Double-stator motor and carrier

Abstract

The utility model relates to the field of motors, and discloses a double-stator motor and a carrier. The double-stator motor comprises a rotor assembly which is of an annular structure; the first stator comprises a first magnetic conductive piece and a first winding, the first magnetic conductive piece is annularly sleeved on the outer side of the rotor assembly, and the first winding is arranged on one side, close to the rotor assembly, of the first magnetic conductive piece; the second stator comprises a second magnetic conductive piece and a second winding, the second magnetic conductive piece is annularly sleeved on the inner side of the rotor assembly, and the second winding is arranged on one side, close to the rotor assembly, of the second magnetic conductive piece; wherein at least one of the first magnetic conductive piece and the second magnetic conductive piece comprises a stator yoke and stator teeth, the stator yoke and the rotor assembly are arranged in a ring sleeving mode, and the stator teeth are assembled on the side, close to the rotor assembly, of the stator yoke and used for winding the first winding or the second winding. The split type design enables the stator teeth to be independently manufactured and wound, the winding process can be completed before the stator teeth are assembled, the winding operation is more flexible, and the problem of inconvenient operation caused by limited space is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, concretely relates to double stator motor and carrier. BACKGROUND

[0002] With the development of motor technology, double stator motor due to its unique structure design, in the promotion motor efficiency and power density has shown tremendous potential.

[0003] Double stator motor generally includes rotor, the inner stator of setting in the inner side of rotor and the outer stator of setting in the outer side of rotor. Inner, outer stator are equipped with stator tooth, the main role of these stator tooth is to provide setting space for winding, through the power supply of winding produces magnetic field, and then drive rotor to run. This double stator structure can effectively increase the electromagnetic interaction area of motor, improve motor performance.

[0004] However, due to the existence of rotor between inner and outer stator, and the space between stator teeth is limited, leading to the operation space when winding is small, when winding, operation is relatively inconvenient, thereby leading to the difficulty of winding increases, and winding precision is difficult to guarantee. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model provides a kind of double stator motor and carrier to solve or improve the double stator motor in relevant technology, winding operation space when winding is small, when winding, operation is relatively inconvenient Problem.

[0006] First, the utility model provides a kind of double stator motor, comprising:

[0007] Rotor assembly, is set as annular structure;

[0008] First stator, including first magnetic conducting piece and first winding, the first magnetic conducting piece ring sleeve is set on the outer side of the rotor assembly, and the first winding is set on the first magnetic conducting piece;

[0009] Second stator, including second magnetic conducting piece and second winding, the second magnetic conducting piece ring sleeve is set on the inner side of the rotor assembly, and the second winding is set on the second magnetic conducting piece;

[0010] Wherein, at least one of the first magnetic conducting piece and the second magnetic conducting piece includes stator yoke and several stator teeth, the stator yoke is set with the rotor assembly ring, and several stator teeth are assembled on the side of the stator yoke close to the rotor assembly and are used for winding the first winding or the second winding.

[0011] In an alternative embodiment, one of the stator yoke and the stator tooth is provided with an assembly groove, and the other is provided with an assembly protrusion, the depth direction of the assembly groove is set along the radial direction of the stator yoke, and the assembly protrusion is arranged in the assembly groove.

[0012] In an optional embodiment, the first winding and the second winding have the same winding direction.

[0013] And / or, the first winding and the second winding can be independently controlled respectively.

[0014] In an optional embodiment, the first magnetic conductor and the second magnetic conductor each include the stator yoke and the stator tooth.

[0015] Wherein, the stator tooth of the first magnetic conductor corresponds to the stator tooth of the second magnetic conductor one by one, and along the radial direction of the rotor assembly, the stator tooth of the first magnetic conductor is oppositely arranged with the corresponding stator tooth of the second magnetic conductor.

[0016] In an optional embodiment, the rotor assembly includes:

[0017] The bracket is provided in a ring structure.

[0018] The magnet group is arranged in a Halbach array, and the magnetic field strength near the first stator side is greater than or less than the magnetic field strength near the second stator side, or the magnet group is arranged in a spoke array.

[0019] In an optional embodiment, the bracket is provided with a containing space, the bracket is provided with a first opening on the side facing the first stator, the bracket is provided with a second opening on the side facing the second stator, and the first opening and the second opening are in communication with the containing space, and the magnet group is arranged in the containing space.

[0020] In an optional embodiment, the number of containing spaces is multiple, and the magnet group includes multiple magnet blocks.

[0021] Wherein, multiple containing spaces are distributed along the circumferential direction of the rotor assembly, and each containing space is provided with a corresponding magnet block.

[0022] In an optional embodiment, the bracket includes a connecting ring and a partition piece.

