of the stator yoke 110. An adjacent pair of the stator teeth 120 and the stator yoke 110 enclose a stator slot 130, and the winding 200 is wound around the stator teeth 120; and

[0041] Rotor, the rotor includes a rotor core 300 and a plurality of permanent magnets 400, and the permanent magnets 400 are distributed circumferentially along the rotor core 300;

[0042] The number of stator slots 130 is Q, the number of turns of the winding 200 is N, the wire diameter of the winding 200 is Ф, the number of phases of the motor is M, and the number of rotor poles is P, satisfying: 0.007 ≤ Ф × M × P ÷ (Q × N) ≤ 0.021.

[0043] The technical solution of the present invention limits the number of turns N of the winding 200, the wire diameter Ф of the winding 200, the number Q of stator slots, the number M of motor phases, and the number P of rotor poles, so that the value range of the formula Ф × M × P ÷ (Q × N) is between 0.007 and 0.021, achieving a good balance between the speed and torque of the motor, thereby optimizing the performance of the motor and improving the efficiency of the motor. Compared with increasing the number of permanent magnets 400, the technical solution of the present invention improves the motor efficiency and saves the usage of permanent magnets 400 by reasonably designing parameters such as the number of turns of the winding 200, the number of motor phases, and the wire diameter, thereby reducing the cost of the motor while meeting the usage requirements of the compressor.

[0044] As Figure 6 shown, compared with the unreasonable design of parameters such as the number of turns of the winding 200, the number of series per phase, and the wire diameter of a multi-slot pole motor, this embodiment reduces the usage of permanent magnets 400 by 32.5% and saves the price of permanent magnets 400 by 28.0%. Reflected in the total price of the motor, it is reduced by 22.8%. As Figure 7 shown, when the value of the formula Ф × M × P ÷ (Q × N) is 0.007, the efficiency of the motor is above 93.63%. When the value of the formula Ф × M × P ÷ (Q × N) is 0.021, the efficiency of the motor is above 93.71%. And when the formula Ф × M × P ÷ (Q × N) is between 0.007 and 0.021, the efficiency of the motor is above 93.6%. It can be understood that when the value of the formula Ф × M × P ÷ (Q × N) is between 0.007 and 0.021, the motor is in a state of relatively high processing efficiency and can meet the usage requirements of the compressor.

[0045] It should be noted that for the multi-slot pole motor structure, the stator slot 130 is the space on the stator core 100 for placing the winding 200. The number of stator slots 130 affects the magnetic flux distribution, winding 200 layout, and heat dissipation performance of the motor. More stator slots 130 mean better heat dissipation and a higher winding 200 filling rate. In this embodiment, the number of turns of the winding 200 is the number of turns of the coil in the winding 200. The number of turns determines the magnitude of the magnetomotive force generated by the winding 200, thereby affecting the electromagnetic torque and efficiency of the motor. The more turns, the greater the magnetomotive force generated by the winding 200, thus increasing the electromagnetic torque. The wire diameter of the winding 200 determines the cross-sectional area of the winding 200, thereby affecting the resistance and current capacity of the winding 200. Among them, a larger wire diameter means a smaller resistance of the winding 200 and a larger current capacity, and reduces the copper loss during the operation of the motor. The number of phases of the motor determines the power supply method and the pulsation of the electromagnetic torque of the motor. The more phases, the smaller the pulsation of the electromagnetic torque of the motor and the more stable the operation. The number of rotor poles determines the speed and torque characteristics of the motor. The more poles, the lower the speed, but the smaller the torque pulsation. In addition, the measurement position of the wire diameter Ф is at the end of the lead wire of the winding 200, where it is not affected by the tension during the stator winding process, and the change in wire diameter before and after winding is small.

