A magnetic levitation motor stator, a magnetic levitation motor and an assembly method

Abstract

The application provides a magnetic suspension motor stator, a magnetic suspension motor and an assembling method, the magnetic suspension motor stator comprises a magnetic yoke fixing seat, a first magnetic yoke, a magnetic yoke fixing structure, a coil assembly, a sensor, a circuit board, a second magnetic yoke, a fixing plate and a connecting support structure, the first magnetic yoke is limited in the axial and radial directions through the magnetic yoke fixing seat, the magnetic yoke fixing structure, the second magnetic yoke and the fixing plate, the installation stability of the first magnetic yoke can be improved, and then the accuracy of the stator checking link is improved; the motor stator can be assembled outside the motor shell, so that the sensor and other components can be checked and debugged after the motor stator is assembled, the motor stator can be quickly disassembled and adjusted during the debugging process, and the assembling efficiency of the stator is improved; meanwhile, the stability of the overall structure of the motor stator is improved by cooperating with the connecting support structure, and the influence of the vibration generated during the operation of the motor on the stability of the motor can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of magnetic levitation motor, and particularly to a magnetic levitation motor stator, a magnetic levitation motor and an assembling method. BACKGROUND

[0002] As an advanced driver that realizes the non-contact suspension and rotation of the rotor by using the magnetic field force, the magnetic levitation motor has a broad application prospect in the fields of biochemistry, medical pharmacy, semiconductor manufacturing and other fields with extremely high requirements for ultra-clean environment due to its advantages of no mechanical friction, no particle precipitation and high cleanliness. The magnetic levitation motor generally comprises a stator and a rotor.

[0003] In the existing magnetic levitation motor stator structure, the stator core and other components are directly installed and fixed in the motor shell, and the motor stator is limited and supported by the motor shell. However, this installation method is not convenient for subsequent debugging and maintenance, and there are problems such as difficult wiring adjustment, limited sensor position adjustment, etc. For example, if the wiring mode of the stator winding needs to be adjusted, the connection state of the wiring terminal needs to be checked, etc., the operation space is extremely limited; or the entire stator assembly needs to be disassembled from the motor shell, which is tedious and time-consuming. SUMMARY

[0004] In order to solve the above technical problems, the present application provides a magnetic levitation motor stator, a magnetic levitation motor and an assembling method.

[0005] In a first aspect of the present application, a magnetic levitation motor stator is provided, comprising a magnetic yoke fixing seat, a first magnetic yoke, a magnetic yoke fixing structure, a coil assembly, a sensor, a circuit board, a second magnetic yoke, a fixing plate and a connecting support structure.

[0006] The first magnetic yoke comprises a first section arranged in the radial direction and a second section extending axially from one end of the first section; the second section is inserted into the magnetic yoke fixing seat, and the end portion extends into the magnetic yoke mounting hole of the second magnetic yoke; the top of the first magnetic yoke is formed with a first top surface, and the periphery of the first top surface is concave to form a second top surface;

[0007] The magnetic yoke fixing structure covers the second top surface and is connected with the magnetic yoke fixing seat; the circuit board is arranged below the magnetic yoke fixing seat; the sensor is arranged on the magnetic yoke fixing seat;

[0008] The coil assembly is sleeved on the second section and located between the magnetic yoke fixing seat and the second magnetic yoke; the fixing plate is arranged at the bottom of the second magnetic yoke; one end of the connecting support structure is inserted into the second magnetic yoke and connected with the fixing plate, and the other end is connected with the magnetic yoke fixing seat.

[0009] In some embodiments of the present application, the magnetic yoke fixing structure comprises a plurality of magnetic yoke fixing units, each of which fixes one first magnetic yoke.

[0010] In some embodiments of the present application, the magnetic yoke fixing unit comprises a fixing part and a mounting part, both ends of the fixing part are connected with the mounting part; the fixing part and the mounting part are integrally formed.

[0011] In some embodiments of the present application, the mounting part extends towards the shaft center, a clamping groove is formed between the mounting part and the fixing part; the connecting surface between the first top surface and the second top surface of the first magnetic yoke is clamped with the clamping groove.

[0012] In some embodiments of the present application, the magnetic yoke fixing structure is annular, and can fix a plurality of first magnetic yokes at the same time.

[0013] In some embodiments of the present application, the magnetic yoke fixing structure is made of non-magnetic material.

[0014] In some embodiments of the present application, the end surface of the second segment of the first magnetic yoke towards the shaft center is a circular arc surface.

[0015] In some embodiments of the present application, a plurality of mounting through grooves extending along the axial direction are formed on the magnetic yoke fixing seat, and the plurality of mounting through grooves are uniformly distributed along the circumferential direction.

[0016] In some embodiments of the present application, a glue pouring groove is arranged around the mounting through groove and extends in the same direction as the mounting through groove.

[0017] In some embodiments of the present application, the magnetic yoke fixing seat comprises a first fixing seat and a second fixing seat arranged on the top surface of the first fixing seat; a third top surface is formed on the top of the second fixing seat, the outer periphery of the third top surface is concave to form a fourth top surface, when the first magnetic yoke is installed in the mounting through groove, the third top surface is flush with the first top surface, and the fourth top surface is flush with the second top surface.

