Motor

Abstract

The utility model discloses a motor, and belongs to the technical field of motors. The motor comprises a rotor core, a stator core and a motor shell. The plurality of stator modules in the stator iron core can be produced in a segmented and modularized manner, so that the mold cost is greatly saved, the iron core material is saved, and the wire embedding efficiency is improved. The stator module can be fixed on the inner side wall of the motor shell through the cooperation of the first limiting parts in the stator module and the second limiting parts in the mounting bulges by arranging the plurality of groups of mounting bulges in array distribution on the inner side wall of the motor shell. Thus, one stator module is distributed between every two adjacent installation protrusions, that is, the installation protrusions can be magnetic isolation strips, and the effects that magnetic flux between the adjacent stator modules is isolated, higher harmonics are hindered, and therefore torque pulsation is reduced are achieved. Besides, the motor shell can generate certain eddy-current loss in an alternating magnetic field, and each group of mounting bulges consists of a plurality of segmented sub-mounting bulges, so that the eddy-current loss can be effectively reduced, and the performance of the motor is improved.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a motor. Background Art

[0002] Electric motors (e.g., radial flux motors) are commonly used in industrial applications. The alternating magnetic field within these motors generates eddy currents. Large eddy currents can lead to eddy current losses, such as wasted energy and magnetic field loss, which can degrade motor performance. Utility Model Content

[0003] The present invention provides a motor that can solve the problem in the prior art of large eddy currents in motors, which leads to eddy current losses and thus degraded motor performance. The technical solution is as follows:

[0004] In one aspect, a motor is provided, comprising:

[0005] Rotor core, stator core and motor housing;

[0006] The rotor core is used to sleeve the motor shaft;

[0007] The stator core comprises: a plurality of stator modules distributed in an array along the circumferential direction of the rotor core, wherein two target ends of each stator module arranged opposite to each other along the circumferential direction respectively have a first limiter, and a gap is formed between the target ends of each two adjacent stator modules;

[0008] The inner side wall of the motor housing has a plurality of groups of mounting protrusions distributed in an array along the circumference of the motor housing, each two adjacent stator modules correspond to a group of mounting protrusions, each group of mounting protrusions includes: a plurality of sub-mounting protrusions distributed in an array along the axial direction of the motor housing, each sub-mounting protrusion in each group of mounting protrusions has two second limiting members corresponding to the two first limiting members in the corresponding stator module;

[0009] Wherein, each group of the mounting protrusions is inserted into one of the gaps so as to sleeve and fix the motor housing on the outer side surface of the stator core.

[0010] Optionally, the multiple sub-mounting protrusions in each group of the mounting protrusions are distributed at equal intervals.

[0011] Optionally, one of the first limiting member and the second limiting member is a limiting protrusion, and the other of the first limiting member and the second limiting member is a limiting groove that cooperates with the limiting protrusion.

[0012] Optionally, when one of the first limiting member and the second limiting member is a limiting protrusion, the outer side surface of the limiting protrusion is an arc-shaped convex surface.

[0013] Optionally, the width of the gap along the circumferential direction of the stator core ranges from 4 mm to 6.5 mm.

[0014] Optionally, the motor further includes: a cooling pipe that is at least partially fixed in the gap and distributed on a side of the inner side wall of the mounting protrusion facing away from the motor housing.

[0015] Optionally, the motor further includes: an insulating support member that is at least partially fixed in the gap and distributed on a side of the mounting protrusion facing away from the inner side wall of the motor housing.

[0016] Optionally, each of the stator modules includes: an arc-shaped stator yoke and a stator tooth, one end of the stator tooth is fastened to the arc-shaped stator yoke, and the stator tooth extends toward the axial direction of the stator core, and the stator tooth is used to wind a stator winding;

[0017] There is a gap between every two adjacent target ends of the arc-shaped stator yokes, and the first limiting members are distributed at the target ends of the arc-shaped stator yokes.

[0018] Optionally, the ratio of the radial height of the mounting protrusion to the radial height of the arc-shaped stator yoke is in a range of 1 / 3 to 2 / 3.

[0019] Optionally, one end of the stator tooth facing away from the arc-shaped stator yoke portion has a limiting plate, and the stator winding is distributed between the arc-shaped stator yoke portion and the limiting plate.

