Magnetic levitation electric motor with integrated winding, magnetic levitation apparatus, and method for winding integrated winding

Abstract

Disclosed in the present invention are a magnetic levitation electric motor with an integrated winding, a magnetic levitation apparatus, and a method for winding an integrated winding. A stator comprises 2N+2 stator cores, N being a non-zero natural number; a coil is correspondingly wound on each stator core, and each coil is provided with a coil lead-in end and a coil lead-out end; a plurality of coils, which are spaced apart by a certain angle on a circumference where the stator cores are located, are connected in series to form at least one phase of winding; in the same phase of winding, a plurality of coils are sequentially and continuously wound by means of the same enameled wire to form an integrated winding; each phase of winding is provided with a common lead-in end and a common lead-out end; the at least one phase of winding is configured to be a suspension winding and / or a rotary winding; and in an energized state, coils opposite each other on each phase of suspension winding have the same magnetic-field direction, and coils opposite each other on each phase of rotary winding have opposite magnetic-field directions. A plurality of coils are continuously wound and connected in series by means of the same enameled wire to form an integrated winding, thereby reducing the number of welding spots of the winding, saving on welding man-hours, and reducing labor costs.

Description

Integrated winding magnetic levitation motor, magnetic levitation equipment and integrated winding winding method Technical Field

[0001] The present invention relates to the technical field of magnetic suspension devices, and in particular to an integrated winding magnetic suspension motor, magnetic suspension equipment and an integrated winding winding method. Background Art

[0002] A bearingless motor is an electromagnetic rotary drive in which the rotor is supported on the stator in a contactless manner by magnetic force. The rotor does not have a separate magnetic bearing. Bearingless technology is used to achieve active suspension of the rotor in rotation and radial direction. The magnetic circuit formed by the mechanical structure realizes passive suspension of the other three degrees of freedom in addition to the radial and rotor rotational degrees of freedom. It has the characteristics of high cleanliness, no precipitation, no particles, no dynamic seals, and superior performance. It has good application prospects in ultra-pure drive fields such as biochemistry, medicine, and semiconductor manufacturing.

[0003] Typically, a magnetic levitation motor includes a magnetic levitation stator and a magnetic levitation rotor. The magnetic levitation rotor can be an integral rotor. For example, in a magnetic levitation pump, the magnetic levitation rotor serves as both the rotor of the magnetic levitation motor and the rotor of the pump. It can be, for example, a permanent magnet rotor, a short-circuited cage rotor, or a reluctance rotor. The magnetic levitation stator typically includes a stator yoke, a number of stator teeth, and winding coils wound around the stator teeth. For example, in a magnetic levitation pump, the magnetic levitation stator serves as both a rotationally driven stator and a magnetically suspended stator. The stator winding coils can generate a rotating magnetic field. This magnetic field, on the one hand, exerts rotation on the rotor, thereby enabling its rotation about a desired rotation axis, and on the other hand, exerts a levitation force. This levitation force can be applied to the rotor as needed, allowing its radial position to be actively controlled or adjusted. Thus, three degrees of freedom of the rotor can be actively adjusted: its rotation and its radial position (two degrees of freedom). With respect to the other three degrees of freedom: its position in the axial direction and its tilt relative to a radial plane perpendicular to the desired rotation axis (two degrees of freedom), the rotor is passively magnetically levitated or stabilized by reluctance force.

[0004] Existing magnetic levitation motors include multiple stator cores, each of which is wound with a corresponding suspension coil and a rotating coil. In a dual-winding magnetic levitation motor, multiple suspension coils and multiple rotating coils are included, and the suspension coils and rotating coils are independent coils. The suspension coils are typically divided into a multi-phase, multi-pole structure, and the rotating coils are typically divided into a multi-phase, multi-pole structure. A single-phase winding contains multiple coils. Within a single-phase winding, the multiple coils are often wound individually, each with its own lead-in and lead-out wires. The lead-out wire of one coil is connected to the lead-in wire of the next coil via a flexible wire. This requires welding the connection points between each coil, resulting in two weld points between adjacent coils. As shown in Figure 1, 1' in Figure 1 represents the weld point between two adjacent windings. Multiple coils are connected together via multiple weld points to achieve interconnection between the multiple coils in each phase winding, thereby ensuring the stability of the stator. However, this coil winding processing method will cause inconvenience in stator processing and manufacturing. Each phase suspension winding inevitably has multiple welding points. During manufacturing and processing, multiple coils need to be connected together one by one, resulting in low production efficiency and a significant increase in welding hours, which further increases labor costs. In addition, the coils are connected together by welding, and there are quality problems caused by welding defects, which in turn affect the working performance of the suspension coil.

[0005] Summary of the Invention

[0006] In order to overcome the defects in the prior art, embodiments of the present invention provide an integrated winding magnetic levitation motor, a magnetic levitation device and an integrated winding winding method, which are used to solve at least one of the above problems.

[0007] The embodiments of the present application disclose an integrated winding magnetic levitation motor, a magnetic levitation device and an integrated winding winding method. The multiple coils of each phase winding are formed by continuously winding in sequence using the same enameled wire and connected in series to form an integrated winding, avoiding the need in the prior art to connect the lead-in wire and the lead-out wire between two adjacent coils in each phase winding by connecting them with a soft wire and then welding them together. The integrated winding reduces the number of welding points in the middle of the winding and avoids quality problems and product performance problems caused by defects in the welding connection between the coils. There is no need to weld between the windings of the same phase. The winding of the same phase has only one common lead-in end and common lead-out end as a whole, which effectively saves workers' welding hours, improves work efficiency and reduces labor costs; avoids the use of soft wires and saves internal space.

[0008] Among them, the integrated winding magnetic levitation motor described in the present application includes a stator and a rotor, and the stator includes 2N+2 stator cores distributed in a circular pattern, where N is a non-zero natural number, and a coil is wound on each stator core, each of which has a coil lead-in end and a coil lead-out end. It is characterized in that multiple coils spaced at a certain angle on the circumference of the stator core are connected in series to form at least one phase winding. In the same phase winding, the coil lead-out end of one coil is connected to the coil lead-in end of the adjacent coil, and multiple coils are continuously wound in sequence through the same enameled wire to form an integrated winding. The winding of each phase is configured to have a common lead-in end and a common lead-out end. The at least one phase winding is configured as a suspension winding and / or a rotating winding. When powered on, the magnetic field directions of the two opposing coils in the suspension winding of each phase are the same, and the magnetic field directions of the two opposing coils in the rotating winding of each phase are opposite.

[0009] Furthermore, the suspension winding includes a plurality of suspension coils, each stator core corresponds to one suspension coil, the suspension coils are wound along the axis direction of the stator core, and the plurality of suspension coils are configured as a multi-phase suspension winding.

[0010] Furthermore, the number of layers of the suspension coil wound on the radial plane is configured to be an even number, and the coil lead-in end and the coil lead-out end of each suspension coil are located in the same radial plane.

[0011] Furthermore, in the same phase suspension winding, the coil lead-in ends and coil lead-out ends of the plurality of suspension coils are configured to be located in the same radial plane, and the winding directions of two adjacent suspension coils are opposite, so that the magnetic field directions of the adjacent suspension coils are opposite.

[0012] Furthermore, in the same-phase suspension winding, the winding directions of the plurality of suspension coils are the same, and the coil lead-in ends of two adjacent suspension coils are located in different radial planes.

[0013] Furthermore, the number of layers of the suspension coil wound on the radial plane is an odd number, and the coil lead-in end and the coil lead-out end of each suspension coil are located in different radial planes.

[0014] Furthermore, in the same phase suspension winding, the winding directions of the plurality of suspension coils are the same, and the coil lead-out end of one suspension coil and the coil lead-in end of an adjacent suspension coil are located in the same radial plane.

[0015] Furthermore, on a radial plane, the number of turns of each layer of the suspension coil along the axial direction is consistent.

[0016] Furthermore, the suspension coil is configured as a stepped coil, the number of coil layers corresponding to the outermost step of the stepped coil is configured as an odd number, and the coil lead-in end and the coil lead-out end of the stepped coil are located on different radial planes; the number of coil layers corresponding to the outermost step of the stepped coil is configured as an even number, and the coil lead-in end and the coil lead-out end of the stepped coil are located on the same radial plane.