[0018] In some embodiments of the present application, between every two mounting through grooves, the outer periphery of the second fixing seat is concave to form a sensor mounting groove in the radial direction; a sensor mounting hole extending in the radial direction and penetrating through the second fixing seat is formed on the inner wall surface of the sensor mounting groove.

[0019] In some embodiments of the present application, a plurality of truncated through grooves are arranged on the second magnetic yoke, and the truncated through grooves and the magnetic yoke mounting hole are in communication with each other.

[0020] In some embodiments of the present application, the truncated through groove is arranged on the side of the second magnetic yoke away from the shaft center.

[0021] In some embodiments of the present application, a glue pouring groove is arranged around the magnet yoke mounting hole and extends in the same direction as the magnet yoke mounting hole and is in communication with the magnet yoke mounting hole.

[0022] In some embodiments of the present application, the coil assembly comprises a coil fixing sleeve, a first coil and a second coil; the first coil and the second coil are uniformly arranged on the coil fixing sleeve.

[0023] In some embodiments of the present application, the coil fixing sleeve comprises a hollow fixing sleeve body and a ring-shaped coil blocking part; the ring-shaped coil blocking part is arranged at both ends and the middle of the fixing sleeve body, forming a first coil arrangement space and a second coil arrangement space.

[0024] In some embodiments of the present application, a glue pouring groove is arranged around the inner hole of the coil fixing sleeve and extends in the same direction as the inner hole and is in communication with the inner hole.

[0025] In a second aspect of the present application, a magnetic levitation motor is provided, comprising the above-mentioned magnetic levitation motor stator and a motor housing, wherein the magnetic levitation motor stator is arranged in the motor housing.

[0026] In a third aspect of the present application, an assembly method of the above-mentioned magnetic levitation motor stator is provided, comprising the following steps:

[0027] Step S1, mounting a sensor and a circuit board on a magnet yoke fixing seat;

[0028] Step S2, inserting a first magnet yoke into the magnet yoke fixing seat;

[0029] Step S3, mounting a magnet yoke fixing structure to press the second top surface of the first magnet yoke;

[0030] Step S4, mounting a connecting support structure on the magnet yoke fixing seat;

[0031] Step S5, turning the assembly obtained in step S4 by 180°, sleeving a coil assembly on the first magnet yoke, and wiring the coil assembly;

[0032] Step S6, mounting a second magnet yoke, so that the end of the first magnet yoke is inserted into the magnet yoke mounting hole of the second magnet yoke;

[0033] Step S7, mounting a fixing plate;

[0034] Step S8, debugging the assembly obtained in step S7;

[0035] Step S9, placing the debugged assembly into a motor housing and pouring glue.

[0036] In a fourth aspect of the present application, an assembly method of the above-mentioned magnetic levitation motor stator is provided, comprising the following steps:

[0037] Step S1, install the sensor and the circuit board on the magnetic yoke fixing seat;

[0038] Step S2, insert the first magnetic yoke into the magnetic yoke fixing seat;

[0039] Step S3, install the magnetic yoke fixing structure to press the second top surface of the first magnetic yoke;

[0040] Step S4, install the connecting support structure on the magnetic yoke fixing seat;

[0041] Step S5, turn over the assembly obtained in Step S4 by 180°, set the coil assembly on the first magnetic yoke, and wire the coil assembly;

[0042] Step S6, install the second magnetic yoke, so that the end of the first magnetic yoke is inserted into the magnetic yoke mounting hole of the second magnetic yoke;

[0043] Step S7, install the fixing plate;

[0044] Step S8, debug the assembly obtained in Step S7;

[0045] Step S9, put the debugged assembly into the motor shell, and remove the magnetic yoke fixing structure;

[0046] Step S10, glue pouring.

[0047] Compared with the prior art, the magnetic suspension motor stator has the following advantages and beneficial effects: the magnetic suspension motor stator includes a magnetic yoke fixing seat, a first magnetic yoke, a magnetic yoke fixing structure, a coil assembly, a sensor, a circuit board, a second magnetic yoke, a fixing plate, and a connecting support structure, the first magnetic yoke is limited in the axial and radial directions by the magnetic yoke fixing seat, the magnetic yoke fixing structure, the second magnetic yoke, and the fixing plate, the installation stability of the first magnetic yoke is improved, and the accuracy of the stator verification link is improved; the motor stator can be assembled outside the motor shell, the sensor and other components can be verified and debugged after the motor stator is assembled, the motor stator can be quickly disassembled and adjusted during the debugging process, and the assembly efficiency of the motor stator is improved; meanwhile, the stability of the overall structure of the motor stator is improved by cooperating with the connecting support structure, and the influence of the vibration generated during the operation of the motor on the stability of the motor is reduced.

