A high-voltage permanent magnet intelligent drive system for a water conservancy vertical shaft

Abstract

The present invention discloses a high-voltage permanent magnet intelligent drive system for a water conservancy shaft, which includes a housing, a stator assembly, a rotor assembly, and a high-power permanent magnet motor driver. The length-diameter ratio of the rotor is ≥11 and ≤20. The rotor assembly includes two rotor units that are coaxially arranged and sleeved on the same rotor shaft. A magnetic isolation spacer is provided between the two rotor units, and the two rotor units and the magnetic isolation spacer are closely adjacent to each other. The beneficial effects of the present invention are as follows: It provides a slender-structured, low-speed, high-torque, high-voltage permanent magnet intelligent drive system suitable for the water conservancy shaft environment, and solves the problems of high energy consumption, easy damage of the speed reducer, short maintenance cycle, high maintenance cost, high noise and vibration of the drive system, and space limitation of the shaft.

Description

Technical Field

[0001] The present invention belongs to the technical category of special motors for water conservancy shafts in the manufacturing technology field of permanent magnet motors, and particularly relates to a high-voltage permanent magnet intelligent drive system for a water conservancy shaft. Background Art

[0002] Currently, the structure of the high-voltage large-torque shaft pump drive system is a high-voltage asynchronous motor plus a coupling plus a speed reducer plus a coupling plus an impeller. The asynchronous motor has advantages such as simple structure, high reliability, and relatively simple control system. However, the asynchronous motor has low efficiency and power factor in terms of performance, which is not conducive to improving the working efficiency of the entire system and reducing costs. At the same time, the asynchronous motor is slender in structure, especially the concentricity level of the rotor needs to reach above level 3 to suppress the large vibration problem of the submersible pump system caused by the large concentricity due to cumulative errors. Therefore, there are certain risks in processing and manufacturing, which increases the failure rate and maintenance times of the unit.

[0003] In order to solve the above problems, a high-voltage large-torque shaft pump drive system has been developed. Compared with the asynchronous motor, the high-voltage large-torque shaft pump drive system has the following advantages:

[0004] 1. The rotor of the high-voltage large-torque shaft pump drive system rotates at a synchronous speed, and the losses on the rotor are much smaller than those of the asynchronous motor. The permanent magnet motor uses permanent magnets for excitation, and the proportion of the reactive component in the current is relatively small. There is no excitation loss, slip loss, and rotor loss. The power factor of the permanent magnet motor is also relatively high. Therefore, the permanent magnet motor is more energy-efficient and has a high power factor characteristic that can improve the quality of the power grid.

[0005] 2. The asynchronous motor has the problem of slip. If the speeds of several motors are different, it will bring internal stress and also affect the accuracy of the control system, causing local overheating and seriously affecting the motor life. Since the motor speed of the permanent magnet synchronous motor strictly follows the synchronous speed, there is no speed difference between each motor, which can effectively solve the negative impact brought by segmentation.

[0006] Due to the limitation of the outer diameter size of the motor, the asynchronous motor cannot be made into multiple poles and has a relatively high speed, which leads to an increase in the failure points of the system, a decrease in efficiency, an increase in complexity, and an increase in the production and maintenance costs of the system. The permanent magnet motor can be made into a slot-pole combination with fewer slots and more poles, and the performance of the motor is good. The rated speed of the motor can be designed very low, which can achieve direct drive of the shaft pump, improve the efficiency of the system, reduce the failure rate of the system, and save production costs.

[0007] However, the rotor shafts of current high-pressure and high-torque shaft well pump drive systems are all assembled shafts. The rotors are respectively placed on the rotor shafts, and then the rotor shafts are assembled. In order to ensure the coaxiality between the rotor shafts, a great deal of effort is required for adjustment, which has extremely high requirements for assembly. Moreover, it is difficult to ensure the coaxiality between the rotor shafts even after the adjustment is completed.

[0008] In view of the above problems, Chinese Utility Model Patent CN201821173356.5 discloses an ultra-slender and high-efficiency permanent magnet synchronous motor for downhole barrel-type operations, which includes a housing, a stator assembly, a rotor assembly, and a rotor shaft; the rotor shaft is a integral shaft; the rotor assembly includes a plurality of unit rotors, and each unit rotor includes a rotor core and permanent magnets arranged on the rotor core. Each unit rotor is coaxially connected to the rotor shaft with its rotor core, and bearings are arranged between adjacent unit rotors; the stator assembly includes a coil winding, as well as stator silicon steel punching sheets and stator copper punching sheets whose sizes match the slot types. The length of the silicon steel core is equal to the length of the rotor core, and the width of the stator copper punching sheet is equal to the width of the bearing. They are all fastened to the inner wall of the housing. Among them, each unit rotor includes a rotor core and permanent magnets arranged on the rotor core. Each unit rotor is coaxially connected to the rotor shaft with its rotor core, and bearings are arranged between adjacent unit rotors. Such a structure increases the structural components of the rotor, increases the assembly difficulty, and increases the failure rate of the rotor.

