Combined magnetic pole type synchronous motor based on magnetic field offset principle

Abstract

The utility model relates to a combined magnetic pole type synchronous motor based on a magnetic field offset principle, and relates to the technical field of synchronous motors. The motor box is arranged on the outer side of a synchronous motor body, the driving shaft is arranged on an output shaft of the synchronous motor body, the rotor is arranged on the outer side of the driving shaft, and the first permanent magnet and the second permanent magnet are arranged on the inner side of the rotor. The inner side of the rotor is provided with first magnet grooves and second magnet grooves, the first magnet grooves and the second magnet grooves are arranged in a V shape, the number of the first permanent magnets, the number of the second permanent magnets, the number of the first magnet grooves and the number of the second magnet grooves are all four, the four first permanent magnets are slidably connected with the four first magnet grooves respectively, and the four second permanent magnets are slidably connected with the four second magnet grooves respectively. The four second permanent magnets are fixed to the inner sides of the four second magnet grooves correspondingly. The magnetic field distribution of the motor is optimized, the influence of magnetic field deviation on motor excitation is reduced, deviation of the moving track of the motor is avoided, the accuracy of motor positioning is ensured, and the stability and reliability of the motor are ensured.

Description

Technical Field

[0001] This application relates to the technical field of synchronous motors, and particularly to a combined-pole type synchronous motor based on the principle of magnetic field offset. Background Art

[0002] The pole type synchronous motor is composed of components such as a stator, a rotor, and an end cover. The permanent magnet synchronous motor uses permanent magnets to provide excitation, making the motor structure relatively simple, reducing processing and assembly costs, eliminating the slip rings and brushes that are prone to problems, improving the reliability of motor operation, and also improving the efficiency and power density of the motor because there is no need for excitation current and no excitation loss.

[0003] In order to optimize the performance of the motor and improve its efficiency, and to ensure the working efficiency and reduction of torque ripple of the pole type synchronous motor, it is usually necessary to use the magnetic field offset technology in the pole type synchronous motor. For example, the Chinese patent with the publication number CN214591212U in the related art proposes a permanent magnet synchronous magnetic levitation motor, which has a new stator structure and rotor structure designed to achieve rotor suspension and driving rotation through the suspension coil and driving coil on the stator respectively. The permanent magnet limit component restricts the axial offset of the rotor, and the suspension coil is controlled by sensor feedback to control the radial suspension gap of the rotor; thus, the suspension structure of this permanent magnet synchronous magnetic levitation motor is simple, simplifying the motor structure, and achieving the advantages of a compact and lightweight structure of the permanent magnet synchronous magnetic levitation motor.

[0004] Regarding the above related technology, the inventor believes that using the magnetic field offset technology in the motor will cause the following problems: Magnetic field offset will change the magnetic field distribution of the motor, which may lead to difficult excitation of the motor, affecting the performance and efficiency of the motor. If the magnetic field of the motor is offset without corresponding correction, it will cause the operating trajectory of the motor to deviate, resulting in inaccurate positioning, increased motor noise, decreased output power, affecting the stability and reliability of the motor, being inconvenient to use, not meeting the actual use requirements, and reducing the use performance and use effect of the synchronous motor. Summary of the Utility Model

[0005] In order to solve the problem that using the magnetic field offset technology in the motor will change the magnetic field distribution of the motor, which may lead to difficult excitation of the motor, affecting the performance and efficiency of the motor, this application provides a combined-pole type synchronous motor based on the principle of magnetic field offset.

[0006] The combined-pole type synchronous motor based on the principle of magnetic field offset provided by this application adopts the following technical solutions:

[0007] A combined-pole type synchronous motor based on the principle of magnetic field offset, comprising a motor box arranged outside the synchronous motor body, a drive shaft arranged on the output shaft of the synchronous motor body, a rotor arranged outside the drive shaft, and a first permanent magnet and a second permanent magnet arranged inside the rotor; a first magnet slot and a second magnet slot are arranged inside the rotor, the first magnet slot and the second magnet slot are arranged in a V shape, the number of the first permanent magnets, the second permanent magnets, the first magnet slots and the second magnet slots is four, the four first permanent magnets are respectively slidably connected with the four first magnet slots, and the four second permanent magnets are respectively fixed inside the four second magnet slots; an adjusting assembly for adjusting the four second permanent magnets is arranged on the rotor, a magnetic field sensor for measuring the magnetic field intensity is arranged on the motor box, a display for displaying the magnetic field data of the magnetic field sensor is arranged on the motor box, a lifting assembly for lifting and adjusting the magnetic field sensor is arranged on the motor box, a protection assembly for protecting the display is arranged on the motor box, a heat dissipation assembly for dissipating heat from the synchronous motor body is arranged on the motor box, a ventilation mechanism is arranged on the motor box, and a moving mechanism for moving the synchronous motor body is arranged at the bottom of the motor box.

[0008] By adopting the above technical solutions, setting four first permanent magnets and four second permanent magnets on the rotor can ensure the reluctance torque of the rotor, improve the rotor power density, broaden the weak magnetic speed regulation range of the rotor, improve the reliability of the rotor, and through the adjusting assembly, the positions of the four first permanent magnets can be adjusted, the distance angles between the four first permanent magnets and the four second permanent magnets can be respectively adjusted, the magnetic field distribution of the rotor can be changed, and the distance angles between the four first permanent magnets and the four second permanent magnets can be adjusted according to the external magnetic field to ensure the stability of the operation of the synchronous motor body and the rotor. The motor box can isolate the external magnetic field and enhance the anti-magnetic interference effect of the synchronous motor body. A magnetic field sensor is arranged above the synchronous motor body to measure and monitor the internal magnetic field of the synchronous motor body to ensure the safety and performance of the synchronous motor body. The height of the magnetic field sensor can be adjusted through the lifting assembly, and the distance between the magnetic field sensor and the synchronous motor body can be adjusted to avoid the magnetic field sensor interfering with the electromagnetic balance inside the synchronous motor body and ensure the use effect of the synchronous motor body. The magnetic field data of the magnetic field sensor is displayed through the display, so that the user can adjust the magnetic field sensor to the best height, and the staff can know whether the distance angles between the four first permanent magnets and the four second permanent magnets are adjusted to the best position angles, and can detect whether the positions between the four first permanent magnets and the four second permanent magnets are adjusted to the best positions, and try to avoid the influence of magnetic field offset on the excitation of the synchronous motor body. The display can be protected through the protection assembly to avoid damage to the display caused by external impacts.