[0048] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present text. BRIEF DESCRIPTION OF DRAWINGS

[0049] The drawings constituting a part of the present text are used to provide a further understanding of the present text, the illustrative embodiments of the present text and the description thereof are used to explain the present text, and do not constitute an improper limitation on the present text. In the drawings:

[0050] Figure 1 is an exploded view of the magnetic suspension motor stator provided by an example embodiment of the present application;

[0051] Figure 2 is a structural schematic view of the magnetic suspension motor stator provided by an example embodiment of the present application;

[0052] Figure 3 is a front view of the magnetic suspension motor stator provided by an example embodiment of the present application;

[0053] Figure 4 is a cross-sectional view at A-A in the Figure 3

[0054] Figure 5 is a top view of the magnetic suspension motor stator provided by an example embodiment of the present application;

[0055] Figure 6 is a bottom view of the magnetic suspension motor stator provided by an example embodiment of the present application;

[0056] Figure 7 is an exploded view of the first magnetic yoke and coil assembly provided by an example embodiment of the present application;

[0057] Figure 8 is an exploded view of the magnetic suspension motor stator and motor housing provided by an example embodiment of the present application.

[0058] in the figure:

[0059] 10, motor housing; 20, magnetic suspension motor stator;

[0060] 201, magnetic yoke fixing seat; 2011, first fixing seat; 2012, second fixing seat; 2013, mounting through slot; 2014, third top surface; 2015, fourth top surface; 2016, sensor mounting slot; 2017, sensor mounting hole; 202, first magnetic yoke; 2021, first section; 2021A, first top surface; 2021B, second top surface; 2021C, circular surface; 2022, second section; 203, magnetic yoke fixing structure; 2031, mounting portion; 2032, fixing portion; 2033, clamping groove; 204, coil assembly; 2041, coil fixing sleeve; 2041A, sleeve body; 2041B, annular coil blocking portion; 2042, first coil; 2043, second coil; 205, sensor; 206, circuit board; 207, second magnetic yoke; 2071, magnetic yoke mounting hole; 2072, truncated through slot; 208, fixing plate; 210, connecting support structure; 211, glue filling groove. DETAILED DESCRIPTION

[0061] ​To make the purposes, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the range of protection of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other in any manner without conflict.

[0062] As an advanced driver that realizes non-contact suspension and rotation of a rotor by using magnetic force, the magnetic levitation motor shows a broad application prospect in the fields of biochemistry, medical pharmacy, semiconductor manufacturing, and other fields with extremely high requirements for ultrapure environment, due to its significant advantages of no mechanical friction, no particle precipitation, and high cleanliness. The magnetic levitation motor generally includes a stator and a rotor.

[0063] In the existing magnetic levitation motor stator structure, the stator core and other components are directly installed and fixed inside the motor shell, and the motor shell is used to limit and support the motor stator. However, this installation method is not convenient for subsequent debugging and maintenance, and may have problems such as difficult wiring adjustment, limited sensor position adjustment, and the like. For example, if the wiring mode of the stator winding needs to be adjusted, the connection state of the wiring terminal needs to be checked, and the like, the operation space is extremely limited; or the entire stator assembly needs to be disassembled from the motor shell, which is tedious and time-consuming.

[0064] Based on this, the example embodiments of the present application provide a magnetic levitation motor stator, a magnetic levitation motor, and an assembly method. The magnetic levitation motor stator includes a magnetic yoke fixing seat, a first magnetic yoke, a magnetic yoke fixing structure, a coil assembly, a sensor, a circuit board, a second magnetic yoke, a fixing plate, and a connecting support structure. The first magnetic yoke is limited in the axial and radial directions by the magnetic yoke fixing seat, the magnetic yoke fixing structure, the second magnetic yoke, and the fixing plate, which can improve the installation stability of the first magnetic yoke, and further improve the accuracy of the stator verification link. The motor stator can be assembled outside the motor shell, which is convenient for verifying and debugging the sensor and other components after the motor stator is assembled, facilitates quick disassembly and adjustment during the debugging process, and improves the assembly efficiency of the stator. At the same time, the stability of the overall structure of the motor stator is improved by cooperating with the connecting support structure, which can reduce the influence of the vibration generated during the operation of the motor on the stability of the motor.

[0065] Embodiment 1:

[0066] An example embodiment of the present application provides a magnetic levitation motor stator, as shown in Figures 1 to 6As shown, the magnetic suspension motor stator comprises a magnetic yoke fixing seat 201, a first magnetic yoke 202, a magnetic yoke fixing structure 203, a coil assembly 204, a sensor 205, a circuit board 206, a second magnetic yoke 207, a fixing plate 208 and a connecting support structure 210; wherein, as shown in the figure, Figure 7 As shown, the first magnetic yoke 202 comprises a first section 2021 arranged radially and a second section 2022 extending axially from one end of the first section 2021; the second section 2022 of the first magnetic yoke 202 can be inserted into the magnetic yoke fixing seat 201, and the end of the second section 2022 of the first magnetic yoke 202 extends into the magnetic yoke mounting hole 2071 of the second magnetic yoke 207, so that the first magnetic yoke 202 can be positioned and fixed by the magnetic yoke fixing seat 201 and the second magnetic yoke 207; a first top surface 2021A is formed on the top of the first magnetic yoke 202, and a second top surface 2021B is concave on the periphery of the first top surface 2021A; the magnetic yoke fixing structure 203 covers the second top surface 2021B, and is connected with the magnetic yoke fixing seat 201; preferably, threaded holes are formed on the magnetic yoke fixing structure 203 and the magnetic yoke fixing seat 201, and the positions of the threaded holes are matched with each other; when the magnetic yoke fixing structure 203 covers the second top surface 2021B of the first magnetic yoke 202, the magnetic yoke fixing structure 203 can be fixed by fasteners, so as to limit the axial and radial directions of the first magnetic yoke 202, prevent the first magnetic yoke 202 from being pulled out of the magnetic yoke fixing seat 201, and improve the installation stability of the first magnetic yoke 202; in this way, the magnetic flux path can be optimized, the stability of the magnetic field can be maintained when the magnetic suspension motor stator is checked or the motor is working, the magnetic field distortion can be reduced, the anti-interference performance of the magnetic field can be improved, the accuracy of the stator checking can be improved, and the risk of dynamic deviation of the rotor during the suspension of the motor during operation can be reduced.

