Motor, compressor and refrigeration equipment

Abstract

The invention discloses a motor, a compressor and refrigeration equipment, and relates to the technical field of permanent magnet motors, stator teeth and stator slots on the inner circumference of a stator core are alternately distributed, windings are arranged in the stator slots, the number of the stator slots is Q, the diameter of the maximum outer circle contour of the stator core is D1, the diameter of the maximum circle contour defined by the slot bottoms of the plurality of stator slots is D2, the diameter of the minimum inner circle outline of the stator core is D3, the rotor is rotatably mounted in the stator, the number of pole pairs of the rotor is P, and GCD (Q, P) * (D1-D2) / 2) / ((D1-D3) / 2) is greater than or equal to 1.4 and less than or equal to 2.6, and ((D2-D3) / 2) / (D3 / 2) is greater than or equal to 0.3 and less than or equal to 0.42, and GCD (Q, P) is the largest common divisor of Q and P. The technical scheme provided by the invention aims at balancing the rigidity and temperature of the stator, and ensuring the low-noise operation of the motor and the operation reliability of the motor at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of permanent magnet motors, and in particular to a motor, a compressor and a refrigeration device. Background Art

[0002] Motors, essential devices for converting electrical energy into mechanical energy, play a key role in compressor-based refrigeration equipment such as refrigerators and air conditioners. Conventional technologies have reduced heat generation and improved motor heat dissipation by increasing the area of ​​the stator slots. However, excessively large stator slots can reduce the structural strength of the stator core, exacerbating motor vibration and making it difficult to meet the quiet requirements of both the motor and the compressor. Summary of the Invention

[0003] The main purpose of the present invention is to propose a motor, a compressor and a refrigeration device, which are designed to balance the stator stiffness and temperature, ensure low-noise operation of the motor, and also ensure the operational reliability of the motor.

[0004] To achieve the above objectives, the present invention provides a motor comprising a stator and a rotor, the stator comprising a stator core and a winding, the stator core comprising a stator yoke and a plurality of stator teeth spaced along the inner circumference of the stator yoke, two adjacent stator teeth and the stator yoke forming a stator slot, the winding being disposed in the stator slot, the number of stator slots being Q, the maximum outer diameter of the stator core being D1, the maximum diameter of the circular contour formed by the bottoms of the plurality of stator slots being D2, and the minimum inner diameter of the stator core being D3; the rotor being rotatably mounted within the stator, the number of pole pairs of the rotor being P; At the same time: and , where GCD(Q,P) is the greatest common divisor of Q and P, and the units of D1, D2, and D3 are mm.

[0005] In one embodiment, .

[0006] In one embodiment, .

[0007] In one embodiment, .

[0008] In one embodiment, , , , the number of slots per pole and phase of the motor is q, the number of phases of the motor is m, and q=Q / 2mP is set to satisfy: .

[0009] In one embodiment, , .

[0010] The present invention further provides a compressor, comprising the motor as described above, wherein the compressor is configured as a rotary compressor.

[0011] In one embodiment, the compressor further includes a pump body and a housing portion, the housing portion including a main housing and a first housing and a second housing provided at opposite ends of the main housing, the motor is located within the main housing, the outer periphery of the stator core is fixed to the inner periphery of the main housing, the length of the main housing in the axial direction of the compressor is h, and the thickness of the main housing is t, where h and t are expressed in mm, and the following conditions are satisfied: .

[0012] In one embodiment, .

[0013] The present invention also provides a refrigeration device, which includes the compressor as described above.

[0014] The technical solution of the present invention is to take the ratio of the thickness of the stator yoke in the radial direction of the stator core to the ring width of the stator core, and multiply it by the greatest common divisor of the number of stator slots Q and the number of rotor pole pairs P to form the formula: , and limit the value to between 1.4 and 2.6 to ensure that the ratio of the stator yoke thickness to the stator core ring width is within a reasonable range, thereby ensuring the stiffness of the stator core. This not only effectively suppresses motor vibration and reduces the noise caused by motor vibration, but also ensures that the area ratio of the stator slots is within a reasonable range, making the number of windings more reasonable and reducing the probability of the motor overheating. In this way, A value between 1.4 and 2.6 balances stator rigidity and temperature, ensuring motor reliability. Furthermore, the greatest common divisor of the number of stator slots, Q, and the number of rotor pole pairs, P, falls within a reasonable range, minimizing the excitation source vibration generated by the motor and, consequently, reducing the vibration noise caused by the motor.

