Permanent magnet synchronous motor and synchronous motor control method based on dynamic balance

Abstract

The application relates to the technical field of permanent magnet synchronous motors, and discloses a permanent magnet synchronous motor and a synchronous motor control method based on dynamic balance, which comprises a body shell, the inside of the body shell is provided with an armature, dynamic balance mechanisms are arranged at the two ends of the armature respectively, the dynamic balance mechanisms comprise damping components, balance components, damping adjusting components and balance adjusting components, the damping components are elastically supported between the body shell and an armature rotating shaft, the balance components are arranged in groups, and the balance components surround the circumferential side of the armature rotating shaft. The balance adjusting components are used for elastically adjusting the balance components on one side of the armature rotating shaft, the balance components on the side are used for supporting and compensating the armature rotating shaft together with the damping components, unbalanced forces and vibrations generated during the operation of the armature are offset, mechanical unbalance at the armature rotating shaft is reduced, dynamic balance adjustment of the permanent magnet synchronous motor is realized, and the service life of the permanent magnet synchronous motor is increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of permanent magnet synchronous motors, in particular to a permanent magnet synchronous motor and a synchronous motor control method based on dynamic balance. BACKGROUND

[0002] Permanent magnet synchronous motors have been widely used in industrial drives, new energy vehicles, household appliances and other fields due to their high efficiency, high power density and excellent control performance. However, during actual operation, permanent magnet synchronous motors still have vibration and noise problems. In particular, after long-term use or high-speed operation, the armature shaft is prone to vibration due to mechanical wear, thermal deformation or unbalanced electromagnetic force, which affects the stability and reliability of the whole machine operation, and even shortens the service life of the motor.

[0003] Currently, common vibration reduction measures mainly rely on passive damping elements such as rubber pads, springs or hydraulic dampers between the motor end cover or shell and the shaft. Although this structure can suppress vibration to some extent, its stiffness and damping characteristics are usually fixed and cannot be dynamically adjusted according to the actual operating state of the motor (such as speed variation or mechanical imbalance after long-term operation). In particular, when the motor is running at high speed, the fixed parameter damping system may not effectively match the vibration frequency, resulting in a decline in damping effect; and when mechanical imbalance occurs after long-term operation, the traditional structure cannot achieve real-time compensation adjustment.

[0004] In addition, some existing technologies attempt to achieve shaft balance correction by adding balance blocks or adjustable counterweight mechanisms, but such structures are often complex and slow to respond, making it difficult to achieve rapid and accurate dynamic balance adjustment during motor operation. At the same time, they do not form a cooperative working mechanism with the damping system, limiting their actual application effect. SUMMARY

[0005] (I) Technical problems solved

[0006] In view of the deficiencies of the prior art, the permanent magnet synchronous motor and the synchronous motor control method based on dynamic balance are provided, which has the advantages of elastic adjustment of the balance assembly on one side of the armature shaft by the balance adjustment assembly, support and compensation of the armature shaft by the balance assembly and the damping assembly on the same side, offset of the unbalanced force and vibration generated during the operation of the armature, reduction of the mechanical imbalance at the armature shaft, dynamic balance adjustment of the permanent magnet synchronous motor, increase of the service life of the permanent magnet synchronous motor, and the like, and solves the problem that the stiffness and damping characteristics of the vibration damping measures of the existing motor are usually fixed and cannot be dynamically adjusted according to the actual operation state of the motor (such as the change of the rotating speed or the mechanical imbalance after long-term operation). In particular, when the motor is running at high speed, the vibration damping system with fixed parameters may not be able to effectively match the vibration frequency, resulting in a decrease in the damping effect; and when mechanical imbalance occurs after long-term operation, the traditional structure cannot realize real-time compensation adjustment.

[0007] (Two) Technical solutions

[0008] To solve the above technical problems, the present application provides the following technical solutions: a permanent magnet synchronous motor, comprising a body shell, the body shell is internally provided with an armature, the armature is provided with a dynamic balance mechanism at both ends, the dynamic balance mechanism comprises a damping assembly, a balance assembly, a damping adjustment assembly and a balance adjustment assembly, the damping assembly is elastically supported between the body shell and the armature shaft, the balance assembly has a plurality of groups, the balance assembly surrounds the side of the armature shaft, and the balance assembly is located at the inner ring on one side of the damping assembly, when the armature shakes, the damping adjustment assembly adjusts the elastic support degree of the damping assembly to be smaller, the balance adjustment assembly adjusts the expansion degree of the balance assembly between the inner ring on one side of the damping assembly and the armature, and the balance assembly balances and compensates the support of the damping assembly to the armature.

