A two-phase 16 / 18-pole bearingless switched reluctance motor

Abstract

The application discloses a two-phase 16 / 18-pole bearingless switched reluctance motor, which comprises a stator, a suspension coil, a torque coil, a rotor and a rotating shaft, the rotor is arranged in the stator, the rotor is sleeved on the rotating shaft, the stator comprises eight wide teeth and eight narrow teeth, two adjacent wide teeth form a wide tooth group, two adjacent narrow teeth form a narrow tooth group, and four wide tooth groups and four narrow tooth groups are alternately arranged in space; one suspension coil is wound on each wide tooth, and two suspension coils on each wide tooth group are connected in series to form a suspension winding group; one torque coil is wound on each narrow tooth, and the torque coils on each narrow tooth group are connected in series to form a torque coil string; two torque coil strings which are 180 degrees apart in space are connected to form an A-phase and a B-phase torque winding group. The application is of a multi-rotor tooth structure, which is beneficial to reducing torque ripple and increasing output power; the torque and suspension magnetic circuits are both short magnetic circuit structures, which are beneficial to reducing core loss.

Description

Technical Field

[0001] This invention relates to the field of magnetic levitation switched reluctance motors, and more particularly to a two-phase 16 / 18-pole bearingless switched reluctance motor. Background Technology

[0002] Bearingless switched reluctance motors integrate levitation and rotation, and are a new type of magnetic levitation motor developed in recent years. They can not only effectively solve the problems of loss and heat generation caused by bearing friction when the motor is running at high speed, but also further enhance the high-speed adaptability of switched reluctance motors, thereby strengthening their application foundation in high-speed fields such as aerospace, flywheel energy storage, and ships.

[0003] Traditional bearingless switched reluctance motors suffer from severe coupling between torque and levitation force, and the effective output ranges of torque and levitation force conflict. Their rotational and levitation performance requires a trade-off, preventing them from fully utilizing their torque and levitation force capabilities and hindering their application expansion. In recent years, some novel decoupled magnetic levitation switched reluctance motors have been developed, which have solved the torque-levitation force coupling problem to some extent, but the issue of low motor power remains.

[0004] To address this, scholars both domestically and internationally have proposed numerous novel bearingless switched reluctance motor topologies with naturally decoupled torque and levitation force in their structure. A typical example is the 8 / 10 and 12 / 14 pole motors with wide and narrow tooth structures proposed by South Korean scholars, both exhibiting decoupling. However, the torque and levitation magnetic circuits of the 8 / 10 and 12 / 14 pole bearingless switched reluctance motors are both long magnetic circuits, and coupling exists between them, limiting their widespread application. Summary of the Invention

[0005] Purpose of the invention: The purpose of this invention is to provide a two-phase 16 / 18-pole bearingless switched reluctance motor that isolates the torque magnetic circuit from the suspension magnetic circuit, thereby improving the suspension control accuracy.

[0006] Technical solution: A two-phase 16 / 18-pole bearingless switched reluctance motor, including a stator, a suspension coil, a torque coil, a rotor, and a shaft. The rotor is arranged inside the stator and is sleeved on the shaft. The stator includes eight wide teeth and eight narrow teeth. Two adjacent wide teeth form a wide tooth group, and two adjacent narrow teeth form a narrow tooth group. The four wide tooth groups and the four narrow tooth groups are arranged alternately in space.

[0007] Each of the wide teeth has a levitation coil wound around it, and two levitation coils on each wide tooth group are connected in series to form a levitation winding;

[0008] Each narrow tooth has a torque coil wound on it, and the torque coils on each narrow tooth group are connected in series to form a torque coil string; two torque coils that are 180° apart in space are connected in series to form a torque winding, namely the A-phase torque winding and the B-phase torque winding.

[0009] Furthermore, the width of the wide teeth is equal, and the polar arc angle of the wide teeth is 360° / 18°; the width of the narrow teeth is equal.