[0023] Wherein, multiple partition pieces are connected to one end of the connecting ring in the axial direction, and multiple partition pieces are spaced apart along the circumferential direction of the rotor assembly, and the space between adjacent two partition pieces forms the containing space.

[0024] In an optional embodiment, the bracket is provided with a clamping protrusion, and the clamping protrusion limits the magnet group in the radial direction of the rotor assembly.

[0025] In a second aspect, the utility model also provides a carrier, including the double stator motor as described above.

[0026] The double stator motor provided by the utility model, at least one of the first magnetic conducting member and the second magnetic conducting member includes a stator yoke and a stator tooth, the stator tooth is assembled on one side of the stator yoke close to the rotor assembly, the split design makes that the stator tooth can be manufactured and wired separately, the wiring process can be completed before the stator tooth is assembled, the problem of mutual interference between the inner stator and the outer stator and between the stator tooth and the stator tooth does not appear in the wiring process, the wiring operation is more flexible, the inconvenient operation problem caused by the limited space is solved, and the automation production is facilitated, so as to improve the production efficiency.

[0027] In addition, the first stator and the second stator can work simultaneously, increase the acting area of magnetic field, and improve the power density and electromagnetic torque of the motor.

[0028] The carrier provided by the utility model contains the double stator motor provided by the utility model, so contains all advantages of the double stator motor. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the drawings needed in the specific embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0030] Figure 1 It is a schematic diagram of the principle of the double stator motor provided in the embodiment of the utility model;

[0031] Figure 2 It is a partial schematic diagram of the double stator motor provided in the embodiment of the utility model;

[0032] Figure 3 It is Figure 2 The magnetic circuit diagram in the view shown in the figure;

[0033] Figure 4 It is the magnetic circuit diagram formed by the first stator and the rotor assembly provided in the embodiment of the utility model;

[0034] Figure 5 It is the magnetic circuit diagram formed by the second stator and the rotor assembly provided in the embodiment of the utility model;

[0035] Figure 6 It is the structural schematic diagram of the stator tooth provided in the embodiment of the utility model;

[0036] Figure 7 A structure diagram of a stator yoke provided in an embodiment of the utility model;

[0037] Figure 8 A structure diagram of another stator yoke provided in an embodiment of the utility model;

[0038] Figure 9 A structure diagram of a rotor assembly provided in an embodiment of the utility model;

[0039] Figure 10 A Figure 9 A local enlarged view of A in the middle;

[0040] Figure 11 A local diagram of a rotor assembly provided in an embodiment of the utility model;

[0041] Figure 12 A diagram of a magnet group adopting a Halbach array provided in an embodiment of the utility model.

[0042] Explanation of reference signs:

[0043] 1, rotor assembly; 101, magnet group; 1011, magnet block; 102, support; 1021, containing space; 1022, first opening; 1023, second opening; 1024, mounting port; 1025, clamping protrusion; 1026, partition piece; 1027, connecting ring; 2, first stator; 201, first magnetic conducting piece; 202, first winding; 3, second stator; 301, second magnetic conducting piece; 302, second winding; 4, stator yoke; 5, stator tooth; 6, assembling groove; 7, assembling protrusion. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0045] In the related art, a double-stator motor generally comprises a rotor, an inner stator arranged on the inner side of the rotor and an outer stator located on the outer side of the rotor. The inner and outer stators are both provided with stator teeth, and the main function of these stator teeth is to provide a setting space for windings, and a magnetic field is generated by the energization of the windings, thereby driving the rotor to rotate. This double-stator structure can effectively increase the electromagnetic interaction area of the motor and improve the performance of the motor.

[0046] However, due to the existence of the rotor between the inner and outer stators and the limited space between the stator teeth, for example, the inner and outer stators and the stator teeth interfere with each other, resulting in a narrow operation space when winding the winding, and the operation is more inconvenient when winding the winding, thereby increasing the winding difficulty and the winding precision is difficult to guarantee.

[0047] In order to solve or improve the problem of the double-stator motor in the related art that the operation space is narrow when winding the winding, and the operation is more inconvenient when winding the winding, the utility model embodiment provides a double-stator motor and a carrier.

[0048] The embodiments of the utility model are described below Figures 1 to 12 The double-stator motor provided in the embodiments of the utility model is described below.

[0049] Specifically, the double-stator motor comprises a rotor assembly 1, a first stator 2 and a second stator 3.

[0050] The rotor assembly 1 is arranged in a ring structure. It can be understood that the rotor assembly 1 is rotatably arranged. The rotatable arrangement form of the rotor assembly 1 is not the focus of the improvement of the present application, and therefore will not be described again.

