Permanent magnet motor structure with power compensation

Abstract

The utility model relates to the technical field of motor equipment, and particularly discloses a permanent magnet motor structure with power compensation, which comprises an inner stator, an outer stator, a rotor, a shell, a front end cover, a rear end cover and a motor base, the front end cover and the rear end cover are arranged at two ends of the shell, the inner stator and the outer stator are arranged in the shell, the rotor is arranged between the inner stator and the outer stator, and the motor base is arranged in the shell. The motor base is arranged on the front end cover, the inner stator is provided with first magnetic steel, the outer stator is provided with second magnetic steel, one side, close to the rear end cover, of the inner stator and the outer stator is provided with a power adjusting assembly, and a heat dissipation mechanism is arranged in the shell and the rear end cover; the heat dissipation mechanism can perform ventilation and heat dissipation on the positions of the outer stator, the inner stator and the rotor, so that the heat dissipation effect of the motor is improved; the power adjusting assembly can increase the output power of the motor, the first magnetic steel can reduce the magnetic leakage between the inner stator and the rotor, and the second magnetic steel can reduce the magnetic leakage between the outer stator and the base, so that the magnetic circuit utilization rate is improved, and the output power of the motor is improved.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and in particular to a permanent magnet motor structure with power compensation. Background Technology

[0002] The dual-stator permanent magnet motor is a high-efficiency motor with two stators that work together to generate a magnetic field that interacts with the rotor's permanent magnets, significantly improving power density and efficiency. Its dual-stator design allows for flexible switching of operating modes, optimizing torque output and speed range, making it particularly suitable for providing high-precision control in industrial equipment. The dual-stator structure also makes the motor more stable and improves efficiency through optimized control methods, especially performing exceptionally well under high speed and high load conditions.

[0003] Chinese invention patent CN109728699B discloses a dual-stator multi-degree-of-freedom motor, which includes a rotor, an inner stator, and an outer stator. The rotor is located between the outer stator and the inner stator, and a magnetic shielding plate is embedded between the inner and outer sides of the rotor. Windings are provided on the inner side of the outer stator and the rotor, as well as on the tooth poles of the inner stator. Permanent magnets or tooth poles are provided on the outer side of the rotor. The inner side of the outer stator, the inner side of the outer side of the rotor, and the outer side of the tooth poles of the inner stator are all spherical. The lower end of the rotor shaft is connected to the inner stator connecting shaft through a joint bearing. The rotor is fixed to the upper part of the output shaft through a rotor connecting plate. The length of the rotor shaft is at the upper opening position of the outer stator and the inner stator, and it can rotate and deflect.

[0004] Regarding the aforementioned technologies, the inner side of the outer stator, the inner side of the outer rotor, and the outer contour of the inner stator tooth poles are all spherical, which may lead to magnetic field asymmetry and uneven magnetic field distribution, and may also cause magnetic leakage, reducing power output and making it impossible to adjust the motor's output power. Furthermore, after prolonged use, the motor temperature may be too high, thus affecting the normal operation of the motor. Therefore, improvements are made to address these issues. Utility Model Content

[0005] In order to improve the heat dissipation capacity of a dual-stator permanent magnet motor and reduce energy loss while adjusting the output power of the motor, this application provides a permanent magnet motor structure with power compensation.

[0006] The permanent magnet motor structure with power compensation provided in this application adopts the following technical solution:

[0007] A permanent magnet motor structure with power compensation includes an output shaft, an inner stator, an outer stator, and a rotor. The inner stator is disposed inside the outer stator, and the rotor is disposed between the inner stator and the outer stator. The output shaft is disposed on the rotor. The motor also includes a housing, a rear end cover, a front end cover, and a base. The front end cover and the rear end cover are respectively disposed at both ends of the housing, and the output shaft rotatably passes through the front end cover. The base is disposed on the front end cover. A first magnet for reducing magnetic leakage between the inner stator and the rotor is embedded in the iron core of the inner stator near the rotor. A second magnet for reducing magnetic leakage between the outer stator and the base is embedded in the iron core of the outer stator near the housing. Power adjustment components for increasing the motor output power are disposed on the inner stator and the outer stator near the rear end cover. A heat dissipation mechanism for cooling the outer stator, the inner stator, and the rotor is disposed inside the housing and the rear end cover.

