A one-time integral magnetizing device suitable for permanent magnet half-direct-drive wind power motor rotor surface-mounted magnetic poles

Abstract

The utility model discloses a one -time whole magnetizing device suitable for permanent -magnetic half direct drive wind power motor rotor surface -paste type magnetic pole belongs to wind driven generator assembly technical field. One -time whole magnetizing device includes the magnetizing coil unit of arrangement in the lateral circumference of rotor magnetic pole, and magnetizing coil unit is at least 2, and magnetizing coil unit is in the shape of split, and magnetizing coil unit is concentric with rotor and is arranged, and the annular structure of closed and can whole magnetizing is formed between magnetizing coil unit, and the insulating part for sealing and positioning is equipped between magnetizing coil unit and magnetic pole, and magnetizing coil unit includes magnetizing coil and is used for installing the backboard of magnetizing coil, and magnetizing coil one end is equipped with magnetizing coil interface, and magnetizing coil other end is equipped with magnetizing coil interface, and magnetizing coil interface all is connected with water cooling device and power cable. In order to solve the problem such as high cost, low efficiency, magnetizing quality is poor in rotor magnetic pole magnetizing, realizes one -time whole magnetizing.

Description

Technical Field

[0001] This utility model relates to a magnetization device, and more particularly, to a one-time integral magnetization device suitable for surface-mounted magnetic poles of permanent magnet semi-direct drive wind turbine rotors, belonging to the field of wind turbine assembly technology. Background Technology

[0002] Currently, all semi-direct drive wind turbines are permanent magnet motors, meaning that the rotor poles consist of permanent magnets and a yoke. When magnetizing the rotor poles, a single permanent magnet is typically magnetized first, and then the magnetized permanent magnets are sequentially surface-mounted onto the yoke. Multiple permanent magnets are arranged along the yoke axis to form one pole of the rotor, and multiple poles are evenly distributed circumferentially on the outer surface of the yoke to constitute the rotor poles.

[0003] Because a single permanent magnet possesses strong magnetism after being magnetized, the magnetic force must be overcome during actual assembly, making the assembly operation difficult, risky, and prone to safety and quality issues. Although existing technologies (such as CN115346755A, CN114301247A, and CN118969436A) employ a "assemble first, then magnetize" process—that is, first assembling the unmagnetized permanent magnet onto the yoke, and then magnetizing the entire assembly with a magnetizing coil—this improves safety and assembly quality. However, the coverage area of ​​the magnetizing coil involved is limited, only one or a few poles can be magnetized. Subsequently, the rotor needs to be rotated or the coil moved to magnetize other poles, resulting in longer processing times and requiring additional equipment (such as a rotating platform), thus increasing costs.

[0004] Although the existing technology CN113903543A proposes "a magnetizing device and magnetizing method for permanent magnet motors based on modular coils" to solve the problems of poor versatility and complex assembly of existing magnetizing devices, it still has the following shortcomings:

[0005] 1. The coil arrangement coverage of the magnetization device is limited. When used for magnetizing medium and large permanent magnet motor rotors, after each part of the magnetic poles is magnetized, it is necessary to change the relative position of the magnetization module and the rotor magnetic poles to perform multiple separate magnetizations. It is not possible to magnetize all the magnetic poles of a single rotor at once, which means that the actual production efficiency is low.

[0006] Second, when magnetizing the rotor of a permanent magnet semi-direct drive wind turbine, it is necessary to apply pulse current to the magnetization module multiple times in order to complete the magnetization operation of one rotor. Each application of pulse current will cause irreversible damage to the insulation structure of the coil in the magnetization equipment. Frequent application of pulse current will affect the service life of the magnetization equipment.

[0007] Therefore, a device is needed that can achieve one-time overall magnetization in order to reduce magnetization costs, improve efficiency, and ensure magnetization quality. Summary of the Invention

[0008] To address the problems of high cost, low efficiency, and poor magnetization quality (demagnetization) in the magnetization of rotor poles in semi-direct-drive wind turbines, a one-time integral magnetization device suitable for surface-mounted poles of permanent magnet semi-direct-drive wind turbine rotors is proposed. In this technical solution, multiple segmented magnetization coil units are arranged circumferentially, and the internal structure of the magnetization coil units is further defined (ensuring reasonable circuit and water circuit connections between different magnetization coil units), thus achieving one-time integral magnetization of the salient-pole inner rotor of the permanent magnet semi-direct-drive wind turbine.

