Permanent magnet speed regulator with mobile magnetic steel

Abstract

A kind of permanent magnet speed regulator of mobile magnetic steel, including conductor rotor, permanent magnet rotor, axial moving magnetic flux adjusting mechanism, there is radial gap between the conductor rotor and the permanent magnet rotor;Conductor rotor rotates with first transmission shaft synchronously;Permanent magnet rotor rotates with second transmission shaft synchronously;Permanent magnet rotor includes permanent magnet rotor fixed part and permanent magnet rotor moving part, fixed magnetic group is set on permanent magnet rotor fixed part, and mobile magnetic group is set on permanent magnet rotor moving part;The axial moving magnetic flux adjusting mechanism includes moving mechanism, and the permanent magnet rotor moving part is connected with the moving mechanism;Moving mechanism drives permanent magnet rotor moving part to move axially, and mobile magnetic group is axially inserted or removed from fixed magnetic group;Whole adjusting structure is simpler, and size is smaller, axial moving mechanism is simple, and it is convenient to maintain in practical application.

Description

Technical Field

[0001] This invention belongs to the field of permanent magnet speed regulation technology, and particularly relates to a permanent magnet speed regulator for a movable magnet. Background Technology

[0002] In large-scale mining, petrochemical, power, and metallurgical industries, permanent magnet speed controllers are increasingly widely used due to the need for energy conservation and environmental protection. Permanent magnet speed controllers can adapt to various harsh environments, including those with large grid voltage fluctuations, severe harmonics, flammable and explosive environments, humidity, and dust. They can adjust the load speed online to meet the actual operating needs of the system, achieving speed regulation and energy saving, with a speed range of 0-98% and an energy saving rate of 10%-65%. During operation, the motor drives the conductor rotor of the permanent magnet speed controller to rotate. The copper conductors on the conductor rotor cut the magnetic field lines emitted by the permanent magnets on the permanent magnet rotor, generating eddy currents. These eddy currents generate an induced magnetic field, which couples with the source magnetic field of the permanent magnet, thus generating torque, causing the permanent magnet rotor to drive the load. Because permanent magnet speed regulation technology is simple, reliable, has a long service life, and has no electromagnetic interference problems, it is gradually replacing speed controllers in many challenging environments.

[0003] Existing permanent magnet speed controllers mainly include cylindrical permanent magnet speed controllers and disc-type permanent magnet speed controllers. Cylindrical speed controllers adjust the relative position of the cylindrical permanent magnet rotor and the cylindrical conductor rotor along the axial direction to change the effective coupling portion of the permanent magnet rotor and conductor rotor, thereby adjusting the torque. This requires a large axial space to facilitate relative axial movement between the permanent magnet rotor and conductor rotor. Disc-type permanent magnet speed controllers adjust torque by adjusting the air gap between the disc-type permanent magnet rotor and conductor rotor, thereby achieving speed regulation of the load. Similarly, they require a large axial space for air gap adjustment, resulting in large axial dimensions and significant inconvenience for on-site modifications. Furthermore, during speed regulation, the permanent magnet rotor needs to move, leading to long cantilever arms, significant vibration, easy bearing damage, and poor equipment reliability. During adjustment, the large mass and rotational inertia of the permanent magnet rotor make it susceptible to impact; excessive load on the adjustment device and bearings can easily damage it; the equipment experiences significant vibration, high heat generation, and the permanent magnet is prone to failure; simultaneously, adjusting the air gap requires overcoming the significant magnetic attraction. All of these factors make them difficult to apply in space-constrained environments. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, this invention addresses the problem of large axial forces that need to be overcome when adjusting the moving permanent magnet rotor in a permanent magnet speed controller. It provides a moving permanent magnet speed controller with a simpler adjustment structure and smaller size. At the same time, it does not require moving the entire equipment structure, so that the center of mass and installation position of the equipment always remain fixed.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] A permanent magnet speed regulator for a movable magnet includes a conductor rotor, a permanent magnet rotor, and an axial moving magnetic flux adjustment mechanism, wherein there is a radial gap between the conductor rotor and the permanent magnet rotor; characterized in that the conductor rotor rotates synchronously with a first transmission shaft; the permanent magnet rotor rotates synchronously with a second transmission shaft; the permanent magnet rotor includes a permanent magnet rotor fixed part and a permanent magnet rotor moving part, a fixed magnetic group is provided on the permanent magnet rotor fixed part, and a moving magnetic group is provided on the permanent magnet rotor moving part; the axial moving magnetic flux adjustment mechanism includes a moving mechanism, and the permanent magnet rotor moving part is connected to the moving mechanism; the moving mechanism drives the permanent magnet rotor moving part to move axially, and the moving magnetic group axially inserts into or moves out of the fixed magnetic group.