[0008] By adopting the above technical solution, when the motor is powered on and working, the outer stator, inner stator and rotor generate a lot of heat. The heat dissipation mechanism in this application can ventilate and dissipate heat at the positions of the outer stator, inner stator and rotor. Compared with the prior art, it improves the heat dissipation effect of the motor and reduces the impact of the heat generated by the outer stator, inner stator and rotor on the motor. When the motor output power needs to be increased, the power adjustment component in this application can increase the output power of the motor. When the motor is powered on and working, leakage flux may be generated between the inner stator and rotor and between the outer stator and the frame. The first magnet can reduce the leakage flux between the inner stator and rotor, and the second magnet can reduce the leakage flux between the outer stator and the frame, thereby improving the magnetic circuit utilization rate and increasing the output power of the motor.

[0009] Optionally, the power regulation assembly includes an inner supplementary stator, an outer supplementary stator, a third magnet, and a fourth magnet. The inner supplementary stator is disposed on the side of the inner stator near the rear end cover, the outer supplementary stator is disposed on the side of the outer stator near the rear end cover, the third magnet is embedded in the iron core of the inner supplementary stator near the rotor, and the fourth magnet is embedded in the iron core of the outer supplementary stator near the housing. Both the third magnet and the fourth magnet are annular magnets.

[0010] By adopting the above technical solution, when the motor output power needs to be increased, the inner and outer supplementary stators are energized, the number of winding turns increases, and the motor power increases. When the motor is energized, leakage flux may occur between the inner and outer supplementary stators and the rotor, and between the outer supplementary stator and the frame. The third magnet can reduce the leakage flux between the inner and outer supplementary stators and the rotor, and the fourth magnet can reduce the leakage flux between the outer supplementary stator and the frame, thereby improving the magnetic circuit utilization rate and increasing the motor output power. The ring structure of the third and fourth magnets helps to evenly distribute the magnetic field of the inner and outer supplementary stators, so that the magnetic lines of force close along the ring path, further reducing the leakage flux to the outside, thereby increasing the motor output power.

[0011] Optionally, the heat dissipation mechanism includes a mounting block, fan blades, a dust filter, and a heat dissipation assembly. The mounting block is inserted into the end of the output shaft near the rear end cover, and the mounting block rotates synchronously when the output shaft rotates. The fan blades are mounted on the mounting block. An air outlet is provided on the front end cover, and an air inlet is provided on the rear end cover. The dust filter is located inside the rear end cover and is positioned on the air inlet. The heat dissipation assembly is located inside the housing and is used to guide the gas entering the motor to the outer stator, the inner stator, and the rotor for heat dissipation.

[0012] By adopting the above technical solution, the motor is powered on and drives the output shaft to rotate. The rotation of the output shaft drives the fan blades on the mounting block to rotate. The rotation of the fan blades causes the airflow to pass through the air inlet and be guided to the outer stator, inner stator and rotor by the heat dissipation component. The airflow is then discharged from the air outlet, thereby achieving ventilation and heat dissipation for the outer stator, inner stator and rotor. The dustproof net can ventilate the inside of the housing while preventing external dust from entering the motor.

