Motor, compressor and refrigeration equipment

Abstract

The utility model discloses a motor, compressor and refrigeration equipment, and relates to the permanent magnet motor technology field, the motor comprises a stator iron core and a rotor, the stator iron core forms a stator notch at the inner periphery, and the minimum width of the stator notch along the circumferential direction is BS0; the rotor comprises a rotor iron core, the rotor iron core comprises a plurality of permanent magnet grooves distributed in the circumferential direction, inter-pole grooves are formed in the positions, between every two adjacent magnetic poles of the rotor, of the periphery of the rotor iron core in a concave mode, and broken bridges are formed between the inter-pole grooves and the two adjacent permanent magnet grooves and communicated with the inter-pole grooves. Each inter-electrode groove is provided with two groove pole walls distributed in the circumferential direction of the rotor iron core, the groove pole walls are arranged between the corresponding broken bridges and the periphery of the rotor iron core, the minimum gap between the two groove pole walls of each inter-electrode groove is W, the minimum size of each inter-electrode groove in the radial direction of the rotor iron core is L, and BS0 is larger than or equal to 2mm and smaller than or equal to 0.7 * W + 0.3 * L. The technical scheme provided by the utility model aims to weaken the cogging torque and torque pulsation of the motor, reduce the operation noise of the motor and guarantee the operation stability of the motor.

Description

TECHNICAL FIELD

[0001] The utility model relates to permanent magnet motor technical field, especially a kind of motor, compressor and refrigeration equipment. BACKGROUND

[0002] Motor is used in industry and daily life massively, and the requirement for motor efficiency is higher and higher, for various products of application motor, such as compressor etc. In the related art, recess is arranged to break the outer periphery of rotor core, to guide the direction of magnetic field, improve the magnetic flux of motor, and then improve motor efficiency, however, this design way and stator slot are prone to increase tooth slot torque and torque ripple, affect motor performance. SUMMARY

[0003] The main purpose of the utility model is to provide a kind of motor, compressor and refrigeration equipment, to weaken motor tooth slot torque and torque ripple, reduce motor operating noise and guarantee the running stability of motor.

[0004] To achieve the above object, the utility model provides a motor, which comprises:

[0005] A stator core, the inner periphery of the stator core is distributed with a plurality of stator teeth, the adjacent stator teeth are spaced to form a stator slot, the stator slot forms a stator slot opening in the inner periphery of the stator core, and the minimum width of the stator slot opening along the circumference is BS0; and

[0006] A rotor, the rotor is rotatably arranged in the inner periphery of the stator core, the rotor comprises a rotor core and a plurality of permanent magnets, the rotor core comprises a plurality of permanent magnet grooves distributed along the circumference, the permanent magnets are installed in the permanent magnet grooves, between the adjacent two magnetic poles of the rotor, the outer periphery of the rotor core is recessed to form an inter-pole slot, and the inter-pole slot and the adjacent permanent magnet groove form a broken bridge and are communicated.

[0007] Wherein, the inter-pole slot is provided with two slot pole walls distributed along the circumference of the rotor core, the slot pole walls are arranged between the corresponding broken bridge and the outer periphery of the rotor core, the minimum gap of the two slot pole walls of the inter-pole slot is W, the minimum size of the inter-pole slot in the radial direction of the rotor core is L, and it satisfies: 2mm≤BS0≤0.7×W+0.3×L.

[0008] In an embodiment, the stator core comprises a plurality of stacked stator laminations, the thickness of the stator lamination is ts1, the size of the stator slot opening in the radial direction of the stator core is HS0, and it satisfies: 2×ts1≤HS0≤1.5×W.

[0009] In an embodiment, the rotor core comprises a plurality of stacked rotor laminations, the thickness of the rotor laminations is ts2, the thickness of the permanent magnet is Hm in the axial projection plane of the rotor, and the W satisfies: 2*ts2<=W<=4*Hm.

