Conjugate bilateral magnetic field linear induction motor and assembling method thereof

Abstract

The application relates to a conjugate double-sided magnetic field linear induction motor and an assembling method thereof. The conjugate double-sided magnetic field linear induction motor comprises conjugate winding primaries and composite secondaries, and a group of composite secondaries are arranged on opposite sides of the conjugate winding primaries respectively. The composite secondary comprises a back iron and a squirrel cage embedded in the back iron, and the squirrel cages of the two groups of composite secondaries are oppositely arranged. According to the conjugate double-sided magnetic field linear induction motor, a group of composite secondaries are arranged on opposite sides of the conjugate winding primaries respectively, and the multi-phase conjugate winding primary generates a double-sided conjugate symmetrical air gap magnetic field when the motor is powered and operated, the air gap magnetic field interacts with the double-sided composite secondary to generate electromagnetic force, and the air gap magnetic field utilization rate and the thrust density are higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of linear motor, in particular to a conjugate double-sided magnetic field linear induction motor and an assembling method thereof. BACKGROUND

[0002] The existing linear induction motor has problems of low thrust density and efficiency, unbalanced primary net normal force, etc., and can only be optimized for specific electromagnetic requirements, which is difficult to simultaneously improve the utilization rate of air gap magnetic flux, thrust density and efficiency, and solve the problem of mover net normal force imbalance caused by non-strict symmetry of the magnetic circuit. In terms of motor body, the existing linear induction motor often uses distributed winding to adjust the magnetic field harmonic component to improve the thrust stability, resulting in complex motor system structure and difficult production and processing. The longer winding end further increases the primary copper loss, making it difficult to improve the efficiency of the motor system. In terms of motor thermal management, the traditional linear induction motor structure is redundant and the heat conduction path is long, which does not allow higher continuous current density and power output. SUMMARY

[0003] In order to solve the problems of low thrust density, low efficiency and unbalanced primary net normal force of the existing linear motor system, the present application provides a conjugate double-sided magnetic field linear induction motor and an assembling method thereof to meet the requirements of different thrust, speed level and adjustable running distance in multiple fields.

[0004] The technical scheme for solving the above technical problems is as follows: the present application provides a conjugate double-sided magnetic field linear induction motor, which comprises a conjugate winding primary and a composite secondary, and a group of composite secondaries are arranged on the opposite sides of the conjugate winding primary; the composite secondary comprises a back iron and a squirrel cage embedded in the back iron, and the squirrel cages of the two groups of composite secondaries are oppositely arranged.

[0005] The conjugate double-sided magnetic field linear induction motor of the present application has the following advantages: by arranging a group of composite secondaries on the opposite sides of the conjugate winding primary, the multi-phase conjugate winding primary generates a double-sided conjugate symmetric air gap magnetic field when the motor is energized and operated, which interacts with the double-sided composite secondary to generate electromagnetic force, and the utilization rate of air gap magnetic field and the thrust density are higher.

[0006] On the basis of the above technical scheme, the present application can be further improved as follows.

[0007] Further, the back iron is provided with a plurality of first assembly grooves on the side surface opposite to the conjugate winding primary, the first assembly grooves are arranged in sequence and spaced apart along the axis direction parallel to the conjugate winding primary, one squirrel cage is embedded in each first assembly groove, one end of the plurality of squirrel cages is connected and fixed with the first lead strip on one side of the back iron, and the other end of the plurality of squirrel cages is connected and fixed with the second lead strip on the other side of the back iron.

[0008] The beneficial effect of the above further scheme is that: by arranging a plurality of first assembly slots on the side of the back iron opposite to the primary of the conjugate winding, and arranging a squirrel cage bar in each first assembly slot and connecting and fixing the squirrel cage bars by the first guide bars, the structure is compact, the materials of the squirrel cage bars, the first guide bars and the second guide bars are the same, which can be copper or aluminum, and the back iron is made of iron, so that when the composite secondary is powered, induced current closed circulation can be formed in the first guide bars, the second guide bars and the squirrel cage bars.

