An eddy current sensor for a magnetic levitation motor and an assembly method thereof

Abstract

The application provides an eddy current sensor and an assembling method thereof. The eddy current sensor comprises a sensor body, a winding part, a lead wire and an adjusting part. The winding part and the adjusting part are arranged at two ends of the sensor body respectively. The winding part is provided with a winding groove. The lead wire is wound in the winding groove to form a sensor coil. The adjusting part is provided with an adjusting clamping groove which is matched with the shape of an adjusting tool. The outer circumferential surface of the sensor body is provided with a thread. The lead wire can be inserted into the first threading channel and the second threading channel and fixed on the first needle and the second needle. After the eddy current sensor is installed, the adjusting tool is inserted into the adjusting clamping groove to adjust the distance between the winding part and the rotor, so that the eddy current sensor is in the optimal measurement range and the working performance of the magnetic suspension motor is improved. The lead wire is contained in the first threading channel and the second threading channel, and the lead wire is not moved during the adjusting process. After the eddy current sensor is installed, the adjusting process is convenient and fast.

Description

Technical Field

[0001] This application relates to the field of sensor technology, and in particular to an eddy current sensor for a magnetic levitation motor and its assembly method. Background Technology

[0002] As a core component of precision fluid control equipment, the rotor levitation and rotation control accuracy of magnetic levitation motors directly affects the system's operational stability. In existing technologies, eddy current sensors are typically used to monitor rotor displacement and speed. Their working principle is based on the interaction between a high-frequency magnetic field and induced eddy currents on the surface of the metal rotor, achieving non-contact measurement by detecting the impedance signal generated by changes in the gap. Each eddy current sensor has a measurement range and an optimal measurement range within that range; therefore, the distance between the eddy current sensor and the rotor affects the sensor's measurement accuracy.

[0003] However, in the existing technology, after the eddy current sensor is installed on the magnetic levitation motor, the cable will be driven when adjusting the distance, which makes the adjustment inconvenient and makes it impossible to accurately adjust the distance between the eddy current sensor and the rotor, and thus it is impossible to make the distance between the two within the optimal measurement range, which will affect the working performance of the magnetic levitation motor. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides an eddy current sensor for a magnetic levitation motor and its assembly method.

[0005] In a first aspect, this application provides an eddy current sensor for a magnetic levitation motor, comprising a sensor body, a winding portion, a wire, a first guide, a second guide, and an adjustment portion;

[0006] The outer peripheral surface of the sensor body is provided with threads;

[0007] The winding portion and the adjustment portion are respectively disposed at both ends of the sensor body;

[0008] The winding part includes a winding body, and a winding groove is formed on the outer peripheral surface of the winding body; at least one first wire passage is formed between the winding groove and the sensor body.

[0009] The wire is wound inside the winding groove to form a sensor coil;

[0010] At least one second wire-passing channel is formed on the sensor body; the second wire-passing channel passes through the sensor body in the direction of the adjustment part;

[0011] The sensor body has a first pin hole and a second pin hole arranged at intervals on one end face near the adjustment part.

[0012] The first guide is inserted into the first pin hole, and the second guide is inserted into the second pin hole; the two ends of the wire are respectively fixed to the first guide and the second guide;

[0013] The adjustment part has an adjustment slot that matches the shape of the adjustment tool.

[0014] In some embodiments of this application, the adjustment part includes an adjustment body, on which a third threading channel is formed; the third threading channel extends toward the first pin hole and the second pin hole and penetrates the adjustment body.

[0015] In some embodiments of this application, the height of the bottom wall of the third threading channel is lower than the height of the bottom wall of the adjusting slot.

[0016] In some embodiments of this application, the adjusting body may be a cylinder, a frustum, a prism, or an elliptical cylinder.

[0017] In some embodiments of this application, the adjustment slot is a straight slot, a cross-shaped slot, a star-shaped slot, a hexagonal slot, or a cross-shaped slot.

[0018] In some embodiments of this application, the first threading channel extends radially along the winding body.

[0019] In some embodiments of this application, the second threading channel is disposed inside the sensor body and extends along the axial direction of the sensor body; the second threading channel communicates with the first threading channel.