[0051] The first stator 2 comprises a first magnetic conducting member 201 and a first winding 202. The first magnetic conducting member 201 is sleeved on the outer side of the rotor assembly 1. It can be understood that the first magnetic conducting member 201 is arranged in a ring structure, and the first magnetic conducting member 201 can be arranged as a core. The first winding 202 is arranged on the first magnetic conducting member 201, for example, arranged on the side of the first magnetic conducting member 201 close to the rotor assembly 1, or in other words, arranged on the inner side of the first magnetic conducting member 201.

[0052] The second stator 3 comprises a second magnetic conducting member 301 and a second winding 302. The second magnetic conducting member 301 is sleeved on the outer side of the rotor assembly 1. It can be understood that the second magnetic conducting member 301 is arranged in a ring structure, and the second magnetic conducting member 301 can be arranged as a core. The second winding 302 is arranged on the second magnetic conducting member 301, for example, arranged on the side of the second magnetic conducting member 301 close to the rotor assembly 1, or in other words, arranged on the outer side of the second magnetic conducting member 301.

[0053] At least one of the first magnetic conducting member 201 and the second magnetic conducting member 301 comprises a stator yoke 4 and a plurality of stator teeth 5. The stator yoke 4 is sleeved with the rotor assembly 1, and the plurality of stator teeth 5 are assembled on the side of the stator yoke 4 close to the rotor assembly 1 and used for winding the first winding 202 or the second winding 302.

[0054] For example, the first magnetic conductor 201 comprises the stator yoke 4 and the stator teeth 5, and the stator teeth 5 are assembled to the inner side of the stator yoke 4, and the stator teeth 5 are used for winding the first winding 202. The stator yoke 4 and the stator teeth 5 of the second magnetic conductor 301 can be provided as an integrated structure, such as a stamping integrated structure or a welded integrated structure.

[0055] Alternatively, the second magnetic conductor 301 comprises the stator yoke 4 and the stator teeth 5, and the stator teeth 5 are assembled to the outer side of the stator yoke 4, and the stator teeth 5 are used for winding the second winding 302. The stator yoke 4 and the stator teeth 5 of the first magnetic conductor 201 can be provided as an integrated structure, such as a stamping integrated structure or a welded integrated structure.

[0056] Alternatively, the first magnetic conductor 201 comprises the stator yoke 4 and the stator teeth 5, and the stator teeth 5 are assembled to the inner side of the stator yoke 4, and the stator teeth 5 are used for winding the first winding 202. Meanwhile, the second magnetic conductor 301 comprises the stator yoke 4 and the stator teeth 5, and the stator teeth 5 are assembled to the outer side of the stator yoke 4, and the stator teeth 5 are used for winding the second winding 302.

[0057] In the embodiment, at least one of the first magnetic conductor 201 and the second magnetic conductor 301 comprises the stator yoke 4 and the stator teeth 5, and the stator teeth 5 are assembled to the side of the stator yoke 4 close to the rotor assembly 1. The split design enables the stator teeth 5 to be manufactured and wound separately, and the winding process can be completed before the stator teeth 5 are assembled. During the winding process, there is no problem of mutual interference between the inner and outer stators and between the stator teeth 5. The winding operation is more flexible, and the problem of inconvenience caused by limited space is solved. Moreover, the automatic production is facilitated, so as to improve the production efficiency.

[0058] In addition, the first stator 2 and the second stator 3 can work simultaneously, increase the acting area of the magnetic field, and improve the power density and electromagnetic torque of the motor.

[0059] Reference Figures 6-8 As shown in some embodiments of the utility model, one of the stator yoke 4 and the stator teeth 5 is provided with an assembly groove 6, and the other is provided with an assembly protrusion 7.

[0060] Specifically, the depth direction of the assembly groove 6 is provided along the radial direction of the stator yoke 4, and the slot opening of the assembly groove 6 faces the stator teeth 5. The assembly protrusion 7 is provided in the assembly groove 6. For example Figures 6-8 As shown, they are all examples of providing the assembly groove 6 on the stator yoke 4 and providing the assembly protrusion 7 on the stator teeth 5. It can be understood that the assembly protrusion 7 can also be provided on the stator yoke 4, and the assembly groove 6 can be provided on the stator teeth 5.

[0061] In this embodiment, the assembly protrusion 7 is embedded in the assembly groove 6, which can accurately control the relative position of the stator tooth 5 and the stator yoke 4, ensure the installation position accuracy of the stator tooth 5 on the stator yoke 4, avoid assembly errors, and improve the overall performance of the motor. At the same time, the design of the assembly groove 6 and the assembly protrusion 7 provides a guiding effect for the installation of the stator tooth 5, facilitating quick positioning and assembly.