[0009] Further, the primary of the conjugate winding comprises a primary core and a conjugate winding, and the conjugate winding is wound on the primary core and is isolated from the primary core by an insulation layer.

[0010] Further, the primary core is provided with a plurality of second assembly slots penetrating through both ends on the two sides opposite to the composite secondary, the plurality of second assembly slots on one side of the primary core are arranged in sequence and spaced along the axial direction of the primary of the conjugate winding, the second assembly slots on the two sides of the primary core are arranged one by one in correspondence, and a plurality of winding coils of the conjugate winding are wound in the two corresponding second assembly slots.

[0011] The beneficial effect of the above further scheme is that: by arranging the second assembly slots, the winding coils of the conjugate winding can be effectively wound and positioned.

[0012] Further, the primary core comprises a plurality of primary silicon steel laminations arranged in stack, a first primary pressing plate and a second primary pressing plate, the top of the plurality of primary silicon steel laminations is provided with the first primary pressing plate, the bottom of the plurality of primary silicon steel laminations is provided with the second primary pressing plate, the first primary pressing plate, the second primary pressing plate and the primary silicon steel laminations are connected and fixed by connecting pieces; and the second assembly slots are arranged on the primary silicon steel laminations, the first primary pressing plate and the second primary pressing plate.

[0013] The beneficial effect of the above further scheme is that: the primary core adopts the structure of a plurality of primary silicon steel laminations, a first primary pressing plate and a second primary pressing plate arranged in stack, which has the advantages of compact structure, convenient production and processing, high flexibility and the like.

[0014] Further, the primary core further comprises a first cover plate and a second cover plate, the first cover plate is located on the side of the first primary pressing plate away from the primary silicon steel laminations, and the second cover plate is located on the side of the second primary pressing plate away from the primary silicon steel laminations; a first limiting groove is arranged on the first cover plate, a second limiting groove is arranged on the second cover plate, the first limiting groove, the second assembly slots on the two sides of the primary core and the second limiting groove are arranged one by one in correspondence; and the winding coils of the conjugate winding are wound in the corresponding group of the first limiting groove, the second assembly slots on the two sides of the primary core and the second limiting groove.

[0015] The beneficial effect of the above further scheme is that by setting the first cover plate and the second cover plate and setting the limiting groove on the cover plate, the winding coil of the conjugate winding can be effectively limited.

[0016] Further, a limiting groove is formed on each of the two inner side walls at the slot opening of the second assembly slot, the winding coil of the conjugate winding is located in the second assembly slot and does not exceed the limiting groove, and a limiting block for limiting the winding coil is arranged in the limiting groove.

[0017] The beneficial effect of the above further scheme is that by setting the limiting groove and the limiting block, the winding coil can be effectively positioned.

[0018] Further, a plurality of composite secondaries are respectively arranged on opposite sides of the conjugate winding primary, the conjugate winding primary is set as one or a plurality of sequentially connected ones in the axial direction, and the two ends of the conjugate winding primary in the axial direction do not exceed the two ends of the composite secondary or the two ends of the conjugate winding primary in the axial direction respectively exceed the two ends of the composite secondary by a preset length.

[0019] The beneficial effect of the above further scheme is that by setting one composite secondary and a plurality of conjugate winding primaries, the two ends of the conjugate winding primary in the axial direction respectively exceed the two ends of the composite secondary by a preset length, a long-primary short-secondary structure can be formed, and a plurality of groups of conjugate winding primaries can be connected in series through the hanging mechanism, and the thrust output level covers a wide range.

[0020] Further, a plurality of composite secondaries are respectively arranged on opposite sides of the conjugate winding primary, the conjugate winding primary is set as one or a plurality of sequentially connected ones in the axial direction, and the plurality of composite secondaries on the same side of the conjugate winding primary are sequentially connected and fixed in the direction parallel to the axis of the conjugate winding primary.

