A modular same-pole same-slot permanent magnet motor based on unit phase

Abstract

The present invention belongs to the technical field of permanent magnet motors, and discloses a modular same-pole same-slot permanent magnet motor based on unit phase, including: a stator and a rotor; wherein the stator includes a plurality of identical stator modules, and the rotor is concentrically arranged in the stator; the number of stator modules is the same as the number of phases of the modular same-pole same-slot permanent magnet motor, and the stator windings of each stator module correspond to the respective phase power supplies of the modular same-pole same-slot permanent magnet motor; it should be emphasized that each stator module in the stator is offset one by one by a first predetermined angle in the circumferential direction; or, each permanent magnet in the rotor is axially segmented, each segment of the permanent magnet axially corresponds to each stator module in the stator, each stator module in the stator is not offset in the circumferential direction, and each segment of the permanent magnet is offset one by one by a second predetermined angle. The present invention can reduce the cogging torque of the motor, and at the same time can reduce the unbalanced magnetic pull suffered by the motor and the difficulty of manufacturing the motor.

Description

Technical Field

[0001] The invention belongs to the technical field of permanent magnet motors, and in particular relates to a modular same-pole and same-slot permanent magnet motor based on unit phases. Background Art

[0002] The cogging torque of permanent magnet motors is one of the key issues that must be considered in the design and manufacture of permanent magnet motors. It has an important impact on high-precision control, robot joints and other fields, and restricts the development of the manufacturing industry. Specifically, the cogging torque is the torque generated by the interaction between the permanent magnet and the stator core when the permanent magnet motor winding is not energized. It is caused by the tangential component of the interaction force between the permanent magnet and the armature teeth. When the rotor of the permanent magnet motor rotates, the magnetic permeability on both sides of the permanent magnet corresponding to the stator slot changes significantly in a small range, causing changes in the magnetic field energy storage, thereby generating cogging torque. The cogging torque has many effects on the performance of the permanent magnet motor, such as stability, efficiency, life and control performance.

[0003] At present, the conventional methods for reducing the cogging torque in the existing technical solutions mainly include slot misalignment, rotor pole skew and stator slot skew, etc. All of the above existing methods reduce the cogging torque by changing the phase difference of the cogging torque generated by different laminations, which will reduce the output performance of the motor.

[0004] In view of the defects of the above-mentioned traditional methods, a Chinese invention patent application with authorization announcement number CN114050671B proposes a permanent magnet motor with the same pole and slot, which mainly achieves the equality of the number of motor poles and the number of slots through the combination of multi-pole and few-slot and few-pole and multi-slot unit motors, and the misalignment of the slots of different unit motors achieves the reduction of the motor cogging torque. However, in the above-mentioned permanent magnet motor with the same pole and slot, the motor is subjected to a large unbalanced magnetic pull due to the axial non-uniformity; in addition, due to the different sizes of the slots, the processing and winding of the stator core are very difficult. Summary of the invention

[0005] The purpose of the present invention is to provide a modular same-pole same-slot permanent magnet motor based on unit phase to solve one or more of the above-mentioned technical problems. The technical solution provided by the present invention can reduce the cogging torque of the motor, and at the same time can reduce the unbalanced magnetic pull on the motor and the difficulty of manufacturing the motor.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a modular same-pole same-slot permanent magnet motor based on a unit phase, comprising:

[0008] A stator, wherein the stator comprises a plurality of identical stator modules, wherein the stator modules comprise a stator core, stator teeth formed on the stator core, and stator windings arranged on the stator teeth;

[0009] A rotor, comprising a rotor core and a plurality of permanent magnets uniformly distributed on the rotor core in a circumferential direction;

[0010] in,

[0011] The rotor is concentrically arranged in the stator; the number of the stator modules is the same as the number of phases of the modular same-pole and same-slot permanent magnet motor, and the stator windings of each stator module are independent of each other, and the stator windings of each stator module respectively correspond to the respective phase power supplies of the modular same-pole and same-slot permanent magnet motor;

[0012] Each stator module in the stator is offset one by one by a first predetermined angle in a circumferential direction.

