Motor

Abstract

The utility model discloses a motor, which comprises a stator and a rotor capable of rotating relative to the stator, the stator comprises a stator iron core and a winding wound on the stator iron core, and the rotor is arranged in the stator iron core. The rotor comprises a motor shaft, a rotor iron core fixedly sleeved on the periphery of the motor shaft and a plurality of magnetic steels embedded in the rotor iron core, an air gap is arranged between the rotor iron core and the stator iron core, the plurality of magnetic steels are distributed at intervals along the circumferential direction of the rotor iron core, and the magnetic steels are arranged in the radial direction or the tangential direction. The rotor iron core is an amorphous alloy rotor iron core, the rotor iron core is provided with a plurality of iron core through grooves penetrating through the two ends of the rotor iron core, the plurality of iron core through grooves are distributed at intervals along the circumferential direction of the rotor iron core, and each iron core through groove corresponds to one magnetic steel and is located between the motor shaft and the corresponding magnetic steel. According to the utility model, the magnetic leakage of the magnetic steel in the Y direction can be reduced, and the performance and efficiency of the motor are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to drive technical field, concretely relates to a motor. BACKGROUND

[0002] The existing motor, for example, the middle motor, generally includes the stator and the rotor that can rotate relative to the stator, the stator includes the stator core and the winding that is wound in the stator core, the rotor is arranged in the stator core, the rotor includes the motor shaft, the rotor core that is fixedly sleeved in the outer periphery of the motor shaft and the several magnetic steel that is embedded in the rotor core, the rotor core and the stator core have air gap, and several magnetic steels are spaced apart along the circumference of the rotor core, and the magnetic steel is radially arranged or tangentially arranged.The rotor core of this kind of structure is generally silicon steel sheet rotor core, and the silicon steel sheet material has low permeability, cannot make the rotor magnetic circuit on the X direction of magnetic steel (the X direction of magnetic steel is the length direction of magnetic steel) premature saturation, thereby reducing the magnetic force line through the Y direction of magnetic steel (the Y direction of magnetic steel is the width direction of magnetic steel), and the rotor core is not provided with through slot at the position between magnetic steel and motor shaft, thereby further reducing the magnetic force line through the Y direction of magnetic steel (the Y direction of magnetic steel is the width direction of magnetic steel), resulting in that the magnetic steel Y direction leakage is more serious, and the performance and efficiency of motor are reduced. SUMMARY

[0003] In order to overcome the deficiency of prior art, the utility model provides a kind of motor, which can reduce the leakage of magnetic steel in Y direction, improve the performance and efficiency of motor.

[0004] The technical scheme adopted by the utility model to solve its technical problems is:

[0005] A kind of motor, including stator and the rotor that can rotate relative to stator, the stator includes the stator core and the winding that is wound in the stator core, the rotor is arranged in the stator core, the rotor includes the motor shaft, the rotor core that is fixedly sleeved in the outer periphery of the motor shaft and the several magnetic steel that is embedded in the rotor core, the rotor core and the stator core have air gap, and several magnetic steels are spaced apart along the circumference of the rotor core, and the magnetic steel is radially arranged or tangentially arranged, the rotor core is amorphous alloy rotor core, the rotor core is provided with the several core through slots that pass through the both ends of rotor core, and several core through slots are spaced apart along the circumference of the rotor core, and each core through slot corresponds a magnetic steel and each core through slot is located between the motor shaft and corresponding magnetic steel respectively.

[0006] As preferred technical scheme, the outer circumferential surface of the rotor core is non-cylindrical surface, and the outer circumferential surface of the rotor core includes a plurality of first surfaces arranged along the circumference, and two adjacent first surfaces are connected by a second surface.

[0007] As a preferred technical scheme, the magnetic steels are arranged radially; each magnetic steel corresponds to a first surface, the first surface is a convex arc surface, and the second surface is a concave arc surface.