[0009] Preferably, the body shell is provided with a front end cover and a rear end cover at both ends, the dynamic balance mechanism is located in the front end cover, the rear end cover is externally provided with a heat dissipation fan blade, the heat dissipation fan blade is externally provided with a fan cover, the fan cover is sleeved on the rear end cover, the heat dissipation fan blade is connected with the armature, the armature shaft is provided with a bearing, the bearing is located in the front end cover, and the dynamic balance mechanism is located outside the bearing, the armature comprises a stator and a rotor, the stator is connected with the body shell, the rotor is rotationally arranged in the middle part of the stator, the rotor is rotationally connected with the front end cover and the rear end cover at both ends, the body shell is provided with a partition plate on both sides, the partition plate is located in the front end cover and the rear end cover respectively, and the rotor passes through the partition plate at both ends.

[0010] Preferably, the damping assembly comprises a damping driving ring, a damping spring sheet and a fixed support ring, the fixed support ring is fixedly connected with the inner wall of the front end cover, the damping driving ring is connected with the bearing, the damping spring sheet is located between the damping driving ring and the fixed support ring, the balance assembly is located on the side of the damping spring sheet, and the balance assembly is located between the fixed support ring and the bearing.

[0011] Preferably, the damping spring sheet comprises a positioning adjusting end, an elastic supporting end and a balance following end, the positioning adjusting end is located on the damping driving ring, an arc-shaped groove is formed in the fixed support ring, one side of the balance following end is located in the arc-shaped groove and abuts against one end of the arc-shaped groove, the elastic supporting end is located between the positioning adjusting end and the balance following end, and the elastic supporting end is protrusively and bendedly arranged towards the fixed support ring, and the outer side of the elastic supporting end is fixedly connected with the fixed support ring.

[0012] Preferably, an arc-shaped groove is formed in the damping driving ring, a gear is arranged on one side of the inner wall of the arc-shaped groove, a damping driving gear is arranged in the arc-shaped groove, damping driving rods are arranged at two ends of the damping driving gear, the damping driving rods are rotatably connected with the surface of the partition plate and the front end cover, and one end of each damping driving rod extends outside the front end cover and is provided with a knob.

[0013] Preferably, the balance assembly comprises a mounting ring, a balance spring sheet and a moving support block, the mounting ring is fixedly connected with the inner wall of the fixed support ring, the mounting ring is located on one side of the damping spring sheet, a guide rod is arranged on the inner wall of the mounting ring, the moving support block is slidably arranged at the other end of the guide rod, the balance spring sheet is located between the mounting ring and the moving support block, and the other end of the moving support block is correspondingly arranged with the bearing.

[0014] Preferably, the balance spring sheet comprises a fixed end, an elastic pushing end and a balance moving end, the fixed end is fixedly connected with the mounting ring, the balance moving end is located on one side of the balance following end, the elastic pushing end is located between the fixed end and the balance moving end, and the elastic pushing end is protrusively and bendedly arranged towards the moving support block, and a movable groove is arranged in the middle of the elastic pushing end for the movement of the guide rod.

[0015] Preferably, the balance adjusting assembly is connected with the balance moving end, the balance adjusting assembly drives the balance moving end to move towards the balance following end, the elastic pushing end moves towards the moving support block, and the moving support block abuts against the bearing.

[0016] Preferably, the balance adjusting assembly comprises a mounting carrier plate, a sliding track and a balance driving rod, the mounting carrier plate is mounted on the side of the mounting ring, the sliding track is arranged on the mounting carrier plate, a balance driving piece is arranged in the sliding track, the balance driving piece is connected with the balance moving end, an arc-shaped gear rack is arranged in the balance driving piece, the arc-shaped gear rack is coaxially arranged with the sliding track, a balance driving gear is arranged on one side of the arc-shaped gear rack, the balance driving gear is located on the balance driving rod, the balance driving rod is rotationally connected with the surface of the partition plate and the front end cover, one end of the balance driving rod extends outside the front end cover and is provided with a knob.