[0009] To achieve the above technical objectives, the following technical solution is proposed:

[0010] A one-time integral magnetization device for surface-mounted magnetic poles of a permanent magnet semi-direct drive wind turbine rotor includes at least two magnetization coil units arranged circumferentially on the outer side of the surface-mounted magnetic poles of the rotor. The magnetization coil units are segmented and concentrically arranged with the rotor, forming a closed annular structure that can be magnetized as a whole. An insulating component for sealing and positioning is provided between the magnetization coil units and the surface-mounted magnetic poles of the rotor.

[0011] The magnetizing coil unit includes a magnetizing coil and a back plate (made of stainless steel) for mounting the magnetizing coil. One end (head end) of the magnetizing coil is provided with a magnetizing coil interface, and the other end (tail end) of the magnetizing coil is provided with a magnetizing coil interface. Both magnetizing coil interfaces are connected to a water cooling device and a power cable.

[0012] Preferably, the number of magnetizing coil units is 2-6. Existing permanent magnet semi-direct drive wind turbine rotors typically have an outer diameter of over 1.5m. If a single magnetizing coil unit is used, it should be a single, integrated ring structure, which increases the manufacturing cost of the magnetizing device and also raises the transportation cost of the equipment. Furthermore, the size of a single magnetizing coil unit (specifically, the chord length of the mounting backplate) should be controlled between 0.8-1.6m, and the specific number of magnetizing coil units should be determined based on the product dimensions of different models, i.e., at least two magnetizing coil units. Considering the overall magnetizing effect, cost, and ease of assembly, a more preferable approach is to use 2-6 magnetizing coil units.

[0013] Preferably, the back plate is arc-shaped. This shape ensures that the magnetizing coil unit can be well fitted to the rotor of the permanent magnet semi-direct drive wind turbine (the magnetizing coil unit must maintain a uniform and consistent gap with the circumferentially distributed magnetic poles), thereby magnetizing the magnetic poles of the permanent magnet semi-direct drive wind turbine rotor. Furthermore, if the back plate is planar, it can be well fitted to the secondary winding of a linear motor, thus enabling the magnetization of the linear motor secondary winding.

[0014] Preferably, the inner side of the back plate is provided with an insulating slot for fixing the magnetizing coil. The magnetizing coil is sleeved (e.g., embedded) in the insulating slot, and the inner circular surface of the back plate fits against the outer circular surface of the insulating slot. Specifically, the size of the insulating slot can be reasonably set according to the shape of the magnetizing coil and the magnetic pole. This setting can realize the magnetization of the rotor magnetic poles in the permanent magnet semi-direct drive wind turbine.

[0015] Preferably, the outer surface of the back plate is provided with an insulating slot for fixing the magnetizing coil. The magnetizing coil is sleeved (e.g., embedded) in the insulating slot, and the outer circular surface of the back plate fits against the inner circle of the insulating slot. Specifically, the size of the insulating slot can be reasonably set according to the shape of the magnetizing coil and the magnetic pole. This setting can realize the magnetization of the outer rotor magnetic pole of the permanent magnet semi-direct drive wind turbine.

[0016] Preferably, the insulating slots are arranged in a "serpentine" manner to further ensure that the two adjacent magnetizing coils arranged longitudinally are symmetrically distributed around the center line of a single magnetic pole. The specific arrangement trajectory of the magnetizing coils is determined by the actual structure of the magnetic poles (vertical magnetic poles, inclined magnetic poles); as for the insulating slots themselves, their shape is determined in conjunction with the arrangement of the magnetizing coils, and it is only necessary to effectively fix the magnetizing coils.

[0017] Preferably, the magnetizing coil interface is provided with a magnetizing coil mounting port, a water cooling interface and a copper busbar. The magnetizing coil mounting port is connected to the magnetizing coil, the water cooling interface is connected to the water pipe in the water cooling device, and the copper busbar is connected to the power cable.

[0018] The magnetizing coil is composed of multiple turns of hollow wire (hollow copper wire), with cooling water flowing through the hollow part and current flowing through the metal part of the wire;

[0019] The water pipes are made of insulated material, and the cooling water is pure water that is not conductive.