[0013] Optionally, the heat dissipation assembly includes an air guide plate, a first ventilation cooling cylinder, and a second ventilation cooling cylinder. The air guide plate is disposed inside the housing and located between the fan blade and the rotor. The output shaft is rotatably connected to the air guide plate. The ends of the first ventilation cooling cylinder and the second ventilation cooling cylinder are both disposed on the air guide plate. The outer wall of the first ventilation cooling cylinder abuts against the inner wall of the inner stator, and the inner wall of the second ventilation cooling cylinder abuts against the outer wall of the outer stator. Multiple sets of first ventilation holes are opened at the connection between the air guide plate and the first and second ventilation cooling cylinders. The first and second ventilation cooling cylinders are provided with ventilation channels along their length and corresponding to the first ventilation holes. The two ends of the ventilation channels are opened into flared openings with gradually increasing cross-sections. The ventilation channels communicate with the first ventilation holes.

[0014] By adopting the above technical solution, the airflow generated by the fan blade rotation enters the ventilation channels inside the first and second ventilation cooling cylinders through the first ventilation hole on the air guide plate, and then dissipates from the front cover. Since the first ventilation cooling cylinder abuts against the inner stator and the second ventilation cooling cylinder abuts against the outer stator, the heat generated by the inner and outer stators can be quickly conducted, thereby achieving ventilation and heat dissipation at the outer stator, inner stator, and rotor. Furthermore, because the ventilation channels are opened with gradually increasing cross-sections at both ends, the airflow speed increases when entering the ventilation channels, enhancing the heat exchange effect with the first and second ventilation cooling cylinders, preventing the motor temperature from being too high and affecting its use, and allowing the airflow output from the ventilation channels to be quickly dispersed, further improving the heat dissipation effect.

[0015] Optionally, the air guide plate has a second ventilation hole, which is located between the first ventilation cooling cylinder and the second ventilation cooling cylinder, and the first ventilation hole is larger than the second ventilation hole.

[0016] By adopting the above technical solution, the airflow enters the first ventilation hole and the second ventilation hole through the air guide plate. Since the first ventilation hole is larger than the second ventilation hole, most of the airflow can be guided to the ventilation channel, and part of the airflow can be guided to the rotor for heat dissipation. The airflow is utilized in a targeted manner, which enhances the heat dissipation effect inside the motor.

[0017] Optionally, both the first ventilation cooling cylinder and the second ventilation cooling cylinder are hollow and filled with phase change material, and both the first ventilation cooling cylinder and the second ventilation cooling cylinder are provided with a pouring port for replacing the phase change material at the end near the front end cover.

[0018] By adopting the above technical solution, when the motor generates heat during operation, the phase change material can absorb the heat in a timely manner, and the airflow in the ventilation channel can ventilate and cool the phase change material, thereby improving the phase change material's ability to absorb heat generated by the inner and outer stators, further improving the heat dissipation effect of the inner and outer stators. The pouring port facilitates the replacement of the phase change material, ensuring the heat exchange effect of the phase change material.

[0019] Optionally, the air guide plate is inserted into the end of the housing near the rear end cover.

[0020] By adopting the above technical solution, when the air guide plate, the first ventilation cooling cylinder, and the second ventilation cooling cylinder need to be replaced or repaired, the rear end cover can be opened and the air guide plate removed to separate the air guide plate from the housing. The air guide plate, the first ventilation cooling cylinder, and the second ventilation cooling cylinder can then be maintained directly, thus achieving convenient maintenance of the motor.

[0021] Optionally, the first magnet, the second magnet, the third magnet, and the fourth magnet are all coated with an insulating layer.

[0022] By adopting the above technical solution, coating the first, second, third, and fourth magnets with an insulating layer can reduce the generation of eddy currents, thereby reducing energy loss and temperature rise, and protecting the performance of the magnets.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The heat dissipation mechanism in this application can provide ventilation and heat dissipation for the outer stator, inner stator, and rotor. When the motor is powered on, it drives the fan blades to rotate through the output shaft and generates airflow. When the airflow enters the ventilation channel, the airflow velocity increases, which enhances the heat exchange effect with the first ventilation cooling cylinder and the second ventilation cooling cylinder. The phase change material can absorb heat in time, and the airflow in the ventilation channel can ventilate and cool the phase change material, thereby improving the phase change material's ability to absorb heat generated by the inner stator and outer stator, further improving the heat dissipation effect of the inner stator and outer stator, and avoiding the motor temperature from being too high and affecting its use.