[0009] The synchronous motor body can be cooled by a heat dissipation component, preventing the synchronous motor body from being damaged due to excessive temperature, ensuring the heat dissipation effect of the synchronous motor body. The ventilation mechanism can make the inside of the motor box have the effect of ventilation and heat dissipation, strengthening the heat dissipation effect of the synchronous motor body, and at the same time having a dust-proof effect to prevent dust and particles from entering the inside of the motor box. The moving mechanism can move the motor box and the synchronous motor body to a designated location for use.

[0010] Optionally, the adjusting component includes a support frame fixed on the outside of the rotor. A connecting frame is arranged on the outside of the support frame. A connecting shaft is movably connected to the inside of the connecting frame. A movable gear is arranged on the outside of the connecting shaft. A transmission gear is meshed with the outside of the movable gear. An adjusting disc is arranged on the inside of the transmission gear. A manual turning handle is arranged on the outside of the connecting shaft. Adjusting blocks are arranged on the outside of the four first permanent magnets. Four connecting holes are opened on the inside of the support frame. The four first magnet grooves are respectively parallel and corresponding to the four connecting holes. Four adjusting holes are opened on the inside of the transmission gear. The four adjusting holes are respectively cross-corresponding to the four connecting holes. The four adjusting blocks are respectively slidably connected to the four connecting holes and the four adjusting holes.

[0011] By adopting the above technical solution, by rotating the manual turning handle, the connecting shaft, the movable gear, the transmission gear and the adjusting disc can be driven to rotate in sequence. Through the position and connection cooperation among the four first magnet grooves, the four first permanent magnets, the four adjusting holes, the four connecting holes, the four adjusting blocks and the four limiting round blocks, the four adjusting blocks can be pushed to move. When the four adjusting blocks move, they will respectively drive the four first permanent magnets to slide inside the four first magnet grooves, and the distance angle between the four first permanent magnets and the four second permanent magnets can be adjusted respectively, changing the magnetic field distribution of the rotor. The distance angle between the four first permanent magnets and the four second permanent magnets can be adjusted according to the external magnetic field to ensure the stability of the operation of the synchronous motor body and the rotor.

[0012] Optionally, a limiting pin is threadedly connected to the inside of the connecting frame. A plurality of limiting grooves are opened on the outside of the movable gear. The plurality of limiting grooves are arranged in a circular and equidistant manner on the outside of the movable gear. The plurality of limiting grooves are selectively and movably clamped with the limiting pin. Four movable ring blocks are arranged on the outside of the adjusting disc. An annular groove is opened on the outside of the support frame. The four movable ring blocks are respectively slidably connected to the annular groove.

[0013] By adopting the above technical solution, by rotating the limit pin clockwise, the limit pin can be separated from the current engaged limit groove on the inner side of the movable gear, causing the movable gear to lose its limit. Then, through the adjusting component, the distance angle between the four first permanent magnets and the four second permanent magnets can be adjusted. When the distance angle between the four first permanent magnets and the four second permanent magnets is adjusted to the optimal position, rotate the limit pin counterclockwise, and the limit pin can be moved into the corresponding limit groove at present, so as to re-limit the movable gear, and the movable gear and the transmission gear can be stably meshed at the current position, avoiding the meshing deviation between the movable gear and the transmission gear during the rotation of the rotor.

[0014] Optionally, the lifting component includes a protective square tube fixed on the top of the motor box. A drive box is arranged on the left side of the protective square tube. A threaded rod is movably connected inside the drive box. An activity turning handle is arranged at the top of the threaded rod. A threaded block is threadedly connected to the outer side of the threaded rod. A limit square block is arranged on the outer side of the threaded block. A fixed frame is arranged on the outer side of the limit square block. The magnetic field sensor is fixed inside the fixed frame. A protective shell is movably connected to the top of the fixed frame. The protective shell is located directly above the magnetic field sensor.

[0015] By adopting the above technical solution, rotating the activity turning handle can drive the threaded rod to rotate, and then successively drive the threaded block, the limit square block, the fixed frame and the magnetic field sensor to move up and down, so as to adjust the height of the magnetic field sensor, adjust the distance between the magnetic field sensor and the synchronous motor body, avoid the magnetic field sensor interfering with the electromagnetic balance inside the synchronous motor body, ensure the use effect of the synchronous motor body, and hide and protect the magnetic field sensor through the protective square tube and the protective shell, avoid the magnetic field sensor being damaged due to external impact, and at the same time protect the magnetic field sensor from being interfered by external electronic instruments.

[0016] Optionally, the protection component includes a protection box fixed on the top of the motor box. The display is fixed inside the protection box. A power cord is arranged on the outer side of the display. The power cord is fixedly connected to the magnetic field sensor. A fixed tube is arranged inside the protective square tube. The power cord extends into the protective square tube through the fixed tube.

[0017] By adopting the above technical solution, the display and the magnetic field sensor can be connected and conducted together through the power cord. The magnetic field value between the magnetic field sensor and the synchronous motor body can be conducted to the display. The magnetic field values detected by the magnetic field sensor at different positions can be displayed through the display, so that the user can adjust the magnetic field sensor to the optimal height, avoid the magnetic field sensor interfering with the normal use of the synchronous motor body, and provide real-time and accurate data. The display can be hidden and protected through the protection box to avoid the display being damaged due to external impact.

[0018] Optionally, the heat dissipation component includes a large gear fixed on the outside of the drive shaft. Two small gears are meshed on the outside of the large gear. Activity shafts are arranged inside both of the two small gears. Fan blades are arranged on the outside of both of the two activity shafts.

[0019] By adopting the above technical solution, when the synchronous motor body drives the drive shaft to rotate, it will also drive the large gear to rotate, and then drive the two small gears, the two activity shafts and the two fan blades to rotate respectively to generate wind. Through the cyclic floating of the wind inside the motor box, heat dissipation treatment can be carried out on the synchronous motor body, avoiding the synchronous motor body from being burned out due to excessive temperature, ensuring the heat dissipation effect of the synchronous motor body. By driving the two small gears to rotate through the large gear, the rotation speeds of the two small gears, the two activity shafts and the two fan blades can be increased to ensure the speed of the wind floating.

[0020] Optionally, the ventilation mechanism includes a ventilation pipe fixed on the left side of the motor box. A filter plate is movably connected inside the ventilation pipe. A sealing cover is movably connected to the left side of the ventilation pipe. Uniformly distributed filter holes are formed inside the sealing cover. A movable handle is arranged on the top of the filter plate. The ventilation pipe is communicated with the motor box.

[0021] By adopting the above technical solution, through the cooperation of the ventilation pipe, the filter plate, the filter holes and the sealing cover, the inside of the motor box can have the effect of ventilation and heat dissipation. Cooperating with the cyclic floating of the wind inside the motor box, the heat dissipation effect of the synchronous motor body can be strengthened. At the same time, the sealing cover and the filter plate can make the ventilation pipe have a dust-proof effect, avoiding dust and particles from entering the inside of the motor box through the ventilation pipe, and enabling the inside of the motor box to have a dust-proof effect while ventilating.