[0017] Furthermore, in the same phase suspension winding, the number of winding layers and the number of winding turns of each suspension coil are consistent, the coil lead-in ends of the plurality of suspension coils are located in the same radial plane, and the winding directions of two adjacent suspension coils are opposite.

[0018] Furthermore, the rotating winding includes a plurality of rotating coils, and the rotating coils are located below the suspension coils. One rotating coil is wound around each stator core, or one rotating coil is wound around every two adjacent stator cores.

[0019] Furthermore, in the rotating winding of the same phase, the winding directions of the two opposite rotating coils are opposite, and the coil lead-in ends of the two opposite rotating coils are located on the same radial plane; or,

[0020] In the rotating winding of the same phase, the winding directions of the two opposite rotating coils are the same, and the coil lead-in ends of the two opposite rotating coils are located on different radial planes.

[0021] Furthermore, the coil is configured as a round wire or a flat wire.

[0022] Furthermore, the magnetic levitation motor also includes a power amplifier circuit, and the common lead-in end and the common lead-out end of each phase levitation winding and each phase rotating winding are respectively electrically connected to the power amplifier circuit, and the power amplifier circuit configures a levitation current for levitation control to the levitation coil and configures a rotating current for rotation control to the rotating coil.

[0023] The present application also discloses a magnetic levitation device, including the above-mentioned integrated winding magnetic levitation motor.

[0024] The present application also discloses a method for winding an integrated winding of a magnetic levitation motor, comprising the following steps:

[0025] In the same phase winding, winding is started from the first coil of the winding, and the coil lead-in end of the first coil is configured as the common lead-in end;

[0026] After leaving a certain length of the lead-out end of the first coil as a connecting wire, start winding it as the lead-in end of the second coil. The second coil is connected in series with the first coil.

[0027] At least one phase winding is configured as a suspended winding and / or a rotating winding. In the suspended winding, the magnetic fields of two adjacent coils are directed in opposite directions and / or the magnetic fields of two opposing coils are directed in the same direction, and so on. In the rotating winding, the magnetic fields of two opposing coils are directed in opposite directions, and so on. The remaining coils in the same phase winding are wound, and the coil lead end of the last coil is configured as a common lead end.

[0028] Complete the winding of other phase windings using the same winding method.

[0029] The beneficial effects of the present invention are as follows:

[0030] The multiple coils of each phase winding are formed by continuously winding the same enameled wire in sequence and connecting them in series to form an integrated winding, which avoids the need to connect the lead-in wire and the lead-out wire between two adjacent coils in each phase winding in the prior art by connecting them with soft wires and then welding them together. The integrated winding reduces the number of welding points in the middle of the winding and avoids quality problems caused by defects in the welding connection between the coils. There is no need to weld between the windings of the same phase. The winding of the same phase has only one common lead-in end and common lead-out end as a whole, which effectively saves workers' welding time, improves work efficiency and reduces labor costs.

[0031] In order to make the above and other objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] FIG1 is a schematic diagram of the winding of a suspension winding in the prior art;

[0034] FIG2 is a top view of a winding of a phase suspension winding of an integrated winding magnetic suspension motor according to an embodiment of the present invention;

[0035] FIG3 is a schematic diagram of a winding of a single-phase suspension winding of an integrated winding magnetic suspension motor according to an embodiment of the present invention;

[0036] FIG4 is a schematic diagram of a winding expansion of a single-phase suspension winding of an integrated winding magnetic suspension motor according to an embodiment of the present invention;

[0037] FIG5 is another schematic diagram of winding expansion of a single-phase suspension winding of an integrated winding magnetic suspension motor according to an embodiment of the present invention;

[0038] FIG6 is another schematic diagram of winding expansion of a single-phase suspension winding of an integrated winding magnetic suspension motor according to an embodiment of the present invention;

[0039] FIG7 is another winding perspective view of a single-phase suspension winding of an integrated winding magnetic suspension motor according to an embodiment of the present invention;

[0040] FIG8 is another top view of a winding of a phase suspension winding of an integrated winding magnetic suspension motor according to an embodiment of the present invention;

[0041] FIG9 is another winding schematic diagram of a one-phase suspension winding of an integrated winding magnetic suspension motor according to an embodiment of the present invention;

[0042] 10 is a schematic diagram of the winding of the first type of suspension winding of the integrated winding magnetic levitation motor according to an embodiment of the present invention;

[0043] 11 is a schematic diagram of the levitation current input and output of the first type of levitation winding of the integrated winding magnetic levitation motor according to an embodiment of the present invention;

[0044] 12 is a schematic diagram of the winding of the first type of rotating winding of the integrated winding magnetic levitation motor according to an embodiment of the present invention;

[0045] 13 is a schematic diagram of the winding of the second type of suspension winding of the integrated winding magnetic levitation motor according to an embodiment of the present invention;

[0046] 14 is a schematic diagram of the winding of the second type of rotating winding of the integrated winding magnetic levitation motor according to an embodiment of the present invention;

[0047] FIG15 is a schematic structural diagram of an integrated winding magnetic levitation motor according to an embodiment of the present invention.

[0048] Reference numerals of the above drawings are: 1', welding point; 10, stator; 11, stator core; 12, suspension coil; 13, rotating coil; 14, enameled wire; 15, common lead-in terminal; 16, common lead-out terminal; 17, coil lead-in terminal; 18, coil lead-out terminal; 20, rotor; 30, power amplifier circuit. DETAILED DESCRIPTION

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0050] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention. The terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a system, product or device comprising a series of units is not necessarily limited to those units explicitly listed, but may include other units that are not explicitly listed or are inherent to these products or devices.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise explicitly specified.

[0052] The drawings in this disclosure are not drawn strictly to scale, and the specific size and quantity of each structure can be determined according to actual needs. The drawings described in this disclosure are only schematic diagrams.

[0053] As shown in Figure 1, existing magnetic levitation motors include multiple stator cores, each of which is wound with a corresponding suspension coil and a rotating coil. In a dual-winding magnetic levitation motor, multiple suspension coils and multiple rotating coils are included, and the suspension coils and rotating coils are independent coils. The suspension coils are typically divided into a multi-phase, multi-pole structure, and the rotating coils are typically divided into a multi-phase, multi-pole structure. A single-phase winding contains multiple coils. Each coil is typically wound individually, with separate lead-in and lead-out wires. The lead-out wire of one coil is connected to the lead-in wire of the next coil via a flexible wire. This requires welding to secure the connection points between each coil, resulting in two weld points between adjacent coils. As shown in Figure 1, 1' in Figure 1 represents the weld point between two adjacent suspension windings. Multiple coils are connected together through multiple weld points to ensure interconnection between the multiple coils in each phase of the suspension winding, thereby ensuring the stability of the stator. However, this coil winding processing method will cause inconvenience in stator processing and manufacturing. Each phase suspension winding inevitably has multiple welding points. During manufacturing and processing, multiple coils need to be connected together one by one, resulting in low production efficiency and a significant increase in welding hours, which further increases labor costs. In addition, the coils are connected together by welding, and there are quality problems caused by welding defects, which in turn affect the working performance of the suspension coil.

[0054] In order to solve the above problems, the present invention provides an integrated winding magnetic levitation motor and magnetic levitation equipment. The multiple coils of each phase winding are formed by continuously winding in sequence using the same enameled wire and connected in series to form an integrated winding, avoiding the need to connect the lead-in wire and the lead-out wire between two adjacent coils in each phase winding in the prior art by connecting them with a soft wire and then welding them together. The integrated winding reduces the number of welding points in the middle of the winding and avoids quality problems caused by defects in the welding connection between the coils; and there is no need to weld between the windings of the same phase. The winding of the same phase has only one common lead-in end and a common lead-out end as a whole, which effectively saves workers' welding time, improves work efficiency, and reduces labor costs.

[0055] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to Figures 2-15 and specific implementation methods.