[0013] A further improvement of the present invention is that

[0014] The number of phases of the modular same-pole same-slot permanent magnet motor based on unit phase is a1, the number of pole pairs of the permanent magnet is b1, and the calculation expression of the first predetermined angle c1 is:

[0015] c1=360°÷(a1×b1).

[0016] A further improvement of the present invention is that

[0017] The axial lengths of the permanent magnets and the rotor core in the rotor are both greater than the total axial length of the stator cores of all stator modules in the stator after assembly.

[0018] A further improvement of the present invention is that

[0019] The number of stator teeth in the stator module is twice the number of pole pairs of the permanent magnets in the rotor.

[0020] A further improvement of the present invention is that

[0021] The modular same-pole same-slot permanent magnet motor based on unit phase is a three-phase 12-pole 12-slot modular same-pole same-slot permanent magnet motor;

[0022] The stator of a three-phase 12-pole 12-slot modular same-pole and same-slot permanent magnet motor includes a first stator module, a second stator module and a third stator module; wherein the offset angle of the second stator module compared to the first stator module is 20°, and the offset angle of the third stator module compared to the first stator module is 40°.

[0023] In a second aspect, the present invention provides a modular same-pole same-slot permanent magnet motor based on a unit phase, comprising:

[0024] A stator, wherein the stator comprises a plurality of identical stator modules, wherein the stator modules comprise a stator core, stator teeth formed on the stator core, and stator windings arranged on the stator teeth;

[0025] A rotor, comprising a rotor core and a plurality of permanent magnets uniformly distributed on the rotor core in a circumferential direction;

[0026] in,

[0027] The rotor is concentrically arranged in the stator; the number of the stator modules is the same as the number of phases of the modular same-pole and same-slot permanent magnet motor, and the stator windings of each stator module are independent of each other, and the stator windings of each stator module respectively correspond to the respective phase power supplies of the modular same-pole and same-slot permanent magnet motor;

[0028] Each permanent magnet in the rotor is axially segmented, each segment of the permanent magnet axially corresponds to each stator module in the stator, each stator module in the stator is not offset in the circumferential direction, and each segment of the permanent magnet is offset by a second predetermined angle one by one.

[0029] A further improvement of the present invention is that

[0030] The number of phases of the modular same-pole same-slot permanent magnet motor based on unit phase is a2, the number of pole pairs of the permanent magnet is b2, and the calculation expression of the second predetermined angle c2 is:

[0031] c2=360°÷(a2×b2).

[0032] A further improvement of the present invention is that

[0033] The axial lengths of the permanent magnets and the rotor core in the rotor are both greater than the total axial length of the stator cores of all stator modules in the stator after assembly.

[0034] A further improvement of the present invention is that

[0035] The number of stator teeth in the stator module is twice the number of pole pairs of the permanent magnets in the rotor.

[0036] A further improvement of the present invention is that

[0037] The modular same-pole same-slot permanent magnet motor based on unit phase is a three-phase 12-pole 12-slot modular same-pole same-slot permanent magnet motor;