[0010] Furthermore, the rotor has a salient pole structure with 18 teeth; the 18 rotor teeth are evenly arranged on the circumference, with a tooth-to-tooth ratio of 360° / 18.

[0011] Furthermore, there are four suspension windings in total, namely a horizontal positive direction suspension winding, a vertical positive direction suspension winding, a horizontal negative direction suspension winding, and a vertical negative direction suspension winding; the magnetic flux generated by each suspension winding passes through the wide tooth, air gap, rotor tooth, adjacent rotor tooth, air gap, adjacent wide tooth, stator yoke, and finally back to the wide tooth to form a closed loop.

[0012] Furthermore, the two narrow teeth in the narrow tooth group are spatially separated by 360° / 18°; the two wide teeth in the wide tooth group are spatially separated by θ = 2T. r -β, where θ is the spatial difference between the centerlines of the two wide teeth in the wide tooth group, T r T is a rotor cycle angle. r =360° / 18, where β is the rotor pole arc angle.

[0013] Furthermore, the four wide tooth groups are spatially separated by 90°, with their center lines located at 0°, 90°, 180°, and 270°, respectively; the four narrow tooth groups are also spatially separated by 90°, with their center lines located at 45°, 135°, 225°, and 315°, respectively; the positive horizontal direction is defined as the 0° position, and counterclockwise is defined as the positive direction of the position angle.

[0014] A two-phase 16 / 18-pole bearingless switched reluctance motor includes a stator, a suspension coil, a torque coil, a rotor, and a shaft. The rotor is arranged inside the stator and sleeved on the shaft. The stator consists of eight non-magnetic sector-shaped support frames, four C-type torque tooth structures, and four C-type suspension tooth structures. The four C-type torque tooth structures and four C-type suspension tooth structures are arranged alternately in space, and a non-magnetic sector-shaped support frame is closely arranged between a spatially adjacent C-type torque tooth structure and a C-type suspension tooth structure.

[0015] Each tooth of the C-type levitation tooth structure is wound with a levitation coil, and the two levitation coils on each C-type levitation tooth structure are connected in series to form a levitation winding.

[0016] Each tooth of the C-type torque tooth structure is wound with a torque coil, and two torque coils on each C-type torque tooth structure are connected in series to form a torque coil string; two torque coils that are spatially 180° apart are connected in series to form a torque winding, namely the A-phase torque winding and the B-phase torque winding.

[0017] Furthermore, each of the C-type torque tooth structures includes two narrow teeth, and each C-type suspension tooth structure includes two wide teeth; the two narrow teeth in the C-type torque tooth structure are spatially separated by 360° / 18; the two wide teeth in the C-type suspension tooth structure are spatially separated by: θ = 2T r -β, where θ is the spatial difference between the center lines of the two wide teeth in the wide tooth group, T r T is a rotor cycle angle. r =360° / 18, where β is the rotor pole arc angle.

[0018] Furthermore, the width of the wide teeth is equal, and the polar arc angle of the wide teeth is 360° / 18°; the width of the narrow teeth is equal.

[0019] Furthermore, the four C-shaped suspension tooth structures are spatially separated by 90°, with their center lines located at 0°, 90°, 180°, and 270° positions, respectively; the four C-shaped torque tooth structures are also spatially separated by 90°, with their center lines located at 45°, 135°, 225°, and 315° positions, respectively; the positive horizontal direction is defined as the 0° position, and counterclockwise is defined as the positive direction of the position angle.

[0020] Compared with the prior art, the significant advantages of this invention are as follows:

[0021] 1. In this invention, the torque magnetic circuit and the levitation magnetic circuit are isolated from each other and have no coupling. The torque and levitation force are naturally decoupled in structure, which can simplify the levitation control algorithm and improve the levitation control accuracy.

[0022] 2. Both the torque magnetic circuit and the suspension magnetic circuit are short magnetic circuit structures, and the direction of magnetic flux in the stator yoke does not change during motor operation, which helps to further reduce stator core losses;

[0023] 3. The structure is simple, with only one coil wound on each tooth, making it convenient to process and assemble. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present invention.

