Stator structure, motor, compressor and heat exchange system

Abstract

The application provides a stator structure, a motor, a compressor and a heat exchange system, comprising at least two stator modules, the at least two stator modules are connected to form a stator core; each stator module has a first connecting structure, each stator module has a second connecting structure; the first connecting structure of each stator module is matched with the second connecting structure of an adjacent stator module; the second connecting structure of each stator module is matched with the first connecting structure of an adjacent stator module; the connecting position between each first connecting structure and the corresponding second connecting structure can be adjusted to adjust the size of the circumferential gap between the two adjacent stator modules. According to the stator structure, the motor efficiency is not reduced in the case of simply changing the output torque.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of heat exchange systems, and particularly relates to a stator structure, a motor, a compressor and a heat exchange system. BACKGROUND

[0002] At present, the displacement selection range of the piston compressor for the heat exchange system is 5.0cc-11.0cc, and different piston compressor displacements are selected according to the needs of application occasions. When the application occasion changes, the output torque of the motor inside the compressor will also change with the change of the piston compressor displacement.

[0003] However, the existing method can adopt a motor redesign scheme to ensure the high efficiency of the motor after the change of the motor output torque, which has problems such as complicated design process and long motor reprocessing cycle. If the motor structure parameters are not changed and the motor output torque is changed by adjusting the input current to adapt to the required power after the displacement of the compressor is reduced, the motor efficiency will be reduced.

[0004] Therefore, how to provide a stator structure, a motor, a compressor and a heat exchange system capable of changing the output torque without reducing the motor efficiency has become a problem that those skilled in the art need to solve. SUMMARY

[0005] Therefore, the technical problem to be solved by the present application is to provide a stator structure, a motor, a compressor and a heat exchange system that can change the output torque without reducing the motor efficiency.

[0006] In order to solve the above problems, the present application provides a stator structure, comprising at least two stator modules, the at least two stator modules being connected to form a stator core; each stator module has a first connecting structure, and each stator module has a second connecting structure; the first connecting structure of each stator module is matched with the second connecting structure of the adjacent stator module; the second connecting structure of each stator module is matched with the first connecting structure of the adjacent stator module; the connection position between each first connecting structure and the corresponding second connecting structure can be adjusted to adjust the size of the circumferential gap between the adjacent two stator modules.

[0007] Further, the first connecting structure is a connecting groove; the second connecting structure can extend into the corresponding connecting groove to be connected with the corresponding connecting groove; and the circumferential extension depth of the second connecting structure in the corresponding connecting groove can be adjusted to adjust the connection position between the second connecting structure and the corresponding connecting groove, and further adjust the size of the circumferential gap between the corresponding adjacent two stator modules.

[0008] Further, the circumferential length of the second connecting structure is greater than the circumferential depth of the connecting groove; when the second connecting structure extends into the groove bottom of the connecting groove, part of the second connecting structure is located outside the connecting groove, so that the corresponding adjacent two stator modules have a circumferential gap therebetween;

[0009] And / or, the stator core comprises a stator yoke; the connecting groove is arranged on the circumferential first side surface of the stator yoke; the depth of the connecting groove is Y1; wherein 0<Y1<2mm.

[0010] Further, the first connecting structure is provided with at least two first connecting pieces arranged in sequence in the circumferential direction; the second connecting structure is provided with at least one second connecting piece; each second connecting piece can be connected with any first connecting piece; when the second connecting piece is one, the second connecting piece is selectively connected with any first connecting piece; so as to adjust the connection position between each first connecting structure and the corresponding second connecting structure, and further adjust the size of the circumferential gap between the adjacent two stator modules.

[0011] Further, when the second connecting piece is more than two, each second connecting piece is selectively connected with the first connecting piece at different positions, so as to adjust the connection position between each first connecting structure and the corresponding second connecting structure, and further adjust the size of the circumferential gap between the adjacent two stator modules.

[0012] Further, the first connecting piece comprises a clamping groove arranged on the first connecting structure; the second connecting piece comprises a protrusion arranged on the second connecting structure, and the positions, shapes and sizes of the clamping groove and the protrusion are corresponding to each other.