[0007] Furthermore, the axial moving magnetic flux adjustment mechanism achieves axial movement through a moving mechanism having a drive unit and a pull rod. The permanent magnet rotor moving part is mounted on the pull rod, and the pull rod slides axially relative to the second transmission shaft, thereby causing the permanent magnet rotor moving part to move axially.

[0008] Furthermore, the conductor rotor is cylindrical and fixed to the first transmission shaft connecting sleeve, which is cylindrical and fitted onto the first transmission shaft; the conductor rotor has annular copper conductors.

[0009] Furthermore, the permanent magnet rotor fixing part is cylindrical and fixed on the second transmission shaft connecting sleeve. The second transmission shaft connecting sleeve is cylindrical and is fitted on the second transmission shaft. The circumference of the cylindrical part of the permanent magnet rotor fixing part is a permanent magnet fixing ring. Several magnet receiving cavities are evenly distributed along the circumference inside the permanent magnet fixing ring. The magnets on the permanent magnet fixing ring are arranged at intervals in several magnet receiving cavities, and there is an empty magnet receiving cavity between two adjacent magnets.

[0010] Furthermore, the permanent magnet rotor moving part is cylindrical, and the circumference of the cylindrical part is a permanent magnet moving ring. Magnets are evenly distributed along the circumference on the outer side of the permanent magnet moving ring. The magnets on the permanent magnet moving ring correspond to the empty magnet receiving cavity on the permanent magnet fixed ring. When the permanent magnet rotor moving part moves axially, the magnets on the permanent magnet moving ring are inserted into or removed from the empty magnet receiving cavity on the permanent magnet fixed ring.

[0011] Furthermore, the second drive shaft is a hollow shaft, and the pull rod of the moving mechanism is located in the central hollow part of the second drive shaft.

[0012] Furthermore, a pull plate is fixedly installed on one end of the pull rod, and the pull plate is connected to the end plane of the permanent magnet rotor moving part through the guide rod.

[0013] Furthermore, the drive unit adopts a hydraulic drive method, including a hydraulic cylinder; the other end of the pull rod is connected to the hydraulic cylinder, which is located at the end of the second drive shaft.

[0014] Furthermore, the pull plate and the moving part of the permanent magnet rotor are located on both sides of the fixed part of the permanent magnet rotor, and the guide rod passes through the opening on the connecting plate of the permanent magnet rotor.

[0015] Furthermore, the number of magnets in the fixed magnetic group and the moving magnetic group of the permanent magnet rotor is the same; the magnets in the fixed magnetic group are magnetized in the same direction, up and down; the magnets in the moving magnetic group are magnetized in the opposite direction, up and down.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The hydraulic drive makes the adjustment structure simpler and the size smaller. At the same time, it does not require moving the overall equipment structure, so that the center of mass and installation position of the equipment always remain fixed.

[0018] 2. Improved safety and reliability of the speed regulation process, making the product equipment more stable and reliable, and enabling arbitrary adjustment of the load speed from zero speed to the conductor rotor speed. Attached Figure Description

[0019] Figure 1 This is a structural diagram of a permanent magnet speed controller;

[0020] Figure 2 A schematic diagram of the axial gap between the conductor rotor and the permanent magnet rotor;

[0021] Figure 3 Schematic diagram of a conductor rotor;

[0022] Figure 4 Schematic diagram of a permanent magnet rotor;

[0023] Figure 5 This is a schematic diagram of the motor's axial direction.

[0024] Figure 6 This is a 3D schematic diagram of the tie rod.