[0038] The stator of a three-phase 12-pole 12-slot modular same-pole and same-slot permanent magnet motor includes a first stator module, a second stator module and a third stator module; the permanent magnets in the rotor of the three-phase 12-pole 12-slot modular same-pole and same-slot permanent magnet motor are axially divided into a first section of permanent magnets, a second section of permanent magnets and a third section of permanent magnets, corresponding to the first stator module, the second stator module and the third stator module respectively; wherein the first stator module, the second stator module and the third stator module are not offset in the circumferential direction, the offset angle of the second section of permanent magnets compared to the first section of permanent magnets is 20°, and the offset angle of the third section of permanent magnets compared to the first section of permanent magnets is 40°.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] In the modular same-pole and same-slot permanent magnet motor based on unit phase disclosed by the present invention, a plurality of mutually independent stator modules are designed. By means of the technical means that the permanent magnets of the rotor are not axially segmented and each stator module is mutually offset by a first predetermined angle in the circumferential direction, the stator modules are arranged in different positions relative to the permanent magnets. By arranging the plurality of stator modules in a staggered manner in the circumferential direction, the cogging torque of the motor can be effectively reduced. In addition, the use of the same stator modules in the stator can not only simplify the design and manufacturing process of the motor, but also greatly reduce the difficulty of processing and assembly, improve the efficiency of processing and assembly, and also help to improve the production quality and consistency of the motor. Furthermore, the same stator module structure can reduce the unbalanced magnetic pull to which the motor is subjected during operation, so that the motor is more stable during operation, can reduce vibration and noise, and can extend the service life of the motor to a certain extent.

[0041] In the modular same-pole and same-slot permanent magnet motor based on unit phase disclosed in the present invention, each permanent magnet of the rotor is further axially divided into multiple sections, each section of the permanent magnet axially corresponds to each stator module, each stator module is not offset in the circumferential direction, and each section of the permanent magnet is offset from each other by a second predetermined angle. This technical means can also realize different position layouts of the stator modules relative to the permanent magnets, thereby effectively reducing the cogging torque of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below; obviously, the drawings described below are some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0043] Figure 1 is a schematic diagram of a modular same-pole same-slot permanent magnet motor based on unit phase in an embodiment of the present invention;

[0044] Figure 2 yes Figure 1 In the illustrated embodiment, a schematic diagram of the winding distribution corresponding to the first stator module;

[0045] Figure 3 yes Figure 1 In the illustrated embodiment, a schematic diagram of the winding distribution corresponding to the second stator module;

[0046] Figure 4 yes Figure 1 In the illustrated embodiment, a schematic diagram of the winding distribution corresponding to the third stator module;

[0047] Figure 5 is a schematic diagram of a structure in which the rotor is not axially segmented and the stator modules are offset in an embodiment of the present invention;

[0048] Figure 6 is a schematic diagram of a structure in which the rotor is axially offset in sections and the stator module is not offset in an embodiment of the present invention;

[0049] The reference numerals in the accompanying drawings are explained as follows:

[0050] 1. stator; 11. first stator module; 12. second stator module; 13. third stator module; 111. stator core; 112. stator winding;

[0051] 2. rotor; 21. permanent magnet; 22. rotor core. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments and technical solutions are only part of the embodiments of the present invention, not all of the embodiments.

[0053] All other embodiments obtained by those of ordinary skill in the art without creative work based on the technical solutions disclosed in the embodiments of the present invention belong to the scope of protection of the present invention. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device including a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0054] In an embodiment of the present invention, a modular same-pole same-slot permanent magnet motor based on a unit phase is provided, which specifically includes:

[0055] A stator 1, wherein the stator 1 comprises a plurality of identical stator modules, wherein the stator modules comprise a stator core 111, stator teeth formed on the stator core 111, and stator windings 112 disposed on the stator teeth; further specifically explained, the arrangement manner and number of winding turns of the stator windings 112 of each stator module are the same, and the shape of each stator module and the number of stator teeth are the same;

[0056] The rotor 2 includes a rotor core 22 and a plurality of permanent magnets 21 uniformly distributed on the rotor core 22 in a circumferential direction;

[0057] In which, the rotor 2 is concentrically arranged in the stator 1; the number of the stator modules is the same as the number of phases of the modular same-pole and same-slot permanent magnet motor, and the stator windings 112 of each stator module are independent of each other, and the stator windings 112 of each stator module respectively correspond to each phase power supply of the modular same-pole and same-slot permanent magnet motor; the number of stator teeth in the stator module is twice the number of pole pairs of the permanent magnet 21 in the rotor 2; the permanent magnets 21 in the rotor 2 are not segmented axially, and the stator modules in the stator 1 are offset one by one in the circumferential direction by a first predetermined angle.