[0020] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0021] A motor may include: a rotor core, a stator core and a motor housing. The multiple stator modules in the stator core can be produced in segments and modules, which greatly saves mold costs, saves core materials and improves wire embedding efficiency. By providing multiple groups of array-distributed mounting protrusions on the inner side wall of the motor housing, the cooperation of the first limiter in the stator module and the second limiter in the mounting protrusion can fix the stator module on the inner side wall of the motor housing. In this way, a stator module is distributed between two adjacent mounting protrusions, that is, the mounting protrusion can be a magnetic isolation strip, which plays a role in isolating the magnetic flux between adjacent stator modules, blocking high-order harmonics and thus reducing torque pulsation. In addition, the motor housing will generate certain eddy current losses in the alternating magnetic field. Each group of mounting protrusions is composed of multiple segmented sub-mounting protrusions. In this way, the eddy current losses of the motor can be effectively reduced and the performance of the motor can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0023] Figure 1 is a structural schematic diagram of a motor provided by an embodiment of the present application;

[0024] Figure 2 is Figure 1 is an exploded schematic diagram of a motor;

[0025] Figure 3 is Figure 1 is a front view of a motor;

[0026] Figure 4 is an exploded schematic diagram of another motor provided by an embodiment of the present application;

[0027] Figure 5 is a front view of another motor provided by an embodiment of the present application;

[0028] Figure 6 is a schematic diagram of average torque and torque ripple changing with magnetic barrier spacing provided by an embodiment of the present application;

[0029] Figure 7 is a structural schematic diagram of a cooling pipe provided by an embodiment of the present application;

[0030] Figure 8 is a structural schematic diagram of a stator module and a stator winding provided by an embodiment of the present application;

[0031] Figure 9 is a structural schematic diagram of another stator module and stator winding provided by an embodiment of the present application;

[0032] Figure 10 is a connection schematic diagram of a stator module and a mounting protrusion provided by an embodiment of the present application.

[0033] The above drawings have shown the specific embodiments of the present application, and the following description will be more detailed. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application by any means, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] It should be understood that references throughout this specification to "one embodiment" or "an embodiment" mean that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present invention. Therefore, the appearances of "in one embodiment" or "in an embodiment" throughout this specification do not necessarily refer to the same embodiment. Furthermore, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0037] Eddy current: Eddy current (EC), also known as Foucault current, refers to the current induced in a conductor when the conductor moves in a non-uniform magnetic field or is in a magnetic field that changes with time.

[0038] Eddy Current Loss: Eddy Current Loss refers to the energy loss caused by the induced current in the conductor when the conductor moves in a non-uniform magnetic field or is in a magnetic field that changes with time.

[0039] Please refer to Figure 1 、 Figure 2 and Figure 3 , Figure 1 is a structural diagram of a motor provided in an embodiment of the present application, Figure 2 yes Figure 1 An exploded schematic diagram of the motor is shown. Figure 3 yes Figure 1 The front view of the motor is shown. This motor can be used in various fields, including aviation, defense, industrial and agricultural production, and daily life. Specifically, the motor can be used in industrial drives, automation equipment, fans, pumps, compressors, machine tools, robots, aircraft, ships, and vehicles. Motor 000 can include: a rotor core 100, a stator core 200, and a motor housing 300.

[0040] The rotor core 100 in the motor 000 can be used to be sleeved on a motor shaft (not shown in the figure).

[0041] The stator core 200 in the motor 000 may include: a plurality of stator modules 201 distributed in a circumferential array along the rotor core 100 (here, there is an air gap between the plurality of stator modules 201 and the rotor core 100), and each stator module 201 may have two target ends relatively arranged along the circumference of the stator module 201 respectively having a first limit member 201a, and a gap Z may be provided between the target ends of each two adjacent stator modules 201.

[0042] The inner sidewall of the motor housing 300 in the motor 000 may have multiple groups of mounting protrusions 301 distributed in an array along the circumference of the motor housing 300. Each group of mounting protrusions 301 may correspond to each of two adjacent stator modules 201. Each group of mounting protrusions 301 may include: multiple sub-mounting protrusions 301a distributed in an array along the axial direction of the motor housing 300. Each sub-mounting protrusion 301a in each group of mounting protrusions 301 may have two second stoppers A that mate with the two first stoppers 201a in the corresponding stator module 201. For example, the motor housing 300 may be made of a non-magnetic aluminum alloy, and the motor housing 300 and the multiple groups of mounting protrusions 301a may be an integral structure.

