Motor stator and flattened high-power motor

Abstract

The utility model discloses a motor stator. The motor stator comprises a stator magnetic core and a stator winding, the stator magnetic core comprises four side edges, and every two adjacent side edges are perpendicular to each other; each transition section is used for connecting two adjacent side edges, and the transition sections are arc-shaped; each stator tooth part is formed by extending from the side edge to the interior of the stator magnetic core, each stator tooth part comprises a far end far away from the side edge, and the four far ends are encircled to form a first accommodating part; a second accommodating part is defined by the two adjacent stator tooth parts and the side edges, or the two adjacent stator tooth parts, the side edges and the transition section; the first accommodating part is communicated with the second accommodating part; the stator winding is wound on each stator tooth part, and the stator winding passes through and is accommodated in two adjacent second accommodating parts. According to the motor stator provided by the invention, the number of the stator windings can be set to the maximum extent in the second accommodating part, and the power of the motor is improved under the condition that the size of the motor is not enlarged.

Description

Technical Field

[0001] The present invention relates to the field of motors, and in particular to a motor stator and a flat high-power motor. Background Art

[0002] A motor is a commonly used driving device that converts electrical energy into mechanical kinetic energy. A motor generally includes a rotor and a stator, where the rotor and the stator are not in direct contact. The electrical energy is converted into a magnetic field through the stator winding coil set on the stator. The magnetic field acts on the rotor winding on the rotor, generating current in the rotor winding coil. The current drives the rotor to rotate under the action of the magnetic field, thereby realizing the conversion of electrical energy into mechanical energy.

[0003] However, as society continues to develop and progress, and people's quality of life continues to improve, the requirements for motors in the home appliance industry are also increasing. The development trend of motors in the home appliance industry requires small size, high torque, and high speed. Existing high-power motors in the home appliance industry, with power exceeding 1000W, require a total stator thickness of at least 40mm, assuming an input voltage of 110-220V. In other words, only when the total stator thickness exceeds 40mm can the magnetic field strength meet the required power requirements. However, motors with stators exceeding 40mm are difficult to manufacture, resulting in high defect rates and hindering motor miniaturization.

[0004] In addition, when the torque of the motor needs to be increased, the number of windings and the length of the motor stator winding coil must be increased. When the number of windings and the length of the stator winding coil increase, one solution is to only wind the stator winding coil horizontally while keeping the height of the stator winding coil basically unchanged, that is, the thickness of the stator winding coil increases significantly. At this time, the distance between the far end of the stator winding coil and the center line of the rotor becomes farther, and the magnetic field effect will be reduced, resulting in a decrease in the power conversion rate; another solution is to increase the height of the stator winding coil as the number of windings increases, but at this time the total thickness of the motor stator increases, which will inevitably increase the thickness of the motor and fail to meet the requirements of miniaturization.

[0005] How to provide a device that can accommodate more stator winding coils to increase motor power without increasing the total thickness of the stator is another technical problem that needs to be solved.

[0006] Another point is that motors also contain carbon brushes, which are primarily used to transfer current between the motor's stator and rotor. These are critical components in motors, typically contacting the commutator on the rotor. Through these brushes, current flows between the rotor and stator, enabling the motor to operate properly. There is a close relationship between carbon brush life and motor life. During operation, carbon brushes rub against the commutator, gradually wearing out. Worn carbon brushes can lead to decreased motor performance and even failure. Excessive load on the motor accelerates brush wear. Therefore, increasing carbon brush length to reduce motor failures caused by brush wear is a technical issue that needs to be addressed. Summary of the Invention

[0007] The object of the present invention is to provide a motor stator, aiming to solve the technical problem that the existing motor stators are difficult to increase the motor power due to insufficient structural space, resulting in a small number of windings and a short winding coil length.

