A superconducting rotor drive device

Abstract

This invention discloses a superconducting rotor drive device, relating to the field of superconducting rotor drive technology. The superconducting rotor drive device includes: a superconducting rotor, a stator winding, an optical fiber probe, an optical fiber detection circuit, and a drive power supply. The stator winding is disposed on the side of the superconducting rotor; the optical fiber probe is disposed above the superconducting rotor, and the optical fiber probe, optical fiber detection circuit, drive power supply, and stator winding are connected sequentially. The optical fiber detection circuit generates pulse signals based on the rotational speed signal and relative angular position detected by the optical fiber probe; wherein, the relative angular position is the relative angular position between the superconducting rotor and the stator winding; the drive power supply supplies or de-energizes the stator winding according to the pulse signals, thereby driving the speed change of the superconducting rotor. Compared with devices using stator coils and torque converters, or only the torque converter placed in a cylindrical hole inside the rotor sphere, this invention simplifies the structure of the superconducting rotor drive device, thereby improving its accuracy potential.

Description

Technical Field

[0001] This invention relates to the field of superconducting rotor drive technology, and in particular to a superconducting rotor drive device. Background Technology

[0002] High-speed rotating rotors possess axial stability, a property that allows for the fabrication of high-precision angular velocity sensors. Superconductors in their superconducting state experience magnetic pressure on their surface in a magnetic field due to the Meissner effect; this effect can be used to provide contactless support and rotation of the superconducting rotor. Furthermore, materials exhibit minimal expansion, creep, and chemical reactivity at low temperatures, resulting in extremely high precision potential for superconducting rotor levitation devices. The drive system for the superconducting rotor is one of the core technologies for the normal operation of a superconducting rotor levitation device. A typical superconducting rotor drive system includes the superconducting rotor, a superconducting torque converter, and superconducting drive coils. The torque converter maintains the vertical position of the superconducting rotor, while the drive coils apply rotation to it.

[0003] Most of the existing publicly disclosed superconducting rotor magnetic levitation devices employ stator coils and torque generators, or only place the torque generator in a cylindrical hole inside the rotor ball. The rotor and drive structures of such devices are very complex, which limits further improvement in their accuracy. Summary of the Invention

[0004] The purpose of this invention is to provide a superconducting rotor drive device that simplifies the structure of the superconducting rotor drive device, thereby improving its precision potential.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] A superconducting rotor drive device includes: a superconducting rotor, a stator winding, an optical fiber probe, an optical fiber detection circuit, and a drive power supply;

[0007] The stator winding is disposed on the side of the superconducting rotor; the fiber optic probe is disposed above the superconducting rotor, and the fiber optic probe, the fiber optic detection circuit, the drive power supply and the stator winding are connected in sequence.

[0008] The fiber optic probe is used to detect the rotational speed signal and relative angular position of the superconducting rotor; the relative angular position is the relative angular position of the superconducting rotor and the stator winding.

[0009] The fiber optic detection circuit is used to generate a pulse signal based on the rotation speed signal and the relative angular position;

[0010] The driving power supply is used to supply or de-energize the stator winding according to the pulse signal, thereby driving the speed change of the superconducting rotor.

[0011] Optionally, the superconducting rotor drive device further includes: a drive circuit; the fiber optic detection circuit is connected to the drive power supply through the drive circuit;

[0012] The driving circuit is used to generate a driving signal according to the pulse signal and send the driving signal to the driving power supply;

[0013] The driving power supply supplies or de-energizes the stator winding according to the driving signal, thereby driving the speed change of the superconducting rotor.

[0014] Optionally, the superconducting rotor is a spherical rotor, and eight circular planes are uniformly cut at the equator of the superconducting rotor.

[0015] Optionally, the top of the superconducting rotor is provided with an eight-pattern and a rotational speed pattern;

[0016] The eight patterns include: eight spherical fan-shaped patterns without apex angles, and the rotational pattern is a spherical fan-shaped pattern with apex angles; the circumferential angle of the projection of the spherical fan-shaped pattern without apex angles onto the equatorial plane of the superconducting rotor and the circumferential angle of the projection of the spherical fan-shaped pattern with apex angles onto the equatorial plane are both 22.5°.

