Submersible permanent magnet synchronous motor with segmented iron cores

Abstract

The invention belongs to the technical crossing field of motor engineering and oil exploitation equipment, and discloses a submersible permanent magnet synchronous motor with segmented iron cores. The protection component is composed of an aluminum substrate and a stainless steel metal frame; the heat dissipation component is arranged in the protection component; the oil supplementing component is arranged in the protection component and is in transmission connection with the heat dissipation component; the motor component comprises a motor output shaft and adopts a segmented iron core and magnetic steel heat insulation coupling design; wherein the heat dissipation component comprises a driving gear fixedly arranged on the outer wall of the output shaft of the motor in a sleeving mode, the heat dissipation mechanism is arranged, the design that a second rotating rod and a fan blade set are combined is adopted, air circulation is smoother, the second rotating rod drives the fan blade set to effectively exhaust hot air from the interior of the motor when rotating, and the heat dissipation effect is better. And the filter screen in the air inlet groove is cleaned through the cleaning brush, so that impurity accumulation is prevented, air circulation is enhanced, efficient operation of the heat dissipation assembly is kept, and the temperature of motor parts is effectively reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the cross field of motor engineering and oil exploitation equipment technology, and particularly relates to a sub-section iron core submersible permanent magnet synchronous motor. BACKGROUND

[0002] In the field of oil exploitation, the traditional submersible asynchronous motor has the shortcomings of low efficiency and insufficient power factor due to structural limitations, and is difficult to meet the demand for high efficiency and energy saving. The submersible permanent magnet synchronous motor is excited by a permanent magnet, which reduces the rotor copper loss and iron loss, and greatly improves the system efficiency. The sub-section iron core structure adopts modular design, which divides the stator and rotor iron core into multiple sections along the axial direction. By shortening the length of the magnetic steel, the risk of breakage is reduced, and the weight of a single section is reduced to 1 / 3 of the traditional design, supporting the sub-section hoisting and online replacement in the well, significantly reducing the manufacturing difficulty and shortening the maintenance time by 70%. At the same time, the natural oil channel formed by the sub-section gap increases the oil flow rate on the surface of the magnetic steel by 3 times, and the temperature rise is reduced by 40 DEG C. The irreversible demagnetization rate of the magnetic steel is reduced from 8% to 1.2% at a high temperature of 150 DEG C. The built-in magnetic steel in the V-shaped slot and the silicon steel magnetic bridge strengthening structure compress the leakage magnetic flux to below 3%, and the mechanical strength of the rotor is improved by 40%. In addition, the 10-pole 12-slot fractional-slot concentrated winding and the sub-section type end optimization design are adopted, the slot fill rate is increased to 78%, the end copper loss is reduced by 22%, and the edge contact stress is reduced by the drum-shaped tooth modification technology, which synchronously reduces the harmonic content, vibration and noise, and realizes the organic unification of high efficiency, reliability and easy maintenance.

[0003] For example, the utility model with publication number CN220510847U discloses a sub-section iron core submersible permanent magnet synchronous motor, which belongs to the category of motor structure design, mainly comprising a stator core, a rotor core, a winding, a magnetic bridge and a permanent magnet. The motor adopts a 16-pole rotor and an 18-slot stator, and the motor iron core adopts a sub-section structure, which can be freely combined with N sections. The surface-mounted permanent magnet of the rotor is a neodymium iron boron magnet. The magnetic circuit structure is simple and reasonable, realizing low-speed large torque. The motor uses oil circulation for heat dissipation, effectively utilizing environmental conditions to solve the heat dissipation problem. The motor structure is simple, the performance is superior, the operation is safe and reliable, and it is suitable for popularization and use in oil fields.

[0004] In the long-term operation of the above-mentioned submersible permanent magnet synchronous motor, multiple heat sources such as stator copper loss, iron loss, permanent magnet eddy current loss and bearing friction are superimposed, causing the temperature of the motor body to continue to rise. When the temperature of the magnetic steel exceeds the critical value of the intrinsic coercive force of the neodymium iron boron permanent magnet or the Curie temperature threshold, the magnetic domain structure is irreversibly disoriented due to thermal disturbance, the magnetic energy product decays, and the torque output capability decreases. At the same time, the high temperature environment accelerates the molecular chain rupture of the polyimide insulating paint and the epoxy resin pouring sealant, resulting in a decrease in the dielectric strength of the insulating layer and a drop in the partial discharge inception voltage below the breakdown threshold. Finally, a vicious cycle of magnetic-electric double failure coupling is formed.