[0025] The components include: 1. Load (motor) shaft; 2. Key; 3. Load (motor) connecting sleeve; 4. Bolt; 5. Conductor rotor connecting disc; 6. Bolt; 7. Conductor rotor sleeve; 8. Screw; 9. Copper conductor ring; 10. Gland; 11. Bolt; 12. Permanent magnet moving ring magnet; 13. Bolt; 14. Washer; 15. Nut; 16. Movable magnet connecting disc; 17. Inner back iron ring; 18. Motor (load); 19. Bolt; 20. Hydraulic cylinder; 21. Rotary... 21. Connector; 22. Sliding sleeve; 23. Pull rod; 24. Nut; 25. Guide sleeve; 26. Key; 27. Permanent magnet rotor connecting sleeve; 28. Guide rod; 29. ​​Sliding sleeve; 30. Sliding sleeve; 31. Pull plate; 32. Nut; 33. Nut; 34. Permanent magnet rotor connecting disc; 35. Bolt; 36. Fixed magnet; 37. Permanent magnet rotor permanent magnet fixing ring; 38. Motor (load) shaft; 39. Piston plate; 40. Sealing ring; 41. Permanent magnet rotor permanent magnet moving ring. Detailed Implementation

[0026] The technical solution of the present invention will now be described in detail with reference to the accompanying drawings.

[0027] like Figure 1 As shown, this invention provides a mobile permanent magnet speed controller, comprising a conductor rotor and a permanent magnet rotor. Figure 3 As shown, the conductor rotor is cylindrical and is fixed to the connecting sleeve 3 by bolts. The connecting sleeve 3 is cylindrical with a raised disc-shaped structure at one end. The conductor rotor is fixed to the raised disc-shaped structure of the connecting sleeve 3 by bolts. The connecting sleeve 3 is fitted onto the load shaft 1 (or motor shaft) and fixedly connected by a key. The conductor rotor rotates synchronously with the load shaft.

[0028] The conductor rotor consists of a disc-shaped conductor rotor connecting disc 5, a conductor rotor sleeve 7, and a copper conductor ring 9. The conductor rotor connecting disc 5 is disc-shaped with a hole in the middle and is fitted onto the connecting sleeve 3. The conductor rotor sleeve 7 is cylindrical, and its end is fixedly connected to the outer periphery of the conductor rotor connecting disc 5 by bolts. The copper conductor ring 9 is cylindrical and is fixedly connected to the inner wall of the conductor rotor sleeve 7 by bolts.

[0029] like Figure 4 As shown, the permanent magnet rotor includes a permanent magnet rotor fixed part and a permanent magnet rotor moving part.

[0030] The permanent magnet rotor fixing part is cylindrical and consists of a permanent magnet rotor connecting disk 34 and a permanent magnet fixing ring 37. The circumference of the cylindrical fixing part is the permanent magnet fixing ring, and magnets 36 are evenly distributed along the circumference inside the permanent magnet fixing ring. The end face of the permanent magnet fixing ring is fixed to the disc-shaped permanent magnet rotor connecting disk 34. Figure 2 As shown, several magnet housing cavities are evenly distributed along the circumference inside the permanent magnet fixing ring. The magnets on the permanent magnet fixing ring are arranged at intervals in several magnet housing cavities. There is an empty magnet housing cavity between two adjacent magnets 36. The magnet group on the permanent magnet fixing ring is called the fixed magnet group.

[0031] The permanent magnet rotor connecting disc 34 has a hole at its center that mates with the outer surface of the connecting sleeve 27. The connecting sleeve 27 is cylindrical and has a raised disc-shaped structure at one end. The permanent magnet rotor connecting disc 34 is fixed to the raised disc-shaped structure of the connecting sleeve 27 by bolts. The connecting sleeve 27 is fitted onto the motor shaft (or load shaft) and fixedly connected by a key. The permanent magnet rotor rotates synchronously with the motor shaft.

[0032] The permanent magnet rotor moving part is cylindrical and consists of a movable magnet connecting plate 16 and a permanent magnet moving ring 41. The circumference of the cylindrical moving part is the permanent magnet moving ring 41. Magnets 12 are evenly distributed along the circumference on the outer side of the permanent magnet moving ring. The magnets 12 on the permanent magnet moving ring correspond to the empty magnet receiving cavities on the permanent magnet fixed ring. The permanent magnet moving part can move axially. The magnet assembly on the permanent magnet moving ring is called the moving magnet assembly. The moving magnet assembly can be inserted into and removed from the fixed magnet assembly.

[0033] The end face of the permanent magnet moving ring 41 is fixed on the disc-shaped movable magnet connecting plate 16.

[0034] An air gap exists between the conductor rotor and the permanent magnet rotor.