[0020] In some embodiments of this application, the second threading channel extends toward the winding portion and penetrates the winding portion.

[0021] In some embodiments of this application, the first threading channel is disposed on the outer periphery of the winding body and extends along the axial direction of the winding body.

[0022] In some embodiments of this application, the second threading channel is disposed on the outer periphery of the sensor body and extends along the axial direction of the sensor body.

[0023] In some embodiments of this application, there are two first threading channels; the two first threading channels are arranged at intervals.

[0024] In some embodiments of this application, the two first threading channels are symmetrically arranged.

[0025] In some embodiments of this application, there are two second threading channels; the second threading channel is correspondingly arranged with the first threading channel, and the two extend in the same direction.

[0026] In some embodiments of this application, the first pin hole and the second pin hole are respectively disposed on both sides of the adjustment slot.

[0027] In some embodiments of this application, the first pin hole and the second pin hole are symmetrically arranged.

[0028] In some embodiments of this application, the first pin hole and the second pin hole are disposed on one side of the adjustment slot.

[0029] In some embodiments of this application, the first pin hole and the second pin hole are located between the outer peripheral surface of the adjustment part and the outer peripheral surface of the sensor body.

[0030] In some embodiments of this application, at least one positioning surface is formed on the outer peripheral surface of the sensor body.

[0031] In some embodiments of this application, two symmetrically arranged positioning surfaces are provided on the outer peripheral surface of the sensor body.

[0032] A second aspect of this application provides a method for assembling the aforementioned eddy current sensor for a magnetic levitation motor, the assembly method comprising the following steps:

[0033] Step S1: Wind the wire into the winding groove to form a sensor coil;

[0034] Step S2: Insert both ends of the coil into the first wire-threading channel respectively;

[0035] Step S3: Pass both ends of the coil through the second wire-passing channel respectively;

[0036] Step S4: Thread the two ends of the coil into the third or fourth threading channel respectively;

[0037] Step S5: Insert the first guide into the first pin hole, insert the second guide into the second pin hole, and fix the two ends of the coil onto the first guide and the second guide respectively.

[0038] Compared with the prior art, the present invention has the following advantages and beneficial effects: The eddy current sensor for a magnetic levitation motor of this application includes a sensor body, a winding part, a wire, and an adjustment part. The winding part and the adjustment part are respectively disposed at both ends of the sensor body; a winding groove is formed on the winding part; the wire is wound in the winding groove to form a sensor coil; an adjustment slot adapted to the shape of the adjustment tool is formed on the adjustment part; a thread is provided on the outer peripheral surface of the sensor body; the wire can be passed through the first wire passage and the second wire passage and fixed on the first and second guides; after the eddy current sensor is installed, the adjustment tool can be inserted into the adjustment slot to adjust the distance between the winding part and the rotor, so that the eddy current sensor is within the optimal measurement range, thereby improving the working performance of the magnetic levitation motor; the wire is housed in the first and second wire passages, and will not move during the adjustment process, making the adjustment of the eddy current sensor convenient and quick after installation.

[0039] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit this document. Attached Figure Description

[0040] The accompanying drawings, which form part of this document, are used to provide a further understanding of the document. The illustrative embodiments and descriptions herein are used to explain the document and do not constitute an undue limitation thereof. In the drawings:

[0041] Figure 1 This is a schematic diagram of the structure of an eddy current sensor for a magnetic levitation motor provided in an exemplary embodiment of this application;

[0042] Figure 2 This is a schematic diagram of the structure of an eddy current sensor for a magnetic levitation motor provided in an exemplary embodiment of this application;

[0043] Figure 3 This is a side view of an eddy current sensor for a magnetically levitated motor provided in an exemplary embodiment of this application;

[0044] Figure 4 This is the book Figure 3 Sectional view at point BB;

[0045] Figure 5 This is a bottom view of an eddy current sensor for a magnetic levitation motor provided in an exemplary embodiment of this application;

[0046] Figure 6 This is a schematic diagram of the structure of an eddy current sensor for a magnetic levitation motor provided in an exemplary embodiment of this application;

[0047] Figure 7 This is a schematic diagram of the structure of an eddy current sensor for a magnetic levitation motor provided in an exemplary embodiment of this application;