[0008] The motor stator provided by the present invention includes a stator core and a stator winding. The stator core is an iron-containing magnetic conductor and includes:

[0009] Four side edges, wherein the four side edges are located in the same plane, and one side edge is perpendicular to another adjacent side edge;

[0010] Four transition segments, each transition segment is used to connect two adjacent side edges, the transition segment is arc-shaped, and the centers of the four transition segments overlap and are located inside the stator core;

[0011] at least four stator teeth, each of the stator teeth extending from the side toward the interior of the stator core, the stator teeth including a distal end away from the side, the distal ends collectively forming a first accommodating portion;

[0012] Two adjacent stator teeth and the side, or two adjacent stator teeth, the side and the transition section, form a second accommodating portion, and there are multiple second accommodating portions; the first accommodating portion is connected to the second accommodating portion;

[0013] The stator winding is wound around each of the stator teeth, and the stator winding passes through and is accommodated in two adjacent second accommodation portions.

[0014] Because the four sides of the motor stator of the present invention form a square-like shape, and the transition section is curved, the size of the second accommodating portion can be maximized within a square or circular installation space, thereby increasing the number and length of stator winding coils accommodated within the second accommodating portion. Furthermore, this structure prevents the stator core from increasing the number of stator winding coils, which would cause the distal ends of the stator winding coils to be farther away from the rotor centerline, thereby reducing the magnetic field effect and leading to a reduced power conversion efficiency. Furthermore, this structure also avoids increasing the thickness of the motor, facilitating miniaturization.

[0015] Another object of the present invention is to provide a flat high-power motor, aiming to solve the technical problem of the existing motor that the motor size increases due to the increase in motor power.

[0016] The flat high-power motor provided by the present invention comprises:

[0017] The above-mentioned motor stator;

[0018] A front bracket, the front bracket being mounted on an upper surface of the motor stator;

[0019] a rear bracket, the rear bracket being mounted on the lower surface of the motor stator;

[0020] a motor rotor, the motor rotor passing through and positioned inside the motor stator, the motor rotor further comprising a rotating shaft, both ends of the rotating shaft being positioned at the front bracket and the rear bracket respectively;

[0021] The motor rotor rotates relative to the motor stator with the rotation axis as the center.

[0022] In the present invention, due to the use of the above-mentioned motor stator, the number and length of the stator winding coils in the motor core can be increased as much as possible, while changing the thickness of the motor; while increasing the motor power, the motor size is kept constant, facilitating miniaturization. In addition, since the two ends of the rotating shaft of the motor rotor are mounted on the front bracket and the rear bracket, that is, the motor rotor is located between the front bracket, the stator core, and the rear bracket, and the rotating shaft is fixed to the front bracket and the rear bracket, on the one hand, the compactness of the motor structure can be ensured, and the space utilization efficiency can be maximized. On the other hand, the distance between the front bracket and the rear bracket can be designed and adjusted according to the length of the rotating shaft, so that the distance is designed and adjusted to just fix the two ends of the rotating shaft, thereby minimizing the thickness of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the motor stator of the present invention;

[0024] Figure 2Schematic diagram of the structure of the stator core of the present invention;

[0025] Figure 3 This is a schematic diagram of the stator structure of a motor without stator windings according to the present invention;

[0026] Figure 4 yes Figure 3 A top view of

[0027] Figure 5 yes Figure 3 lateral axial view;

[0028] Figure 6a It is a schematic diagram of the motor structure of the present invention;

[0029] Figure 6b This is a schematic diagram of the front bracket installation of the motor of the present invention;

[0030] Figure 7 This is a schematic structural diagram of the motor of the present invention from another angle;

[0031] Figure 8 is a cross-sectional axial view of the motor of the present invention;

[0032] Figure 9 1 is a schematic diagram of the rotor structure of the motor of the present invention;

[0033] Figure 10 This is a side axial view of the motor of the present invention when the motor rotor is not installed;

[0034] Figure 11 This is a top axial cross-sectional view of the motor of the present invention when the motor rotor is not installed;

[0035] Figure 12 This is a side axial view of the motor after the motor rotor is installed according to the present invention. DETAILED DESCRIPTION

[0036] The present invention will be further described and explained below in conjunction with specific embodiments and accompanying drawings:

[0037] Please refer to Figures 1 to 5 The present invention discloses a motor stator 100 , which includes a stator core 10 and a stator winding 11 . The stator core 10 is an iron-containing magnetic conductor, and the stator winding 11 is wound around the stator core 10 .