[0046] According to the above analysis, it can be understood that when Ф×M×P÷(Q×N) is small, it means that the ratio of the wire diameter of the winding 200 to the number of turns of the winding 200 is smaller relative to the number of stator slots 130, the number of phases of the motor, and the number of rotor poles, that is, the wire diameter of the winding 200 is smaller or the number of turns of the winding 200 is more. At this time, Ф×M×P÷(Q×N) takes a value of 0.007, and the motor tends to be selected between increasing the magnetomotive force and balancing the resistance of the winding 200 to achieve a good balance point of the motor efficiency. When Ф×M×P÷(Q×N) is large, it means that the ratio of the wire diameter of the winding 200 to the number of turns of the winding 200 is larger relative to the number of stator slots 130, the number of phases of the motor, and the number of rotor poles, that is, the wire diameter of the winding 200 is larger or the number of turns of the winding 200 is less. At this time, Ф×M×P÷(Q×N) takes a value of 0.021, and the motor tends to be selected between increasing the current capacity and balancing the magnetomotive force to achieve a good balance point of the motor efficiency. Thus, by limiting Ф×M×P÷(Q×N) to be between 0.007 and 0.021, the relationship between the speed and the electromagnetic torque can be better balanced, so that the efficiency of the motor is in a better range, meeting the requirements of the compressor, and reducing the number of permanent magnets 400, thereby reducing the cost of the motor.

[0047] In one embodiment, please continue to refer to Figure 1 and Figure 2, the number Q of stator slots 130, the number of turns N of the winding 200, the wire diameter Ф of the winding 200, the number of phases M of the motor, and the number of rotor poles P also satisfy: 0.014 ≤ Ф × M × P ÷ (Q × N) ≤ 0.021. It can be understood that when selecting Ф × M × P ÷ (Q × N), a larger value is preferred to increase the wire diameter of the winding 200 and reasonably balance the number of turns of the winding 200, so as to ensure that the magnetomotive force is in a good range and improve the efficiency of the motor. Specifically, Ф × M × P ÷ (Q × N) can take values of 0.014, 0.017, 0.021. As Figure 4 shown, when Ф × M × P ÷ (Q × N) takes the value of 0.014, the efficiency of the motor is 93.52%. In other embodiments, Ф × M × P ÷ (Q × N) can take values of 0.007, 0.008, 0.010.

[0048] In one embodiment, please refer to Figure 8 , the number Q of stator slots 130 and the number of rotor poles P also satisfy: 0.02 ≤ 1 ÷ [(Q - P) × (Q - P + 1)] ≤ 0.04 。 The more the number of stator slots 130, the more the air gaps, and the greater the magnetic resistance of the stator core 100 to the magnetic circuit. To maintain the optimal performance of the motor, it is necessary to relatively thicken the winding wire of the winding 200, increase the number of winding turns on the stator, or increase the overall length of the winding wire to generate a greater magnetic field intensity to overcome the increased magnetic resistance. On the contrary, when the number of stator slots 130 is relatively small, the magnetic flux on the stator is also small, and the magnetic flux on the stator is in an undersaturated state, which reduces the efficiency of the motor and the power density of the motor. Further from the perspective of the rotor, taking an interior permanent magnet motor with tangential magnetization as an example, when the number of rotor poles P is relatively small, the number of permanent magnets 400 is also small, and the magnetic flux on the rotor is low. Therefore, the magnetic flux participating in the electromechanical energy conversion through the air gap between the rotor and the stator is also low, and the power density of the motor is also low. At this time, to maintain the optimal performance of the motor, it is necessary to relatively increase the radial dimension of the permanent magnet 400 to increase the magnetic flux on the rotor, which will also increase the radial dimension of the rotor core 300, so the cost of the motor will increase. On the contrary, when the number of rotor poles P of the motor is relatively large, the number of permanent magnets 400 is also relatively large, and the magnetic flux on the rotor is in an oversaturated state, which increases the iron loss of the motor. When the speed remains unchanged, the frequency of the three-phase power required for the operation of the motor with a relatively large number of rotor poles P will increase, further increasing the iron loss of the motor, resulting in a decrease in the efficiency of the motor and an increase in the cost of the motor.