[0062] In addition, the assembly protrusion 7 can limit the circumferential movement of the stator tooth 5 during the operation of the motor. For example, during the operation of the motor, the stator will be subjected to various forces such as electromagnetic force, which may cause the stator tooth 5 to displace along the circumference of the stator yoke 4. The structure of the assembly groove 6 and the assembly protrusion 7 can effectively resist such circumferential displacement, maintain the stable relative position between the stator tooth 5 and the rotor assembly 1, and thus maintain the stability of the magnetic field structure of the motor.

[0063] In some embodiments of the present application, the assembly groove 6 and the assembly protrusion 7 are limited in position with each other along the depth direction of the assembly groove 6.

[0064] In this embodiment, the assembly protrusion 7 and the assembly groove 6 are limited in position with each other along the depth direction of the assembly groove 6, which can ensure the accuracy of the radial position of the stator tooth 5. The accurate radial position can ensure that the air gap between the stator tooth 5 and the rotor assembly 1 meets the design requirements, and the magnetic field distribution reaches the best state.

[0065] During the operation of the motor, the stator will be subjected to a radial force from the rotor assembly 1. The limiting action between the assembly groove 6 and the assembly protrusion 7 can effectively disperse this force to the entire stator yoke 4, maintaining the stability of the stator.

[0066] Optionally, as shown in Figures 7-8 along the axial direction of the stator yoke 4, the assembly groove 6 penetrates the surface of at least one end of the stator yoke 4, so as to facilitate the placement of the assembly protrusion 7 into the assembly groove 6 from one end of the stator yoke 4.

[0067] Optionally, as shown in Figures 7-8 the assembly groove 6 is set as a trapezoidal groove. Specifically, the cross section of the assembly groove 6 along the axial direction of the stator yoke 4 is trapezoidal, for example, the trapezoid is an isosceles trapezoid or a right trapezoid. Correspondingly, the cross section of the assembly protrusion 7 along the axial direction of the stator yoke 4 is trapezoidal, and the assembly protrusion 7 is inserted into the assembly groove 6 along the axial direction of the stator yoke 4.

[0068] Of course, the assembly groove 6 is not limited to being set as a trapezoidal groove. For example, in some embodiments of the present application which are not shown, the assembly groove 6 can be set as a T-shaped groove, i.e. the cross section of the assembly groove 6 along the axial direction of the stator yoke 4 is "T" shaped, and correspondingly, the cross section of the assembly protrusion 7 along the axial direction of the stator yoke 4 is "T" shaped.

[0069] In some embodiments of the utility model, the first magnetic conducting member 201 and the second magnetic conducting member 301 each comprise a stator yoke 4 and a stator tooth 5.

[0070] Wherein, reference Figure 1 And Figure 2 As shown in the figure, the stator tooth 5 of the first magnetic conducting member 201 corresponds to the stator tooth 5 of the second magnetic conducting member 301, and along the radial direction of the rotor assembly 1, the stator tooth 5 of the first magnetic conducting member 201 is oppositely arranged with the corresponding stator tooth 5 of the second magnetic conducting member 301, for example, along the radial direction of the rotor assembly 1, the stator tooth 5 of the first magnetic conducting member 201 is coaxially arranged with the corresponding stator tooth 5 of the second magnetic conducting member 301. Optionally, the stator tooth 5 of the first magnetic conducting member 201 and the stator tooth 5 of the second magnetic conducting member 301 are the same in number and oppositely arranged in one-to-one correspondence.

[0071] In this embodiment, this corresponding arrangement can make the magnetic fields of the two magnetic conducting members superimpose and complement each other, reducing the interference of the inner and outer magnetic circuits. For example, when the current passes through the winding, the stator tooth 5 of the first magnetic conducting member 201 generates a magnetic field, and the corresponding stator tooth 5 of the second magnetic conducting member 301 generates a magnetic field which interacts with it. Since they are oppositely arranged, the magnetic field in the air gap will be stronger and more uniform, thereby helping to reduce the distortion of the magnetic field, making the intensity difference of the magnetic field at different positions smaller, and thus improving the electromagnetic performance of the motor.

[0072] In addition, the corresponding arrangement of the stator tooth 5 can better guide the magnetic field lines, making the magnetic field lines form a more efficient closed loop between the two magnetic conducting members, thereby reducing the magnetic leakage phenomenon.

[0073] In some embodiments of the utility model, the stator yoke 4 and the stator tooth 5 are bonded, for example, the assembly protrusion 7 and the assembly groove 6 between the stator yoke 4 and the stator tooth 5 are bonded.

[0074] In this embodiment, bonding makes the stator yoke 4 and the stator tooth 5 form a more compact overall structure. For example, during the operation of the motor, the stator will be subjected to various forces, such as electromagnetic force, centrifugal force, etc. Through bonding, these forces can be more effectively transmitted and dispersed in the entire magnetic conducting member, reducing the situation of local stress concentration.