[0010] In an embodiment, the rotor core comprises a plurality of stacked rotor laminations, the thickness of the rotor laminations is ts2, the maximum radius of the rotor is R1, and the L satisfies: ts2<=L<=R1.

[0011] In an embodiment, the maximum radius of the rotor is R1, the maximum radius of the stator core is R2, and 0.5<=R1 / R2<=0.67 is satisfied.

[0012] In an embodiment, the number of poles of the rotor is p, and the number of inter-pole slots is Q, and Q<=p is satisfied.

[0013] In an embodiment, the rotor core comprises an inner core and a plurality of outer cores, the plurality of outer cores are distributed at intervals around the outer periphery of the inner core and connect the outer periphery of the inner core through a connecting bridge, the permanent magnet slot is formed between the outer core and the inner core, the inter-pole slot is formed between two adjacent outer cores in the circumferential direction of the rotor core, the broken bridge is formed between the outer core and the inner core at the adjacent positions of the permanent magnet slot and the corresponding inter-pole slot, and the W is configured as the minimum gap between two adjacent outer cores in the circumferential direction of the rotor core.

[0014] In an embodiment, the stator core comprises a plurality of stacked stator laminations, the rotor core comprises a plurality of stacked rotor laminations, the rotor laminations and / or the stator laminations are formed by stamping, and / or the plurality of rotor laminations are riveted to form the rotor core, and the plurality of stator laminations are riveted to form the stator core.

[0015] The utility model also provides a kind of compressor, including the motor as described above.

[0016] The utility model also provides a kind of refrigeration equipment, including the compressor as described above.

[0017] The technical scheme of the utility model discloses that the rotor iron core is rotatably arranged at the inner periphery of the stator iron core, the outer periphery of the rotor iron core is concavely formed to form an inter-pole slot, the inter-pole slot is between the adjacent two magnetic poles of the rotor, and a broken bridge is formed between the inter-pole slot and the permanent magnet slot of the adjacent two magnetic poles and is communicated in a broken manner, the magnetic leakage of the permanent magnet is reduced, the magnetic flux of the motor is improved, and then the motor efficiency is improved, wherein the broken bridge between the inter-pole slot and the permanent magnet slot is away from the center of the rotor iron core, the inter-pole slot is provided with a slot pole wall, that is, the inter-pole slot is provided with a slot pole wall corresponding to an adjacent magnetic pole in the circumferential direction of the rotor iron core, the minimum gap W of the two slot pole walls of the inter-pole slot is taken, the stator slot opening of the stator iron core is opened at the inner periphery and is communicated with the stator slot, the stator slot opening and the inter-pole slot are adjacently distributed in the radial direction of the motor, the minimum size L of the stator slot opening in the circumferential direction of the stator iron core is taken, and the following is limited: 2mm <= BSO <= 0.7*W+0.3*L, so that the motor magnetic field distribution is changed, the harmonic content of the air gap magnetic field of the motor is reduced, the air gap magnetic field energy change is more smooth, the cogging torque is reduced, the above size relationship is helpful to change the magnetic resistance of the magnetic circuit of the motor, the inductance is affected, the inductance change is more uniform in a period, the torque ripple is effectively reduced, the motor operation noise is reduced, and the motor operation stability is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the structures shown in these drawings without creative labor for those skilled in the art.

[0019] Figure 1 The structure schematic view of the motor embodiment provided by the utility model is shown in the figure.

[0020] Figure 2 The structure schematic view of the motor embodiment provided by the utility model is shown in the figure. Figure 1 The structure schematic view of the rotor in the motor embodiment is shown in the figure.

[0021] Figure 3 The structure schematic view of the motor embodiment provided by the utility model is shown in the figure. Figure 1 The local enlarged view of A in the motor embodiment provided by the utility model is shown in the figure.

[0022] Figure 4 The structure schematic view of the motor another embodiment provided by the utility model is shown in the figure.