[0049] Therefore, both the number of rotor poles P and the number of stator slots 130 have a great impact on the efficiency, performance, and cost of the motor. At the same time, it is also found in the research that the number of rotor poles P and the number of stator slots 130 also have a great impact on the electromagnetic vibration amplitude of the motor, as Figure 8As shown, when the value of the formula 1÷[(Q - P)×(Q - P + 1)] is 0.02, the force density amplitude of the motor is 29783 KN / ㎡, and the efficiency of the motor is 92.74%. When the value of the formula 1÷[(Q - P)×(Q - P + 1)] is 0.03, the force density amplitude of the motor is 23151 KN / ㎡, and the efficiency of the motor is 92.8%. When the value of the formula 1÷[(Q - P)×(Q - P + 1)] is 0.04, the force density amplitude of the motor is 24539 KN / ㎡, and the efficiency of the motor is 92.76%. It shows a state of relatively small force density amplitude and relatively high motor efficiency. At this time, the performance of the motor is relatively good, and the cost is also relatively reduced.

[0050] In one embodiment, please refer to Figure 1 , the number Q of the stator slots 130 satisfies: 15 ≤ Q ≤ 18. According to the influence of the number of the stator slots 130 on the magnetic flux distribution, winding 200 layout and heat dissipation performance of the motor, more stator slots 130 mean better heat dissipation and higher winding 200 filling rate. Thus, when the number of the stator slots 130 is between 15 and 18, it helps to reduce the harmonic magnetic field and harmonic leakage reactance, making the motor run more smoothly and reducing unnecessary energy loss. In addition, when the size of the motor remains unchanged, as the number of the stator slots 130 increases, the corresponding stator slots 130 will become smaller, and the number of turns of the winding 200 will also decrease accordingly, thereby reducing the reactance. This change is beneficial to the increase of the motor torque, enabling the motor to generate a greater torque under the same conditions and improving the load capacity of the motor. Of course, too many stator slots 130 will also increase the processing difficulty. Selecting the number of the stator slots 130 between 15 and 18 can ensure the processing convenience of the stator slots 130 while better improving the motor torque. Of course, in other embodiments, the number of the stator slots 130 can also be configured as 8, 9 or 10.

[0051] In one embodiment, please refer to Figure 1 , the number of rotor poles P satisfies: 10 ≤ P ≤ 12. It can be understood that the number of rotor poles determines the speed and torque characteristics of the motor. The more poles, the lower the speed, but the smaller the torque ripple. Thus, compared with a motor with a smaller number of rotor poles, the motor in this embodiment is configured as a 10-pole motor to a 12-pole motor, which can have a lower speed at the same frequency, helping to reduce the mechanical noise during motor operation and making the motor run more quietly. Moreover, the torque output of the motor with the number of rotor poles in this range is smoother, and the peak torque relative to the rated torque of the motor will also decrease. This smooth torque output is beneficial to reducing mechanical shock and vibration and improving the operation stability and life of the motor. Of course, in other embodiments, the number of rotor poles can also be configured as 6, 8 or 14.

[0052] In one embodiment, please refer to Figure 1, the number Q of stator slots 130, the number of phases M of the motor, and the number of rotor poles P also satisfy: q = Q÷(M×P), where q < 1. It can be understood that q = Q÷(M×P) is the number of slots per pole per phase. Limiting q to be less than 1 can optimize the magnetic field distribution and reduce harmonic components, thereby improving the motor performance. At the same time, through reasonable winding layout and current control, higher torque density and power density can be achieved. Of course, in other embodiments, the number of slots per pole per phase of the motor can also be between 1 and 2.

[0053] In one embodiment, please refer to Figure 1 , M = 3, that is, the number of phases of the motor is configured as 3. It can be understood that the number of phases of the motor determines the power supply mode of the motor and the pulsation of the electromagnetic torque. The more phases, the smaller the pulsation of the electromagnetic torque of the motor, and the more stable the operation. Thus, compared with single-phase or two-phase motors, three-phase motors can make better use of space, make the current and magnetic field more evenly distributed inside the motor, thereby improving the power density. And this phase difference makes the vibration and noise generated by the motor during operation smaller, improving the balance and stability of the motor. In addition, due to the advantages of high efficiency, stability, reliability, etc. of three-phase motors, they are widely used in industrial production, transportation, household appliances and other fields. Selecting the number of phases of the motor to be 3 can improve the applicability of the motor in this embodiment. Of course, in other embodiments, the number of phases of the motor can also be configured as 2.