[0021] The beneficial effect of the above further scheme is that by setting a plurality of composite secondaries on opposite sides of the conjugate winding primary, in the long-primary short-secondary structure, a plurality of groups of composite secondaries can be connected in series through the hanging mechanism, and the thrust output level, the running speed and the stroke cover a wide range, and a plurality of groups of conjugate winding primaries can also be connected in series through the hanging mechanism, and the thrust output level covers a wide range.

[0022] The application further provides an assembling method of the conjugate double-sided magnetic field linear induction motor, comprising the following steps: milling the first through hole in the same position on the primary silicon steel sheet, the first primary pressing plate and the second primary pressing plate, passing the connecting piece through the first through hole on the second primary pressing plate and fixing to form the primary silicon steel sheet mounting bracket with the connecting piece, passing the multiple primary silicon steel sheets with the first through hole through the connecting piece in sequence, and finally passing the first through hole of the first primary pressing plate through the connecting piece, and fixing the first primary pressing plate, the multiple primary silicon steel sheets and the second primary pressing plate into the integral structure of the primary core by the connecting piece; placing the insulating layer in the second assembly groove, placing the winding coil of the conjugate winding on the insulating layer of the second assembly groove, and wrapping the winding coil by the insulating layer to isolate the winding coil from the groove wall of the second assembly groove; and arranging one composite secondary on each side of the conjugate winding primary with the second assembly groove in sequence, so that the squirrel cage bars of the composite secondary are arranged opposite to the conjugate winding primary.

[0023] The assembling method of the application has simple process, is convenient for forming, and has compact structure. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 FIG. 1 is a structural principle schematic diagram of the conjugate double-sided magnetic field linear induction motor of the application;

[0025] Figure 2 FIG. 2 is a structural schematic diagram of one embodiment of the conjugate double-sided magnetic field linear induction motor of the application;

[0026] Figure 3 FIG. 3 is a structural schematic diagram of another embodiment of the conjugate double-sided magnetic field linear induction motor of the application;

[0027] Figure 4 FIG. 4 is a structural schematic diagram of a third embodiment of the conjugate double-sided magnetic field linear induction motor of the application.

[0028] In the drawings, the components represented by the respective reference numerals are listed as follows:

[0029] 1, conjugate winding primary; 11, primary core; 12, second assembly groove; 13, winding coil; 14, first through hole; 15, limiting block;

[0030] 2, composite secondary; 21, back iron; 22, first assembly groove; 23, squirrel cage bar; 24, second through hole; 3, machine shell. DETAILED DESCRIPTION

[0031] The principles and characteristics of the application are described below, and the examples are only used to explain the application, and are not used to limit the scope of the application.

[0032] Example 1

[0033] As Figures 1-4As shown, a conjugate double-sided magnetic field linear induction motor of this embodiment includes a conjugate winding primary 1 and a composite secondary 2. A set of composite secondary 2 is provided on each of the opposite sides of the conjugate winding primary 1 at intervals. The composite secondary 2 includes a back iron 21 and a squirrel cage bar 23 embedded in the back iron 21. The squirrel cage bars 23 of the two sets of composite secondary 2 are arranged opposite to each other.

[0034] In this embodiment, both the primary winding 1 and the composite secondary winding 2 of the conjugate winding can adopt a modular design that is easy to assemble and install.

[0035] In this embodiment, the conjugate primary winding 1 and the composite secondary winding 2 can be disposed within the housing 3, such as... Figure 4 As shown.

