Permanent magnet synchronous motor and wire slot arrangement method and device of permanent magnet synchronous motor

Abstract

The invention discloses a permanent magnet synchronous motor and a wire slot arrangement method and device of the permanent magnet synchronous motor, and relates to the field of permanent magnet synchronous motors. The rotor comprises an outer rotor, an inner rotor and a back plate; the outer rotor and the inner rotor are respectively connected with the back plate, and a gap is reserved between the outer rotor and the inner rotor; wherein the outer rotor, the inner rotor and the stator are concentrically arranged; the stator is located in a gap between the outer rotor and the inner rotor. According to the scheme, the motor adopts the back winding type winding, and the winding coil is wound around the stator yoke part, so that the motor has the advantage of short winding end part. The motor adopts a back-wound winding and a double-rotor structure, two layers of air gaps inside and outside a stator can participate in electric-magnetic energy conversion, torque is output, and the motor has the advantage of high torque density. The end part of the winding is shortened, the copper loss of the winding is reduced, the axial length occupied by the motor iron core is increased, and the efficiency and the torque / volume ratio of the motor are improved.

Description

Technical Field

[0001] The present application relates to the field of permanent magnet synchronous motors, and in particular to a permanent magnet synchronous motor, a method for arranging wire slots for a permanent magnet synchronous motor, a wire slot arrangement device for a permanent magnet synchronous motor, an electronic device, a storage medium, and a motor simulation platform. Background Art

[0002] In automotive permanent magnet in-wheel motor applications, the motor's layout limits typically result in a low aspect ratio (A / D ratio). This means the motor's axial length is typically small compared to its outer diameter. For traditional distributed stacked-winding permanent magnet motors and distributed wave-winding permanent magnet motors, because the winding coils span multiple stator slots, when the motor's A / D ratio is large, the length of the winding ends is relatively small compared to the length of the winding's straight segments. However, when the motor's A / D ratio is small, the length of the winding ends is relatively large compared to the length of the winding's straight segments, and sometimes even greater than the length of the winding's straight segments. In a permanent magnet motor, only the straight segments constitute the "active" portion of the winding. This portion generates the stator's magnetomotive force (MMF) when the winding is energized, which in turn interacts with the rotor's MMF to produce a constant torque output. While the winding ends do not contribute to torque output during motor operation, they do generate copper losses when the winding is energized, resulting in reduced motor efficiency and increased winding heat generation. Therefore, for traditional distributed stacked winding permanent magnet hub motors and traditional distributed wave winding permanent magnet hub motors, there are problems such as long motor winding ends, large copper loss at the winding ends, and reduced motor efficiency.

[0003] In addition, for traditional distributed stacked winding permanent magnet hub motors and traditional distributed wave winding permanent magnet hub motors, since the winding ends are longer and the axial length occupied by the winding ends is larger, the winding ends compress the axial length that can be occupied by the motor laminated core within the limited axial arrangement space, which is not conducive to improving the motor torque / volume ratio, that is, the torque density.

[0004] In order to improve the problems of traditional distributed stacked winding permanent magnet hub motors and traditional distributed wave winding permanent magnet hub motors, such as large copper loss at the winding ends, decreased efficiency and decreased torque density due to the long winding ends, it is necessary to propose a new motor topology for the application of permanent magnet hub motors.

[0005] Therefore, a design scheme for permanent magnet synchronous motor is needed to increase the "effective" part of the winding, reduce the copper loss at the winding end, and improve the torque density. Summary of the Invention

[0006] The purpose of the present invention is to provide a permanent magnet synchronous motor, a method for arranging wire slots for a permanent magnet synchronous motor, a wire slot arrangement device for a permanent magnet synchronous motor, an electronic device, a storage medium and a motor simulation platform, so as to at least solve one of the technical problems of how to reduce the copper loss at the winding end and how to improve the torque density.

[0007] The present invention provides the following solutions:

[0008] According to one aspect of the present invention, there is provided a permanent magnet synchronous motor, comprising: a rotor and a stator;

[0009] The rotor includes an outer rotor, an inner rotor and a back plate;

[0010] The outer rotor and the inner rotor are connected to the back plate respectively, and a gap is left between the outer rotor and the inner rotor;

[0011] Among them, the outer rotor, inner rotor and stator are concentrically arranged;

[0012] The stator is located in the gap between the outer rotor and the inner rotor.

[0013] Furthermore, it also includes: an outer rotor permanent magnet and an inner rotor permanent magnet;

[0014] The outer rotor permanent magnet is arranged on the inner diameter side of the outer rotor;

[0015] The inner rotor permanent magnet is arranged on the outer diameter side of the inner rotor;

[0016] The outer rotor permanent magnets and the inner rotor permanent magnets are arranged in the same number and have opposite polarities.