[0058] In the technical solution provided in the embodiment of the present invention, a plurality of independent stator modules are designed, and by means of the technical means that the permanent magnets of the rotor are not axially segmented and each stator module is offset from each other by a first predetermined angle in the circumferential direction, the stator modules are arranged in different positions relative to the permanent magnets. By staggered arrangement of the plurality of stator modules in the circumferential direction, the cogging torque of the motor can be effectively reduced. To further explain, the cogging torque is an undesirable torque fluctuation generated when the motor is running, which affects the stability and precision of the motor. Through the modular staggered design in the technical solution of the embodiment of the present invention, the interaction between each stator module and the permanent magnet can be made more uniform, thereby reducing such fluctuation and improving the operating performance of the motor. In addition, the technical solution of the embodiment of the present invention also pays attention to the uniformity and standardization of the stator module structure. The structure of each stator module, the number of stator teeth, the winding arrangement of the stator winding, etc. are all consistent, which can not only simplify the design and manufacturing process of the motor, but also greatly reduce the difficulty of processing and assembly; further explanatory, in motor manufacturing, the precise control of the stator is the key to ensure the stability of motor performance. The technical solution of the embodiment of the present invention adopts the same stator module structure to make the processing and assembly process more efficient, and also helps to improve the production quality and consistency of the motor. More importantly, due to the same structure of the stator module, the unbalanced magnetic pull on the circumference of the motor during operation is also reduced accordingly; further explanatory, the unbalanced magnetic pull is a harmful force generated when the motor is running, which will cause vibration and noise of the motor, and even affect the service life of the motor. By adopting the same stator module structure, the motor can be more stable during operation, reduce vibration and noise, and thus extend the service life of the motor. To sum up, in the technical solution of the embodiment of the present invention, by cleverly designing the structure and relative position of multiple stator modules, not only the cogging torque and unbalanced magnetic pull of the motor are effectively reduced, but also the processing and assembly efficiency of the motor are improved, providing strong support for improving the performance of the motor and reducing the manufacturing cost.

[0059] In an embodiment of the present invention, a modular same-pole same-slot permanent magnet motor based on a unit phase is provided, which specifically includes:

[0060] A stator 1, wherein the stator 1 comprises a plurality of identical stator modules, wherein the stator modules comprise a stator core 111, stator teeth formed on the stator core 111, and stator windings 112 arranged on the stator teeth;

[0061] The rotor 2 includes a rotor core 22 and a plurality of permanent magnets 21 uniformly distributed on the rotor core 22 in a circumferential direction;

[0062] Among them, the rotor 2 is concentrically arranged in the stator 1; the number of the stator modules is the same as the number of phases of the modular same-pole and same-slot permanent magnet motor, and the stator windings 112 of each stator module are independent of each other, and the stator windings 112 of each stator module respectively correspond to each phase power supply of the modular same-pole and same-slot permanent magnet motor; the number of stator teeth in the stator module is twice the number of pole pairs of the permanent magnet 21 in the rotor 2; each permanent magnet 21 in the rotor 2 is axially segmented, and each segment of the permanent magnet 21 axially corresponds to each stator module in the stator, each stator module in the stator 1 is not offset in the circumferential direction, and each segment of the permanent magnet 21 is offset by a second predetermined angle one by one.

[0063] In the technical solution disclosed in the embodiment of the present invention, each permanent magnet in the rotor is axially segmented, each segment of the permanent magnet axially corresponds to each stator module in the stator, each stator module in the stator is not offset in the circumferential direction, and each segment of the permanent magnet is offset one by one by a second predetermined angle. This technical means also realizes different position layouts of the stator modules relative to the permanent magnets. By staggered arrangement of multiple stator modules in the circumferential direction, the cogging torque of the motor can be effectively reduced.