[0022] Optionally, the moving mechanism includes a support seat arranged below the motor box. A connecting plate is arranged at the bottom of the motor box. The support seat is movably connected with the connecting plate. Universal wheels are arranged at the four corners of the bottom of the connecting plate. Brakes are arranged on the outside of all four universal wheels.

[0023] By adopting the above technical solution, the support seat, the connecting plate, the motor box, the synchronous motor body and the drive shaft can be moved through the four universal wheels, and the synchronous motor body and the drive shaft can be moved to a designated location for use. The four brakes can respectively fix the four universal wheels, avoiding the phenomenon that the four universal wheels move when the synchronous motor body is in use, and ensuring the stability of the synchronous motor body during use.

[0024] Optionally, the inner bottom wall of the motor box is provided with a heat dissipation aluminum plate, which is fixedly connected to the bottom of the synchronous motor body. A plurality of heat dissipation aluminum blocks are provided on the top of the synchronous motor body, and the plurality of heat dissipation aluminum blocks are arranged at equal distances on the top of the synchronous motor body.

[0025] By adopting the above technical solution, a heat dissipation aluminum plate and a plurality of heat dissipation aluminum blocks are provided to disperse the heat of the synchronous motor body, so that the heat dissipation effect of the synchronous motor body can be further enhanced, and the magnetic field deviation of the synchronous motor body due to excessive temperature can be avoided, and additional magnetic field loss caused by excessive temperature during operation of the synchronous motor body can be avoided as much as possible.

[0026] Optionally, four shielding blocks are provided on the inner side of the rotor, and the four shielding blocks are respectively located between the four first permanent magnets and the four second permanent magnets, and the inner bottom wall and the inner top wall of the motor box are both provided with shielding support blocks, and two of the shielding support blocks are respectively located at the top and bottom of the rotor, and the four first permanent magnets and the four second permanent magnets are evenly distributed on the inner side of the rotor.

[0027] By adopting the above technical solution, by arranging four first permanent magnets and four second permanent magnets on the rotor, the efficiency and output power of the synchronous motor body and the rotor can be improved, vibration and noise can be reduced, and the control effect can be improved. By arranging four shielding blocks on the rotor, the rotor can be prevented from being interfered by electromagnetic wave radiation and electromagnetic interference, and the rotor can change the magnetic flux path to achieve the purpose of automatically reducing the permanent magnet magnetic flux as the speed increases, thereby ensuring the output capacity of the rotor torque and improving the maximum operating speed of the rotor. The two shielding support blocks can enhance the rotor's anti-electromagnetic wave radiation and anti-electromagnetic interference effects.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. When it is necessary to optimize the excitation design of the synchronous motor body and adjust the included angle distance between the four first permanent magnets and the four second permanent magnets, turn the limit pin clockwise to separate the limit pin from the currently engaged limit slot. Rotating the manual turning handle can drive the connecting shaft, the movable gear, the transmission gear, and the adjusting disc to rotate in sequence. Through the position and connection cooperation among the four first magnet slots, the four first permanent magnets, the four adjusting holes, the four connecting holes, the four adjusting blocks, and the four limit round blocks, the four adjusting blocks can be pushed to move. When the four adjusting blocks move, they will respectively drive the four first permanent magnets to slide inside the four first magnet slots, and the included angle distance between the four first permanent magnets and the four second permanent magnets can be adjusted respectively, changing the magnetic field distribution of the rotor. The included angle distance between the four first permanent magnets and the four second permanent magnets can be adjusted according to the external magnetic field to ensure the stability of the operation of the synchronous motor body and the rotor. When the included angle distance between the four first permanent magnets and the four second permanent magnets is adjusted to the optimal position, then turn the limit pin counterclockwise to move the limit pin into the currently corresponding limit slot, and stably engage the movable gear and the transmission gear in the current position to avoid the meshing offset of the movable gear and the transmission gear during the rotation of the rotor. Through the cross-correspondence of the four adjusting holes and the four connecting holes respectively, and the parallel correspondence of the four first magnet slots and the four connecting holes respectively, the four adjusting blocks and the four first permanent magnets can be positioned respectively, and the four first permanent magnets can be stably fixed inside the four first magnet slots to avoid the phenomenon that the four first permanent magnets slide inside the four first magnet slots during the rotation of the rotor;

[0030] 2. The internal magnetic field of the synchronous motor body can be measured and monitored through a magnetic field sensor to ensure the safety and performance of the synchronous motor body. The motor box can also isolate external magnetic fields, enhancing the effect of the synchronous motor body's resistance to magnetic field interference. The magnetic field sensor can be protected from interference by external electronic instruments through the protective square tube and protective shell. By rotating the movable handle, the threaded rod can be driven to rotate, which can then drive the threaded block, limit square block, fixed frame, and magnetic field sensor to move up and down in sequence, enabling the adjustment of the height of the magnetic field sensor and the distance between the magnetic field sensor and the synchronous motor body, avoiding interference of the magnetic field sensor with the electromagnetic balance inside the synchronous motor body, ensuring the usage effect of the synchronous motor body. When the magnetic field sensor moves up and down, the magnetic field value between the magnetic field sensor and the synchronous motor body can be transmitted to the display, and the magnetic field values detected by the magnetic field sensor at different positions can be displayed through the display, facilitating the user to adjust the magnetic field sensor to the optimal height, avoiding interference of the magnetic field sensor with the normal use of the synchronous motor body, providing real-time and accurate data, ensuring the stability of the internal magnetic field of the synchronous motor body, ensuring uniform magnetic fields during the operation of the synchronous motor body, enabling the staff to know whether the distance angle between the four first permanent magnets and the four second permanent magnets has been adjusted to the optimal position angle, detecting whether the positions of the four first permanent magnets and the four second permanent magnets have been adjusted to the optimal positions, and minimizing the impact of magnetic field offset on the excitation of the synchronous motor body;