[0017] Furthermore, it also includes: stator slots;

[0018] The same specification of wire slots are arranged on the inner and outer sides of the stator;

[0019] The cable ducts include cable ducts of a first specification and cable ducts of a second specification.

[0020] Furthermore, it also includes:

[0021] The coil windings fill the first specification wire slots and the second specification wire slots respectively;

[0022] The number of coil windings filling the first specification slots is twice the number of coil windings filling the second specification slots;

[0023] The first specification wire slots and the second specification wire slots are set according to a preset wire slot spacing rule on the stator.

[0024] Furthermore, it also includes:

[0025] The relationship between the number of rotor permanent magnet poles p and the number of slots Q is as follows:

[0026]

[0027] Wherein, n is a positive integer.

[0028] According to two aspects of the present invention, a method for arranging wire slots of a permanent magnet synchronous motor is provided, the method comprising:

[0029] Set sector dividing lines to divide the stator into six sectors with equal angles;

[0030] Arrange the cable duct positions according to the sectors;

[0031] Among them, the calculation formula for obtaining the wire trough spacing rule is

[0032] The angle between the first specification wire trough and the sector dividing line is α1;

[0033] The included angle between the first specification wire trough and the second specification wire trough in the same sector is α2;

[0034] The included angle between the second specification wire troughs in the same sector is α3 or α4;

[0035] The second-specification wire groove forming the wire groove angle α4 is farther away from the sector dividing line than the second-specification wire groove forming the wire groove angle α3.

[0036] Furthermore, it also includes:

[0037] Fill the corresponding wire slots with coil windings;

[0038] Among them, the three-phase windings are divided symmetrically;

[0039] Among them, the winding calculation formula is obtained

[0040] The two coil groups differ in phase by an angle x in the counterclockwise direction.

[0041] According to three aspects of the present invention, a wire slot arrangement device for a permanent magnet synchronous motor is provided, the wire slot arrangement device for the permanent magnet synchronous motor comprising:

[0042] Sector division module, used to set sector division lines and divide the stator into six sectors with equal angles;

[0043] The cable trough layout module is used to arrange the cable trough positions according to the sectors;

[0044] Among them, the calculation formula for obtaining the wire trough spacing rule is

[0045] The angle between the first specification wire trough and the sector dividing line is α1;

[0046] The included angle between the first specification wire trough and the second specification wire trough in the same sector is α2;

[0047] The included angle between the second specification wire troughs in the same sector is α3 or α4;

[0048] The second-specification wire groove forming the wire groove angle α4 is farther away from the sector dividing line than the second-specification wire groove forming the wire groove angle α3.

[0049] According to four aspects of the present invention, there is provided an electronic device, comprising: a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other via the communication bus;

[0050] A computer program is stored in the memory. When the computer program is executed by the processor, the processor is caused to execute the steps of the method for arranging wire slots of a permanent magnet synchronous motor.

[0051] According to five aspects of the present invention, a computer-readable storage medium is provided, comprising: a computer program that can be executed by an electronic device is stored therein, and when the computer program is run on the electronic device, the electronic device executes the steps of the permanent magnet synchronous motor slot arrangement method.

[0052] According to six aspects of the present invention, a motor simulation platform is provided, comprising:

[0053] An electronic device for implementing the steps of the method for arranging the wire slots of the permanent magnet synchronous motor;

[0054] a processor, wherein the processor runs a program and executes the steps of the method for arranging wire slots of a permanent magnet synchronous motor based on data output by the electronic device when the program runs;

[0055] The storage medium is used to store a program, and when the program is running, it executes the steps of the method for arranging the wire slots of the permanent magnet synchronous motor for data output from the electronic device.

[0056] Through the above solution, the following beneficial technical effects are achieved:

[0057] The present application enables the motor to adopt a back-wound winding, in which the winding coil is wound around the stator yoke, so that the motor has the advantage of short winding ends.

[0058] The present application enables the motor to adopt a back-wound winding and a dual-rotor structure, so that both the air gaps inside and outside the stator can participate in the electromagnetic-magnetic energy conversion and output torque, and has the advantage of high torque density.

[0059] This application adopts a back-wound winding solution to shorten the winding end, reduce the winding copper loss, increase the axial length that can be occupied by the motor core, and help improve the motor efficiency and torque / volume ratio.

[0060] In this application, the two permanent magnet rotors of the motor are connected as one by a back plate. The motor is essentially similar to a motor with only one rotor in terms of processing, assembly and control. While improving the performance of the motor, the complexity of assembly and control is not increased.