[0038] Specifically, the stator core 10 includes four side edges 101 , four transition sections 102 and at least four stator teeth 103 .

[0039] The entire stator core 10 is a platform, with the four sides 101 located in the same plane. One side 101 is perpendicular to another adjacent side 101, similarly forming the four sides of a square. Each transition section 102 is used to connect two adjacent side sections 101. The transition section 102 is arc-shaped, with the centers of the four transition sections 102 overlapping and located inside the stator core 10. In other words, the transition sections 102 can be similarly viewed as the four vertices of a square. The arc-shaped transition sections 102 can be adapted to installation locations that are circular holes, while the sides 101, which are viewed as the four sides of a square, can be installed in square installation locations. This structure can adapt to more installation methods.

[0040] There are at least four stator teeth 103, each of which extends from the side 101 toward the inside of the stator core 10, and includes a distal end 104 away from the side 101. When there are four stator teeth 103, the four distal ends 104 enclose a first accommodating portion 105. When there are more than four stator teeth 103, for example, there are 8 stator teeth 103, there are also 8 distal ends 104, and the 8 distal ends 104 also enclose a first accommodating portion 105. The "encirclement" described in the present invention refers to a line connecting the extension trajectories of the four distal ends 104, and the area inside the line is the enclosed area. The stator teeth 103 serve as a support structure for winding the stator winding 11 and can fix the stator winding 11. When there are four stator teeth 103, two adjacent stator teeth 103, two adjacent side edges 101, and the transition section 102 connecting the two adjacent side edges 101 together form a second accommodating portion 106. There are four second accommodating portions 106. The first accommodating portion 105 is electrically connected to the second accommodating portions 106. The stator winding 11 is wound around each stator tooth 103, passing through and being accommodated in two adjacent second accommodating portions 106.

[0041] In the present invention, the area enclosed by two adjacent stator teeth 103, two adjacent side edges 101, and a transition section 102 connecting the two adjacent side edges 101 is an irregular area. As for the stator core 10, in addition to accommodating the motor rotor 400, it is also necessary to accommodate the stator winding 11 and to conveniently fix the stator winding 11. In this way, the second accommodating portion 106 formed by the irregular area can obtain the maximum accommodating space in the square-shaped stator core 10 as much as possible, thereby increasing the number and length of the coils of the stator winding 11, so that the motor can obtain greater torque without increasing its own size.

[0042] In the present invention, when there are multiple stator teeth 103, for example, 8, each stator tooth 103 is also extended from the side 101, wherein two stator teeth 103 extend from the same side 101, and the two adjacent stator teeth 103 on the same side 101 are surrounded by the side 101 to form a second accommodating portion 106; two adjacent stator teeth 103 on different sides 101, the two adjacent side edges 101, and the transition section 102 connecting the two adjacent side edges 101 are together surrounded to form a second accommodating portion 106. As the number of selected stator teeth 103 increases, the number of second accommodating portions 106 also increases. At the same time, the number of stator windings 11 wound on the stator teeth 103 also increases, and the space between two adjacent stator windings 11 decreases. Equivalently, it can be regarded as that the number of coils of the stator winding 11 of the entire motor 100 increases, and the coil length also increases, so that the motor obtains greater torque without expanding its own size.

[0043] On the other hand, the stator core 10 with such a structure will not increase the number of coils of the stator winding 11, thereby causing the far end 104 of the stator winding 11 to be farther away from the center line of the rotor, which will reduce the magnetic field effect and lead to the technical problem of reduced power conversion efficiency. It will also not increase the thickness of the motor, and is convenient for miniaturization. Such a structure refers to the four sides of the square formed by the side 101, and the arc-shaped transition section 102 serves as the square vertex structure.

[0044] In the present invention, the first accommodating portion 105 and the second accommodating portion 106 are connected. When the stator winding 11 in the second accommodating portion 106 and the motor rotor 400 accommodated in the first accommodating portion 105 are spatially connected, on the one hand, the electromagnetic force can be improved, and on the other hand, the air flow and heat dissipation are facilitated.

[0045] In the motor stator 100 of the present invention, the stator tooth portion 103 includes an extension end 103 a and a tooth end 103 b .