[0023] Figure 5 The structure schematic view of the rotor in the motor another embodiment provided by the utility model is shown in the figure. Figure 4 The structure schematic view of the rotor in the motor another embodiment provided by the utility model is shown in the figure.

[0024] Figure 6 The structure schematic view of the motor still another embodiment provided by the utility model is shown in the figure.

[0025] Figure 7 for Figure 6 Structure diagram of the rotor in the embodiment of the compressor;

[0026] Figure 8 for Figure 1 Structure diagram of the rotor in the embodiment of the compressor;

[0027] Figure 9 Structure diagram of the compressor in the embodiment of the compressor.

[0028] Explanation of reference numerals:

[0029] 100, rotor; 110, rotor core; 111, permanent magnet slot; 112, inter-pole slot; 113, slot-pole wall; 114, inner core; 115, outer core; 120, permanent magnet; 130, rivet hole; 140, rotor shaft hole; 150, through-flow hole; 160, broken bridge;

[0030] 200, stator core; 210, stator tooth; 220, stator slot; 221, stator slot opening; 300, pump body; 400, liquid storage tank.

[0031] The implementation, functional features and advantages of the present application will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0033] It should be noted that if the present application involves directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications will also change accordingly.

[0034] In addition, if the description of "first", "second" and the like is involved in the embodiments of the utility model, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can be explicitly or implicitly included at least one of the features. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0035] The utility model provides a motor.

[0036] Please refer to Figure 1 、 Figure 2 、 Figure 4 、 Figure 6 And Figure 8 , in an embodiment of the utility model, the motor includes:

[0037] Stator core 200, the inner periphery of stator core 200 is distributed with multiple stator teeth 210, adjacent stator teeth 210 interval forms stator slot 220, stator slot 220 forms stator slot mouth 221 at the inner periphery of stator core 200, and the minimum width of stator slot mouth 221 along the circumference is BS0;And

[0038] Rotor 100, rotor 100 is rotatably arranged at the inner periphery of stator core 200, and rotor 100 includes rotor core 110 and multiple permanent magnets 120, rotor core 110 includes multiple permanent magnet grooves 111 distributed along the circumference, permanent magnet 120 is installed in permanent magnet groove 111, and between adjacent two magnetic poles of rotor 100, the outer periphery of rotor core 110 is concave and forms inter-pole slot 112, and the inter-pole slot 112 and the adjacent permanent magnet groove 111 form a broken bridge 160 and are communicated;

[0039] Wherein, the inter-pole slot 112 is provided with two slot pole walls 113 distributed along the circumference of the rotor core 110, the slot pole wall 113 is arranged between the corresponding broken bridge 160 and the outer periphery away from the rotor core 110, the minimum gap of the two slot pole walls 113 of the inter-pole slot 112 is W, the minimum size of the inter-pole slot 112 in the radial direction of the rotor core 110 is L, and it satisfies: 2mm≤BS0≤0.7×W+0.3×L.

[0040] The technical scheme of the utility model discloses that the rotor core 110 is rotatably arranged at the inner periphery of the stator core 200, the outer periphery of the rotor core 110 is concavely formed with an inter-pole slot 112, the inter-pole slot 112 is between the adjacent two magnetic poles of the rotor 100, and the inter-pole slot 112 and the permanent magnet slot 111 of the adjacent two magnetic poles are both formed with a broken bridge 160 and are communicated in a broken manner, the magnetic leakage of the permanent magnet 120 is reduced, the magnetic flux of the motor is improved, and the motor efficiency is further improved, wherein the broken bridge 160 between the inter-pole slot 112 and the permanent magnet slot 111 is away from the center of the rotor core 110, the inter-pole slot 112 is provided with a slot pole wall 113, that is, the inter-pole slot 112 is provided with a slot pole wall 113 corresponding to an adjacent magnetic pole in the circumferential direction of the rotor core 110, the minimum gap W of the two slot pole walls 113 of the inter-pole slot 112 is taken, the stator core 200 is provided with a stator slot opening 221 communicated with the stator slot 220 at the inner periphery, the stator slot opening 221 and the inter-pole slot 112 are adjacently distributed in the radial direction of the motor, the minimum size L of the stator slot opening 221 in the circumferential direction of the stator core 200 is taken, and the following is limited: 2mm <= BS0 <= 0.7*W+0.3*L, so that the motor magnetic field distribution is changed, the harmonic content of the air gap magnetic field of the motor is reduced, the air gap magnetic field energy changes more smoothly, the cogging torque is reduced, the above size relationship helps to change the magnetic resistance of the magnetic circuit of the motor, the inductance is affected, the inductance changes more uniformly in a period, the torque ripple is effectively reduced, the motor operation noise is reduced, and the motor operation stability is ensured.