[0067] Preferably, when the magnetic yoke fixing structure 203 covers the second top surface 2021B and is fixed with the magnetic yoke fixing seat 201, the top surface of the magnetic yoke fixing structure 203 is flush with the first top surface 2021A, so that the first magnetic yoke 202 is fixed, and at the same time, the thickness of the first magnetic yoke 202 is not increased, and no additional motor stator installation space is occupied.

[0068] Preferably, the end face of the second section 2022 of the first magnetic yoke 202 towards the shaft center is a circular arc surface 2021C. In this way, the spacing between the rotor and the circular arc surface 2021C of the first magnetic yoke 202 is uniform, the magnetic gap of the magnetic field is uniform, and the running stability of the rotor and the overall stability of the motor can be improved.

[0069] The circuit board 206 is arranged below the magnetic yoke fixing seat 201; the through hole on the circuit board 206 is matched with the cross-sectional shape of the second section 2022 of the first magnetic yoke 202, so that the first magnetic yoke 202 can pass through.

[0070] The magnetic yoke fixing seat 201 comprises a first fixing seat 2011 and a second fixing seat 2012 arranged on the top surface of the first fixing seat 2011; the second fixing seat 2012 protrudes axially from the first fixing seat 2011; a plurality of mounting holes are arranged around the second fixing seat 2012 on the first fixing seat 2011 and are equidistantly distributed along the circumference, and the mounting holes are used to realize the connection with the connecting support structure 210; a plurality of mounting through grooves 2013 extending along the axial direction are formed on the magnetic yoke fixing seat 201, the shape of the mounting through groove 2013 is matched with the cross-sectional shape of the second section 2022 of the first magnetic yoke 202; for example, the cross-sectional shape of the second section 2022 of the first magnetic yoke 202 in the present application is rectangular, and thus the shape of the mounting through groove 2013 is a rectangular shape matched therewith; the plurality of mounting through grooves 2013 are uniformly distributed along the circumferential direction, so that the plurality of first magnetic yokes 202 are uniformly distributed along the circumferential direction, which can ensure uniform distribution of the magnetic field and improve the stability of the magnetic field.

[0071] Preferably, in order to facilitate glue pouring, a glue pouring groove 211 is arranged around the mounting through groove 2013 and is connected with the mounting through groove 2013 in the same extension direction. As shown in the figure, the glue pouring groove 211 is arranged at each corner of the mounting through groove 2013, so as to pour glue into the glue pouring groove 211 and realize uniform and stable fixing of the first magnetic yoke 202. Figure 1

[0072] In order to facilitate installation and fixing of the magnetic yoke fixing structure 203, a third top surface 2014 is formed on the top of the second fixing seat 2012, and the outer periphery of the third top surface 2014 is concave to form a fourth top surface 2015; when the first magnetic yoke 202 is installed in the mounting through groove 2013, the third top surface 2014 is flush with the first top surface 2021A, and the fourth top surface 2015 is flush with the second top surface 2021B. In this way, the magnetic yoke fixing structure 203 can be covered on the second fixing seat 2012 and is fixed by fasteners, the bottom surface of the magnetic yoke fixing structure 203 presses the fourth top surface 2015 of the second fixing seat 2012 and the second top surface 2021B of the first magnetic yoke 202, thereby realizing axial and radial limiting and fixing of the first magnetic yoke 202 and preventing the first magnetic yoke 202 from moving in the circumferential and radial directions.

