Stator winding connection structure and magnetic levitation pump based on integrated magnetic levitation motor

Abstract

The present invention discloses a stator winding connection structure and a magnetic levitation pump based on an integrated magnetic levitation motor. The magnetic levitation motor includes a housing, a base, and a stator assembly and a control unit arranged in the housing. The control unit includes a control circuit board. The control circuit board and the stator winding have a first distance in the axial direction. A plurality of metal connectors are also arranged in the housing, which are arranged within the first distance. Each metal connector is connected to a corresponding stator winding. The side of the metal connector adjacent to the stator winding is configured to be electrically connected to the lead-out end of the stator winding, and the side adjacent to the control circuit board is configured to be electrically connected to the control circuit board; wherein the hardness of the metal connector is greater than the hardness of the stator winding. By replacing the electrical connection between the stator winding and the control circuit board with a metal connector, the problem of the stator winding being soft and easy to be damaged is avoided, and its service life is increased; and when replacing, the metal connector only needs to be disconnected from the control circuit board, which is convenient for later maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic levitation motors, and in particular to a stator winding connection structure and a magnetic levitation pump based on an integrated magnetic levitation motor. Background Art

[0002] A magnetic levitation motor is a magnetic levitation rotary drive that uses magnetic field force to suspend the rotor so that there is no mechanical contact between the rotor and the stator. The magnetic levitation motor can be a magnetic bearing motor, a bearingless motor, or a bearingless thin-film motor, etc.

[0003] A magnetic bearing motor, also known as a magnetic bearing, is a motor that combines a rotary drive motor with an axial magnetic bearing or / and a radial magnetic bearing or / and an axial-diameter hybrid magnetic bearing instead of integrating them together.

[0004] A bearingless motor is a motor that integrates motor rotation and suspension functions. A bearingless motor has an additional set of windings on top of the windings that generate a rotating drive magnetic field to generate an excitation magnetic field. The interaction between the two magnetic fields breaks the balanced distribution of the original drive magnetic field, thereby generating a radial force acting on the rotor. The rotor is suspended by controlling the radial force in the motor. Compared with a magnetic bearing motor, the magnetic suspension winding of a bearingless motor is wound on the stator and does not occupy additional radial space, which to a certain extent overcomes the shortcomings of large size and high cost of magnetic bearings. In order to achieve suspension of the motor rotor in five degrees of freedom, early bearingless motors generally required two bearingless motors and one axial magnetic bearing.

[0005] The magnetic levitation control system is also called the suspension control system, which includes sensors, controllers, electromagnets and other parts. The magnetic levitation motor is integrated with various sensors and sensor circuits, and a signal conditioning module that adjusts and processes the sensor signal containing control data output by the sensor. The sensor, sensor circuit and signal conditioning module constitute a sensor module, and the control data of the magnetic levitation motor can be detected in real time through the sensor module. With the control data as feedback, the magnetic levitation motor controller generates a control signal for the power amplifier as the execution part according to the control strategy. The power amplifier outputs current to excite the electromagnetic coil of the stator part of the magnetic levitation motor to achieve the suspension and / or rotation control of the rotor. The controller adjusts the armature current according to the sensor signal to adjust the magnetic field, thereby controlling the suspension height and speed of the rotor.

[0006] As the core part of the entire suspension control system, the controller is currently often placed separately from the magnetic suspension motor. The controller is located outside the magnetic suspension motor. The magnetic suspension motor and the controller are two independent components. The signal of the magnetic suspension motor is transmitted to the controller for processing by connecting the signal line between the two. The split magnetic suspension motor has the problem of being inconvenient to carry and transport and having a large space occupancy rate. In order to solve this problem, the Chinese patent with patent number CN112807563A proposes a magnetic suspension pump. The stator 74' of the patent includes a stator yoke 741', a plurality of stator teeth 743' and a plurality of stator coils 745'. The plurality of stator teeth 743' are fixed on the stator yoke 741', and the plurality of stator coils 745' are respectively installed on the plurality of stator teeth 743'. The plurality of stator coils 745' are all electrically connected to the control circuit board 62', and the control circuit board 62' is fixedly connected to the stator yoke 741'. However, in the patent, the stator coil 745' is directly welded and fixed to the control circuit board 62'. For a magnetic levitation motor with a relatively low power, the stator coil is relatively soft and has a relatively small diameter, which is generally 0.5-0.7 mm. The stator coil is directly fixed to the control circuit board by welding. This fixing method has the following problems: 1. Before assembling the magnetic levitation motor, the control circuit board needs to be debugged, that is, the lead-out end of the stator coil needs to be fixed to the control circuit board, and then the performance of each electronic component on the control circuit board needs to be debugged and verified. In this process, there is a problem that the performance of the electronic components is not good and needs to be replaced. Since the stator coil and the control circuit board have been welded and fixed, the tin needs to be removed to separate the two, and then the electronic components need to be removed and replaced. The replacement is relatively troublesome, and the stator coil needs to be welded and removed multiple times, which easily leads to the fracture and damage of the stator coil. 2. After the magnetic levitation motor is assembled, the control circuit board will be damaged after long-term use. When there is a need for replacement, this stator coil fixing method is more troublesome to maintain. It is necessary to first remove the tin from the control circuit board and the stator coil that are welded together, then replace the control circuit board, and then weld the stator coil to the control circuit board. There is also a risk of stator coil breakage and damage during the separation process. The operation process is cumbersome, inconvenient for maintenance and assembly, and the maintenance cost is high. Summary of the invention

[0007] In order to overcome the defects in the prior art, an embodiment of the present invention provides a stator winding connection structure and a magnetic levitation pump based on an integrated magnetic levitation motor, which are used to solve at least one of the above problems.

[0008] The embodiment of the present application discloses a stator winding connection structure and a magnetic levitation pump based on an integrated magnetic levitation motor, in which the electrical connection between the lead-out end of the stator winding and the control circuit board is achieved through a metal connector. When it is necessary to replace electronic components on the control circuit board or replace the control circuit board, it is only necessary to remove the metal connector connected to the lead-out end of the stator winding, thereby achieving the purpose of quickly replacing the electronic components or the control circuit board, facilitating operation, and avoiding the problem that the lead-out end of the stator winding is easily damaged after multiple removals due to the stator winding being relatively soft, thereby greatly improving the service life of the stator winding and reducing production costs. When replacing, it is only necessary to disconnect the metal connector from the control circuit board without touching the stator winding, thereby facilitating later maintenance and greatly improving maintenance efficiency, thereby reducing production costs and labor costs.