[0035] The permanent magnet rotor moving part is fixedly connected to the axial moving mechanism. The movable magnet connecting plate 16 has an opening at its center and is equipped with a guide sleeve 25. The guide sleeve 25 is fitted with the outer surface of the permanent magnet rotor connecting sleeve 27 to guide the axial movement of the permanent magnet rotor moving part.

[0036] The moving mechanism is hydraulically driven and includes a pull rod 23. The pull rod 23 is cylindrical. One end is fixed to a pull plate 31, which is disc-shaped or has another structural shape. A hole is opened at the center of the pull plate 31 to fit over the end of the pull rod 23, and it is secured with a nut. Holes are evenly distributed around the perimeter of the pull plate 31 for mounting and fixing one end of a guide rod 28. The other end of the guide rod 28 is fixedly mounted to a hole on the movable magnetic connecting plate 16. When the pull rod 23 moves axially, it drives the permanent magnet rotor to move axially as well.

[0037] Pull plate 31 and movable magnet connecting plate 16 are located on both sides of permanent magnet rotor fixing part. Permanent magnet rotor connecting plate 34 has a hole and a sliding sleeve 29 is installed. The sliding sleeve 29 is used for guide rod 28 to pass through and guide.

[0038] like Figure 5 As shown, the motor shaft adopts a hollow shaft structure, and the tie rod 23 passes through the internal cavity of the motor shaft and is arranged coaxially. The two ends of the tie rod 23 are respectively installed with the motor shaft via guide components, allowing the tie rod 23 to slide left and right relative to the motor shaft. The guide components consist of sliding sleeves 30, which are embedded in the hollow end of the motor shaft. The tie rod 23 and the sliding sleeves 30 are fitted with a clearance, allowing for free sliding. The two sliding sleeves 30 are located at the two outlet ends of the motor shaft, corresponding to the two ends of the tie rod 23.

[0039] A hydraulic cylinder 20 is also installed at the outlet end of one side of the motor shaft. The hydraulic cylinder 20 is cylindrical, with one end closed and the other end having a round hole that mates with the pull rod 23, and is fixed to the outlet end of the motor shaft. The pull rod 23 passes through the round hole and extends into the inside of the hydraulic cylinder.

[0040] A piston plate 39, disc-shaped, is mounted on the end of the pull rod 23 inside the hydraulic cylinder 20, and mates with the inner cavity of the hydraulic cylinder 20. The inner cavity of the hydraulic cylinder 20 forms a working oil chamber, in which the pull rod 23 slides. The working oil chamber is divided into left and right oil chambers by the disc-shaped piston plate of the pull rod 23, each connected to pressurized oil. Under the action of oil pressure, the pull rod 23 slides left and right, driving the connected magnetic yoke component to move axially left and right.

[0041] A sealing ring 40 is installed on the mounting surface of the piston plate 39 and the inner cavity of the cylinder 20. A sealing ring is installed on the mounting surface of the end hole of the cylinder 20 and the outer circumference of the pull rod 23. When the pull rod 23 moves under hydraulic pressure, it drives the guide rod 28 to move left and right through the pull plate 31, thereby driving the magnetic yoke component mounted on it to move left and right relative to the permanent magnet rotor.

[0042] A rotary joint 21 is installed on the closed end of the cylinder 20. The two working oil chambers of the cylinder 20 are connected to hydraulic oil pipes via the rotary joint 21, and are also connected to external hydraulic devices to provide hydraulic oil to enter and exit the left and right oil chambers.

[0043] The axial moving mechanism is coaxially arranged with the permanent magnet rotor.

[0044] The permanent magnet rotor has a fixed magnetic group on its permanent magnet fixed ring and a movable magnetic group on its movable fixed ring.

[0045] The fixed magnetic assembly is installed inside the conductor rotor, remaining axially stationary and fully coupled to it. The movable magnetic assembly and movable connecting magnetic disk are fixed and installed inside the conductor rotor, allowing axial movement along direction V. The movable magnetic assembly is installed inside the conductor rotor and can move axially. The number of magnets in the fixed and movable magnetic assemblies of the permanent magnet rotor is the same. The magnets in the fixed magnetic assembly are magnetized vertically in the same direction. The magnets in the movable magnetic assembly are magnetized vertically in the opposite direction to those in the fixed magnetic assembly. In other words, the magnetization direction of the permanent magnet fixed assembly is opposite to that of the permanent magnet movable assembly. By axially moving the permanent magnet movable assembly, its magnets can be fully inserted into or completely removed from the permanent magnet fixed assembly.