[0031] 3. When the synchronous motor body drives the drive shaft to rotate, it will drive the large gear, two small gears, two movable shafts, and two fan blades to rotate in sequence, generating wind power. Through the circulating fluttering of the wind power inside the motor box, heat dissipation treatment can be carried out on the synchronous motor body, avoiding burnout of the synchronous motor body due to overheating. By driving the two small gears to rotate through the large gear, the rotation speeds of the two small gears, two movable shafts, and two fan blades can be increased to ensure the speed of the wind power fluttering. Through the combined action of the ventilation pipe, filter plate, filter holes, and sealing cover, the inside of the motor box can have the effect of ventilation and heat dissipation, enhancing the heat dissipation effect of the synchronous motor body. At the same time, the sealing cover and filter plate can make the ventilation pipe have a dust-proof effect, preventing dust and particles from entering the inside of the motor box through the ventilation pipe, enabling the inside of the motor box to have a dust-proof effect while ventilating, further enhancing the heat dissipation effect of the synchronous motor body, avoiding uneven internal magnetic field distribution in the synchronous motor body due to overheating, preventing additional magnetic field losses during the operation of the synchronous motor body, ensuring the temperature during the operation of the synchronous motor body, reducing the impact of magnetic field offset on the temperature rise of the synchronous motor body, and ensuring the reliability and lifespan of the synchronous motor body;

[0032] 4. By setting four first permanent magnets and four second permanent magnets evenly distributed on the rotor, the reluctance torque of the rotor can be guaranteed, the reliability of the rotor is improved, the excitation design of the synchronous motor body is optimized, the influence of magnetic field deviation on the excitation of the synchronous motor body can be reduced, the efficiency and performance of the synchronous motor body are improved, and the internal magnetic field of the synchronous motor body is ensured to be stable. By setting four shielding blocks on the rotor, the rotor can be prevented from being interfered by electromagnetic wave radiation and electromagnetic interference, the rotor can change the magnetic flux path, the purpose of automatically reducing the permanent magnetic flux with the increase of speed can be achieved, the output ability of the rotor torque is guaranteed, the maximum operating speed of the rotor is increased, and the effect of the rotor's resistance to electromagnetic wave radiation and electromagnetic interference can be strengthened by two shielding support blocks, avoiding the magnetic field interference caused by magnetic field deviation to the synchronous motor body and affecting its normal operation, improving the electromagnetic compatibility of the synchronous motor body, optimizing the magnetic field distribution of the motor, reducing the influence of magnetic field deviation on the motor excitation, improving the performance and efficiency of the motor, avoiding the deviation of the motor operation trajectory, and ensuring the accuracy of the motor positioning. Description of the Drawings

[0033] Figure 1 is the overall structural schematic diagram of the embodiment of the present application;

[0034] Figure 2 Cross-sectional view of the motor box connection structure in the embodiment of the present application;

[0035] Figure 3 Top view of the motor box connection structure in the embodiment of the present application;

[0036] Figure 4 Right view of the rotor connection structure in the embodiment of the present application;

[0037] Figure 5 Right view of the adjusting disk connection structure in the embodiment of the present application;

[0038] Figure 6 Right view of the large gear connection structure in the embodiment of the present application;

[0039] Figure 7 Right view of the motor box connection structure in the embodiment of the present application;

[0040] Figure 8 Top view of the protective square tube connection structure in the embodiment of the present application;

[0041] Figure 9 The embodiment of the present application Figure 2 Enlarged view at A in;

[0042] Figure 10 The embodiment of the present application Figure 2 Enlarged view at B in.

[0043] Reference numerals: 1, motor box; 2, synchronous motor body; 3, drive shaft; 4, protective square tube; 5, drive box; 6, threaded rod; 7, movable handle; 8, threaded block; 9, limiting square block; 10, fixed frame; 11, magnetic field sensor; 12, protective shell; 13, protective box; 14, display; 15, power cord; 16, fixed tube; 17, large gear; 18, small gear; 19, movable shaft; 20, fan blade; 21, ventilation pipe; 22, filter plate; 23, sealing cover; 24, support seat; 25, connecting plate; 26, universal wheel; 27, brake; 28, shielding block; 29, heat dissipation aluminum plate; 30, heat dissipation aluminum block; 31, movable grab handle; 32, shielding support block; 33, rotor; 34, support frame; 35, connecting frame; 36, connecting shaft; 37, movable gear; 38, transmission gear; 39, adjusting disc; 40, manual turning handle; 41, rolling block; 42, limiting pin; 43, movable ring block; 44, adjusting block; 45, limiting round block; 46, first permanent magnet; 47, second permanent magnet; 48, stator core; 49, stator winding; 50, movable door; 51, sealing door. Detailed implementation manners

[0044] The following further elaborates on this application in conjunction with the Figures 1-10 accompanying drawings.

[0045] The embodiment of this application discloses a combined magnetic pole type synchronous motor based on the magnetic field offset principle. Referring to Figure 1 and Figure 2 , it includes a motor box 1 arranged outside the synchronous motor body 2, a drive shaft 3 arranged on the output shaft of the synchronous motor body 2, a rotor 33 arranged outside the drive shaft 3, and a first permanent magnet 46 and a second permanent magnet 47 arranged inside the rotor 33; a first magnet slot and a second magnet slot are arranged inside the rotor 33, and the first magnet slot and the second magnet slot are arranged in a V shape. The number of the first permanent magnets 46, the second permanent magnets 47, the first magnet slots, and the second magnet slots is four. The four first permanent magnets 46 are respectively slidably connected to the four first magnet slots, and the four second permanent magnets 47 are respectively fixed inside the four second magnet slots; an adjusting assembly for adjusting the four second permanent magnets 47 is arranged on the rotor 33, a magnetic field sensor 11 for measuring the magnetic field intensity is arranged on the motor box 1, a display 14 for displaying the magnetic field data of the magnetic field sensor 11 is arranged on the motor box 1, a lifting assembly for lifting and adjusting the magnetic field sensor 11 is arranged on the motor box 1, a protective assembly for protecting the display 14 is arranged on the motor box 1, a heat dissipation assembly for dissipating heat from the synchronous motor body 2 is arranged on the motor box 1, a ventilation mechanism is arranged on the motor box 1, and a moving mechanism for moving the synchronous motor body 2 is arranged at the bottom of the motor box 1.

[0046] The adjusting assembly includes a support frame 34 fixed to the outside of the rotor 33. A connecting frame 35 is fixedly connected to the outside of the support frame 34. A connecting shaft 36 is movably connected to the inside of the connecting frame 35. A movable gear 37 is fixedly connected to the outside of the connecting shaft 36. A transmission gear 38 is meshed with the outside of the movable gear 37. An adjusting disc 39 is fixedly connected to the inside of the transmission gear 38. A manual turning handle 40 is fixedly connected to the outside of the connecting shaft 36. Adjusting blocks 44 are fixedly connected to the outside of the four first permanent magnets 46. Limiting circular blocks 45 are fixedly connected to the outside of the four adjusting blocks 44. Four connecting holes are formed in the inside of the support frame 34. The four first magnet grooves are respectively parallel and corresponding to the four connecting holes. Four adjusting holes are formed in the inside of the transmission gear 38. The four adjusting holes are respectively cross-corresponding to the four connecting holes. The four adjusting blocks 44 are respectively slidably connected to the four connecting holes and the four adjusting holes. The four limiting circular blocks 45 are all movably connected to the support frame 34. The diameter of the limiting circular block 45 is larger than the diameter of the adjusting block 44.