[0041] It should be noted that the shape of the slot pole wall 113 can be a straight line, a curve, a broken line or the like away from the center of the rotor core 110, the same inter-pole slot 112 is provided with two slot pole walls 113, and the minimum gap of the two slot pole walls 113 is represented as the minimum value of the chord direction value of the two slot pole walls 113 on the circle formed by the outer periphery of the rotor 100. Similarly, the minimum width BS0 of the stator slot opening 221 along the circumferential direction of the stator core 200 is also represented as the minimum value of the chord direction value of the two side walls of the stator slot opening 221 in the circumferential direction of the stator core 200 on the circle formed by the outer periphery of the stator. That is, the values of BS0 and W are straight line values. For the minimum size L of the inter-pole slot 112 in the radial direction of the rotor core 110, it is represented as the minimum value of the distance between the slot bottom wall formed between the two corresponding broken bridges 160 and the inner periphery of the stator core 200, minus the air gap distance between the rotor 100 and the stator.

[0042] Please refer to Figure 8, when the stator slot 221 width BS0 is 2mm, the cogging torque / rated torque is 2.6%, when the stator slot 221 width BS0 is 0.7*W+0.3*L, the cogging torque / rated torque is 2.7%, and when BS0 is between 2mm and 0.7*W+0.3*L, the cogging torque / rated torque remains stable, when the stator slot 221 width BS0 is greater than 0.7*W+0.3*L, the cogging torque / rated torque is greater than 2.7% and rises rapidly, and when BS0 is 1.4*W+0.6*L, the cogging torque / rated torque is greater than 4%. It can be seen that limiting BS0 to be between 2mm and 0.7*W+0.3*L can ensure that the cogging torque is at a low value, and the stability of the motor operation is ensured. The size values in the technical solution are in millimeters, such as BS0, W, L, HS0, Hm, R1, R2, ts1, ts2, and the like.

[0043] In an embodiment, referring to Figure 1 and Figure 3 , the stator core 200 includes a plurality of stacked stator laminations, the thickness of the stator laminations is ts1, and the size of the stator slot 221 in the radial direction of the stator core 200 is HS0, which satisfies: 2*ts1≤HS0≤1.5*W. It can be understood that when the depth of the stator slot 221 in the radial direction is greater than or equal to twice the thickness of the stator lamination, the stator slot 221 can disperse stress in a larger area, reduce local stress concentration, and make the stress distribution around the stator slot 221 more uniform, thereby improving the structural strength of the stator slot 221 when bearing electromagnetic force and mechanical force. At the same time, HS0 is less than or equal to 1.5W, which reduces the influence on the winding of the stator slot 220 and optimizes the magnetic field distribution to change the magnetic circuit of the magnetic field. At the same time, the size HS0 of the stator slot 221 in the radial direction of the stator core 200 is between 2ts1 and 1.5W, which makes the air gap magnetic field energy change more gently, reduces the fluctuation of the magnetic field energy in the rotation process of the rotor 100, and thereby reduces the cogging torque. In addition, limiting HS0 to be less than or equal to 1.5W affects the magnetic resistance of the magnetic circuit, thereby forming a stable inductance, which helps to reduce torque ripple. It should be noted that the size of the stator slot 221 in the radial direction of the stator core 200 is HS0, which is represented as: the distance between the points where the side wall of the stator slot 220 close to the inner circumference of the stator and the inner circumference of the stator respectively intersect with the extension lines of the side walls of the stator slot 221 distributed in the circumferential direction of the stator core 200. Of course, in other embodiments, the size of the stator slot 221 in the radial direction of the stator core 200 can also be set to be less than 2ts1 according to the specifications of the motor.