[0043] Each set of mounting protrusions 301 in the motor housing 300 can be inserted into a gap Z formed between two adjacent stator modules 201 to fix the stator core 200 on the inner wall of the cavity in the motor housing 300 .

[0044] For example, motor 000 (e.g., an electric motor) can be a permanent magnet synchronous motor, in which rotor core 100 is mounted and fixed to the motor shaft and can rotate relative to stator core 200. When motor 000 is operating, the magnetic fields of stator core 200 and rotor core 100 interact to cause rotor core 100 to rotate relative to stator core 200. When rotor core 100 rotates, it can drive the motor shaft to rotate, and motor 000 outputs power through the motor shaft.

[0045] In the embodiment of the present application, the multiple stator modules 201 in the stator core 200 can be produced in a segmented modular manner, which greatly saves mold costs, saves core materials, and improves wire embedding efficiency. By providing multiple groups of array-distributed mounting protrusions 301 on the inner side wall of the motor housing 300, the first stopper 201a in the stator module 201 and the second stopper A in the mounting protrusion 301 can cooperate to fix the stator module 201 on the inner side wall of the motor housing. In this way, there is a stator module 201 distributed between two adjacent mounting protrusions 301, that is, the mounting protrusion 301 can serve as a magnetic isolation strip, which plays a role in isolating the magnetic flux between adjacent stator modules 201, blocking high-order harmonics, thereby reducing torque pulsation, and ensuring that the motor output torque remains basically unchanged. In addition, the motor housing 300 will generate a certain amount of eddy current loss in the alternating magnetic field. Each group of mounting protrusions 301 is composed of multiple segmented sub-mounting protrusions 301a. In this way, the eddy current loss of the motor 000 can be effectively reduced, and the performance of the motor 000 can be improved.

[0046] In summary, an embodiment of the present application provides a motor, which may include: a rotor core, a stator core and a motor housing. The multiple stator modules in the stator core can be produced in segments and modules, which greatly saves mold costs, saves core materials and improves wire embedding efficiency. By providing multiple groups of array-distributed mounting protrusions on the inner side wall of the motor housing, the cooperation of the first limit member in the stator module and the second limit member in the mounting protrusion can fix the stator module on the inner side wall of the motor housing. In this way, a stator module is distributed between two adjacent mounting protrusions, that is, the mounting protrusion can be a magnetic isolation strip, which plays a role in isolating the magnetic flux between adjacent stator modules, blocking high-order harmonics and thus reducing torque pulsation. In addition, the motor housing will generate certain eddy current losses in the alternating magnetic field. Each group of mounting protrusions is composed of multiple segmented sub-mounting protrusions. In this way, the eddy current losses of the motor can be effectively reduced and the performance of the motor can be improved.

[0047] Optionally, the multiple sub-mounting protrusions 301a in each group of mounting protrusions 301 in the motor housing 300 can be distributed at equal intervals. In this case, by distributing the multiple sub-mounting protrusions 301a in each group of mounting protrusions 301 in the motor housing 300 at equal intervals, the eddy current loss of the motor can be further effectively reduced, thereby improving the performance of the motor.

[0048] In the examples of this application, please refer to Figure 4 , Figure 4Schematic diagram of another motor provided by an embodiment of the present application. One of the first stopper 201a fixed to the target end of the stator module 201 and the second stopper A fixed to the sub-mounting protrusion 301a can be a stopper protrusion a1, and the other of the first stopper 201a fixed to the target end of the stator module 201 and the second stopper A fixed to the sub-mounting protrusion 301a can be a stopper groove a2 that cooperates with the stopper protrusion. In this case, the cooperation between the first stopper 201a and the second stopper A can not only improve the installation stability between the stator module 201 and the mounting protrusion 301, but also play a role in installation positioning, thereby improving the installation convenience of the motor housing 300 and multiple stator modules 201.

[0049] For example, the first stopper 201a fixed to the target end of the stator module 201 can be a stopper protrusion a1, and the second stopper A fixed to the sub-mounting protrusion 301a can be a stopper groove a2. Alternatively, the first stopper 201a fixed to the target end of the stator module 201 can be a stopper groove a2, and the second stopper A fixed to the sub-mounting protrusion 301a can be a stopper protrusion a1.