[0073] On the second fixing seat 2012, between every two mounting through grooves 2013, the outer periphery of the second fixing seat 2012 is concave in the radial direction to form a sensor mounting groove 2016, and a sensor mounting hole 2017 extending along the radial direction and penetrating through the second fixing seat 2012 is formed on the inner wall surface of the sensor mounting groove 2016. Preferably, the outer circle of the sensor 205 is provided with external threads matched with the internal threads of the sensor mounting hole 2017, so as to realize installation of the sensor 205. Through the sensor mounting groove 2016, the distance between the detection end of the sensor 205 and the axis can be adjusted in real time during the debugging process, thereby improving the convenience of debugging and the accuracy of stator checking.​

[0074] The magnetic yoke fixing structure 203 includes a plurality of magnetic yoke fixing units, each of which fixes a first magnetic yoke 202. The magnetic yoke fixing units are in the form of a sheet structure, and each of the magnetic yoke fixing units is not connected to each other, so as to provide space for installation and debugging of the sensor 205. The magnetic yoke fixing unit includes a fixing portion 2032 and a mounting portion 2031, and the two ends of the fixing portion 2032 are respectively connected with the mounting portion 2031; the fixing portion 2032 and the mounting portion 2031 are integrally formed. The mounting portion 2031 extends towards the axial direction, so that the mounting portion 2031 and the fixing portion 2032 form a clamping groove 2033. The connecting surface between the first top surface 2021A and the second top surface 2021B of the first magnetic yoke 202 is clamped with the clamping groove 2033, and when the magnetic yoke fixing unit is installed on the magnetic yoke fixing seat 201, the first magnetic yoke 202 can be clamped in the clamping groove 2033, so that the axial movement of the first magnetic yoke 202 can be limited.

[0075] Preferably, the magnetic yoke fixing structure 203 is made of a non-magnetic material, which does not affect the distribution of the magnetic field, and has a small thickness. After being installed on the magnetic yoke fixing seat 201, the top surface of the magnetic yoke fixing structure 203 is flush with or lower than the third top surface 2014 of the magnetic yoke fixing seat 201. Preferably, the magnetic yoke fixing structure 203 is made of steel, so that the magnetic yoke fixing structure 203 has high strength while having a small thickness.

[0076] As shown in Figures 2 to 4 , the coil assembly 204 is sleeved on the second segment 2022 of the first magnetic yoke 202 and located between the magnetic yoke fixing seat 201 and the second magnetic yoke 207; as shown in Figure 7 , the coil assembly 204 includes a coil fixing sleeve 2041, a first coil 2042 and a second coil 2043; the first coil 2042 and the second coil 2043 are uniformly wound on the coil fixing sleeve 2041. The coil fixing sleeve 2041 is preferably made of a non-conductive and non-magnetic material, such as rubber, which can prevent damage to the coil. The coil assembly 204 is in a modular form, and before the assembly of the stator, the coil assembly 204 can be made first, and then the coil assembly 204 and other parts of the stator are installed. This not only facilitates the assembly of the stator and improves the assembly efficiency, but also facilitates the maintenance of the stator and the replacement of the coil assembly 204.

[0077] The coil fixing sleeve 2041 comprises a hollow fixing sleeve body 2041A and a ring-shaped coil blocking part 2041B; the ring-shaped coil blocking part 2041B is arranged at both ends and the middle part of the fixing sleeve body 2041A, forming a first coil 2042 winding space and a second coil 2043 winding space; the first coil 2042 is wound in the first coil 2042 winding space, and the second coil 2043 is wound in the second coil 2043 winding space; for example, the first coil 2042 can be a suspension coil, which can provide suspension force for the rotor; the second coil 2043 is a rotating coil, which can provide rotating force for the rotor. In order to facilitate glue pouring, a glue pouring groove 211 extending in the same direction as the inner hole of the coil fixing sleeve 2041 and communicating with each other is arranged around the inner hole of the coil fixing sleeve 2041.

[0078] As shown in Figure 1 The top surface and the bottom surface of the second magnetic yoke 207 are parallel to each other, the second magnetic yoke 207 is a planar magnetic yoke, and a plurality of truncated through grooves 2072 are arranged on the second magnetic yoke 207, each of which communicates with a corresponding magnetic yoke mounting hole 2071. The truncated through groove 2072 can cut off the eddy current generated on the second magnetic yoke 207 around the magnetic yoke mounting hole 2071, so as to reduce the heat generated by the eddy current and reduce the energy loss of the motor. Preferably, the truncated through groove 2072 is arranged on the side of the second magnetic yoke 207 away from the shaft center, the truncated through groove 2072 penetrates the top and bottom of the second magnetic yoke 207, and the width is relatively narrow, which can ensure the installation stability of the first magnetic yoke 202 while cutting off the eddy current. In order to facilitate glue pouring, a glue pouring groove 211 extending in the same direction as the magnetic yoke mounting hole 2071 and communicating with each other is arranged around the magnetic yoke mounting hole 2071.

[0079] One end of the connecting support structure 210 is inserted into the second magnetic yoke 207 and connected with the fixing plate 208, and the other end is connected with the magnetic yoke fixing seat 201; preferably, the connecting support structure 210 is a connecting nut column; the fixing plate 208 is arranged at the bottom of the second magnetic yoke 207 and connected and fixed with the connecting support structure 210 through a fastener.