[0044] In an embodiment, referring to Figures 2 to 4, the rotor core 110 includes a plurality of stacked rotor laminations, the thickness of the rotor laminations is ts2, the thickness of the permanent magnet 120 in the axial projection plane of the rotor 100 is Hm, and W satisfies: 2 x ts2≤ W≤ 4 x Hm. When the minimum gap of the two slot pole walls 113 of the inter-pole slot 112 is greater than or equal to twice the thickness of the rotor laminations, it is beneficial to suppress the magnetic leakage of the permanent magnet 120 on the side adjacent to the inter-pole slot 112, reduce the disorder scattering of the magnetic field inside the rotor 100, and limit W to be less than or equal to 4Hm, so that the magnetic field is not easily leaked out of the inter-pole slot 112, but the magnetic field is better constrained in the effective area of the permanent magnet 120 and the rotor core 110, thereby participating more in the energy conversion process of the motor, thereby reducing the magnetic leakage. At the same time, after reducing the magnetic leakage of the permanent magnet 120, the air gap magnetic field is more uniform, the induced electromotive force in the stator winding is more stable during motor operation, thereby helping to reduce the current fluctuation in the stator winding, that is, to reduce the output current, and also to improve the magnetic field distribution of the motor, so that the influence of armature reaction is weakened, the reactive current in the stator winding is reduced, thereby reducing the copper loss, that is, improving the motor efficiency. It should be noted that the thickness Hm of the permanent magnet 120 is represented as: the width of the permanent magnet 120 in the axial projection plane of the rotor 100, which is also the magnetizing direction of the permanent magnet 120. Of course, in other embodiments, the minimum gap of the two slot pole walls 113 of the inter-pole slot 112 can be less than 2ts2, or greater than 4Hm according to the specifications of the motor.

[0045] In an embodiment, please refer to Figure 2 , Figure 5 and Figure 7 , the rotor core 110 includes a plurality of stacked rotor laminations, the thickness of the rotor laminations is ts2, the maximum radius of the rotor 100 is R1, and L satisfies: ts2≤ L≤ R1. When the radial dimension L of the inter-pole slot 112 is greater than or equal to the thickness of the rotor core 110, the inter-pole slot 112 provides sufficient space for the magnetic field to adjust the path, realizing the larger radial dimension of the inter-pole slot 112 to guide the magnetic field to be more reasonably distributed inside the rotor core 110, reducing the scattering of the magnetic field on the outer side of the rotor core 110. At the same time, the limitation that the radial dimension L of the inter-pole slot 112 is less than or equal to the maximum radius of the rotor core 110 effectively constrains the magnetic field in a reasonable area near the rotor core 110, avoiding the destruction of the normal distribution boundary of the magnetic field, thereby reducing the magnetic leakage on the outer side of the rotor core 110, so that more magnetic field energy can be used for effective work of the motor, and the output power of the motor will be correspondingly improved.