[0047] A rolling block 41 is fixedly connected to the outside of the connecting shaft 36. The rolling block 41 is rotationally connected to the connecting frame 35. One end of the connecting shaft 36 away from the manual turning handle 40 sequentially penetrates through the connecting frame 35 and the movable gear 37 and extends to the outside of the rolling block 41. The connecting frame 35 is U-shaped. A limiting pin 42 is threadedly connected to the inside of the connecting frame 35. A plurality of limiting grooves are formed in the outside of the movable gear 37. The plurality of limiting grooves are circularly and equidistantly arranged on the outside of the movable gear 37. The plurality of limiting grooves are selectively and movably clamped with the limiting pin 42. Four movable ring blocks 43 are fixedly connected to the outside of the adjusting disc 39. An annular groove is formed in the outside of the support frame 34. The four movable ring blocks 43 are all slidably connected to the annular groove. The adjusting disc 39 is movably connected to the support frame 34. A stator core 48 is arranged on the outside of the rotor 33. A stator winding 49 is arranged on the outside of the stator core 48. A spiral hole adapted to the thread on the outside of the limiting pin 42 is formed in the inside of the connecting frame 35.

[0048] Four shielding blocks 28 are fixedly connected to the inside of the rotor 33. The four shielding blocks 28 are respectively located between the four first permanent magnets 46 and the four second permanent magnets 47. Shielding support blocks 32 are arranged on the inner bottom wall and the inner top wall of the motor box 1. The two shielding support blocks 32 are respectively located at the top and the bottom of the rotor 33. The materials of the shielding support blocks 32 and the shielding blocks 28 can be selected from iron, steel or other alloy materials, as long as they can effectively shield or guide the magnetic field. Two movable doors 50 are movably connected to the outside of the motor box 1. The two movable doors 50 are both located on the right side of the adjusting disc 39. The right end of the driving shaft 3 sequentially penetrates through the large gear 17, the rotor 33 and the motor box 1 and extends to the right side of the motor box 1.

[0049] The lifting component includes a protective square tube 4 fixed to the top of the motor box 1. A drive box 5 is fixedly connected to the left side of the protective square tube 4. A threaded rod 6 is movably connected inside the drive box 5. The top of the threaded rod 6 is fixedly connected with a movable turning handle 7. A threaded block 8 is threadedly connected to the outside of the threaded rod 6. A limiting square block 9 is fixedly connected to the outside of the threaded block 8. A fixed frame 10 is fixedly connected to the outside of the limiting square block 9. A magnetic field sensor 11 is fixed inside the fixed frame 10. A protective shell 12 is movably connected to the top of the fixed frame 10. A movable screw is threadedly connected inside the protective shell 12. The number of the movable screws is four. The bottom ends of the movable screws sequentially penetrate through the protective shell 12 and the fixed frame 10 and extend to the inside of the fixed frame 10. The protective shell 12 is located directly above the magnetic field sensor 11.

[0050] Limiting square holes are provided on both the left side of the protective square tube 4 and the right side of the drive box 5. The limiting square block 9 is slidably connected to the limiting square holes. A threaded hole adapted to the external thread of the threaded rod 6 is provided inside the threaded block 8. A second bearing is fixedly connected to the outside of the threaded rod 6. The second bearing is fixedly connected to the drive box 5. The bottom end of the threaded rod 6 sequentially penetrates through the drive box 5, the threaded block 8 and the second bearing and extends to the inside of the second bearing. The motor box 1 is fixedly connected to the drive box 5. The protective square tube 4 is communicated with the motor box 1. The length of the fixed frame 10 is equal to the length inside the protective square tube 4. The width of the fixed frame 10 is equal to the width inside the protective square tube 4. The fixed frame 10 is slidably connected inside the protective square tube 4. The protective square tube 4 is a cuboid with a hollow interior and missing top and bottom. A connecting square hole is provided inside the fixed frame 10. The magnetic field sensor 11 is located inside the connecting square hole. A sliding block is fixedly connected to the right side of the fixed frame 10. A sliding long groove is provided on the right side wall of the protective square tube 4. The sliding block is slidably connected to the sliding long groove. Both the sliding block and the sliding long groove are T-shaped. By providing the sliding block and the sliding long groove, the stability of the up-and-down movement of the fixed frame 10 can be improved. By providing the second bearing, the stability of the rotation of the threaded rod 6 can be improved. By providing the limiting square block 9 and the limiting square holes, the circumferential rotation of the threaded block 8 can be restricted.

[0051] The protection component includes a protection box 13 fixed to the top of the motor box 1. A display 14 is fixed inside the protection box 13. A power cord 15 is fixedly connected to the outside of the display 14. The power cord 15 is fixedly connected to the magnetic field sensor 11. A fixed tube 16 is fixedly connected to the inside of the protective square tube 4. The right end of the fixed tube 16 sequentially penetrates through the protective square tube 4 and the protection box 13 and extends to the inside of the protection box 13. The power cord 15 extends to the inside of the protective square tube 4 through the fixed tube 16. A sealing door 51 is movably connected to the front of the protection box 13. An observation window is fixedly connected to the front of the sealing door 51. The inner diameter of the fixed tube 16 is larger than the diameter of the power cord 15. The magnetic field sensor 11 is located above the synchronous motor body 2.

[0052] The heat dissipation component includes a large gear 17 fixed outside the drive shaft 3. Two small gears 18 are meshed outside the large gear 17. Both inner sides of the two small gears 18 are fixedly connected with movable shafts 19. Both outer sides of the two movable shafts 19 are fixedly connected with fan blades 20. Both outer sides of the two movable shafts 19 are fixedly connected with first bearings. Both first bearings are fixedly connected with the motor box 1. One end of the movable shaft 19 away from the fan blade 20 sequentially penetrates through the small gear 18 and the first bearing and extends to the inner side of the first bearing.

[0053] The ventilation mechanism includes a ventilation pipe 21 fixed on the left side of the motor box 1. A filter plate 22 is movably connected inside the ventilation pipe 21. A sealing cover 23 is movably connected to the left side of the ventilation pipe 21. Uniformly distributed filter holes are provided inside the sealing cover 23. A fixed handle is fixedly connected to the left side of the sealing cover 23. The number of the fixed handles is two. A movable handle 31 is fixedly connected to the top of the filter plate 22. The movable handle 31 is movably connected with the ventilation pipe 21. A sliding square hole is provided at the top of the ventilation pipe 21. The filter plate 22 is slidably connected with the sliding square hole. The width of the filter plate 22 is equal to the width of the sliding square hole. The ventilation pipe 21 is communicated with the motor box 1. A sealing gasket is provided between the ventilation pipe 21 and the sealing cover 23.