[0008] As a preferred technical scheme, the magnetic steels are arranged radially; the rotor core is provided with a plurality of installation cavities, two ends of each installation cavity extend to two ends of the rotor core, the installation cavities are distributed along a circumferential direction of the rotor core at intervals, the installation cavities are matched with the magnetic steels, each magnetic steel corresponds to an installation cavity, each magnetic steel is embedded in the corresponding installation cavity, and each installation cavity corresponds to a core through slot.

[0009] As a preferred technical scheme, two first grooves are arranged on inner walls of the two ends of the installation cavity respectively, two ends of the first grooves extend to the two ends of the rotor core respectively, two second grooves are arranged on an inner wall of a side of the installation cavity close to the motor shaft at intervals, the two second grooves are close to the two ends of the installation cavity respectively, and two ends of the second grooves extend to the two ends of the rotor core respectively.

[0010] As a preferred technical scheme, the magnetic steels are arranged tangentially; each magnetic steel corresponds to a second surface, the first surface is a convex arc surface, and the second surface is a straight surface.

[0011] As a preferred technical scheme, the magnetic steels are arranged tangentially; the rotor core is provided with a plurality of installation cavities, two ends of each installation cavity extend to two ends of the rotor core, the installation cavities are distributed along a circumferential direction of the rotor core at intervals, the installation cavities are matched with the magnetic steels, each magnetic steel corresponds to an installation cavity, each magnetic steel is embedded in the corresponding installation cavity, each installation cavity corresponds to a core through slot, and the installation cavity and the corresponding core through slot are communicated through a connecting groove, two ends of the connecting groove extend to the two ends of the rotor core respectively.

[0012] As a preferred technical scheme, the rotor core is provided with an intermediate through slot between two adjacent installation cavities, and the intermediate through slot is close to one end of the installation cavity close to the motor shaft.

[0013] As a preferred technical scheme, the motor shaft is provided with two balance blocks outside a periphery of the motor shaft, and the rotor core is located between the two balance blocks.

[0014] As a preferred technical scheme, the stator core is a silicon steel sheet stator core or an amorphous alloy stator core; the stator core is an integrally formed structure or is formed by laminating a plurality of stator core sheets, and the rotor core is an integrally formed structure or is formed by laminating a plurality of rotor core sheets.

[0015] The rotor core of the utility model is non-crystal alloy rotor core, non-crystal alloy rotor core can make the rotor magnetic circuit of magnetic steel in X direction premature saturation, force more magnetic lines of force to pass along the Y direction of magnetic steel, and make these magnetic lines of force and stator magnetic lines of force act, and pass through the core through slot set between magnetic steel and motor shaft, can further make magnetic lines of force pass along the Y direction of magnetic steel, optimize the rotor magnetic circuit, reduce the magnetic leakage of magnetic steel in Y direction, improve the performance and efficiency of motor. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model is further explained below in combination with the drawings and examples.

[0017] Figure 1 It is the first angle structure schematic drawing of motor provided by the first embodiment of the utility model;

[0018] Figure 2 It is Figure 1 The second angle structure schematic drawing of motor shown in the figure;

[0019] Figure 3 It is Figure 1 The cross-sectional schematic view of motor shown in the figure;

[0020] Figure 4 It is Figure 1 The structure schematic drawing of motor shown in the figure removes the shell and end cover;

[0021] Figure 5 It is Figure 1 The overhead schematic view of the stator core and rotor of motor shown in the figure;

[0022] Figure 6 It is Figure 5 The structure schematic drawing of stator core shown in the figure;

[0023] Figure 7 It is Figure 5 The structure schematic drawing of rotor shown in the figure;

[0024] Figure 8 It is Figure 5 The overhead schematic view of magnetic steel of rotor shown in the figure;

[0025] Figure 9 It is the structure schematic drawing of motor shown in the figure removes the shell and end cover;

[0026] Figure 10 It is Figure 9 The structure schematic drawing of stator of motor shown in the figure removes the insulation frame;

[0027] Figure 11 It is Figure 9 The structure schematic drawing of rotor of motor shown in the figure;

[0028] Figure 12 is Figure 11 a top view of the rotor.