[0025] Figure 2 This is a schematic diagram of the radial suspension control flux generated by the radial suspension winding current in Embodiment 1 of the present invention.

[0026] Figure 3 This is a schematic diagram of the magnetic flux generated by the A-phase winding current when the rotor is in an misaligned position in Embodiment 1 of the present invention.

[0027] Figure 4 This is a schematic diagram of the magnetic flux generated by the A-phase winding current when the rotor is in the aligned position in Embodiment 1 of the present invention.

[0028] Figure 5 This is a three-dimensional structural diagram of Embodiment 2 of the present invention.

[0029] Figure 6 This is a schematic diagram of the radial suspension control flux generated by the radial suspension winding current in Embodiment 2 of the present invention.

[0030] Figure 7 This is a schematic diagram of the magnetic flux generated by the A-phase winding current when the rotor is in an misaligned position in Embodiment 2 of the present invention.

[0031] Figure 8 This is a schematic diagram of the magnetic flux generated by the A-phase winding current when the rotor is in the aligned position in Embodiment 2 of the present invention.

[0032] Explanation of reference numerals in the attached figures: Figures 1 to 8 In the diagram, 1 is the stator, 2 is the levitation coil, 3 is the torque coil, 4 is the rotor, 5 is the shaft, 6 is the non-magnetic sector support frame, 7 is the levitation control flux generated by the levitation winding in Example 1, 8 is the first torque control flux generated by the A-phase torque winding in the misaligned position, 9 is the second torque control flux generated by the A-phase torque winding in the aligned position, i1+, i2+, i3+, i4+ are the current flowing into the levitation winding, and i1-, i2-, i3-, i4- are the current flowing out of the levitation winding. a + represents the current flowing into the A-phase torque winding, i a - is the current flowing out of the A-phase torque winding, i b + represents the current flowing into the B-phase torque winding, i b - represents the current flowing out of the B-phase torque winding. X, Y, and Z are the three axes of a rectangular coordinate system, where the X-axis is located in the horizontal direction, the Y-axis is located in the vertical direction, and the Z-axis is located in the axial direction. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0034] Example 1

[0035] like Figure 1 The diagram shown is a three-dimensional structural schematic of Embodiment 1 of the present invention, including a stator 1, a suspension coil 2, a torque coil 3, a rotor 4, and a rotating shaft 5. X, Y, and Z are the three coordinate axes of a rectangular coordinate system, wherein the X-axis is located in the horizontal direction, the Y-axis is located in the vertical direction, and the Z-axis is located in the axial direction.

[0036] Stator 1 has a salient pole structure and 16 stator teeth. Stator 1 includes two tooth profiles: wide tooth 21 and narrow tooth 22, with eight wide teeth 21 and eight narrow teeth 22 respectively.

[0037] The eight wide teeth (21) have equal tooth widths, and the polar arc angle of the wide teeth is 360° / 18, which is 20°; the eight narrow teeth (22) have equal tooth widths.

[0038] Rotor 4 has a salient pole structure with 18 teeth; the 18 rotor teeth are evenly arranged on the circumference, and the teeth are 360° / 18, or 20° apart;

[0039] When the stator 1 is an integral structure, eight wide teeth 21 and eight narrow teeth 22 form a whole; two wide teeth 21 are arranged adjacently to form a wide tooth group, for a total of four wide tooth groups; two narrow teeth 22 are arranged adjacently to form a narrow tooth group, for a total of four narrow tooth groups; the four wide tooth groups and the four narrow tooth groups are arranged alternately in space.

[0040] The two narrow teeth in the narrow tooth group are spatially separated by 360° / 18, or 20°; the two wide teeth in the wide tooth group are spatially separated by θ = 2T. r -β, where θ is the spatial difference between the centerlines of the two wide teeth in the wide tooth group, T r One rotor cycle angle, i.e., T r =360° / 18, where β is the rotor pole arc angle, determined by motor performance indicators and optimized design.