[0054] In one embodiment, please refer to Figure 1 , N satisfies: 60 ≤ N ≤ 90. It can be understood that the number of turns determines the magnitude of the magnetomotive force generated by the winding 200, thereby affecting the electromagnetic torque and efficiency of the motor. The more turns, the greater the magnetomotive force generated by the winding 200, thereby increasing the electromagnetic torque. Thus, within this range of the number of turns, it can ensure that the motor operates at an appropriate resistance and current, thereby maintaining a high output power. At the same time, the operation and starting performance of the motor are usually better. Of course, in other embodiments, the number of turns of the winding 200 can also be between 90 and 130.

[0055] In one embodiment, please refer to Figure 1, Ф satisfies: 0.2 mm ≤ Ф ≤ 1.4 mm. It can be understood that the wire diameter of the winding 200 determines the cross-sectional area of the winding 200, thereby affecting the resistance and current capacity of the winding 200. Among them, a larger wire diameter means a smaller resistance of the winding 200 and a larger current capacity, and reduces the copper loss during the operation of the motor. Among them, for a smaller wire diameter (such as 0.2 mm to 0.5 mm), it is applicable to motors with smaller power. As the wire diameter increases (such as 0.5 mm to 1.4 mm), the resistance and loss gradually decrease, thereby improving the efficiency of the motor. Thus, selecting an appropriate wire diameter within the range of 0.2 mm to 1.4 mm can optimize the cost-effectiveness while ensuring the performance of the motor. Specifically, in this embodiment, the wire diameter of the winding 200 can be between 0.5 mm and 0.7 mm, and the values can be 0.5 mm, 0.55 mm, 0.6 mm, 0.65 mm or 0.7 mm.

[0056] In one embodiment, please refer to Figure 1 , according to the formula Ф × M × P ÷ (Q × N), when the number of phases of the selected motor is 3, the number of stator slots 130 is 15, and the number of rotor slots is 10, the wire diameter of the winding 200 and the number of turns of the winding 200 are adjusted to control the value of Ф × M × P ÷ (Q × N) between 0.008 and 0.021, so as to better balance the relationship between the rotational speed and the electromagnetic torque and ensure that the efficiency of the motor is within a better range. Specifically, for example: when the wire diameter is 0.5 mm and the number of turns is 128, Ф × M × P ÷ (Q × N) = 0.008; when the wire diameter is 0.55 mm and the number of turns is 107, Ф × M × P ÷ (Q × N) = 0.010; when the wire diameter is 0.6 mm and the number of turns is 91, Ф × M × P ÷ (Q × N) = 0.013; when the wire diameter is 0.65 mm and the number of turns is 78, Ф × M × P ÷ (Q × N) = 0.017; when the wire diameter is 0.7 mm and the number of turns is 68, Ф × M × P ÷ (Q × N) = 0.021.

[0057] In one embodiment, please refer to Figure 1 , Figures 3 to 5 , the rotor core 300 is provided with a plurality of magnet slots 310 distributed circumferentially. A plurality of magnets 400 are respectively installed in the plurality of magnet slots 310, and the cross-section of the magnet slot 310 is V-shaped or U-shaped or W-shaped or straight or I-shaped. It can be understood that the magnetic resistance path of the V-shaped or U-shaped or W-shaped magnet slot 310 is shorter, which helps to improve the efficiency and electromagnetic torque of the motor; the structure of the magnet 400 in the straight magnet slot 310 is simple and easy to manufacture, and is more suitable for low-speed and low-power density scenarios; the I-shaped magnet slot 310, that is, the Ι-shaped magnet slot 310, has better installation stability of the magnet 400 inside, which helps to reduce the friction and impact between the rotor core 300 and the magnet 400, and further reduces noise and vibration. Such as Figure 1As shown, the magnet slot 310 is configured as a straight magnet slot 310 and extends in the chordal direction of the rotor core 300. Of course, it can also extend in the radial direction or extend obliquely relative to the radial direction; as Figure 3 shown, the magnet slot 310 is configured as a V-shaped magnet slot 310, and its opening is arranged facing away from the shaft hole 330 in the middle of the rotor core 300; as Figure 4 shown, the magnet slot 310 is configured as a U-shaped magnet slot 310, and its opening is arranged facing away from the shaft hole 330 in the middle of the rotor core 300; as Figure 5 shown, the magnet slot 310 is configured as a W-shaped magnet slot 310, and its opening is arranged facing away from the shaft hole 330 of the rotor core 300. Of course, for other types of magnet slots 310, they can also be provided in other embodiments, such as the arc-shaped magnet 400 of the pasted type or the inserted type.