[0020] Preferably, the insulating component includes insulating rubber and an insulating wedge. Insulating rubber is provided in the gap between the magnetizing coil unit and the rotor surface-mounted magnetic pole, and an insulating wedge is provided in the residual gap between the insulating rubber and the rotor surface-mounted magnetic pole, thereby ensuring complete contact between the device and the magnetic pole without relative displacement. Specifically, by installing an insulating wedge between the magnetizing coil unit (insulating slot) and the magnetizing coil unit, after the magnetizing device is assembled and the rotor is installed, the distance between the magnetizing coil and the magnetic pole can be adjusted according to actual production needs, ensuring consistent distance and improving magnetization quality.

[0021] Preferably, the magnetizing coil unit has a reinforcing member on its outer side.

[0022] Preferably, the reinforcing member is a reinforcing hoop.

[0023] Preferably, there are three reinforcing hoops, which are respectively assembled on the upper, middle and lower parts of the outer side of the magnetizing coil unit. This arrangement confines the magnetizing coil unit to a designated position, which can effectively resist the repulsive force caused by the strong magnetizing magnetic field generated instantaneously by the equipment during the magnetization of the rotor poles, thus preventing deformation of the magnetizing coil unit.

[0024] The positional relationships involved in this technical solution, such as "outer side", "circumferential", "concentric", "between", "inner side", "outer side", "inner", "one end", "the other end", "upper", "upper part", "middle part", and "lower part", are defined according to the actual usage conditions and are conventional terms in this technical field, as well as conventional terms used by those skilled in the art in actual use.

[0025] The beneficial technical effects of adopting this technical solution are as follows:

[0026] I. In this utility model, by assembling the segmented magnetizing coil units into a closed and integrally magnetized ring structure, the rotor is completely surrounded and arranged on the outside of the rotor's surface-mounted magnetic poles. Then, according to the required magnetic field strength of the rotor, a suitable pulse current is applied at once to complete the overall magnetization of a single rotor, thereby improving production efficiency and equipment lifespan. In addition, by rationally arranging the internal structure of the magnetizing coil units and introducing pure water into the magnetizing coil units, the operating temperature rise of this magnetizing device can be controlled, which is beneficial to improving the stability of the magnetizing device and extending its service life.

[0027] Second, in this utility model, by reasonably arranging the magnetizing coil units, the magnetizing coils are evenly arranged on both sides of each column of magnetic poles along the rotor axis, ensuring that all magnetic poles to be magnetized can be covered at one time, without the need to use other tooling such as rotor rotating platform and shielding plate, thus ensuring lower cost.

[0028] Third, in this utility model, only one magnetization operation is required to complete the magnetization of a single rotor pole. The process involved is simple and efficient, effectively saving the overall time in the assembly process of the semi-direct drive wind turbine.

[0029] Fourth, by adopting this utility model, one-time overall magnetization can be achieved, which effectively avoids the demagnetization of other magnetic poles caused by multiple magnetizations of a single pole;

[0030] V. In this utility model, the magnetizing coil is wound with multiple turns of hollow wire, and the cooling water flows through the hollow part to dissipate heat, reduce the temperature rise during the use of the device, shorten the cooling time of the equipment after a single magnetization, and improve the magnetization efficiency.

[0031] VI. In this utility model, by adjusting the depth of the insertion of the insulating wedges at the upper and lower ends into the gap, the radial distance between the magnetizing coil and the magnetic pole can be adjusted, thereby ensuring the uniformity of the magnetic field and improving the magnetization quality. Attached Figure Description

[0032] Figure 1 This is a diagram showing the assembled state of this utility model;

[0033] Figure 2 This is a schematic diagram of the magnetizing coil unit structure in this utility model;

[0034] Figure 3 This is a schematic diagram of the structure of this utility model;

[0035] Figure 4 This is a schematic diagram of the magnetizing coil connector structure in this utility model;

[0036] Figure 5 This is a schematic diagram of the fixed state of the magnetizing coil unit in this utility model;

[0037] Figure 6 This is a cross-sectional view of the magnetizing coil in this utility model;

[0038] Figure 7 This is a schematic diagram of the insulating wedge in this utility model;

[0039] Figure 8 This is a schematic diagram of the working principle of the water circuit and circuit in the magnetizing coil unit of this utility model (including the location of the joint of the parallel topology structure of the water circuit, the direction of circuit flow, and the direction of water flow; solid arrows represent the direction of pulse current, and hollow arrows represent the direction of water flow in the water cooling pipe).