[0015] Furthermore, the ratio between the thickness of the stator slot in the radial direction and the inner diameter D3 of the stator core is taken to form the formula , and is limited to between 0.3 and 0.42 to ensure that the ratio of the radial depth of the stator slot to the inner radius of the stator core is within a reasonable range, thereby ensuring the rigidity of the stator core, suppressing the vibration amplitude of the stator core, and reducing the noise caused by motor vibration. At the same time, it also avoids too little winding and reduces the probability of the motor overheating. In this way, The value between 0.3 and 0.42 effectively balances the rigidity and temperature of the stator, thus ensuring the operational reliability of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1 A schematic structural diagram of an embodiment of a motor provided by the present invention; Figure 2 for Figure 1 Schematic diagram of the structure of the stator core; Figure 3 A schematic structural diagram of another embodiment of the stator core of the motor provided by the present invention; Figure 4 A schematic structural diagram of an embodiment of a compressor provided by the present invention; Figure 5 A diagram showing the relationship between noise and temperature when a motor according to an embodiment of the present invention is operated in a compressor; Figure 6 A diagram showing the relationship between vibration and temperature when a motor according to an embodiment of the present invention is operated in a compressor; Figure 7 This is a diagram showing the relationship between vibration and temperature during operation of an embodiment of a compressor provided by the present invention.

[0018] Description of Figure Numbers: 100 , stator; 110 , stator core; 111 , stator yoke; 112 , stator teeth; 113 , stator slots; 200 , rotor; 300 , pump body; 310 , crankshaft; 400 , housing; 410 , first housing; 420 , second housing; 430 , main housing.

[0019] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0022] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] It should be noted that during motor operation, the stator core 110 must withstand a variety of complex loads, including electromagnetic forces, thermal stresses, and mechanical vibrations. The structural rigidity of the stator core 110 directly affects its deformation resistance and vibration suppression capabilities. Parameters such as the area of ​​the stator slots 113, the radial thickness of the stator yoke 111, the ring width of the stator core 110, and the inner diameter of the stator core 110 influence the heat dissipation path and thermal resistance of the windings, thereby affecting the temperature level of the motor.

[0024] The present invention provides a motor. Figure 1 、 Figures 4 to 6 In one embodiment of the present invention, the motor includes a stator 100 and a rotor 200. The stator 100 includes a stator core 110 and a winding. The stator core 110 includes a stator yoke 111 and a plurality of stator teeth 112 spaced apart along the inner circumference of the stator yoke 111. Two adjacent stator teeth 112 and the stator yoke 111 enclose a stator slot 113. The winding is disposed in the stator slot 113. The number of stator slots 113 is Q. The maximum outer diameter of the stator core 110 is D1. The maximum diameter of the circular contour formed by the bottoms of the plurality of stator slots 113 is D2. The minimum inner diameter of the stator core 110 is D3. The rotor 200 is rotatably mounted in the stator 100. The number of pole pairs of the rotor 200 is P. At the same time: and , where GCD(Q,P) is the greatest common divisor of Q and P, and the units of D1, D2, and D3 are mm.

[0025] The technical solution of the present invention is to take the ratio of the thickness of the stator yoke 111 in the radial direction of the stator core 110 to the ring width of the stator core 110, and multiply it by the greatest common divisor of the number Q of the stator slots 113 and the number P of the rotor 200 pole pairs to form the formula , and is limited to a value between 1.4 and 2.6 to ensure that the ratio of the thickness of the stator yoke 111 to the ring width of the stator core 110 is within a reasonable range, thereby ensuring the stiffness of the stator core 110. This not only effectively suppresses motor vibration and reduces noise caused by motor vibration, but also ensures that the area ratio of the stator slot 113 is within a reasonable range, making the number of windings more reasonable and reducing the probability of overheating of the motor. In this way, A value between 1.4 and 2.6 balances the stiffness and temperature of the stator 100, thereby ensuring the operational reliability of the motor. Furthermore, the greatest common divisor of the number Q of stator slots 113 and the number P of rotor pole pairs is within a reasonable range, reducing the excitation source vibration generated by the motor and thus reducing the vibration noise caused by the motor.