[0025] 2. The housing in this application is internally equipped with an adjustment component, a first magnet, and a second magnet. When the motor output power needs to be increased, the inner and outer supplementary stators are energized, increasing the motor power. When the motor is energized, magnetic leakage may occur between the inner stator and the rotor, and between the outer stator and the frame. Similarly, magnetic leakage may occur between the inner supplementary stator and the rotor, and between the outer supplementary stator and the frame. The first, second, third, and fourth magnets can reduce magnetic leakage to the outside. Furthermore, the annular structure of the third and fourth magnets helps to evenly distribute the magnetic field of the inner and outer supplementary stators, causing the magnetic lines of force to close along the annular path, further reducing magnetic leakage to the outside, thereby improving the magnetic circuit utilization rate and increasing the output power of the motor. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0028] Figure 2 yes Figure 1 Partial structural diagram;

[0029] Figure 3 yes Figure 1 A schematic diagram of the cross-sectional structure;

[0030] Figure 4 yes Figure 2 Explosion-proof diagram of part of the structure;

[0031] Figure 5 yes Figure 4 Another perspective illustration.

[0032] Reference numerals: 1. Housing; 11. Rear end cover; 111. Air inlet; 12. Front end cover; 121. Air outlet; 13. Base; 14. Output shaft; 15. Inner stator; 16. Outer stator; 17. Rotor; 18. First magnet; 19. Second magnet; 2. Heat dissipation mechanism; 21. Mounting block; 22. Fan blade; 23. Dustproof net; 3. Heat dissipation assembly; 31. Air guide plate; 311. First ventilation hole; 312. Second ventilation hole; 32. First ventilation cooling cylinder; 33. Second ventilation cooling cylinder; 34. Ventilation channel; 35. Tilting port; 4. Power adjustment assembly; 41. Inner supplementary stator; 42. Outer supplementary stator; 43. Third magnet; 44. Fourth magnet. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0034] This application discloses a permanent magnet motor structure with power compensation, referring to... Figure 1-4 The system includes an output shaft 14, an inner stator 15, an outer stator 16, and a rotor 17. The inner stator 15 is fixedly installed inside the outer stator 16, and the rotor 17 is rotatably installed between the inner stator 15 and the outer stator 16. The output shaft 14 is fixedly installed on the rotor 17. The system also includes a housing 1, a rear end cover 11, a front end cover 12, and a base 13. The front end cover 12 and the rear end cover 11 are threaded to both ends of the housing 1, and the output shaft 14 is rotatably installed through the front end cover 12. The base 13 is threaded to the front end cover 12. A first magnet 18 is embedded in the iron core of the inner stator 15 near the rotor 17, and a second magnet 19 is embedded in the iron core of the outer stator 16 near the housing 1. A power adjustment assembly 4 is fixedly installed on the inner stator 15 and the outer stator 16 near the rear end cover 11. A heat dissipation mechanism 2 is installed inside the housing 1 and the rear end cover 11.

[0035] When the motor is powered on and operating, the heat dissipation mechanism 2 in this embodiment can ventilate and dissipate heat at the positions of the outer stator 16, inner stator 15, and rotor 17. Compared with the prior art, this improves the heat dissipation effect of the motor and reduces the impact of the heat generated by the outer stator 16, inner stator 15, and rotor 17 on the motor. When the motor output power needs to be increased, the power adjustment component 4 in this embodiment can increase the motor output power. Furthermore, when the motor is powered on and operating, the heat dissipation mechanism 2 can ventilate and dissipate heat at the positions of the outer stator 16 and the frame. There may be magnetic leakage between the inner stator 15 and the rotor 17. The first magnet 18 can reduce the magnetic leakage between the inner stator 15 and the rotor 17, and the second magnet 19 can reduce the magnetic leakage between the outer stator 16 and the frame 13, thereby improving the magnetic circuit utilization and increasing the output power of the motor. In this embodiment, the first magnet 18 is a plurality of strip magnets and is installed in a ring-shaped interval on the side of the iron core of the inner stator 15 near the rotor 17. The second magnet 19 is also a plurality of strip magnets and is installed in a ring-shaped interval on the side of the iron core of the outer stator 16 near the housing 1.