[0041] The four wide tooth groups are spatially separated by 90°, with their center lines located in the positive horizontal direction (0° position), positive vertical direction (90° position), negative horizontal direction (180° position), and negative vertical direction (270° position), respectively. The four narrow tooth groups are also spatially separated by 90°, with their center lines located at 45°, 135°, 225°, and 315°, respectively. The positive horizontal direction is defined as the 0° position, and counterclockwise is defined as the positive direction of the position angle.

[0042] The rotor 4 is arranged inside the stator 1 and is mounted on the rotating shaft 5.

[0043] Each wide tooth has one suspension coil wound on it, for a total of eight; two suspension coils on each wide tooth group are connected in series to form a suspension winding, for a total of four, namely a horizontal positive direction suspension winding, a vertical positive direction suspension winding, a horizontal negative direction suspension winding, and a vertical negative direction suspension winding.

[0044] Each narrow tooth has one torque coil wound on it, for a total of eight; the torque coils on each narrow tooth group are connected in series to form a torque coil string, for a total of four; two torque coil strings that are spatially 180° apart are connected in series to form a torque winding, for a total of two, namely A-phase torque winding 31 and B-phase torque winding 32; as follows Figure 3 As shown.

[0045] like Figure 2 The diagram shown is a schematic diagram of the levitation control magnetic flux according to Embodiment 1 of the present invention, where the levitation control magnetic flux 7 is generated by the levitation current. The X-axis is defined as being in the horizontal direction, the Y-axis as being in the vertical direction, and the Z-axis as being in the axial direction.

[0046] The levitation coils on each wide-tooth group are connected in series to form a levitation winding, with a total of four: a horizontal positive levitation winding, a vertical positive levitation winding, a horizontal negative levitation winding, and a vertical negative levitation winding. The magnetic flux generated by the four levitation windings during excitation is distributed in the direction of NSSNNSSN. The magnetic flux generated by each levitation winding passes through the wide teeth, air gap, rotor teeth, adjacent rotor teeth, air gap, adjacent wide teeth, stator yoke, and finally back to the wide teeth to form a closed loop. That is, a closed loop is formed between each pair of wide teeth in each group, for a total of four.

[0047] Since the pole arc angle of the wide-toothed coil is equal to one rotor cycle angle, the magnetic reluctance of the four levitation magnetic circuits remains constant and does not change with rotor rotation. This ensures that the inductance of the levitation windings is constant, and the torque generated by the levitation winding current is zero, thus achieving a natural decoupling of torque and levitation force in the structure.

[0048] like Figure 3 The figure shows the first torque control flux 8 generated when the A-phase torque winding 31 current is in the misaligned position of the rotor in Embodiment 1 of the present invention. Figure 4 The diagram shows the magnetic flux generated when the rotor is in the aligned position. The second torque control flux 9 is generated by the current in phase A torque winding 31 when the rotor is in the aligned position. The X-axis is defined as horizontal, the Y-axis as vertical, and the Z-axis as axial.

[0049] When the current applied to phase A of the torque winding is i a When current is applied to the phase A winding, a bipolar symmetrical magnetic flux will be generated, which will be distributed in an NSSN pattern on the four rotor teeth. Each loop consists of: narrow tooth, air gap, rotor, air gap, adjacent narrow tooth, stator yoke, and then closes at the narrow tooth. This magnetic flux is a short magnetic circuit distribution. Similarly, when current is applied to the phase B torque winding, a bipolar symmetrical short magnetic circuit flux will also be generated.

[0050] Example 2

[0051] like Figure 5The figure shown is a three-dimensional structural schematic diagram of Embodiment 2 of the present invention. A two-phase 16 / 18-pole bearingless switched reluctance motor includes a stator 1, a suspension coil 2, a torque coil 3, a rotor 4, a rotating shaft 5, and a non-magnetic sector support frame 6. X, Y, and Z are the three coordinate axes of a rectangular coordinate system.