[0026] Furthermore, the ratio between the thickness of the stator slot 113 in the radial direction and the inner diameter D3 of the stator core 110 is taken to form the formula , and is limited to between 0.3 and 0.42 to ensure that the ratio of the radial depth of the stator slot 113 to the inner radius of the stator core 110 is within a reasonable range, thereby ensuring the rigidity of the stator core 110, suppressing the vibration amplitude of the stator core 110, and reducing the noise caused by motor vibration. At the same time, it also avoids too little winding and reduces the probability of the motor overheating. In this way, The value between 0.3 and 0.42 effectively balances the rigidity and temperature of the stator 100 , thereby ensuring the operational reliability of the motor.

[0027] It should be noted that GCD (Q, P) reflects the degree of periodic matching of the magnetic circuit between the stator 100 and the rotor 200. The larger the value of GCD (Q, P), the shorter the repetition period of the magnetic circuit between the stator 100 and the rotor 200, the more uniform the distribution of electromagnetic excitation, and the smaller the radial electromagnetic force, which helps to reduce the local magnetic flux density and hysteresis loss, and reduce the vibration of the excitation source, thereby reducing iron loss and vibration noise. It can be understood that the thickness of the stator yoke 111 of the stator core 110 is The larger the stator yoke 111 is, the greater the rigidity of the stator core 110 is. However, when the thickness of the stator yoke 111 is constant, the ring width of the stator core 110 is proportional to the ratio of the stator yoke 111 to the stator core 110. The larger the value, the greater the radial depth of the stator slot 113, and the more the rigidity of the stator 100 is reduced. and The ratio of is within a reasonable range, ensuring the rigidity of the stator core 110, while the stator slots 113 also have sufficient slot area to accommodate the windings. Combined with a motor design that reduces excitation source vibration, a high-rigidity, low-excitation motor can be formed.

[0028] Among them, such as Figure 5 As shown, the motor is installed in the compressor, and the compressor is used as the measurement target. When the compressor is running, it can be seen that The value of changes, The larger the value of , the better the rigidity of the stator core 110 of the motor. However, since the area of ​​the stator slot 113 is reduced, the amount of winding is also reduced accordingly, and the electrical load increases accordingly, resulting in reliability problems such as overheating and insulation failure in the motor. Figure 5 As shown, When the value is 1.2, the noise level of the compressor is 79dB and the operating temperature is 91.5℃; When the value is 1.4, the noise level of the compressor is 77.5dB and the operating temperature is 92.5℃; When the value is 1.5, the noise level of the compressor is 76.5dB and the operating temperature is 94°C; When the value is 1.6, the noise level of the compressor is 75.5dB and the operating temperature is 95°C; When the value is 1.8, the noise level of the compressor is 74dB and the operating temperature is 95.5℃; When the value is 2.0, the noise level of the compressor is 73dB and the operating temperature is 97°C; When the value is 2.2, the noise level of the compressor is 72.5dB and the operating temperature is 98°C; When the value is 2.4, the noise level of the compressor is 72dB and the operating temperature is 100°C; When the value is 2.6, the noise level of the compressor is 71.5dB and the operating temperature is 102°C; When the value is 2.8, the compressor noise is 70.8dB and the operating temperature is 104℃.

[0029] It can be seen that when When it is less than 1.4, the thickness of the stator yoke 111 and the overall area ratio of the stator core 110 are reduced, the rigidity of the stator 100 is reduced, the vibration of the compressor is aggravated, and the overall noise of the compressor is affected; when When it is greater than 2.6, although the rigidity of the stator core 110 is greatly improved, the proportion of the stator slot 113 area to the stator core 110 is reduced, the amount of winding is smaller, and the electrical load is in a larger range, resulting in the motor overheating and insulation failure. When the value is between 1.4 and 2.6, the noise of the compressor is between 71.5dB and 77.5dB after the motor is installed on the compressor, and the operating temperature of the compressor is between 92.5°C and 102°C, which can better balance the rigidity and temperature of the stator 100 of the motor.