[0048] Figure 8 A front view of an eddy current sensor for a magnetic levitation motor provided in an exemplary embodiment of this application;

[0049] Figure 9 This is a bottom view of an eddy current sensor for a magnetic levitation motor provided in an exemplary embodiment of this application;

[0050] Figure 10 This is a schematic diagram of the structure of an eddy current sensor for a magnetic levitation motor provided in an exemplary embodiment of this application;

[0051] Figure 11 This is a schematic diagram of the structure of an eddy current sensor for a magnetic levitation motor provided in an exemplary embodiment of this application;

[0052] Figure 12 This is a front view of an eddy current sensor for a magnetic levitation motor provided in an exemplary embodiment of this application;

[0053] Figure 13 This is a bottom view of an eddy current sensor for a magnetic levitation motor provided in an exemplary embodiment of this application;

[0054] Figure 14 This is a top view of an eddy current sensor for a magnetic levitation motor provided in an exemplary embodiment of this application.

[0055] In the picture:

[0056] 10. Sensor body; 101. Second wiring channel; 102. First pin hole; 103. Second pin hole; 104. Positioning surface; 105. Fourth wiring channel;

[0057] 20. Winding section; 201. Winding body; 202. Winding groove; 203. First threading channel;

[0058] 30. Adjustment section; 301. Adjustment body; 302. Adjustment slot; 303. Third threading channel. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0060] As a core component of precision fluid control equipment, the rotor levitation and rotation control accuracy of magnetic levitation motors directly affects the system's operational stability. In existing technologies, eddy current sensors are typically used to monitor rotor displacement and speed. Their working principle is based on the interaction between a high-frequency magnetic field and induced eddy currents on the surface of the metal rotor, achieving non-contact measurement by detecting the impedance signal generated by changes in the gap. Each eddy current sensor has a measurement range and an optimal measurement range within that range; therefore, the distance between the eddy current sensor and the rotor affects the sensor's measurement accuracy.

[0061] However, in the existing technology, after the eddy current sensor is installed on the magnetic levitation motor, the cable will be driven when adjusting the distance, which makes the adjustment inconvenient and makes it impossible to accurately adjust the distance between the eddy current sensor and the rotor, and thus it is impossible to make the distance between the two within the optimal measurement range, which will affect the working performance of the magnetic levitation motor.

[0062] Based on this, an exemplary embodiment of this application provides an eddy current sensor for a magnetic levitation motor and its assembly method. The eddy current sensor for the magnetic levitation motor includes a sensor body, a winding portion, a wire, and an adjustment portion. The winding portion and the adjustment portion are respectively disposed at both ends of the sensor body. A winding groove is formed on the winding portion. The wire is wound in the winding groove to form a sensor coil. An adjustment slot adapted to the shape of an adjustment tool is formed on the adjustment portion. A thread is provided on the outer peripheral surface of the sensor body. The wire can pass through a first wire-passing channel and a second wire-passing channel and be fixed on a first guide and a second guide. After the eddy current sensor is installed, the adjustment tool can be inserted into the adjustment slot to adjust the distance between the winding portion and the rotor, so that the eddy current sensor is within the optimal measurement range, thereby improving the working performance of the magnetic levitation motor. The wire is housed in the first wire-passing channel and the second wire-passing channel, and will not move during the adjustment process. The eddy current sensor is convenient and quick to adjust after installation.

[0063] Example 1:

[0064] An exemplary embodiment of this application provides an eddy current sensor for a magnetically levitated motor, such as... Figures 1 to 5 As shown, the eddy current sensor includes a sensor body 10, a winding portion 20, a wire, a first guide, a second guide, and an adjustment portion 30. The outer circumferential surface of the sensor body 10 is provided with threads. The sensor mounting hole has an internal thread that matches the external thread on the sensor body 10. Thus, by using the external thread on the sensor body 10 and the internal thread in the sensor mounting hole, the sensor body 10 can be adjusted within the sensor mounting hole. This allows for adjustment of the distance between the eddy current sensor and the rotor, ensuring the eddy current sensor is within its optimal measurement range and improving the working performance of the magnetic levitation motor.