[0036] Reference Figure 3 To increase the motor output power and reduce magnetic leakage between the inner supplementary stator 41 and the rotor 17, and between the outer supplementary stator 42 and the frame 13, the power adjustment component 4 in this embodiment includes an inner supplementary stator 41, an outer supplementary stator 42, a third magnet 43, and a fourth magnet 44. The inner supplementary stator 41 is fixedly installed on the side of the inner stator 15 near the rear end cover 11, and the outer supplementary stator 42 is fixedly installed on the side of the outer stator 16 near the rear end cover 11. The third magnet 43 is embedded in the iron core of the inner supplementary stator 41 near the rotor 17, and the fourth magnet 44 is embedded in the iron core of the outer supplementary stator 42 near the housing 1. Both the third magnet 43 and the fourth magnet 44 are annular magnets.

[0037] When the inner supplementary stator 41 and the outer supplementary stator 42 are energized, the motor power increases. When the motor is energized, leakage flux may occur between the inner supplementary stator 41 and the rotor 17, and between the outer supplementary stator 42 and the frame 13. The third magnet 43 and the fourth magnet 44 can reduce leakage flux, thereby improving the magnetic circuit utilization rate and increasing the output power of the motor. The third magnet 43 and the fourth magnet 44 help to evenly distribute the magnetic field of the inner and outer supplementary stators, so that the magnetic lines of force are closed along the loop path, further reducing leakage flux to the outside, thereby increasing the output power of the motor. In this embodiment, magnetic shielding plates are installed between the first magnet 18 and the third magnet 43, between the second magnet 19 and the fourth magnet 44, and between the inner and outer sides of the rotor 17. The magnetic shielding plates can separate the magnetic circuits between the first magnet 18 and the third magnet 43, between the second magnet 19 and the fourth magnet 44, and between the inner and outer sides of the rotor 17, reducing interference.

[0038] Reference Figure 1 , Figure 2 and Figure 3 When the motor is powered on, a lot of heat is generated at the outer stator 16, inner stator 15 and rotor 17. In order to ventilate and dissipate heat at the locations where heat is generated, the heat dissipation mechanism 2 in this embodiment includes a mounting block 21, a fan blade 22, a dustproof net 23 and a heat dissipation assembly 3. The mounting block 21 is inserted and installed at the end of the output shaft 14 near the rear end cover 11, and the mounting block 21 rotates synchronously when the output shaft 14 rotates. The fan blade 22 is fixedly installed on the mounting block 21. An air outlet 121 is provided on the front end cover 12 and an air inlet 111 is provided on the rear end cover 11. The dustproof net 23 is bolted to the rear end cover 11 and installed on the air inlet 111. The heat dissipation assembly 3 is installed inside the housing 1.

[0039] When the motor is powered on, it drives the fan blades 22 on the mounting block 21 to rotate through the output shaft 14. The rotation of the fan blades 22 causes airflow to pass through the air inlet 111 and be guided to the outer stator 16, inner stator 15 and rotor 17 by the heat dissipation component 3. The airflow is then discharged through the air outlet 121, thereby achieving ventilation and heat dissipation for the outer stator 16, inner stator 15 and rotor 17. The dustproof net 23 can ventilate the inside of the housing 1 while preventing external dust from entering the motor. In this embodiment, the fan blades 22 are provided in four sets. Four sets are a preferred method in this embodiment, but other sets can also be provided.