[0050] In the present application, when one of the first limiting member 201a and the second limiting member A is a limiting protrusion a1, the outer side surface of the limiting protrusion a1 may be an arc-shaped convex surface. For example, the outer side surface of the limiting protrusion a1 may be an arc-shaped convex surface.

[0051] Optional, please refer to Figure 5 , Figure 5 : This is a front view of another motor provided by an embodiment of the present application. The width d of the gap Z (i.e., the magnetic barrier spacing) between each two adjacent stator modules 201 along the circumferential direction of the stator core 200 can range from 4 mm to 6.5 mm. For example, the width d of the gap Z between each two adjacent stator modules 201 along the circumferential direction of the stator core 200 can be 4 mm, 5 mm, 6 mm, or 6.5 mm. Please refer to Figure 6 , Figure 6 This is a schematic diagram of the average torque and torque ripple as the magnetic barrier spacing changes, as provided in an embodiment of the present application. As can be seen from the figure, as the magnetic barrier spacing gradually increases within a certain range, the torque ripple pkavg of the motor gradually decreases, while the average torque avg of the motor does not change much.

[0052] In the examples of this application, please refer to Figure 5 and Figure 7 , Figure 7: is a structural schematic diagram of a cooling pipe provided in an embodiment of the present application. The motor 000 may also include: a cooling pipe 400 that is at least partially fixed in the gap Z between the two stator modules 201 and distributed on the side of the inner wall of the mounting protrusion 301 facing away from the motor housing 300. In this case, by fixing at least part of the cooling pipe 400 in the gap Z between the two stator modules 201, the coolant in the cooling pipe 400 can effectively reduce the heat generated when the motor is working, thereby improving the performance of the motor 000. Here, the cooling pipe 400 can be a bent pipe made of non-magnetic material. For example, the cooling pipe 400 includes: a plurality of sub-cooling pipes 401 connected end to end, the outermost sub-cooling pipe 401 having a liquid inlet b1, and the other outermost sub-cooling pipe 401 having a liquid outlet b2. Among them, a part of the sub-cooling pipes 401 are distributed in the gap Z, and another part of the sub-cooling pipes 401 are distributed on the outer side of the stator module 201.

[0053] Optionally, the motor 000 may further include an insulating support member (not shown) that is at least partially fixed within the gap Z between the two stator modules 201 and is located on the side of the inner wall of the mounting protrusion 301 facing away from the motor housing 300. By providing the insulating support member within the gap Z, the overall rigidity of the stator core can be effectively enhanced, and the operating noise of the motor can be reduced. For example, the insulating support member may be made of a resin material.

[0054] It should be noted that, when no cooling pipe or insulating support is provided in the gap Z between two adjacent stator modules 201 , the remaining area in the gap Z except for the mounting protrusion 301 can be used as an air cooling channel.

[0055] In the examples of this application, please refer to Figure 8 and Figure 9 , Figure 8 is a structural diagram of a stator module and stator winding provided in an embodiment of the present application, Figure 9 It is a structural schematic diagram of another stator module and stator winding provided in an embodiment of the present application. Each stator module 201 in the stator core 200 may include: an arc-shaped stator yoke 201b and a stator tooth 201c, one end of the stator tooth 201c may be fastened to the arc-shaped stator yoke 201b, and the stator tooth 201c may extend toward the axial direction of the stator core 200, and the stator tooth 201c may be used to wind the stator winding B. There may be a gap Z between the target ends of each two adjacent arc-shaped stator yokes 201b, and the first limiter 201a may be distributed at the target end of the arc-shaped stator yoke 201b. For example, each stator module 201 may include two stator teeth 201c fixedly connected to the arc-shaped stator yoke 201b. It should be noted that in order to see the structure of the stator module 201 more clearly, Figure 8 Only one stator winding B is shown.

[0056] In this application, please refer to Figure 8 、 Figure 9 and Figure 10 , Figure 10 : This is a schematic diagram of the connection between a stator module and a mounting protrusion provided in an embodiment of the present application. The ratio of the radial height of the mounting protrusion 301 in the motor housing 300 to the radial height of the arc-shaped stator yoke 201b can be in the range of 1 / 3 to 2 / 3. For example, the ratio of the radial height of the mounting protrusion 301 to the radial height of the arc-shaped stator yoke can be 1 / 3, 1 / 2, or 2 / 3. Here, the radial height of the mounting protrusion 301 can be the radial height of each sub-mounting protrusion 301a.