[0054] The moving mechanism includes a support base 24 arranged below the motor box 1. A connecting plate 25 is fixedly connected to the bottom of the motor box 1. The support base 24 is movably connected with the connecting plate 25. Universal wheels 26 are fixedly connected to the four corners of the bottom of the connecting plate 25. Brakes 27 are fixedly connected to the outer sides of the four universal wheels 26. Connecting screws are threadedly connected to the inside of the connecting plate 25. The number of the connecting screws is four. The bottom ends of the connecting screws sequentially penetrate through the connecting plate 25 and the support base 24 and extend to the inside of the support base 24.

[0055] The inner bottom wall of the motor box 1 is fixedly connected with a heat dissipation aluminum plate 29. The heat dissipation aluminum plate 29 is fixedly connected with the bottom of the synchronous motor body 2. A plurality of heat dissipation aluminum blocks 30 are fixedly connected to the top of the synchronous motor body 2. The plurality of heat dissipation aluminum blocks 30 are arranged at equal distances on the top of the synchronous motor body 2. Both the first bearing and the second bearing are composed of four parts: inner ring, outer ring, rolling elements and cage. The function of the inner ring is to cooperate with the shaft and rotate together with the shaft. The function of the outer ring is to cooperate with the box body and play a supporting role. The materials of the motor box 1 and the protective shell 12 are carbon fiber materials, which can isolate the external magnetic field.

[0056] The implementation principle of a combined magnetic pole type synchronous motor based on the magnetic field offset principle in the embodiment of the present application is as follows:

[0057] (1) The synchronous motor body 2 can drive the drive shaft 3 to rotate. Further, the parts to be driven can be driven to rotate by the drive shaft 3. When the drive shaft 3 rotates, it will also drive the large gear 17 to rotate. Since both small gears 18 are meshed with the large gear 17, when the large gear 17 rotates, it will drive the two small gears 18, the two movable shafts 19 and the two fan blades 20 to rotate respectively. When the two fan blades 20 rotate, wind power will be generated. Through the cyclic floating of the wind power inside the motor casing 1, heat dissipation treatment can be carried out on the synchronous motor body 2, avoiding the synchronous motor body 2 being burned out due to excessive temperature, ensuring the heat dissipation effect of the synchronous motor body 2. By driving the two small gears 18 to rotate through the large gear 17, the rotation speeds of the two small gears 18, the two movable shafts 19 and the two fan blades 20 can be increased to ensure the speed of the wind power floating;

[0058] (2) Through the cooperation of the ventilation pipe 21, the filter plate 22, the filter holes and the sealing cover 23, the inside of the motor casing 1 can have the effect of ventilation and heat dissipation. Cooperating with the cyclic floating of the wind power inside the motor casing 1, the heat dissipation effect of the synchronous motor body 2 can be strengthened. At the same time, the sealing cover 23 and the filter plate 22 can make the ventilation pipe 21 have the effect of dust prevention, avoiding dust and particles from entering the inside of the motor casing 1 through the ventilation pipe 21, enabling the inside of the motor casing 1 to have the effect of ventilation and dust prevention at the same time. Through the heat dissipation aluminum plate 29 and the multiple heat dissipation aluminum blocks 30, the heat of the synchronous motor body 2 can be dispersed, further strengthening the heat dissipation effect of the synchronous motor body 2, avoiding the uneven distribution of the internal magnetic field of the synchronous motor body 2 due to excessive temperature, preventing additional magnetic field loss during the operation of the synchronous motor body 2, ensuring the temperature of the synchronous motor body 2 during operation, reducing the influence of magnetic field offset on the temperature rise of the synchronous motor body 2, and ensuring the reliability and service life of the synchronous motor body 2;

[0059] (3) When it is necessary to disassemble and clean the filter plate 22, the filter plate 22 can be directly pulled out from the inside of the ventilation pipe 21 by grasping the movable handle 31, and the filter plate 22 can be directly disassembled and cleaned. By grasping the two fixed handles, the sealing cover 23 can be pulled off from the outside of the ventilation pipe 21 for cleaning. At the same time, the sealing gasket can ensure the sealing between the sealing cover 23 and the ventilation pipe 21, avoiding the sealing cover 23 falling off from the outside of the ventilation pipe 21 during use;

[0060] (4) The support base 24, connecting plate 25, motor box 1, synchronous motor body 2, and drive shaft 3 can be moved by four universal wheels 26. The synchronous motor body 2 and drive shaft 3 can be moved to a designated location for use. The four brakes 27 can be used to fix the four universal wheels 26 respectively, preventing the four universal wheels 26 from moving when the synchronous motor body 2 is in use, ensuring the stability of the synchronous motor body 2 during use. The connecting plate 25 can be disassembled by four connecting screws, facilitating the disassembly and use of the motor box 1 from above the support base 24;

[0061] (5) When it is necessary to optimize the excitation design of the synchronous motor body 2 and adjust the angular distance between the four first permanent magnets 46 and the four second permanent magnets 47, first open the two movable doors 50 to observe the current positions of the manual turning handle 40 and the limit pin 42. By rotating the limit pin 42 clockwise, the limit pin 42 can be separated from the limit groove currently engaged with the inner side of the movable gear 37, causing the movable gear 37 to lose its limit. Thus, by rotating the manual turning handle 40, the connecting shaft 36 and the movable gear 37 can be driven to rotate in sequence. Since the movable gear 37 meshes with the transmission gear 38, during the rotation of the movable gear 37, the transmission gear 38 and the adjusting disc 39 will be driven to rotate in sequence. Because the four first magnet slots are respectively parallel and corresponding to the four connecting holes, and the four adjusting holes are respectively cross-corresponding to the four connecting holes, through the position and connection cooperation of the four first magnet slots, four first permanent magnets 46, four adjusting holes, four connecting holes, four adjusting blocks 44, and four limit round blocks 45, the four adjusting blocks 44 can be pushed to move. When the four adjusting blocks 44 move, they will respectively drive the four first permanent magnets 46 to slide inside the four first magnet slots, and the distance angle between the four first permanent magnets 46 and the four second permanent magnets 47 can be adjusted respectively, changing the magnetic field distribution of the rotor 33. The distance angle between the four first permanent magnets 46 and the four second permanent magnets 47 can be adjusted according to the external magnetic field to ensure the stability of the operation of the synchronous motor body 2 and the rotor 33;