[0046] For the application size of the motor, in an embodiment, please refer to Figure 1 , Figure 4 and Figure 6, the maximum radius of the rotor 100 is R1, and the maximum radius of the stator core 200 is R2, and 0.5≤R1 / R2≤0.67 is satisfied. It can be understood that by limiting R1 / R2 to be between 0.5 and 0.67, the motor is configured as a small-size motor, and a smaller rotor 100 to stator radius ratio makes the interaction between the stator slot and the rotor 100 permanent magnet 120 more coordinated in space, so that the magnetic field coupling relationship between the stator and the rotor 100 is optimized, and then the magnetic resistance change between the stator tooth 210 and the rotor 100 permanent magnet 120 is more gentle, thereby reducing the cogging torque. And R1 / R2 is in the above range, so that the distribution of the air gap magnetic field in the circumferential direction is more uniform, so as to reduce the harmonic components in the air gap magnetic field, thereby reducing the cogging torque, and further improving the motor efficiency. Wherein, R1 / R2 can take values of 0.5, 0.53, 0.57, 0.59, 0.60, 0.63 or 0.67, etc. Of course, in other embodiments, according to different specifications of the motor, R1 / R2 can also take values less than 0.5 or greater than 0.67.

[0047] For the number of inter-pole slots 112 on the rotor core 110, in an embodiment, please refer to Figure 2 , Figure 5 and Figure 7 , the number of poles of the rotor 100 is p, and the number of inter-pole slots 112 is Q, and Q≤p is satisfied. It can be understood that when the number of inter-pole slots 112 is less than the number of poles of the rotor 100, the spacing between the magnetic poles of the rotor 100 is relatively large, the distribution of the magnetic field on the outer periphery of the rotor 100 is more continuous, and the magnetic field distribution on the outer periphery of the rotor 100 is more uniform, thereby reducing the sudden change and unevenness of the magnetic field, thereby reducing the cogging torque and improving the motor efficiency. Wherein, as shown in Figures 1 to 3 , Q is equal to p; as shown in Figure 4 and Figure 5 , Q is equal to p / 2; as shown in Figure 6 and Figure 7 , Q is equal to p / 4.

[0048] According to the above description, in an embodiment, W=4.4mm, L=1.32mm, Hm=1.5mm, ts1=ts2=0.35mm, and the rotor core 110 stack thickness L=40mm are taken, according to the above limiting requirements, the combination optimization of the stator slot opening 221 and the inter-pole slot 112 is realized, the motor cogging torque and torque ripple are effectively weakened, and the key frequency band noise of the motor is further reduced and the running stability is increased. Taking the size of the inter-pole slot 112 as the comparison reference, the cogging torque of the motor of the present technical solution is reduced by 5%, and the torque ripple is reduced by 4.6%.

[0049] In an embodiment, please refer to Figure 2 , Figure 5 andFigure 7 The rotor core 110 includes an inner core 114 and a plurality of outer cores 115, the plurality of outer cores 115 are spaced apart around the outer periphery of the inner core 114 and connect the outer periphery of the inner core 114 through the bridges, the permanent magnet slots 111 are formed between the outer core 115 and the inner core 114, the interpole slots 112 are formed between two adjacent outer cores 115 in the circumferential direction of the rotor core 110, the broken bridges 160 are formed between the outer core 115 and the inner core 114 at the adjacent positions of the permanent magnet slots 111 and the corresponding interpole slots 112, and the W is configured as the minimum gap between two adjacent outer cores 115 in the circumferential direction of the rotor core 110. It can be understood that the plurality of outer cores 115 are spaced apart around the outer periphery of the inner core 114 and connected through the bridges, the permanent magnet slots 111 are located between the outer core 115 and the inner core 114, and the broken bridges 160 are located at the end of the permanent magnet 120 away from the bridge, so that the magnetic circuit of the motor has a clear guiding property, the magnetic field generated by the permanent magnet 120 can be efficiently conducted along the path formed by the inner core 114, the outer core 115 and the bridge, thereby reducing the disordered scattering of the magnetic field, improving the conduction efficiency of the magnetic circuit, and optimizing the armature reaction. At the same time, the W is configured as the minimum gap between two adjacent outer cores 115 in the circumferential direction of the rotor core 110, which can prevent the magnetic field from leaking too much at the interpole slot 112, so that the magnetic circuit can better form a closed loop inside the rotor 100, thereby improving the efficiency of generating electromagnetic torque and improving the output torque.