[0046] Example:

[0047] The mobile permanent magnet speed controller of this embodiment includes a cylindrical conductor rotor, a permanent magnet rotor fixing part disposed on the inner circumference of the cylindrical conductor rotor, and an axial moving mechanism that drives the permanent magnet rotor moving part to move relative to the permanent magnet rotor fixing part.

[0048] A cylindrical conductor rotor is mounted on a load shaft via a load coupling, and a copper conductor ring is installed on the outer circumference of the cylindrical conductor rotor. A permanent magnet rotor is mounted on a motor drive shaft via a motor coupling, and permanent magnets are uniformly distributed circumferentially inside the permanent magnet rotor. An air gap exists between the conductor rotor and the permanent magnet rotor, preventing direct contact. An axial movement mechanism is coaxially mounted with the permanent magnet rotor; the axial movement mechanism drives the moving part of the permanent magnet rotor to move axially.

[0049] An external drive mechanism is provided, which drives the cylinder rod through hydraulic oil to control the axial movement of the axial movement mechanism. The external drive mechanism can be pneumatic, hydraulic, or a servo motor or stepper motor with more precise control, or it can be manually adjusted. Any electric or non-electric control structure that can realize the present invention is within the scope of protection of the present invention.

[0050] In practical applications, the connecting sleeve 3 is fitted onto the load shaft 1 and connected by the key 2, allowing torque to be transmitted to the load. The end face of the conductor rotor is fitted onto the connecting sleeve 3, and the conductor rotor and the connecting sleeve 3 are rigidly connected by bolts.

[0051] External hydraulic oil enters the cylinder 20, and the pull rod 23 moves axially under the push of the hydraulic oil, realizing the left and right axial movement of the permanent magnet rotor moving part.

[0052] The gap (air gap) between the permanent magnet rotor and the conductor rotor forms a magnetic field, and the magnetic field generated by the magnets in the permanent magnet moving ring affects the magnetic flux of the magnetic field between the permanent magnet rotor and the conductor rotor.

[0053] The axial movement of the permanent magnet moving ring can change the magnetic field between the permanent magnet rotor and the conductor rotor.

[0054] When the permanent magnet moving ring is fully inserted into the permanent magnet fixed ring of the permanent magnet rotor, the magnetic induction intensity between the conductor rotor and the permanent magnet rotor is at its maximum. When the permanent magnet moving ring is completely removed from the permanent magnet fixed ring of the permanent magnet rotor, the magnetic induction intensity between the conductor rotor and the permanent magnet rotor is at its minimum. After the permanent magnet moving ring is completely removed from the permanent magnet fixed ring of the permanent magnet rotor, the motor starts, and the permanent magnet rotor rotates with the motor, which can achieve soft-start load.

[0055] As the permanent magnet moving ring axially moves outward from the permanent magnet fixed ring of the permanent magnet rotor, the magnetic flux between the conductor rotor and the permanent magnet rotor decreases, and the magnetic induction intensity of the magnets weakens. Conversely, as the permanent magnet moving ring axially inserts inward from the outside of the permanent magnet fixed ring along the V-axis, the magnetic flux between the conductor rotor and the permanent magnet rotor increases, and the magnetic induction intensity of the magnets strengthens. The conductor rotor rotates with the permanent magnet rotor, and there is a speed difference between them. When the permanent magnet moving ring is fully inserted into the permanent magnet fixed ring of the permanent magnet rotor, the magnetic flux between the conductor rotor and the permanent magnet rotor is at its maximum, the eddy current induction intensity on the conductor surface is strongest, the conductor rotor transmits the highest torque, and the rotational speed is highest.

[0056] As the permanent magnet moving ring axially moves outward from the permanent magnet fixed ring of the permanent magnet rotor, the magnetic induction intensity between the conductor rotor and the permanent magnet rotor continuously weakens. Conversely, as the permanent magnet moving ring axially inserts inward from the outside of the permanent magnet fixed ring of the permanent magnet rotor, the magnetic induction intensity between the conductor rotor and the permanent magnet rotor continuously strengthens. The torque transmitted by the conductor rotor increases with increasing conductor rotor speed and decreases with decreasing conductor rotor speed. When maximum torque transmission is required, the permanent magnet moving ring must be fully inserted into the permanent magnet fixed ring of the permanent magnet rotor. When a soft start is required, the permanent magnet moving ring must be completely removed from the permanent magnet fixed ring of the permanent magnet rotor.