[0017] A synchronous motor control method based on dynamic balance, adopts the permanent magnet synchronous motor.

[0018] (Three) beneficial effects

[0019] Compared with the prior art, the permanent magnet synchronous motor and the synchronous motor control method based on dynamic balance have the following beneficial effects:

[0020] 1. The permanent magnet synchronous motor, by energizing the permanent magnet synchronous motor, the armature in the machine shell starts to run, when the armature runs, the rotating shaft is driven to rotate, in the early stage of using the permanent magnet synchronous motor, the damping assembly supports the rotating shaft of the armature and the machine shell, so that the permanent magnet synchronous motor can be adjusted by the damping adjusting assembly when rotating at high speed, the elastic support degree of the damping assembly to the rotating shaft of the armature, so that the vibration frequency of the permanent magnet synchronous motor is reduced under high speed rotation, thereby reducing the vibration generated during operation; after the permanent magnet synchronous motor is used for a long time, due to the long-term work of the permanent magnet synchronous motor, the rotating shaft of the armature is mechanically unbalanced, thereby generating vibration and affecting the running stability of the whole machine, at this time, the balance adjusting assembly is used to elastically adjust the balance assembly on one side of the rotating shaft of the armature, so that the balance assembly on this side cooperates with the damping assembly to support and compensate the rotating shaft of the armature, offset the unbalanced force and vibration generated when the armature runs, thereby reducing the mechanical imbalance of the rotating shaft of the armature, realizing dynamic balance adjustment of the permanent magnet synchronous motor and increasing the service life of the permanent magnet synchronous motor.

[0021] 2、The permanent magnet synchronous motor, through the damping drive ring in damping assembly drive one end of damping spring sheet, adjust the bending degree of damping spring sheet, make damping spring sheet elastic support between damping drive ring and fixed support ring, further make the vibration frequency between the bearing at the armature shaft and the front end cover or the rear end cover reduce, further realize the damping effect; The positioning adjusting end in the damping spring sheet is driven by the damping drive ring, so that the positioning adjusting end moves away from or approaches the balance follow-up end, when the positioning adjusting end moves to the balance follow-up end, the balance follow-up end moves along the arc-shaped groove under the pushing of the positioning adjusting end, until the positioning adjusting end and the balance follow-up end are abutted at one end of the arc-shaped groove, the elastic support end between the positioning adjusting end and the balance follow-up end further protrudes and bends to the fixed support ring, and the elastic support force between the damping drive ring and the fixed support ring is increased; When the positioning adjusting end moves away from the balance follow-up end, the protruding state of the elastic support end between the positioning adjusting end and the balance follow-up end becomes gentle, and the elastic support force between the damping drive ring and the fixed support ring is reduced.

[0022] 3、The permanent magnet synchronous motor, through the fixed connection between the mounting ring in the balance assembly and the fixed support ring, the balance spring sheet inside the mounting ring leans against the mounting ring, supports or pushes the moving support block, when the bending amplitude of the balance spring sheet becomes larger, the balance spring sheet pushes the moving support block to move along the guide rod to the bearing direction, until the moving support block abuts against the bearing, with the balance spring sheet completing the amplitude continuously becoming larger, the elastic support force between the moving support block and the mounting ring becomes larger, and then the damping assembly supports and compensates one side of the bearing; The fixed end in the balance spring sheet makes one end of the balance spring sheet lean against the mounting ring, the balance moving end moves to the fixed end direction under the driving of the balance adjusting assembly, the bending amplitude of the elastic pushing end becomes larger, and then the moving support block can move along the guide rod to the bearing direction, when the bending amplitude of the elastic pushing end becomes larger, the movable slot in the middle of the elastic pushing end facilitates the movement of the guide rod relative to the balance moving end.