[0029] Reference signs:

[0030] 10, housing; 11, end cover; 12, housing through hole; 111, end cover through hole; 31, motor shaft; 311, first bearing; 312, second bearing;

[0031] 20, stator; 21, stator core; 21a, stator core sheet; 211, yoke portion; 212, stator tooth; 22, insulation frame; 23, winding;

[0032] 30, rotor; 31, motor shaft; 32, rotor core; 32a, rotor core sheet; 321, core through slot; 322, first recess; 323, second recess; 324, first surface; 3241, transition convex arc surface; 3242, transition concave arc surface; 325, second surface; 326, connecting recess; 327, intermediate through slot; 33, magnetic steel; 34, balance block;

[0033] 40, air gap. DETAILED DESCRIPTION

[0034] The concept, specific structure and technical effects of the present application will be described clearly and completely in combination with the embodiments and the drawings, so as to fully understand the purpose, features and effects of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application. In addition, all the coupling / connection relationships involved in the patent do not mean that the components are directly connected, but means that a better coupling structure can be formed by adding or reducing coupling auxiliary components according to the specific implementation situation. The various technical features in the present application can be interactively combined without mutual contradiction and conflict.

[0035] First embodiment

[0036] Please refer to Figures 1 to 7 The first embodiment of the present application provides a motor, which comprises a housing 10, a stator 20 and a rotor 30 capable of rotating relative to the stator 20.

[0037] One end of the housing 10 is open and the other end is closed. The open end of the housing 10 is provided with an end cover 11. The stator 20 is arranged in the housing 10, and the stator 20 comprises a stator core 21, a winding 23 arranged on the stator core 21, and an insulation frame 22 arranged between the stator core 21 and the winding 23 for insulating the stator core 21 and the winding 23.

[0038] In this embodiment, the stator core 21 is of an integral structure, which is convenient for manufacturing. It can be understood that the stator core 21 can also be formed by stacking a plurality of stator core pieces 21a.

[0039] The stator core 21 includes an annular yoke portion 211 and a plurality of stator teeth 212 extending radially inward from the yoke portion 211. The winding 23 is wound around the plurality of stator teeth 212.

[0040] The rotor 30 is arranged in the stator core 21, specifically in the space surrounded by the plurality of stator teeth 212. The rotor 30 includes a motor shaft 31, a rotor core 32 fixedly sleeved on the outer periphery of the motor shaft 31, and a plurality of rectangular magnetic steels 33 embedded in the rotor core 32.

[0041] The two ends of the motor shaft 31 protrude from the two ends of the stator core 21, and the two ends of the motor shaft 31 protrude from the shell through hole 12 of the closed end of the shell 10 and the end cover through hole 111 of the end cover 11. The two ends of the motor shaft 31 are rotatably connected to the shell 10 and the end cover 11 through the first bearing 311 and the second bearing 312, and the first bearing 311 and the second bearing 312 can provide rotational support for the motor shaft 31 and can ensure the stability of the rotation of the motor shaft 31.

[0042] Further, the outer periphery of the motor shaft 31 is sleeved with two balance blocks 34, and the rotor core 32 is located between the two balance blocks 34. The balance block 34 is a copper sleeve, and the balance block 34 is used for dynamic balance to eliminate the imbalance of the rotor 30 and reduce the vibration and noise of the motor.

[0043] The rotor core 32 is of an integral structure, which is convenient for manufacturing. It can be understood that the rotor core 32 can also be formed by stacking a plurality of rotor core pieces 32a. The rotor core 32 and the plurality of stator teeth 212 of the stator core 21 have an air gap 40 therebetween, and the existence of the air gap 40 enables the rotor 30 to rotate relative to the stator 20. The rotor core 32 is a non-crystalline alloy rotor core. The rotor core 32 is provided with a plurality of core through grooves 321 penetrating through both ends of the rotor core 32, and the plurality of core through grooves 321 are distributed in a spaced manner along the circumferential direction of the rotor core 32.