[0009] Among them, a stator winding connection structure based on an integrated magnetic levitation motor is provided, the magnetic levitation motor comprises a shell, a base, and a stator assembly and a control unit arranged in the shell, the base is fixedly connected to one end of the shell, the stator assembly comprises a plurality of iron cores and a plurality of stator windings, at least one stator winding is wound on each of the iron cores, the stator winding is electrically connected to the control unit, the control unit comprises a control circuit board, the control circuit board has a first distance from the stator winding in the axial direction, and is located below the stator winding, a metal connector is also provided in the shell, the metal connector is arranged within the first distance, a side of the metal connector adjacent to the stator winding is arranged to be electrically connected to the lead-out end of the stator winding, and a side adjacent to the control circuit board is arranged to be electrically connected to the control circuit board; wherein the hardness of the metal connector is greater than the hardness of the stator winding.

[0010] Furthermore, a partition plate is provided in the shell, and the partition plate is fixedly connected to the inner wall of the shell. The inner cavity formed by the shell and the base is divided into a first cavity and a second cavity by the partition plate. The first cavity is partially connected to the second cavity. The partition plate and an end portion of the shell facing away from the base form the first cavity, and the partition plate and the base form the second cavity.

[0011] Furthermore, the partition plate is provided with a plurality of through holes, the through holes connecting the first cavity and the second cavity, the metal connectors are passed through the through holes and are arranged in the first cavity and the second cavity, and at least one metal connector is correspondingly arranged in each of the through holes.

[0012] Furthermore, the stator assembly is disposed in the first cavity, the control unit is disposed in the second cavity, the portion of the metal connector located in the first cavity is configured to be electrically connected to the lead-out end of the stator winding, and the portion of the metal connector located in the second cavity is configured to be electrically connected to the control circuit board.

[0013] Furthermore, the metal connector is configured as a metal needle, one end of the metal needle is fixedly connected to the lead-out end of the stator winding by welding, and the other end of the metal needle passes through the through hole into the second cavity.

[0014] Furthermore, the control circuit board is provided with a plurality of connection holes, and a metal needle is correspondingly inserted into each of the connection holes. The other end of the metal needle passes through the connection hole from a side of the control circuit board adjacent to the stator winding, and comes out from a side of the control circuit board away from the stator winding, and is fixedly connected to the stator winding by welding.

[0015] Furthermore, the metal connector is configured as a metal needle and a crown spring, one end of the metal needle is fixedly connected to the lead-out end of the stator winding by welding, the other end of the metal needle passes through the through hole into the second cavity, the crown spring is arranged in the second cavity, and passes into the control circuit board from a side of the control circuit board adjacent to the stator winding and is electrically connected to it, and the other end of the metal needle is electrically connected to the crown spring.

[0016] Furthermore, each of the metal needles is connected to a crown spring, and a hole is provided on one side of the crown spring adjacent to the metal needle. The other end of the metal needle is correspondingly inserted into the crown spring from the hole and abuts against the inner wall of the crown spring.

[0017] Furthermore, the metal connector is configured as a spring pin and a solder pad, one end of the spring pin is fixedly connected to the lead-out end of the stator winding by welding, and the other end of the spring pin passes through the through hole into the second cavity and is electrically connected to the solder pad.

[0018] Furthermore, the pad is fixedly connected to the side of the control circuit board adjacent to the stator winding by welding, and is electrically connected to the control circuit board, each spring pin corresponds to one pad, and the other end of the spring pin abuts against the surface of the pad.

[0019] Furthermore, the metal connecting part is configured as a metal needle and an adapter plate, the adapter plate is arranged in the first cavity and fixedly connected to the shell, the adapter plate is sleeved on the lower part of the iron core, and there is a certain distance between the bottom of the adapter plate and the top of the partition plate. The lead end of the stator winding is fixedly connected to the upper part of the adapter plate by welding, and the two are electrically connected, and the stator winding and the metal needle are electrically connected through the adapter plate.

[0020] Furthermore, each stator winding corresponds to at least one of the metal needles, one end of the metal needle is fixedly connected to the lower part of the adapter plate by welding, and the other end of the metal needle passes through the through hole into the second cavity and is electrically connected to the control circuit board.

[0021] Furthermore, a potting material is potted in the first cavity, and the position of the metal connector in the first cavity relative to the shell is fixed by the potting material.

[0022] Furthermore, the magnetic levitation motor also includes a sensor assembly arranged in the first cavity, the sensor assembly includes a plurality of sensors, the lead wires of the plurality of sensors are led out through a flexible flat cable, the tail of the flexible flat cable is connected to a connecting terminal, the flexible flat cable is passed through the through hole into the second cavity, and is electrically connected to the control circuit board.

[0023] Furthermore, a sensor socket is provided on a side of the control circuit board adjacent to the stator winding, and the connection terminal is electrically connected to the sensor socket.

[0024] Furthermore, a sensor socket is provided on a side of the control circuit board away from the stator winding, and a notch is provided on an outer edge of the control circuit board. The notch is configured as a routing opening for the flexible flat cable. The flexible flat cable passes through the notch to the side where the sensor socket is located, and the connecting terminal is electrically connected to the sensor socket; wherein the width of the notch along the circumferential direction is greater than the width of the flexible flat cable.

[0025] Furthermore, a plurality of bosses are provided along the outer circumference on one side of the partition plate adjacent to the base, and the plurality of bosses are configured to support and fix the control circuit board. At least one screw hole is provided on the boss along the axial direction, and a plurality of connecting holes are provided on the control circuit board along the outer circumference. The control circuit board cover is provided on the side of the boss away from the partition plate, and the control circuit board and the boss are fixedly connected by screws that penetrate the connecting holes and the screw holes in sequence.

[0026] Furthermore, a cylinder extending axially is provided at the center of the partition plate, and the cylinder is inserted into the space formed by the multiple iron cores. The space formed by the multiple bosses and the cylinder is configured as a accommodating cavity. Multiple electronic components are arranged on the control circuit board, and the accommodating cavity is configured to accommodate the multiple electronic components.

[0027] The present application also discloses a magnetic levitation pump, including a pump head, a rotor impeller and the above-mentioned stator winding connection structure based on the integrated magnetic levitation motor, wherein the pump head cover is arranged on the top of the magnetic levitation motor and is fixedly connected to the top of the shell, the rotor impeller part is located in the pump head and cooperates with the stator assembly, and the stator assembly is configured to generate a magnetic field to drive the rotor impeller to rotate and levitate.