[0023] 4、The permanent magnet synchronous motor, through the balance adjusting assembly in the installation of the load plate installed in the installation ring, when the need for dynamic balance adjustment of the armature shaft, rotating balance drive rod driven balance drive gear, and then with the meshing arc-shaped rack driven balance drive piece in the sliding rail moves, balance drive piece in the installation of the load plate stable movement process, drive balance mobile end to the fixed end direction, so that the bending degree of the elastic pushing end becomes larger, and then push the moving support block to the bearing direction, and then cooperate with the damping adjusting assembly to the armature shaft for dynamic balance adjustment; when the permanent magnet synchronous motor shaft mechanical imbalance of this place is larger, continue to rotate the balance drive rod, so that the balance drive piece drive balance mobile end continues to move to the fixed end, at this time the balance mobile end and the balance follow-up end contact, and push the balance follow-up end to the direction of the positioning adjusting end, so that the elastic support end between the positioning adjusting end and the balance follow-up end bends larger, and then increases the support of the fixed support ring, that is, while the balance assembly is dynamically balanced, the damping assembly further strengthens the support of the bearing connected with the armature shaft. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a whole three-dimensional structure schematic diagram of the application;

[0025] Figure 2 It is a three-dimensional structure schematic diagram of the internal section of the application;

[0026] Figure 3 It is a three-dimensional structure schematic diagram of the internal section of the application;

[0027] Figure 4 It is a three-dimensional structure schematic diagram of the internal section of the application;

[0028] Figure 5 It is a three-dimensional structure schematic diagram of the dynamic balance mechanism of the application;

[0029] Figure 6 It is a three-dimensional structure schematic diagram of the dynamic balance mechanism of the application;

[0030] Figure 7 It is a three-dimensional structure schematic diagram of the dynamic balance mechanism of the application;

[0031] Figure 8 It is a three-dimensional structure schematic diagram of the damping assembly and the balance assembly of the application;

[0032] Figure 9 It is a three-dimensional structure schematic diagram of the damping assembly and the balance assembly of the application;

[0033] Figure 10 It is a three-dimensional structure schematic diagram of the damping assembly and the balance assembly of the application;

[0034] Figure 11 Figure 2 is a schematic diagram of the explosion plan structure of the damping assembly and the balancing assembly of the application.

[0035] In the figure: 1, machine body shell; 11, front end cover; 12, rear end cover; 13, heat dissipation fan blade; 14, partition plate; 15, fan cover; 2, armature; 21, bearing; 22, stator; 23, rotor; 3, damping assembly; 31, damping drive ring; 32, damping spring piece; 321, positioning and adjusting end; 322, elastic support end; 323, balance follow-up end; 33, fixed support ring; 331, arc-shaped groove; 4, balancing assembly; 41, mounting ring; 411, guide rod; 42, balancing spring piece; 421, fixed end; 422, elastic pushing end; 423, balance moving end; 424, movable groove; 43, moving support block; 5, damping adjusting assembly; 51, circular arc groove; 52, tooth; 53, damping drive gear; 54, damping drive rod; 6, balance adjusting assembly; 61, mounting carrier plate; 62, sliding track; 63, balance drive rod; 64, balance drive piece; 65, arc-shaped rack; 66, balance drive gear. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0037] Please refer to Figures 1-11 A permanent magnet synchronous motor comprises a machine body shell 1, the inside of the machine body shell 1 is provided with an armature 2, the armature 2 is provided with a dynamic balancing mechanism at both ends, the dynamic balancing mechanism comprises a damping assembly 3, a balancing assembly 4, a damping adjusting assembly 5 and a balance adjusting assembly 6, the damping assembly 3 is elastically supported between the machine body shell 1 and the rotating shaft of the armature 2, the balancing assembly 4 is in several groups, the balancing assembly 4 surrounds the rotating shaft of the armature 2, and the balancing assembly 4 is located at the inner ring on one side of the damping assembly 3, when the armature 2 shakes, the damping adjusting assembly 5 adjusts the elastic support degree of the damping assembly 3 to be smaller, the balance adjusting assembly 6 adjusts the expansion degree of the balancing assembly 4 between the inner ring on one side of the damping assembly 3 and the armature 2, and the balancing assembly 4 balances and compensates the support of the damping assembly 3 on the armature 2.