[0046] The extending end 103 a extends from the middle portion of the side 101 .

[0047] That is to say, the stator teeth 103 are located in the middle of the side 101. After the stator winding 11 is wound on the stator teeth 103, it can be ensured that the stator winding 11 is located near each side 101 and in the middle of each side 101. From the overall perspective, the four stator windings 11 are arranged on the four sides of the square with a regular distribution. The magnetic field is stable during operation, and leakage magnetic flux can be reduced, thereby improving the efficiency of power conversion.

[0048] The tooth end 103b extends from the extension end 103a toward the center of the stator core 10 and forms first stop portions 103c on both sides of the extension end 103a. A gap b is defined between the first stop portion 103c of one tooth end 103b and the first stop portion 103c of another adjacent tooth end 103b. The gap b allows electrical communication between the first accommodation portion 105 and the second accommodation portion 106.

[0049] In the present invention, the first stopping portion 103c, on the one hand, serves to stop and fix the stator winding 11, and on the other hand, can divide the stator core 10 into second accommodating portions 106 located near the four vertices of the square. The space near the vertices of the square is utilized, and the structure is relatively compact, which is conducive to the miniaturization of the motor. In addition, a larger space is formed near the vertices of the square to accommodate more stator windings 11.

[0050] Furthermore, the surface of the tooth end 103 b away from the extension end 103 a is an arc-shaped first arc surface a, the first arc surfaces a of the four tooth ends 103 b are the circumference of the same circle, and the line connecting the four first arc surfaces a forms the first accommodation portion 105 .

[0051] In the present invention, the tooth end 103b for fixing the stator winding 11 is set to a structure having a first arc surface a. On the one hand, the first arc surface a can be used to stop the stator winding 11. On the other hand, the area enclosed by multiple first arc surfaces a can naturally form a first accommodating portion 105 for accommodating the motor rotor 400. The design is ingenious and can improve the utilization rate of the internal space without adopting other structures to specially set up the first accommodating portion 105 to accommodate the motor rotor 400.

[0052] In the present invention, the stator core 10 is manufactured by integral molding. On the one hand, the integral molding can meet the manufacturing requirements of the stator core 10 with an irregular structure. On the other hand, it can improve the structural strength of the stator core 10 itself, improve the magnetic conductivity, and prevent magnetic leakage.

[0053] In the present invention, the ratio between the outer diameter of the stator core 10 and the thickness of the stator core 10 is called the aspect ratio, wherein the aspect ratio ranges from 4:1 to 18:1, with 8:1 being preferred. Specifically, when the aspect ratio of the stator core 10 is selected to be between 4:1 and 18:1, on the one hand, the thickness of the motor stator 100 can be reduced as much as possible to ensure the flatness of the entire motor. On the other hand, as the aspect ratio increases, the number of stator teeth 103 can also be increased, thereby reducing the thickness of the motor while ensuring that the number and length of coils in the stator winding 11 are not reduced. For example, when there are 8 stator teeth 103, the aspect ratio of the stator core 10 can be selected to be 16:1 or 18:1.

[0054] like Figure 3 In the present invention, the motor stator 100 further includes: an upper plate 12 and a lower plate 13 .

[0055] The upper plate 12 is fixed to the stator core 10 , and a second stopper 121 and a third stopper 122 are provided on the upper plate 12 relative to the stator winding 11 . The second stopper 121 and the third stopper 122 are used to clamp the stator winding 11 .

[0056] The lower plate 13 is fixed to the stator core 10 and is provided with a fourth stopper 131 relative to the stator winding 11 . The fourth stopper 131 is used to position the stator winding 11 . The upper plate 12 and the lower plate 13 clamp the stator core 10 .

[0057] In the present invention, the second stopping portion 121 , the third stopping portion 122 and the fourth stopping portion 131 provided on the upper plate 12 and the lower plate 13 can more effectively fix the stator winding 11 and prevent the stator winding 11 from deflecting.

[0058] In addition, the wire ends at both ends of the stator winding 11 can be extended through the upper plate 12 or the lower plate 13 to facilitate connection to an external power supply. Such a structure can ensure that the connecting wires are neat, compact, and not messy, which is conducive to reducing the size of the motor.