[0058] In one embodiment, please refer to Figure 1 , the cross-section of the motor includes a rotor punching and a stator punching. A plurality of stator punchings are laminated to form a stator core 100 under the winding action of the winding 200. For the rotor punching, a shaft hole 330 and a rivet hole 340 are formed on the rotor punching. A plurality of rotor punchings are laminated to form a rotor core 300 by means of rivets passing through the rivet holes 340. At the same time, a shaft hole 330 is laminated in the middle for the shaft to pass through for power output.

[0059] The present invention also provides a compressor, which includes a motor. The specific structure of the motor refers to the above embodiments. Since this compressor 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. It should be noted that in this embodiment, as Figure 1 shown, the motor housing is the compressor housing, the motor is located in the cavity of the compressor, and a through-flow hole 320 is formed on the rotor core 300 for the refrigerating oil and refrigerant in the compressor cavity to circulate. Of course, in other embodiments, the motor housing and the compressor housing can also be independently provided.

[0060] The present invention also provides a refrigeration device, which includes a compressor. The specific structure of the compressor 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. Among them, the refrigeration device can be configured as an air conditioner or a refrigerator.

[0061] The above are only exemplary embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. 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 any direct / indirect application in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A motor, characterized in that: include: A stator, wherein the stator comprises a stator core and a plurality of windings, the stator punching sheet comprises a stator yoke and a plurality of stator teeth spaced apart along the inner circumference of the stator yoke, two adjacent stator teeth and the stator yoke enclose a stator slot, and the windings are wound around the stator teeth; as well as A rotor, the rotor comprising a rotor core and a plurality of magnetic steels, wherein the magnetic steels are distributed along the circumference of the rotor core; The number of stator slots is Q, the number of turns of the winding is N, the wire diameter of the winding is Ф, the number of phases of the motor is M, and the number of rotor poles is P, satisfying: 0.007≤Ф×M×P÷(Q×N)≤0.

021.

2. The motor according to claim 1, characterized in that The number of stator slots Q, the number of turns N of the winding, the wire diameter Φ of the winding, the number of phases M of the motor, and the number of rotor poles P also satisfy: 0.014≤Φ×M×P÷(Q×N)≤0.

021.

3. The motor according to claim 1, characterized in that The number Q of stator slots and the number P of rotor poles also satisfy: 0.02≤1÷[(QP)×(Q-P+1)]≤0.04 。 4. The motor according to claim 1, characterized in that The number Q of the stator slots satisfies: 15≤Q≤18.

5. The motor according to claim 1, characterized in that The number of rotor poles P satisfies: 10≤P≤12.

6. The motor according to claim 1, characterized in that The number Q of the stator slots, the number M of the phases of the motor and the number P of the rotor poles also satisfy: q=Q÷(M×P), where q<1.

7. The motor according to claim 1, characterized in that The phase number of the motor is M=3.

8. The motor according to claim 1, characterized in that The number of turns N of the winding satisfies: 60≤N≤90.

9. The motor according to claim 1, characterized in that The wire diameter Ф of the winding satisfies: 0.2mm≤Ф≤1.4mm.

10. The motor according to claim 9, characterized in that The wire diameter Ф of the winding satisfies: 0.5mm≤Ф≤0.7mm.

11. The motor according to claim 1, characterized in that The rotor core is provided with a plurality of magnetic steel slots distributed in the circumferential direction, and the plurality of magnetic steels are installed in the plurality of magnetic steel slots in a one-to-one correspondence, and the cross-section of the magnetic steel slots is V-shaped, U-shaped, W-shaped, straight, or I-shaped.

12. A compressor, characterized in that: Comprising a motor as claimed in any one of claims 1 to 11.

13. A refrigeration device, characterized in that: Comprising the compressor of claim 12.

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