[0038] In use, by energizing the permanent magnet synchronous motor, the armature 2 in the machine body shell 1 starts to operate, and when the armature 2 operates, it drives the rotating shaft to rotate. In the early stage of use of the permanent magnet synchronous motor, the damping assembly 3 supports and dampens between the rotating shaft of the armature 2 and the machine body shell 1, so that the permanent magnet synchronous motor can rotate at high speed, and the degree of elastic support of the damping assembly 3 to the rotating shaft of the armature 2 is adjusted by the damping adjustment assembly 5, so that the vibration frequency of the permanent magnet synchronous motor is reduced at high speed, and the vibration generated during operation is reduced. After the permanent magnet synchronous motor is used for a long time, the mechanical imbalance of the rotating shaft of the armature 2 is caused by long-term work of the permanent magnet synchronous motor, and then vibration is generated, which affects the running stability of the whole machine. At this time, the balance assembly 4 on one side of the rotating shaft of the armature 2 is elastically adjusted by the balance adjustment assembly 6, so that the balance assembly 4 on the side cooperates with the damping assembly 3 to support and compensate the rotating shaft of the armature 2, offset the unbalanced force and vibration generated when the armature 2 operates, and then reduce the mechanical imbalance of the rotating shaft of the armature 2. The dynamic balance adjustment of the permanent magnet synchronous motor is realized, and the service life of the permanent magnet synchronous motor is increased.

[0039] Further, the machine body shell 1 is provided with a front end cover 11 and a rear end cover 12 at both ends respectively, the dynamic balance mechanism is located in the front end cover 11, the rear end cover 12 is provided with a heat dissipation fan blade 13 outside, the heat dissipation fan blade 13 is provided with a fan cover 15 outside, the fan cover 15 is sleeved on the rear end cover 12, the heat dissipation fan blade 13 is connected with the armature 2, the rotating shaft of the armature 2 is provided with a bearing 21, the bearing 21 is located in the front end cover 11, and the dynamic balance mechanism is located outside the bearing 21, the armature 2 comprises a stator 22 and a rotor 23, the stator 22 is connected with the machine body shell 1, the rotor 23 is rotatably arranged in the middle of the stator 22, the rotor 23 is rotatably connected with the front end cover 11 and the rear end cover 12 at both ends respectively, the machine body shell 1 is provided with a partition plate 14 at both sides respectively, the partition plate 14 is located in the front end cover 11 and the rear end cover 12 respectively, and the rotating shaft of the rotor 23 passes through the partition plate 14 at both ends respectively; The front end cover 11 and the rear end cover 12 provided at both ends of the machine body shell 1, and the partition plate 14 at the front end cover 11 and the rear end cover 12 protect the armature 2 in the machine body shell 1, and the dynamic balance mechanism at both ends of the armature 2 is installed on the partition plate 14. The heat dissipation fan blade 13 outside the rear end cover 12 is located outside the dynamic balance mechanism, and the heat dissipation fan blade 13 does not affect the adjustment and operation of the dynamic balance mechanism. When the armature 2 operates, the rotor 23 in the armature 2 is stably rotated in the middle of the stator 22 through the bearing 21.

[0040] Further, the damping assembly 3 comprises a damping driving ring 31, a damping spring sheet 32 and a fixed support ring 33, the fixed support ring 33 is fixedly connected with the inner wall of the front end cover 11, the damping driving ring 31 is connected with the bearing 21, the damping spring sheet 32 is located between the damping driving ring 31 and the fixed support ring 33, the balance assembly 4 is located on the side of the damping spring sheet 32, and the balance assembly 4 is located between the fixed support ring 33 and the bearing 21, and the damping adjusting assembly 5 is connected with the damping driving ring 31; one end of the damping spring sheet 32 is driven by the damping driving ring 31 in the damping assembly 3, the bending degree of the damping spring sheet 32 is adjusted, the damping spring sheet 32 is elastically supported between the damping driving ring 31 and the fixed support ring 33, and then the vibration frequency between the bearing 21 at the rotating shaft of the armature 2 and the front end cover 11 or the rear end cover 12 is reduced, and then the damping effect is realized.