[0040] Figure 9 This is a schematic diagram of the working principle of the internal circuit of the magnetizing coil unit in this utility model (including the location of the connector of the parallel water circuit series topology and the direction of circuit flow).

[0041] Figure 10 This is a schematic diagram of the working principle of the water circuit in the magnetizing coil unit of this utility model (including the position of the connector of the series topology structure of the water circuit series circuit and the direction of water flow).

[0042] In the diagram, 1. Magnetizing coil unit, 2. Reinforcing hoop, 3. Insulating rubber, 4. Insulating wedge, 5. Power cable, 6. Jumper cable, 7. Four-way water pipe, 8. Connecting water pipe, 11. Insulating slot, 12. Back plate, 13. Magnetizing coil, 131. Hollow part, 132. Metal part, 14. Magnetizing coil interface, 141. Magnetizing coil mounting port, 142. Water cooling interface, 143. Copper busbar, 15. Rotor surface-mounted magnetic pole. Detailed Implementation

[0043] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0044] Example 1

[0045] This embodiment provides: a one-time integral magnetization device suitable for surface-mounted magnetic poles of permanent magnet semi-direct drive wind turbine rotors, such as... Figure 1 , 3 As shown, the device includes at least two magnetizing coil units 1 arranged circumferentially on the outer side of the rotor surface-mount magnetic pole 15. The magnetizing coil units 1 are segmented and concentrically arranged with the rotor, forming a closed and integrally magnetized annular structure. An insulating element for sealing and positioning is provided between the magnetizing coil units 1 and the rotor surface-mount magnetic pole 15.

[0046] like Figure 2 As shown, the magnetizing coil unit 1 includes a magnetizing coil 13 and a back plate 12 (made of stainless steel) for mounting the magnetizing coil 13. One end (head end) of the magnetizing coil 13 is provided with a magnetizing coil interface 14, and the other end (tail end) of the magnetizing coil 13 is also provided with a magnetizing coil interface 14. Both magnetizing coil interfaces 14 are connected to a water cooling device and a power cable 5.

[0047] Among them, by arranging multiple segmented magnetizing coil units 1 in the circumferential direction, and further defining the internal structure of the magnetizing coil unit 1 (ensuring reasonable connection of circuits and water channels between different magnetizing coil units 1), the one-time overall magnetization of the inner rotor of the salient pole of the permanent magnet semi-direct drive wind turbine is achieved.

[0048] The magnetizing coil interface 14 is located at both ends of the magnetizing coil 13. This arrangement conforms to the natural flow direction of the circuit and water, and also facilitates the connection between different magnetizing coil units 1. The magnetizing coil interface 14 can be located on the lower side of the back plate 12 or on the upper side of the back plate 12.

[0049] Example 2

[0050] Based on Embodiment 1, this embodiment further defines the magnetizing coil unit 1 to further illustrate the technical solution.

[0051] The number of magnetizing coil units 1 ranges from 2 to 6. Existing permanent magnet semi-direct drive wind turbine rotors typically have an outer diameter of over 1.5m. If a single magnetizing coil unit 1 is used, it should be a single, integrated ring structure, which increases the manufacturing cost of the magnetizing device and also raises the transportation cost. Furthermore, the dimensions of a single magnetizing coil unit 1 (specifically, the chord length of the mounting backplate 12) should be controlled between 0.8 and 1.6m. The specific number of magnetizing coil units 1 should be determined based on the product dimensions of different models, meaning at least two magnetizing coil units 1 are required. Therefore, considering magnetizing effect, cost, and ease of assembly, a number of magnetizing coil units 1 ranging from 2 to 6 is more preferable.

[0052] Specifically, regarding the back plate 12: the back plate 12 is arc-shaped. This shape ensures that the magnetizing coil unit 1 can be well matched with the permanent magnet semi-direct drive wind turbine rotor to magnetize the rotor poles. Furthermore, if the back plate 12 is planar, it can be well matched with the linear motor rotor to magnetize the rotor poles.