[0009] To sum up, in order to solve the problems of high energy consumption of the above-mentioned motor, great assembly difficulty, easy damage of the speed reducer, short maintenance cycle, high maintenance cost, large noise and vibration of the drive system, and space limitation of the shaft well, and to realize the intelligent drive ability under the space limitation conditions in the shaft well, there is an urgent need for a high-voltage permanent magnet intelligent drive system for hydraulic shaft wells to achieve this. Summary of the Invention

[0010] To overcome the above-mentioned defects of the prior art, the present invention provides a high-voltage permanent magnet intelligent drive system for hydraulic shaft wells.

[0011] The specific technical solution adopted by the present invention is as follows:

[0012] A high-voltage permanent magnet intelligent drive system for hydraulic shaft wells includes a housing, a stator assembly, a rotor assembly, and a high-power permanent magnet motor driver. The length-diameter ratio of the rotor is ≥11 and ≤20. The rotor assembly includes two rotor units that are coaxial with each other and sleeved on the same rotor shaft. A magnetic isolation spacer is arranged between the two rotor units, and the two rotor units and the magnetic isolation spacer are closely adjacent to each other;

[0013] Each rotor unit includes a rotor bracket, a magnetic isolation sleeve, a pole core, and a permanent magnet. A magnetic isolation sleeve is sleeved on the rotor bracket. Pole cores are mounted on the outer cylindrical surface of each magnetic isolation sleeve. A permanent magnet mounting groove is provided between adjacent pole cores, and a permanent magnet is fixed in the permanent magnet mounting groove. The magnetic isolation sleeve is divided into an inner magnetic isolation layer and an outer fixing layer, and the material of the outer fixing layer is a magnetostrictive material;

[0014] The stator assembly includes a coil winding and a stator core formed by laminating sector-ring-shaped pole laminations. The stator core has the same length as the pole cores of the rotor and is evenly distributed along the inner wall circumference of the housing;

[0015] The high-power permanent magnet motor driver is fixed on the outer wall of the machine shell and is connected to the motor through a junction box.

[0016] With such a design, a 2500kw high-voltage permanent magnet intelligent drive system is provided for the water conservancy shaft, meeting the requirements of a 10000V high-voltage power supply condition. It is energy-saving, efficient, safe and reliable. The design of the slender rotor has a simple structure, enabling the motor to significantly reduce its volume, save space, and meet the actual on-site needs; it is more than 20% energy-saving compared with an asynchronous motor; the design of the double rotor has a simple structure and is easy to install. With an anti-leakage magnetic structure, the leakage magnetic flux of the entire magnetic circuit is small, enabling the full utilization of the magnetic properties of the permanent magnet. Compared with similar products, 5%-10% of the permanent magnet material is saved, and the permanent magnet material is also correspondingly saved, further improving the power density of the motor. Compared with the surface-mounted series magnetic circuit, the rotor magnetic circuit adopts a parallel structure. Through the rotor poles formed by the magnetic conductive material, the air-gap magnetic field waveform has a good sine waveform, which can effectively control the torque ripple and prevent the generation of rectangular waves. In addition, the characteristics of the magnetostrictive material enable the rotor to appropriately increase its diameter in the radial direction during use. Without hitting the stator, the air gap between the rotor and the stator can be further reduced, improving the magnetic flux utilization rate and increasing the motor output power. At the same time, according to the rated speed required by the pump body, the low-speed characteristics can be used to adopt sealed bearings to achieve maintenance-free operation and reduce maintenance costs; the design of the high-power permanent magnet motor driver control makes the motor easy to achieve intelligent and screen-based operation, meeting the needs of intensive management.

[0017] As a further improvement of the present invention, a magnetic isolation end plate fan is fixed on the pole core. With this design, using a pole reinforcement key to fix the pole laminations can effectively reduce the volume of the fan and the parts used. At the same time, the magnetic isolation end plate not only plays a role in fixing the fan but also plays a role in fixing the permanent magnet. In the present invention, the fixing of the permanent magnet, pole laminations, and fan is completed through one-time fixing.