[0075] In addition, the assembly protrusion 7 and the assembly groove 6 themselves have a positioning effect, and bonding further strengthens this positioning effect, preventing the assembly protrusion 7 from sliding in the assembly groove 6, so that the stator tooth 5 can be accurately installed on the stator yoke 4 according to the design requirements, and a stable position can be maintained during the entire use process.

[0076] In some embodiments of the utility model, the rotor assembly 1 comprises a bracket 102 and a magnet group 101.

[0077] The bracket 102 is provided in a ring structure, and the magnet group 101 is arranged on the bracket 102. That is, the bracket 102 can be used to support and fix the magnet group 101.

[0078] Optionally, referring to Figure 12 As shown in the figure, the magnet group 101 is arranged on the bracket 102 and arranged in a Halbach array, and the magnetic field strength on the side of the magnet group 101 close to the first stator 2 is greater than that on the side close to the second stator 3, or in other words, the magnetic field strength on the outer side of the magnet group 101 is greater than that on the inner side. It can be understood that the air gap distribution circle between the rotor assembly and the first stator is larger than that between the rotor assembly and the second stator.

[0079] In this embodiment, the stronger magnetic field generated by the magnet group 101 on the side of magnetic concentration can more effectively pass through the larger air gap, forming a stronger magnetic field distribution in the air gap. The stronger the magnetic field strength, the greater the torque output by the motor, so it can output higher torque.

[0080] The non-magnetic concentration side of the magnet group 101 faces the second stator 3, which cooperates with the relatively small air gap, so that the magnetic flux change is relatively small, and the electromotive force induced in the motor winding is also lower, thereby the motor terminal voltage can be output lower. Low motor terminal voltage means that under the same power, the current during motor operation is relatively small, thereby reducing the heating of the winding, reducing energy loss, and improving the efficiency of the motor.

[0081] Of course, the magnet group 101 is not limited to the above arrangement, for example, in some embodiments not shown, the magnet group 101 is arranged on the bracket 102 and arranged in a Halbach array, and the magnetic field strength on the side of the magnet group 101 close to the first stator 2 is less than that on the side close to the second stator 3, or in other words, the magnetic field strength on the outer side of the magnet group 101 is less than that on the inner side. That is, the magnet group 101 is on the inner side.

[0082] In this embodiment, the weaker magnetic field on the outer side of the magnet group 101 can to some extent reduce the electromagnetic interference of the magnet group 101 to the external environment, for example, the interference to the external structure and other auxiliary equipment is smaller, so that the magnetically sensitive equipment can be arranged closer to the motor.

[0083] In addition, in this embodiment, the magnet group 101 is on the inner side, which can reduce the leakage of the magnetic field to the external space. The reduction of magnetic field leakage means that more magnetic field energy can be effectively used on the stator, thereby improving the utilization efficiency of magnetic energy.

[0084] Of course, the magnet group 101 is not limited to the Halbach array, for example, in some embodiments not shown, the magnet group 101 is arranged on the bracket 102 and arranged in a spoke array, that is, a permanent magnet spoke array.

[0085] In some embodiments provided by the utility model, the first winding 202 and the second winding 302 have the same winding direction.

[0086] In the embodiment, the same winding direction of the first winding 202 and the second winding 302 helps to ensure that the magnetic field directions generated by the first stator 2 and the second stator 3 are consistent, thereby enhancing the overall magnetic field strength and making the magnetic field distribution more uniform, so that the magnetic flux path inside the motor can be optimized, the magnetic resistance loss is reduced, and the motor efficiency is improved.

[0087] In addition, since the magnetic field directions generated by the first stator 2 and the second stator 3 are consistent, they jointly act on the rotor, which can increase the total magnetic field strength and further improve the output torque of the motor.

[0088] In some embodiments provided by the utility model, the first winding 202 and the second winding 302 are independently controllable.

[0089] In the embodiment, independent control allows dynamic adjustment of the current or voltage input of the first stator 2 and the second stator 3 according to actual operating conditions. For example, under different load conditions, the working state of each winding can be optimized to achieve optimal performance. In addition, in the case of partial load or light load, one winding can be selectively turned off to further save energy and prolong battery life.

[0090] In addition, if one of the windings fails, the other winding can still continue to work, which can provide a certain degree of redundancy and improve the reliability and safety of the motor.

[0091] Further, the first winding 202 and the second winding 302 have the same winding direction, and the magnet group 101 adopts a Halbach array, and the magnetic field strength near the first stator 2 side of the magnet group 101 is greater than that near the second stator 3 side.

[0092] In the embodiment, when the motor needs high torque, the first stator 2 and the second stator 3 can be selected to work simultaneously or the first stator 2 can be selected to work alone according to the required torque.