[0064] In one embodiment of the present invention, for a modular same-pole same-slot permanent magnet motor based on a unit phase with a phase number of a1 and a permanent magnet pole pair number (i.e., a motor pole pair number) of b1, the calculation expression of the first predetermined angle c1 is:

[0065] c1=360°÷(a1×b1).

[0066] In one embodiment of the present invention, for a modular same-pole same-slot permanent magnet motor based on a unit phase with a phase number of a2 and a permanent magnet pole pair number (i.e., a motor pole pair number) of b2, the calculation expression of the second predetermined angle c2 is:

[0067] c2=360°÷(a2×b2).

[0068] In one embodiment of the present invention, the axial lengths of the permanent magnets 21 and the rotor core 22 are both greater than the total axial length of the stator cores 111 of each stator module after assembly, so as to ensure the output of torque.

[0069] See also Figure 1 In one embodiment of the present invention, the modular same-pole same-slot permanent magnet motor based on unit phase is a three-phase motor, which specifically includes:

[0070] A stator 1, wherein the stator 1 comprises a first stator module 11, a second stator module 12 and a third stator module 13 which are completely identical, wherein the first stator module 11, the second stator module 12 and the third stator module 13 each comprise a stator core 111, stator teeth formed on the stator core 111 and a stator winding 112 arranged on the stator teeth;

[0071] The rotor 2 includes a rotor core 22 and a plurality of permanent magnets 21 uniformly distributed on the rotor core 22 in a circumferential direction;

[0072] The rotor 2 is concentrically arranged in the stator; the stator windings 112 of the first stator module 11, the second stator module 12 and the third stator module 13 are independent of each other, and the stator windings 112 of the first stator module 11, the second stator module 12 and the third stator module 13 respectively correspond to the three-phase power supply of the modular same-pole and same-slot permanent magnet motor; the number of stator teeth in the stator module is twice the number of pole pairs of the permanent magnet 21 in the rotor 2;

[0073] In addition, each permanent magnet 21 in the rotor 2 is not segmented in the axial direction, and the first stator module 11, the second stator module 12 and the third stator module 13 are offset from each other by a first predetermined angle in the circumferential direction; or, each permanent magnet 21 in the rotor 2 is divided into three segments in the axial direction, and the three segments of permanent magnet 21 axially correspond to the first stator module 11, the second stator module 12 and the third stator module 13 in the stator, respectively, and the first stator module 11, the second stator module 12 and the third stator module 13 are not offset in the circumferential direction, and the three segments of permanent magnet 21 are offset from each other by a second predetermined angle;

[0074] For a three-phase modular same-pole same-slot permanent magnet motor, the first predetermined angle or the second predetermined angle of the offset is equal to 120° divided by the number of pole pairs of permanent magnets in the modular same-pole same-slot permanent magnet motor.

[0075] See also Figures 1 to 6 In the embodiment of the present invention, a modular permanent magnet motor with 12 poles and 12 slots unit phases composed of three 12-slot stators and a 12-pole rotor is taken as an example for further exemplary description; wherein,

[0076] The three 12-slot stator modules have the same axial length and the same shape of stator core;

[0077] The axial length of the 12-pole rotor is greater than the total axial length of the stator core of three 12-slot stator modules after assembly;

[0078] Each stator module corresponds to a phase winding of the motor and has the same number of turns, and the stator windings of each stator module are independent of each other;

[0079] According to the calculation formula of the slot pitch angle, the mechanical angle of the stator slot of each stator module is 30°, and the electrical angle of the slot pitch of the corresponding slot electromotive force star diagram is 180°; therefore, the slot electromotive force star diagram corresponding to each stator module is the same, and the selected slot of each stator module is used as the starting slot, and the in-and-out arrangement of the windings of the three stator modules is consistent; taking the three-phase as an example, Figure 2 , Figure 3 , Figure 4 As shown, the winding distribution corresponding to the first stator module, the winding distribution corresponding to the second stator module, and the winding distribution corresponding to the third stator module are shown in sequence; Figures 2 to 4 In the figure, A represents the positive direction of A phase current, X represents the reverse direction of A phase current, B represents the positive direction of B phase current, Y represents the reverse direction of B phase current, C represents the positive direction of C phase current, and Z represents the reverse direction of C phase current.