[0061] This application standardizes the setting rules of windings and stages, and can expand the design of various dual-rotor permanent magnet synchronous motors, reduce design difficulty and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 1 is a structural diagram of a permanent magnet synchronous motor provided by one or more embodiments of the present invention.

[0063] Figure 2 This is a flow chart of a method for arranging wire slots of a permanent magnet synchronous motor provided by one or more embodiments of the present invention.

[0064] Figure 3 It is a structural diagram of a wire slot arrangement device for a permanent magnet synchronous motor provided by one or more embodiments of the present invention.

[0065] Figure 4 Schematic diagram of a high torque density back-wound dual-rotor permanent magnet synchronous motor topology according to a specific embodiment of the present invention.

[0066] Figure 5 It is a schematic diagram of a stator component of a high torque density back-wound winding dual-rotor permanent magnet synchronous motor according to a specific embodiment of the present invention.

[0067] Figure 6 The figure is a schematic diagram of a stator core of a high torque density back-wound winding dual-rotor permanent magnet synchronous motor according to a specific embodiment of the present invention.

[0068] Figure 7 The figure is a schematic diagram of the slot pitch angles between different slot types of the stator core of a high torque density back-wound winding dual-rotor permanent magnet synchronous motor according to a specific embodiment of the present invention.

[0069] Figure 8 The figure is a schematic diagram showing the division of coil groups of each phase winding of a high torque density back-wound dual-rotor permanent magnet synchronous motor according to a specific embodiment of the present invention.

[0070] Figure 9 The figure is a schematic diagram of a high torque density back-wound winding dual-rotor permanent magnet synchronous motor rotor according to a specific embodiment of the present invention.

[0071] Figure 10 Schematic diagram of the three-phase current waveform of a motor according to a specific embodiment of the present invention.

[0072] Figure 11It is a schematic diagram of the no-load back electromotive force of a motor according to a specific embodiment of the present invention.

[0073] Figure 12 Schematic diagram of a motor output torque waveform according to a specific embodiment of the present invention.

[0074] Figure 13 It is a schematic diagram of the magnetomotive force waveform of a motor according to a specific embodiment of the present invention.

[0075] Figure 14 FIG. 1 is a schematic diagram of the FFT of the magnetomotive force of a motor according to a specific embodiment of the present invention.

[0076] Figure 15 It is a schematic diagram of a magnetic density cloud diagram of a motor according to a specific embodiment of the present invention.

[0077] Figure 16 The present invention is a block diagram of an electronic device structure of a method for arranging wire slots for a permanent magnet synchronous motor provided by one or more embodiments of the present invention.

[0078] Reference numerals:

[0079] 1. Stator; 2. Outer rotor; 3. Inner rotor; 4. Back plate;

[0080] 5. Winding; 6. Outer rotor core; 7. Inner rotor core; 8. Outer rotor permanent magnet; 9. Inner rotor permanent magnet;

[0081] 10. Coil; 11. Coil wound around the stator yoke; 12. Large slot; 13. Small slot; 14. First specification slot; 15. Second specification slot; 16. First sector unit; 17. Second sector unit; 18. Third sector unit; 19. Fourth sector unit; 20. Fifth sector unit; 21. Sixth sector unit; 22. First unit dividing line; 23. Second unit dividing line; 24. Third unit dividing line; 25. Fourth unit dividing line; 26. Fifth unit dividing line; 27. Sixth unit dividing line;

[0082] 28. Coil 1 of coil group A; 29. Coil 2 of coil group A; 30. Coil 3 of coil group A; 31. Coil 4 of coil group A; 32. Coil 5 of coil group A; 33. Coil 6 of coil group A; 34. Coil 7 of coil group A; 35. Coil 8 of coil group A;

[0083] 36. Coil 1 of coil group B; 37. Coil 2 of coil group B; 38. Coil 3 of coil group B; 39. Coil 4 of coil group B; 40. Coil 5 of coil group B; 41. Coil 6 of coil group B; 42. Coil 7 of coil group B; 43. Coil 8 of coil group B. DETAILED DESCRIPTION

[0084] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0085] Figure 1 1 is a structural diagram of a permanent magnet synchronous motor provided by one or more embodiments of the present invention.

[0086] like Figure 1 The permanent magnet synchronous motor shown comprises: a rotor and a stator 1;

[0087] The rotor includes an outer rotor 2, an inner rotor 3 and a back plate 4;

[0088] The outer rotor 2 and the inner rotor 3 are respectively connected to the back plate 4, and a gap is left between the outer rotor 2 and the inner rotor 3;

[0089] Among them, the outer rotor 2, the inner rotor 3 and the stator 1 are arranged concentrically;

[0090] The stator 1 is located in the gap between the outer rotor 2 and the inner rotor 3 .