[0005] Therefore, a sub-core submersible permanent magnet synchronous motor is proposed to solve the problems proposed in the background art. SUMMARY

[0006] To solve the problems proposed in the background art, the present application provides a sub-core submersible permanent magnet synchronous motor.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solution: a sub-core submersible permanent magnet synchronous motor, comprising: The protection component is composed of an aluminum base plate and a stainless steel metal frame. The heat dissipation component is arranged inside the protection component. The oil supplement component is arranged inside the protection component and is in transmission connection with the heat dissipation component. The motor component includes a motor output shaft and is designed with a sub-core and a magnetic steel heat insulation coupling. The heat dissipation component includes a drive gear fixedly sleeved on the outer wall of the motor output shaft, a mounting bracket rotatably sleeved on the outer wall of the motor output shaft, and the mounting bracket is fixedly connected with the inner wall of the protection component. The mounting bracket is designed in a cross shape and has four groups of heat dissipation mechanisms arranged on the outer wall. The heat dissipation mechanism is composed of a heat dissipation assembly and a cleaning assembly. The heat dissipation assembly includes a rotating rod two rotatably installed on the outer wall of the mounting bracket. The rotating rod two penetrates the mounting bracket, and a plurality of fan blade groups are fixedly sleeved on the outer wall of the rotating rod two.

[0008] Preferably, the outer wall of the rotating rod two is fixedly sleeved with a transmission gear and a pinion.

[0009] Preferably, the protection component includes a rectangular box, and four air inlet grooves are formed on one side of the outer wall of the rectangular box, and a filter screen is arranged on the inner wall of each air inlet groove.

[0010] Preferably, one end of the rotating rod two extends out of the rectangular box and is fixedly sleeved with a cleaning brush on the outer wall, and the cleaning brush abuts against the filter screen on the inner wall of the air inlet groove.

[0011] Preferably, the oil supplement component includes an air outlet net arranged on the side of the rectangular box away from the air inlet groove, and a gear block is rotatably installed on the inner wall of the rectangular box, and the gear block is in meshing connection with the pinion.

[0012] Preferably, a cleaning strip is fixedly installed on the inner wall of the gear block, and the cleaning strip abuts against the air outlet net, and a rotating rod three is fixedly installed on one side of the cleaning strip.

[0013] Preferably, a connecting rod two and a crescent block are fixedly sleeved on the outer wall of the rotating rod three, and a cylinder is fixedly installed on one side of the outer wall of the connecting rod two.

[0014] Preferably, a top inner wall of the rectangular box is fixedly provided with an oil filling tank, a top of the oil filling tank is fixedly provided with an oil filling pipe, a top end of the oil filling pipe extends out of the rectangular box, a bottom of the oil filling tank is fixedly provided with a connecting pipe, an outer wall of the motor component is provided with a rectangular hollow block, one end of the rectangular hollow block is in communication with an oil injection hole in the motor component, the connecting pipe is fixedly connected with the rectangular hollow block, and the rectangular hollow block is internally provided with a control valve.

[0015] Preferably, an outer wall of the motor component is rotatably provided with a rotating rod one, an outer wall of the rotating rod one is fixedly provided with a rotating block and a connecting rod one, and an outer wall of the connecting rod one is fixedly provided with an inclined block.

[0016] Preferably, an inner part of the rectangular box is provided with a round rod, the round rod is elastically connected with the motor component through a spring telescopic rod assembly, an outer wall of the round rod is fixedly provided with a protruding block, and the round rod is slidably connected with the rectangular hollow block.

[0017] Compared with the prior art, the application has the following beneficial effects: The application sets the heat dissipation mechanism, adopts the combination design of the rotating rod two and the fan blade group, makes the air circulation more smooth, the rotating rod two drives the fan blade group to effectively discharge the hot air from the motor interior when rotating, and the filter screen in the air inlet groove is cleaned by the cleaning brush, so that the impurity accumulation is prevented, the air circulation is enhanced, the efficient operation of the heat dissipation assembly is maintained, the temperature of the motor component is effectively reduced, the equipment overheating caused by poor heat dissipation is avoided, and the working stability and service life of the motor are improved.