[0030] Furthermore, in this embodiment, Figure 5 As shown, When the value is 1.5, the noise level of the compressor is 76.5dB and the operating temperature is 94°C; When the value is 1.6, the noise level of the compressor is 75.5dB and the operating temperature is 95°C; When the value is 1.8, the noise level of the compressor is 74dB and the operating temperature is 95.5℃; When the value is 2.0, the noise level of the compressor is 73dB and the operating temperature is 97°C; When the value is 2.4, the noise of the compressor is 72dB and the operating temperature is 100℃. When the value is between 1.5 and 2.4, the noise of the compressor is between 72dB and 76.5dB after the motor is installed on the compressor, and the operating temperature of the compressor is between 94°C and 100°C, which can better balance the rigidity of the motor's stator 100 and the temperature of the stator 100.

[0031] Specifically, Possible values ​​are 1.4, 1.5, 1.6, 1.8, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, or 2.6.

[0032] Regarding the relationship between the inner diameter of the stator core 110 and the radial depth of the stator slot 113, Figure 6 As shown, when the thickness of the stator yoke 111 is constant, the smaller the inner diameter D3 of the stator core 110, the longer the length of the stator teeth 112 in the radial direction, the smaller the rigidity of the stator core 110, and the greater the vibration amplitude of the stator core 110; combined with the depth dimension of the stator slot 113 The larger the size, the greater the proportion of the area of ​​the stator slot 113 in the stator core 110, the larger the hollow area of ​​the stator core 110, and the more serious the deterioration of the vibration and noise during the operation of the motor. Figure 6 As shown, the motor is installed in the compressor, and the compressor is used as the measurement target. When the compressor is running, it can be seen that The value of changes, The smaller the value, the better the rigidity of the stator core 110 of the motor. However, since the area ratio of the stator slot 113 is reduced, the amount of winding is also reduced accordingly, and the electrical load increases accordingly, resulting in reliability problems such as overtemperature and insulation failure in the motor.

[0033] like Figure 6 As shown, When the value is 0.20, the vibration of the compressor is 1.05m·s -2 , operating temperature is 119℃; When the value is 0.25, the vibration of the compressor is 1.35m·s -2 , operating temperature is 110℃; When the value is 0.30, the vibration of the compressor is 1.6m·s -2 , operating temperature is 107℃; When the value is 0.34, the vibration of the compressor is 1.8m·s -2 , operating temperature is 101℃; When the value is 0.38, the vibration of the compressor is 2.0m·s -2 , operating temperature is 96℃; When the value is 0.42, the vibration of the compressor is 2.2m·s -2 , operating temperature is 93℃; When the value is 0.50, the vibration of the compressor is 2.9m·s -2 , operating temperature is 90.5℃; It can be seen that when When it is less than 0.30, the inner diameter of the stator 100 increases, the depth of the stator slot 113 in the radial direction decreases, the rigidity of the stator core 110 is greatly improved, and the anti-vibration ability of the compressor is better. However, since the slot area ratio of the stator slot 113 is reduced, the amount of motor winding is reduced, the electrical load increases, and the motor temperature deteriorates, resulting in a decrease in the reliability of the motor and the compressor. When When the value is greater than 0.42, the inner diameter of the stator core 110 decreases, the radial depth of the stator slot 113 increases, and the proportion of the slot area of ​​the stator slot 113 to the entire stator core 110 increases, resulting in a decrease in the rigidity of the stator core 110, thereby increasing the vibration noise of the compressor. Between 0.30 and 0.42, the vibration of the compressor is 1.6m·s after the motor is installed on the compressor. -2 to 2.2 m·s -2 The operating temperature of the compressor is between 93° C. and 107° C., which can better balance the rigidity of the stator 100 of the motor and the temperature of the stator 100 .