[0065] The winding portion 20 and the adjusting portion 30 are respectively disposed at both ends of the sensor body 10; preferably, the sensor body 10, the winding portion 20, and the adjusting portion 30 are integrally formed and are all made of non-metallic materials, such as fiber-reinforced plastics or composite materials. During installation, the winding portion 20 is oriented towards the rotor, and the adjusting portion 30 is oriented away from the rotor. The winding portion 20 includes a winding body 201, and a winding groove 202 is formed on the outer peripheral surface of the winding body 201; at least one first wire passage 203 is formed between the winding groove 202 and the sensor body 10. The wire is wound in the winding groove 202 to form a sensor coil; preferably, the diameter of the wire in this application is between 0.05 mm and 0.2 mm. After the wire is wound in the winding groove 202, the formed sensor coil has two free ends.

[0066] For example, such as Figure 4 As shown, two first wire-passing channels 203 are provided between the winding groove 202 and the sensor body 10, and the two first wire-passing channels 203 are arranged at intervals. Preferably, the two first wire-passing channels 203 are arranged symmetrically about an axis, and the first wire-passing channels 203 extend radially along the winding body 201. At this time, the two free ends of the wire are respectively inserted into one of the first wire-passing channels 203.

[0067] In another exemplary embodiment, to facilitate processing and reduce processing complexity, only one first threading channel 203 may be provided; in this case, both free ends of the wire are inserted into one first threading channel 203. The first threading channel 203 and the winding groove 202 are interconnected by an elliptical process groove, and the wire can pass through the process groove and enter the first threading channel 203.

[0068] At least one second wiring channel 101 is formed on the sensor body 10; the second wiring channel 101 passes through the sensor body 10 in the direction toward the adjustment part 30. For example, Figure 2 and 4 As shown, a second wire-passing channel 101 is provided at the center of the sensor body 10 along the axial direction of the sensor body 10. For ease of processing, the second wire-passing channel 101 extends towards and passes through the winding portion 20. The cross-sectional shape of the second wire-passing channel 101 can be circular, triangular, polygonal, etc., but a circular shape is preferred for ease of processing. The second wire-passing channel 101 is connected to the first wire-passing channel 203. The wire passes through the first wire-passing channel 203, enters the second wire-passing channel 101, and exits the sensor body 10 along the direction of the second wire-passing channel 101 toward the adjustment portion 30.

[0069] like Figure 1 and 5As shown, the sensor body 10 has a first pin hole 102 and a second pin hole 103 arranged at intervals on one end face near the adjustment part 30. The first pin is inserted into the first pin hole 102, and the second pin is inserted into the second pin hole 103. Both the first and second pins are made of materials with good conductivity, such as copper, silver, or aluminum. One of the wires passing through the second wire channel 101 is fixed to the first pin, and the other is fixed to the second pin. The wires can be fixed to the first and second pins by welding, or by other fixing methods such as bonding. To improve the stability of the eddy current sensor, the wires are preferably fixed to the first and second pins by welding.

[0070] The adjusting part 30 has an adjusting groove 302 that matches the shape of the adjusting tool. The adjusting tool can be a screwdriver. The shape of the adjusting groove 302 can be various, such as a slotted groove, a cross-shaped groove, a star-shaped groove, a hexagonal groove, or a slotted groove. For ease of processing, such as... Figure 2 As shown, the adjustment slot 302 is preferably a straight slot.

[0071] For example, the adjustment unit 30 includes an adjustment body 301, on which a third threading channel 303 is formed; the third threading channel 303 extends toward the first pin hole 102 and the second pin hole 103 and passes through the adjustment body 301. Preferably, the third threading channel 303 and the adjustment slot 302 are arranged intersectingly, forming a cross-shaped groove between them, which can accommodate the adjustment tool with the cross-shaped end. After the wire passes through the second threading channel 101, it passes through the third threading channel 303 and is then fixed to the first pin or the second pin.

[0072] Preferably, the height of the bottom wall of the third wire channel 303 is lower than the height of the bottom wall of the adjustment slot 302. When the adjustment tool is inserted into the adjustment slot 302 to adjust the position of the eddy current sensor, the adjustment tool will not press on the wire and will not damage the wire because the wire is attached to the bottom wall of the third wire channel.