[0018] The application realizes the accurate supply of the lubricating oil through the control valve in the rectangular hollow block, the rotation of the motor component drives a series of mechanical assemblies to work, the lubricating oil flow is pushed, the lubricating oil supply is ensured to be synchronous with the motor working state, the design of the control valve can avoid too much or insufficient lubricating oil, prevents the friction damage caused by improper lubrication, the working efficiency of the motor component is improved, the service life is prolonged, and the maintenance cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a whole structure schematic view of the application; Figure 2 It is an internal structure schematic view of the rectangular box of the application; Figure 3 It is an enlarged structure schematic view of A in the application; Figure 2 Figure 4 It is a heat dissipation mechanism structure schematic view of the application; Figure 5 It is a local explosion structure schematic view of the heat dissipation mechanism of the application; ​Figure 6 A partial cross-sectional structure diagram of the oil supplementing component of the present application; Figure 7 A matching structure diagram of the connecting rod two and the crescent block of the present application; Figure 8 A partial explosion structure diagram of the present application; Figure 9 A partial structure diagram of the motor component of the present application.

[0020] In the figure: 100, protection component; 11, rectangular box; 111, air inlet slot; 200, heat dissipation component; 21, driving gear; 22, mounting rack; 221, rotating rod two; 2211, transmission gear; 2212, cleaning brush; 2213, fan blade group; 2214, pinion; 300, oil supplementing component; 31, air outlet net; 311, gear block; 32, rotating rod three; 321, cleaning strip; 322, connecting rod two; 3221, cylinder; 323, crescent block; 400, motor component; 41, motor output shaft; 401, rotating rod one; 4011, rotating block; 4012, connecting rod one; 40121, inclined block; 403, round rod; 402, rectangular hollow block; 4031, protruding block; 404, spring telescopic rod assembly; 405, oil tank; 4051, connecting pipe; 4052, oil injection pipe. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0022] As shown in Figures 1 to 9 , the present application provides a segmented core submersible permanent magnet synchronous motor, comprising: The protection component 100 is composed of an aluminum base plate and a stainless steel metal frame; The heat dissipation component 200 is arranged inside the protection component 100; The oil supplementing component 300 is arranged inside the protection component 100 and is in transmission connection with the heat dissipation component 200; The motor component 400 comprises a motor output shaft 41 and adopts a segmented core and magnetic steel heat insulation coupling design; The heat dissipation component 200 comprises a driving gear 21 fixedly sleeved on the outer wall of the motor output shaft 41. The outer wall of the motor output shaft 41 is rotatably sleeved with a mounting frame 22. The mounting frame 22 is fixedly connected with the inner wall of the protection component 100. The mounting frame 22 is designed in a cross shape and is provided with four groups of heat dissipation mechanisms on the outer wall. The heat dissipation mechanism comprises a heat dissipation assembly and a cleaning assembly. The heat dissipation assembly comprises a rotating rod two 221 rotatably installed on the outer wall of the mounting frame 22. The rotating rod two 221 penetrates through the mounting frame 22. A plurality of groups of fan blades 2213 are fixedly sleeved on the outer wall of the rotating rod two 221. A transmission gear 2211 and a pinion 2214 are fixedly sleeved on the outer wall of the rotating rod two 221. The transmission gear 2211 is engaged with the driving gear 21. The protection component 100 comprises a rectangular box 11. Four groups of air inlet grooves 111 are formed in the outer wall of one side of the rectangular box 11. A filter screen is arranged on the inner wall of each group of air inlet grooves 111. One end of the rotating rod two 221 extends out of the rectangular box 11 and is fixedly sleeved with a cleaning brush 2212 on the outer wall. The cleaning brush 2212 abuts against the filter screen on the inner wall of the air inlet groove 111.