[0044] The plurality of magnetic steels 33 are distributed in a spaced manner along the circumferential direction of the rotor core 32. The magnetic steels 33 are arranged radially, i.e., the magnetic steels 33 are placed in a tangential direction parallel to the rotor core 32, and the magnetization direction is the radial direction of the rotor core 32. Each core through groove 321 corresponds to one magnetic steel 33, and each core through groove 321 is located between the motor shaft 31 and the corresponding magnetic steel 33. The shape of the core through groove 321 can be set according to actual conditions.

[0045] Amorphous alloy materials have characteristics such as high magnetic permeability and low coercivity. The rotor core 32 is made of amorphous alloy material, such as... Figure 8 As shown, this design allows the rotor 30 magnetic circuit in the X direction (i.e., the length direction of the magnet 33) of the magnet 33 to saturate prematurely, forcing more magnetic lines of force to pass along the Y direction (i.e., the width direction of the magnet 33). These magnetic lines of force interact with the magnetic lines of force in the stator 20. Furthermore, the provided core slot 321 further facilitates the passage of magnetic lines of force along the Y direction of the magnet 33, optimizing the rotor 30 magnetic circuit, reducing leakage flux in the Y direction, and improving the motor's performance and efficiency. It should be understood that since the magnetic lines of force fill the entire space and are not straight lines, passing through the X direction of the magnet 33 in this invention does not mean that the magnetic lines of force must always be parallel to the X direction of the magnet 33. Similarly, passing through the Y direction of the magnet 33 does not mean that the magnetic lines of force must always be parallel to the Y direction of the magnet 33.

[0046] In this embodiment, there are nine stator teeth 212 and six magnets 33, therefore the motor in this embodiment is a 9-slot, 6-pole motor. It is understood that the number of stator teeth 212 and magnets 33 can also be other.

[0047] The stator core 21 is a silicon steel sheet stator core or an amorphous alloy stator core. The use of amorphous alloy material in the stator core 21 can enhance the magnetic field strength and reduce hysteresis loss, thereby further improving the performance and efficiency of the motor.

[0048] Furthermore, the outer circumferential surface of the rotor core 32 is a non-cylindrical surface, comprising a plurality of first surfaces 324 spaced circumferentially, with adjacent first surfaces 324 connected by a second surface 325. Each magnet 33 corresponds to one first surface 324, which is a convex arc surface, while the second surface 325 is a concave arc surface. Therefore, the rotor core 32 has the largest radius at the position of the first surface 324 and the smallest radius at the position of the second surface 325. This allows for a larger air gap 40 thickness between adjacent magnets 33, increasing magnetic reluctance and allowing magnetic lines of force to pass along the Y-direction of the magnets 33. This further optimizes the magnetic circuit of the rotor 30, reduces magnetic leakage in the Y-direction of the magnets 33, and further improves the performance and efficiency of the motor.

[0049] In the embodiment, the rotor core 32 is provided with a plurality of installation cavities, the two ends of the installation cavities extend to the two ends of the rotor core 32 respectively, the plurality of installation cavities are distributed along the circumference of the rotor core 32 at intervals, the installation cavities are matched with the magnetic steel 33, each magnetic steel 33 corresponds to an installation cavity, and the magnetic steel 33 is embedded in the corresponding installation cavity. Each installation cavity corresponds to an iron core through slot 321, and the installation cavity and the corresponding iron core through slot 321 are not communicated, so that the magnetic force line passes along the Y direction of the magnetic steel 33. The number of installation cavities corresponds to the number of magnetic steels 33, which is also six.