[0036] In this embodiment, a multiphase alternating current is applied to the primary winding of the conjugate winding to generate, as follows: Figure 1 The double-sided symmetrical air-gap magnetic field, shown by the dashed line, forms a closed magnetic circuit with the double-sided stator magnetic back iron (composite secondary 2) and the primary silicon steel laminations in the conjugate winding primary 1. This couples the primary winding magnetic field into a conjugate symmetrical field. The conjugate symmetrical traveling wave magnetic field induces closed eddy currents in the squirrel cage bars on both sides. These closed eddy currents are subjected to Lorentz force in the conjugate winding traveling wave magnetic field, thus generating thrust and providing horizontal power for the load. Simultaneously, the closed magnetic flux path improves the utilization rate of the air-gap magnetic flux density, achieving a thrust density 1.8 to 2.2 times that of a traditional single-sided motor. The normal attraction of the conjugate symmetrical magnetic field on the primary cancels each other out, resulting in a net normal force approaching zero. The conjugate winding reduces the end effect, lowers eddy current losses and copper losses, and improves system efficiency by 12% to 18% under full load conditions. The conjugate winding structure further optimizes the uniformity of magnetic field distribution, making the motor system structure more compact. Better heat dissipation and a more uniform temperature distribution reduce system thermal stress.

[0037] This embodiment of a conjugate double-sided magnetic field linear induction motor provides a set of composite secondary windings 2 at intervals on both sides of the primary winding 1 of the conjugate winding. Under special operating conditions, the composite secondary winding on one side can also be eliminated, and a single-sided structure can be used for operation.

[0038] This embodiment of a conjugate double-sided magnetic field linear induction motor, by setting a set of composite secondary on each side of the primary of the conjugate winding, when the motor is energized, the multiphase conjugate winding primary will generate a double-sided conjugate symmetrical air gap magnetic field, which interacts with the double-sided composite secondary to generate electromagnetic force, resulting in higher air gap magnetic field utilization and thrust density.

[0039] The linear induction motor of the conjugate double-sided magnetic field has the advantages of compact structure, balanced primary net normal force, convenient production and processing, high flexibility, and the like. In terms of working characteristics, the primary structure of the conjugate winding is more compact, the thickness of the core yoke of the composite secondary is smaller, and the magnetic field utilization rate is higher; the conjugate double-sided magnetic field design, in combination with the intelligent control algorithm and the harmonic suppression technology, significantly improves the thrust density, the energy efficiency ratio and the operation stability of the linear induction motor; the double-sided conjugate symmetric magnetic field cooperates with the symmetric magnetic circuit design, and the primary normal force is more balanced; in terms of processing and manufacturing, the cage bars of the composite secondary are directly inserted or cast, the conjugate winding primary is directly wound, and the modular design greatly improves the production efficiency.

[0040] The linear induction motor of the conjugate double-sided magnetic field can be applied to various load launching and recovery, impact collision, low-altitude economy and other high-power density occasions in military and civilian fields.

[0041] Embodiment 2

[0042] Based on the embodiment 1, the embodiment provides a preferred scheme for the assembly mode of the back iron 21 and the cage bar 23. As shown in Figures 1-4 the back iron 21 is provided with a plurality of first assembly grooves 22 on the side surface opposite to the conjugate winding primary 1, the plurality of first assembly grooves 22 are sequentially and spaced arranged along the axial direction parallel to the conjugate winding primary 1, one cage bar 23 is embedded in each first assembly groove 22, one end of the plurality of cage bars 23 is connected and fixed with the first bar of one side of the back iron 21, and the other end of the plurality of cage bars 23 is connected and fixed with the second bar of the other side of the back iron 21. The first assembly groove 22 can limit and fix the cage bar 23. By arranging a plurality of first assembly grooves on the side surface of the back iron opposite to the conjugate winding primary, each first assembly groove is provided with a cage bar, and the cage bar is connected and fixed through the bar, the structure is compact, the materials of the cage bar, the first bar and the second bar are the same, which can be copper or aluminum material, the back iron is made of iron material, so that when the composite secondary is powered, the induced current closed return flow can be formed in the first bar, the second bar and the cage bar.

[0043] Further, the extension direction of the first assembly groove 22 is perpendicular to the axis of the conjugate winding primary 1.

[0044] In the embodiment, the second through hole 24 can be formed on the first bar, the second bar and the back iron 21, the second through holes 24 on the first bar, the second bar and the back iron 21 are arranged one by one, and a group of corresponding arranged second through holes 24 are fixedly connected by penetrating a screw rod.