[0013] Further, when the second connecting piece comprises a protrusion arranged on the second connecting structure, the protrusion comprises a tooth portion arranged on the second connecting structure; the tooth root distance of the tooth portion in the circumferential direction is Cx, and 0.3mm<Cx<2mm; and / or, the tooth height of the tooth portion is hx, 0.3mm<hx<5mm.

[0014] Further, the number of tooth portions is at least one; when the number of tooth portions is three, the tooth portions comprise a first tooth, a second tooth and a third tooth arranged in sequence on the second connecting structure, the stator module has a circumferential second side surface, the second connecting structure is arranged on the circumferential second side surface, the minimum distance between the first tooth and the circumferential second side surface is X1; the minimum distance between the second tooth and the circumferential second side surface is X2; the minimum distance between the third tooth and the circumferential second side surface is X3; wherein X2=αX1, X3=βX2, the relationship between β and α can be adjusted according to the displacement change of the compressor.

[0015] Further, β=2*α.

[0016] According to another aspect of the present application, a motor is provided, the motor comprising a stator structure as described above. The motor is a permanent magnet synchronous motor.

[0017] According to another aspect of the present application, a compressor is provided, the motor being as described above.

[0018] Further, a circumferential gap between two adjacent stator modules has a size of δ1; a displacement of the compressor is Pc, wherein δ1 and Pc are negatively correlated;

[0019] And / or, when the displacement of the compressor changes, the connection positions of the corresponding first connection structure and the second connection structure are adjusted, so as to adjust the size of the circumferential gap between the two adjacent stator modules.

[0020] Further, Wherein, δ x is a no-load working leakage ratio of the permanent magnet of the motor; α i is a calculation pole arc coefficient of the permanent magnet of the motor; φ m is a total magnetic flux of the permanent magnet of the motor, τ is a pole pitch of the motor, and L a is a stator stack height of the motor.

[0021] According to another aspect of the present application, a heat exchange system is provided, the compressor being as described above.

[0022] The stator structure, the motor, the compressor and the heat exchange system provided by the present application do not reduce the efficiency of the motor in the case of simply changing the output torque. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 FIG. 1 is a structure schematic diagram of a motor in an embodiment of the present application.

[0024] Figure 2 FIG. 2 is a structure schematic diagram of a stator module in some embodiments of the present application.

[0025] Figure 3 FIG. 3 is a structure schematic diagram of a stator module in some other embodiments of the present application.

[0026] Figure 4 FIG. 4 is a structure schematic diagram of a stator module in some embodiments of the present application.

[0027] Figure 5 FIG. 5 is a structure schematic diagram of a stator module in some embodiments of the present application.

[0028] Figure 6 FIG. 6 is a structure schematic diagram of a stator structure in an embodiment of the present application.

[0029] Figure 7 FIG. 7 is a structure schematic diagram of a stator lamination in an embodiment of the present application.

[0030] Figure 8 For the embodiment of the application, when the compressor is 9.0 cc displacement, the motor efficiency changes with the gap δ1.

[0031] Figure 9 For the embodiment of the application, when the compressor is 6.0 cc displacement, the motor efficiency changes with the gap δ1.

[0032] Figure 10 For the embodiment of the application, the motor efficiency is compared when the displacement is reduced without changing the gap δ1 and when the gap δ1 is changed.

[0033] 1, stator structure; 11, stator core; 12, stator module; 121, first connecting structure; 1211, first connecting piece; 12111, first clamping groove; 12112, second clamping groove; 12113, third clamping groove; 122, second connecting structure; 1221, second connecting piece; 12211, first tooth; 12212, second tooth; 12213, third tooth; 2, rotor structure; 21, rotor core; 22, magnetic steel; 3, winding. DETAILED DESCRIPTION

[0034] For reference Figures 1-10 As shown in the figure, a stator structure 1 includes at least two stator modules 12, and the at least two stator modules 12 are connected to form a stator core 11; each stator module 12 has a first connecting structure 121, and each stator module 12 has a second connecting structure 122; the first connecting structure 121 of each stator module 12 is adapted to the second connecting structure 122 of the adjacent stator module 12; the second connecting structure 122 of each stator module 12 is adapted to the first connecting structure 121 of the adjacent stator module 12; the connection position between each first connecting structure 121 and the corresponding second connecting structure 122 can be adjusted to adjust the size of the circumferential gap between the two adjacent stator modules 12.