[0050] Further, the inner walls of the two ends of the installation cavity are respectively provided with two first grooves 322, the two ends of the first grooves 322 extend to the two ends of the rotor core 32 respectively, the inner wall of the side of the installation cavity close to the motor shaft 31 is provided with two second grooves 323 at intervals, the two second grooves 323 are respectively close to the two ends of the installation cavity, and the two ends of the second grooves 323 extend to the two ends of the rotor core 32 respectively. The shapes of the first grooves 322 and the second grooves 323 can be set according to actual conditions. The first grooves 322 and the second grooves 323 are set, which can further make the magnetic force line pass along the Y direction of the magnetic steel 33, optimize the rotor 30 magnetic circuit, reduce the magnetic steel 33 leakage in the Y direction, and further improve the performance and efficiency of the motor.

[0051] Second embodiment

[0052] Please refer to Figures 9 to 12 The same parts of the embodiment and the first embodiment will not be described again, and the difference between the embodiment and the first embodiment is that the stator teeth 212 of the embodiment are twelve, and the magnetic steels 33 are fourteen, so that the motor of the embodiment is a 12-slot 14-pole motor.

[0053] The magnetic steels 33 are tangentially arranged, that is, the magnetic steels 33 are placed along the radial direction of the rotor core 32, and the magnetizing direction is the tangent direction of the rotor core 32. Each magnetic steel 33 corresponds to a second surface 324, the first surface 324 is a convex arc surface, the second surface 325 is a straight surface, the first surface 324 and the adjacent second surface 325 are connected through the transition convex arc surface 3241 and the transition concave arc surface 3242. Through the structure, the rotor core 32 has the maximum radius at the position of the first surface 324, and the rotor core 32 has the minimum radius at the position of the second surface 325, so that the thickness of the air gap 40 corresponding to the region of the magnetic steel 33 is larger, the magnetic resistance is increased, the magnetic force line can pass along the Y direction of the magnetic steel 33, the rotor 30 magnetic circuit is optimized, the magnetic steel 33 leakage in the Y direction is reduced, and the performance and efficiency of the motor are further improved.

[0054] A plurality of installation cavities are arranged in the rotor core 32, and the two ends of the installation cavities extend to the two ends of the rotor core 32 respectively, the installation cavities are distributed along the circumference of the rotor core 32 at intervals, the installation cavities are matched with the magnetic steel 33, each magnetic steel 33 corresponds to an installation cavity, the magnetic steel 33 is embedded in the corresponding installation cavity, each installation cavity corresponds to an iron core through slot 321, and the installation cavity and the corresponding iron core through slot 321 are communicated through a connecting groove 326. The two ends of the connecting groove 326 extend to the two ends of the rotor core 32 respectively. The number of the installation cavities corresponds to the number of the magnetic steel 33, and the number of the installation cavities is also fourteen. The shape of the connecting groove 326 can be set according to actual conditions. The connecting groove 326 is arranged, so that the magnetic force lines can further pass along the Y direction of the magnetic steel 33, the magnetic circuit of the rotor 30 is optimized, the magnetic leakage of the magnetic steel 33 in the Y direction is reduced, and the performance and efficiency of the motor are further improved.

[0055] The intermediate through slot 327 is arranged in the rotor core 32 between the two adjacent installation cavities and penetrates the two ends of the rotor core 32, and the intermediate through slot 327 is close to the end of the installation cavity close to the motor shaft 31. The shape of the intermediate through slot 327 can be set according to actual conditions. The intermediate through slot 327 is arranged, so that the magnetic force lines can further pass along the Y direction of the magnetic steel 33, the magnetic circuit of the rotor 30 is optimized, the magnetic leakage of the magnetic steel 33 in the Y direction is reduced, and the performance and efficiency of the motor are further improved.

[0056] The above is a specific description of the preferred embodiment of the utility model, but the utility model is not limited to the described embodiment, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the utility model, and these equivalent modifications or replacements are all included in the range defined by the claims of the present application.