[0073] The shape of the adjustment body 301 can be selected in a variety of ways. For example, the adjustment body 301 can be a cylinder, a frustum, a prism, or an elliptical cylinder.

[0074] The adjustment part 30 can also be recessed into the sensor body 10. An adjustment groove 302 and a third wire passage 303 are formed on the end face of the sensor body 10 away from the winding part 20, which are recessed into the sensor body 10. The third wire passage 303 extends in the direction of the first pin hole 102 and the second pin hole 103.

[0075] For example, the first pin hole 102 and the second pin hole 103 are respectively disposed on both sides of the adjustment slot 302. At this time, the distance between the first pin hole 102 and the second pin hole 103 is large, which can facilitate the fixing of the wire on the first and second guides. At the same time, it is suitable for miniaturized eddy current sensors.

[0076] The first pin hole 102 and the second pin hole 103 can also be set on one side of the adjustment slot 302. In this case, the distance between the first pin hole 102 and the second pin hole 103 is relatively small, which is suitable for situations where the eddy current sensor is large in size.

[0077] Preferably, the first pin hole 102 and the second pin hole 103 are symmetrically arranged; and the first pin hole 102 and the second pin hole 103 are located between the outer peripheral surface of the adjustment part 30 and the outer peripheral surface of the sensor body 10. In this way, the distance between the first pin hole and the second pin hole is large, which is convenient for fixing the wire.

[0078] Example 2:

[0079] Based on Embodiment 1 described above, the main difference between this embodiment and Embodiment 1 is that, in this embodiment, at least one positioning surface 104 is formed on the outer peripheral surface of the sensor body 10. Preferably, as follows... Figures 6 to 9 As shown, two symmetrically arranged positioning surfaces 104 are provided on the outer peripheral surface of the sensor body 10. The two positioning surfaces 104 can be set at any position on the circumferential surface of the sensor body 10. When the size of the sensor is small, such as when the diameter of the sensor body 10 is less than 5mm, the positioning surfaces 104 are set at a position away from the first pin hole 102 and the second pin hole 103.

[0080] Preferably, for ease of processing, the positioning surface 104 is a plane. In this way, the positioning surface 104 can be clamped by the positioning fixture, and multiple eddy current sensors can be positioned at the same time, so as to facilitate the batch insertion of multiple eddy current sensors. The positioning surface 104 can also be a stepped surface or a curved surface, as long as it is used with the corresponding positioning fixture to achieve the positioning of the eddy current sensor.

[0081] In this application, in order to facilitate the batch insertion of multiple eddy current sensors, the positioning surface 104 is a plane and is parallel to the line connecting the center of the first pin hole 102 and the center of the second pin hole 103.

[0082] Example 3:

[0083] Based on the above embodiment 1 or 2, this embodiment differs from embodiment 1 or 2 in that, in this embodiment, as... Figures 10 to 14As shown, the first wire-passing channel 203 is disposed on the outer periphery of the winding body 201 and extends along the axial direction of the winding body 201; the second wire-passing channel 101 is disposed on the outer periphery of the sensor body 10 and extends along the axial direction of the sensor body 10. The first wire-passing channel 203 and the second wire-passing channel 101 are interconnected, and the two ends of the wire pass through the first wire-passing channel 203 and the second wire-passing channel 101 in sequence, reach the end of the sensor body 10, and are fixed on the first guide and the second guide.

[0084] Preferably, there are two first wire-passing channels 203 and two second wire-passing channels 101, and they are arranged symmetrically along the axis. The second wire-passing channel 101 is arranged in a one-to-one correspondence with the first wire-passing channel 203, and the two extend in the same direction and are interconnected, which facilitates the wires to pass through the first wire-passing channel 203 and the second wire-passing channel 101.

[0085] To facilitate the laying of wires, such as Figure 13 As described above, a fourth wire-passing channel 105 is also provided on the end face of the sensor body 10. The fourth wire-passing channel 105 extends along the direction of the first pin hole 102 and the second pin hole 103, and connects to the second wire-passing channel 101. The wire enters the fourth wire-passing channel 105 from the second wire-passing channel 101 and is fixed on the first and second guides. At this time, a third wire-passing channel 303 may or may not be provided on the adjustment part 30. If the adjustment part 30 is provided with a third wire-passing channel 303, the third wire-passing channel 303 and the adjustment slot 302 can be adapted to various adjustment tools.