[0018] As a further improvement of the present invention, the magnetic isolation end plate fan includes a magnetic isolation end plate and fan blades. The magnetic isolation end plate and the fan blades are of an integral L-shaped structure, further reducing the number of parts, simplifying the structure, and making the volume smaller.

[0019] As a further improvement of the present invention, corresponding through holes are provided on the magnetic isolation spacer plate for connecting the permanent magnets. The rotor magnetic circuit adopts a parallel structure. The rotor magnetic poles formed by the magnetic conductive material have a good sine waveform of the air-gap magnetic field, which can effectively control the torque ripple and prevent the generation of rectangular waves.

[0020] As a further improvement of the present invention, the cross-sectional shape of the through hole is the same as that of the permanent magnet, and the size of the through hole shape is 0.1 mm larger than the corresponding size of the cross-section of the permanent magnet, which is convenient for installation and can ensure the accuracy of fixing the permanent magnet in the permanent magnet installation groove.

[0021] As a further improvement of the present invention, the motor output shaft of the high-voltage permanent magnet intelligent drive system for the water conservancy shaft is connected to the load, and no speed reducer is provided in the middle, which further reduces the volume of the high-voltage permanent magnet intelligent drive system for the water conservancy shaft, simplifies the structure of the entire high-voltage permanent magnet intelligent drive system for the water conservancy shaft, reduces the failure rate of the high-voltage permanent magnet intelligent drive system for the water conservancy shaft, and reduces the maintenance cost and equipment investment cost.

[0022] As a further improvement of the present invention, the operating speed can be adjusted according to actual needs between zero revolutions per minute and the rated speed, and a constant torque is output within the rated speed.

[0023] The positive effects of the present invention are:

[0024] The slender double-rotor design realizes a 2500 kw high-voltage permanent magnet intelligent drive system, meets the requirements of 10000V high-voltage power supply conditions, is energy-saving, efficient, safe and reliable, and has a simple structure;

[0025] The speed reducer is cancelled, the volume is reduced, the space is saved, and the actual needs of the site are met;

[0026] Compared with the asynchronous motor, the energy consumption is reduced by more than 20%;

[0027] Output at the rated speed required by the pump body, adopt a sealed bearing using the low-speed characteristic, realize maintenance-free operation, and reduce the maintenance cost;

[0028] The use of a high-power permanent magnet motor driver for control is easy to realize intelligent and screen-based operation, meeting the needs of intensive management. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a cross-sectional view of a high-voltage permanent magnet intelligent drive system for a water conservancy shaft according to the present invention;

[0030] Figure 2 is Figure 1 a left view of a high-voltage permanent magnet intelligent drive system for a water conservancy shaft according to the present invention shown in

[0031] Figure 3 isFigure 1 The structural diagram of the motor rotor in a high-voltage permanent magnet intelligent drive system for a water conservancy shaft shown in

[0032] Figure 4 is Figure 3 The left view of the motor rotor structure in a high-voltage permanent magnet intelligent drive system for a water conservancy shaft shown in

[0033] Figure 5 The schematic diagram of the magnet steel installation groove of the motor rotor in a high-voltage permanent magnet intelligent drive system for a water conservancy shaft of the present invention;

[0034] Legend: 1 - Rotating shaft, 2 - Magnetic isolation spacer, 3 - Pole core, 4 - Pole reinforcement key, 5 - Right magnetic isolation sleeve, 51 - Left magnetic isolation sleeve, 6 - Right rotor bracket, 61 - Left rotor bracket, 611 - Outer cylinder of the left rotor bracket, 612 - Web of the left rotor bracket, 7 - Right magnet steel, 71 - Left magnet steel, 8 - Pole punching sheet, 9 - Magnet steel installation groove, 10 - Installation hole for the pole reinforcement key, 11 - Magnet steel retaining plate, 12 - Magnet steel installation positioning hole, 13 - Nut, 14 - Magnetic isolation end plate fan, 15 - Shell, 16 - Stator assembly, 17 - High-power permanent magnet motor driver, 18 - Rotor assembly. Detailed implementation manners

[0035] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments:

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0037] Embodiment 1:

[0038] A high-voltage permanent magnet intelligent drive system for a water conservancy shaft includes a shell 15, a stator assembly 16, a rotor assembly 18 and a high-power permanent magnet motor driver 17. The length-diameter ratio of the rotor is 15. The rotor assembly 18 includes two rotor units that are coaxially arranged and sleeved on the same rotor shaft 1. A magnetic isolation spacer 2 is provided between the two rotor units, and the two rotor units and the magnetic isolation spacer 2 are closely adjacent to each other;

[0039] On the outer cylindrical surface of the rotor shaft 1, a right rotor bracket 6, a magnetic isolation spacer 2, and a left rotor bracket 61 are sleeved from right to left. The right rotor bracket 6 and the left rotor bracket 61 have the same structure. Taking the left rotor bracket 61 as an example, the outer cylinder 611 of the left rotor bracket is fixed on the outer cylindrical surface of the rotor shaft 1 through the left rotor bracket web 612, and its relative rotation with the rotor shaft 1 on the rotor shaft 1 is restricted by a flat key. The right rotor bracket 6, the magnetic isolation spacer 2, and the left rotor bracket 61 are closely adjacent to each other. A magnetic isolation sleeve is sleeved on each rotor bracket, that is: a left magnetic isolation sleeve 51 is sleeved on the left rotor bracket 61, and a right magnetic isolation sleeve 5 is sleeved on the right rotor bracket 6. On the outer cylindrical surface of each magnetic isolation sleeve, a pole core 3 is installed. A magnetic steel installation groove 9 is provided between adjacent pole cores 3. A magnetic steel is fixed in the magnetic steel installation groove 9. A left magnetic steel 71 is fixed in the left rotor magnetic steel installation groove 9 on the left side, and a left magnetic steel 7 is fixed in the right rotor magnetic steel installation groove 9 on the right side. The magnetic isolation sleeve is divided into an inner magnetic isolation layer and an outer fixing layer. The inner magnetic isolation layer is made of aluminum alloy, and the outer fixing layer is made of magnetostrictive material. The pole core 3 is formed by laminating a plurality of pole punching sheets 8. A fixing through hole, that is, a pole reinforcement key installation hole 10, is provided in the middle of the pole punching sheet 8, and a corresponding pole punching sheet 8 on the left magnetic isolation sleeve 51 and the right magnetic isolation sleeve 5 is pressed tightly by a pole reinforcement key 4. The pole punching sheet 8 is fan-shaped. A dovetail protrusion is provided on the inner circular edge of the pole punching sheet 8. Dovetail grooves are provided on the outer fixing layers of the left magnetic isolation sleeve 51 and the right magnetic isolation sleeve 5, and their sizes and shapes are exactly the same and correspond one by one. The pole punching sheet 8 is fixed in the dovetail groove through the dovetail protrusion. Corresponding through holes are provided on the magnetic isolation spacer 2 for connecting the magnetic steel. A magnetic isolation end plate fan 14 is fixed on the pole core 3. The magnetic isolation end plate fan 14 includes a magnetic isolation end plate and fan blades. The magnetic isolation end plate and the fan blades are of an integral L-shaped structure and are made by a close casting method;

[0040] The stator assembly includes a coil winding and a stator core formed by laminating fan-shaped pole punching sheets. The stator core has the same length as the pole core of the rotor and is evenly distributed along the inner wall circumference of the housing;

[0041] The high-power permanent magnet motor driver is fixed on the outer wall of the machine shell and is connected to the motor through a junction box;

[0042] The motor output shaft of the high-voltage permanent magnet intelligent drive system for a water conservancy shaft is connected to the load, and no speed reducer is provided in the middle. The operating speed can be adjusted according to actual needs between zero revolutions per minute and the rated speed, and a constant torque is output within the rated speed.

[0043] Embodiment 2:

[0044] A high-voltage permanent magnet intelligent drive system for a water conservancy shaft, comprising a housing 15, a stator assembly 16, a rotor assembly 18 and a high-power permanent magnet motor driver 17. The ratio of the length to the diameter of the rotor is 18. The rotor assembly 18 includes two rotor units that are coaxially arranged and sleeved on the same rotor shaft 1. There is a magnetic isolation spacer 2 between the two rotor units, and the two rotor units and the magnetic isolation spacer 2 are closely adjacent to each other;