[0059] like Figures 6a to 8 Another object of the present invention is to provide a flat high-power motor 900, which first includes the above-mentioned motor stator 100. The motor 900 also includes: a front bracket 200, a rear bracket 300, and a motor rotor 400. The motor rotor 400 has a rotating shaft 41.

[0060] Among them, the front bracket 200 is installed on the motor stator 100; the rear bracket 300 is installed on the motor stator 100, and the front bracket 200 and the rear bracket 300 clamp the motor stator 100; the motor rotor 400 passes through and is positioned on the motor stator 100, and the two ends of the rotating shaft 41 are respectively positioned on the front bracket 200 and the rear bracket 300; the motor rotor 400 rotates relative to the motor stator 100 with the rotating shaft 41 as the center.

[0061] In the present invention, the motor 900 as a whole includes a motor stator 100 and a front bracket 200 and a rear bracket 300 that clamp the motor stator 100 and are fixed on the motor stator 100, and the motor rotor 400 is fixed on the front bracket 200 and the rear bracket 300 through the two ends of the rotating shaft 41. The entire structure is relatively compact and neat.

[0062] Because the motor 900 of the present invention utilizes the aforementioned motor stator 100, it can accommodate more stator windings 11 within the second accommodating portion 106, thereby increasing the power of the motor 900. Furthermore, the front bracket 200 and the rear bracket 300 are generally at or near the same height as the stator windings 11. Therefore, even with the front bracket 200 and the rear bracket 300 securing the motor rotor 400, the thickness of the motor 900 itself remains unchanged. Therefore, the motor 900 of the present invention maintains a flat and compact design while increasing its power. Among them, when the aspect ratio of the stator core 10 is 4:1, according to the power requirement of the motor 900, after the front bracket 200, the rear bracket 300 and the stator winding 11 are installed, the distance between the outer surfaces of the front bracket 200 and the rear bracket 300 of the motor 900 is less than 75 mm; when a stator core 10 with a larger aspect ratio is selected, the distance between the outer surfaces of the front bracket 200 and the rear bracket 300 of the motor 900 will be further reduced. Among them, when the aspect ratio of the stator core 10 is 18:1, the distance between the outer surfaces of the front bracket 200 and the rear bracket 300 of the motor 900 is 35 mm, thereby achieving flattening. Compared with the existing motors of the same power, the thickness is sharply reduced.

[0063] In addition, since both ends of the rotating shaft 41 of the motor rotor 400 are installed on the front bracket 200 and the rear bracket 300, that is, the motor rotor 400 is located between the front bracket 200, the motor stator 100 and the rear bracket 300, and the rotating shaft 41 is fixed on the front bracket 200 and the rear bracket 300, on the one hand, it can ensure the compactness of the motor structure and maximize the utilization efficiency of space. On the other hand, the distance between the front bracket 200 and the rear bracket 300 can be designed and adjusted according to the length of the rotating shaft 41, so that the distance design is adjusted to just fix the two ends of the rotating shaft 41, so that the thickness of the motor 900 can be reduced as much as possible.

[0064] In the present invention, the front bracket 200 includes a first table 21 , four first extension arms 22 , a first inclined section 23 and a first fixing portion 24 .

[0065] A first positioning hole 210 is provided at the center of the first table 21, which is located above the motor stator 100. In the present invention, the first table 21 is a flat surface. This not only shields the end of the motor rotor 400 but also allows for mounting structures such as fixing holes to be provided on the flat first table 21, thereby saving space. Compared to structures such as protruding irregular surfaces, this helps reduce the overall thickness of the motor 900.

[0066] In which, the first extension arm 22 extends outward from the first table 21, and any two adjacent first extension arms 22 are perpendicular to each other; the first inclined section 23 extends outward from the first extension arm 22 and is inclined toward the motor stator 100; the first fixing portion 24 extends outward from the first inclined section 23 and is fixed to the transition section 102.