[0028] The beneficial effects of the present invention are as follows:

[0029] The electrical connection between the lead-out end of the stator winding and the control circuit board is achieved through the metal connector. When the electronic components on the control circuit board need to be replaced or the control circuit board needs to be replaced, it is only necessary to remove the metal connector connected to the lead-out end of the stator winding, thereby achieving the purpose of quickly replacing the electronic components or the control circuit board, which is convenient for operation and avoids the problem that the lead-out end of the stator winding is easily damaged after multiple removals due to the stator winding being relatively soft, thereby greatly improving the service life of the stator winding and reducing production costs. Moreover, when replacing, it is only necessary to disconnect the metal connector from the control circuit board without touching the stator winding, which is convenient for later maintenance and greatly improves maintenance efficiency, thereby reducing production costs and labor costs.

[0030] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0032] Figure 1 It is a cross-sectional schematic diagram of a prior art magnetic suspension pump cited in the background technology;

[0033] Figure 2 is a schematic structural diagram of an integrated magnetic levitation motor in an embodiment of the present invention;

[0034] Figure 3 is a front view of an integrated magnetic levitation motor according to an embodiment of the present invention;

[0035] Figure 4 It is an embodiment of the stator winding connection structure based on the integrated magnetic levitation motor in the embodiment of the present invention;

[0036] Figure 5 It is another embodiment of the stator winding connection structure based on the integrated magnetic levitation motor in the embodiment of the present invention;

[0037] Figure 6 It is another embodiment of the stator winding connection structure based on the integrated magnetic levitation motor in the embodiment of the present invention;

[0038] Figure 7 This is another embodiment of the stator winding connection structure based on the integrated magnetic levitation motor in the embodiment of the present invention;

[0039] Figure 8 It is a schematic diagram of the structure of the shell, the partition plate and the boss in one body in an embodiment of the present invention;

[0040] Fig. 9 It is a bottom view of the shell, the partition plate and the boss in one body in the embodiment of the present invention;

[0041] Fig.10 It is a cross-sectional schematic diagram of a housing, a partition plate, and a boss integrated into one in an embodiment of the present invention;

[0042] Fig.11 It is an embodiment of the control circuit board in the embodiment of the present invention;

[0043] Fig.12 It is another embodiment of the control circuit board in the embodiment of the present invention;

[0044] Fig.13 is a cross-sectional schematic diagram of a sensor arrangement based on a stator winding connection structure of an integrated magnetic levitation motor in an embodiment of the present invention;

[0045] Fig.14 is a schematic structural diagram of a magnetic suspension pump in an embodiment of the present invention;

[0046] Fig.15 Schematic cross-sectional view of the magnetic levitation pump in an embodiment of the present invention.

[0047] The figure numbers of the above drawings are: 1, magnetic levitation motor; 10, housing; 100, first cavity; 101, second cavity; 11, base; 12, stator assembly; 120, iron core; 121, stator winding; 1210, lead end; 13, metal connector; 130, metal needle; 131, crown spring; 132, spring needle; 133, pad; 134, adapter plate; 14, partition plate; 140, through hole; 141, cylinder; 1410, opening; 15, sensor; 150, lead wire; 151, flexible flat cable; 16, boss; 160, screw hole;

[0048] 2. control unit; 20. control circuit board; 200. notch; 21. capacitor; 22. sensor connector;

[0049] 3. Magnetic levitation pump; 30. Pump head; 31. Rotor impeller. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0051] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on 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 clearly listed, but may include other units that are not clearly listed or inherent to these products or devices.

[0052] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined 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 clearly specified.

[0053] The drawings in this disclosure are not drawn strictly according to the actual 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.

[0054] In the prior art, the stator coil is directly welded and fixed to the control circuit board. For a magnetic levitation motor with a relatively low power, the stator coil is relatively soft and has a relatively small diameter, generally 0.5-0.7 mm. The stator coil is directly fixed to the control circuit board by welding. This fixing method has the following problems: 1. Before assembling the magnetic levitation motor, the control circuit board needs to be debugged, that is, the lead-out end of the stator coil needs to be fixed to the control circuit board, and then the performance of each electronic component on the control circuit board needs to be debugged and verified. In this process, there is a problem that the performance of the electronic components is not good and needs to be replaced. Since the stator coil and the control circuit board have been welded and fixed, the tin needs to be removed to separate the two, and then the electronic components need to be removed and replaced. The replacement is relatively troublesome, and the stator coil needs to be welded and removed multiple times, which easily leads to the fracture and damage of the stator coil. 2. After the magnetic levitation motor is assembled, the control circuit board will be damaged after long-term use. When there is a need for replacement, this stator coil fixing method is more troublesome to maintain. It is necessary to first remove the tin from the control circuit board and the stator coil that are welded together, then replace the control circuit board, and then weld the stator coil to the control circuit board. There is also a risk of stator coil breakage and damage during the separation process. The operation process is cumbersome, inconvenient for maintenance and assembly, and the maintenance cost is high.

[0055] The present application realizes the electrical connection between the stator winding and the control circuit board through a metal connector. When it is necessary to replace the electronic components on the control circuit board or replace the control circuit board, it is only necessary to remove the metal connector connected to the lead-out end of the stator winding, thereby achieving the purpose of quickly replacing the electronic components or the control circuit board, facilitating the operation, and avoiding the problem that the lead-out end of the stator winding is easily damaged after multiple removals due to its softness. During replacement, it is only necessary to disconnect the metal connector from the control circuit board without touching the stator winding, which is convenient for later maintenance and greatly improves the maintenance efficiency, reducing production costs and labor costs.

[0056] In order to enable those skilled in the art to better understand the present invention, Figure 2-Figure 15 The present invention is further described in detail with specific implementation modes.

[0057] According to an embodiment of the present invention, the present invention proposes a stator winding 1 connection structure based on an integrated magnetic levitation motor, wherein the magnetic levitation motor 1 includes a housing 10, a base 11, a stator assembly 12 and a control unit 2 arranged in the housing 10, wherein the base 11 is fixedly connected to one end of the housing 10, and the stator assembly 12 includes a plurality of iron cores 120 and a plurality of stator windings 121, wherein at least one stator winding 121 is wound on each of the iron cores 120, and the stator winding 121 is electrically connected to the control unit 2, and the control unit 2 includes a control circuit board 2. 0, the control circuit board 20 has a first distance from the stator winding 121 in the axial direction and is located below the stator winding 121. A metal connector 13 is further provided in the housing 10. The metal connector 13 is arranged within the first distance. The side of the metal connector 13 adjacent to the stator winding 121 is configured to be electrically connected to the lead-out end 1210 of the stator winding 121, and the side adjacent to the control circuit board 20 is configured to be electrically connected to the control circuit board 20; wherein the hardness of the metal connector 13 is greater than the hardness of the stator winding 121.