[0052] Stator 1 has a salient pole structure and 16 stator teeth; Stator 1 includes two tooth profiles: wide tooth 21 and narrow tooth 22, with eight wide teeth and eight narrow teeth respectively;

[0053] The eight wide teeth (21) have equal tooth widths, and the polar arc angle of the wide teeth is 360° / 18, which is 20°; the eight narrow teeth (22) have equal tooth widths.

[0054] The rotor has a salient pole structure with 18 teeth; the 18 rotor teeth are evenly arranged on the circumference, and the teeth are 360° / 18, or 20° apart;

[0055] When the stator 1 is a segmented structure, the stator 1 consists of eight non-magnetic sector support frames 6, four C-type torque tooth structures and four C-type suspension tooth structures; the four C-type torque tooth structures 11 and the four C-type suspension tooth structures 12 are arranged alternately in space, and a non-magnetic sector support frame 6 is closely arranged between a C-type torque tooth structure 11 and a C-type suspension tooth structure 12 that are adjacent in space.

[0056] Each C-type torque tooth structure 11 includes two narrow teeth, and each C-type suspension tooth structure 12 includes two wide teeth; the two narrow teeth in the C-type torque tooth structure 11 are spatially separated by 360° / 18, or 20°, and the two wide teeth in the C-type suspension tooth structure 12 are spatially separated by: θ = 2T r -β, where θ is the spatial difference between the center lines of the two wide teeth in the wide tooth group, T r One rotor cycle angle, i.e., T r =360° / 18, where β is the rotor pole arc angle, determined by motor performance indicators and optimized design.

[0057] The four C-shaped suspension tooth structures 12 are spatially separated by 90°, with their center lines located at the positive horizontal direction (0° position), positive vertical direction (90° position), negative horizontal direction (180° position), and negative vertical direction (270° position), respectively. The four C-shaped torque tooth structures 11 are also spatially separated by 90°, with their center lines located at 45°, 135°, 225°, and 315° positions, respectively. The positive horizontal direction is defined as the 0° position, and counterclockwise is defined as the positive direction of the position angle.

[0058] The rotor 4 is arranged inside the stator 1, and the rotor 4 is mounted on the rotating shaft 5;

[0059] Each tooth of the C-type levitation tooth structure 12 has a levitation coil wound on it, for a total of eight; two levitation coils on each C-type levitation tooth structure 12 are connected in series to form a levitation winding, for a total of four, namely a horizontal positive direction levitation winding, a vertical positive direction levitation winding, a horizontal negative direction levitation winding, and a vertical negative direction levitation winding.

[0060] Each tooth of the C-type torque tooth structure 11 has a torque coil wound on it, totaling eight; two torque coils on each C-type torque tooth structure 11 are connected in series to form a torque coil string, totaling four; two torque coil strings that are spatially 180° apart are connected in series to form a torque winding, totaling two, namely the A-phase torque winding 31 and the B-phase torque winding 32; as shown Figure 7 As shown.

[0061] like Figure 6 The diagram shown is a schematic diagram of the levitation control magnetic flux in Embodiment 2 of the present invention, where the levitation control magnetic flux 7 is generated by the levitation current. The X-axis is defined as being in the horizontal direction, the Y-axis as being in the vertical direction, and the Z-axis as being in the axial direction.

[0062] Each tooth of each C-type levitation tooth structure 12 has a levitation coil wound on it, for a total of eight. Two levitation coils on each C-type levitation tooth structure 12 are connected in series to form a levitation winding, for a total of four, namely a horizontal positive levitation winding, a vertical positive levitation winding, a horizontal negative levitation winding, and a vertical negative levitation winding. The magnetic flux generated by the four levitation windings when energized is distributed in the NSSNNSSN pattern. The magnetic flux generated by each levitation winding passes through the wide tooth, air gap, rotor tooth, adjacent rotor tooth, air gap, adjacent wide tooth, stator yoke, and finally back to the wide tooth to form a closed loop. That is, each C-type levitation tooth structure 12 forms a closed loop, for a total of four.