[0080] Example 2:

[0081] An exemplary embodiment of this application provides a stator for a magnetic levitation motor. Based on Embodiment 1 described above, the main difference between this embodiment and Embodiment 1 is that the magnetic yoke fixing structure 203 is annular, and multiple evenly distributed snap-fit ​​grooves 2033 facing the axis are provided on the magnetic yoke fixing structure 203. The shape of the snap-fit ​​grooves 2033 is adapted to the shape of the first magnetic yoke 202, allowing the magnetic yoke fixing structure 203 to simultaneously fix multiple first magnetic yokes 202. When the motor is small, such as a small motor or micro motor, to save installation space, after debugging and before potting the stator in the motor housing 10, the magnetic yoke fixing structure 203 can be removed from the stator before potting. In this case, the magnetic yoke fixing structure 203 is used as a tooling for fixing the first magnetic yoke 202 and can be reused for assembling other motor stators. Preferably, when the magnetic yoke fixing structure 203 is used as a tooling for fixing the first magnetic yoke 202, the magnetic yoke fixing structure 203 can have a larger thickness to increase its structural strength.

[0082] Example 3:

[0083] An exemplary embodiment of this application provides a magnetic levitation motor, such as Figure 8 As shown, the magnetic levitation motor includes a magnetic levitation motor stator 20 as in embodiment 1 or 2 and a motor housing 10, with the magnetic levitation motor stator 20 disposed inside the motor housing 10.

[0084] Example 4:

[0085] An exemplary embodiment of this application provides a method for assembling a stator of a magnetic levitation motor as described in Embodiment 1 or 2, the assembly method comprising the following steps:

[0086] Step S1: Install multiple sensors 205 sequentially into the sensor mounting holes 2017 of the magnetic yoke fixing base 201, such that one end of the sensor coil faces the axis and both ends of the sensor coil protrude from the sensor; install the circuit board 206 on the magnetic yoke fixing base 201 and install fasteners to fix the circuit board 206 to the magnetic yoke fixing base 201; connect both ends of the sensor coil to the circuit board 206.

[0087] Step S2: Insert multiple first magnetic yokes 202 into the magnetic yoke fixing seat 201 in sequence; so that the arc surface 2021C of the second segment 2022 of the first magnetic yoke 202 faces the axis, and the bottom surface of the second segment 2022 of the first magnetic yoke 202 abuts against the magnetic yoke fixing seat 201. At this time, the first top surface 2021A of the first magnetic yoke 202 is flush with the third top surface 2014 of the second fixing seat 2012, and the second top surface 2021B is flush with the fourth top surface 2015.

[0088] Step S3, install the magnetic yoke fixing structure 203, and fix the magnetic yoke fixing structure 203 with the magnetic yoke fixing seat 201 through fasteners, so that the magnetic yoke fixing structure 203 is pressed against the second top surface 2021B of the first magnetic yoke 202; at this time, the top surface of the magnetic yoke fixing structure 203 is flush with the first top surface 2021A of the first magnetic yoke 202 and the third top surface 2014 of the second fixing seat 2012. Preferably, the magnetic yoke fixing structure 203 includes a plurality of magnetic yoke fixing units, and each magnetic yoke fixing unit fixes one first magnetic yoke 202.

[0089] Step S4, install a plurality of connection support structures 210 on the magnetic yoke fixing seat 201 in sequence, and fix them through fasteners to obtain an assembly;

[0090] Step S5, turn the assembly obtained in step S4 by 180°, and sequentially set a plurality of coil assemblies 204 on the first magnetic yoke 202, and wire the coil assemblies 204 to realize electrical connection between the coil assemblies 204 and the circuit board 206;

[0091] Step S6, install the second magnetic yoke 207, so that the end of the first magnetic yoke 202 is inserted into the magnetic yoke mounting hole 2071 of the second magnetic yoke 207; and the end of the connection support structure 210 is inserted into the second magnetic yoke 207.

[0092] Step S7, install the fixing plate 208, and install fasteners to fix the fixing plate 208 with the second magnetic yoke 207 and the connection support structure 210; obtain an assembly;

[0093] Step S8, debug the assembly obtained in step S7;

[0094] Step S9, place the debugged assembly into the motor housing 10, and perform glue pouring.

[0095] Example 5:

[0096] An example embodiment of the present application provides an assembly method of the magnetic suspension motor stator of example 1 or 2, which comprises the following steps:

[0097] Step S1, sequentially install a plurality of sensors 205 in the sensor mounting hole 2017 of the magnetic yoke fixing seat 201, so that one end of the coil of the sensor is arranged towards the shaft center, and both ends of the coil of the sensor are drawn out from the sensor; install the circuit board 206 on the magnetic yoke fixing seat 201, and install fasteners to fix the circuit board 206 with the magnetic yoke fixing seat 201; connect both ends of the sensor coil with the circuit board 206;

[0098] Step S2, sequentially insert multiple first magnetic yokes 202 into the magnetic yoke fixing seat 201; so that the circular arc surface 2021C of the second section 2022 of the first magnetic yoke 202 is arranged towards the shaft center, and the bottom surface of the second section 2022 of the first magnetic yoke 202 abuts against the magnetic yoke fixing seat 201; at this time, the first top surface 2021A of the first magnetic yoke 202 is flush with the third top surface 2014 of the second fixing seat 2012, and the second top surface 2021B is flush with the fourth top surface 2015.