[0056] Figure 1 is a schematic diagram of the winding of the suspension winding in the prior art; Figure 2 is a top view of a winding of a one-phase suspension winding of an integrated winding magnetic levitation motor in an embodiment of the present invention; Figure 3 is a schematic diagram of a winding of a one-phase suspension winding of an integrated winding magnetic levitation motor in an embodiment of the present invention; Figure 4 is a front view of a winding of a one-phase suspension winding of an integrated winding magnetic levitation motor in an embodiment of the present invention; Figure 5 is another front view of the winding of a one-phase suspension winding of an integrated winding magnetic levitation motor in an embodiment of the present invention; Figure 6 is another front view of the winding of a one-phase suspension winding of an integrated winding magnetic levitation motor in an embodiment of the present invention; Figure 7 is another schematic diagram of the winding of a one-phase suspension winding of an integrated winding magnetic levitation motor in an embodiment of the present invention; Figure 8 is a front view of a one-phase suspension winding of an integrated winding magnetic levitation motor in an embodiment of the present invention Another winding main view of the winding; Figure 9 is another winding schematic diagram of a one-phase suspension winding of the integrated winding magnetic levitation motor in an embodiment of the present invention; Figure 10 is a winding schematic diagram of the first suspension winding of the integrated winding magnetic levitation motor in an embodiment of the present invention; Figure 11 is a suspension current input and output schematic diagram of the first suspension winding of the integrated winding magnetic levitation motor in an embodiment of the present invention; Figure 12 is a winding schematic diagram of the first rotating winding of the integrated winding magnetic levitation motor in an embodiment of the present invention; Figure 13 is a winding schematic diagram of the second suspension winding of the integrated winding magnetic levitation motor in an embodiment of the present invention; Figure 14 is a winding schematic diagram of the second rotating winding of the integrated winding magnetic levitation motor in an embodiment of the present invention; Figure 15 is a structural schematic diagram of the integrated winding magnetic levitation motor in an embodiment of the present invention.

[0057] According to an embodiment of the present invention, a magnetic levitation motor with an integrated winding is provided. The magnetic levitation motor includes a stator 10 and a rotor 20. The stator 10 includes 2N+2 stator cores 11 distributed circumferentially, where N is a non-zero natural number. For a magnetic levitation motor used in a magnetic levitation pump, the stator 10 typically includes six or eight stator cores 11, with the six or eight stator cores 11 distributed equidistantly around the circumference. A coil is wound around each stator core 11, and each coil has a coil lead-out terminal 17 and a coil lead-out terminal 18. Multiple coils spaced at a certain angle around the circumference of the stator core are connected in series to form at least one phase winding. In the same phase winding, the coil lead-out terminal 18 of one coil is connected in series with the coil lead-out terminal 17 of an adjacent coil. The multiple coils in each phase winding are wound sequentially and continuously around the same enameled wire 14 to form an integrated winding. In other words, the phase winding is configured as an integrated winding. Each phase winding is configured to have a common lead-in terminal 15 and a common lead-out terminal 16. In this embodiment, at least one phase winding can be configured as a suspended winding, a rotating winding, or a combination of suspended and rotating windings. As shown in Figures 10(a) and 10(b), in the suspended winding, at least one phase includes both a single-phase winding and a two-phase or three-phase winding. In Figure 10(a), the suspended coils 12a, 12c, 12e, and 12g are a suspended winding for one phase, while in Figure 10(b), the suspended coils 12h, 12b, 12d, and 12f are a suspended winding for another phase. Similarly, the same applies to at least one phase rotating winding. When energized, the magnetic field directions between the opposing coils on each phase suspended winding are the same, while the magnetic field directions between the opposing coils on each phase rotating winding are opposite. Here, "opposite" means that the angle between the two coils is equal to 180°, which is equivalent to the diameter of the circle on which the stator core is located.

[0058] Specifically, in this embodiment, the coils can be configured as suspension coils 12. For a dual-winding magnetic levitation motor, a suspension coil 12 is wound around each stator core 11. Each suspension coil 12 has a coil lead-out terminal 17 and a coil lead-out terminal 18. The coil lead-out terminal 18 of one suspension coil 12 is connected in series with the coil lead-out terminal 17 of an adjacent suspension coil 12, so that multiple suspension coils 12 can form a single-phase suspension winding. For a stator 10 structure with eight stator cores 11, in a radial plane, multiple suspension coils 12 spaced at a certain angle are defined to form a single-phase suspension winding. That is, four suspension coils 12 spaced 90° apart form a single-phase suspension winding, as shown in FIG10 . For a stator 10 structure with six stator cores 11, in a radial plane, two suspension coils 12 spaced 180° apart form a single-phase suspension winding, as shown in FIG13 . The magnetic fields of the two opposing suspension coils 12 in a single-phase suspension winding have the same direction. The multiple suspension coils 12 on each phase suspension winding are formed by sequentially winding the same enameled wire 14. That is, after winding one enameled wire 14 to form one suspension coil 12, the enameled wire 14 is extended to the position of another suspension coil 12 after reserving a suitable length of connecting wire, and the other suspension coil 12 is wound. This process is repeated to form four suspension coils 12 of one phase suspension winding. The four suspension coils 12 are wound by one enameled wire 14 to form an integrated suspension winding. That is, in the embodiment, for the magnetic levitation motor with 8 stator cores, the 8 suspension windings are configured as a two-phase two-pole structure, one-phase suspension winding has a common lead-in end and a common lead-out end, and the other-phase suspension winding also has a common lead-in end and a common lead-out end, that is, the two-phase suspension windings have 2 common lead-in ends and 2 common lead-out ends, and the 2 common lead-in ends and the 2 common lead-out ends are all connected to the external control device, that is, there are 4 welding points. Compared with the prior art, one suspension winding has 8 welding points and two suspension windings have 16 welding points, a total of 12 welding points are reduced. The integrated winding of the present application greatly reduces the number of welding points, simplifies the manufacturing and processing technology, and improves work efficiency.

[0059] In this embodiment, the length of the connecting wire between two adjacent suspension coils 12 is reserved by those skilled in the art based on practical circumstances. Taking into account the actual space within the magnetic levitation motor, the connecting wire is reserved to an appropriate length, ensuring that the enameled wire 14 is not wasted and that it can be easily placed. Each phase of the integrated suspension winding is configured to have a common lead-in terminal 15 and a common lead-out terminal 16. Specifically, a single-phase suspension winding consisting of four suspension coils 12 has a common lead-in terminal 15 only on the first suspension coil 12 and a common lead-out terminal 16 on the fourth suspension coil 12. The common lead-in terminal 15 and the common lead-out terminal 16 are electrically connected to an external control device. When the magnetic levitation motor is energized, current flows from the first suspension coil 12 of each phase suspension winding, and the current flows sequentially through the remaining suspension coils 12. Specifically, for a magnetic levitation motor with 8 stator cores 11, every 4 levitation coils 12 form a phase levitation winding. Current is passed through the first levitation coil 12. The current on the first levitation coil 12 is counterclockwise. In order to ensure that the magnetic field directions between adjacent levitation coils 12 are opposite, the current on the second levitation coil 12 needs to be clockwise; in order to ensure that the magnetic field directions between the opposite levitation coils 12 are the same, the current on the third levitation coil 12 is counterclockwise, and the current on the fourth levitation coil 12 needs to be clockwise. As a result, on a single-phase levitation winding, the magnetic fields on the 4 levitation coils 12 can be distributed in an "NSNS" pattern, so that the magnetic field directions between adjacent levitation coils 12 are opposite, and the magnetic field directions between the opposite levitation coils 12 are the same. In this embodiment, multiple suspension coils 12 are formed by continuously winding the same enameled wire 14 in sequence and connecting them in series to form an integral winding, thereby reducing the number of welding points in the middle of the suspension winding and avoiding quality problems caused by defects in the welding connection between the suspension coils 12. In addition, there is no need to weld between the suspension windings of the same phase. The suspension winding of the same phase has only one common lead-in terminal 15 and common lead-out terminal 16 as a whole, which effectively saves workers' welding time, improves work efficiency, and reduces labor costs.