[0067] In the present invention, the front bracket 200 is fixed to the motor stator 100 by extending four first extension arms 22 perpendicular to each other, and the fixed position is exactly the transition section 102 at the four vertices of a square. This structure can improve the fixing strength of the front bracket 200 and the motor stator 100, and at the same time ensure that the supporting force of the front bracket 200 is more uniform to prevent displacement.

[0068] like Figure 6b In the present invention, the front bracket 200 also includes a mounting ear 25 for mounting and fixing the motor 900; there are multiple mounting ears 25, each of which extends from the first fixing portion 24 toward the outside of the motor 900, and the mounting ear 25 protrudes from the motor stator 100.

[0069] During installation, after the motor 900 is placed in the square or circular mounting hole X to be installed, the front bracket 200 protrudes from the mounting hole X, and the mounting ear 25 is located above the surface of the wall or structural member Y where the mounting hole X is located. The motor 900 can be conveniently fixed in the mounting hole X by passing through the screw or fixing rod of the mounting ear 25.

[0070] Likewise, the rear bracket 300 includes a second platform 31 , four second extension arms 32 , a second inclined section 33 and a second fixing portion 34 .

[0071] A second positioning hole 310 is centrally located on the second table 31, which is positioned below the motor stator 100. The second table 31 functions similarly to the first table 21. Both the first and second tables 21 and 31 are flat, facilitating the flattening of the motor 900. The distance between the first and second tables 21 and 31 is adapted to the length of the rotating shaft 41, thereby reducing the thickness of the motor 900.

[0072] In which, the second extension arm 32 extends outward from the second table 31, and any two adjacent second extension arms 32 are perpendicular to each other; the second inclined section 33 extends outward from the second extension arm 32 and is inclined toward the motor stator 100; the second fixing portion 34 extends outward from the second inclined section 33 and is fixed to the transition section 102.

[0073] In the present invention, the rear bracket 300 has a similar structure to the front bracket 200. This structure can improve the fixing strength of the rear bracket 300 and the motor stator 100, and at the same time ensure that the supporting force of the rear bracket 300 is more uniform to prevent deviation.

[0074] In the present invention, both ends of the rotating shaft 41 are positioned at the first positioning hole 210 and the second positioning hole 310 respectively. The first positioning hole 210 and the second positioning hole 310 are opposite to each other. The rotating shaft 41 is perpendicular to the plane where the motor stator 100 is located.

[0075] The motor rotor 400 is vertically fixed on the front bracket 200 and the rear bracket 300 , and the fixing strength of the front bracket 200 and the rear bracket 300 ensures the stability and consistency of the motor rotor 400 during rotation, and ensures the uniform distribution of the magnetic field.

[0076] like Figure 9 More specifically, in the present invention, the motor rotor 400 further includes: a plurality of rotor teeth 42 and a rotor winding 43 .

[0077] A plurality of rotor teeth 42 are circumferentially distributed around the outer periphery of the rotating shaft 41 at intervals; the rotor winding 43 is wound around each rotor tooth 42 ; and the rotor teeth 42 are located in the first accommodation portion 105 .

[0078] The rotor teeth 42 distributed at intervals on the circumference can make the rotor winding 43 wound thereon evenly distributed within 360 degrees of the circumference, thereby ensuring the stability of the motor rotor 400 during rotation.

[0079] The transition section 102 is provided with a mounting hole c, and a line connecting the mounting holes c of two opposite transition sections 102 passes through the gap b; the front bracket 200 and the rear bracket 300 are fixed through the mounting holes c.

[0080] That is, the first extension arm 22 extending from the front bracket 200 and the second extension arm 32 extending from the rear bracket 300 correspond to a gap b in the vertical direction, and the gap b is used to pass through the first accommodating portion 105 and the second accommodating portion 106. This structure provides a larger space between the first extension arm 22 and the second extension arm 32 for air flow and heat dissipation. Moreover, the gap b is located between two adjacent stator windings 11, which can ensure the uniformity of the magnetic field.

[0081] The front bracket 200 and the rear bracket 300 are fixed on the motor stator 100 at the same position, that is, the position of the mounting hole c. They can be fixed using common bolts. The fixing method is relatively simple and the disassembly is also simple. In addition, the front bracket 200, the rear bracket 300 and the motor stator 100 are fixed at the same position, which can ensure absolute stability among the three and make the fixation more firm.