[0086] Example 4:

[0087] An exemplary embodiment of this application provides a method for assembling an eddy current sensor, the method comprising the following steps:

[0088] Step S1: The wire is wound into the winding groove 202 to form a sensor coil; at this time, the formed sensor coil has two free ends.

[0089] Step S2: The two ends of the coil are respectively threaded into the first threading channel 203; preferably, there are two first threading channels 203. When the first threading channel 203 extends radially along the winding body 201, the second threading channel is located inside the sensor body 10 and penetrates the sensor body 10 towards the adjustment part 30. At this time, the two ends of the coil are first threaded into the elliptical process groove, then into the first threading channel 203 respectively, and then into the second threading channel 101. When the first threading channel 203 is located on the outer periphery of the winding body 201, the second threading channel 101 is located on the outer periphery of the sensor body 10 and extends along the axial direction of the sensor body 10; the first threading channel 203 and the second threading channel 101 are interconnected, and the two ends of the wire sequentially pass through the first threading channel 203 and enter the second threading channel 101; since the first threading channel 203 and the second threading channel 101 are both located on their respective outer peripheral surfaces, this threading method is simple and convenient.

[0090] Step S3: Insert both ends of the coil into the second threading channel 101 and out of the second threading channel 101 respectively;

[0091] Step S4: Pass the two ends of the coil into the third wire-passing channel 303 or the fourth wire-passing channel 105 respectively. When the first wire-passing channel 203 extends radially along the winding body 201 and the second wire-passing channel is located inside the sensor body 10, the two ends of the coil passing through the second wire-passing channel 101 are respectively passed into the third wire-passing channel 303; when the first wire-passing channel 203 is located on the outer periphery of the winding body 201 and the second wire-passing channel 101 is located on the outer periphery of the sensor body 10, the two ends of the coil are respectively passed into the fourth wire-passing channel 105.

[0092] In step S5, the first guide pin is inserted into the first pin hole 102, and the second guide pin is inserted into the second pin hole 103. After the two ends of the coil pass through the third wire channel 303 or the fourth wire channel 105, the two ends of the coil are fixed to the first and second guide pins respectively. This method of fixing the coil ends via the guide pins and pin holes not only allows for convenient and quick coil fixing, but also provides a detachable connection between the guide pins and pin holes, facilitating adjustment of the number of coil turns and thus adjusting the sensor's accuracy. The assembly steps of this eddy current sensor are simple, the assembly method is straightforward, and the assembled sensor structure is stable, improving the sensor's performance.

[0093] In this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0094] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0095] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if these modifications and variations fall within the scope of the claims of this application and their equivalents, the intent of this application also includes these modifications and variations.

Claims

1. An eddy current sensor for a magnetic levitation motor, characterized in that, It includes a sensor body (10), a winding part (20), a wire, a first guide, a second guide, and an adjustment part (30); The winding portion (20) and the adjusting portion (30) are respectively disposed at both ends of the sensor body (10); the winding portion (20) includes a winding body (201), and a winding groove (202) is formed on the outer peripheral surface of the winding body (201); at least one first wire passage (203) is formed between the winding groove (202) and the sensor body (10); the wire is wound in the winding groove (202) to form a sensor coil; the two ends of the wire are respectively fixed on the first guide and the second guide; The outer peripheral surface of the sensor body (10) is provided with threads; at least one second wire channel (101) is formed on the sensor body (10); the second wire channel (101) extends toward the adjustment part (30) and passes through the sensor body (10); a first pin hole (102) and a second pin hole (103) arranged at intervals are formed on one end face of the sensor body (10) near the adjustment part (30). The first guide is inserted into the first pin hole (102), and the second guide is inserted into the second pin hole (103); the adjustment part (30) has an adjustment slot (302) adapted to the shape of the adjustment tool. The sensor body (10), the winding part (20), and the adjustment part (30) are integrally formed; the sensor mounting hole is provided with a thread that matches the thread on the sensor body (10); when installed in the sensor mounting hole of the magnetic levitation motor, the winding part (20) is oriented towards the rotor, and the adjustment part (30) is oriented away from the rotor.