[0017] The outer edge of the rotational speed pattern is tangent to the inner edge of the eight patterns. The angle bisector of the circumference of the rotational speed pattern projected onto the equatorial plane is aligned with the projection of one side of a cornerless spherical fan-shaped pattern of the eight patterns onto the equatorial plane. One cornerless spherical fan-shaped pattern is correspondingly arranged with one circular plane. The projection of one side of each cornerless spherical fan-shaped pattern onto the equatorial plane coincides with the perpendicular bisector of the corresponding circular plane.

[0018] Optionally, the fiber optic probe includes: a rotation speed probe and an eight-pattern probe; the rotation speed probe is disposed above the rotation speed pattern, and the eight-pattern probe is disposed above the eight-pattern.

[0019] The rotation speed probe is used to detect the rotation speed signal;

[0020] The octagonal probe is used to detect the relative angular position.

[0021] Optionally, the stator winding includes four hollow cylindrical stator coils;

[0022] All the stator coils are uniformly and correspondingly arranged with respect to the circular plane.

[0023] Optionally, the line connecting the projection of the rotation speed probe on the equatorial plane and the projection of the eight-pattern probe on the equatorial plane passes through the center of the superconducting rotor; the equatorial plane is the equatorial plane of the superconducting rotor.

[0024] Optionally, the distance from each of the circular planes to the center of the superconducting rotor is 24 mm.

[0025] Optionally, the stator coil has an outer diameter of 10 mm, an inner diameter of 6 mm, and a height of 3.9 mm.

[0026] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0027] This invention discloses a superconducting rotor drive device, comprising: a superconducting rotor, a stator winding, an optical fiber probe, an optical fiber detection circuit, and a drive power supply; the stator winding is disposed on the side of the superconducting rotor; the optical fiber probe is disposed above the superconducting rotor, and the optical fiber probe, the optical fiber detection circuit, the drive power supply, and the stator winding are sequentially connected; the optical fiber detection circuit generates a pulse signal based on the rotational speed signal and relative angular position detected by the optical fiber probe; wherein, the relative angular position is the relative angular position between the superconducting rotor and the stator winding; the drive power supply supplies or de-energizes the stator winding according to the pulse signal, thereby driving the speed change of the superconducting rotor. Compared with devices that use stator coils and torque converters, or only the torque converter is placed in a cylindrical hole inside the rotor ball, this invention simplifies the structure of the superconducting rotor drive device, thereby improving its accuracy potential. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of the superconducting rotor drive device provided in an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of a superconducting rotor provided in an embodiment of the present invention;

[0031] Figure 3 A top view of a superconducting rotor provided in an embodiment of the present invention;

[0032] Figure 4 This is a timing diagram of the acceleration logic signal when the superconducting rotor rotates counterclockwise.

[0033] Figure 5 This is a timing diagram of the deceleration logic signal when a superconducting rotor rotates counterclockwise.

[0034] Figure 6 This is a timing diagram of the acceleration logic signal when the superconducting rotor rotates clockwise.

[0035] Figure 7This is a timing diagram of the deceleration logic signal when a superconducting rotor rotates clockwise.

[0036] Figure 8 The phase relationship diagram between the speed pattern signal and the eight-pattern signal when the superconducting rotor rotates counterclockwise is shown.

[0037] Figure 9 The phase relationship diagram between the rotational speed pattern signal and the eight-pattern signal when the superconducting rotor rotates clockwise is shown.

[0038] Figure 10 This is a diagram showing the output signal when the superconducting rotor rotates counterclockwise.

[0039] Figure 11 This is a diagram of the output signal when the superconducting rotor rotates clockwise.

[0040] Figure descriptions: 1-Superconducting rotor, 2-Stator winding, 3-Fiber optic probe, 4-Fiber optic detection circuit, 5-Oscilloscope, 6-Drive power supply, 7-Drive circuit, 8-Eight-pattern, 9-Speed ​​pattern, 10-Speed ​​probe, 11-Eight-pattern probe. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] The purpose of this invention is to provide a superconducting rotor drive device, which aims to achieve a simple structure and high precision for superconducting rotor drive devices and can be applied to the field of superconducting rotor drive technology.

[0043] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] Figure 1 This is a schematic diagram of the structure of a superconducting rotor drive device provided in an embodiment of the present invention. Figure 1 As shown, the superconducting rotor drive device in this embodiment includes: a superconducting rotor 1, a stator winding 2, an optical fiber probe 3, an optical fiber detection circuit 4, and a drive power supply 6.