Claims

1. An electric machine comprising a stator and a rotor capable of rotating relative to the stator, the stator comprising a stator core and a winding wound on the stator core, the rotor being arranged in the stator core, the rotor comprising a rotor shaft, a rotor core fixedly sleeved on the outer periphery of the rotor shaft, and a plurality of magnetic steels embedded in the rotor core, the rotor core and the stator core having an air gap therebetween, the plurality of magnetic steels being spaced apart along the circumferential direction of the rotor core, the magnetic steels being arranged radially or tangentially, characterized in that, The rotor core is an amorphous alloy rotor core, and the rotor core is provided with a plurality of core through grooves penetrating through both ends of the rotor core, the plurality of core through grooves are distributed at intervals along the circumference of the rotor core, each core through groove corresponds to a magnetic steel, and each core through groove is located between the motor shaft and the corresponding magnetic steel.

2. The electric machine of claim 1, wherein, The outer circumferential surface of the rotor core is a non-cylindrical surface, and the outer circumferential surface of the rotor core comprises a plurality of first surfaces arranged at intervals along the circumference, and two adjacent first surfaces are connected by a second surface.

3. The electric machine of claim 2, wherein, The magnetic steels are arranged radially, each magnetic steel corresponds to a first surface, the first surface is a convex arc surface, and the second surface is a concave arc surface.

4. The electric machine of claim 1, wherein, The rotor core is provided with a plurality of installation cavities, two ends of the installation cavities respectively extend to both ends of the rotor core, the plurality of installation cavities are distributed at intervals along the circumference of the rotor core, the installation cavities are matched with the magnetic steels, each magnetic steel corresponds to an installation cavity, the magnetic steels are embedded in the corresponding installation cavities, each installation cavity corresponds to a core through groove, and the installation cavity and the corresponding core through groove are not communicated.

5. The electric machine of claim 4, wherein, Two first grooves are arranged on the inner walls of the two ends of the installation cavity respectively, the two ends of the first grooves respectively extend to both ends of the rotor core, a second groove is arranged on the inner wall of the side of the installation cavity close to the motor shaft at intervals, the second groove is close to the two ends of the installation cavity respectively, and the two ends of the second groove respectively extend to both ends of the rotor core.

6. The electric machine of claim 2, wherein, The magnetic steels are arranged tangentially, each magnetic steel corresponds to a second surface, the first surface is a convex arc surface, and the second surface is a straight surface.

7. The electric machine of claim 1, wherein, The rotor core is provided with a plurality of installation cavities, two ends of the installation cavities respectively extend to both ends of the rotor core, the plurality of installation cavities are distributed at intervals along the circumference of the rotor core, the installation cavities are matched with the magnetic steels, each magnetic steel corresponds to an installation cavity, the magnetic steels are embedded in the corresponding installation cavities, each installation cavity corresponds to a core through groove, and the installation cavity and the corresponding core through groove are not communicated.

8. The electric machine of claim 7, wherein, The rotor core is provided with a plurality of installation cavities, two ends of the installation cavities respectively extend to both ends of the rotor core, the plurality of installation cavities are distributed at intervals along the circumference of the rotor core, the installation cavities are matched with the magnetic steels, each magnetic steel corresponds to an installation cavity, the magnetic steels are embedded in the corresponding installation cavities, each installation cavity corresponds to a core through groove, and the installation cavity and the corresponding core through groove are not communicated.

9. The electric machine of claim 1, wherein, The motor shaft is provided with two balance blocks outside the circumference, and the rotor core is located between the two balance blocks.

10. The electric machine of claim 1, wherein, The stator core is a silicon steel sheet stator core or an amorphous alloy stator core. The stator core is an integrally formed structure or is formed by laminating a plurality of stator core sheets, and the rotor core is an integrally formed structure or is formed by laminating a plurality of rotor core sheets.

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