[0099] Step S3, install the magnetic yoke fixing structure 203, and fix the magnetic yoke fixing structure 203 with the magnetic yoke fixing seat 201 through fasteners, so as to press the second top surface 2021B of the first magnetic yoke 202; at this time, the top surface of the magnetic yoke fixing structure 203 is flush with the first top surface 2021A of the first magnetic yoke 202 and the third top surface 2014 of the second fixing seat 2012. Preferably, the magnetic yoke fixing structure 203 is a ring structure, so as to facilitate disassembly and installation.

[0100] Step S4, sequentially install multiple connection support structures 210 on the magnetic yoke fixing seat 201, and fix them through fasteners, to obtain an assembly;

[0101] Step S5, turn over the assembly obtained in step S4 by 180°, sequentially set multiple coil assemblies 204 on the first magnetic yoke 202, and wire the coil assemblies 204 to realize electrical connection between the coil assemblies 204 and the circuit board 206;

[0102] Step S6, install the second magnetic yoke 207, so that the end of the first magnetic yoke 202 is inserted into the magnetic yoke mounting hole 2071 of the second magnetic yoke 207; and the end of the connection support structure 210 is inserted into the second magnetic yoke 207.

[0103] Step S7, install the fixing plate 208, and install fasteners to fix the fixing plate 208 with the second magnetic yoke 207 and the connection support structure 210; to obtain an assembly;

[0104] Step S8, debug the assembly obtained in step S7;

[0105] Step S9, place the debugged assembly into the motor housing 10; remove the magnetic yoke fixing structure 203;

[0106] Step S10, glue pouring.

[0107] In this embodiment, the magnet yoke fixing structure 203 is removed before the glue filling, and then the glue filling is performed. At this time, the magnet yoke fixing structure 203 is used as a tool for fixing the first magnet yoke 202, and can be repeatedly used for assembly of other motor stators. This assembly method can reduce the installation space occupied by the magnet yoke fixing structure 203, and is suitable for small or micro motors. The assembly method can ensure assembly and debugging of the motor stator outside the motor housing 10, and does not additionally increase the volume of the motor.

[0108] In this application, the terms "comprise", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the article or device comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such article or device. Without more limitations, the elements defined by the statement "comprise" do not exclude the presence of other identical elements in the article or device comprising the elements.

[0109] Although the preferred embodiments of the present application have been described, those skilled in the art can make further changes and modifications to the embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0110] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include these modifications and variations.

Claims

1. A magnetic levitation motor stator, characterized in that, It includes a magnetic yoke holder (201), a first magnetic yoke (202), a magnetic yoke fixing structure (203), a coil assembly (204), a sensor (205), a circuit board (206), a second magnetic yoke (207), a fixing plate (208), and a connecting support structure (210); The first magnetic yoke (202) includes a radially arranged first segment (2021) and a second segment (2022) extending axially from one end of the first segment (2021); the second segment (2022) is inserted into the magnetic yoke fixing seat (201), and its end extends into the magnetic yoke mounting hole (2071) of the second magnetic yoke (207); a first top surface (2021A) is formed on the top of the first magnetic yoke (202), and a second top surface (2021B) is formed by the inward recess of the periphery of the first top surface (2021A); The magnetic yoke fixing structure (203) covers the second top surface (2021B) and is connected to the magnetic yoke fixing seat (201); the circuit board (206) is disposed below the magnetic yoke fixing seat (201); the sensor (205) is disposed on the magnetic yoke fixing seat (201); The coil assembly (204) is sleeved on the second segment (2022) and located between the magnetic yoke fixing seat (201) and the second magnetic yoke (207); the fixing plate (208) is disposed at the bottom of the second magnetic yoke (207); one end of the connecting support structure (210) is inserted into the second magnetic yoke (207) and connected to the fixing plate (208), and the other end is connected to the magnetic yoke fixing seat (201).

2. The stator of the magnetic levitation motor according to claim 1, characterized in that, The magnetic yoke fixing structure (203) includes multiple magnetic yoke fixing units, each of which fixes a first magnetic yoke (202).

3. The stator of the magnetic levitation motor according to claim 2, characterized in that, The magnetic yoke fixing unit includes a fixing part (2032) and a mounting part (2031), with the mounting part (2031) connected to both ends of the fixing part (2032); the fixing part (2032) and the mounting part (2031) are integrally formed.

4. The stator of the magnetic levitation motor according to claim 3, characterized in that, The mounting part (2031) extends in the axial direction, and a snap-fit ​​groove (2033) is formed between the mounting part (2031) and the fixing part (2032); the connecting surface between the first top surface (2021A) and the second top surface (2021B) of the first magnetic yoke (202) engages with the snap-fit ​​groove (2033).

5. The stator of the magnetic levitation motor according to claim 1, characterized in that, The magnetic yoke fixing structure (203) is ring-shaped and can fix multiple first magnetic yokes (202) at the same time.

6. The stator of the magnetic levitation motor according to any one of claims 1 to 5, characterized in that, The magnetic yoke fixing structure (203) is made of non-magnetic material.

7. The stator of the magnetic levitation motor according to claim 1, characterized in that, The end face of the second segment (2022) of the first magnetic yoke (202) facing the axis is an arc surface (2021C).