[0045] On the outer cylindrical surface of the rotor shaft 1, a right rotor bracket 6, a magnetic isolation spacer 2 and a left rotor bracket 61 are sleeved from right to left. The right rotor bracket 6 and the left rotor bracket 61 have the same structure. Taking the left rotor bracket 61 as an example, the outer cylinder 611 of the left rotor bracket is fixed on the outer cylindrical surface of the rotor shaft 1 through the left rotor bracket web 612 and is restricted from relative rotation with the rotor shaft 1 on the rotor shaft 1 by a flat key. The right rotor bracket 6, the magnetic isolation spacer 2 and the left rotor bracket 61 are closely adjacent to each other. A magnetic isolation sleeve is sleeved on each rotor bracket, that is, a left magnetic isolation sleeve 51 is sleeved on the left rotor bracket 61, and a right magnetic isolation sleeve 5 is sleeved on the right rotor bracket 6. A pole core 3 is installed on the outer cylindrical surface of each magnetic isolation sleeve. There is a magnetic steel installation groove 9 between adjacent pole cores 3. A magnetic steel is fixed in the magnetic steel installation groove 9. A left magnetic steel 71 is fixed in the left rotor magnetic steel installation groove 9 on the left side, and a left magnetic steel 7 is fixed in the right rotor magnetic steel installation groove 9 on the right side. The magnetic isolation sleeve is divided into an inner magnetic isolation layer and an outer fixing layer. The inner magnetic isolation layer is made of aluminum alloy, and the outer fixing layer is made of magnetostrictive material. The pole core 3 is formed by stacking a plurality of pole punching sheets 8. There is a fixed through hole in the middle of the pole punching sheet 8, that is, a pole reinforcement key installation hole 10, and a corresponding pole punching sheet 8 on the left magnetic isolation sleeve 51 and the right magnetic isolation sleeve 5 is pressed tightly by a pole reinforcement key 4. The pole punching sheet 8 is fan-shaped. There is a dovetail protrusion on the inner circular edge of the pole punching sheet 8. Dovetail grooves are provided on the outer fixing layers of the left magnetic isolation sleeve 51 and the right magnetic isolation sleeve 5, and their sizes and shapes are exactly the same and correspond one by one. The pole punching sheet 8 is fixed in the dovetail groove through the dovetail protrusion. Corresponding through holes are provided on the magnetic isolation spacer 2 to connect the magnetic steel. A magnetic isolation end plate fan 14 is fixed on the pole core 3. The magnetic isolation end plate fan 14 includes a magnetic isolation end plate and fan blades. The magnetic isolation end plate and the fan blades are of an integral L-shaped structure and are formed by stamping metal plates;

[0046] The stator assembly includes a coil winding and a stator core formed by stacking fan-shaped pole punching sheets. The length of the stator core is equal to that of the pole core of the rotor and is evenly distributed along the inner wall circumference of the housing;

[0047] The high-power permanent magnet motor driver is fixed on the outer wall of the machine shell and is connected to the motor through a junction box;

[0048] The motor output shaft of the high-voltage permanent magnet intelligent drive system for the water conservancy shaft is connected to the load, and no speed reducer is set in the middle. The operating speed can be adjusted according to actual needs between zero revolutions per minute and the rated speed, and a constant torque is output within the rated speed.

[0049] The foregoing has broadly outlined some aspects and features of the various embodiments, which should be construed as merely illustrative of the various potential applications. Other beneficial results can be obtained by applying the disclosed information in different ways or by combining the various aspects of the disclosed embodiments. Based on the scope defined by the claims, a more comprehensive understanding of other aspects can be obtained by referring to the detailed description of the exemplary embodiments in conjunction with the drawings.

[0050] In addition, the present invention also discloses the following technical solutions:

[0051] Solution 1:

[0052] A rotor fan is fixed on the pole core 3. The rotor fan includes a magnetic isolation end plate and fan blades. The magnetic isolation end plate and the fan blades are of an integral L-shaped structure. The magnetic isolation end plate is provided with through holes. The through holes are sleeved at both ends of the pole reinforcement key 4 and fixed at the ends of the pole reinforcement key with nuts 13. The dimension of the magnetic isolation end plate in the circumferential direction is larger than that of the pole punching sheet 8, and the part larger than the pole punching sheet 8 is used to block the axial movement of the magnetic steel along the rotor.

[0053] Solution 2:

[0054] A rectangular magnetic steel installation groove 9 is provided between adjacent pole cores 3. A magnetic steel is fixed in the magnetic steel installation groove 9. A magnetic steel retaining piece 11 is provided at the outer cylindrical surface end of the magnetic steel installation groove 9 to prevent the magnetic steel from being thrown out of the magnetic steel installation groove 9. The magnetic steel retaining piece 11 is of a split structure and is respectively arranged on both sides in the diameter direction of the fan-shaped ring structure of adjacent pole punching sheets 8 and close to the outer circular edge.