[0035] For reference Figures 1-2 As shown in the figure, the stator of the application adopts a modular structure, which can facilitate the offline of the stator winding 3, improve the slot fill rate of the motor, and further improve the motor efficiency. As shown in the figure Figure 8 As shown in the figure, when the compressor is 9.0 cc displacement, the motor efficiency changes with the gap δ1; as shown in the figure Figure 9 As shown in the figure, when the compressor is 6.0 cc displacement, the motor efficiency changes with the gap δ1. Obviously, by adjusting the gap size between the stator modules 12, the change of the motor stator iron loss can be realized, and the change of the motor efficiency can be realized. By adjusting the size of the gap between the stator modules 12, the motor performance can be adjusted as needed under the premise that the main structural parameters of the motor remain unchanged.

[0036] Referring to Figure 10 As shown in the accompanying Figure 10 The large displacement initial motor refers to the motor efficiency when the compressor has a displacement of 11.0 cc; the direct use for small displacement refers to the motor efficiency when the aforementioned 1.0 cc displacement is reduced to 6.0 cc displacement; and the change in equivalent air gap refers to the motor efficiency after adjusting the size of the circumferential gap between the two adjacent stator modules 12 by adjusting the connection position between each first connection structure 121 and the corresponding second connection structure 122 when the aforementioned 1.0 cc displacement is reduced to 6.0 cc displacement.

[0037] Therefore, the present application can select the optimal modular gap according to the displacement requirement of the piston compressor and the motor efficiency under various working conditions, thereby ensuring efficient operation of the motor.

[0038] The present application can reasonably select the stator module 12 gap and the size of the air gap between the stator and the rotor according to the actual operating displacement of the compressor, thereby improving the motor efficiency without changing the main structural parameters of the motor, such as the stator outer diameter, the stator inner diameter, the rotor outer diameter, and the magnetic steel 22 structure, thereby reducing the calculation amount of the motor design scheme. Figure 7 As shown in the accompanying drawings, the present application utilizes the stator module 12 structure to cut more stator structures 1 on the same area of silicon steel sheet, and the modular punching sheet can process 50% more stator punching sheets under the condition of the same area. The modular punching die also increases the utilization rate of the punching sheet, thereby saving costs to a certain extent. Figure 3 As shown in the accompanying drawings, the stator is formed by laminating silicon steel sheets, and each stator module 12 comprises a stator core 11 and a winding 3. The winding 3 is wound around the stator core 11 for multiple turns, and the winding 3 is composed of copper wire wrapped with an insulating paint. The selection of the material of the winding 3 is not limited to copper wire, and materials such as aluminum wire are also suitable.

[0039] The present application can effectively improve the operating efficiency of the motor by adjusting the gap size between the motor stator modules 12, changing the stator iron loss of the motor, and improving the slot fill rate of the motor.

[0040] The stator structure 1 provided by the present application solves the problem that the main structural parameters of the motor need to be redesigned after the displacement of the compressor is changed, solves the problem that the utilization rate of the stator punching sheet is low when the stator punching sheet is opened, solves the problem that the output power changes and the motor efficiency decreases when the main parameters of the motor structure remain unchanged after the displacement of the compressor changes, and adjusts the motor performance by adjusting the connection position between the first connecting structure 121 and the corresponding second connecting structure 122 to adjust the size of the circumferential gap between the two adjacent stator modules 12, thereby solving the problems of fixing and gap selection when the stator modules 12 are spliced and improving the applicability of the stator structure 1. The first connecting structure 121 and the second connecting structure 122 are detachably connected, and the first connecting structure 121 and / or the second connecting structure 122 has a plurality of connection positions, and the first connecting structure 121 and the second connecting structure 122 are connected at different positions to adjust the size of the circumferential gap between the two adjacent stator modules 12. The first connecting structure 121 and the second connecting structure 122 are located between the corresponding two adjacent stator modules 12, and the connection position between the first connecting structure 121 and the second connecting structure 122 can be adjusted to change the total length of the first connecting structure 121 and the second connecting structure 122 between the two adjacent stator modules 12, thereby adjusting the size of the circumferential gap between the two adjacent stator modules 12. For example, the first connecting structure 121 and the second connecting structure 122 are both strip structures extending in the circumferential direction, when the end of the first connecting structure 121 is connected with the end of the second connecting structure 122, the total length of the first connecting structure 121 and the second connecting structure 122 between the two adjacent stator modules 12 is the longest, and the circumferential gap between the two adjacent stator modules 12 is the largest, when the head of the first connecting structure 121 is connected with the end of the second connecting structure 122, the total length of the first connecting structure 121 and the second connecting structure 122 between the two adjacent stator modules 12 is the shortest, and the circumferential gap between the two adjacent stator modules 12 is the smallest; the first connecting structure 121 and the second connecting structure 122 can be connected by mutual clamping; for example, the first connecting structure 121 can be a socket, and the second connecting structure 122 can be a hook. Figures 1-2 As shown in