[0034] Furthermore, in this embodiment, Figure 6 As shown, When the value is 0.34, the vibration of the compressor is 1.8m·s -2 , operating temperature is 101℃; When the value is 0.38, the vibration of the compressor is 2.0m·s -2 , the operating temperature is 96℃. Between 0.34 and 0.38, the motor is installed on the compressor and the vibration of the compressor is 1.8m·s -2 Up to 2.0 m·s -2 The operating temperature of the compressor is between 96° C. and 101° C., which can better balance the rigidity of the stator 100 of the motor and the temperature of the stator 100 .

[0035] Specifically, Possible values ​​are 0.30, 0.32, 0.34, 0.36, 0.38, 0.40, or 0.42.

[0036] In one embodiment, please refer to Figures 1 to 3 , and also satisfies: Understandably, The ratio of the thickness of the stator yoke 111 to the depth of the stator slot 113 is limited. The stator core 110 is the main path of the motor magnetic circuit, and the stator yoke 111 plays the role of the magnetic flux loop. The thickness of the stator yoke 111 directly affects the magnetic resistance and magnetic flux density. D2 is the diameter of the circular outline formed by the bottom of the stator slot 113. The difference between D2 and D3 reflects the radial depth of the stator slot 113. Controlling it within the range of 0.55 to 0.65 can ensure that the stator yoke 111 has sufficient thickness, thereby reducing magnetic resistance, reducing hysteresis and eddy current losses, and improving motor efficiency. At the same time, it ensures that the stator slot 113 has sufficient slot area to accommodate the winding, thereby reducing the temperature caused by it. Possible values ​​are 0.55, 0.56, 0.58, 0.60, 0.61, 0.63, or 0.65.

[0037] In one embodiment, please refer to Figures 1 to 3 , satisfying: , , , the number of slots per pole and phase of the motor is q, the number of phases of the motor is m, and q=Q / 2mP is set to satisfy: . It can be understood that the motor of this embodiment is a motor with low slot-pole matching and fractional slot concentrated winding design. The number Q of the stator slots 113 is controlled between 15 and 18, the number P of the rotor 200 pole pairs is controlled between 5 and 6, and GCD(Q, P) is 5 or 6, indicating that there is a strong periodic matching relationship between the stator 100 and the rotor 200, which helps to form a magnetomotive force distribution with a higher symmetry, thereby reducing the cogging torque fluctuation, reducing torque pulsation and electromagnetic noise. At the same time, the periodicity of the motor's cogging matching is enhanced, so that the harmonic order of the cogging torque is increased and its fundamental amplitude is reduced, thereby effectively suppressing the cogging torque fluctuation and reducing the vibration and noise during the operation of the motor. For example, when Q=18 and P=6, GCD(Q, P)=6, indicating that every 6 poles correspond to a complete magnetic circuit cycle; when Q=15 and P=5, GCD(Q, P)=5, indicating that every 5 poles correspond to a magnetic circuit cycle. In addition, the number of slots per pole per phase q satisfies , indicating that there are only one or two stator slots 113 under each pole, the windings are centrally wound, and the winding process is simplified, thus taking into account both the production cycle and the capacity of the winding equipment, ensuring production efficiency; the slot area utilization rate of the stator slots 113 is high, copper loss is low, and efficiency is high; the magnetomotive force waveform is close to sine, with low harmonic content and small torque ripple, which is conducive to lightweighting and miniaturization of the motor. Of course, in other embodiments, the number Q of stator slots 113, the number of pole pairs P of the rotor 200, and the number of phases m of the motor can also be adaptively adjusted according to different application scenarios of the compressor, such as Q taking 24, P taking 8, and GCD(Q,P) taking 8.

[0038] In one embodiment, please refer to Figure 1 and Figure 2 , satisfying: , . It can be understood that the motor D1 of this embodiment is between 90mm and 160mm, covering the outer diameter of small and medium-sized motors (such as permanent magnet synchronous motors, induction motors, switched reluctance motors, etc.), and is suitable for home appliances, power tools, servo systems, electric vehicle auxiliary systems, etc. Here, the motor can not only achieve a higher power density, but also take into account the manufacturing cost and assembly accuracy, and meet the development needs of lightweight, compact and efficient motors. D2 is the diameter of the circular outline formed by the bottom of the stator slot 113, which reflects the inner boundary position of the stator slot 113. D2 is controlled between 80mm and 130mm. Combined with the value of D1, it can ensure that the stator slot 113 has enough space to accommodate the winding, while retaining enough area of ​​the stator teeth 112 to support the magnetic flux path and mechanical strength. Wherein, D1 can be 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, 150mm or 160mm; D2 can be 80mm, 90mm, 100mm, 110mm, 120mm or 130mm, and the unit is mm. Of course, in other embodiments, D1 and D2 can also be adaptively adjusted according to different application scenarios of the compressor, such as D1 being 80mm or 165mm, or D2 being 75mm or 135mm.