[0041] Further, the damping spring sheet 32 comprises a positioning adjusting end 321, an elastic supporting end 322 and a balance follow-up end 323, the positioning adjusting end 321 is located on the damping driving ring 31, the fixed support ring 33 is provided with an arc-shaped groove 331, one side of the balance follow-up end 323 is located in the arc-shaped groove 331 and abuts against one end of the arc-shaped groove 331, the elastic supporting end 322 is located between the positioning adjusting end 321 and the balance follow-up end 323, and the elastic supporting end 322 is protrusively and bendedly arranged towards the fixed support ring 33, and the outer side of the elastic supporting end 322 is fixedly connected with the fixed support ring 33; the positioning adjusting end 321 in the damping spring sheet 32 is driven by the damping driving ring 31 to move away from or close to the balance follow-up end 323, when the positioning adjusting end 321 moves towards the balance follow-up end 323, the balance follow-up end 323 moves along the arc-shaped groove 331 under the pushing of the positioning adjusting end 321, until the balance follow-up end 323 abuts against one end of the arc-shaped groove 331, the elastic supporting end 322 between the positioning adjusting end 321 and the balance follow-up end 323 further protrudes and bends towards the fixed support ring 33, and the elastic supporting force between the damping driving ring 31 and the fixed support ring 33 is increased; when the positioning adjusting end 321 moves away from the balance follow-up end 323, the protrusion state of the elastic supporting end 322 between the positioning adjusting end 321 and the balance follow-up end 323 becomes gentle, and the elastic supporting force between the damping driving ring 31 and the fixed support ring 33 is reduced.

[0042] Further, the damping adjusting assembly 5 comprises a circular arc groove 51, the circular arc groove 51 is arranged on the damping driving ring 31, the inner wall of the circular arc groove 51 is provided with a tooth 52, the circular arc groove 51 is provided with a damping driving gear 53, the damping driving gear 53 is provided with a damping driving rod 54 at both ends, the damping driving rod 54 is rotatably connected with the surface of the partition plate 14 and the front end cover 11, one end of the damping driving rod 54 extends outside the front end cover 11 and is provided with a knob; through the circular arc groove 51 arranged on the damping driving ring 31, the tooth 52 arranged in the circular arc groove 51, under the driving of the damping driving rod 54, the damping driving gear 53 on the damping driving rod 54 drives the tooth 52 engaged with it, and drives the circular arc groove 51 to rotate, thereby making the damping driving ring 31 rotate, when the damping driving ring 31 rotates, the positioning adjusting end 321 on the damping spring sheet 32 moves relative to the balance follow-up end 323, thereby changing the bending degree of the elastic support end 322.

[0043] Further, the balance assembly 4 comprises a mounting ring 41, a balance spring sheet 42 and a moving support block 43, the mounting ring 41 is fixedly connected with the inner wall of the fixed support ring 33, the mounting ring 41 is located on one side of the damping spring sheet 32, the inner wall of the mounting ring 41 is provided with a guide rod 411, the moving support block 43 is slidably arranged at the other end of the guide rod 411, the balance spring sheet 42 is located between the mounting ring 41 and the moving support block 43, and the other end of the moving support block 43 is correspondingly provided with the bearing 21; through the fixed connection of the mounting ring 41 and the fixed support ring 33 in the balance assembly 4, the balance spring sheet 42 located in the inner side of the mounting ring 41 leans against the mounting ring 41 to support or push the moving support block 43, when the bending amplitude of the balance spring sheet 42 becomes larger, the balance spring sheet 42 pushes the moving support block 43 to move along the guide rod 411 to the direction of the bearing 21, until the moving support block 43 abuts against the bearing 21, as the amplitude of the balance spring sheet 42 continues to become larger, the elastic support force between the moving support block 43 and the mounting ring 41 becomes larger, thereby cooperating with the damping assembly 3 to support and compensate one side of the bearing 21.

[0044] Further, the balance spring sheet 42 comprises a fixed end 421, an elastic pushing end 422 and a balance moving end 423, the fixed end 421 is fixedly connected with the mounting ring 41, the balance moving end 423 is located on one side of the balance follow-up end 323, the elastic pushing end 422 is located between the fixed end 421 and the balance moving end 423, and the elastic pushing end 422 is protrusively and curvedly arranged towards the moving support block 43, and the elastic pushing end 422 is provided with a movable groove 424 in the middle for the movement of the guide rod 411; through the fixed end 421 in the balance spring sheet 42, one end of the balance spring sheet 42 leans against the mounting ring 41, the balance moving end 423 moves towards the fixed end 421 under the driving of the balance adjusting assembly 6, the bending amplitude of the elastic pushing end 422 is increased, and then the moving support block 43 can move along the guide rod 411 towards the bearing 21, when the bending amplitude of the elastic pushing end 422 is increased, the movable groove 424 provided in the middle of the elastic pushing end 422 facilitates the movement of the guide rod 411 relative to the balance moving end 423 (in fact, the balance moving end 423 moves towards the fixed end 421, that is, moves towards the guide rod 411, that is, the movement of the guide rod 411 relative to the balance moving end 423, the reference is different, and the state of the object is different).