[0045] The stator winding 2 is located on the side of the superconducting rotor 1; the fiber optic probe 3 is located above the superconducting rotor 1, and the fiber optic probe 3, the fiber optic detection circuit 4, the drive power supply 6 are connected to the stator winding 2 in sequence.

[0046] The fiber optic probe 3 is used to detect the rotational speed signal and relative angular position of the superconducting rotor 1; the relative angular position is the relative angular position between the superconducting rotor 1 and the stator winding 2.

[0047] The fiber optic detection circuit 4 is used to generate pulse signals based on the rotation speed signal and the relative angular position.

[0048] The drive power supply 6 is used to supply or de-energize the stator winding 2 according to the pulse signal, thereby driving the speed change of the superconducting rotor 1.

[0049] As an optional implementation, the superconducting rotor drive device further includes: a drive circuit 7; and an optical fiber detection circuit 4 connected to the drive power supply 6 via the drive circuit 7.

[0050] The drive circuit 7 is used to generate a drive signal based on the pulse signal and send the drive signal to the drive power supply 6.

[0051] The drive power supply 6 supplies or cuts off power to the stator winding 2 according to the drive signal, thereby driving the speed change of the superconducting rotor 1.

[0052] Specifically, the fiber optic detection circuit 4 is also connected to the oscilloscope 5. The fiber optic detection circuit 4 is also used to send the rotation speed signal and relative angular position to the oscilloscope 5, and the oscilloscope 5 is used to display the rotation speed signal and relative angular position.

[0053] like Figure 2 As shown, as an optional implementation, the superconducting rotor 1 is a spherical rotor, and eight circular planes are uniformly cut at the equator of the superconducting rotor 1.

[0054] Specifically, the superconducting rotor 1 is a hollow thin-walled niobium sphere with a radius (outer diameter) of 25 mm, thickened at the equator (compared to other locations, the wall thickness at the equator is 3 mm). The superconducting rotor 1 has 8 cutting planes at the equator, and the distance from the cutting planes to the center of the sphere is 24 mm.

[0055] like Figure 3 As shown, as an optional implementation, the top of the superconducting rotor 1 is provided with an eight-pattern 8 and a rotational pattern 9.

[0056] The eight patterns 8 include: eight spherical fan-shaped patterns without apex angles, and the rotational pattern 9 is a spherical fan-shaped pattern with apex angles; the circumferential angle of the projection of the spherical fan-shaped pattern without apex angles onto the equatorial plane of the superconducting rotor and the circumferential angle of the projection of the spherical fan-shaped pattern with apex angles onto the equatorial plane are both 22.5°.

[0057] The outer edge of the rotational pattern 9 is tangent to the inner edge of the eight-pattern 8. The angle bisector of the circumference of the projection of the rotational pattern 9 onto the equatorial plane is aligned with the projection of one side of a cornerless spherical fan-shaped pattern of the eight-pattern 8 onto the equatorial plane. A cornerless spherical fan-shaped pattern is set correspondingly to a circular plane, and the projection of one side of each cornerless spherical fan-shaped pattern onto the equatorial plane coincides with the perpendicular bisector of the corresponding circular plane.

[0058] Specifically, the top is a spherical cap surface centered at the intersection of the rotation axis of the superconducting rotor 1 and the spherical surface. The rotation axis is the principal inertial axis (Z-axis) of the superconducting rotor 1, which is the axis where the diameter of the sphere with eight cutting surfaces is rotationally symmetrical.

[0059] As an optional implementation, the fiber optic probe 3 includes: a rotational speed probe 10 and an eight-pattern probe 11; the rotational speed probe 10 is positioned above the rotational speed pattern 9, and the eight-pattern probe 11 is positioned above the eight-pattern 8.

[0060] The speed probe 10 is used to detect the speed signal.

[0061] The eight-pattern probe 11 is used to detect relative angular positions.

[0062] Specifically, the position of the fiber optic probe 3 is determined based on the position of the stator winding 2, and the fiber optic probe 3 is coplanar with the common perpendicular bisector of a pair of stator coils that are symmetrical about the superconducting rotor 1.

[0063] As an alternative implementation, the stator winding 2 includes four hollow cylindrical stator coils.

[0064] All stator coils are evenly and correspondingly positioned on the circular plane.