[0060] Specifically, in this embodiment, the suspension coil 12 is wound along the axis of the stator core 11. For a magnetic levitation pump, the stator core 11 can be configured as an L-shaped or flat pump annular stator core. For an L-shaped stator core 11, the stator core 11 has transverse arms and longitudinal arms. The suspension coil 12 is wound on the longitudinal arms. The enameled wire 14 is axially wound along the axis of the longitudinal arms from one end to the other, thereby forming a suspension coil 12. The axial direction is the direction indicated by i2 in Figure 5. The number of layers of the suspension coil 12 wound on the radial plane can be a single layer or a multi-layer structure. Furthermore, the number of layers of the suspension coil 12 wound on the radial plane can be an even number. Specifically, if the number of layers of the suspension coil 12 wound on the radial plane is two, the enameled wire 14 is wound clockwise from one end of the stator core 11 to the other end, and then from the other end to one end of the stator core 11, thereby forming a two-layer coil structure. In this embodiment, regardless of the effects of machining errors, each layer of suspension coil 12 in a radial plane has a consistent number of turns along the axial direction. This means that the suspension coil 12 achieves a 100% slot fill rate, ensuring that the coil lead end 17 and the coil lead end 18 of each suspension coil 12 are located in the same radial plane. Due to the influence of machining accuracy during the winding of the suspension coil 12, achieving a 100% slot fill rate is difficult for the suspension coil 12. However, a slot fill rate close to 100% is within the allowable error range and falls within the scope protected by this embodiment.

[0061] Specifically, in Example 1, referring to Figures 2-4 , the number of layers of suspension coils 12 wound on a radial plane is an even number. The coil lead-out ends 17 and 18 of each suspension coil 12 are located in the same radial plane. In the same phase suspension winding, the coil lead-out ends 17 and 18 of multiple suspension coils 12 are configured to all be located in the same radial plane, which is the direction i1 indicated in Figure 5 . Specifically, if the coil lead-out ends 17 and 18 of a suspension coil 12 are both located at their top ends, the common lead-in end 15 and common lead-out end 16 of the suspension winding for one phase, as well as the connecting wires, are also located at the top ends of the multiple suspension coils 12. If the coil lead-out ends 17 and 18 of a suspension coil 12 are both located at their bottom ends, the common lead-in end 15 and common lead-out end 16 of the suspension winding for one phase, as well as the connecting wires, are also located at the bottom ends of the multiple suspension coils 12. To ensure that the magnetic fields of two adjacent suspension coils 12 in a single-phase suspension winding are in opposite directions, while the magnetic fields of two opposing suspension coils 12 are in the same direction, the winding directions of the two adjacent suspension coils 12 are alternating, provided that the suspension coils 12 are wound around the same enameled wire 14 and the coil lead ends 17 and coil lead ends 18 are all located in the same radial plane. Specifically, one suspension coil 12 is wound counterclockwise, with current flowing in the coil 12 in the counterclockwise direction, while the adjacent suspension coil 12 is wound clockwise, with current flowing in the coil 12 in the clockwise direction. This ensures that the winding directions of the two adjacent suspension coils 12 are opposite, resulting in the magnetic fields of the adjacent suspension coils 12 exhibiting an "NS" or "SN" distribution, with opposite magnetic field directions. In this embodiment, the winding direction of the suspension coils 12 corresponds to the direction of current flow.

[0062] Further, referring to FIG9(a) and FIG9(b), the suspension coils 12 are defined as suspension coils 12a, suspension coils 12b, suspension coils 12c, suspension coils 12d, suspension coils 12e, suspension coils 12f, suspension coils 12g, and suspension coils 12h, respectively. The suspension coil 12a corresponds to the stator core No. 1, the suspension coil 12b corresponds to the stator core No. 2, the suspension coil 12c corresponds to the stator core No. 3, the suspension coil 12d corresponds to the stator core No. 4, the suspension coil 12e corresponds to the stator core No. 5, the suspension coil 12f corresponds to the stator core No. 6, the suspension coil 12g corresponds to the stator core No. 7, and the suspension coil 12h corresponds to the stator core No. 8. In FIG10(a), the suspension coils 12a, The suspension coil 12c, the suspension coil 12e and the suspension coil 12g form a single-phase suspension winding. The direction of the current flowing in the suspension coil 12a is counterclockwise, the direction of the current flowing in the suspension coil 12c is clockwise, the direction of the current flowing in the suspension coil 12e is counterclockwise, and the direction of the current flowing in the suspension coil 12g is clockwise. That is, the magnetic fields in the adjacent suspension coils 12a and 12c, the suspension coils 12c and 12e, and the suspension coils 12e and 12g are in opposite directions. The magnetic field direction of coil 12a is north pole, the magnetic field direction of suspension coil 12c is south pole, the magnetic field direction of suspension coil 12e is north pole, and the magnetic field direction of suspension coil 12g is south pole, that is, the magnetic field direction in the suspension winding of this phase presents an "NSNS" distribution; the magnetic field directions of the relative suspension coils 12a and 12e, and suspension coils 12c and 12g are the same, the magnetic field directions of suspension coils 12a and 12e are north pole, and the magnetic field directions of suspension coils 12c and 12g are south pole. In FIG10( b ), the suspension coil 12 b, the suspension coil 12 d, the suspension coil 12 f, and the suspension coil 12 h form a single-phase suspension winding. The current in the suspension coil 12 b flows counterclockwise, the current in the suspension coil 12 d flows clockwise, the current in the suspension coil 12 f flows counterclockwise, and the current in the suspension coil 12 h flows clockwise. That is, the adjacent suspension coils 12 b and 12 d, the suspension coil 12 d and 12 f, and the suspension coil 12 f and 12 h are aligned. The magnetic field directions are opposite. The magnetic field direction of the suspension coil 12b is the north pole, the magnetic field direction of the suspension coil 12d is the south pole, the magnetic field direction of the suspension coil 12f is the north pole, and the magnetic field direction of the suspension coil 12h is the south pole. That is, the magnetic field direction in the suspension winding of this phase is "NSNS" distribution; the magnetic field directions of the relative suspension coils 12b and 12f, and the suspension coils 12d and 12h are the same, the magnetic field directions of the suspension coils 12b and 12f are the north pole, and the magnetic field directions of the suspension coils 12d and 12h are the south pole.

[0063] Furthermore, the winding connection method of multiple suspension coils 12 in a single-phase suspension winding described in Example 1 is the most preferred embodiment. In this embodiment, since the coil lead-out ends 17 and the coil lead-out ends 18 of the multiple suspension coils 12 are all located in the same radial plane, the current loss is small when the current flows from one suspension coil 12 to the next suspension coil 12, thereby ensuring better magnetic properties of the suspension winding of this phase.

[0064] Specifically, in Example 2, referring to FIG5 , the number of layers of the suspension coil 12 wound on the radial plane is configured as an even number. The coil lead-out end 17 and the coil lead-out end 18 of each suspension coil 12 are located in the same radial plane. In the suspension winding of the same phase, the winding direction of multiple suspension coils 12 is the same. Furthermore, the winding direction of multiple suspension coils 12 can be wound in a clockwise direction or in a counterclockwise direction. The coil lead-in ends of two adjacent suspension coils are located in different radial planes. Specifically, if the coil lead-out end 17 and the coil lead-out end 18 of the first suspension coil 12 are both located at the first end of the stator core 11, then the coil lead-out end 17 and the coil lead-out end 18 of the adjacent suspension coil 12 are located at the second end of the stator core 11, that is, the two adjacent suspension coils 12 are centrally symmetrical. To ensure that the magnetic fields of two adjacent suspension coils 12 in a single-phase suspension winding are in opposite directions, while the magnetic fields of two opposing suspension coils 12 are in the same direction, when the same enameled wire 14 is used and the winding directions of multiple suspension coils 12 are the same, the placement of two adjacent suspension coils 12 is altered. Specifically, the two adjacent suspension coils 12 are arranged symmetrically, so that the current in one suspension coil 12 flows counterclockwise, while the current in the adjacent suspension coil 12 flows clockwise. This results in the magnetic fields of adjacent suspension coils 12 forming an "NS" or "SN" distribution, with opposite magnetic field directions. The remaining suspension coils 12 are arranged in the same manner. In this embodiment, after the suspension coils 12 are placed symmetrically, the direction of the corresponding winding direction of the suspension coils 12 is the direction of current flow. In this embodiment, the direction of current flow in a single-phase suspension winding is the same as in the first embodiment.