[0091] In this embodiment, it further comprises: an outer rotor permanent magnet 8 and an inner rotor permanent magnet 9;

[0092] The outer rotor permanent magnet 8 is arranged on the inner diameter side of the outer rotor;

[0093] The inner rotor permanent magnet 9 is arranged on the outer diameter side of the inner rotor;

[0094] The outer rotor permanent magnets 8 and the inner rotor permanent magnets 9 are arranged in the same number and have opposite polarities.

[0095] In this embodiment, it further includes: stator slots;

[0096] The inner side of stator 1 and the outer side of stator 1 are correspondingly arranged with wire slots of the same specifications;

[0097] The wire ducts include a first specification wire duct 14 and a second specification wire duct 15 .

[0098] Specifically, the outer rotor 2, inner rotor 3, and stator 1 are all barrel-shaped and concentrically arranged. A backplate 4 secures the position of the outer and inner rotors, allowing them to rotate at the same angle. The stator 1 is located within the gap between the outer and inner rotors, and the current flowing through the windings drives the rotor's rotation.

[0099] In this embodiment, the outer rotor permanent magnets 8 and inner rotor permanent magnets 9 are arranged in pairs with north and south poles in the same predetermined sector. For example, if the outer rotor permanent magnets 8 are north poles, the inner rotor permanent magnets 9 are south poles. For example, if the rotor permanent magnets have 14 poles, the outer rotor permanent magnets 8 are arranged from the first permanent magnet with north poles to the 14th permanent magnet with south poles. Correspondingly, the inner rotor permanent magnets 9 are arranged from the first permanent magnet with south poles to the 14th permanent magnet with north poles.

[0100] In this embodiment, it also includes:

[0101] The coil windings are filled with the first specification wire slot 14 and the second specification wire slot 15 respectively;

[0102] Among them, the number of coil windings filled with 14 coils in the first specification slot is twice the number of windings filled with 15 coils in the second specification slot;

[0103] The first specification wire slots 14 and the second specification wire slots 15 are regularly arranged at preset wire slot spacings on the stator 1 .

[0104] In this embodiment, it also includes:

[0105] The relationship between the number of rotor permanent magnet poles p and the number of slots Q is as follows:

[0106] Wherein, n is a positive integer.

[0107] Specifically, the number of rotor permanent magnet poles p and the number of line slots Q are in a fixed proportional relationship, and the step precision of motor control can be increased by expanding the number of poles.

[0108] Figure 2 This is a flow chart of a method for arranging wire slots of a permanent magnet synchronous motor provided by one or more embodiments of the present invention.

[0109] like Figure 2 The slot arrangement method of the permanent magnet synchronous motor shown includes:

[0110] Step S1, setting sector dividing lines to divide the stator into six sectors with equal angles;

[0111] Step S2, arranging the cable trough positions corresponding to the sectors;

[0112] Among them, the calculation formula for obtaining the wire trough spacing rule is

[0113] The angle between the first specification wire slot 14 and the sector dividing line is α1;

[0114] The included angle between the first specification wire duct 14 and the second specification wire duct 15 in the same sector is α2;

[0115] The included angle between the second specification wire duct 15 and the second specification wire duct 15 in the same sector is α3 or α4;

[0116] The second-specification wire groove 15 forming the wire groove angle α4 is farther away from the sector dividing line (eg, the first unit dividing line 22 and the second unit dividing line 23 ) than the second-specification wire groove 15 forming the wire groove angle α3 .

[0117] In this embodiment, it also includes:

[0118] Fill the corresponding wire slots with coil windings;

[0119] Among them, the three-phase windings are divided symmetrically;

[0120] Among them, the winding calculation formula is obtained

[0121] The two coil groups differ in phase by an angle x in the counterclockwise direction.

[0122] Specifically, taking a rotor with 14 permanent magnet poles and 72 slots as an example, the six sectors are divided, each of which includes six stator slots on the inner side (two first-specification slots located at the edges and four second-specification slots located in the middle) and six stator slots on the outer side (two first-specification slots located at the edges and four second-specification slots located in the middle). The six stator slots on the inner side and the six stator slots on the outer side correspond to the same radial ray, and the radial ray and the sector dividing line form angles α1, α2, α3, and α4.

[0123] Figure 3 It is a structural diagram of a wire slot arrangement device for a permanent magnet synchronous motor provided by one or more embodiments of the present invention.