[0058] Specifically, in this embodiment, see Figure 2-Figure 4The magnetic levitation motor 1 includes a housing 10, a base 11, a stator assembly 12 and a control unit 2 arranged in the housing 10. The base 11 is fixedly connected to one end of the housing 10, and the base 11 is located below the housing 10. The stator assembly 12 includes a plurality of iron cores 120 and a plurality of stator windings 121. The plurality of stator iron cores 120 are arranged in a circumferential shape in the housing 10. At least one stator winding 121 is wound on each iron core 120. The stator winding 121 is electrically connected to the control unit 2, and the control unit 2 adjusts the armature current passing through the stator winding 121 according to the signal of the sensor 15 to adjust the magnetic field, thereby controlling the suspension and / or rotation control of the rotor. The control unit 2 includes a control circuit board 20, and the control circuit board 20 has a first distance from the stator winding 121 in the axial direction. Specifically, the control circuit board 20 and the stator winding 121 are placed separately in the housing 10. Further, the control circuit board 20 is located below the stator winding 121. A metal connector 13 is further provided in the housing 10, and the metal connector 13 is arranged within the first distance. Each metal connector 13 is connected to a corresponding stator winding 121. For example, for a magnetic levitation motor 1 including six stator windings 121, each stator winding 121 corresponds to a metal connector 13, that is, six metal connectors 13 are arranged in the housing 10. The side of the metal connector 13 adjacent to the stator winding 121 is configured to be electrically connected to the lead-out end 1210 of the stator winding 121, and the side adjacent to the control circuit board 20 is configured to be electrically connected to the control circuit board 20. Among them, the hardness of the metal connector 13 is greater than the hardness of the stator winding 121. The metal connector 13 is used to electrically connect the lead-out terminal 1210 of the stator winding 121 and the control circuit board 20. Even if the metal connector 13 needs to be de-tinned, separated and then welded multiple times during later maintenance, the metal connector 13 is not easily damaged. This avoids the problem of easy breakage caused by multiple disassembly due to the lead-out terminal 1210 of the stator winding 121 being directly welded to the control circuit board 20 due to the softness of the stator winding 121.

[0059] It should be noted that the present invention does not limit the structure of the stator winding 121 of the magnetic levitation motor 1, which can be a single winding structure or a double winding structure, that is, at least one stator winding 121 is provided on each iron core 120. In one embodiment, a stator winding 121 is provided on each iron core 120, and the stator winding 121 is a concentrated winding. The stator winding 121 is used for both rotation control and suspension control to form a single winding structure of the magnetic levitation motor 1. In another embodiment, two stator windings 121 are provided on each iron core 120, and the two stator windings 121 can both be concentrated windings, or one stator winding 121 can be a concentrated winding and the other stator winding 121 can be a distributed winding. The two stator windings 121 on the iron core 120 are stacked together, one stator winding 121 is used for rotation control, and the other stator winding 121 is used for suspension control to form a double winding structure of the magnetic levitation motor 1. Since the single-winding magnetic levitation motor 1 can realize the rotation and suspension of the motor rotor at the same time with only one set of stator windings 121, it has better performance advantages than the double-winding magnetic levitation motor 1. Those skilled in the art can select the stator winding 121 structure in the magnetic levitation motor 1 as a single winding structure or a double winding structure according to actual needs to meet the actual working performance of the magnetic levitation motor 1. The following embodiments and figures in this application are all based on the structure of a single winding, and one stator winding 121 is a centralized winding, which is used for both rotation control and suspension control.

[0060] In the present application, the inner cavity formed by the shell 10 and the base 11 can have two different embodiments. The first embodiment: the inner cavity formed by the shell 10 and the base 11 is configured as one cavity, and the stator assembly 12 and the control circuit board 20 are both placed in one cavity. The second embodiment: the inner cavity formed by the shell 10 and the base 11 is configured as two cavities, and the stator assembly 12 and the control circuit board 20 are respectively placed in different cavities. In the present application, the second embodiment is the preferred embodiment, and the following embodiments are all developed based on the second embodiment, that is, the stator assembly 12 and the control circuit board 20 are respectively placed in different cavities.

[0061] Specifically, in this embodiment, see Figure 7 and Figure 8, a partition plate 14 is provided in the shell 10. The partition plate 14 is fixedly connected to the inner wall of the shell 10. The partition plate 14 and the shell 10 can be integrally formed or fixedly connected by welding. The inner cavity formed by the shell 10 and the base 11 is divided into a first cavity 100 and a second cavity 101 by the partition plate 14. Preferably, the partition plate 14 extends radially. Of course, the partition plate 14 can also be inclined at a certain angle, and it is only necessary to separate the inner cavity formed by the shell 10 and the base 11 into two cavities. The first cavity 100 is partially connected to the second cavity 101 so that the metal connector 13 can be inserted into the first cavity 100 and the second cavity 101. Furthermore, the partition plate 14 and the end of the shell 10 facing away from the base 11 form the first cavity 100, and the partition plate 14 and the base 11 form the second cavity 101.

[0062] Further, the partition plate 14 is provided with a plurality of through holes 140. The through holes 140 are configured to connect the first cavity 100 and the second cavity 101. The metal connector 13 is inserted into the first cavity 100 and the second cavity 101 through the through holes 140. At least one metal connector 13 is correspondingly inserted in each through hole 140. For example, the magnetic levitation motor 1 includes 6 iron cores 120 and 6 stator windings 121, and the number of through holes 140 can be configured as 3 through holes 140, that is, 2 metal connectors 13 are correspondingly inserted in each through hole 140. Of course, the number of through holes 140 can also be 2, so that 3 metal connectors 13 are correspondingly inserted in each through hole 140. Those skilled in the art can determine the number of through holes 140 according to the actual number of metal connectors 13, so as to ensure that the metal connector 13 connects the stator winding 121 with the control circuit board 20, and the metal connector 13 inserted in each through hole 140 does not interfere too much.