[0045] In order to reduce eddy current losses and improve motor efficiency, the secondary back iron can be made of stacked silicon steel sheets. The stacked silicon steel sheets can also have second through holes 24. After stacking, the first guide bar and the second guide bar are respectively set at the top and bottom of the stack, and the screws are used to fix and connect them by passing through a set of corresponding second through holes 24.

[0046] Specifically, in this embodiment, the first assembly slot 22 can be a rectangular open slot or a dovetail slot. The first assembly slot 22 is preferably a dovetail slot, and the shape of the squirrel cage bar 23 is adapted to the shape of the dovetail slot. The conductivity of the squirrel cage bar 23 is stronger than that of the back iron 21; the squirrel cage bar 23 extends along a direction perpendicular to the axial direction of the primary winding 1 of the conjugate winding.

[0047] In this embodiment, the two ends of the cage bar 23 can be flush with the two sides of the back iron 21 or slightly extend beyond the sides of the back iron 21, in order to connect the two guide bars and form an overall circuit.

[0048] Example 3

[0049] Based on Embodiment 1 or Embodiment 2, this embodiment provides a preferred embodiment of the primary conjugate winding. The primary conjugate winding 1 includes a primary iron core 11 and a conjugate winding, wherein the conjugate winding is wound on the primary iron core 11 and isolated from the primary iron core 11 by an insulating layer.

[0050] like Figures 1-4 As shown, in a preferred embodiment, the primary core 11 has multiple through-hole second mounting slots 12 on both sides facing the composite secondary winding 2. The multiple second mounting slots 12 on one side of the primary core 11 are arranged sequentially at intervals along the axial direction of the primary conjugate winding 1. The second mounting slots 12 on both sides of the primary core 11 are arranged in a one-to-one correspondence, and multiple conjugate winding coils 13 are wound within two corresponding second mounting slots 12. By providing the second mounting slots, the winding coils of the conjugate windings can be effectively wound and positioned.

[0051] Specifically, the extension direction of the second mounting slot 12 is perpendicular to the axis of the primary core 11. Slot insulation can be placed first in the second mounting slot, and then the winding coil can be placed on the slot insulation. The slot insulation wraps around the winding coil to form an insulating layer, preventing the winding coil from directly contacting the primary core 11. The winding coil is formed by winding several turns of multi-strand copper flat wire.

[0052] In one specific embodiment of the present embodiment, the primary core 11 comprises a plurality of primary silicon steel sheets arranged in a stack, a first primary pressing plate and a second primary pressing plate, the top of the plurality of primary silicon steel sheets is provided with the first primary pressing plate, the bottom of the plurality of primary silicon steel sheets is provided with the second primary pressing plate, the first primary pressing plate, the second primary pressing plate and the primary silicon steel sheets are connected and fixed by connecting pieces; the second assembly groove 12 is formed on the primary silicon steel sheets, the first primary pressing plate and the second primary pressing plate. The primary core adopts a structure formed by stacking a plurality of primary silicon steel sheets, a first primary pressing plate and a second primary pressing plate, which has the advantages of compact structure, convenient production and processing, high flexibility and the like.

[0053] Preferably, the primary core 11 of the present embodiment further comprises a first cover plate and a second cover plate, the first cover plate is located on the side of the first primary pressing plate away from the primary silicon steel sheets, and the second cover plate is located on the side of the second primary pressing plate away from the primary silicon steel sheets; a first limiting groove is formed on the first cover plate, and a second limiting groove is formed on the second cover plate, the first limiting groove, the second assembly groove 12 on both sides of the primary core 11 and the second limiting groove are arranged one-to-one in correspondence, and the winding coil 13 of the conjugate winding is wound in the corresponding set of first limiting groove, second assembly groove 12 on both sides of the primary core 11 and second limiting groove. The width of the first cover plate and the second cover plate does not exceed the width of the first primary pressing plate and the second primary pressing plate, and the length of the first cover plate and the second cover plate does not exceed the length of the first primary pressing plate and the second primary pressing plate; by arranging the first cover plate and the second cover plate and arranging the limiting grooves on the cover plates, the winding coil of the conjugate winding can be effectively limited, and the winding coil can be guided and fixed when winding the winding coil. The groove bottom of the first limiting groove and the second limiting groove can be rounded at the coil bending position, which provides guidance and end support for the winding of the conjugate winding.