[0124] like Figure 3 The wire slot arrangement device of the permanent magnet synchronous motor shown includes: a sector division module, a wire slot arrangement module;

[0125] Sector division module, used to set sector division lines and divide the stator into six sectors with equal angles;

[0126] The cable trough layout module is used to arrange the cable trough positions according to the sectors;

[0127] Among them, the calculation formula for obtaining the wire trough spacing rule is

[0128] The angle between the first specification wire slot 14 and the sector dividing line is α1;

[0129] The included angle between the first specification wire duct 14 and the second specification wire duct 15 in the same sector is α2;

[0130] The included angle between the second specification wire duct 15 and the second specification wire duct 15 in the same sector is α3 or α4;

[0131] The second-specification wire groove 14 forming the wire groove angle α4 is farther away from the sector dividing line than the second-specification wire groove 15 forming the wire groove angle α3.

[0132] It is worth noting that although the present system only discloses the sector segmentation module and the cable tray layout module, it does not mean that the present device is limited to the above-mentioned basic functional modules. Rather, what the present invention wants to express is that, based on the above-mentioned basic functional modules, those skilled in the art can arbitrarily add one or more functional modules in combination with the existing technology to form an infinite number of embodiments or technical solutions. In other words, the present system is open rather than closed. Just because the present embodiment only discloses individual basic functional modules, it cannot be considered that the scope of protection of the claims of the present invention is limited to the above-mentioned basic functional modules.

[0133] Figure 4 Schematic diagram of a high torque density back-wound dual-rotor permanent magnet synchronous motor topology according to a specific embodiment of the present invention.

[0134] Figure 5 It is a schematic diagram of a stator component of a high torque density back-wound winding dual-rotor permanent magnet synchronous motor according to a specific embodiment of the present invention.

[0135] Figure 6 The figure is a schematic diagram of a stator core of a high torque density back-wound winding dual-rotor permanent magnet synchronous motor according to a specific embodiment of the present invention.

[0136] Figure 7 The figure is a schematic diagram of the slot pitch angles between different slot types of the stator core of a high torque density back-wound winding dual-rotor permanent magnet synchronous motor according to a specific embodiment of the present invention.

[0137] Figure 8 The figure is a schematic diagram showing the division of coil groups of each phase winding of a high torque density back-wound dual-rotor permanent magnet synchronous motor according to a specific embodiment of the present invention.

[0138] Figure 9 The figure is a schematic diagram of a high torque density back-wound winding dual-rotor permanent magnet synchronous motor rotor according to a specific embodiment of the present invention.

[0139] Figure 10 Schematic diagram of the three-phase current waveform of a motor according to a specific embodiment of the present invention.

[0140] Figure 11 It is a schematic diagram of the no-load back electromotive force of a motor according to a specific embodiment of the present invention.

[0141] Figure 12 Schematic diagram of a motor output torque waveform according to a specific embodiment of the present invention.

[0142] Figure 13It is a schematic diagram of the magnetomotive force waveform of a motor according to a specific embodiment of the present invention.

[0143] Figure 14 FIG. 1 is a schematic diagram of the FFT of the magnetomotive force of a motor according to a specific embodiment of the present invention.

[0144] Figure 15 It is a schematic diagram of a magnetic density cloud diagram of a motor according to a specific embodiment of the present invention.

[0145] In a specific embodiment, Figure 4 The high torque density back-wound dual-rotor permanent magnet synchronous motor topology shown includes a winding 5 , an outer rotor core 6 , an inner rotor core 7 , an outer rotor permanent magnet 8 , and an inner rotor permanent magnet 9 .

[0146] The motor uses a back-wound winding 5, with the winding coils wound around the stator yoke 11. Furthermore, the motor employs a dual-rotor structure consisting of an inner rotor core 7 with surface-mounted permanent magnets and an outer rotor permanent magnet 8. A permanent magnet rotor is positioned on the stator's outer diameter side and another on the stator's inner diameter side, each with the same number of poles. The outer rotor permanent magnets 8 and the inner rotor permanent magnets 9 are connected together by a backplate 4, rotating synchronously during motor operation.

[0147] The number of poles p and the number of slots Q of the high torque density back-wound dual-rotor permanent magnet synchronous motor satisfy the following relationship:

[0148] Where n is a positive integer.

[0149] In this embodiment, if Figure 5 The stator component of the high torque density back-wound winding dual-rotor permanent magnet synchronous motor shown includes a coil 10 , a coil wound around a stator yoke 11 , large slots 12 , and small slots 13 .

[0150] Slots of the same specifications are arranged on the inner and outer sides of the stator (on the same radial line). These slots include large slots 12 (equivalent to first-specification slots 14) and small slots 13 (equivalent to second-specification slots 15). The ratio of large slots 12 to small slots 13 is 1:2; the number of coils in a large slot 12 is twice the number of coils in a small slot 13.