[0093] When the motor has a small torque demand and needs a higher speed, the second stator 3 can be selected to work alone, and the motor has lower energy consumption at the same terminal voltage at high speed. This is because the air gap distribution circle of the second stator 3 is smaller, and the effective outer circle is small, so the terminal voltage is relatively low.

[0094] In some embodiments provided by the utility model, the rotor assembly 1 includes a bracket 102 and a magnet group 101.

[0095] The bracket 102 is configured as a ring structure, for example, the bracket 102 is ring-fitted between the first stator 2 and the second stator 3. The bracket 102 has a receiving space 1021, and the bracket 102 has a first opening 1022 on the side facing the first stator 2, and a second opening 1023 on the side facing the second stator 3. Both the first opening 1022 and the second opening 1023 communicate with the receiving space 1021.

[0096] The magnet assembly 101 is disposed within the receiving space 1021. For example, the magnet assembly 101 includes multiple magnet blocks 1011, which are arranged circumferentially along the support 102, and all magnet blocks 1011 are disposed within the receiving space 1021.

[0097] In this embodiment, the bracket 102 is configured as a ring structure, with the ring fitting between the first stator 2 and the second stator 3 to form a sturdy support frame that can stably support the magnet assembly 101.

[0098] By providing a first opening 1022 and a second opening 1023 on the bracket 102, the magnet assembly 101 can interact more directly with the corresponding stator through the first opening 1022 or the second opening 1023, reducing unnecessary external magnetic field leakage or interference. Furthermore, the first opening 1022 and the second opening 1023 provide a channel for heat dissipation from the inside to the outside, which is beneficial for the heat dissipation of the magnet assembly 101, reducing the rotor temperature and improving the overall thermal management effect of the motor.

[0099] In some embodiments provided by this utility model, reference is made to Figure 10 As shown, there are multiple accommodating spaces 1021, and the magnet group 101 includes multiple magnet blocks 1011.

[0100] Multiple receiving spaces 1021 are distributed circumferentially along the rotor assembly 1, and each receiving space 1021 is provided with a corresponding magnet block 1011. For example, each receiving space 1021 is provided with a corresponding first opening 1022 and a second opening 1023.

[0101] In this embodiment, by placing magnet blocks 1011 with different characteristics (such as magnetic material, size, magnetization direction, etc.) in different accommodating spaces 1021, the magnetic field distribution around the rotor can be customized more flexibly. For example, Figure 10 The illustration shows an example in which a corresponding magnet block 1011 is placed in each accommodating space 1021, and the magnet group 101 is ultimately formed into a Hellbeck array.

[0102] In addition, multiple circumferentially distributed receiving spaces 1021 and magnet blocks 1011 help to form a more uniform magnetic field in the circumferential direction of the rotor.

[0103] In addition, when a magnet block 1011 malfunctions or its performance deteriorates, only the corresponding receiving space 1021 needs to be operated to replace or repair the magnet block 1011 therein. There is no need to disassemble and replace the entire magnet assembly 101 or rotor assembly 1 on a large scale, which greatly reduces maintenance costs and difficulty.

[0104] In some embodiments provided by this utility model, such as Figures 10-11 As shown, the bracket 102 includes a connecting ring 1027 and a separator 1026.

[0105] In this configuration, multiple partitions 1026 are connected to one end of the connecting ring 1027 along its axial direction, and the multiple partitions 1026 are distributed at intervals along the circumference of the rotor assembly 1, with the space between two adjacent partitions 1026 forming a receiving space 1021. For example, the partition 1026 may be a partition plate.

[0106] Understandably, reference Figure 11 As shown, the number of connecting rings 1027 can be one, and the spacers 1026 are all connected to one end of the connecting ring 1027 in the axial direction, thereby reducing the weight of the rotor assembly 1. Alternatively, in some embodiments not shown, the number of connecting rings 1027 can also be two, and the spacers 1026 are all connected between the two connecting rings 1027, which can improve the structural strength of the rotor assembly 1.

[0107] Optionally, a connecting hole may also be provided on the separator 1026 so that the magnet blocks 1011 in two adjacent receiving spaces 1021 can interact directly through the connecting hole.

[0108] In some embodiments provided by this utility model, reference is made to Figure 10 As shown, the bracket 102 is provided with a snap-fit ​​protrusion 1025. The snap-fit ​​protrusion 1025 limits the magnet assembly 101 in the radial direction of the rotor assembly 1, or in other words, the snap-fit ​​protrusion 1025 limits the magnet block 1011 of the magnet assembly 101 in the radial direction of the rotor assembly 1.

[0109] In this embodiment, the snap-fit ​​protrusion 1025 can fix the magnet block 1011 in the radial direction, effectively preventing the magnet block 1011 from moving or falling off due to vibration or centrifugal force during motor operation, thus ensuring the stability of the position of the magnet block 1011. At the same time, the physical limiting can increase the connection strength between the magnet block 1011 and the bracket 102, enhancing the rigidity and reliability of the overall structure.