[0082] In the present invention, the motor 900 further includes a cooling air disk 500 , which is located outside the rear bracket 300 , connected to the rotating shaft 41 , and rotates with the rotating shaft 41 to achieve cooling.

[0083] Among them, when the cooling air disk 500 rotates, the air in the space between the front bracket 200 and the rear bracket 300 is conducted and flows, and the gap b in the second accommodating portion 106 conducts the air between the front bracket 200 and the rear bracket 300 in the vertical direction, which has a good heat dissipation effect and is beneficial to the heat dissipation of the motor rotor 400.

[0084] See Figure 9 , Figures 10 to 12 The present invention also discloses another flat high-power motor 800 , which includes the above-mentioned motor stator 100 , front bracket 200 , rear bracket 300 , and motor rotor 400 , and also includes a carbon brush 600 .

[0085] The motor rotor 400 further includes a commutator 44 . The commutator 44 is positioned on the rotating shaft 41 , and the commutator 44 rotates along with the rotating shaft 41 .

[0086] The carbon brush 600 is fixed to the surface of the rear bracket 300 facing the motor stator 100 , and there are a plurality of carbon brushes 600 .

[0087] One way is that there are four carbon brushes 600, any two adjacent carbon brushes 600 are perpendicular to each other, one end of each carbon brush 600 is electrically connected to the commutator 44, and the other end of each carbon brush 600 extends out of the rear bracket 300; each carbon brush 600 is relative to the second extension arm 32, thereby increasing the length of the carbon brush 600.

[0088] In the present invention, the stator winding 11 is located between two adjacent second extension arms 32, that is, in the gap b of the rear bracket 300, which can maximize the number of coils of the stator winding 11; in addition, from the external structure of the entire motor 800, the entire motor 800 is similar to a square structure, the side edges 101 of the stator core 10 are the four sides of the square, the transition section 102 of the stator core 10 is the four vertices of the square, and the second extension arm 32 is equivalent to the connecting position of the diagonal of the square. The carbon brush 600 is arranged relative to the second extension arm 32, so that the length of the carbon brush 600 has the longest length in the square space, which can reduce the problem of motor failure due to wear of the carbon brush 600.

[0089] participate Figure 7 and Figure 12 In the present invention, a sheet gasket 61 is further provided between the carbon brush 600 and the rear bracket 300. The sheet gasket 61 covers the area between the carbon brush 600 and the second extension arm 32 and the area between the carbon brush 600 and the second inclined section 33 to insulate the carbon brush 600 from the rear bracket 300.

[0090] Among them, the sheet gasket 61 is preferably an L-shaped structure, one end of the sheet gasket 61 is against the second inclined section 33, and the other end of the sheet gasket 61 is opposite to the second extension arm 32, so as to achieve insulation of all positions that may contact the rear bracket 300.

[0091] 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 the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A motor stator, comprising a stator core and a stator winding, characterized in that: The stator core is an iron-containing magnetic conductor, and the stator core includes: Four side edges, wherein the four side edges are located in the same plane, and one side edge is perpendicular to another adjacent side edge; Four transition sections, each transition section is used to connect two adjacent side edges, the transition section is arc-shaped, and the centers of the four transition sections overlap and are located inside the stator core; at least four stator teeth, each of the stator teeth extending from the side toward the interior of the stator core, the stator teeth including a distal end away from the side, the distal ends collectively forming a first accommodating portion; Wherein, two adjacent stator teeth and the side, or two adjacent stator teeth and the side and the transition section enclose a second accommodating portion, and there are multiple second accommodating portions; the first accommodating portion is connected to the second accommodating portion; The stator winding is wound around each of the stator teeth, and the stator winding passes through and is accommodated in two adjacent second accommodation portions.

2. The motor stator according to claim 1, characterized in that: There are four stator teeth, and two adjacent stator teeth, two adjacent side edges, and a transition section connecting the two adjacent side edges together form the second accommodating portion. There are four second accommodating portions.