[0151] In this embodiment, further, Figure 6The stator core of the high torque density back-wound winding dual-rotor permanent magnet synchronous motor shown in the figure includes 72 slots, which are distributed on the inner diameter side and the outer diameter side of the stator. The stator core contains two slot types (first specification line slots 14, second specification line slots 15), which are called "large slots 12" and "small slots 13" respectively. Moreover, the stator core (stator 1) can be divided into 6 identical units, each unit containing 4 large slots 12 and 8 small slots 13 distributed on the inner and outer sides of the stator. Compare Figure 5 and Figure 6 It can be seen that in the stator core of the high torque density back-wound dual-rotor permanent magnet synchronous motor, each large slot 12 accommodates two coil sides, and each small slot 13 accommodates one coil side.

[0152] In this embodiment, if Figure 7 The slot pitch angles between different slot types of the stator core of the high torque density back-wound winding dual-rotor permanent magnet synchronous motor shown in the figure are such that the slot center lines on the stator outer diameter side and the stator inner diameter side are collinear (with the same radius ray). Figure 7 In the figure, the stator core is divided into six units, which is equivalent to dividing the stator into six sectors with equal angles, including a first sector unit 16, a second sector unit 17, a third sector unit 18, a fourth sector unit 19, a fifth sector unit 20, and a sixth sector unit 21.

[0153] The structure further includes a first unit dividing line 22 , a second unit dividing line 23 , a third unit dividing line 24 , a fourth unit dividing line 25 , a fifth unit dividing line 26 , and a sixth unit dividing line 27 .

[0154] In the stator core unit 1 (first sector unit 16), the slot pitch angle between different stator slots is:

[0155] (1) The angle between the groove 1w and the first unit dividing line 22 is α1; the angle between the groove 1n and the first unit dividing line 22 is α1; the angle between the groove 6w and the sixth unit dividing line 27 is α1; the angle between the groove 6n and the sixth unit dividing line 27 is α1;

[0156] (2) The angle between groove 5w and groove 6w is α2; the angle between groove 5n and groove 6n is α2; the angle between groove 1w and groove 2w is α2; the angle between groove 1n and groove 2n is α2;

[0157] (3) The angle between groove 2w and groove 3w is α3; the angle between groove 2n and groove 3n is α3; the angle between groove 4w and groove 5w is α3; and the angle between groove 4n and groove 5n is α3.

[0158] (4) The angle between groove 3w and groove 4w is α4; the angle between groove 3n and groove 4n is α4.

[0159] Similarly, since the stator core of the high torque density back-wound dual-rotor permanent magnet synchronous motor can be divided into 6 completely identical units, in other units of the stator core, the slot pitch angle between different stator slots can be defined similarly with reference to unit 1 (first sector unit 16).

[0160] The slot angles between different slot types satisfy the relationship shown in the following formula:

[0161]

[0162] Further, such as Figure 6 As shown in FIG, the high torque density back-wound dual-rotor permanent magnet synchronous motor includes 48 coils, which are divided into symmetrical three-phase windings. Each phase winding contains 16 coils, and the 16 coils of each phase can be divided into two coil groups, namely coil group A and coil group B, and each coil group contains 8 coils.

[0163] In this embodiment, if Figure 8 The coil group of each phase winding of the high torque density back-wound dual-rotor permanent magnet synchronous motor shown is divided into coils 28 of coil group A, coil 2 of coil group A 29, coil 3 of coil group A 30, coil 4 of coil group A 31, coil 5 of coil group A 32, coil 6 of coil group A 33, coil 7 of coil group A 34, and coil 8 of coil group A 35;

[0164] Coil 1 36 of coil group B, coil 2 37 of coil group B, coil 3 38 of coil group B, coil 4 39 of coil group B, coil 5 40 of coil group B, coil 6 41 of coil group B, coil 7 42 of coil group B, and coil 8 43 of coil group B.