[0080] See also Figure 5 , taking three phases as an example, the permanent magnet 21 in the rotor 2 is not segmented in the axial direction, and the first stator module 11, the second stator module 12, and the third stator module 13 are mutually offset by a certain angle on the circumference, and the offset angle is equal to 120° divided by the number of pole pairs of the permanent magnet 21; therefore, the offset angle is 20° in the specific embodiment of the present invention. Further explanatory, taking the No. 1 slot of the first stator module 11 as the origin, the No. 1 slot of the second stator module 12 is offset at an angle of 20° from the No. 1 slot of the first stator module 11, and the No. 1 slot of the third stator module 13 is offset at an angle of 40° from the No. 1 slot of the first stator module 11 (that is, the No. 1 slot of the third stator module 13 is offset at an angle of 20° from the No. 1 slot of the second stator module 12).

[0081] See also Figure 6 Taking three-phase as an example, the permanent magnet 21 in the rotor 2 is axially divided into three sections. The three sections of the permanent magnet 21 axially correspond to the first stator module 11, the second stator module 12, and the third stator module 13, respectively. The three stator modules are not offset in the circumferential direction, that is, the No. 1 slot of each stator module overlaps on the circumference; the three sections of the permanent magnet 21 are offset from each other in the circumferential direction, with the N pole of the first section of the permanent magnet as the starting point, the second section of the permanent magnet is offset by 20° from the first section of the permanent magnet, and the third section of the permanent magnet is offset by 40° from the first section of the permanent magnet (that is, the third section of the permanent magnet is offset by 20° from the second section of the permanent magnet).

[0082] In combination with the two embodiments of the modular 12P12S permanent magnet motor based on unit phase in the embodiments of the present invention, it can be seen that the positions of the three stator modules relative to the permanent magnets are different, and the circumferential misalignment can reduce the cogging torque of the motor; in addition, since the three stator modules are identical, the difficulty of the motor in the processing and assembly stages is greatly reduced, and the unbalanced magnetic pull on the circumference is also reduced accordingly.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A modular same-pole same-slot permanent magnet motor based on unit phase, It is characterized in that include: A stator (1), the stator (1) comprising a plurality of identical stator modules, the stator modules comprising a stator core (111), stator teeth formed on the stator core (111), and stator windings (112) arranged on the stator teeth; A rotor (2), the rotor (2) comprising a rotor core (22) and a plurality of permanent magnets (21) uniformly distributed on the rotor core in the circumferential direction; in, The rotor (2) is concentrically arranged in the stator (1); the number of the stator modules is the same as the number of phases of the modular same-pole same-slot permanent magnet motor, and the stator windings (112) of each stator module are independent of each other, and the stator windings (112) of each stator module respectively correspond to each phase power supply of the modular same-pole same-slot permanent magnet motor; Each stator module in the stator (1) is offset one by one in a circumferential direction by a first predetermined angle.

2. A modular same-pole same-slot permanent magnet motor based on unit phase according to claim 1, It is characterized in that The number of phases of the modular same-pole same-slot permanent magnet motor based on unit phase is a 1 , the number of pole pairs of the permanent magnet is b 1 , the first predetermined angle c 1 The calculation expression is: c 1 =360°÷(a 1 ×b 1 )。 3. A modular same-pole same-slot permanent magnet motor based on unit phase according to claim 1, It is characterized in that The axial lengths of the permanent magnets (21) and the rotor core (22) in the rotor are both greater than the total axial length of the stator cores (111) of all stator modules in the stator (1) after assembly.