[0110] In addition, the snap-fit ​​protrusion 1025 provides a clear positioning reference for the magnet block 1011, making the assembly process simpler and faster, reducing the need for manual adjustment, and improving assembly accuracy and efficiency.

[0111] Optionally, the snap-fit ​​protrusion 1025 is provided on the separator 1026 or the connecting ring 1027. (See reference) Figure 10 The image shows an example of a snap-fit ​​protrusion 1025 being disposed on a separator 1026.

[0112] Optionally, refer to Figure 10 As shown, along the radial direction of the rotor assembly 1, both ends of the magnet block 1011 are limited by corresponding snap-fit ​​protrusions 1025.

[0113] For example, the first opening 1022 has snap-fit ​​protrusions 1025 on both sides of the rotor assembly 1 in the circumferential direction, or in other words, the separator 1026 has a snap-fit ​​protrusion 1025 at one end near the first opening 1022. The snap-fit ​​protrusion 1025 limits the magnet block 1011 at one end near the first stator 2.

[0114] The second opening 1023 has locking protrusions 1025 on both sides in the circumferential direction of the rotor assembly 1, or in other words, the separator 1026 has a locking protrusion 1025 at one end near the second opening 1023. The locking protrusion 1025 limits the magnet block 1011 at one end near the second stator 3.

[0115] In this embodiment, along the radial direction of the rotor assembly 1, both ends of the magnet block 1011 are limited by corresponding snap-fit ​​protrusions 1025. The snap-fit ​​protrusions 1025 at both ends can provide reliable constraint in the radial direction, effectively resist centrifugal force, prevent the magnet block 1011 from undergoing radial displacement due to centrifugal force, and ensure the structural stability of the rotor assembly 1 when rotating at high speed.

[0116] In addition, the snap-fit ​​protrusions 1025 at both ends can precisely define the radial position of the magnet block 1011, so that the air gap between it and the stator remains uniform, avoiding uneven air gap caused by displacement of the magnet block 1011, thereby ensuring uniform magnetic field distribution of the motor and improving the electromagnetic performance of the motor.

[0117] Optionally, refer to Figure 10 As shown, the magnet block 1011 is set as a square block. The edge of the magnet block 1011 near the snap-fit ​​protrusion 1025 has rounded corners. The surface of the snap-fit ​​protrusion 1025 near the magnet block 1011 has an arc surface, and the arc surface fits with the rounded corner of the snap-fit ​​protrusion 1025.

[0118] In this embodiment, by providing rounded corners on the edges of the magnet block 1011 and providing corresponding arc surfaces on the snap-fit ​​protrusion 1025, the stress at the contact point can be effectively dispersed, avoiding material fatigue or damage caused by stress concentration.

[0119] refer to Figure 11As shown, in some embodiments provided by this utility model, along the axial direction of the rotor assembly 1, one end of the bracket 102 is provided with a mounting port 1024, that is, the orientation of the mounting port 1024 is consistent with the axial direction of the rotor assembly 1. The mounting port 1024 communicates with the receiving space 1021, and the mounting port 1024 is used for the magnet block 1011 of the magnet assembly 101 to pass through.

[0120] In this embodiment, a mounting port 1024 is provided on the bracket 102 to facilitate the installation or removal of the magnet block 1011. Furthermore, the design of the mounting port 1024 also helps the magnet block 1011 dissipate heat through the mounting port 1024, thereby reducing the rotor temperature.

[0121] Optionally, the number of mounting ports 1024 and the number of accommodating spaces 1021 are the same and correspond one-to-one.

[0122] Optionally, refer to Figure 11 As shown, when a connecting ring 1027 is provided at one end of the separator 1026, the distance between the ends of two adjacent separators 1026 away from the connecting ring 1027 forms a mounting opening 1024. In some embodiments not shown, when both ends of the separator 1026 are provided with connecting rings 1027, the mounting opening 1024 can be provided on any one of the connecting rings 1027 and pass through the corresponding connecting ring 1027.

[0123] In some embodiments provided by this utility model, the magnet assembly 101 is bonded and fixed within the receiving space 1021. For example, the magnet block 1011 of the magnet assembly 101 is bonded to at least one of the separator 1026 and the connecting ring 1027. In this way, the stability of the magnet assembly 101 within the receiving space 1021 can be improved.

[0124] In some embodiments provided by this utility model, the stator teeth 5 are configured as oriented silicon steel blocks.