[0165] Taking the A-phase winding as an example, the coil group division method is given. The angle x between the two coil groups in the counterclockwise direction must satisfy the formula:

[0166] In this embodiment, if Figure 9The high-torque-density back-wound dual-rotor permanent magnet synchronous motor uses a surface-mounted permanent magnet dual-rotor structure. A permanent magnet rotor is located on the outer and inner diameter sides of the stator. Both rotors have the same number of poles, 14. The two permanent magnet rotors are connected together by a backplate and rotate synchronously during motor operation. It is important to note that, first, the two permanent magnet rotors of the high-torque-density back-wound dual-rotor permanent magnet synchronous motor can use other permanent magnet arrangements, such as internal permanent magnet rotors and Halbach permanent magnet rotors, in addition to surface-mounted permanent magnet rotors. Second, the permanent magnet arrangements of the two permanent magnet rotors can be the same, for example, both the inner and outer rotors use surface-mounted permanent magnet rotors. However, the permanent magnet arrangements of the two permanent magnet rotors can also be different, for example, the inner rotor uses a surface-mounted permanent magnet rotor and the outer rotor uses an internal permanent magnet rotor. When the permanent magnet arrangement structures adopted by the two permanent magnet rotors are different, a variety of inner and outer permanent magnet rotor structure combinations are generated.

[0167] In another specific embodiment, based on a high torque density back-wound winding dual-rotor permanent magnet synchronous motor, the motor parameters are as shown in Table 1.

[0168] Table 1 Motor parameters

[0169]

[0170]

[0171] In this embodiment, if Figure 10 The three-phase current waveform of the motor shown is passed into the motor winding to obtain the following Figure 11 The no-load back EMF of the motor is shown in Figure 2. Figure 12 The motor output torque shown is output from the motor rotor. In this embodiment, the average torque output by the outer rotor alone is measured to be 88.53 Nm, the average torque output by the inner rotor alone is 70.41 Nm, and the total output torque of the motor is the sum of the average torques output by the inner and outer rotors, 158.94 Nm; correspondingly, Figure 15 The motor magnetic density cloud shown is Figure 13 The motor magnetomotive force waveform, such as Figure 14 FFT of the motor magnetomotive force.

[0172] Figure 16 The present invention provides a structural block diagram of an electronic device for a method for arranging wire slots in a permanent magnet synchronous motor according to one or more embodiments of the present invention.

[0173] like Figure 16As shown, the present application provides an electronic device, comprising: a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other via the communication bus;

[0174] A computer program is stored in the memory. When the computer program is executed by the processor, the processor executes the steps of the method for arranging wire slots of a permanent magnet synchronous motor.

[0175] The present application also provides a computer-readable storage medium storing steps of a method for arranging wire slots of a permanent magnet synchronous motor that can be executed by an electronic device.

[0176] This application also provides a motor simulation platform, including:

[0177] Electronic equipment, used to implement the method and steps for arranging the wire slots of a combustion permanent magnet synchronous motor;

[0178] A processor, wherein the processor runs a program and executes the steps of the method for arranging wire slots of a permanent magnet synchronous motor based on data output by the electronic device when the program runs;

[0179] The storage medium is used to store a program, and when the program is running, it executes the steps of the method for arranging the wire slots of the permanent magnet synchronous motor for the data output from the electronic device.

[0180] The communication bus mentioned in the electronic device mentioned above may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. This communication bus can be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is used in the figure, but this does not mean that there is only one bus or only one type of bus.

[0181] The electronic device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory. The operating system can be any one or more computer operating systems that control electronic devices through processes, such as the Linux operating system, the Unix operating system, the Android operating system, the iOS operating system, or the Windows operating system. In the embodiments of the present invention, the electronic device can be a handheld device such as a smartphone or a tablet computer, or an electronic device such as a desktop computer or a portable computer, which is not particularly limited in the embodiments of the present invention.

[0182] The execution subject of the electronic device control in the embodiment of the present invention can be an electronic device, or a functional module in the electronic device that can call a program and execute the program. The electronic device can obtain the firmware corresponding to the storage medium. The firmware corresponding to the storage medium is provided by the supplier. The firmware corresponding to different storage media can be the same or different, and is not limited here. After the electronic device obtains the firmware corresponding to the storage medium, it can write the firmware corresponding to the storage medium into the storage medium, specifically, burn the firmware corresponding to the storage medium into the storage medium. The process of burning the firmware into the storage medium can be implemented using existing technology and will not be described in detail in the embodiment of the present invention.

[0183] The electronic device can also obtain a reset command corresponding to the storage medium. The reset command corresponding to the storage medium is provided by the supplier. The reset commands corresponding to different storage media can be the same or different, and are not limited here.

[0184] In this case, the storage medium of the electronic device is a storage medium in which the corresponding firmware is written. The electronic device can respond to the reset command corresponding to the storage medium in which the corresponding firmware is written, thereby resetting the storage medium in which the corresponding firmware is written according to the reset command corresponding to the storage medium. The process of resetting the storage medium according to the reset command can be implemented in the existing technology and will not be described in detail in the embodiments of the present invention.

[0185] For the convenience of description, the above devices are described as various units and modules according to their functions. Of course, when implementing this application, the functions of each unit and module can be implemented in the same or multiple software and / or hardware.