[0065] Specifically, in Example 3, referring to FIG6 , the suspension coil 12 is wound along the axis of the stator core 11. For a magnetic levitation pump, the stator core 11 is often L-shaped. The L-shaped stator core 11 has a transverse arm and a longitudinal arm, with the suspension coil 12 wound around the longitudinal arm. The enameled wire 14 is axially wound along the axis of the longitudinal arm from one end to the other, thereby forming a suspension coil 12. The number of layers of the suspension coil 12 wound in the radial plane can be a single layer or a multi-layer structure. Specifically, the number of layers of the suspension coil 12 wound in the radial plane is an odd number. If the number of layers of the suspension coil 12 wound in the radial plane is three, the enameled wire 14 is wound clockwise from one end of the stator core 11 to the other end, then from the other end to one end of the stator core 11, and then from one end to the other end of the stator core 11, thereby forming a three-layer coil structure. In this embodiment, regardless of the effects of machining errors, the number of turns of each layer of suspension coil 12 along the axial direction on a radial plane is consistent. This means that the suspension coil 12 achieves a 100% slot fill factor, ensuring that the coil lead end 17 and coil lead end 18 of each suspension coil 12 are located in the same radial plane. Due to the influence of machining accuracy during the winding of the suspension coil 12, it is difficult for the suspension coil 12 to achieve a 100% slot fill factor. However, a slot fill factor approaching 100% is within the tolerance range and falls within the scope protected by this embodiment. In this embodiment, since the number of layers of suspension coil 12 is an odd number, the coil lead end 17 and coil lead end 18 of each suspension coil 12 are located in different radial planes. If the slot fill factor approaches 100%, the axial distance between the coil lead end 17 and coil lead end 18 of the suspension coil 12 is substantially consistent with the winding height of the suspension coil 12. The first winding method: In the same phase suspension winding, multiple suspension coils 12 are wound in the same direction. To ensure that the magnetic fields of two adjacent suspension coils 12 in a single phase are in opposite directions, while the magnetic fields of two opposing suspension coils 12 are in the same direction, the placement of the two adjacent suspension coils 12, when wound on the same enameled wire 14 and with the same winding direction, is altered. This requires that the coil lead-out end of one suspension coil and the coil lead-in end of the adjacent suspension coil lie in the same radial plane, and / or the coil lead-in end of one suspension coil and the coil lead-in end of the opposing suspension coil lie in the same radial plane. This winding method includes three configurations: a single phase suspension winding with both adjacent and opposing suspension coils 12; only adjacent suspension coils 12; or only opposing suspension coils 12.The lead-in ends of two adjacent suspension coils 12 are located on opposite axial sides, so that the current in one suspension coil 12 flows counterclockwise, while the current in the adjacent suspension coil 12 flows clockwise. This results in the magnetic field of the adjacent suspension coils 12 forming an "NS" distribution, with the magnetic fields in opposite directions. The remaining suspension coils 12 are arranged in this manner. In this embodiment, after the suspension coils 12 are centrally symmetrically positioned, the direction of the corresponding windings of the suspension coils 12 corresponds to the direction of current flow. In this embodiment, the direction of current flow in a single-phase suspension winding is the same as in the first embodiment described above. A second winding arrangement involves the winding directions of two adjacent suspension coils in the same phase being opposite, and / or the winding directions of two opposing suspension coils being the same. This winding arrangement includes three configurations: a single-phase suspension winding having both adjacent and opposing suspension coils 12; only adjacent suspension coils 12; or only opposing suspension coils 12. The coil lead-in ends of the multiple suspension coils are located on the same radial plane. In order to ensure that the magnetic field directions of two adjacent suspension coils 12 in a single-phase suspension winding are opposite and the magnetic field directions of two opposite suspension coils 12 are the same, when the same enameled wire 14 is wound and the multiple suspension coils 12 have the same winding direction, it is necessary to change the winding direction of the two adjacent suspension coils 12 and / or the winding direction of the two opposite suspension coils to ensure that the winding directions of the two adjacent suspension coils are opposite and / or the winding directions of the two opposite suspension coils are the same.

[0066] It should be noted that in Examples 1-3, the number of turns of each layer of the suspension coil 12 along the axial direction is consistent in the radial plane. Specifically, if a person skilled in the art requires that the suspension coil 12 have 66 turns, when the number of layers of the suspension coil 12 wound along the radial plane is an even number, i.e., 2 layers, the number of turns of the coils corresponding to the first and second layers are both 33, ensuring that the number of turns of each layer of the suspension coil 12 along the axial direction is consistent. When the number of layers of the suspension coil 12 wound along the radial plane is an odd number, i.e., 3 layers, the number of turns of the coils corresponding to the first and second layers are both 22, ensuring that the number of turns of each layer of the suspension coil 12 along the axial direction is consistent. In the present application, the consistent number of turns of each layer of the suspension coil 12 along the axial direction also means that the slot fill rate mentioned above is 100% or close to 100%. The winding method of the coils of Examples 1 to 3 is applicable to both the L-shaped stator core and the linear stator core in the flat pump.

[0067] Specifically, in Example 4, referring to Figures 7 and 8 , the number of layers of the suspension coil 12 on a radial plane must be greater than one, and this number of layers is not limited to an even or odd number. The suspension coil 12 is configured as a stepped coil. Specifically, the coil lead-in and coil lead-out ends of the stepped coil can be arranged on the same radial plane or on different radial planes, depending on whether the number of coil layers corresponding to the outermost step of the stepped coil is an odd or even number. Furthermore, as shown in Figures 7 and 8, the number of coil layers corresponding to the outermost step of the stepped coil is configured as an odd number, and the coil lead-in end and the coil lead-out end of the stepped coil are located on different radial planes. The different radial planes include but are not limited to the coil lead-out end 17 being located at one end of the stator core 11, and the coil lead-out end 18 being located at the other end of the stator core 11, or the coil lead-out end 17 being located at one end of the stator core 11, and the coil lead-out end 18 being located in the middle of the stator core 11. The specific number of winding turns and height are set according to the actual needs of technical personnel in this field and the height of the stator core 11. In this embodiment, the first suspension coil is wound counterclockwise, the second suspension coil is wound clockwise, the third suspension coil is wound counterclockwise, and the fourth suspension coil is wound clockwise. The outermost step of the stepped coil corresponds to an even number of coil layers. As shown in Figure 9 , the coil lead-in and coil lead-out ends of the stepped coil are located on the same radial plane. The first suspension coil is wound counterclockwise, the second suspension coil is wound clockwise, the third suspension coil is wound counterclockwise, and the fourth suspension coil is wound clockwise. Furthermore, the number of coil layers corresponding to each step of the stepped coil can be configured as an odd or even number, and the number of coil turns along the axial direction corresponding to each step is different. In other words, the coil slot fill rate in this embodiment is not 100% as described above. The outer diameter of the suspension coil 12 along the radial plane is distributed in a stepped manner. The stepped suspension coil in Figure 7 illustrates the suspension coil in use. Specifically, if a person skilled in the art requires 66 turns of the suspension coil 12, then in a first embodiment, the first step is configured with an even number of layers, specifically 2 layers, with the first and second layers each having 18 turns. The second step is configured with an even number of layers, specifically 2 layers, with the first and second layers each having 15 turns. Thus, the suspension coil 12 has a total of 4 layers, i.e., the coil lead-out ends of the suspension coil 12 extend from the top of the suspension coil 12, and the coil lead-out ends and the coil lead-in ends are located in the same radial plane. In a second embodiment, the first step is configured with an even number of layers, specifically 2 layers, with the first and second layers each having 18 turns. The second step is configured with an even number of layers, specifically 2 layers, with the first and second layers each having 12 turns. The third step is configured with an odd number of layers, specifically 1 layer, with the corresponding coil turn number 6. Thus, the suspension coil 12 has a total of 5 layers, i.e., the coil lead-out ends of the suspension coil 12 extend from the center of the suspension coil 12.The stepped coils in this embodiment are suitable for flat pumps. The stator in the flat pump includes an annular core and radially spaced stator cores disposed on the inner edge of the annular core. Adjacent stator cores gradually approach each other toward the center of the annular core. Therefore, the radial distance between adjacent stator cores decreases from the side closest to the annular core toward the side closest to the center of the annular core. On the side closest to the center of the annular core, interference may occur between the outer edges of adjacent coils. The stator core 11 in the magnetic levitation pump is linear, and the outer diameter of the levitation coil 12 gradually decreases toward the center of the annular core. Specifically, the levitation coils are positioned as shown in FIG7 . This prevents interference between the levitation coils 12 while further increasing the space factor of the levitation coils 12 and ensuring more stable characteristics of the magnetic levitation motor.