[0040] Reference Figure 2 and Figure 3 To facilitate rapid heat conduction from the outer stator 16, inner stator 15, and rotor 17, the heat dissipation assembly 3 in this embodiment includes a guide plate 31, a first ventilation cooling cylinder 32, and a second ventilation cooling cylinder 33. The guide plate 31 is installed inside the housing 1 and located between the fan blade 22 and the rotor 17. The output shaft 14 is rotatably connected to the guide plate 31. The ends of the first ventilation cooling cylinder 32 and the second ventilation cooling cylinder 33 are welded to the guide plate 31. The outer wall of the first ventilation cooling cylinder 32 abuts against the inner wall of the inner stator 15, and the inner wall of the second ventilation cooling cylinder 33 abuts against the outer wall of the outer stator 16. Multiple sets of first ventilation holes 311 are opened at the connection between the guide plate 31 and the first ventilation cooling cylinder 32 and the second ventilation cooling cylinder 33. The first ventilation cooling cylinder 32 and the second ventilation cooling cylinder 33 are provided with ventilation channels 34 along their length and corresponding to the first ventilation holes 311. The two ends of the ventilation channels 34 are opened into flared openings with gradually increasing cross-sections. The ventilation channels 34 are connected to the first ventilation holes 311.

[0041] The airflow generated by the rotation of the fan blade 22 enters the ventilation channel 34 through the air guide plate 31 and then dissipates from the front cover 12. The airflow can quickly conduct heat generated by the inner stator 15 and the outer stator 16, thereby achieving ventilation and heat dissipation at the outer stator 16, inner stator 15 and rotor 17. When the airflow enters the ventilation channel 34, the airflow speed increases, enhancing the heat exchange effect with the first ventilation cooling cylinder 32 and the second ventilation cooling cylinder 33, avoiding the motor temperature from being too high and affecting its use. It can also quickly disperse the airflow output from the ventilation channel 34, further improving the heat dissipation effect. In this embodiment, the first ventilation cooling cylinder 32 and the second ventilation cooling cylinder 33 are both made of steel. Steel is a preferred material in this embodiment, but it can also be made of copper or other materials.

[0042] Reference Figure 2 In order to make targeted use of airflow, the air guide plate 31 in this embodiment has a second ventilation hole 312. The second ventilation hole 312 is located between the first ventilation cooling cylinder 32 and the second ventilation cooling cylinder 33. The first ventilation hole 311 is larger than the second ventilation hole 312. The airflow is guided by the air guide plate 31 to the ventilation channel 34, and part of the airflow is guided to the rotor 17 for heat dissipation. The targeted use of airflow enhances the heat dissipation effect inside the motor.

[0043] Reference Figure 3 When the motor is powered on, the outer stator 16, inner stator 15, and rotor 17 generate a lot of heat. To absorb the heat in a timely manner, the first ventilation cooling cylinder 32 and the second ventilation cooling cylinder 33 in this embodiment are hollow and filled with phase change material. The ends of the first ventilation cooling cylinder 32 and the second ventilation cooling cylinder 33 near the front end cover 12 are equipped with tilting ports 35. When the motor generates heat, the phase change material can absorb the heat in a timely manner, and the airflow in the ventilation channel 34 can ventilate and cool the phase change material, further improving the heat dissipation effect of the phase change material on the inner stator 15 and the outer stator 16. The tilting ports 35 facilitate the replacement of the phase change material and ensure the heat exchange effect of the phase change material. In this embodiment, the phase change material is paraffin wax, which is a preferred material in this embodiment. Bismuth-based, gallium-based alloys, and other phase change materials can also be used.