[0039] In one embodiment, please refer to Figures 1 to 3 The rotor core in the rotor 200 and the stator core 110 in the stator 100 of the motor are both formed by laminating stamping sheets. Figures 1 to 3 The structural diagram is a projection diagram along the axial direction of the punching sheet.

[0040] The present invention further provides a compressor including a motor. The specific structure of the motor is as described above. Since the present compressor utilizes all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The compressor is configured as a rotary compressor.

[0041] In one embodiment, please refer to Figure 4 and Figure 7 The compressor further includes a pump body 300 and a housing 400. The housing 400 includes a main housing 430 and a first housing 410 and a second housing 420 provided at opposite ends of the main housing 430. The motor is located in the main housing 430. The outer periphery of the stator core 110 is fixed to the inner periphery of the main housing 430. The length of the main housing 430 in the axial direction of the compressor is h, and the thickness of the main housing 430 is t. The units of h and t are mm. Combined with D1 and D2, the following conditions are satisfied: . It should be noted that the compressor is configured as a vertical compressor, and the thickness t of the main shell 430 and the length h of the main shell 430 in the axial direction of the compressor are the average thickness and height of the main shell 430. The units of D1 and D2 are mm, and the motor is connected by fixing the outer periphery of the stator 100 and the main shell 430, such as welding, and interference fit. The thicker the thickness t of the main shell 430, the stronger the support of the main shell 430 to the stator core 110, and the higher the rigidity of the stator core 110. However, when the axial length h of the main shell 430 is larger, the center of gravity of the compressor is higher, the vibration of the compressor is more obvious, and the noise deterioration is more serious; and, as mentioned above about Description, in On the basis of taking a certain value, the larger the outer diameter D1 of the stator core 110 is, the greater the motor output torque is, and the greater the vibration of the motor is; on the basis of taking a certain value of D1, The larger the diameter, the thicker the stator yoke 111, the stronger the rigidity of the stator core 110, and the smaller the area of ​​the stator slot 113, which makes the temperature of the motor higher during operation and affects the reliability of the compressor.

[0042] like Figure 7 As shown, When the value is 0.8, the vibration of the compressor is 4.0m·s -2 , operating temperature is 80℃; When the value is 0.9, the vibration of the compressor is 2.8m·s -2 , operating temperature is 84.5℃; When the value is 0.95, the vibration of the compressor is 2.4m·s -2 , operating temperature is 87℃; When the value is 1.0, the vibration of the compressor is 2.0m·s -2 , operating temperature is 90℃; When the value is 1.08, the vibration of the compressor is 1.5m·s -2 , operating temperature is 93.5℃; When the value is 1.1, the vibration of the compressor is 1.4m·s -2 , operating temperature is 95.5℃; When the value is 1.2, the vibration of the compressor is 1.0m·s -2 , operating temperature is 100℃; When the value is 1.3, the vibration of the compressor is 0.7m·s -2 , operating temperature is 108.5℃; When the value is 1.4, the vibration of the compressor is 0.5m·s -2 , operating temperature is 112℃; When the value is 1.5, the vibration of the compressor is 0.4m·s -2, operating temperature is 120℃; When the value is 1.6, the vibration of the compressor is 0.25m·s -2 , operating temperature is 128℃.