[0063] In the above embodiment, the stator assembly 12 is arranged in the first cavity 100, and the control unit 2 is arranged in the second cavity 101. The stator assembly 12 and the control unit 2 are separated by a partition plate 14 and arranged in two cavities. The metal connector 13 is partially located in the first cavity 100 and partially located in the second cavity 101. The part of the metal connector 13 located in the first cavity 100 is configured to be electrically connected to the lead-out end 1210 of the stator winding 121. The metal connector 13 is fixed to the lead-out end 1210 of the stator winding 121 by welding. The part of the metal connector 13 located in the second cavity 101 is configured to be electrically connected to the control circuit board 20. The metal connector 13 is fixed to the control circuit board 20 by welding. In this embodiment, the metal connector 13 is used to electrically connect the lead-out end 1210 of the stator winding 121 to the control circuit board 20, thereby avoiding the problem of the lead-out end 1210 of the stator winding 121 being easily broken due to multiple disassembly when being directly welded to the control circuit board 20, thereby greatly improving the service life of the stator winding 121 and reducing the production cost.

[0064] In the present application, there are various configurations of the metal connector 13, as follows:

[0065] Example 1: See Figure 4 The metal connector 13 is configured as a metal needle 130, that is, each stator winding 121 corresponds to a metal needle 130, and the metal needle 130 is electrically connected to the lead-out terminal 1210 of the stator winding 121 and the control circuit board 20. Specifically, in the first cavity 100, one end of the metal needle 130 is fixedly connected to the lead-out terminal 1210 of the stator winding 121 by welding; in the second cavity 101, the other end of the metal needle 130 passes through the through hole 140 into the second cavity 101, and is fixedly connected to the control circuit board 20 by welding.

[0066] Specifically, the control circuit board 20 is provided with a plurality of connection holes. A metal needle 130 is correspondingly inserted into each connection hole. The other end of the metal needle 130 first penetrates into the second cavity 101 from the side of the control circuit board 20 close to the stator winding 121, then penetrates into the connection hole, and then penetrates out from the side of the control circuit board 20 away from the stator winding 121, and is fixedly connected to the side of the control circuit board 20 away from the stator winding 121 by welding, so that the lead-out end 1210 of the stator winding 121 and the control circuit board 20 are electrically connected together through the metal needle 130. The connection method through the metal needle 130 is simple and easy to operate, and the production cost is low. The lead-out end 1210 of the stator winding 121 and the control circuit board 20 can be indirectly connected by welding the metal needle 130 twice, thereby avoiding the problem that the lead-out end 1210 of the stator winding 121 is soft and easy to break. The overall structure is simple, and the placement control of the metal needle 130 in the magnetic levitation motor 1 is also convenient for arrangement. Therefore, Example 1 is the most preferred implementation of the connection structure of the metal connector 13 of the present application.

[0067] Example 2: See Figure 5The metal connector 13 is configured as a metal needle 130 and a crown spring 131, that is, each stator winding 121 corresponds to a metal needle 130 and a crown spring 131, and the electrical connection with the lead-out end 1210 of the stator winding 121 and the control circuit board 20 is realized by the structure of a metal needle 130 and a crown spring 131. Specifically, in the first cavity 100, one end of the metal needle 130 is fixedly connected to the lead-out end 1210 of the stator winding 121 by welding. In the second cavity 101, the crown spring 131 is arranged in the second cavity 101, and penetrates into the control circuit board 20 from the side of the control circuit board 20 adjacent to the stator winding 121 and is electrically connected thereto. The crown spring 131 is fixedly connected to the control circuit board 20 by welding. The other end of the metal needle 130 penetrates from the through hole 140 into the second cavity 101 and is electrically connected to the crown spring 131.

[0068] Specifically, each metal needle 130 is connected to a corresponding crown spring 131. A jack is provided on the side of the crown spring 131 near the metal needle 130. The other end of the metal needle 130 first penetrates into the second cavity 101 from the side of the control circuit board 20 near the stator winding 121, and then is inserted into the crown spring 131 from the jack, and abuts against the inner wall of the crown spring 131, so that the metal needle 130 is electrically connected to the crown spring 131, thereby realizing that the lead-out end 1210 of the stator winding 121 and the control circuit board 20 are electrically connected together through the metal needle 130 and the crown spring 131. The structure of the metal needle 130 and the crown spring 131 can realize the rapid plugging and unplugging of the metal needle 130 relative to the crown spring 131. During installation, the metal needle 130 only needs to be inserted into the crown spring 131 so that the two abut against each other, and the electrical connection between the stator winding 121 and the control circuit board 20 can be quickly realized. If the control circuit board 20 needs to be removed, the metal needle 130 only needs to be pulled out of the crown spring 131 to separate the two, and the control circuit board 20 can be removed, which is convenient for operation. This embodiment can quickly realize the plugging and unplugging of the metal needle 130, thereby facilitating the rapid connection and disassembly of the stator winding 121 and the control circuit board, which is convenient for operation and greatly improves the efficiency of installation and disassembly. During installation and disassembly, only the metal needle 130 needs to be plugged and unplugged, and there is no need to touch the stator winding 121 connected to the metal needle 130, thereby avoiding damage to the stator winding 121 and greatly improving the service life of the stator winding 121.

[0069] Example 3: See Figure 6The metal connector 13 is configured as a spring pin 132 and a pad 133, that is, each stator winding 121 corresponds to a spring pin 132 and a pad 133, and the electrical connection with the lead-out terminal 1210 of the stator winding 121 and the control circuit board 20 is realized through the structure of a spring pin 132 and a pad 133. In the first cavity 100, one end of the spring pin 132 is fixedly connected to the lead-out terminal 1210 of the stator winding 121 by welding. In the second cavity 101, the other end of the spring pin 132 passes through the through hole 140 into the second cavity 101, and is electrically connected to the pad 133, thereby realizing the electrical connection between the stator winding 121 and the control circuit board 20.

[0070] Specifically, the pad 133 is fixedly connected to the side of the control circuit board 20 adjacent to the stator winding 121 by welding, and is electrically connected to the control circuit board 20. Each spring pin 132 corresponds to a pad 133. The other end of the spring pin 132 first passes through the through hole 140 into the second cavity 101, and then abuts against the surface of the pad 133 to achieve electrical connection between the spring pin 132 and the pad 133, thereby achieving electrical connection between the lead-out end 1210 of the stator winding 121 and the control circuit board 20 through the spring pin 132 and the pad 133. The structure of the spring pin 132 and the pad 133 can enable the spring pin 132 to quickly abut and separate relative to the pad 133. During installation, the spring pin 132 only needs to abut against the pad 133 to quickly electrically connect the spring pin 132 and the pad 133, thereby quickly achieving electrical connection between the stator winding 121 and the control circuit board 20. If the control circuit board 20 needs to be disassembled, the spring pin 132 only needs to be separated from the pad 133, and the control circuit board 20 can be quickly disassembled, which is convenient for operation. This embodiment can quickly achieve the abutment and separation of the spring pin 132 and the pad 133, thereby facilitating the rapid connection and disassembly of the stator winding 121 and the control circuit board, which is convenient for operation and greatly improves the efficiency of installation and disassembly. During installation and disassembly, only the spring pin 132 needs to be abutted and separated, and there is no need to touch the stator winding 121 connected to the spring pin 132, thereby avoiding damage to the stator winding 121 and greatly improving the service life of the stator winding 121.