[0068] Furthermore, within the same-phase suspension winding, the number of winding layers and turns of each suspension coil 12 is consistent. Specifically, when a suspension coil 12 has 36 turns in the first layer, 20 turns in the second layer, and 10 turns in the third layer, the number of layers and turns of all other suspension coils 12 in the same phase group are consistent. The coil lead-in ends of the multiple suspension coils are located in the same radial plane, and the winding directions of adjacent suspension coils are opposite. Specifically, each suspension coil 12 is wound from the first end of the stator core 11 to the second end of the stator core 11, then wound 20 turns from the second end toward the first end, and then wound 10 turns from the 20th turn position toward the second end. To ensure that the magnetic fields of two adjacent suspension coils 12 in a single-phase suspension winding are in opposite directions, while the magnetic fields of two opposing suspension coils 12 are in the same direction, the winding directions of the two adjacent suspension coils 12 are alternating, provided that the suspension coils 12 are wound around the same enameled wire 14 and the coil lead ends 17 and coil lead ends 18 are all located in the same radial plane. Specifically, one suspension coil 12 is wound counterclockwise, with current flowing in the coil 12 in a counterclockwise direction, while the adjacent suspension coil 12 is wound clockwise, with current flowing in the coil 12 in a clockwise direction. This ensures that the winding directions of the two adjacent suspension coils 12 are opposite, resulting in the magnetic fields of the adjacent suspension coils 12 exhibiting an "NS" or "SN" distribution, with opposite magnetic field directions. The remaining suspension coils 12 are arranged in the same manner. In this embodiment, the winding direction of the suspension coils 12 corresponds to the direction of current flow. The winding directions of the two adjacent suspension coils 12 are opposite.

[0069] It should be noted that in the above embodiments, the direction indicated by the arrow is the direction of current flow in the suspension coil 12, which in turn is the direction of the winding of the suspension coil 12. In Figure 11 , circles with "x" symbols represent coils with magnetic fields that penetrate the paper, while circles with "○" symbols represent coils with magnetic fields that exit the paper.

[0070] Specifically, in this embodiment, referring to Figures 12(a) and 12(b), the coil can also be configured as a rotating coil 13. The rotating coil 13 is located below the suspension coil 12. One rotating coil 13 is wound around each stator core 11, or one rotating coil 13 is wound around every two adjacent stator cores 11. Specifically, when there are eight stator cores 11, one rotating coil 13 can be wound around each stator core 11, i.e., a total of eight rotating coils 13 are provided; or one large coil is wound around two adjacent stator cores 11, so that four large coils are provided for the eight stator cores 11. When there are six stator cores 11, one rotating coil 13 is wound around each stator core 11, i.e., a total of six rotating coils 13 are provided. Furthermore, multiple rotating coils 13 are configured as a multi-phase rotating winding. In the same phase rotating winding, multiple rotating coils 13 are wound sequentially using a single enameled wire 14. Each phase of the rotating winding is configured with a common lead-in terminal 15 and a common lead-out terminal 16. In the first winding arrangement, the magnetic fields of the two opposing rotating coils 13 are directed in opposite directions, and the lead-in terminals of the two opposing rotating coils are located in the same radial plane. In the second winding arrangement, the winding directions of the two opposing rotating coils in the same phase are the same, and the lead-in terminals of the two opposing rotating coils are located in different radial planes.

[0071] Furthermore, for a magnetic levitation motor with eight stator cores 11, it can be configured with eight levitation coils 12 and eight rotating coils 13, or eight levitation coils 12 and four rotating coils 13. In the first coil structure configuration, the eight levitation coils 12 are configured as a two-phase, two-pole structure, as shown in Figure 10. Then, there are four levitation coils 12 in each phase of the levitation winding. The magnetic fields of adjacent levitation coils 12 are in opposite directions, while the magnetic fields of opposing levitation coils 12 are in the same direction. Therefore, the magnetic field of one phase of the levitation winding has an "NSNS" distribution. The eight rotating coils 13 are configured as a four-phase, one-pole structure. Then, there are two rotating coils 13 in each phase of the rotating winding. The magnetic fields of opposing rotating coils 13 are in opposite directions. Therefore, the magnetic field of one phase of the rotating winding has an "NS" distribution. In the second coil configuration, the eight suspension coils 12 are arranged in a two-phase, two-pole structure. Each phase of the suspension winding has four suspension coils 12. Adjacent suspension coils 12 have opposite magnetic fields, while opposing suspension coils 12 have the same magnetic field. Consequently, the magnetic field of a single phase of the suspension winding exhibits an "NSNS" distribution. The four rotating coils 13 are arranged in a two-phase, one-pole structure, as shown in Figure 12. Each phase of the rotating winding has two rotating coils 13. Each rotating coil 13 is wound around two adjacent stator cores 11. Opposing rotating coils 13 have opposite magnetic fields, resulting in an "NS" or "SN" distribution for the single phase of the rotating winding.

[0072] A magnetic levitation motor with six stator cores 11 can be configured with six levitation coils 12 and six rotating coils 13. The six levitation coils 12 are configured as a three-phase, two-pole structure, as shown in Figure 13 , each including three winding loops or phases. Three-phase current flows through these coils. Within the same phase of the levitation winding, two opposing levitation coils are included, and the magnetic field directions of the two opposing levitation coils are the same. Opposing levitation coils 12 are electrically connected in series in pairs. In each case, these opposing levitation coils 12 are wound around the stator core 11 in opposite diametrical directions and connected in pairs. The series-connected levitation coils 12 form the first winding loop of the levitation winding, and therefore belong to the first phase and carry the phase current. Similarly, the other two winding loops also carry the phase current. In the same-phase suspension winding, the two suspension coils 12 of the opposing suspension windings are always wound in opposite directions. That is, in the same-phase suspension winding, one suspension coil 12 is wound counterclockwise, while the other adjacent suspension coil 12 is wound clockwise. The magnetic fields of the two opposing suspension coils 12 have the same direction. Furthermore, the input terminals of the three-phase suspension windings are electrically connected to the controller, and the output terminals of the three-phase suspension windings are connected to the star point circuit, meaning that the three-phase currents flow together in a common star point. Specifically, in Figure 13, suspension coils 12a and 12d form a single-phase suspension winding, in which the magnetic field has N-N polarity; suspension coils 12e and 12b form a single-phase suspension winding, in which the magnetic field has S-S polarity; and suspension coils 12f and 12c form a single-phase suspension winding, in which the magnetic field has S-S polarity. The six rotating coils 13 are configured in a three-phase, one-pole configuration, as shown in Figure 14. This means each winding loop comprises three winding phases, or phases, through which the three-phase current flows. Within each phase of the rotating winding, two opposing rotating coils are included, and the magnetic fields of the two opposing rotating coils are directed in opposite directions. The opposing rotating coils 13 are electrically connected in pairs in series. In each case, these opposing rotating coils 13 are wound diametrically and identically around the stator core 11 and connected in pairs. The series-connected rotating coils 13 form the first winding loop of the rotating winding, thus belonging to the first phase and carrying the phase current. Similarly, the other two winding loops also carry the phase current. The two rotating coils 13 of the paired rotating windings are always wound in opposite directions. That is, within the same phase of the rotating winding, if one rotating coil 13 is wound counterclockwise, the other opposing rotating coil 13 is also wound counterclockwise, and the magnetic fields of the two opposing rotating coils 13 are directed in opposite directions. Furthermore, the lead-in ends of the three-phase rotating windings are electrically connected to the controller respectively, and the lead-out ends of the three-phase rotating windings are connected to the star point circuit, which means that the three-phase currents flow together in the common star point.Specifically, in Figure 14, the rotating coil 13a and the rotating coil 13d constitute a phase rotating winding, in which the magnetic field is NS pole; the rotating coil 13e and the rotating coil 13b constitute a phase rotating winding, in which the magnetic field is NS pole; the rotating coil 13f and the rotating coil 13c constitute a phase rotating winding, in which the magnetic field is NS pole.