2. The eddy current sensor for a magnetic levitation motor according to claim 1, characterized in that, The adjustment part (30) includes an adjustment body (301) on which a third threading channel (303) is formed; the third threading channel (303) extends in the direction of the first pin hole (102) and the second pin hole (103) and passes through the adjustment body (301).

3. The eddy current sensor for a magnetic levitation motor according to claim 2, characterized in that, The height of the bottom wall of the third threading channel (303) is lower than the height of the bottom wall of the adjusting slot (302).

4. The eddy current sensor for a magnetic levitation motor according to claim 2, characterized in that, The adjusting body (301) is a cylinder, a frustum, a prism, or an elliptical cylinder.

5. The eddy current sensor for a magnetic levitation motor according to claim 1, characterized in that, The adjustment slot (302) is a straight slot, a cross-shaped slot, a star-shaped slot, a hexagonal slot, or a cross-shaped slot.

6. The eddy current sensor for a magnetic levitation motor according to claim 1, characterized in that, The first threading channel (203) extends radially along the winding body (201).

7. The eddy current sensor for a magnetic levitation motor according to claim 6, characterized in that, The second wire channel (101) is disposed inside the sensor body (10) and extends along the axial direction of the sensor body (10); the second wire channel (101) communicates with the first wire channel (203).

8. The eddy current sensor for a magnetic levitation motor according to claim 7, characterized in that, The second threading channel (101) extends toward the winding portion (20) and penetrates the winding portion (20).

9. The eddy current sensor for a magnetic levitation motor according to claim 1, characterized in that, The first threading channel (203) is disposed on the outer periphery of the winding body (201) and extends along the axial direction of the winding body (201).

10. The eddy current sensor for a magnetic levitation motor according to claim 9, characterized in that, The second wire channel (101) is disposed on the outer periphery of the sensor body (10) and extends along the axial direction of the sensor body (10).

11. The eddy current sensor for a magnetically levitated motor according to any one of claims 1 to 8, characterized in that, There are two first threading channels (203); the two first threading channels (203) are arranged at intervals.

12. The eddy current sensor for a magnetic levitation motor according to claim 11, characterized in that, The two first threading channels (203) are symmetrically arranged.

13. The eddy current sensor for a magnetic levitation motor according to claim 11, characterized in that, There are two second threading channels (101); the second threading channel (101) is set in correspondence with the first threading channel (203), and the two extend in the same direction.

14. The eddy current sensor for a magnetic levitation motor according to claim 1, characterized in that, The first pin hole (102) and the second pin hole (103) are respectively disposed on both sides of the adjustment slot (302).

15. The eddy current sensor for a magnetic levitation motor according to any one of claims 14, characterized in that, The first pin hole (102) and the second pin hole (103) are symmetrically arranged.

16. The eddy current sensor for a magnetic levitation motor according to claim 1, characterized in that, The first pin hole (102) and the second pin hole (103) are located on one side of the adjustment slot (302).

17. The eddy current sensor for a magnetically levitated motor according to any one of claims 14 to 16, characterized in that, The first pin hole (102) and the second pin hole (103) are located between the outer peripheral surface of the adjustment part (30) and the outer peripheral surface of the sensor body (10).

18. The eddy current sensor for a magnetic levitation motor according to claim 1, characterized in that, At least one positioning surface (104) is formed on the outer peripheral surface of the sensor body (10).

19. The eddy current sensor for a magnetic levitation motor according to claim 18, characterized in that, Two symmetrically arranged positioning surfaces (104) are provided on the outer peripheral surface of the sensor body (10).

20. A method for assembling an eddy current sensor for a magnetic levitation motor as described in any one of claims 1 to 19, characterized in that, The assembly method includes the following steps: Step S1: The wire is wound inside the winding groove (202) to form a sensor coil; Step S2: Insert both ends of the coil into the first threading channel (203) respectively. Step S3: Insert both ends of the coil into the second threading channel (101) respectively. Step S4: Thread the two ends of the coil into the third threading channel (303) or the fourth threading channel (105) respectively. Step S5: Insert the first guide into the first pin hole (102), insert the second guide into the second pin hole (103), and fix the two ends of the coil onto the first guide and the second guide respectively.

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