[0062] (6) When the distance angle between the four first permanent magnets 46 and the four second permanent magnets 47 is adjusted to the optimal position, then turn the limit pin 42 counterclockwise, and the limit pin 42 can be moved into the corresponding limit groove at present, so as to re-limit the movable gear 37, and the movable gear 37 and the transmission gear 38 can be stably engaged at the current position, avoiding the meshing deviation between the movable gear 37 and the transmission gear 38 during the rotation of the rotor 33. Since the four first magnet slots are respectively parallel and corresponding to the four connection holes, and the four adjustment holes are respectively cross-corresponding to the four connection holes, through the position and connection cooperation of the four first magnet slots, the four first permanent magnets 46, the four adjustment holes, the four connection holes, the four adjustment blocks 44 and the four limit round blocks 45, and further through the cross-correspondence of the four adjustment holes and the four connection holes respectively, and the parallel correspondence of the four first magnet slots and the four connection holes respectively, the four adjustment blocks 44 and the four first permanent magnets 46 can be positioned respectively, and the four first permanent magnets 46 can be stably fixed inside the four first magnet slots, avoiding the phenomenon that the four first permanent magnets 46 slide inside the four first magnet slots during the rotation of the rotor 33;

[0063] (7) The internal magnetic field of the synchronous motor body 2 can be measured and monitored by the magnetic field sensor 11 to ensure the safety and performance of the synchronous motor body 2. The external magnetic field can also be isolated through the motor box 1, strengthening the anti-magnetic interference effect of the synchronous motor body 2. At the same time, it can avoid the synchronous motor body 2 being damaged by external force impact during use. The magnetic field sensor 11 can be hidden and protected by the protective square tube 4 and the protective shell 12, avoiding the magnetic field sensor 11 being damaged by external force impact, and at the same time protecting the magnetic field sensor 11 from the interference of external electronic instruments. The protective shell 12 can be disassembled by four movable screws for detecting and maintaining the magnetic field sensor 11;

[0064] (8) When the height of the magnetic field sensor 11 needs to be adjusted, turning the movable handle 7 can drive the threaded rod 6 to rotate. Since the threaded rod 6 is threadedly connected with the threaded block 8, when the threaded rod 6 rotates, it will drive the threaded block 8, the limit square block 9, the fixed frame 10 and the magnetic field sensor 11 to move up and down in sequence, so as to adjust the height of the magnetic field sensor 11, and the distance between the magnetic field sensor 11 and the synchronous motor body 2 can be adjusted, avoiding the magnetic field sensor 11 interfering with the electromagnetic balance inside the synchronous motor body 2, ensuring the use effect of the synchronous motor body 2, avoiding the magnetic field offset making the internal magnetic field of the synchronous motor body 2 unstable, preventing the magnetic field of the synchronous motor body 2 from being uneven during operation, and ensuring the operation stability and service life of the synchronous motor body 2;

[0065] When the magnetic field sensor 11 moves up and down, the magnetic field values between the magnetic field sensor 11 and the synchronous motor body 2 can be transmitted to the display 14. Through the display 14, the magnetic field values detected by the magnetic field sensor 11 at different positions can be measured and displayed, so that the user can adjust the magnetic field sensor 11 to the optimal height, avoid the magnetic field sensor 11 interfering with the normal use of the synchronous motor body 2, provide real-time and accurate data, ensure the stability of the magnetic field inside the synchronous motor body 2, ensure that the magnetic field is uniform when the synchronous motor body 2 operates, enable the staff to know whether the distance angle between the four first permanent magnets 46 and the four second permanent magnets 47 has been adjusted to the optimal position angle, and can detect whether the positions of the four first permanent magnets 46 and the four second permanent magnets 47 have been adjusted to the optimal positions, and try to avoid the influence of magnetic field offset on the excitation of the synchronous motor body 2, ensuring the operation stability and service life of the synchronous motor body 2;

[0066] (10)Through the cooperation of the protection box 13, the sealing door 51 and the observation window, the display 14 can be hidden and protected to prevent the display 14 from being damaged by external impact. The display 14 can be operated by opening the sealing door 51. The value of the display 14 can be directly observed through the observation window. The display 14 and the magnetic field sensor 11 can be connected and conducted together through the power cord 15;

[0067] (11)By arranging four first permanent magnets 46 and four second permanent magnets 47 evenly distributed on the rotor 33, the reluctance torque of the rotor 33 can be ensured, the power density of the rotor 33 can be increased, the weak magnetic speed regulation range of the rotor 33 can be broadened, the reliability of the rotor 33 can be improved, the weak magnetic speed regulation range can be increased, the excitation design of the synchronous motor body 2 can be optimized, the influence of magnetic field offset on the excitation of the synchronous motor body 2 can be reduced, the efficiency and performance of the synchronous motor body 2 can be improved, and the magnetic field inside the synchronous motor body 2 can be kept stable;

[0068] (12)By arranging four shielding blocks 28 on the rotor 33, the rotor 33 can be prevented from being interfered by electromagnetic wave radiation and electromagnetic interference, the rotor 33 can change the magnetic flux path, achieving the purpose of automatically reducing the permanent magnetic flux with the increase of the rotational speed, ensuring the torque output ability of the rotor 33, increasing the maximum operating speed of the rotor 33. Through the two shielding support blocks 32, the effect of the rotor 33 against electromagnetic wave radiation and electromagnetic interference can be strengthened, avoiding the influence of magnetic field offset on the synchronous motor body 2 to generate magnetic field interference and affecting its normal operation, and improving the electromagnetic compatibility of the synchronous motor body 2.

[0069] Compared with the prior art, the overall structure is simple and convenient to use, ensuring the working efficiency of the pole-type synchronous motor, avoiding the change of the magnetic field distribution of the synchronous motor due to magnetic field offset, optimizing the magnetic field distribution of the motor, reducing the influence of magnetic field offset on the motor excitation, improving the performance and efficiency of the motor, avoiding the deviation of the motor running track, ensuring the accuracy of motor positioning, reducing the noise of the motor, increasing the output power of the motor, ensuring the stability and reliability of the motor, meeting the requirements of actual use, improving the use performance and effect of the synchronous motor, preventing the internal magnetic field of the synchronous motor from being unstable due to magnetic field offset, avoiding uneven magnetic field during the operation of the synchronous motor, improving the operation stability and service life of the motor, preventing magnetic field offset from generating magnetic field interference to affect the normal operation of the synchronous motor, improving the electromagnetic compatibility of the synchronous motor, preventing the synchronous motor from generating additional magnetic field loss during operation, ensuring the temperature of the synchronous motor during operation, reducing the influence of magnetic field offset on the temperature rise of the synchronous motor, and ensuring the reliability and service life of the synchronous motor.