[0063] Since the pole arc angle of the wide-toothed coil is equal to one rotor cycle angle, the magnetic reluctance of the four levitation magnetic circuits remains constant and does not change with rotor rotation. This ensures that the inductance of the levitation windings is constant, and the torque generated by the levitation winding current is zero, thus achieving a natural decoupling of torque and levitation force in the structure.

[0064] like Figure 7 As shown, this is the first torque control flux 8 generated when the current of the A-phase torque winding 31 is in the misaligned position of the rotor in Embodiment 2 of the present invention. Figure 8 The diagram shows the magnetic flux generated when the rotor is in the aligned position. The second torque control flux 9 is generated by the current in phase A torque winding 31 when the rotor is in the aligned position. The X-axis is defined as horizontal, the Y-axis as vertical, and the Z-axis as axial.

[0065] When the current applied to the A-phase torque winding is i aWhen current is applied to the phase A torque winding, a bipolar symmetrical magnetic flux will be generated. This flux will be distributed in an NSSSN pattern on the four rotor teeth of the phase A torque winding. Each circuit consists of: narrow tooth, air gap, rotor, air gap, adjacent narrow tooth, stator yoke, and then closes at the narrow tooth. This flux is a short magnetic circuit distribution. Similarly, when current is applied to the phase B torque winding, a bipolar symmetrical short magnetic circuit flux will also be generated.

[0066] Those skilled in the art will readily conceive of other advantages and variations based on the above embodiments. Therefore, this invention is not limited to the specific examples described above, but is merely an example to illustrate one aspect of the invention in detail. Without departing from the spirit of this invention, all technical solutions obtained by those skilled in the art through various equivalent substitutions based on the above specific examples should be included within the scope of the claims of this invention and their equivalents.

Claims

1. A two-phase 16 / 18-pole bearingless switched reluctance motor comprising a stator (1), a suspension coil (2), a torque coil (3), a rotor (4) and a rotation shaft (5), characterized in that, The rotor (4) is arranged inside the stator (1) and the rotor (4) is sleeved on the rotating shaft (5). The stator (1) includes eight wide teeth (21) and eight narrow teeth (22). Two adjacent wide teeth form a wide tooth group, and two adjacent narrow teeth form a narrow tooth group. The four wide tooth groups and the four narrow tooth groups are arranged alternately in space. Each of the wide teeth (21) is wound with a suspension coil (2), and the two suspension coils (2) on each wide tooth group are connected in series to form a suspension winding; there are four suspension windings in total, namely a horizontal positive direction suspension winding, a vertical positive direction suspension winding, a horizontal negative direction suspension winding and a vertical negative direction suspension winding; the magnetic flux generated by each suspension winding passes through the wide teeth, air gap, rotor teeth, adjacent rotor teeth, air gap, adjacent wide teeth, stator yoke, and finally back to the wide teeth to form a closed loop; Each narrow tooth (22) has a torque coil (3) wound on it, and the torque coils (3) on each narrow tooth group are connected in series to form a torque coil string; two torque coil strings that are 180° apart in space are connected to form a torque winding, namely the A-phase torque winding and the B-phase torque winding.

2. The two-phase 16 / 18-pole bearingless switched reluctance motor according to claim 1, characterized in that, The width of the wide teeth (21) is equal, and the polar arc angle of the wide teeth (21) is 360° / 18; the width of the narrow teeth (22) is equal.

3. The two-phase 16 / 18-pole bearingless switched reluctance motor according to claim 1, characterized in that, The rotor (4) has a salient pole structure with 18 teeth; the 18 rotor teeth are evenly arranged on the circumference, and the teeth are 360° / 18 apart.