[0055] Solution 3:

[0056] A rectangular magnetic steel installation groove 9 is provided between adjacent pole cores 3. A magnetic steel is fixed in the magnetic steel installation groove 9. A magnetic steel retaining piece 11 is provided at the outer cylindrical surface end of the magnetic steel installation groove 9 to prevent the magnetic steel from being thrown out of the magnetic steel installation groove 9. The magnetic steel retaining piece 11 is of an integral structure. Slots are provided on both sides in the diameter direction of the fan-shaped ring structure of adjacent pole punching sheets 8 and close to the outer circular edge, and the magnetic steel retaining piece 11 is inserted into the slots.

[0057] The above embodiments have described the present invention in detail. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions, deletions, and substitutions made by those skilled in the art within the essence of the present invention also fall within the protection scope of the present invention.

Claims

1. A high-voltage permanent magnet intelligent drive system for a water conservancy shaft, comprising a housing, a stator assembly, a rotor assembly and a high-power permanent magnet motor driver, characterized in that The length-diameter ratio of the rotor is ≥11 and ≤20. The rotor assembly includes two rotor units that are coaxial and sleeved on the same rotor shaft. A magnetic isolation spacer is provided between the two rotor units, and the two rotor units and the magnetic isolation spacer are closely adjacent to each other. Each rotor unit includes a rotor bracket, a magnetic isolation sleeve, a pole core, and a permanent magnet. A magnetic isolation sleeve is sleeved on the rotor bracket. Pole cores are mounted on the outer cylindrical surface of each magnetic isolation sleeve. A permanent magnet mounting groove is provided between adjacent pole cores, and a permanent magnet is fixed in the permanent magnet mounting groove. The magnetic isolation sleeve is divided into an inner magnetic isolation layer and an outer fixing layer. The material of the outer fixing layer is a magnetostrictive material, so that the rotor can appropriately increase its diameter in the radial direction during use, reduce the air gap between the rotor and the stator, improve the magnetic flux utilization rate, increase the output power of the motor, and a sealed bearing is adopted. The rotor magnetic circuit adopts a parallel structure, and the rotor poles are formed through a magnetic conductive material to ensure that the air gap magnetic field waveform is a sine waveform, achieve effective control of torque ripple, and prevent the generation of rectangular waves. The stator assembly includes a stator core formed by laminating a coil winding and a fan-shaped pole punching sheet. The length of the stator core is equal to that of the pole core of the rotor and is evenly distributed along the inner wall circumference of the housing. The high-power permanent magnet motor driver is fixed on the outer wall of the machine shell and is connected to the motor through a junction box. A magnetic isolation end plate fan is fixed on the pole core, and a pole reinforcement key fixes the pole punching sheet to reduce the volume of the fan and the parts used. At the same time, the magnetic isolation end plate not only fixes the fan but also fixes the permanent magnet. The magnetic isolation end plate fan includes a magnetic isolation end plate and fan blades. The magnetic isolation end plate and the fan blades are of an integral L-shaped structure. Through holes are provided on the magnetic isolation end plate, and the through holes are sleeved at both ends of the pole reinforcement key and are fixed to the ends of the pole reinforcement key with nuts. The dimension of the magnetic isolation end plate in the circumferential direction is larger than that of the pole punching sheet, and the part larger than the pole punching sheet is used to block the axial movement of the permanent magnet along the rotor.

2. The high-voltage permanent magnet intelligent drive system for a water conservancy shaft according to claim 1, characterized in that, Corresponding through holes are provided on the magnetic isolation spacer for connecting the permanent magnets.

3. The high-voltage permanent magnet intelligent drive system for a water conservancy vertical shaft according to claim 2, wherein, The through holes have the same cross-sectional shape as the permanent magnets, and the shape of the through holes is 0.1 mm larger than the corresponding dimension of the cross-section of the permanent magnets.

4. A high-voltage permanent magnet intelligent drive system for a water conservancy shaft according to any one of claims 1-3, characterized in that, The motor output shaft of the high-pressure permanent magnet intelligent drive system for the water conservancy shaft is connected to the load, and no speed reducer is provided in the middle.

5. The high-voltage permanent magnet intelligent drive system for a water conservancy shaft according to claim 4, wherein The operating speed can be adjusted according to actual needs between zero revolutions per minute and the rated speed, and a constant torque is output within the rated speed.

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