[0057] The relative positions of the conductor rotor and the permanent magnet rotor remain unchanged, and no axial force is generated. Soft start is possible.

[0058] The magnetic field tension between the permanent magnet rotor and the yoke ring can be canceled out by the transmission elements of the moving mechanism. It does not exert force on the motor or the load.

[0059] Finally, it should be noted that the above description is merely an explanation of the present invention and is not intended to limit the invention. Although the present invention has been described in detail, those skilled in the art can still modify the technical solutions described above or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A permanent magnet speed regulator for a movable magnet, comprising a conductor rotor, a permanent magnet rotor, and an axial movement flux adjustment mechanism, wherein a radial gap exists between the conductor rotor and the permanent magnet rotor; characterized in that, The conductor rotor rotates synchronously with the first drive shaft; the permanent magnet rotor rotates synchronously with the second drive shaft; the permanent magnet rotor includes a fixed part and a movable part, a fixed magnetic group is provided on the fixed part, and a movable magnetic group is provided on the movable part; the axial movement magnetic flux adjustment mechanism includes a moving mechanism, and the movable part of the permanent magnet rotor is connected to the moving mechanism; the moving mechanism drives the movable part of the permanent magnet rotor to move axially, and the movable magnetic group is axially inserted into or removed from the fixed magnetic group; the axial movement magnetic flux adjustment mechanism realizes axial movement through a moving mechanism with a drive unit and a pull rod, the movable part of the permanent magnet rotor is mounted on the pull rod, and the pull rod slides axially relative to the second drive shaft, thereby causing the movable part of the permanent magnet rotor to move axially; The permanent magnet rotor fixing part is cylindrical and fixed on the second drive shaft connecting sleeve. The second drive shaft connecting sleeve is cylindrical and is fitted on the second drive shaft. The circumference of the cylindrical part of the permanent magnet rotor fixing part is a permanent magnet fixing ring. Several magnet receiving cavities are evenly distributed along the circumference inside the permanent magnet fixing ring. The magnets on the permanent magnet fixing ring are arranged at intervals in several magnet receiving cavities. There is an empty magnet receiving cavity between two adjacent magnets. The permanent magnet rotor moving part is cylindrical, and the circumference of the cylindrical part is a permanent magnet moving ring. Magnets are evenly distributed along the circumference on the outer side of the permanent magnet moving ring. The magnets on the permanent magnet moving ring correspond to the empty magnet receiving cavity on the permanent magnet fixed ring. When the permanent magnet rotor moving part moves axially, the magnets on the permanent magnet moving ring are inserted into or removed from the empty magnet receiving cavity on the permanent magnet fixed ring.

2. The permanent magnet speed regulator for a movable magnet according to claim 1, characterized in that, The conductor rotor is cylindrical and fixed to the first drive shaft connecting sleeve, which is cylindrical and fitted onto the first drive shaft; the conductor rotor has annular copper conductors.

3. The permanent magnet speed regulator for a movable magnet according to claim 1, characterized in that, The second drive shaft is a hollow shaft, and the pull rod of the moving mechanism is located in the central hollow part of the second drive shaft.

4. The permanent magnet speed regulator for a movable magnet according to claim 3, characterized in that, A pull plate is fixedly installed on one end of the pull rod, and the pull plate is connected to the end plane of the permanent magnet rotor moving part through the guide rod.

5. The permanent magnet speed regulator for a movable magnet according to claim 4, characterized in that, The drive unit is hydraulically driven and includes a hydraulic cylinder; the other end of the pull rod is connected to the hydraulic cylinder, which is located at the end of the second drive shaft.

6. The permanent magnet speed regulator for a movable magnet according to claim 4, characterized in that, The pull plate and the moving part of the permanent magnet rotor are located on both sides of the fixed part of the permanent magnet rotor, and the guide rod passes through the opening on the connecting plate of the permanent magnet rotor.

7. The permanent magnet speed regulator for a movable magnet according to claim 1, characterized in that, The number of magnets in the fixed magnetic group and the moving magnetic group of the permanent magnet rotor is the same; the magnets in the fixed magnetic group are magnetized in the same direction, both vertically. The magnets in the movable magnetic assembly are magnetized vertically, which is opposite to the direction of the fixed magnetic assembly.

Images