[0050] In an embodiment, please refer to Figure 1 , Figure 4 and Figure 6The stator core 200 comprises a plurality of stacked stator laminations, and the rotor core 110 comprises a plurality of stacked rotor laminations; the rotor laminations and / or the stator laminations are formed by stamping, and / or the plurality of rotor laminations are riveted to form the rotor core 110, and the plurality of stator laminations are riveted to form the stator core 200. It can be understood that the rotor laminations and the stator laminations are formed by high-stamping process, which guarantees the structural stability of the rotor laminations and the stator laminations, and further guarantees the stability of the rotor 100 during high-speed and heavy-load operation. Without loss of generality, for the plurality of rotor laminations riveted to form the rotor core 110 or the plurality of stator laminations riveted to form the stator core 200, the riveting can be performed by rivets, or rivet points can be provided on the rotor laminations or the stator laminations, so that two adjacent rotor laminations or two adjacent stator laminations can be stably riveted. In the embodiment, rivet holes 130 are provided on the rotor laminations, and the plurality of rotor laminations are stacked to form the rotor core 110 by riveting, so as to guarantee the structural stability of the rotor core 110. In addition, a rotor shaft hole 140 is provided in the middle of the rotor core 110, and a rotating shaft is arranged in the rotor shaft hole 140. By the movement cooperation between the rotor 100 and the stator, the motor can output power to the outside through the rotating shaft in the rotor shaft hole 140. It can be known that the rotor shaft hole 140 and the rotating shaft are at least stable in the circumferential direction of the rotor 100. Of course, in other embodiments, the plurality of rotor laminations or the plurality of stator laminations can be stacked to form the rotor core 110 or the stator core 200 by welding.

[0051] The utility model discloses still a kind of compressor, which comprises motor, and the specific structure of the motor refers to above-mentioned embodiment, since the compressor adopts all technical solutions of above-mentioned embodiment, it at least has all beneficial effects brought by the technical solutions of above-mentioned embodiment, which will not be repeated here.

[0052] In an embodiment, please refer to Figure 1 、 Figure 4 And Figure 7 The rotor core 110 is provided with a through-flow hole 150, and the refrigerant in the compressor and the lubricating oil rotating with the rotor 100 are arranged together and form a circulation through the through-flow hole 150 on the rotor core 110, the gap between the stator and the compressor shell, and the air gap between the stator and the rotor 100. The motor can be cooled to reduce the influence of motor efficiency reduction caused by eddy current loss. At the same time, the motor shell and the compressor shell can be configured as the same component to reduce the number of components in the compressor and improve the compactness of the compressor, i.e., reduce the volume of the compressor. Of course, in other embodiments, the motor can be assembled and formed before being installed on the compressor, and the motor has its own motor shell.

[0053] For the structure of the compressor, as Figure 9As shown, the compressor is provided with a motor, and a pump body 300 is arranged below the motor, the pump body 300 is used to pump the refrigerant and lubricating oil in the compressor to the rotor 100, the circulation of the lubricating oil is realized by the through-flow hole 150 on the rotor core 110, the gap between the stator and the shell, and the refrigerant and the lubricating oil are separated to enter the refrigerant circuit, so that the volume of the compressor is reduced. Correspondingly, the compressor is also provided with a liquid storage tank 400, the liquid storage tank 400 can balance the refrigerant circulation amount of the refrigerant circuit under different working conditions, ensure the stable work of the evaporator and the condenser, and prevent the liquid refrigerant that is not completely evaporated from entering the compressor, avoid liquid strike damage to the compressor components.

[0054] The utility model discloses still propose a kind of refrigeration equipment, and the refrigeration equipment includes motor or compressor, and the specific structure of the motor or compressor refers to above-mentioned embodiment, since the refrigeration equipment of the present application adopts all technical solutions of above-mentioned all embodiments, at least have all beneficial effects brought by the technical scheme of above-mentioned embodiment, here no longer one by one elaboration. Among them, refrigeration equipment can be configured as refrigerator, air conditioner etc.