[0023] By adopting the above scheme, the cleaning strip 321 is fixedly installed on the inner wall of the gear block 311 and abuts against the air exhaust net 31. The rotation of the cleaning strip 321 effectively removes the dust and impurities that may accumulate on the surface of the air exhaust net 31 through physical contact with the air exhaust net 31, keeps the air exhaust net 31 unobstructed, ensures that the air exhaust net 31 can provide continuous and efficient air flow during the heat dissipation process, reduces the internal temperature of the system, and prevents the equipment from overheating due to poor heat dissipation. With the heat generated by the operation of the motor component 400, the cleaning effect of the air exhaust net 31 is crucial to the smoothness of air flow. If the air exhaust net 31 is blocked by impurities, the heat dissipation effect will be greatly reduced, which may cause the motor component 400 to overheat. The design of the cleaning strip 321 optimizes the heat dissipation system and enhances the cooling capacity of the overall equipment.

[0024] As Figures 6 to 9As shown, the oil supplementing component 300 includes the exhaust screen 31 arranged on the side of the rectangular box 11 away from the air inlet slot 111, the gear block 311 is rotatably installed on the inner wall of the rectangular box 11 and engages with the pinion 2214, the cleaning strip 321 is fixedly installed on the inner wall of the gear block 311 and abuts against the exhaust screen 31, the rotating rod three 32 is fixedly installed on one side of the cleaning strip 321, the connecting rod two 322 and the crescent block 323 are fixedly sleeved on the outer wall of the rotating rod three 32, the cylindrical body 3221 is fixedly installed on the outer wall of one side of the connecting rod two 322, the oil loading tank 405 is fixedly installed on the top inner wall of the rectangular box 11, the oil filling pipe 4052 is fixedly installed on the top of the oil loading tank 405 and extends out of the rectangular box 11, the connecting pipe 4051 is fixedly installed on the bottom of the oil loading tank 405, the rectangular hollow block 402 is arranged on the outer wall of the motor component 400, one end of the rectangular hollow block 402 communicates with the oil injection hole in the motor component 400, the connecting pipe 4051 is fixedly connected with the rectangular hollow block 402, the control valve is arranged in the rectangular hollow block 402, the rotating rod one 401 is rotatably installed on the outer wall of the motor component 400, the rotating block 4011 and the connecting rod one 4012 are fixedly sleeved on the outer wall of the rotating rod one 401, the inclined block 40121 is fixedly installed on the outer wall of the connecting rod one 4012, the round rod 403 is arranged in the rectangular box 11 and elastically connected with the motor component 400 through the spring telescopic rod assembly 404, the convex block 4031 is fixedly installed on the outer wall of the round rod 403, the round rod 403 is slidably connected with the rectangular hollow block 402, and the cylindrical body 3221 is movably connected with the rotating block 4011.

[0025] By adopting the above scheme, the control valve arranged in the rectangular hollow block 402 controls the flow of the lubricating oil. Through the rotation of the motor component 400, the rotating rod one 401 drives the rotating block 4011 to act, drives the inclined block 40121 to push the round rod 403, and thus pushes the control valve to open and close through the movable round rod 403, so as to control the supply of the lubricating oil, ensures the high synchronization of the supply of the lubricating oil and the working state of the motor, avoids the excess or deficiency of the lubricating oil, effectively delivers the lubricating oil to the inside of the motor component 400, avoids the waste caused by the excess supply of the lubricating oil or the friction damage caused by the insufficient supply of the lubricating oil, prolongs the service life of the motor component 400, and reduces the maintenance cost.

[0026] The gear block 311 is installed on the inner wall of the rectangular box 11 and is engaged with the pinion 2214, forming an efficient transmission structure. The rotation of the gear block 311 is in contact with the exhaust net 31 through the cleaning strip 321, which not only plays a cleaning role but also works cooperatively by driving the rotation of other components; when the motor output shaft 41 starts to rotate, it drives the rotating rod one 401 and the rotating block 4011 to rotate, thereby accurately supplying lubricating oil and avoiding uneven oil supply due to power transmission lag or error; the circular rod 403 is elastically connected to the outer wall of the motor component 400 through the spring telescopic rod assembly 404; when the inclined block 40121 is not in contact with the circular rod 403, the spring telescopic rod assembly 404 rebounds, so that the circular rod 403 and the protrusions 4031 on the outer wall thereof are not in contact with the control valve in the rectangular hollow block 402, so that the control valve is closed.