[0071] Example 4: See Figure 7, the metal connector 13 is configured as a metal needle 130 and an adapter plate 134, that is, each stator winding 121 corresponds to at least one metal needle 130, multiple stator windings 121 share one adapter plate 134, and multiple stator windings 121 are interconnected on the adapter plate 134. The relationship of electrical connection with the lead-out terminal 1210 of the stator winding 121 and the control circuit board 20 is realized by the structure of the metal needle 130 and the adapter plate 134 matching each other. The adapter plate 134 is arranged in the first cavity 100 and is fixedly connected to the shell. The adapter plate 134 is sleeved on the lower part of the iron core, and there is a certain distance between the bottom of the adapter plate 134 and the top of the partition plate 14. In the present application, the adapter plate 134 can be sleeved on the bottom outer edge of the iron core 120, or it can be arranged in the gap below the iron core 120. The configuration of the adapter plate 134 is selected according to the space in the magnetic levitation motor 1. The lead-out terminal 1210 of the stator winding 121 is fixedly connected to the upper portion of the adapter plate 134 by welding, and the two are electrically connected. Since the metal needle 130 is small and cylindrical, it is difficult to fix the lead-out terminal 1210 of the stator winding 121 on the metal needle 130. Therefore, the present embodiment uses the adapter plate 134 to weld the lead-out terminal 1210 of the stator winding 121 on the adapter plate 134, which is convenient for welding.

[0072] Specifically, each stator winding 121 corresponds to at least one metal needle 130. The lead-out end 1210 of the stator winding 121 is first welded to the adapter plate 134, and the metal needle 130 is welded at a position opposite to the lead-out end 1210 of the stator winding 121 in the axial direction, so as to realize the electrical connection between the lead-out end 1210 of the stator winding 121 and the metal needle 130. The stator winding 121 and the metal needle 130 are electrically connected through the adapter plate 134. In the first cavity 100, one end of the metal needle 130 is first fixedly connected to the lower part of the adapter plate 134 by welding, and the other end of the metal needle 130 passes through the through hole 140 into the second cavity 101, and is electrically connected to the control circuit board 20 by welding, thereby realizing the electrical connection between the stator winding 121 and the control circuit board 20. The structure in which the metal needle 130 cooperates with the adapter plate 134 can solve the problem that the stator winding 121 and the metal needle 130 are difficult to be welded and fixed together due to the thin metal needle 130. The lead-out end 1210 of the stator winding 121 and the adapter plate 134 are easy to be welded and fixed, thereby realizing the structure of interconnecting multiple stator windings 121 through the adapter plate 134, which is convenient for operation.

[0073] It should be noted that the above four configurations of the metal connector 13 are all intended to avoid the problem of the lead-out terminal 1210 of the stator winding 121 being directly welded on the control circuit board 20, which may be easily damaged after multiple disassemblies. Of course, the configurations of the metal connector 13 include but are not limited to these, and as long as they can solve the same technical problem and achieve the same technical effect, they all belong to the protection scope of this application. The preferred implementation method among the above four embodiments is embodiment 1, and those skilled in the art can select the configuration of the metal connector 13 according to actual needs to meet the technical problem to be solved by this application.

[0074] Specifically, in the present embodiment, a potting material is potted in the first cavity 100. The potting material may be epoxy resin or the like. The position of the metal connector 13 located in the first cavity 100 relative to the housing 10 is fixed by the potting material. The specific operation process is as follows: according to the structure of the metal connector 13 in Example 1, the stator assembly 12 is first assembled in the first cavity 100, and then one end of the metal needle 130 is welded and fixed to the lead-out end 1210 of the stator winding 121 in the first cavity 100, and then the other end of the metal needle 130 is passed through the through hole 140 on the partition plate 14, so that the metal needle 130 is connected to the connection hole on the control circuit board 20 correspondingly, but welding is not performed first, and the position of the metal needle 130 relative to the housing 10 only needs to be fixed. At this time, epoxy resin is poured into the first cavity 100 to fix the position of the metal needle 130 in the first cavity 100, thereby positioning the metal needle 130 relative to the housing 10, ensuring that when the control circuit board 20 is installed, the metal needle 130 can be accurately aligned with the connection hole, thereby achieving electrical connection between the stator winding 121 and the control circuit board 20 through the metal needle 130. This assembly process is easy to operate and can ensure accurate connection between the metal needle 130 and the connection hole.

[0075] For details, see Fig.13In this embodiment, the magnetic levitation motor 1 further includes a sensor 15 assembly disposed in the first cavity 100. The sensor 15 assembly includes a plurality of sensors 15, which are used to detect signals such as the position information of the rotor. Each sensor 15 corresponds to a lead wire 150. The existing method is to connect each lead wire 150 to the plug interface on the control circuit board 20 one by one, but this method requires a large number of lead wires 150 to be arranged in the magnetic levitation motor 1, which is troublesome to wire and requires more space, and requires a plurality of plug interfaces to be arranged on the control circuit board 20, which is troublesome in the production process and has a high production cost. In order to solve this problem, in this embodiment, the lead wires 150 of the plurality of sensors 15 are connected to the flexible flat cable 151 and are led out through the flexible flat cable 151; or a sensor 15 circuit board is disposed above the stator assembly 12, and the lead wires 150 of the plurality of sensors 15 are electrically connected to the sensor 15 circuit board, and the flexible flat cable 151 is electrically connected and led out from the sensor 15 circuit board. The above two methods of the lead wires 150 of the sensor 15 can be selected by technicians skilled in the art according to actual needs. Furthermore, a connection terminal is connected to the tail of the flexible flat cable 151 . The flexible flat cable 151 passes through the through hole 140 into the second cavity 101 and is electrically connected to the control circuit board 20 .