[0125] In this embodiment, the grain-oriented silicon steel exhibits excellent magnetic permeability and low iron loss characteristics in the rolling direction, reducing hysteresis and eddy current losses of the stator teeth 5 in the alternating magnetic field and improving the efficiency of the motor. Furthermore, the high magnetic permeability of the grain-oriented silicon steel in the rolling direction enables more effective magnetic field conduction, enhancing the magnetic field conduction capability of the stator teeth 5, optimizing the magnetic circuit design, and improving the performance of the motor.

[0126] Of course, stator tooth 5 can also be made of amorphous iron core. Amorphous iron core has lower iron loss, which can significantly reduce the hysteresis loss and eddy current loss of stator tooth 5 and improve the efficiency of the motor.

[0127] This utility model also provides a vehicle in its embodiments.

[0128] Specifically, the vehicle includes the dual-stator motors described above.

[0129] It should be noted that the vehicle includes a dual-stator motor, and therefore also includes all the advantages of a dual-stator motor mentioned above, so this will not be elaborated further.

[0130] In addition, the vehicles include, but are not limited to, vehicles and aircraft. Among them, vehicles include, but are not limited to, pure electric vehicles or hybrid vehicles.

[0131] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A dual stator electric machine characterized by, The application relates to a rotor assembly (1) provided as a ring structure. A first stator (2) comprises a first magnetic conducting member (201) and a first winding (202), the first magnetic conducting member (201) is sleeved on the outside of the rotor assembly (1), and the first winding (202) is arranged on the first magnetic conducting member (201). A second stator (3) comprises a second magnetic conducting member (301) and a second winding (302), the second magnetic conducting member (301) is sleeved on the inside of the rotor assembly (1), and the second winding (302) is arranged on the second magnetic conducting member (301). At least one of the first magnetic conducting member (201) and the second magnetic conducting member (301) comprises a stator yoke (4) and a plurality of stator teeth (5), the stator yoke (4) is sleeved with the rotor assembly (1), and the plurality of stator teeth (5) are assembled on one side of the stator yoke (4) close to the rotor assembly (1) and are used for winding the first winding (202) or the second winding (302). One of the stator yoke (4) and the stator tooth (5) is provided with an assembly groove (6), and the other is provided with an assembly protrusion (7), the depth direction of the assembly groove (6) is arranged along the radial direction of the stator yoke (4), and the assembly protrusion (7) is arranged in the assembly groove (6).

2. The dual stator electric machine of claim 1, wherein, The winding directions of the first winding (202) and the second winding (302) are the same.

3. The dual stator electric machine of claim 1, wherein, The first winding (202) and the second winding (302) can be independently controlled. The first magnetic conducting member (201) and the second magnetic conducting member (301) both comprise the stator yoke (4) and the stator tooth (5).

4. The dual stator electric machine of claim 1, wherein, The stator tooth (5) of the first magnetic conducting member (201) corresponds to the stator tooth (5) of the second magnetic conducting member (301) one by one, and the stator tooth (5) of the first magnetic conducting member (201) is oppositely arranged with the corresponding stator tooth (5) of the second magnetic conducting member (301) along the radial direction of the rotor assembly (1). The rotor assembly (1) comprises:

5. Double stator electric machine according to any of claims 1-4, characterized in that, A support (102) provided as a ring structure; A magnet group (101) arranged in the support (102), the magnet group (101) is arranged in a Halbach array, and the magnetic field intensity of the side of the magnet group (101) close to the first stator (2) is greater than or less than the magnetic field intensity of the side close to the second stator (3), or the magnet group (101) is arranged in a spoke array. The support (102) is provided with a containing space (1021) inside, one side of the support (102) towards the first stator (2) is provided with a first opening (1022), one side of the support (102) towards the second stator (3) is provided with a second opening (1023), the first opening (1022) and the second opening (1023) are both in communication with the containing space (1021), and the magnet group (101) is arranged in the containing space (1021).

6. The dual stator electric machine of claim 5, wherein, ​ 7. The dual stator electric machine of claim 6, wherein, The number of the accommodation spaces (1021) is multiple, and the magnet group (101) comprises multiple magnet blocks (1011); The multiple accommodation spaces (1021) are distributed along the circumference of the rotor assembly (1), and each of the accommodation spaces (1021) is provided with a corresponding magnet block (1011).

8. The dual stator electric machine of claim 7, wherein, The support (102) comprises a connecting ring (1027) and a partition (1026); The multiple partitions (1026) are connected to one end of the connecting ring (1027) in the axial direction, and the multiple partitions (1026) are distributed along the circumference of the rotor assembly (1) at intervals, and the space between any two adjacent partitions (1026) forms the accommodation space (1021).

9. The dual stator electric machine of claim 6, wherein, The support (102) is provided with a clamping protrusion (1025), and the clamping protrusion (1025) limits the magnet group (101) in the radial direction of the rotor assembly (1).

10. A carrier, characterized by The double-stator motor comprises the double-stator motor according to any one of claims 1-9.

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