[0070] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A combined magnetic pole type synchronous motor based on the principle of magnetic field offset, characterized in that: It includes a motor box (1) arranged outside the synchronous motor body (2), a drive shaft (3) arranged on the output shaft of the synchronous motor body (2), a rotor (33) arranged outside the drive shaft (3), and a first permanent magnet (46) and a second permanent magnet (47) arranged inside the rotor (33). Inside the rotor (33), a first magnet groove and a second magnet groove are arranged. The first magnet groove and the second magnet groove are arranged in a V shape. The number of the first permanent magnets (46), the second permanent magnets (47), the first magnet grooves, and the second magnet grooves is four. The four first permanent magnets (46) are respectively slidably connected to the four first magnet grooves, and the four second permanent magnets (47) are respectively fixed inside the four second magnet grooves. On the rotor (33), an adjusting component is arranged for adjusting the four second permanent magnets (47). On the motor box (1), a magnetic field sensor (11) is arranged for measuring the magnetic field intensity. On the motor box (1), a display (14) is arranged for displaying the magnetic field data of the magnetic field sensor (11). On the motor box (1), a lifting component is arranged for lifting and adjusting the magnetic field sensor (11). On the motor box (1), a protection component is arranged for protecting the display (14). On the motor box (1), a heat dissipation component is arranged for dissipating heat from the synchronous motor body (2). A ventilation mechanism is arranged on the motor box (1). At the bottom of the motor box (1), a moving mechanism is arranged for moving the synchronous motor body (2).

2. The combined magnetic pole type synchronous motor based on the magnetic field offset principle according to claim 1, characterized in that: The adjusting component includes a support frame (34) fixed outside the rotor (33). Outside the support frame (34), a connecting frame (35) is arranged. Inside the connecting frame (35), a connecting shaft (36) is movably connected. Outside the connecting shaft (36), a movable gear (37) is arranged. Outside the movable gear (37), a transmission gear (38) is meshed. Inside the transmission gear (38), an adjusting disk (39) is arranged. Outside the connecting shaft (36), a manual turning handle (40) is arranged. Outside the four first permanent magnets (46), adjusting blocks (44) are arranged. Inside the support frame (34), four connecting holes are opened. The four first magnet grooves are respectively parallel and corresponding to the four connecting holes. Inside the transmission gear (38), four adjusting holes are opened. The four adjusting holes are respectively cross-corresponding to the four connecting holes. The four adjusting blocks (44) are respectively slidably connected to the four connecting holes and the four adjusting holes.

3. The combined magnetic pole type synchronous motor based on the magnetic field offset principle according to claim 2, characterized in that: Inside the connecting frame (35), a limit screw pin (42) is threadedly connected. Outside the movable gear (37), a plurality of limit grooves are opened. The plurality of limit grooves are arranged in a circular equidistant manner outside the movable gear (37). The plurality of limit grooves and the limit screw pin (42) are selectively and movably clamped. Outside the adjusting disk (39), four movable ring blocks (43) are arranged. Outside the support frame (34), an annular groove is opened. The four movable ring blocks (43) are respectively slidably connected to the annular groove.

4. The combined magnetic pole type synchronous motor based on the magnetic field offset principle according to claim 1, characterized in that: The lifting assembly includes a protective square tube (4) fixed to the top of the motor box (1). A drive box (5) is arranged on the left side of the protective square tube (4). A threaded rod (6) is movably connected inside the drive box (5). A movable turning handle (7) is arranged at the top of the threaded rod (6). A threaded block (8) is threadedly connected to the outer side of the threaded rod (6). A limiting square block (9) is arranged on the outer side of the threaded block (8). A fixed frame (10) is arranged on the outer side of the limiting square block (9). The magnetic field sensor (11) is fixed inside the fixed frame (10). A protective shell (12) is movably connected to the top of the fixed frame (10). The protective shell (12) is located directly above the magnetic field sensor (11).

5. The combined pole type synchronous motor based on the magnetic field offset principle according to claim 4, characterized in that: The protective assembly includes a protective box (13) fixed to the top of the motor box (1). A display (14) is fixed inside the protective box (13). A power cord (15) is arranged on the outer side of the display (14). The power cord (15) is fixedly connected to the magnetic field sensor (11). A fixed tube (16) is arranged inside the protective square tube (4). The power cord (15) extends into the protective square tube (4) through the fixed tube (16).

6. The combined magnetic pole type synchronous motor based on the magnetic field offset principle according to claim 1, wherein: The heat dissipation assembly includes a large gear (17) fixed to the outer side of the drive shaft (3). Two small gears (18) are meshed with the outer side of the large gear (17). Movable shafts (19) are arranged inside the two small gears (18). Fan blades (20) are arranged on the outer sides of the two movable shafts (19).

7. A combined magnetic pole type synchronous motor based on the principle of magnetic field offset according to claim 1, characterized in that: The ventilation mechanism includes a ventilation pipe (21) fixed to the left side of the motor box (1). A filter plate (22) is movably connected inside the ventilation pipe (21). A sealing cover (23) is movably connected to the left side of the ventilation pipe (21). Filter holes are evenly distributed inside the sealing cover (23). A movable handle (31) is arranged on the top of the filter plate (22). The ventilation pipe (21) is communicated with the motor box (1).

8. A combined pole type synchronous motor based on the magnetic field offset principle according to claim 1, characterized in that: The moving mechanism includes a support base (24) arranged below the motor box (1). A connecting plate (25) is arranged at the bottom of the motor box (1). The support base (24) is movably connected to the connecting plate (25). Universal wheels (26) are arranged at the four corners of the bottom of the connecting plate (25). Brakes (27) are arranged on the outer sides of the four universal wheels (26).

9. A combined magnetic pole type synchronous motor based on the magnetic field offset principle according to claim 1, characterized in that: A heat dissipation aluminum plate (29) is arranged on the inner bottom wall of the motor box (1). The heat dissipation aluminum plate (29) is fixedly connected to the bottom of the synchronous motor body (2). A plurality of heat dissipation aluminum blocks (30) are arranged on the top of the synchronous motor body (2). The plurality of heat dissipation aluminum blocks (30) are arranged at equal distances on the top of the synchronous motor body (2).

10. A combined magnetic pole type synchronous motor based on the magnetic field offset principle according to claim 1, characterized in that: Four shielding blocks (28) are arranged inside the rotor (33), and the four shielding blocks (28) are respectively located between the four first permanent magnets (46) and the four second permanent magnets (47). Shielding support blocks (32) are arranged on both the inner bottom wall and the inner top wall of the motor housing (1), and the two shielding support blocks (32) are respectively located at the top and the bottom of the rotor (33). The four first permanent magnets (46) and the four second permanent magnets (47) are evenly distributed inside the rotor (33).

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