[0044] Reference Figure 2When the air guide plate 31, the first ventilation cooling cylinder 32, and the second ventilation cooling cylinder 33 need to be replaced or repaired, in this embodiment, the air guide plate 31 is inserted and installed in the housing 1 at the end near the rear end cover 11. A snap-fit ​​groove is provided on the inner side wall of the housing 1, and a snap-fit ​​block is fixedly installed on the outer side wall of the air guide plate 31. The snap-fit ​​block can be movably inserted into the snap-fit ​​groove, so that the air guide plate 31 is snapped tightly with the housing 1. There are four sets of snap-fit ​​grooves and snap-fit ​​blocks. The snap-fit ​​grooves and snap-fit ​​blocks can separate the air guide plate 31 from the housing 1, and the air guide plate 31, the first ventilation cooling cylinder 32, and the second ventilation cooling cylinder 33 can be maintained directly, which realizes convenient maintenance of the motor.

[0045] When the motor is powered on, eddy currents are generated in the first magnet 18, the second magnet 19, the third magnet 43, and the fourth magnet 44. To reduce the generation of eddy currents, in this embodiment, the first magnet 18, the second magnet 19, the third magnet 43, and the fourth magnet 44 are all coated with an insulating layer. Coating with an insulating layer can reduce the generation of eddy currents, thereby reducing energy loss and temperature rise, and protecting the performance of the magnets. In this embodiment, the insulating layer is made of polyimide, which is a preferred material in this embodiment. Ceramic materials, magnet adhesive, etc. can also be coated.

[0046] The implementation principle of a permanent magnet motor structure with power compensation in this application embodiment is as follows:

[0047] When the motor is powered on, it drives the fan blades 22 to rotate through the output shaft 14 and generate airflow. When the airflow enters the ventilation channel 34, the airflow speed increases, which enhances the heat exchange effect with the first ventilation cooling cylinder 32 and the second ventilation cooling cylinder 33. The phase change material can absorb heat in time, and the airflow in the ventilation channel 34 can ventilate and cool the phase change material, thereby improving the phase change material's ability to absorb heat generated by the inner stator 15 and the outer stator 16, further improving the heat dissipation effect of the inner stator 15 and the outer stator 16, and avoiding the motor temperature from being too high and affecting its use.

[0048] When the inner supplementary stator 41 and the outer supplementary stator 42 are energized, the motor power increases. When the motor is energized, leakage flux may occur between the inner stator 15 and the rotor 17, and between the outer stator 16 and the frame 13. Similarly, leakage flux may occur between the inner supplementary stator 41 and the rotor 17, and between the outer supplementary stator 42 and the frame 13. The first magnet 18, the second magnet 19, the third magnet 43, and the fourth magnet 44 can reduce leakage flux to the outside. Furthermore, the annular structure of the third magnet 43 and the fourth magnet 44 helps to evenly distribute the magnetic field of the inner and outer supplementary stators, making it easier for the magnetic lines of force to close along the annular path, further reducing leakage flux to the outside, thereby improving the magnetic circuit utilization rate and increasing the output power of the motor.

[0049] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0050] The above are all optional embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A permanent magnet motor structure with power compensation, comprising an output shaft (14), an inner stator (15), an outer stator (16), and a rotor (17), wherein the inner stator (15) is disposed inside the outer stator (16), the rotor (17) is disposed between the inner stator (15) and the outer stator (16), and the output shaft (14) is disposed on the rotor (17), characterized in that: It also includes a housing (1), a rear end cover (11), a front end cover (12), and a base (13). The front end cover (12) and the rear end cover (11) are respectively disposed at both ends of the housing (1), and the output shaft (14) is rotatably disposed through the front end cover (12). The base (13) is disposed on the front end cover (12). The inner stator (15) has a first magnet (18) embedded in its core near the rotor (17) to reduce magnetic leakage between the inner stator (15) and the rotor (17). The outer stator... The iron core of the rotor (16) is embedded with a second magnet (19) on the side of the housing (1) to reduce the leakage magnetic field between the outer stator (16) and the frame (13). The inner stator (15) and the outer stator (16) are provided with a power adjustment component (4) to increase the output power of the motor on the side of the rear end cover (11). The housing (1) and the rear end cover (11) are provided with a heat dissipation mechanism (2) for dissipating heat from the outer stator (16), the inner stator (15) and the rotor (17).