[0043] It can be seen that when When the value is less than 0.95, the thickness of the main housing 430 is thin, the axial thickness of the main housing 430 in the compressor is high, the outer diameter of the stator core 110 is large, and the thickness of the stator yoke 111 is thin, resulting in greater vibration of the compressor and greater noise, affecting the user experience; when When the value is greater than 1.5, the thickness of the main housing 430 is large, and the thickness of the stator yoke 111 is also large. Although the vibration of the compressor is suppressed to a certain extent, the radial depth of the stator slot 113 is shallow, which reduces the slot area of ​​the stator slot 113 and increases the temperature of the motor during operation, affecting the reliability of the compressor. Between 0.95 and 1.5, the motor is installed on the compressor and the vibration of the compressor is 0.4m·s -2 to 2.4 m·s -2 The operating temperature of the compressor is between 87°C and 120°C, which can better balance the rigidity of the stator 100 of the motor and the temperature of the stator 100.

[0044] Furthermore, in this embodiment, Figure 7 As shown, When the value is 1.0, the vibration of the compressor is 2.0m·s -2 , operating temperature is 90℃; When the value is 1.08, the vibration of the compressor is 1.5m·s -2 , operating temperature is 93.5℃; When the value is 1.1, the vibration of the compressor is 1.4m·s -2 , operating temperature is 95.5℃; When the value is 1.2, the vibration of the compressor is 1.0m·s -2 , the operating temperature is 100℃. Between 1.0 and 1.2, the motor is installed on the compressor and the vibration of the compressor is 1.0m·s -2 Up to 2.0 m·s -2 The operating temperature of the compressor is between 90°C and 100°C, which can better balance the rigidity of the stator 100 of the motor and the temperature of the stator 100.

[0045] Specifically, Possible values ​​are 0.95, 1.0, 1.08, 1.1, 1.2, 1.3, 1.4, or 1.5.

[0046] In one embodiment, if Figure 4 As shown, the compressor is configured as a rotary compressor. The pump body 300 includes a crankshaft 310, bearings and a cylinder. The bearings are located at the axis of the rotor 200 of the motor. The crankshaft 310 is connected to the rotor 200 and rotates with the rotor 200. An inlet and an outlet are provided at the cylinder. The crankshaft 310 is driven to rotate by the rotor 200, thereby pulling the cylinder to switch between the inlet and the outlet to perform work.

[0047] The present invention further provides a refrigeration device including a compressor. The specific structure of the compressor is similar to that of the above-described embodiments. Since the present refrigeration device utilizes all the technical solutions of all the above-described embodiments, it at least has all the beneficial effects brought about by the technical solutions of the above-described embodiments, and thus will not be described in detail here. The refrigeration device can be configured as a refrigerator, air conditioner, etc.

[0048] The above description is merely an exemplary embodiment of the present invention and does not limit the scope of protection of the present invention. Any equivalent structural transformation made by using the contents of the present invention description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the scope of protection of the present invention.

Claims

1. A motor, characterized in that: include: a stator, the stator comprising a stator core and windings, the stator core comprising 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 forming a stator slot, the windings being disposed in the stator slots, the number of stator slots being Q, the maximum outer diameter of the stator core being D1, the maximum diameter of the circle formed by the bottoms of the plurality of stator slots being D2, and the minimum inner diameter of the stator core being D3; and a rotor rotatably mounted in the stator, wherein the number of pole pairs of the rotor is P; At the same time: and , where GCD(Q,P) is the greatest common divisor of Q and P, and the units of D1, D2, and D3 are mm.

2. The motor according to claim 1, wherein 。 3. The motor according to claim 1, wherein 。 4. The motor according to claim 1, wherein 。 5. The motor according to claim 1, wherein , , , the number of slots per pole and phase of the motor is q, the number of phases of the motor is m, and q=Q / 2mP is set to satisfy: .

6. The motor according to any one of claims 1 to 5, characterized in that ， 。 7. A compressor, characterized in that: The electric machine according to any one of claims 1 to 6, wherein the compressor is configured as a rotary compressor.

8. The compressor according to claim 7, wherein The compressor further includes a pump body and a housing. The housing includes a main housing and a first housing and a second housing provided at opposite ends of the main housing. The motor is located within the main housing. The outer periphery of the stator core is fixed to the inner periphery of the main housing. The length of the main housing in the axial direction of the compressor is h, and the thickness of the main housing is t. The units of h and t are mm, and the following conditions are satisfied: .

9. The compressor according to claim 8, wherein 。 10. A refrigeration device, characterized in that: Comprising the compressor according to any one of claims 7 to 9.

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