4. The two-phase 16 / 18-pole bearingless switched reluctance motor according to claim 1, characterized in that, The two narrow teeth (22) in the narrow tooth group are spatially separated by 360° / 18; the two wide teeth (21) in the wide tooth group are spatially separated by: Where θ is the spatial difference between the center lines of two wide teeth in the wide tooth group, and T r T is a rotor cycle angle. r =360° / 18, where β is the rotor pole arc angle.

5. The two-phase 16 / 18-pole bearingless switched reluctance motor according to claim 1, characterized in that, The four wide tooth groups are spatially different The center lines of the four wide tooth groups are located at 0°, 90°, 180° and 270° respectively; the four narrow tooth groups are spatially separated by 90°, and the center lines of the four narrow tooth groups are located at 45°, 135°, 225° and 315° respectively; the positive horizontal direction is defined as the 0° position, and the positive counterclockwise direction is defined as the position angle.

6. A two-phase 16 / 18-pole bearingless switched reluctance motor, comprising a stator (1), a suspension coil (2), a torque coil (3), a rotor (4), and a shaft (5), characterized in that, The rotor (4) is arranged inside the stator (1) and is sleeved on the rotating shaft (5). The stator (1) consists of eight non-magnetic sector support frames (6), four C-type torque tooth structures (11), and four C-type suspension tooth structures (12). The four C-type torque tooth structures (11) and four C-type suspension tooth structures (12) are arranged alternately in space, and a non-magnetic sector support frame (6) is closely arranged between a C-type torque tooth structure (11) and a C-type suspension tooth structure (12) that are adjacent in space. Each C-type torque tooth structure (11) includes two narrow teeth, and each C-type suspension tooth structure (12) includes two wide teeth. Each tooth of the C-type levitation tooth structure (12) is wound with a levitation coil, totaling eight; two levitation coils on each C-type levitation tooth structure (12) are connected in series to form a levitation winding, totaling four, namely a horizontal positive direction levitation winding, a vertical positive direction levitation winding, a horizontal negative direction levitation winding, and a vertical negative direction levitation winding; the magnetic flux generated by the four levitation windings when energized is distributed in the NSSNNSSN pattern; the magnetic flux generated by each levitation winding passes through the wide tooth, air gap, rotor tooth, adjacent rotor tooth, air gap, adjacent wide tooth, stator yoke, and finally back to the wide tooth to form a closed loop; Each tooth of the C-type torque tooth structure (11) is wound with a torque coil, and two torque coils on each C-type torque tooth structure (11) are connected in series to form a torque coil string; two torque coils that are 180° apart in space are connected in series to form a torque winding, namely the A-phase torque winding and the B-phase torque winding.

7. The two-phase 16 / 18-pole bearingless switched reluctance motor according to claim 6, characterized in that, The two narrow teeth in the C-type torque tooth structure (11) are spatially separated by 360° / 18; the two wide teeth in the C-type suspension tooth structure (12) are spatially separated by: Where θ is the spatial difference between the centerlines of the two wide teeth in the C-type suspended tooth structure, and T r T is a rotor cycle angle. r =360° / 18, where β is the rotor pole arc angle.

8. The two-phase 16 / 18-pole bearingless switched reluctance motor according to claim 7, characterized in that, The wide teeth have equal tooth widths and a polar arc angle of 360° / 18°; the narrow teeth have equal tooth widths.

9. The two-phase 16 / 18-pole bearingless switched reluctance motor according to claim 6, characterized in that, The four C-shaped suspension tooth structures (12) are spatially separated by 90°, and the center lines of the four C-shaped suspension tooth structures (12) are located at 0°, 90°, 180° and 270° respectively; the four C-shaped torque tooth structures (11) are spatially separated by 90°, and the center lines of the four C-shaped torque tooth structures (11) are located at 45°, 135°, 225° and 315° respectively; the positive horizontal direction is defined as the 0° position, and the counterclockwise direction is defined as the positive direction of the position angle.

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