[0186] Those skilled in the art will understand that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art in the art to which the present invention pertains. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with those in the context of the prior art and, unless specifically defined, will not be interpreted in an idealized or overly formal sense.

[0187] For simplicity of description, the method embodiments are described as a series of actions. However, those skilled in the art should be aware that the embodiments of the present invention are not limited by the order of the actions described, because certain steps can be performed in other orders or simultaneously according to the embodiments of the present invention. Secondly, those skilled in the art should also be aware that the embodiments described in this specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present invention.

[0188] Through the description of the above embodiments, it can be seen that those skilled in the art can clearly understand that the present application can be implemented by means of software plus a necessary general-purpose hardware platform. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product can be stored in a storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in various embodiments of the present application or certain parts of the embodiments.

[0189] 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, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A permanent magnet synchronous motor, characterized in that: The permanent magnet synchronous motor comprises: a rotor and a stator; The rotor includes an outer rotor, an inner rotor and a back plate; The outer rotor and the inner rotor are connected to the back plate respectively, and a gap is left between the outer rotor and the inner rotor; Among them, the outer rotor, inner rotor and stator are concentrically arranged; The stator is located in the gap between the outer rotor and the inner rotor.

2. The permanent magnet synchronous motor according to claim 1, characterized in that: Also includes: outer rotor permanent magnets and inner rotor permanent magnets; The outer rotor permanent magnet is arranged on the inner diameter side of the outer rotor; The inner rotor permanent magnet is arranged on the outer diameter side of the inner rotor; The outer rotor permanent magnets and the inner rotor permanent magnets are arranged in the same number and have opposite polarities.

3. The permanent magnet synchronous motor according to claim 1, characterized in that: Also includes: stator slots; The same specification of wire slots are arranged on the inner and outer sides of the stator; The cable ducts include cable ducts of a first specification and cable ducts of a second specification.

4. The permanent magnet synchronous motor according to claim 3, characterized in that: Also includes: The coil windings fill the first specification wire slots and the second specification wire slots respectively; The number of coil windings filling the first specification slots is twice the number of coil windings filling the second specification slots; The first specification wire slots and the second specification wire slots are set according to a preset wire slot spacing rule on the stator.

5. The permanent magnet synchronous motor according to any one of claims 2 to 4, characterized in that: Also includes: The relationship between the number of rotor permanent magnet poles p and the number of slots Q is as follows: Wherein, n is a positive integer.

6. A method for arranging wire slots of a permanent magnet synchronous motor, characterized in that: The method for arranging the slots of the permanent magnet synchronous motor includes: Set sector dividing lines to divide the stator into six sectors with equal angles; Arrange the cable duct positions according to the sectors; Among them, the calculation formula for obtaining the wire trough spacing rule is The angle between the first specification wire trough and the sector dividing line is α1; The included angle between the first specification wire trough and the second specification wire trough in the same sector is α2; The included angle between the second specification wire troughs in the same sector is α3 or α4; The second-specification wire groove forming the wire groove angle α4 is farther away from the sector dividing line than the second-specification wire groove forming the wire groove angle α3.

7. The method for arranging wire slots of a permanent magnet synchronous motor according to claim 6, characterized in that: Also includes: Fill the corresponding wire slots with coil windings; Among them, the three-phase windings are divided symmetrically; Among them, the winding calculation formula is obtained The two coil groups differ in phase by an angle x in the counterclockwise direction.

8. A wire slot arrangement device for a permanent magnet synchronous motor, characterized in that: The wire slot arrangement device of the permanent magnet synchronous motor comprises: Sector division module, used to set sector division lines and divide the stator into six sectors with equal angles; The cable trough layout module is used to arrange the cable trough positions according to the sectors; Among them, the calculation formula for obtaining the wire trough spacing rule is The angle between the first specification wire trough and the sector dividing line is α1; The included angle between the first specification wire trough and the second specification wire trough in the same sector is α2; The included angle between the second specification wire troughs in the same sector is α3 or α4; The second-specification wire groove forming the wire groove angle α4 is farther away from the sector dividing line than the second-specification wire groove forming the wire groove angle α3.

9. An electronic device, characterized in that: include: A processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other via the communication bus; A computer program is stored in the memory. When the computer program is executed by the processor, the processor executes the steps of the method for arranging wire slots of a permanent magnet synchronous motor according to any one of claims 6 or 7.

10. A computer-readable storage medium, characterized in that include: It stores a computer program that can be executed by an electronic device. When the computer program runs on the electronic device, the electronic device executes the steps of the wire slot arrangement method of the permanent magnet synchronous motor as described in any one of claims 6 or 7.

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