[0055] The above-mentioned is only the exemplary embodiment of the utility model, and does not limit the patent range of the utility model, and all equivalent structural transformations made by the utility model specification and the attached drawings under the technical concept of the utility model, or direct / indirect application in other related technical fields are included in the patent protection range of the utility model.

Claims

1. An electric machine characterized in that, The motor comprises: a stator core, an inner periphery of the stator core being provided with a plurality of stator teeth, adjacent stator teeth being spaced apart to form a stator slot, the stator slot forming a stator slot opening at the inner periphery of the stator core, a minimum width of the stator slot opening in the circumferential direction being BS0; and a rotor, the rotor being rotatably arranged in the inner periphery of the stator core, the rotor comprising a rotor core and a plurality of permanent magnets, the rotor core comprising a plurality of permanent magnet slots distributed in the circumferential direction, the permanent magnets being arranged in the permanent magnet slots, between two adjacent magnetic poles of the rotor, an outer periphery of the rotor core being recessed to form an inter-pole slot, the inter-pole slot and the adjacent permanent magnet slots being connected through a broken bridge; wherein the inter-pole slot is provided with two slot pole walls distributed in the circumferential direction of the rotor core, the slot pole walls being arranged between the corresponding broken bridge and the outer periphery of the rotor core, a minimum gap between the two slot pole walls of the inter-pole slot being W, a minimum size of the inter-pole slot in the radial direction of the rotor core being L, and satisfying: 2mm≤BS0≤0.7×W+0.3×L.

2. The electric machine of claim 1, wherein, The stator core comprises a plurality of stacked stator laminations, a thickness of the stator laminations being ts1, a size of the stator slot opening in the radial direction of the stator core being HS0, and satisfying: 2×ts1≤HS0≤1.5×W.

3. The electric machine of claim 1, wherein, The rotor core comprises a plurality of stacked rotor laminations, a thickness of the rotor laminations being ts2, a thickness of the permanent magnets in the axial projection plane of the rotor being Hm, and the W satisfying: 2×ts2≤W≤4×Hm.

4. The electric machine of claim 1, wherein, The rotor core comprises a plurality of stacked rotor laminations, a thickness of the rotor laminations being ts2, a maximum radius of the rotor being R1, and the L satisfying: ts2≤L≤R1.

5. The electric machine of claim 1, wherein, A maximum radius of the rotor is R1, a maximum radius of the stator core is R2, and satisfying: 0.5≤R1 / R2≤0.

67.

6. The electric machine of claim 1, wherein, A number of poles of the rotor is p, a number of the inter-pole slots is Q, and satisfying: Q≤p.

7. The electric machine of any one of claims 1 to 6, wherein, The rotor core comprises an inner core and a plurality of outer cores, the plurality of outer cores being spaced apart and distributed around the outer periphery of the inner core, and connecting the outer periphery of the inner core through a connecting bridge, the outer cores and the inner core forming the permanent magnet slots therebetween; The inter-pole slot is formed between two adjacent outer cores in the circumferential direction of the rotor core, the broken bridge is formed between the outer core and the inner core at the adjacent position of the permanent magnet slot and the corresponding inter-pole slot, and the W is configured as a minimum gap between two adjacent outer cores in the circumferential direction of the rotor core.

8. The electric machine of claim 1, wherein, The stator core comprises a plurality of stacked stator laminations, and the rotor core comprises a plurality of stacked rotor laminations. The rotor laminations and / or the stator laminations are formed by stamping, and / or the plurality of rotor laminations are riveted to form the rotor core, and the plurality of stator laminations are riveted to form the stator core.

9. A compressor characterized by, The motor comprises any one of the motors according to claims 1 to 8.

10. A refrigeration appliance characterized in that, The compressor comprises the motor according to claim 9.

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