[0045] Further, the balance adjusting assembly 6 is connected with the balance moving end 423, the balance adjusting assembly 6 drives the balance moving end 423 to move towards the balance follow-up end 323, the elastic pushing end 422 moves towards the moving support block 43, and the moving support block 43 abuts against the bearing 21; through the balance adjusting assembly 6 driving the balance moving end 423 to move, the balance moving end 423 moves relative to the fixed end 421, and then the bending degree of the elastic pushing end 422 is changed, so that the moving support block 43 moves, when the balance moving end 423 moves towards the fixed end 421, the elastic pushing end 422 pushes the moving support block 43 to move towards the bearing 21, so that the moving support block 43 abuts against the bearing 21.

[0046] Further, the balance adjusting assembly 6 comprises a mounting carrier plate 61, a sliding track 62 and a balance driving rod 63, the mounting carrier plate 61 is mounted on the side of the mounting ring 41, the sliding track 62 is arranged on the mounting carrier plate 61, the balance driving piece 64 is arranged in the sliding track 62, the balance driving piece 64 is connected with the balance moving end 423, the arc-shaped gear rack 65 is arranged in the balance driving piece 64, the arc-shaped gear rack 65 is coaxially arranged with the sliding track 62, the balance driving gear 66 is arranged on one side of the arc-shaped gear rack 65, the balance driving gear 66 is located on the balance driving rod 63, the balance driving rod 63 is rotationally connected with the surface of the partition plate 14 and the front end cover 11, one end of the balance driving rod 63 extends outside the front end cover 11 and is provided with a knob; when it is needed to dynamically balance the rotating shaft of the armature 2, the balance driving rod 63 is rotated to drive the balance driving gear 66, and then the arc-shaped gear rack 65 engaged with the balance driving gear 66 drives the balance driving piece 64 to move in the sliding track 62, during the stable movement of the balance driving piece 64 on the mounting carrier plate 61, the balance moving end 423 is driven to move towards the fixed end 421, so that the bending degree of the elastic pushing end 422 is increased, and then the moving support block 43 is pushed to move towards the bearing 21, and then the rotating shaft of the armature 2 is dynamically balanced by cooperating with the damping adjusting assembly 5; when the mechanical imbalance of the rotating shaft of the permanent magnet synchronous motor is large, the balance driving rod 63 is continuously rotated, so that the balance driving piece 64 drives the balance moving end 423 to continuously move towards the fixed end 421, at this time, the balance moving end 423 is in contact with the balance follow-up end 323 and pushes the balance follow-up end 323 to move towards the positioning adjusting end 321, so that the elastic support end 322 between the positioning adjusting end 321 and the balance follow-up end 323 is bent to a larger degree, and then the support of the fixed support ring 33 is increased, that is, while the balance assembly 4 dynamically balances, the damping assembly 3 further strengthens the support of the bearing 21 connected with the rotating shaft of the armature 2.

[0047] A synchronous motor control method based on dynamic balance, adopts the permanent magnet synchronous motor.