[0057] Optional, such as Figure 8 and Figure 9 As shown, a stator tooth 201c in each stator module 201 may have a retaining plate 201d at one end facing away from the arcuate stator yoke 201b, and the stator winding B may be distributed between the arcuate stator yoke 201b and the retaining plate 201d. Thus, the retaining plate 201d can retain the stator winding B within the area between the arcuate stator yoke 201b and the retaining plate 201d, thereby improving the installation stability of the stator winding B and the stator module 201 and ensuring good motor performance.

[0058] In summary, an embodiment of the present application provides a motor, which may include: a rotor core, a stator core and a motor housing. The multiple stator modules in the stator core can be produced in segments and modules, which greatly saves mold costs, saves core materials and improves wire embedding efficiency. By providing multiple groups of array-distributed mounting protrusions on the inner side wall of the motor housing, the cooperation of the first limit member in the stator module and the second limit member in the mounting protrusion can fix the stator module on the inner side wall of the motor housing. In this way, a stator module is distributed between two adjacent mounting protrusions, that is, the mounting protrusion can be a magnetic isolation strip, which plays a role in isolating the magnetic flux between adjacent stator modules, blocking high-order harmonics and thus reducing torque pulsation. In addition, the motor housing will generate certain eddy current losses in the alternating magnetic field. Each group of mounting protrusions is composed of multiple segmented sub-mounting protrusions. In this way, the eddy current losses of the motor can be effectively reduced and the performance of the motor can be improved.

[0059] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless expressly limited otherwise.

[0060] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A motor, characterized in that: include: Rotor core, stator core and motor housing; The rotor core is used to sleeve the motor shaft; The stator core comprises: a plurality of stator modules distributed in an array along the circumferential direction of the rotor core, wherein two target ends of each stator module arranged opposite to each other along the circumferential direction respectively have a first limiter, and a gap is formed between the target ends of each two adjacent stator modules; The inner side wall of the motor housing has a plurality of groups of mounting protrusions distributed in an array along the circumference of the motor housing, each two adjacent stator modules correspond to a group of mounting protrusions, each group of mounting protrusions includes: a plurality of sub-mounting protrusions distributed in an array along the axial direction of the motor housing, each sub-mounting protrusion in each group of mounting protrusions has two second limiting members corresponding to the two first limiting members in the corresponding stator module; Wherein, each group of the mounting protrusions is inserted into one of the gaps so as to sleeve and fix the motor housing on the outer side surface of the stator core.

2. The motor according to claim 1, characterized in that The multiple sub-mounting protrusions in each group of the mounting protrusions are distributed at equal intervals.

3. The motor according to claim 1, characterized in that One of the first limiting member and the second limiting member is a limiting protrusion, and the other of the first limiting member and the second limiting member is a limiting groove matched with the limiting protrusion.

4. The motor according to claim 3, characterized in that In the case where one of the first limiting member and the second limiting member is a limiting protrusion, the outer side surface of the limiting protrusion is an arc-shaped convex surface.

5. The motor according to claim 1, characterized in that The width of the gap along the circumferential direction of the stator core ranges from 4 mm to 6.5 mm.

6. The motor according to claim 1, characterized in that The motor further comprises: a cooling pipe which is at least partially fixed in the gap and distributed on a side of the inner side wall of the mounting protrusion away from the motor housing.

7. The motor according to claim 1, characterized in that The motor further includes: an insulating support member which is at least partially fixed in the gap and is distributed on a side of the mounting protrusion facing away from the inner side wall of the motor housing.

8. The motor according to any one of claims 1 to 7, characterized in that: Each of the stator modules includes: an arc-shaped stator yoke and a stator tooth, one end of the stator tooth is fastened to the arc-shaped stator yoke, and the stator tooth extends toward the axial direction of the stator core, and the stator tooth is used to wind the stator winding; There is a gap between every two adjacent target ends of the arc-shaped stator yokes, and the first limiting members are distributed at the target ends of the arc-shaped stator yokes.

9. The motor according to claim 8, characterized in that The ratio of the radial height of the mounting protrusion to the radial height of the arc-shaped stator yoke is in a range of 1 / 3 to 2 / 3.

10. The motor according to claim 8, characterized in that One end of the stator tooth facing away from the arc-shaped stator yoke is provided with a limiting plate, and the stator winding is distributed between the arc-shaped stator yoke and the limiting plate.

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