[0053] Regarding the fixing of the magnetizing coil 13: an insulating slot 11 for fixing the magnetizing coil 13 is arranged on the inner side of the back plate 12. The magnetizing coil 13 is sleeved (e.g., embedded) in the insulating slot 11, and the inner circular surface of the back plate 12 fits against the outer circle of the insulating slot 11. The size of the insulating slot 11 can be reasonably set according to the shape of the magnetizing coil 13 and the magnetic pole. This setting can realize the magnetization of the rotor magnetic poles in the permanent magnet semi-direct drive wind turbine.

[0054] An insulating slot 11 for fixing the magnetizing coil 13 is arranged on the outer surface of the back plate 12. The magnetizing coil 13 is sleeved (e.g., embedded) in the insulating slot 11, and the outer circular surface of the back plate 12 fits against the inner circle of the insulating slot 11. The size of the insulating slot 11 can be reasonably set according to the shape of the magnetizing coil 13 and the magnetic pole. This setting can realize the magnetization of the magnetic poles of the outer rotor of the permanent magnet semi-direct drive wind turbine.

[0055] More preferably, the insulating slot 11 is arranged in a "serpentine" manner, further ensuring that the two adjacent magnetizing coils 13 arranged longitudinally are symmetrically distributed around the center line of a single magnetic pole. The specific arrangement trajectory of the magnetizing coils 13 is determined by the actual structure of the magnetic poles (vertical magnetic pole, inclined magnetic pole); as for the insulating slot 11 itself, its shape is determined to match the arrangement of the magnetizing coils 13, and it is only necessary to effectively fix the magnetizing coils 13.

[0056] Among them, such as Figure 4As shown, for the magnetizing coil interface 14: the magnetizing coil interface 14 is provided with a magnetizing coil 13 mounting port, a water cooling interface 142, and a copper busbar 143. The magnetizing coil 13 mounting port is connected to the magnetizing coil 13, the water cooling interface 142 is connected to the water pipe in the water cooling device, and the copper busbar 143 is connected to the power cable 5; the magnetizing coil 13 is composed of multiple turns of hollow wire (hollow copper wire) (e.g. Figure 6 As shown), the cooling water flows through the hollow part 131, and the current flows through the metal part 132 in the conductor; the water pipe is made of insulating material, and the cooling water is pure water that is not conductive.

[0057] Example 3

[0058] Based on Examples 1-2, this example further defines the insulating component to further illustrate the technical solution.

[0059] like Figure 5 , 7 As shown, the insulating components include insulating rubber 3 and insulating wedges 4. Insulating rubber 3 is provided in the gap between the magnetizing coil unit 1 and the rotor surface-mounted magnetic pole 15, and insulating wedges 4 are provided in the residual gap between the insulating rubber 3 and the rotor surface-mounted magnetic pole 15, thereby ensuring complete contact between the device and the magnetic pole without relative displacement. Specifically, by installing insulating wedges 4 between the magnetizing coil unit 1 (insulating slot 11) and the magnetizing coil unit 1, after the magnetizing device is assembled and the rotor is installed, the distance between the magnetizing coil 13 and the magnetic pole can be adjusted according to actual production needs, ensuring consistent distance and improving magnetization quality.

[0060] Example 4

[0061] Based on embodiments 1-3, this embodiment further specifies the following to improve the assemblability of the magnetizing coil unit 1:

[0062] The magnetizing coil unit 1 has a reinforcing member on its outer side, more specifically, the reinforcing member is a reinforcing hoop 2.

[0063] Three reinforcing hoops 2 are respectively installed on the upper, middle and lower parts of the outer side of the magnetizing coil unit 1. This arrangement confines the magnetizing coil unit 1 to a designated position, which can effectively resist the repulsive force caused by the strong magnetizing magnetic field generated instantaneously during the magnetization of the rotor poles, thus preventing deformation of the magnetizing coil unit 1 and improving the overall rigidity of the device.

[0064] Example 5

[0065] Based on Examples 1-4, this example provides: a one-time overall magnetization method for surface-mounted magnetic poles of a permanent magnet semi-direct drive wind turbine rotor, specifically including the following steps:

[0066] S1: Assembly of the salient-pole internal rotor surface-mount magnetic pole 15

[0067] Place the yoke on the installation station and control the overall leveling of the yoke to within 0.3 / 1000mm. Then, install the unmagnetized permanent magnets one by one onto the outer surface of the yoke using a surface-mount structure.