[0048] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A permanent magnet synchronous motor comprising a machine body housing, an armature is arranged inside the machine body housing, characterized in that: The dynamic balance mechanism is arranged at both ends of the armature, and comprises a damping assembly, a balance assembly, a damping adjustment assembly and a balance adjustment assembly. The balance assembly is arranged around the periphery of the armature rotating shaft, and the damping adjustment assembly adjusts the elastic support degree of the damping assembly when the armature shakes. The balance adjustment assembly adjusts the bending degree of the balance spring sheet in the balance assembly between the inner ring of the damping assembly and the armature, so as to push the moving support block to move towards the bearing of the armature, and the balance assembly balances and compensates the support of the damping assembly on the armature. The machine body shell is provided with a front end cover and a rear end cover at both ends respectively, the dynamic balance mechanism is located in the front end cover, the armature rotating shaft is provided with a bearing, the bearing is located in the front end cover, and the dynamic balance mechanism is located outside the bearing. The damping assembly comprises a damping driving ring, a damping spring sheet and a fixed support ring, the fixed support ring is fixedly connected with the inner wall of the front end cover, the damping driving ring is connected with the bearing, the damping spring sheet is located between the damping driving ring and the fixed support ring, the balance assembly is located on the side of the damping spring sheet, and the balance assembly is located between the fixed support ring and the bearing, and the damping adjustment assembly is connected with the damping driving ring. The damping spring sheet comprises a positioning adjustment end, an elastic support end and a balance follow-up end, the positioning adjustment end is located on the damping driving ring, an arc-shaped groove is formed in the fixed support ring, one side of the balance follow-up end is located in the arc-shaped groove and abuts against one end of the arc-shaped groove, the elastic support end is located between the positioning adjustment end and the balance follow-up end, and the elastic support end is protrusively and bendedly arranged towards the fixed support ring, and the outer side of the elastic support end is fixedly connected with the fixed support ring. The balance assembly comprises a mounting ring, a balance spring sheet and a moving support block, the mounting ring is fixedly connected with the inner wall of the fixed support ring, the mounting ring is located on one side of the damping spring sheet, a guide rod is arranged on the inner wall of the mounting ring, the moving support block is slidingly arranged at the other end of the guide rod, the balance spring sheet is located between the mounting ring and the moving support block, and the other end of the moving support block is correspondingly arranged with the bearing.

2. A permanent magnet synchronous motor according to claim 1, characterized in that: The rear end cover is provided with a heat dissipation fan blade outside, the heat dissipation fan blade is provided with a fan cover outside, the fan cover is sleeved on the rear end cover, the heat dissipation fan blade is connected with the armature, the armature comprises a stator and a rotor, the stator is connected with the machine body shell, the rotor is rotatably arranged in the middle part of the stator, the rotor is rotatably connected with the front end cover and the rear end cover at both ends respectively, the machine body shell is provided with a partition plate at both sides respectively, the partition plate is located in the front end cover and the rear end cover respectively, and the rotor passes through the partition plate at both ends respectively.

3. A permanent magnet synchronous motor according to claim 2, characterized in that: The damping adjusting assembly comprises a circular arc groove, which is arranged on the damping driving ring, and a gear is arranged on the inner wall of the circular arc groove; a damping driving gear is arranged in the circular arc groove; damping driving rods are arranged at both ends of the damping driving gear; the damping driving rods are rotatably connected to the surface of the partition plate and the front end cover; and a knob is arranged at one end of the damping driving rods.

4. A permanent magnet synchronous motor according to claim 2, characterized in that: The balance spring piece comprises a fixed end, an elastic pushing end and a balance moving end; the fixed end is fixedly connected to the mounting ring; the balance moving end is located on one side of the balance following end; the elastic pushing end is located between the fixed end and the balance moving end; the elastic pushing end is protrusively and curvedly arranged towards the moving support block; and a movable groove is arranged in the middle of the elastic pushing end for the movement of the guide rod.

5. A permanent magnet synchronous motor according to claim 4, characterized in that: The balance adjusting assembly is connected to the balance moving end; the balance adjusting assembly drives the balance moving end to move towards the balance following end; the elastic pushing end moves towards the moving support block; and the moving support block abuts against the bearing.

6. A permanent magnet synchronous motor according to claim 5, characterized in that: The balance adjusting assembly comprises a mounting carrier plate, a sliding track and a balance driving rod; the mounting carrier plate is mounted on the side surface of the mounting ring; the sliding track is arranged on the mounting carrier plate; a balance driving piece is arranged in the sliding track; the balance driving piece is connected to the balance moving end; an arc-shaped gear rack is arranged in the balance driving piece; the arc-shaped gear rack is coaxially arranged with the sliding track; a balance driving gear is meshingly arranged on one side of the arc-shaped gear rack; the balance driving gear is located on the balance driving rod; the balance driving rod is rotatably connected to the surface of the partition plate and the front end cover; and a knob is arranged at one end of the balance driving rod.

7. A method of controlling a synchronous machine based on dynamic balance, characterized in that The permanent magnet synchronous motor is adopted in any one of claims 1-6.

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