[0073] It should be noted that the coil winding method described in the present application is not limited to the suspension coil 12, but is also applicable to the rotating coil 13; at the same time, the coil winding method described in the present application is not limited to the magnetic levitation motor with 6 stator cores 11 and the magnetic levitation motor with 8 stator cores 11, but is also applicable to the magnetic levitation motor with other numbers of stator cores 11. Preferably, the stator core 11 in the magnetic levitation motor is an L-shaped stator core 11.

[0074] Specifically, in the present application, the suspension coil 12 and / or the rotating coil 13 are configured as round wire or flat wire. For the suspension coil 12 and the rotating coil 13 wound with round wire, the round wire can be wound into a multi-turn structure, making it easier to arrange the connection relationship between the coils according to the various embodiments of the present application, namely the winding connection methods corresponding to Examples 1-4. As for flat wires, due to their large wire diameter, it is very difficult to wind them into a multi-turn structure, so they are often wound into single-turn coils. The single-turn coil corresponds to the odd-layer structure of the present application. In order to ensure that the magnetic field directions of two adjacent suspension coils 12 in a single-phase suspension winding are opposite and the magnetic field directions of the two relative suspension coils 12 are the same, when the same enameled wire 14 is wound and the winding directions of multiple suspension coils 12 are the same, it is necessary to change the placement orientation of the two adjacent suspension coils 12, that is, the two adjacent suspension coils 12 are configured to be axially symmetrical, and the lead-in ends of the two adjacent suspension coils 12 are respectively located on two different axial sides, so that the current in one suspension coil 12 flows in the counterclockwise direction, and the current in the adjacent suspension coil 12 flows in the clockwise direction, so that the magnetic fields of the adjacent suspension coils 12 have an "NS" distribution, with opposite magnetic field directions. The remaining suspension coils 12 are arranged in this manner.

[0075] Specifically, referring to FIG11 , in this embodiment, the magnetic levitation motor further includes a power amplifier circuit 30 , which is electrically connected to the control device. Of course, this component can also be a control device or other device with a power amplifier, such as a multi-phase current controller with a bridge branch, an H-bridge switching amplifier, other switching amplifiers, or analog amplifiers. Taking the power amplifier circuit 30 as an example, the common lead-in terminal 15 and the common lead-out terminal 16 of each phase of the suspension winding and each phase of the rotating winding are electrically connected to the power amplifier circuit 30 . The power amplifier circuit 30 supplies a suspension current for suspension control to the suspension coil 12 , and supplies a rotating current for rotation control to the rotating coil 13 . The suspension current of the suspension coil 12 is configured to generate a Ps-pole suspension magnetic field, and the rotating current of the rotating coil 13 is configured to generate a Pt-pole rotating magnetic field. Ps is the number of pole pairs of the suspension magnetic field, and Pt is the number of pole pairs of the rotating magnetic field, and the conditions Ps = Pt + 1 or Ps = Pt - 1 are satisfied. The suspension magnetic field and the rotating magnetic field are superimposed on each other to generate a radial suspension force that controls the levitation of the rotor 20 .

[0076] The present application also discloses a magnetic levitation device, including the above-mentioned magnetic levitation motor. As shown in Figure 15, the magnetic levitation device can be configured as a magnetic levitation pump, a magnetic levitation turntable, or a magnetic levitation stirrer. The rotor 20 in the magnetic levitation motor can be an integral rotor 20. For example, in the application of a magnetic levitation pump, the rotor 20 is both the rotor 20 of the magnetic levitation motor and the rotor 20 of the magnetic levitation pump. It can be, for example, a permanent magnet rotor 20, a short-circuit cage rotor 20, or a reluctance rotor 20. The stator 10 is designed as a bearing and a driving stator 10, including a stator core 11 and a suspension coil 12 and a rotating coil 13 wound around the stator core 11. The stator 10 is both a rotationally driven stator 10 and a magnetically levitation stator 10. The stator core 11 can be a plurality of straight-line stator 10 teeth, which can be understood as a magnetic levitation motor with straight-line stator 10 teeth, but is not limited to this. In other embodiments, the stator core 11 can also be configured as L-shaped stator 10 teeth, which can be understood as a magnetic levitation motor with L-shaped stator 10 teeth. On the one hand, the stator 10 applies torque to the rotor 20 to achieve its rotation around the desired axis of rotation, and on the other hand, it applies a shear force, which is applied to the rotor 20 so that its radial position can be actively controlled or adjusted. Therefore, the stator 10 can actively adjust the three degrees of freedom of the rotor 20, namely its rotation and its radial position (two degrees of freedom). For the other three degrees of freedom, namely its position in the axial direction and its tilt relative to the radial plane perpendicular to the desired axis of rotation (two degrees of freedom), the rotor 20 is passively magnetically suspended or stabilized by magnetic resistance.

[0077] The present application also discloses a method for winding an integrated winding magnetic levitation motor, comprising the following steps:

[0078] First, in the same phase winding, winding starts from the first coil of the winding, and the coil lead-out terminal 17 of the first coil is configured as the common lead-in terminal of the phase winding.

[0079] Next, reserve a certain length of the coil lead-out end 18 of the first coil as a connecting wire, and then use the connecting wire as the coil lead-out end 17 of the second coil to start winding. At this point, the second coil is connected in series with the first coil, and there is no need to disconnect or weld.

[0080] Then, the remaining coils in the same phase winding are wound in the same manner, with the magnetic fields of adjacent coils facing in opposite directions and opposite coils facing in the same direction. The angle between adjacent coils (i.e., in a radial plane) is less than 180°, and the angle between opposite coils (i.e., in a radial plane) is 180°. The coil lead 18 of the last coil is configured as the common lead for that phase winding.

[0081] Finally, the other windings of the magnetic levitation motor are wound using the same winding method as above.

[0082] Furthermore, in the same phase winding, there are multiple methods for winding multiple coils. Specifically, taking a one-phase, two-pole suspension winding as an example, a one-phase suspension winding includes four suspension coils 12. The first winding method: As shown in FIG4 , the coil lead-out end 17 and the coil lead-out end 18 of each suspension coil 12 are arranged on the same radial plane. The coil lead-out ends 17 and the coil lead-out ends 18 of multiple suspension coils 12 are all arranged on the same radial plane. The first suspension coil 12 is wound in a counterclockwise direction, the second suspension coil 12 is wound in a clockwise direction, the third suspension coil 12 is wound in a counterclockwise direction, and the fourth suspension coil 12 is wound in a clockwise direction, thus ensuring that the magnetic field directions of adjacent coils are opposite.

[0083] Second winding method: As shown in Figure 5, the coil lead-out end 17 and coil lead-out end 18 of each suspension coil 12 are arranged on the same radial plane. All four suspension coils 12 are wound counterclockwise. The first suspension coil 12 is placed in the forward direction, the second suspension coil 12 is placed in the reverse direction, the third suspension coil 12 is placed in the forward direction, and the fourth suspension coil 12 is placed in the reverse direction. The coil lead-out end 18 of the first suspension coil 12 extends to the coil lead-out end 17 of the second suspension coil 12, the coil lead-out end 18 of the second suspension coil 12 extends to the coil lead-out end 17 of the third suspension coil 12, and the coil lead-out end 18 of the third suspension coil 12 extends to the coil lead-out end 17 of the fourth suspension coil 12. This ensures that the magnetic fields of adjacent coils are in opposite directions.