[0068] S2: Arrange magnetizing coil 13

[0069] Magnetizing coil units 1 (e.g., four) are arranged circumferentially outside the surface-mounted magnetic pole 15 of the rotor to be magnetized. A single magnetizing coil unit 1 can cover 1 / 4 of the outer circle of the magnetic pole, and the four magnetizing coil units 1 are combined together to completely surround the entire rotor magnetic pole. Specifically, this includes: ① placing the magnetizing coil units 1 on the periphery of the magnetic pole and controlling the magnetizing coil units 1 to be concentric with the rotor; ② assembling the reinforcing hoops 2 to the upper, middle, and lower positions of the outer circle of the magnetizing coil units 1; ③ inserting insulating rubber 3 into the gap between the magnetizing coil units 1 and the magnetic pole, and then driving insulating wedges 4 into the remaining gap between the insulating rubber 3 and the magnetic pole to ensure that the tooling and the product are in complete contact and do not undergo relative displacement; ④ connecting the water cooling device and the magnetizing power supply to the magnetizing coil interface 14.

[0070] S3: Apply pulse current

[0071] A pulse current is passed through the arranged magnetizing coil 13, and a magnetizing magnetic field is generated around the magnetizing coil 13 through the magnetic effect of the current; and, by setting appropriate current parameters, a sufficiently strong magnetic field is generated to magnetize the permanent magnet.

[0072] Based on the above-mentioned method for magnetizing the entire magnetic pole, this invention proposes a method for fixing the magnetizing coil 13 module.

[0073] Example 6

[0074] Based on Examples 1-4, this example is one implementation method.

[0075] Provided: A magnetizing coil unit connection topology, such as Figure 8 As shown, the magnetizing coils 13 in the four magnetizing coil units 11-1, 1-2, 1-3, and 1-4 are each connected to a magnetizing coil interface 14 at both ends. Each magnetizing coil unit 1 is connected to a set of water pipes and power cables 5. The water cooling device has four water pipes 7 leading out, which are connected to the four magnetizing coil units 1 respectively, forming a parallel water circuit structure. At the same time, the magnetizing power supply has four power cables 5 leading out, which are connected to the four magnetizing coil units 1 respectively, forming a parallel circuit structure.

[0076] During operation, the water cooling device is first turned on to cool the four magnetizing coil units 1 by introducing pure water. Then, the magnetizing power supply is turned on to magnetize the four magnetizing coil units 1 by supplying pulse current.

[0077] Example 7

[0078] Based on Examples 1-4, this example is one implementation method.

[0079] Provided: A magnetizing coil unit connection topology, such as Figure 9 As shown, the cooling water circuit adopts four sets of parallel connection. In terms of circuit, the jumper cable 6 is used to connect the tail of the magnetizing coil unit 11-1 to the head of the magnetizing coil unit 11-2, the tail of the magnetizing coil unit 11-2 to the head of the magnetizing coil unit 11-3, and the tail of the magnetizing coil unit 11-3 to the head of the magnetizing coil unit 11-4, forming a structure in which the four magnetizing coil units 1 are connected in series.

[0080] The magnetizing power supply leads out only one set of power cables 5, which are connected to the head of the magnetizing coil unit 11-1 and the tail of the magnetizing coil unit 11-4 respectively. Then, a pulse current is applied to complete the magnetization.

[0081] In this implementation, wiring is simple, cables are saved, and operation is easier.

[0082] Example 8

[0083] Based on Examples 1-4, this example is one implementation method.

[0084] Provided: A magnetizing coil unit connection topology, such as Figure 10 As shown, the circuit uses four magnetizing coil units 1 connected in series. The cooling water circuit uses connecting water pipes 8 to connect the tail of magnetizing coil unit 11-1 to the head of magnetizing coil unit 11-2, and the tail of magnetizing coil unit 11-3 to the head of magnetizing coil unit 11-4. The water cooling device leads out two water pipes, which are connected to the head of magnetizing coil unit 11-1 and the tail of magnetizing coil unit 11-2, and the head of magnetizing coil unit 11-3 and the tail of magnetizing coil unit 11-4, respectively. The water circuits of every two magnetizing coil units 1 are connected in series to form a group, forming two groups of magnetizing coil unit 1 water circuits connected in parallel.