3. The motor stator according to claim 2, characterized in that: The stator teeth include: an extension end, the extension end extending from the middle portion of the side edge; a tooth end, the tooth end extending from the extension end toward the center of the stator core, and forming a first stop portion on both sides of the extension end; A gap is provided between the first stop portion of one tooth end and the first stop portion of another adjacent tooth end, and the gap enables the first accommodation portion and the second accommodation portion to communicate with each other.

4. The motor stator according to claim 1, characterized in that: The motor stator further comprises: an upper plate, the upper plate being fixed to the stator core, the upper plate being provided with a second stopper and a third stopper at a position relative to the stator winding, the second stopper and the third stopper being used to clamp and hold the stator winding; a lower plate, the lower plate being fixed to the stator core, the lower plate being provided with a fourth stopper relative to the stator winding, the fourth stopper being used to position the stator winding; The upper plate and the lower plate clamp the stator core.

5. A flat high-power motor, characterized in that: The motor comprises: Motor stator; A front bracket, the front bracket being mounted on the motor stator; a rear bracket mounted on the motor stator; a motor rotor, the motor rotor passing through and positioned on the motor stator, the motor rotor further comprising a rotating shaft, both ends of the rotating shaft being positioned on the front bracket and the rear bracket respectively; The front bracket and the rear bracket clamp the motor stator; the motor rotor rotates relative to the motor stator with the rotation axis as the center; the motor stator includes a stator core and a stator winding, the stator core is an iron-containing magnetic conductor, and the stator core includes: Four side edges, wherein the four side edges are located in the same plane, and one side edge is perpendicular to another adjacent side edge; Four transition sections, each transition section is used to connect two adjacent side edges, the transition section is arc-shaped, and the centers of the four transition sections overlap and are located inside the stator core; at least four stator teeth, each of the stator teeth extending from the side toward the interior of the stator core, the stator teeth including a distal end away from the side, the distal ends collectively forming a first accommodating portion; Two adjacent stator teeth and the side, or two adjacent stator teeth and the side and the transition section enclose a second accommodating portion; there are a plurality of second accommodating portions; the first accommodating portion is electrically connected to the second accommodating portion; The stator winding is wound around each of the stator teeth, and the stator winding passes through and is accommodated in two adjacent second accommodation portions.

6. The flat high-power motor according to claim 5, characterized in that: There are four stator teeth, and two adjacent stator teeth, two adjacent side edges, and a transition section connecting the two adjacent side edges together form the second accommodating portion. There are four second accommodating portions.

7. The flat high-power motor according to claim 6, characterized in that: The front bracket includes: a first table top, wherein a first positioning hole is provided at the center of the first table top, and the first table top is located above the motor stator; Four first extension arms, each of the first extension arms extending outward from the first platform, with any two adjacent first extension arms being perpendicular to each other; a first inclined section, the first inclined section extending outward from the first extension arm and inclined toward the motor stator; a first fixing portion, the first fixing portion extending outward from the first inclined section and fixed to the transition section; The rear bracket comprises: a second table top, wherein a second positioning hole is provided at the center of the second table top, and the second table top is located below the motor stator; four second extension arms, each of the second extension arms extending outward from the second table surface, with any two adjacent second extension arms being perpendicular to each other; a second inclined section, the second inclined section extending outwardly from the second extension arm and inclined toward the motor stator; A second fixing portion extends outward from the second inclined section and is fixed to the transition section.

8. The flat high-power motor according to claim 7, characterized in that: The front bracket also includes a mounting ear for mounting and fixing the motor; there are multiple mounting ears, each of which extends from the first fixing portion toward the outside of the motor, and each mounting ear protrudes from the motor stator.

9. The flat high-power motor according to claim 8, characterized in that: Both ends of the rotating shaft are positioned at the first positioning hole and the second positioning hole respectively. The first positioning hole and the second positioning hole are opposite to each other. The rotating shaft is perpendicular to the plane where the motor stator is located.

10. The flat high-power motor according to claim 5, characterized in that: The ratio of the outer diameter of the stator core to the thickness of the stator core is in a range of 4:1 to 18:1, so that the distance between the outer surfaces of the front bracket and the rear bracket of the motor is less than 75 mm.

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