[0065] As an optional implementation, the line connecting the projection of the rotational speed probe 10 onto the equatorial plane and the projection of the eight-pattern probe 11 onto the equatorial plane passes through the center of the superconducting rotor 1; the equatorial plane is the equatorial plane of the superconducting rotor 1.

[0066] As an optional implementation, the distance from each circular plane to the center of the superconducting rotor 1 is 24 mm.

[0067] As an optional implementation, the stator coil has an outer diameter of 10 mm, an inner diameter of 6 mm, and a height of 3.9 mm.

[0068] Specifically, the stator coil is a hollow cylindrical coil wound with 0.17mm diameter niobium-titanium wire. The outer diameter of the stator coil is 10mm, the inner diameter is 6mm, and the height is 3.9mm. The bottom surfaces of the four stator coils can be directly aligned with the cutting surface of the superconducting rotor 1 during the rotation process, and the distance from the geometric center of the stator coil to the center of the superconducting rotor 1 is 28.15mm.

[0069] Each stator coil has two paths (double winding). One path is always energized during the driving process to maintain the vertical state of the rotor, acting as a torque converter, i.e., the stator-center path; the other path is energized according to a certain timing sequence during the driving process to add rotation to the superconducting rotor 1, i.e., the driving path, forming an integrated stator-torque converter structure. The driving path and stator-center path of the four stator coils are connected in series to form one path.

[0070] The working process of the superconducting rotor drive device includes:

[0071] The laser emitter in the fiber optic probe 3 emits a laser beam that illuminates the top of the superconducting rotor 1. The receiver in the fiber optic probe 3 receives the reflected signal from the top of the superconducting rotor 1. If the laser beam directly illuminates the surface of the superconducting rotor 1, specular reflection occurs. If the laser beam illuminates the pattern (rotational pattern 9 and eight-pattern 8), diffuse reflection occurs. The fiber optic probe 3 transmits the received reflected signal to the fiber optic detection circuit 4 through the fiber bundle. When specular reflection occurs, the fiber optic detection circuit 4 outputs a high level "1". When diffuse reflection occurs, the fiber optic detection circuit 4 outputs a low level "0" ("1" and "0" are pulse signals). After receiving the drive signal from the superconducting rotor 1, the drive circuit 7 controls the switching of the drive power supply 6 to the stator coil within a specific range ("0" represents "disconnected" and "1" represents "energized"), thereby realizing the acceleration and deceleration of the superconducting rotor 1.

[0072] If the position of the cutting plane of the superconducting rotor 1 directly opposite the stator coil is set as the initial position 0°, then the superconducting rotor 1 rotates within the following ranges: 0°-22.5°, 45°-67.5°, 90°-112.5°, 135°-157.5°, 180°-202.5°, 225°-247.5°, 270°-292.5°, and 315°-337.5°. At these ranges, the fiber optic detection circuit 4 outputs a low level (logic "0"). When the angles are -45°, 67.5°-90°, 112.5°-135°, 157.5°-180°, 202.5°-225°, 247.5°-270°, 292.5°-315°, and 337.5°-360°, the fiber optic detection circuit 4 outputs a high level (logic "1"); the drive circuit 7 outputs "0" to control the drive power supply 6 to stop supplying power to the stator coils, and outputs "1" to indicate that the drive power supply 6 is supplying power to the stator coils. Figures 4-7 As shown, the drive circuit 7 includes built-in logic timing signals (including acceleration logic timing signals for counter-clockwise rotation, deceleration logic timing signals for counter-clockwise rotation, acceleration logic timing signals for clockwise rotation, and deceleration logic timing signals for clockwise rotation). Figures 4-7 In the diagram, the horizontal axis is a multiple of 22.5 degrees; each low level and each high level corresponds to 22.5 degrees, and a low level and a high level are 45 degrees apart. Figures 8-9As shown, when the superconducting rotor 1 rotates counterclockwise and clockwise (viewed from the top of the superconducting rotor 1), the phase relationship between the speed pattern signal and the eight-pattern signal is as follows: when rotating counterclockwise, the speed pattern signal and the eight-pattern signal intersect at the rising edge; when rotating clockwise, the speed pattern signal and the eight-pattern signal intersect at the falling edge.

[0073] The driving methods for superconducting rotor drive devices include:

[0074] Step 1: After the superconducting rotor 1 floats, the stator coil is energized to ensure the rotor remains vertical.