[0041] As shown in Figure 2As shown, the stator module 12 includes a stator yoke and a stator tooth portion located at the inner circumferential side of the stator yoke, the stator yoke is an arc structure, and the outer periphery of the stator core 11 formed by a plurality of stator modules 12 is circular; in some embodiments of the present application, the outer shape of the permanent magnet synchronous motor stator is circular, and the number of stator teeth / slots is designed to be 6. The number of permanent magnet synchronous motor rotor permanent magnets is designed to be 4, which are bonded to the outer wall of the rotor core 21 by colloidal.

[0042] In some other embodiments of the present application, the stator yoke is a linear structure, and the outer periphery of the stator core 11 formed by a plurality of stator modules 12 is polygonal. The stator tooth portion is also provided with a winding 3. The first connecting structure 121 can extend in the circumferential direction or be linear, as long as it can change the circumferential gap between the stator modules 12.

[0043] In some embodiments of the present application, the first connecting structure 121 is a connecting groove; the second connecting structure 122 can extend into the corresponding connecting groove to connect with the corresponding connecting groove; and the circumferential extension depth of the second connecting structure 122 in the corresponding connecting groove can be adjusted to adjust the connection position between the second connecting structure 122 and the corresponding connecting groove, thereby adjusting the size of the circumferential gap between the corresponding adjacent two stator modules 12. That is, the connecting groove is provided on the circumferential first side of the stator module 12, and the second side of the stator module 12 is provided with a protruding second connecting structure 122. The second connecting structure 122 can be provided on the circumferential second side of the stator module 12, or on the outer or inner wall of the stator module 12. The extension direction of the second connecting structure 122 is from the circumferential second side to the direction away from the stator module 12. That is, the stator module 12 has a protruding end and a recessed end. Through the cooperation of the protruding end and the recessed end of the stator module 12, the fixation of the stator and the adjustment of the gap can be realized, so that the motor can be adjusted according to the actual application. That is, the deeper the circumferential depth of the second connecting structure 122 extending into the connecting groove, the shorter the total length of the first connecting structure 121 and the second connecting structure 122 between the adjacent two stator modules 12, and the smaller the circumferential gap between the adjacent two stator modules 12; the shallower the circumferential depth of the second connecting structure 122 extending into the connecting groove, the longer the total length of the first connecting structure 121 and the second connecting structure 122 between the adjacent two stator modules 12, and the larger the circumferential gap between the adjacent two stator modules 12.

[0044] In some embodiments of the present application, the circumferential length of the second connecting structure 122 is greater than the circumferential depth of the connecting groove; when the second connecting structure 122 extends to the bottom of the connecting groove, part of the second connecting structure 122 is located outside the connecting groove, so that there is a circumferential gap between the corresponding adjacent two stator modules 12; that is, there is a minimum gap between each stator module 12, which can effectively improve the efficiency of the motor.

[0045] The application further discloses some embodiments of the stator core 11, which comprises a stator yoke; a connecting groove is arranged on a circumferential first side surface of the stator yoke; and the connecting groove has a depth Y1; wherein 0 < Y1 < 2 mm.