2. The permanent magnet motor structure with power compensation according to claim 1, characterized in that: The power regulation assembly (4) includes an inner supplementary stator (41), an outer supplementary stator (42), a third magnet (43), and a fourth magnet (44). The inner supplementary stator (41) is located on the side of the inner stator (15) near the rear end cover (11), and the outer supplementary stator (42) is located on the side of the outer stator (16) near the rear end cover (11). The third magnet (43) is embedded in the iron core of the inner supplementary stator (41) near the rotor (17), and the fourth magnet (44) is embedded in the iron core of the outer supplementary stator (42) near the housing (1). Both the third magnet (43) and the fourth magnet (44) are annular magnets.

3. The permanent magnet motor structure with power compensation according to claim 1, characterized in that: The heat dissipation mechanism (2) includes a mounting block (21), a fan blade (22), a dustproof net (23), and a heat dissipation component (3). The mounting block (21) is inserted into the end of the output shaft (14) near the rear end cover (11), and the mounting block (21) rotates synchronously when the output shaft (14) rotates. The fan blade (22) is mounted on the mounting block (21). An air outlet (121) is provided on the front end cover (12), and an air inlet (111) is provided on the rear end cover (11). The dustproof net (23) is located inside the rear end cover (11) and on the air inlet (111). The heat dissipation component (3) is located inside the housing (1) and is used to guide the gas entering the motor to the outer stator (16), the inner stator (15), and the rotor (17) for heat dissipation.

4. The permanent magnet motor structure with power compensation according to claim 3, characterized in that: The heat dissipation assembly (3) includes a guide plate (31), a first ventilation cooling cylinder (32), and a second ventilation cooling cylinder (33). The guide plate (31) is disposed inside the housing (1) and located between the fan blade (22) and the rotor (17). The output shaft (14) is rotatably connected to the guide plate (31). The ends of the first ventilation cooling cylinder (32) and the second ventilation cooling cylinder (33) are both disposed on the guide plate (31). The outer wall of the first ventilation cooling cylinder (32) abuts against the inner wall of the inner stator (15). The second ventilation cooling cylinder... The inner wall of the cooling cylinder (33) abuts against the outer wall of the outer stator (16). Multiple sets of first ventilation holes (311) are opened at the connection between the air guide plate (31) and the first ventilation cooling cylinder (32) and the second ventilation cooling cylinder (33). The first ventilation cooling cylinder (32) and the second ventilation cooling cylinder (33) are provided with ventilation channels (34) along the length direction and corresponding to the first ventilation holes (311). The two ends of the ventilation channels (34) are opened with flared mouths with gradually increasing cross sections. The ventilation channels (34) are connected to the first ventilation holes (311).

5. The permanent magnet motor structure with power compensation according to claim 4, characterized in that: The air guide plate (31) has a second ventilation hole (312), which is located between the first ventilation cooling cylinder (32) and the second ventilation cooling cylinder (33). The first ventilation hole (311) is larger than the second ventilation hole (312).

6. The permanent magnet motor structure with power compensation according to claim 4, characterized in that: The first ventilation cooling cylinder (32) and the second ventilation cooling cylinder (33) are both hollow and filled with phase change material. The ends of the first ventilation cooling cylinder (32) and the second ventilation cooling cylinder (33) near the front end cover (12) are provided with pouring ports (35) for replacing the phase change material.

7. The permanent magnet motor structure with power compensation according to claim 4, characterized in that: The air guide plate (31) is inserted into the end of the housing (1) near the end cover (11).

8. The permanent magnet motor structure with power compensation according to claim 2, characterized in that: The first magnet (18), the second magnet (19), the third magnet (43) and the fourth magnet (44) are all coated with an insulating layer.

Images