[0084] Third Winding Method: As shown in Figure 6 , the coil lead-out end 17 and coil lead-out end 18 of each suspension coil 12 are arranged on two opposing radial planes. All four suspension coils 12 are wound counterclockwise, with the first suspension coil 12 placed in the forward direction, the second suspension coil 12 placed in the reverse direction, the third suspension coil 12 placed in the forward direction, and the fourth suspension coil 12 placed in the reverse direction. The coil lead-out end 18 of the first suspension coil 12 extends to the coil lead-out end 17 of the second suspension coil 12, the coil lead-out end 18 of the second suspension coil 12 extends to the coil lead-out end 17 of the third suspension coil 12, and the coil lead-out end 18 of the third suspension coil 12 extends to the coil lead-out end 17 of the fourth suspension coil 12. This ensures that the magnetic fields of adjacent coils are in opposite directions.

[0085] Fourth winding method: As shown in FIG7 , the four suspension coils 12 are all configured as stepped suspension coils 12 , and the four suspension coils 12 are all placed in the forward direction. The first suspension coil 12 is wound in a counterclockwise direction, the second suspension coil 12 is wound in a clockwise direction, the third suspension coil 12 is wound in a counterclockwise direction, and the fourth suspension coil 12 is wound in a clockwise direction, so as to ensure that the magnetic fields of adjacent coils are in opposite directions.

[0086] Of course, in this application, the rotating winding is also suitable for the above coil winding method. It is only necessary to ensure that the magnetic field directions of the relative rotating coils 12 in the rotating winding are opposite. Those skilled in the art can choose a suitable winding method according to actual needs.

[0087] Specific embodiments are used in the present invention to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. An integrated winding magnetic levitation motor, the magnetic levitation motor comprising a stator and a rotor, the stator comprising 2N+2 stator cores distributed in a circumference, N being a non-zero natural number, each stator core (11) being correspondingly wound with a coil, each of the coils having a coil lead-in end (120) and a coil lead-out end (121), characterized in that: A plurality of coils spaced at a certain angle on the circumference of the stator core are connected in series to form at least one phase winding. In the same phase winding, the coil lead-out end of one coil is connected to the coil lead-in end of an adjacent coil, and the plurality of coils are successively wound in sequence through the same enameled wire (14) to form an integrated winding. The winding of each phase is configured to have a common lead-in end (15) and a common lead-out end (16). The at least one phase winding is configured as a suspension winding and / or a rotating winding. In a power-on state, the magnetic field directions of the two opposite coils in the suspension winding of each phase are the same, and the magnetic field directions of the two opposite coils in the rotating winding of each phase are opposite.

2. The integrated winding magnetic levitation motor according to claim 1, characterized in that: The suspension winding comprises a plurality of suspension coils (12), each stator core corresponds to one suspension coil, the suspension coil is wound along the axial direction of the stator core, and in the suspension winding of the same phase, the magnetic field directions of two adjacent suspension coils are opposite and / or the magnetic field directions of two opposite suspension coils are the same.

3. The integrated winding magnetic levitation motor according to claim 2, characterized in that: The number of layers of the suspension coil wound on the radial plane is configured to be an even number, and the coil lead-in end and the coil lead-out end of each suspension coil are located on the same radial plane.

4. The integrated winding magnetic levitation motor according to claim 3, characterized in that: In the suspension winding of the same phase, the coil lead-in ends of the plurality of suspension coils are located on the same radial plane, and the winding directions of two adjacent suspension coils are opposite and / or the winding directions of two opposite suspension coils are the same.

5. The integrated winding magnetic levitation motor according to claim 3, characterized in that: In the suspension winding of the same phase, the winding directions of the plurality of suspension coils are the same, the coil lead-in ends of two adjacent suspension coils are located on different radial planes and / or the coil lead-in ends of two opposite suspension coils are located on the same radial plane.

6. The integrated winding magnetic levitation motor according to claim 2, characterized in that: The number of layers of the suspension coil wound on a radial plane is configured to be an odd number, and the coil lead-in end and the coil lead-out end of each suspension coil are located on different radial planes.

7. The integrated winding magnetic levitation motor according to claim 6, characterized in that: In the suspension winding of the same phase, the winding directions of the plurality of suspension coils are the same, the coil lead-out end of one suspension coil and the coil lead-in end of an adjacent suspension coil are located on the same radial plane, and / or the coil lead-in end of one suspension coil and the coil lead-in end of an opposite suspension coil are located on the same radial plane.

8. The integrated winding magnetic levitation motor according to claim 6, characterized in that: In the suspension winding of the same phase, the winding directions of two adjacent suspension coils are opposite and / or the winding directions of two opposite suspension coils are the same, and the coil lead-in ends of the plurality of suspension coils are located on the same radial plane.

9. The integrated winding magnetic levitation motor according to any one of claims 2 to 8, characterized in that: On a radial plane, the number of turns of each layer of the suspension coil along the axial direction is consistent.

10. The integrated winding magnetic levitation motor according to claim 2, characterized in that: The suspension coil is configured as a step-type coil, the number of coil layers corresponding to the outermost step of the step-type coil is configured as an odd number, and the coil lead-in end and the coil lead-out end of the step-type coil are located on different radial planes; or, The number of coil layers corresponding to the outermost step of the step-type coil is configured as an even number, and the coil lead-in end and the coil lead-out end of the step-type coil are located on the same radial plane.

11. The integrated winding magnetic levitation motor according to claim 10, characterized in that: In the suspension winding of the same phase, the number of winding layers and the number of winding turns of each suspension coil are consistent, the coil lead-in ends of the multiple suspension coils are located on the same radial plane, and the winding directions of two adjacent suspension coils are opposite and / or the winding directions of two opposite suspension coils are the same.

12. The integrated winding magnetic levitation motor according to claim 1, characterized in that: The rotating winding includes a plurality of rotating coils, and the rotating winding is located below the suspension winding. One rotating coil is correspondingly wound on each stator core, or one rotating coil is correspondingly wound on every two adjacent stator cores.

13. The integrated winding magnetic levitation motor according to claim 12, characterized in that: In the rotating winding of the same phase, the winding directions of the two opposite rotating coils are opposite, and the coil lead-in ends of the two opposite rotating coils are located on the same radial plane; or, In the rotating winding of the same phase, the winding directions of the two opposite rotating coils are the same, and the coil lead-in ends of the two opposite rotating coils are located on different radial planes.

14. The integrated winding magnetic levitation motor according to claim 1, characterized in that: The coil is configured as a round wire or a flat wire.

15. The integrated winding magnetic levitation motor according to any one of claims 1-8 and 10-14, characterized in that: The magnetic levitation motor also includes a power amplifier circuit, and the common lead-in end and the common lead-out end of each phase of the levitation winding and each phase of the rotating winding are respectively electrically connected to the power amplifier circuit. The power amplifier circuit configures a levitation current for levitation control to the levitation coil, and configures a rotating current for rotation control to the rotating coil.

16. A magnetic levitation device, characterized in that: The invention comprises an integrated winding magnetic levitation motor as described in any one of claims 1 to 15.

17. A method for winding an integrated winding of a magnetic levitation motor, characterized in that: The following steps are involved: In the same phase winding, winding starts from the first coil of the winding, and the coil lead-in end of the first coil is configured as a common lead-in end; A certain length of the lead-out end of the first coil is reserved as a connecting wire and used as the lead-in end of the second coil to start winding, and the second coil is connected in series with the first coil; At least one phase winding is configured as a suspension winding and / or a rotating winding. In the suspension winding, the magnetic field directions of two adjacent coils are opposite and / or the magnetic field directions of two opposite coils are the same, and so on. In the rotating winding, the magnetic field directions of two opposite coils are opposite, and so on. The remaining coils in the same phase winding are wound, and the coil lead end of the last coil is configured as a common lead end. Complete the winding of other phase windings using the same winding method.

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