[0075] Step 2: The stator coil drive circuit excites the superconducting rotor 1 with a large pulse signal, causing the superconducting rotor 1 to rotate. The fiber optic detection circuit 4 then... Figures 10-11 The output signal diagram shown when the superconducting rotor 1 rotates measures the direction of rotation of the superconducting rotor 1 and the relative position information between the superconducting rotor 1 and the stator winding 2, and transmits the signal to the drive circuit 7. The drive circuit 7 controls the drive power supply 6 to energize or de-energize the superconducting rotor 1 according to the designed timing information based on its direction of rotation and relative position information, thereby realizing the drive of the superconducting rotor 1. The fiber optic detection circuit 4 determines the direction of rotation (clockwise or counterclockwise rotation) of the superconducting rotor 1 based on the phase relationship between the eight-pattern 8 and the rotational speed pattern 9. Then, by controlling the drive circuit 7 and changing the energizing timing of the stator coil, it can realize whether to apply a driving torque or a resisting torque to the superconducting rotor 1, thereby realizing the drive and acceleration / deceleration of the superconducting rotor 1.

[0076] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0077] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the device and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A superconducting rotor drive apparatus, characterized by, The application relates to a superconducting motor, which comprises a superconducting rotor, a stator winding, a fiber probe, a fiber detection circuit and a driving power supply. The stator winding is arranged on the side of the superconducting rotor; the fiber probe is arranged above the superconducting rotor; the fiber probe, the fiber detection circuit, the driving power supply and the stator winding are sequentially connected. The fiber probe is used for detecting a rotating speed signal of the superconducting rotor and a relative angle position; the relative angle position is the relative angle position between the superconducting rotor and the stator winding. The fiber detection circuit is used for generating a pulse signal according to the rotating speed signal and the relative angle position. The driving power supply is used for supplying power or cutting off power to the stator winding according to the pulse signal, so as to drive the speed change of the superconducting rotor. The superconducting rotor is a spherical rotor, and eight circular planes are uniformly cut on the equator of the superconducting rotor. Eight patterns and a rotating speed pattern are arranged on the top of the superconducting rotor. The eight patterns comprise eight top-angle-free spherical sector patterns, and the rotating speed pattern is a top-angle spherical sector pattern; the circumferential angle of the top-angle-free spherical sector pattern projected on the equator plane and the circumferential angle of the top-angle spherical sector pattern projected on the equator plane are both 22.5 degrees. The outer edge of the rotating speed pattern is tangent to the inner edge of the eight patterns; the angle bisector of the circumferential angle of the rotating speed pattern projected on the equator plane is aligned with the projection of one side of one top-angle-free spherical sector pattern on the equator plane; one top-angle-free spherical sector pattern is correspondingly arranged with one circular plane, and the projection of one side of each top-angle-free spherical sector pattern on the equator plane is coincident with the perpendicular bisector of the corresponding circular plane. The application further comprises a driving circuit.

2. The superconducting rotor drive apparatus of claim 1, wherein The fiber detection circuit is connected with the driving power supply through the driving circuit. The driving circuit is used for generating a driving signal according to the pulse signal and sending the driving signal to the driving power supply. The driving power supply supplies power or cuts off power to the stator winding according to the driving signal, so as to drive the speed change of the superconducting rotor. The fiber probe comprises a rotating speed probe and an eight-pattern probe; the rotating speed probe is arranged above the rotating speed pattern, and the eight-pattern probe is arranged above the eight patterns. The rotating speed probe is used for detecting the rotating speed signal.

3. The superconducting rotor drive apparatus of claim 1, wherein The eight-pattern probe is used for detecting the relative angle position. The stator winding comprises four hollow cylindrical stator coils. All the stator coils are uniformly and correspondingly arranged with the circular planes.

4. The superconducting rotor drive apparatus of claim 1, wherein The connecting line of the projection of the rotating speed probe on the equator plane and the projection of the eight-pattern probe on the equator plane passes through the spherical center of the superconducting rotor; the equator plane is the equator plane of the superconducting rotor. The distance from each circular plane to the spherical center of the superconducting rotor is 24 mm.

5. The superconducting rotor drive apparatus of claim 3, wherein The outer diameter of the stator coil is 10 mm, the inner diameter is 6 mm, and the height is 3.9 mm.

6. The superconducting rotor drive of claim 1, wherein, ​ 7. The superconducting rotor drive of claim 4, wherein, ​

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