[0046] The application further discloses some embodiments, wherein the first connecting structure 121 is provided with at least two first connecting pieces 1211 arranged in sequence in the circumferential direction; the second connecting structure 122 is provided with at least one second connecting piece 1221; each second connecting piece 1221 can be connected with any first connecting piece 1211; when the second connecting piece 1221 is one, the second connecting piece 1221 is selectively connected with any first connecting piece 1211; so as to adjust the connecting position between each first connecting structure 121 and the corresponding second connecting structure 122, and further adjust the size of the circumferential gap between the adjacent two stator modules 12; for example, the first connecting piece 1211 can be a bayonet, that is, the first connecting structure 121 is provided with a bayonet at different positions, and the second connecting piece 1221 is a hook, and one hook is connected with different bayonets to adjust the connecting position between the first connecting structure 121 and the corresponding second connecting structure 122.

[0047] The application further discloses some embodiments, wherein when the second connecting piece 1221 is more than two, each second connecting piece 1221 is selectively connected with the first connecting piece 1211 at different positions, so as to adjust the connecting position between each first connecting structure 121 and the corresponding second connecting structure 122, and further adjust the size of the circumferential gap between the adjacent two stator modules 12. For example, the first connecting piece 1211 can be a bayonet, that is, the first connecting structure 121 is provided with a bayonet at different positions, and the second connecting piece 1221 is a hook, and a plurality of hooks are connected with different bayonets; for reference Figure 6 For example, when the circumferential gap between the adjacent two stator modules 12 is the smallest, each hook is connected with the corresponding bayonet, and when the circumferential gap between the adjacent two stator modules 12 is the largest, only the first end hook is connected with the last bayonet; for reference Figure 1 When the circumferential gap between the adjacent two stator modules 12 is between the maximum and the minimum, a part of the hooks are connected with the corresponding bayonets, and the last several bayonets and the first several hooks are idle.

[0048] The application further discloses some embodiments, wherein the first connecting piece 1211 comprises a clamping groove arranged on the first connecting structure 121; when the first connecting piece 1211 is a connecting groove, the clamping groove is arranged on the inner wall of the connecting groove, for example, arranged in sequence on the inner wall of the connecting groove, that is, a plurality of clamping grooves are arranged in sequence in the depth direction of the connecting groove; and the second connecting structure 122 can be a hook or a protrusion matched with the clamping groove.

[0049] The present application also discloses some embodiments. The second connecting member 1221 includes a protrusion provided on the second connecting structure 122. The protrusion can be connected to the above-mentioned card slot.

[0050] The present application also discloses some embodiments. When the first connecting member 1211 includes a card slot provided on the first connecting structure 121 and the second connecting member 1221 includes a protrusion provided on the second connecting structure 122, the positions, shapes and sizes of the card slot and the protrusion correspond to each other. The first connecting structure 121 and the second connecting structure 122 are connected by concave-convex fitting.

[0051] The cross-sectional shapes of the protrusion and the card slot can also be triangular, rectangular, semi-circular and other shapes.

[0052] Refer to Figures 4-5 As shown, the present application also discloses some embodiments. When the second connecting member 1221 includes a protrusion provided on the second connecting structure 122, the protrusion includes a tooth portion provided on the second connecting structure 122. The root distance of the tooth portion in the circumferential direction is Cx, and 0.3 mm < Cx < 2 mm.

[0053] The present application also discloses some embodiments. The tooth height of the tooth portion is hx, and 0.3 mm < hx < 5 mm.

[0054] The present application also discloses some embodiments. The number of tooth portions is set to at least one. When the number of tooth portions is set to three, the tooth portions include a first tooth 12211, a second tooth 12212 and a third tooth 12213 sequentially provided on the second connecting structure 122. The stator module 12 has a circumferential second side surface. The second connecting structure 122 is provided on the circumferential second side surface. The minimum distance between the first tooth 12211 and the circumferential second side surface is X1. The minimum distance between the second tooth 12212 and the circumferential second side surface is X2. The minimum distance between the third tooth 12213 and the circumferential second side surface is X3. Among them, X2 = αX1, X3 = βX2, and the relationship between β and α can be adjusted according to the displacement change of the compressor. X1 < X2 < X3, in cooperation with the tooth root distance Cx of the mating teeth, and 0.3 mm < Cx < 2 mm, and the tooth root height hx of the mating teeth, and 0.3 mm < hx < 5 mm.