[0085] In this embodiment, the wiring is simple and the cooling length of a single water pipe is appropriate, which can save the amount of water pipes used and achieve a good cooling effect.

Claims

1. A one-time integral magnetization device for surface-mounted magnetic poles of a permanent magnet semi-direct drive wind turbine rotor, characterized in that, It includes a magnetizing coil unit (1) arranged circumferentially on the outside of the rotor surface-mount magnetic pole (15), with at least two magnetizing coil units (1), each magnetizing coil unit (1) being segmented, and the magnetizing coil units (1) being concentrically arranged with the rotor, forming a closed and integrally magnetized ring structure between the magnetizing coil units (1); an insulating element for sealing and positioning is provided between the magnetizing coil unit (1) and the rotor surface-mount magnetic pole (15); The magnetizing coil unit (1) includes a magnetizing coil (13) and a back plate (12) for mounting the magnetizing coil (13). One end of the magnetizing coil (13) is provided with a magnetizing coil interface (14), and the other end of the magnetizing coil (13) is provided with a magnetizing coil interface (14). The magnetizing coil interface (14) is connected to a water cooling device and a power cable (5).

2. The one-time integral magnetization device for surface-mounted magnetic poles of a permanent magnet semi-direct drive wind turbine rotor according to claim 1, characterized in that, The magnetizing coil unit (1) consists of 2-6 units.

3. The one-time integral magnetization device for surface-mounted magnetic poles of permanent magnet semi-direct drive wind turbine rotors according to claim 1, characterized in that, The back plate (12) is an arc-shaped back plate (12).

4. The one-time integral magnetization device for surface-mounted magnetic poles of permanent magnet semi-direct drive wind turbine rotors according to claim 3, characterized in that, An insulating slot (11) for fixing a magnetizing coil (13) is arranged on the inner side of the back plate (12). The magnetizing coil (13) is sleeved in the insulating slot (11), and the inner circular surface of the back plate (12) is in contact with the outer circle of the insulating slot (11).

5. The one-time integral magnetization device for surface-mounted magnetic poles of a permanent magnet semi-direct drive wind turbine rotor according to claim 3, characterized in that, An insulating slot (11) for fixing a magnetizing coil (13) is arranged on the outer side of the back plate (12). The magnetizing coil (13) is sleeved in the insulating slot (11), and the outer circular surface of the back plate (12) is in contact with the inner circle of the insulating slot (11).

6. The one-time integral magnetization device for surface-mounted magnetic poles of permanent magnet semi-direct drive wind turbine rotors according to any one of claims 1-5, characterized in that, The magnetizing coil interface (14) is provided with a magnetizing coil (13) mounting port, a water cooling interface (142) and a copper busbar (143). The magnetizing coil (13) mounting port is connected to the magnetizing coil (13), the water cooling interface (142) is connected to the water pipe in the water cooling device, and the copper busbar (143) is connected to the power cable (5). The magnetizing coil (13) is composed of multiple turns of hollow wire, with cooling water flowing through the hollow part (131) and current flowing through the metal part (132) in the wire. The water pipes are made of insulated material, and the cooling water is pure water.

7. The one-time integral magnetization device for surface-mounted magnetic poles of permanent magnet semi-direct drive wind turbine rotors according to any one of claims 1-5, characterized in that, The insulating component includes insulating rubber (3) and insulating wedge (4). The insulating rubber (3) is provided in the gap between the magnetizing coil unit (1) and the rotor surface-mounted magnetic pole (15), and the insulating wedge (4) is provided in the residual gap between the insulating rubber (3) and the rotor surface-mounted magnetic pole (15).

8. The one-time integral magnetization device for surface-mounted magnetic poles of a permanent magnet semi-direct drive wind turbine rotor according to claim 1, characterized in that, The magnetizing coil unit (1) is provided with a reinforcing member on its outer side.

9. The one-time integral magnetization device for surface-mounted magnetic poles of a permanent magnet semi-direct drive wind turbine rotor according to claim 8, characterized in that, The reinforcing member is a reinforcing hoop (2).

10. The one-time integral magnetization device for surface-mounted magnetic poles of a permanent magnet semi-direct drive wind turbine rotor according to claim 9, characterized in that, The reinforcing hoops (2) are three in number, respectively assembled on the upper, middle and lower parts of the outer side of the magnetizing coil unit (1).

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