[0027] The working principle and use process of the present application are as follows: Firstly, the lubricating oil is injected into the oil tank 405, and the lubricating oil flows into the rectangular hollow block 402 through the connecting pipe 4051 by relying on the action of gravity; in the initial state, the control valve in the rectangular hollow block 402 is in the closed state, and the purpose of this design is to prevent the lubricating oil from entering the interior of the motor component 400; When the motor component 400 starts, the motor output shaft 41 starts to rotate; the rotation of the motor output shaft 41 drives the mounting frame 22 to rotate, and the transmission gear 2211 on the mounting frame 22 is engaged with the rotating rod two 221, further driving the rotation of the rotating rod two 221; The rotating rod two 221 drives the rotation of the cleaning brush 2212 and the fan blade group 2213; the cleaning brush 2212 can clean the impurities attached to the filter screen of the air inlet groove 111 during rotation, preventing the filter screen from being blocked, thereby ensuring air circulation; the fan blade group 2213 constantly rotates to exchange the air outside the rectangular box 11 with the exhaust net 31, effectively reducing the temperature inside the rectangular box 11 and maintaining the heat dissipation effect of the system; Through the engagement of the pinion 2214 and the gear block 311, the gear block 311 starts to rotate and drives the rotating rod three 32 and the connecting rod two 322 to rotate; the rotating rod three 32 further drives the crescent block 323 to rotate, and the crescent block 323 is connected to the cylinder 3221 through its structure; the cylinder 3221 is movably connected to the rotating block 4011; The rotation of the rotating block 4011 drives the motor output shaft 41 to rotate intermittently; this rotation is connected to the connecting rod one 4012 through the rotating rod one 401, and pushes the inclined block 40121 to rotate; the inclined block 40121 is designed in an inclined structure, and when it rotates to contact the circular rod 403, the inclined surface pushes the circular rod 403 to move towards the rectangular hollow block 402; The round rod 403 drives the convex block 4031 to slide in the rectangular hollow block 402 by its movement; when the convex block 4031 moves to the control valve position, the control valve is activated and opened, allowing the lubricating oil to enter the rectangular hollow block 402 through the connecting pipe 4051, and then enter the motor part 400 to supplement the lubricating oil; when the inclined block 40121 is not in contact with the round rod 403, the spring telescopic rod assembly 404 rebounds, so that the round rod 403 and the convex block 4031 on the outer wall thereof are not in contact with the control valve in the rectangular hollow block 402, so that the control valve is closed.

[0028] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that are not specifically enumerated herein. Moreover, no limitation or embodiment is intended to be implied by the use of the term "comprising" or "including" or "containing" or "having" or "including" or "carrying" or any other similar term. Furthermore, where such terms as "comprising", "including", "containing", "carrying", "having" and the like are used in the detailed description and / or in the claims, such terms are to be interpreted to permit the inclusion of additional steps, features, structures, elements, and / or components to those claimed by affixing the word "comprising" or "including" or "containing" or "carrying" or "having" or "including" or "carrying" or any other similar term. Thus, the scope of the present application should not be limited by such terms as "comprising", "including", "containing", "carrying", "having" and the like.

[0029] While the embodiments of the application have been shown and described herein, it is to be understood that the application is not limited to the embodiments described, and it is not intended to exclude myriad other embodiments of the present application that are not specifically enumerated herein. Moreover, no limitation or embodiment is intended to be implied by the use of the term "comprising" or "including" or "containing" or "having" or "including" or "carrying" or any other similar term. Furthermore, where such terms as "comprising", "including", "containing", "carrying", "having" and the like are used in the detailed description and / or in the claims, such terms are to be interpreted to permit the inclusion of additional steps, features, structures, elements, and / or components to those claimed by affixing the word "comprising" or "including" or "containing" or "carrying" or "having" or "including" or "carrying" or any other similar term. Thus, the scope of the present application should not be limited by such terms as "comprising", "including", "containing", "carrying", "having" and the like.