[0055] The card slot comprises a first card slot 12111, a second card slot 12112 and a third card slot 12113 arranged in sequence in the circumferential direction; the first card slot 12111, the second card slot 12112 and the third card slot 12113 are arranged in sequence between the slot bottom and the slot top; the depth of the slot, that is, the minimum distance between the first card slot 12111 and the control, is Y1; the minimum distance between the second card slot 12112 and the slot opening is Y2; the minimum distance between the third card slot 12113 and the slot opening is Y3; Y1>Y2>Y3; the width of the slot opening is Cy, and 0.3mm<Cy<2mm; the depth of the matching slot is hy, and 0.3mm<hy<5mm. X1=Y3, X2=Y2, X3=Y1, and 0<X3<2mm.

[0056] When the compressor displacement is 11.0cc, the designed motor matching position is X1; when the compressor displacement is reduced to 7.0cc-9.0cc, the matching position of the adjacent module can be converted from X1 to X2; when the compressor displacement is reduced to 5.0cc-7.0cc, the matching position of the adjacent module can be converted from X1 to X3.

[0057] When the compressor displacement is 5.0cc, the designed motor matching position is X3; when the compressor displacement is increased to 7.0cc-9.0cc, the matching position of the adjacent module can be converted from X3 to X2; when the compressor displacement is increased to 9.0cc-11.0cc, the matching position of the adjacent module can be converted from X3 to X1.

[0058] When the compressor displacement is 11.0cc, the preferred matching position between the modules of the stator core 11 is X1; by changing the matching mode between the stator matching teeth and the matching slot, the equivalent air gap width of the motor is changed, the magnetic field strength of the motor is changed, the modular structure improves the slot fill rate when the winding 3 is wired, under the condition that the number of turns is the same, the wire diameter of the winding 3 is increased, the resistance is reduced, so as to reduce the copper loss and the iron loss of the motor, and effectively improve the working efficiency of the motor. When the compressor displacement is reduced to 7.0cc-9.0cc, the matching position between the adjacent modules of the stator core 11 is preferably converted from X1 to X2; at this time, by changing the equivalent air gap length, the effective magnetic field strength of the air gap is changed, the iron loss of the motor is reduced, and the working efficiency of the motor can be improved. When the compressor displacement is constant, the curve of the motor efficiency with the change of the modular gap δ1 of the stator core 11 is as shown in Figure 8 When the compressor displacement is reduced to 5.0cc-7.0cc, the matching position between the adjacent modules of the stator core 11 is preferably converted from X2 to X3; at this time, by changing the equivalent air gap length, the effective magnetic field strength of the air gap is changed, the iron loss of the motor is reduced, and the working efficiency of the motor can be improved. When the compressor displacement is constant, the curve of the motor efficiency with the change of the modular gap δ1 of the stator core 11 is as shown in Figure 9 ;

[0059] When the application occasion changes, a small-capacity compressor needs to replace the large-capacity compressor that has been used, the capacity of the compressor is reduced, and the output power of the motor required is reduced accordingly. By taking the changed capacity range of the compressor as a standard, the matching relationship of X1, X2, and X3 is changed by changing different matching positions, the modular gap δ1 of the stator core 11 of different sizes is preferably selected, the output power of the motor is adjusted, the demand of the target working condition is met, and the motor efficiency is higher than that of directly applying the original motor scheme to the small-capacity compressor. The relationship between the two is shown in the following table. Figure 10 As shown in the table. The required motor output power of different-capacity compressors under different working condition requirements is different, and the situation is more complex, so it is not easy to define the selection range of the modular gap δ1. Therefore, the position matching relationship between the modules is still selected according to the change of the capacity of the compressor.

[0060] Some embodiments of the present application are also disclosed, and β=2*α.

[0061] According to another aspect of the present application, a motor is provided, and the motor comprises a stator structure 1, and the stator structure 1 is the stator structure 1 described above. The motor is a permanent magnet synchronous motor.