4. A modular same-pole same-slot permanent magnet motor based on unit phase according to claim 1, It is characterized in that The number of stator teeth in the stator module is twice the number of pole pairs of the permanent magnets (21) in the rotor (2).

5. A modular same-pole same-slot permanent magnet motor based on unit phase according to claim 1, It is characterized in that The modular same-pole same-slot permanent magnet motor based on unit phase is a three-phase 12-pole 12-slot modular same-pole same-slot permanent magnet motor; The stator (1) of a three-phase 12-pole 12-slot modular same-pole same-slot permanent magnet motor comprises a first stator module (11), a second stator module (12) and a third stator module (13); wherein the offset angle of the second stator module (12) relative to the first stator module (11) is 20°, and the offset angle of the third stator module (13) relative to the first stator module (11) is 40°.

6. A modular same-pole same-slot permanent magnet motor based on unit phase, It is characterized in that include: A stator (1), the stator (1) comprising a plurality of identical stator modules, the stator modules comprising a stator core (111), stator teeth formed on the stator core (111), and stator windings (112) arranged on the stator teeth; A rotor (2), the rotor (2) comprising a rotor core (22) and a plurality of permanent magnets (21) uniformly distributed on the rotor core in the circumferential direction; in, The rotor (2) is concentrically arranged in the stator (1); the number of the stator modules is the same as the number of phases of the modular same-pole same-slot permanent magnet motor, and the stator windings (112) of each stator module are independent of each other, and the stator windings (112) of each stator module respectively correspond to each phase power supply of the modular same-pole same-slot permanent magnet motor; Each permanent magnet (21) in the rotor (2) is axially segmented, each segment of the permanent magnet (21) axially corresponds to each stator module in the stator, each stator module in the stator (1) is not offset in the circumferential direction, and each segment of the permanent magnet (21) is offset by a second predetermined angle one by one.

7. A modular same-pole same-slot permanent magnet motor based on unit phase according to claim 6, It is characterized in that The number of phases of the modular same-pole same-slot permanent magnet motor based on unit phase is a 2 , the number of pole pairs of the permanent magnet is b 2 , the second predetermined angle c 2 The calculation expression is: c 2 =360°÷(a 2 ×b 2 )。 8. A modular same-pole same-slot permanent magnet motor based on unit phase according to claim 6, It is characterized in that The axial lengths of the permanent magnets (21) and the rotor core (22) in the rotor are both greater than the total axial length of the stator cores (111) of all stator modules in the stator (1) after assembly.

9. A modular same-pole same-slot permanent magnet motor based on unit phase according to claim 6, It is characterized in that The number of stator teeth in the stator module is twice the number of pole pairs of the permanent magnets (21) in the rotor (2).

10. A modular same-pole same-slot permanent magnet motor based on unit phase according to claim 6, It is characterized in that The modular same-pole same-slot permanent magnet motor based on unit phase is a three-phase 12-pole 12-slot modular same-pole same-slot permanent magnet motor; The stator (1) of a three-phase 12-pole 12-slot modular same-pole same-slot permanent magnet motor comprises a first stator module (11), a second stator module (12) and a third stator module (13); the permanent magnets (21) in the rotor (2) of the three-phase 12-pole 12-slot modular same-pole same-slot permanent magnet motor are axially divided into a first section of permanent magnets, a second section of permanent magnets and a third section of permanent magnets, which correspond to the first stator module (11), the second stator module (12) and the third stator module (13), respectively; wherein the first stator module (11), the second stator module (12) and the third stator module (13) are not offset in the circumferential direction, the offset angle of the second section of permanent magnets relative to the first section of permanent magnets is 20°, and the offset angle of the third section of permanent magnets relative to the first section of permanent magnets is 40°.

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