Claims

1. A submersible permanent magnet synchronous motor of segmented core, characterized by, Comprise; The protection component (100) is composed of aluminum substrate and stainless steel metal frame; The heat dissipation component (200) is arranged inside the protection component (100); The oil supplement component (300) is arranged inside the protection component (100) and is in transmission connection with the heat dissipation component (200); The motor component (400) comprises a motor output shaft (41), and the motor component (400) is designed in a segmented iron core and magnetic steel heat insulation coupling mode; The heat dissipation component (200) comprises a driving gear (21) fixedly sleeved on the outer wall of the motor output shaft (41), the outer wall of the motor output shaft (41) is rotatably sleeved with a mounting rack (22), the mounting rack (22) is fixedly connected with the inner wall of the protection component (100), the mounting rack (22) is designed in a cross shape and is provided with four groups of heat dissipation mechanisms on the outer wall, the heat dissipation mechanism comprises a heat dissipation assembly and a cleaning assembly, the heat dissipation assembly comprises a rotating rod two (221) rotatably installed on the outer wall of the mounting rack (22), the rotating rod two (221) penetrates through the mounting rack (22), and a plurality of groups of fan groups (2213) are fixedly sleeved on the outer wall of the rotating rod two (221).

2. The subfractionated core's PM Synchronous Motor of claim 1, characterized by: The outer wall of the rotating rod two (221) is fixedly sleeved with a transmission gear (2211) and a pinion (2214), and the transmission gear (2211) is engaged with the driving gear (21).

3. The subfractionated core's PM Synchronous Motor of claim 1, characterized by: The protection component (100) comprises a rectangular box (11), four groups of air inlet grooves (111) are formed in the outer wall of one side of the rectangular box (11), and a filter screen is arranged on the inner wall of each group of air inlet grooves (111).

4. The subfractionated core's PM Synchronous Motor of claim 3, characterized by: One end of the rotating rod two (221) extends out of the rectangular box (11) and is fixedly sleeved with a cleaning brush (2212) on the outer wall, and the cleaning brush (2212) abuts against the filter screen on the inner wall of the air inlet groove (111).

5. The subfractionated core's PM Synchronous Motor of claim 3, characterized by: The oil supplement component (300) comprises an air exhaust net (31) arranged on the side, away from the air inlet groove (111), of the rectangular box (11), a gear block (311) is rotatably installed on the inner wall of the rectangular box (11), and the gear block (311) is engaged with the pinion (2214).

6. The subfractionated core's PM Synchronous Motor of claim 5, characterized by: A cleaning strip (321) is fixedly installed on the inner wall of the gear block (311), the cleaning strip (321) abuts against the air exhaust net (31), and a rotating rod three (32) is fixedly installed on one side of the cleaning strip (321).

7. The subfractionated core's submersible permanent magnet synchronous motor according to claim 6, characterized in that: The outer wall of the rotating rod three (32) is fixedly sleeved with a connecting rod two (322) and a crescent block (323), and a cylinder (3221) is fixedly installed on the outer wall of one side of the connecting rod two (322).

8. The subfractionated core's submersible permanent magnet synchronous motor according to claim 5, characterized in that: The top inner wall of the rectangular box (11) is fixedly provided with an oil filling tank (405), the top of the oil filling tank (405) is fixedly provided with an oil filling pipe (4052), the top end of the oil filling pipe (4052) extends out of the rectangular box (11), the bottom of the oil filling tank (405) is fixedly provided with a connecting pipe (4051), the outer wall of the motor component (400) is provided with a rectangular hollow block (402), one end of the rectangular hollow block (402) is communicated with an oil injection hole in the motor component (400), the connecting pipe (4051) is fixedly connected with the rectangular hollow block (402), and the inside of the rectangular hollow block (402) is provided with a control valve.

9. The subfractionated core's submersible permanent magnet synchronous motor according to claim 8, characterized in that: The outer wall of the motor component (400) is rotatably provided with a rotating rod I (401), the outer wall of the rotating rod I (401) is fixedly provided with a rotating block (4011) and a connecting rod I (4012), the outer wall of the connecting rod I (4012) is fixedly provided with an inclined block (40121), and the cylindrical block (3221) is movably connected with the rotating block (4011).

10. The subfractionated core's PM Synchronous Motor of claim 9, characterized by: The inside of the rectangular box (11) is provided with a round rod (403), the round rod (403) is elastically connected with the motor component (400) through a spring telescopic rod assembly (404), the outer wall of the round rod (403) is fixedly provided with a convex block (4031), and the round rod (403) is slidably connected with the rectangular hollow block (402).

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