[0076] In one embodiment, see Fig.14 , a sensor socket 22 is provided on the side of the control circuit board 20 adjacent to the stator winding 121, that is, the sensor 15 plug interface is located between the control circuit board 20 and the partition plate 14. During assembly, the connection terminal inserted into the second cavity 101 needs to be plugged into the sensor socket 22 to achieve electrical connection between the connection terminal and the sensor socket 22, and then the control circuit board 20 is fixed. In this embodiment, the sensor socket 22 is arranged on the side of the control circuit board 20 adjacent to the stator winding 121, the sensor 15 lead wire 150 is shorter, and the production cost is lower.

[0077] In another embodiment, see Fig.11, a sensor connector 22 is provided on the side of the control circuit board 20 away from the stator winding 121, that is, the sensor connector 22 is located between the control circuit board 20 and the base 11. A notch 200 is provided on the outer edge of the control circuit board 20. The notch 200 is configured as a routing opening for the flexible flat cable 151, that is, a routing opening is provided between the control circuit board 20 and the inner wall of the housing 10. In order to ensure that the flexible flat cable 151 can pass through the routing opening without bending, the width of the notch 200 along the circumferential direction is set to be greater than the width of the flexible flat cable 151 in this embodiment. The flexible flat cable 151 first passes through the through hole 140 into the second cavity 101, and then passes through the notch 200 to the side where the sensor connector 22 is located, so that the connection terminal is electrically connected to the sensor connector 22, thereby realizing the electrical connection between multiple sensors 15 and the control circuit board 20. This embodiment does not need to connect the connecting terminal to the sensor socket 22 before installing the control circuit board 20. The operator can fix the control circuit board 20 and then connect the connecting terminal on the flexible flat cable 151 to the sensor socket 22, which is convenient for operation. The sensor socket 22 is arranged on the side of the control circuit board 20 adjacent to the stator winding 121. Since the space between the control circuit board 20 and the partition plate 14 is small, the flexible flat cable 151 is easily accumulated on this side, which may affect the signal transmission. The present embodiment can solve this problem. The flexible flat cable 151 is convenient for routing and connection.

[0078] Specifically, in this embodiment, combined with Figure 8-Figure 10 , a plurality of bosses 16 are provided along the outer circumference on one side of the partition plate 14 adjacent to the base 11. The plurality of bosses 16 are configured to carry and fix the control circuit board 20. The plurality of bosses 16 are arranged at intervals along the inner wall of the housing 10. The plurality of bosses 16 surround a circle, the outer diameter of which is greater than or equal to the outer diameter of the control circuit board 20, so that the plurality of bosses 16 can fully carry the control circuit board 20. The boss 16 and the housing 10 can be integrally formed, or can be fixedly connected by welding. At least one screw hole 160 is provided on the boss 16 along the axial direction, and a plurality of connection holes are provided on the control circuit board 20 along the outer circumference, and the connection holes and the screw holes 160 are aligned in the axial direction. The control circuit board 20 is covered on the side of the boss 16 away from the partition plate 14, and the connection holes and the screw holes 160 are sequentially penetrated between the control circuit board 20 and the boss 16 by screws to realize the fixed connection between the control circuit board 20 and the boss 16, and this fixing method is convenient for operation.

[0079] Specifically, in the present embodiment, a cylinder 141 extending in the axial direction is provided at the center of the partition plate 14. The cylinder 141 is inserted into the space formed by the multiple iron cores 120, making full use of the space between the multiple iron cores 120. The space formed by the multiple bosses 16 and the cylinder 141 is configured as a receiving cavity, and multiple electronic components are arranged on the control circuit board 20, and the receiving cavity is configured to receive multiple electronic components. The space formed by the boss 16 and the cylinder 141 in the axial direction is configured as a receiving cavity for multiple electronic components, so that the boss 16 plays a role in fixing the control circuit board 20 while realizing the placement of multiple electronic components in the magnetic levitation motor 1, so that the space utilization in the shell 10 is high, and the overall structure of the magnetic levitation motor 1 is compact.

[0080] The present invention also discloses a magnetic suspension pump 3, see Fig.14 and Fig.15 , including a pump head 30, a rotor impeller 31 and a stator winding 121 connection structure based on an integrated magnetic levitation motor 1. The pump head 30 cover is arranged on the top of the magnetic levitation motor 1 and is fixedly connected to the top of the housing 10 to form a space for placing the rotor. The rotor impeller 31 is partially located in the pump head 30 and cooperates with the stator assembly 12. The stator assembly 12 is configured to generate a magnetic field to drive the rotation and suspension of the rotor impeller 31. It should be noted that the rotor impeller 31 can be arranged inside the iron core 120 or outside the iron core 120, and those skilled in the art can arrange it according to actual needs. When the magnetic levitation pump 3 is in working state, the stator winding 121 can magnetically drive and support the rotor without contact in the operating state. For a magnetic levitation pump 3 with smaller power, its volume is also smaller. The control unit 2 is integrated into the magnetic levitation pump 3, and the stator winding 121 is electrically connected to the control circuit board 20 through a metal connector 13, which effectively solves the problem that the stator winding 121 is relatively soft and easy to be damaged, while also ensuring the miniaturization and compactness of the magnetic levitation pump 3.

[0081] 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 solution 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 will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A stator winding connection structure based on an integrated magnetic levitation motor, the magnetic levitation motor (1) comprising a housing (10), a base (11), a stator assembly (12) and a control unit (2) arranged in the housing, the base being fixedly connected to one end of the housing, the stator assembly comprising a plurality of iron cores (120) and a plurality of stator windings (121), at least one stator winding being wound around each of the iron cores, the stator winding being electrically connected to the control unit, characterized in that: The control unit comprises a control circuit board (20), the control circuit board has a first distance from the stator winding in the axial direction and is located below the stator winding, the housing is further provided with a partition plate (14) and a plurality of metal connectors (13), the plurality of metal connectors are arranged within the first distance, the partition plate is provided with a plurality of through holes (140), at least one metal connector is correspondingly passed through each of the through holes, each of the metal connectors is correspondingly connected to one of the stator windings, a side of the metal connector adjacent to the stator winding is configured to be electrically connected to a lead-out end (1210) of the stator winding, and a side adjacent to the control circuit board is configured to be electrically connected to the control circuit board; Wherein, the hardness of the metal connecting piece is greater than the hardness of the stator winding.

2. The stator winding connection structure based on the integrated magnetic levitation motor according to claim 1 is characterized in that: The partition plate is fixedly connected to the inner wall of the shell, and the inner cavity formed by the shell and the base is divided into a first cavity (100) and a second cavity (101) by the partition plate. The first cavity is partially connected to the second cavity. The partition plate and an end of the shell facing away from the base form the first cavity, and the partition plate and the base form the second cavity.