[0062] The permanent magnet synchronous motor of the present application comprises a stator structure 1 and a rotor structure 2, and the stator and the rotor have a certain length of air gap δ; the stator comprises a stator core 11 and a winding 3 wound on the tooth portion of the stator core 11, and the stator core 11 is in a block state and has a gap δ1 between each block; the rotor comprises a rotor core 21 and a magnetic steel 22, and a rivet hole can be formed on the rotor; the rotor structure 2 of the present application is not limited to the surface-mounted structure, and is also applicable to the built-in structure and the reluctance structure, and is not limited by the rotor structure 2. The number of stator slots and the number of permanent magnet poles applicable to the present application are not limited to the numbers listed, and are suitable for different pole-slot combinations.

[0063] According to another aspect of the present application, a compressor is provided, and the motor is the motor described above.

[0064] When the capacity of the compressor is fixed, the output torque of the motor is constant, the size of the modular gap δ1 of the stator core 11 is adjusted, the iron loss of the motor stator is changed, the efficiency of the motor can be changed, and the optimal efficiency of the motor can be achieved by selecting an appropriate value of δ1.

[0065] Some embodiments of the present application are also disclosed, and the size of the circumferential gap between the two adjacent stator modules 12 is δ1; the capacity of the compressor is Pc, and δ1 and Pc are negatively correlated;

[0066] Some embodiments of the present application are also disclosed, and when the capacity of the compressor changes, the connection position of the first connecting structure 121 and the second connecting structure 122 is adjusted, and then the size of the circumferential gap between the two adjacent stator modules 12 is adjusted.

[0067] The application also discloses some embodiments, wherein, δ x is the no-load working leakage ratio of the permanent magnet of the motor; α i is the pole arc coefficient of the permanent magnet of the motor; φ m is the total magnetic flux of the permanent magnet of the motor, τ is the pole pitch of the motor, L a is the stator stack height of the motor.

[0068] Preferably, 0.4 < δ x < 0.9, α i is the pole arc coefficient of the permanent magnet, preferably, 0.705 < α i < 0.896, φ m is the total magnetic flux of the permanent magnet, τ is the pole pitch of the motor, L a is the stator stack height of the motor, all of which are fixed values when the motor scheme is determined, and the design method meets the basic requirements of the motor. When the displacement changes, the motor scheme can be changed by changing the change range of δ1, without the need to redesign the key size.

[0069] The application also discloses some embodiments, when the displacement Pc of the compressor is 5.0cc-9.0cc, 0 < δ1 < 3mm; when the displacement Pc of the compressor is 9.0cc-11.0cc, 0.1mm < δ1 < 2mm.

[0070] When the displacement of the compressor is 5.0cc, the preferred design motor matching position is X3, when the compressor is increased to 7.0cc-9.0cc, the matching position of the adjacent module can be converted from X3 to X2, when the displacement of the compressor is increased from 5.0cc to 9.0cc-11.0cc, the matching position of the adjacent module can be converted from X3 to X1.

[0071] According to still another aspect of the application, a heat exchange system is provided, and the compressor is the above-mentioned compressor. The heat exchange system can be a refrigerator or other refrigeration system.

[0072] It is easy for those skilled in the art to understand that the above-mentioned advantageous modes can be freely combined and superimposed without conflict.

[0073] The above is only a preferred embodiment of the application, and is not used to limit the application, and any modification, equivalent replacement and improvement made within the spirit and principle of the application should be included in the protection scope of the application. The above is only a preferred embodiment of the application, and it should be pointed out that, for ordinary skilled in the art, without departing from the technical principles of the application, a number of improvements and modifications can be made, and these improvements and modifications should be regarded as the protection scope of the application.

Claims

1. A stator structure, characterized by, The application relates to a stator module assembly, which comprises at least two stator modules (12) connected to form a stator core (11); each stator module (12) has a first connecting structure (121) and a second connecting structure (122); the first connecting structure (121) of each stator module (12) is matched with the second connecting structure (122) of the adjacent stator module (12); the second connecting structure (122) of each stator module (12) is matched with the first connecting structure (121) of the adjacent stator module (12); the connecting position between each first connecting structure (121) and corresponding second connecting structure (122) can be adjusted to adjust the size of the circumferential gap between two adjacent stator modules (12); the first connecting structure (121) is provided with at least two first connecting pieces (1211) arranged in sequence in the circumferential direction; the second connecting structure (122) is provided with at least one second connecting piece (1221); each second connecting piece (1221) can be connected with any first connecting piece (1211); when the second connecting piece (1221) is one, the second connecting piece (1221) can be selectively connected with any first connecting piece (1211); the connecting position between each first connecting structure (121) and corresponding second connecting structure (122) is adjusted, and then the size of the circumferential gap between two adjacent stator modules (12) is adjusted.