8. The stator of the magnetic levitation motor according to claim 1, characterized in that, The magnetic yoke fixing seat (201) has a plurality of axially extending mounting slots (2013) formed on it, and the plurality of mounting slots (2013) are evenly distributed in the circumferential direction.

9. The stator of the magnetic levitation motor according to claim 8, characterized in that, The mounting channel (2013) is surrounded by a glue-filling channel (211) that extends in the same direction as and is connected to the mounting channel (2013).

10. The stator of the magnetic levitation motor according to claim 8, characterized in that, The magnetic yoke fixing seat (201) includes a first fixing seat (2011) and a second fixing seat (2012) disposed on the top surface of the first fixing seat (2011); the top of the second fixing seat (2012) is formed with a third top surface (2014), and the periphery of the third top surface (2014) is recessed to form a fourth top surface (2015). When the first magnetic yoke (202) is installed in the mounting through groove (2013), the third top surface (2014) is flush with the first top surface (2021A), and the fourth top surface (2015) is flush with the second top surface (2021B).

11. The stator of a magnetic levitation motor according to any one of claims 8 to 10, characterized in that, Between every two mounting slots (2013), the outer periphery of the second fixing seat (2012) is recessed in the radial direction to form a sensor mounting slot (2016); a sensor mounting hole (2017) extending in the radial direction and penetrating the second fixing seat (2012) is formed on the inner wall surface of the sensor mounting slot (2016).

12. The stator of the magnetic levitation motor according to claim 1, characterized in that, The second magnetic yoke (207) has a plurality of cut-off slots (2072) which are connected to the magnetic yoke mounting holes (2071).

13. The stator of the magnetic levitation motor according to claim 12, characterized in that, The cut-off slot (2072) is located on the side of the second magnetic yoke (207) away from the axis.

14. The stator of the magnetic levitation motor according to claim 1, characterized in that, A glue-filling groove (211) is provided around the magnetic yoke mounting hole (2071) and is connected to it in the same direction of extension.

15. The stator of the magnetic levitation motor according to claim 1, characterized in that, The coil assembly (204) includes a coil fixing sleeve (2041), a first coil (2042) and a second coil (2043); the first coil (2042) and the second coil (2043) are evenly wound on the coil fixing sleeve (2041).

16. The stator of the magnetic levitation motor according to claim 15, characterized in that, The coil fixing sleeve (2041) includes a hollow fixing sleeve body (2041A) and an annular coil partition (2041B); the annular coil partition (2041B) is disposed at both ends and the middle of the fixing sleeve body (2041A) to form a winding space for the first coil (2042) and a winding space for the second coil (2043).

17. The stator of the magnetic levitation motor according to claim 16, characterized in that, A potting groove (211) is provided around the inner hole of the coil fixing sleeve (2041) and is connected to it in the same direction as the inner hole.

18. A magnetic levitation motor, characterized in that, Includes a magnetic levitation motor stator (20) as described in any one of claims 1 to 17 and a motor housing (10), wherein the magnetic levitation motor stator (20) is disposed within the motor housing (10).

19. A method for assembling a stator of a magnetic levitation motor as described in any one of claims 1 to 17, characterized in that, The assembly method includes the following steps: Step S1: Install the sensor (205) and circuit board (206) on the magnetic yoke fixing base (201); Step S2: Insert the first magnetic yoke (202) into the magnetic yoke fixing seat (201); Step S3: Install the magnetic yoke fixing structure (203) to press it against the second top surface (2021B) of the first magnetic yoke (202); Step S4: Install the connecting support structure (210) on the magnetic yoke fixing seat (201); Step S5: Flip the assembly obtained in step S4 by 180°, put the coil assembly (204) on the first magnetic yoke (202), and wire the coil assembly (204); Step S6: Install the second magnetic yoke (207) so that the end of the first magnetic yoke (202) is inserted into the magnetic yoke mounting hole (2071) of the second magnetic yoke (207); Step S7, Install the fixing plate (208); Step S8: Debug the assembly obtained in step S7; Step S9: Place the assembled parts that have been debugged into the housing and apply glue.

20. A method for assembling a stator of a magnetic levitation motor as described in any one of claims 1 to 17, characterized in that, The assembly method includes the following steps: Step S1: Install the sensor (205) and circuit board (206) on the magnetic yoke fixing base (201); Step S2: Insert the first magnetic yoke (202) into the magnetic yoke fixing seat (201); Step S3: Install the magnetic yoke fixing structure (203) to press it against the second top surface (2021B) of the first magnetic yoke (202); Step S4: Install the connecting support structure (210) on the magnetic yoke fixing seat (201); Step S5: Flip the assembly obtained in step S4 by 180°, put the coil assembly (204) on the first magnetic yoke (202), and wire the coil assembly (204); Step S6: Install the second magnetic yoke (207) so that the end of the first magnetic yoke (202) is inserted into the magnetic yoke mounting hole (2071) of the second magnetic yoke (207); Step S7, Install the fixing plate (208); Step S8: Debug the assembly obtained in step S7; Step S9: Place the assembled parts that have been debugged into the motor housing (10) and remove the magnetic yoke fixing structure (203). Step S10: Perform glue application.

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