3. The stator winding connection structure based on the integrated magnetic levitation motor according to claim 2 is characterized in that: The through hole is configured to connect the first cavity and the second cavity, and the metal connecting piece is penetrated in the first cavity and the second cavity through the through hole.

4. The stator winding connection structure based on the integrated magnetic levitation motor according to claim 3 is characterized in that: The stator assembly is disposed in the first cavity, the control unit is disposed in the second cavity, the portion of the metal connector located in the first cavity is configured to be electrically connected to the lead-out end of the stator winding, and the portion of the metal connector located in the second cavity is configured to be electrically connected to the control circuit board.

5. The stator winding connection structure based on the integrated magnetic levitation motor according to claim 3 is characterized in that: The metal connector is configured as a metal needle (130), one end of the metal needle is fixedly connected to the lead-out end of the stator winding by welding, and the other end of the metal needle passes through the through hole into the second cavity.

6. The stator winding connection structure based on the integrated magnetic levitation motor according to claim 5, characterized in that: The control circuit board is provided with a plurality of connection holes, and a metal needle is correspondingly inserted into each of the connection holes. The other end of the metal needle passes through the connection hole from the side of the control circuit board adjacent to the stator winding, and comes out from the side of the control circuit board away from the stator winding, and is fixedly connected to the stator winding by welding.

7. The stator winding connection structure based on the integrated magnetic levitation motor according to claim 3 is characterized in that: The metal connector is configured as a metal needle (130) and a crown spring (131); one end of the metal needle is fixedly connected to the lead-out end of the stator winding by welding; the other end of the metal needle passes through the through hole into the second cavity; the crown spring is arranged in the second cavity and passes through the control circuit board from a side of the control circuit board adjacent to the stator winding and is electrically connected thereto; the other end of the metal needle is electrically connected to the crown spring.

8. The stator winding connection structure based on the integrated magnetic levitation motor according to claim 7 is characterized in that: Each of the metal needles is connected to a corresponding crown spring. A plug hole is provided on one side of the crown spring adjacent to the metal needle. The other end of the metal needle is correspondingly inserted into the crown spring from the plug hole and abuts against the inner wall of the crown spring.

9. The stator winding connection structure based on the integrated magnetic levitation motor according to claim 3, characterized in that: The metal connector is configured as a spring pin (132) and a solder pad (133), one end of the spring pin is fixedly connected to the lead-out end of the stator winding by welding, and the other end of the spring pin passes through the through hole into the second cavity and is electrically connected to the solder pad.

10. The stator winding connection structure based on the integrated magnetic levitation motor according to claim 9, characterized in that: The pad is fixedly connected to the side of the control circuit board adjacent to the stator winding by welding and is electrically connected to the control circuit board. Each spring pin corresponds to one pad, and the other end of the spring pin abuts against the surface of the pad.

11. The stator winding connection structure based on the integrated magnetic levitation motor according to claim 3, characterized in that: The metal connector is configured as a metal needle (130) and an adapter plate (134); the adapter plate is disposed in the first cavity and fixedly connected to the shell; the adapter plate is sleeved on the lower part of the iron core; a certain distance is provided between the bottom of the adapter plate and the top of the partition plate; the lead-out end of the stator winding is fixedly connected to the upper part of the adapter plate by welding, and the two are electrically connected; the stator winding and the metal needle are electrically connected via the adapter plate.

12. The stator winding connection structure based on the integrated magnetic levitation motor according to claim 11, characterized in that: Each stator winding corresponds to at least one of the metal needles, one end of the metal needle passes through the adapter plate and is fixedly connected to the upper part of the adapter plate by welding, and the other end of the metal needle passes through the through hole into the second cavity and is electrically connected to the control circuit board.

13. The stator winding connection structure based on an integrated magnetic levitation motor according to any one of claims 2 to 12, characterized in that: The first cavity is filled with a potting material, and the position of the metal connector in the first cavity relative to the shell is fixed by the potting material.

14. The stator winding connection structure based on the integrated magnetic levitation motor according to claim 3, characterized in that: The magnetic levitation motor further comprises a sensor assembly arranged in the first cavity, the sensor assembly comprising a plurality of sensors (15), lead wires (150) of the plurality of sensors being led out through a flexible flat cable (151), a tail of the flexible flat cable being connected to a connection terminal, the flexible flat cable being passed through the through hole into the second cavity and being electrically connected to the control circuit board.

15. The stator winding connection structure based on the integrated magnetic levitation motor according to claim 14, characterized in that: A sensor socket (22) is provided on one side of the control circuit board adjacent to the stator winding, and the connection terminal is electrically connected to the sensor socket.

16. The stator winding connection structure based on the integrated magnetic levitation motor according to claim 14, characterized in that: A sensor socket is provided on a side of the control circuit board away from the stator winding, and a notch (200) is provided on the outer edge of the control circuit board. The notch is configured as a routing opening for the flexible flat cable. The flexible flat cable passes through the notch to the side where the sensor socket is located, and the connecting terminal is electrically connected to the sensor socket; wherein the width of the notch along the circumferential direction is greater than the width of the flexible flat cable.

17. The stator winding connection structure based on the integrated magnetic levitation motor according to claim 1, characterized in that: A plurality of bosses (16) are provided along the outer circumference of one side of the partition plate adjacent to the base, the plurality of bosses are configured to support and fix the control circuit board, at least one screw hole (160) is provided on the boss along the axial direction, a plurality of connection holes are provided on the control circuit board along the outer circumference, the control circuit board cover is provided on the side of the boss away from the partition plate, and the control circuit board and the boss are fixedly connected by screws passing through the connection holes and the screw holes in sequence.

18. The stator winding connection structure based on the integrated magnetic levitation motor according to claim 17, characterized in that: A cylinder (141) extending in the axial direction is provided at the center of the partition plate. The cylinder is inserted into the space formed by the multiple iron cores. The space formed by the multiple bosses and the cylinder is configured as a receiving cavity. Multiple electronic components are provided on the control circuit board. The receiving cavity is configured to receive the multiple electronic components.

19. A magnetic levitation pump, characterized in that: The invention comprises a pump head (30), a rotor impeller (31) and a stator winding connection structure based on an integrated magnetic levitation motor as described in any one of claims 1 to 18, wherein the pump head cover is arranged on the top of the magnetic levitation motor and is fixedly connected to the top of the shell, the rotor impeller part is located in the pump head and cooperates with the stator assembly, and the stator assembly is configured to generate a magnetic field to drive the rotor impeller to rotate and levitate.

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