2. The stator structure as defined in claim 1, wherein The first connecting structure (121) is a connecting groove; the second connecting structure (122) can extend into the corresponding connecting groove to be connected with the corresponding connecting groove; and the circumferential extension depth of the second connecting structure (122) in the corresponding connecting groove can be adjusted to adjust the connecting position between the second connecting structure (122) and the corresponding connecting groove, and then the size of the circumferential gap between two adjacent stator modules (12) is adjusted.

3. The stator structure as defined in claim 2, wherein The circumferential length of the second connecting structure (122) is greater than the circumferential depth of the connecting groove; when the second connecting structure (122) extends to the groove bottom of the connecting groove, part of the second connecting structure (122) is located outside the connecting groove, so that the corresponding two adjacent stator modules (12) have a circumferential gap; And / or, the stator core (11) comprises a stator yoke; the connecting groove is arranged on the circumferential first side surface of the stator yoke; the depth of the connecting groove is Y1; wherein 0 < Y1 < 2 mm.

4. The stator structure as defined in claim 1, wherein When the second connecting piece (1221) is provided in two or more, each of the second connecting pieces (1221) can be selectively connected with the first connecting pieces (1211) at different positions, so as to adjust the connection position between each of the first connecting structures (121) and the corresponding second connecting structure (122), and further adjust the size of the circumferential gap between the two adjacent stator modules (12).

5. The stator structure as defined in claim 1, wherein The first connecting piece (1211) comprises a clamping groove provided on the first connecting structure (121); and the second connecting piece (1221) comprises a protrusion provided on the second connecting structure (122), and the positions, shapes and sizes of the clamping groove and the protrusion are corresponding to each other.

6. The stator structure of claim 5, wherein The protrusion comprises a tooth portion provided on the second connecting structure (122); a root distance of the tooth portion in the circumferential direction is Cx, and 0.3mm < Cx < 2mm; and / or, a tooth height of the tooth portion is hx, and 0.3mm < hx < 5mm.

7. The stator structure as defined in claim 6, wherein The number of the tooth portions is provided as at least one; when the number of the tooth portions is provided as three, the tooth portions comprise a first tooth (12211), a second tooth (12212) and a third tooth (12213) provided on the second connecting structure (122) in sequence, the stator module (12) has a circumferential second side surface, the second connecting structure (122) is provided on the circumferential second side surface, a minimum distance between the first tooth (12211) and the circumferential second side surface is X1; a minimum distance between the second tooth (12212) and the circumferential second side surface is X2; and a minimum distance between the third tooth (12213) and the circumferential second side surface is X3; wherein X2 = aX1, X3 = bX2, and the relationship between b and a can be adjusted according to the displacement change of the compressor.

8. The stator structure of claim 7, wherein β=2*α。 9. An electric machine characterized by The motor comprises the stator structure according to any one of claims 1-8.

10. A compressor characterized by, The compressor comprises the motor according to claim 9.

11. The compressor of claim 10, wherein The size of the circumferential gap between the two adjacent stator modules (12) is d1; and the displacement of the compressor is Pc, wherein d1 and Pc are negatively correlated; And / or, when the displacement of the compressor changes, the connection position of the corresponding first connecting structure (121) and the second connecting structure (122) is adjusted, and further the size of the circumferential gap between the two adjacent stator modules (12) is adjusted.

12. The compressor of claim 11, wherein P c = ; wherein, is the no-load leakage flux ratio of the permanent magnet of the electric machine; is the pole arc factor of the permanent magnet of the electric machine; is the total magnetic flux of the permanent magnet of the electric machine, is the pole pitch of the electric machine, is the stator stack height of the electric machine.

13. A heat exchange system, characterized by, The heat exchange system comprises the compressor according to any one of claims 10-12.

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