[0054] Specifically, in this embodiment, the connector can be a screw, which, in conjunction with a nut, achieves locking and fixing between the primary silicon steel laminations, the first cover plate, the second cover plate, the first primary pressure plate, and the second primary pressure plate. Each of the primary silicon steel laminations, the first cover plate, the second cover plate, the first primary pressure plate, and the second primary pressure plate has multiple first through holes 14. After being stacked into the primary core 11, the first through holes 14 of the primary silicon steel laminations, the first cover plate, the second cover plate, the first primary pressure plate, and the second primary pressure plate correspond one-to-one. A screw is inserted through a corresponding set of first through holes 14. Two or more sets of first through holes 14 can be provided, which facilitates stable assembly between the various components of the primary core 11. Each set of first through holes 14 is connected with a screw. The number of first through holes 14 can be adjusted according to the actual length of the primary silicon steel laminations. The length of the screw does not exceed the sum of the stack height of the primary silicon steel laminations and the thickness of the two primary pressure plates. The first and second cover plates are not connected and fixed by screws. Instead, they are positioned by a positioning structure and the corresponding primary pressure plate, and then fixed by winding a coil. The positioning structure can be a combination of positioning grooves and positioning protrusions.

[0055] In this embodiment, the primary silicon steel laminations, the first primary pressure plate, and the second primary pressure plate have the same outline. The number and position of the assembly slots on both sides of the primary silicon steel laminations, the first primary pressure plate, and the second primary pressure plate are the same, and they are combined to form the second assembly slot.

[0056] In this embodiment, the second assembly slot 12 is preferably a rectangular opening slot. The first and second cover plates are preferably made of insulating and non-magnetic materials; the primary silicon steel laminations, the first primary pressure plate, and the second primary pressure plate are all made of metal.

[0057] In this embodiment, the conjugate winding coil 13 is directly wound around the primary core. The two effective sides of the winding coil 13 are placed in the second mounting slots 12 on both sides to generate a bilaterally conjugate symmetrical sinusoidal air gap magnetic field. The length of the primary conjugate winding in this embodiment can be adjusted according to actual needs.

[0058] Example 4

[0059] Based on Example 3, this example provides a preferred configuration for the conjugate winding. For example... Figure 1 As shown, limiting slots are respectively formed on the two inner sidewalls of the second assembly slot 12. The winding coil of the conjugate winding is located within the second assembly slot 12 and is arranged not beyond the limiting slots. A limiting block 15 is provided in the limiting slot to limit the winding coil. By setting the limiting slots and limiting blocks, the winding coil can be effectively positioned. The limiting block 15 can be made of metal.

[0060] Further preferably, the limiting grooves of the embodiment are triangular structures, the groove opening areas of the two limiting grooves and the second assembly groove 12 jointly form a wedge-shaped groove structure, and the limiting block 15 is in the shape of a wedge-shaped block that is adapted to the wedge-shaped groove, and the wedge-shaped block is adapted to be installed in the wedge-shaped groove to limit the winding coil in the second assembly groove 12.

[0061] Embodiment 5

[0062] On the basis of any one of Embodiments 1 to 4, the present embodiment provides an alternative scheme of the motor. As shown in Figure 1 and Figure 3 two composite secondaries 2 are arranged on opposite sides of the conjugate winding primary 1, the conjugate winding primary 1 is provided as one or a plurality of axially connected modules, and the two ends of the conjugate winding primary 1 in the axial direction do not exceed the two ends of the composite secondary 2 or the two ends of the conjugate winding primary 1 respectively exceed the two ends of the composite secondary 2 by a predetermined length. By providing one composite secondary and a plurality of conjugate winding primaries, the conjugate winding primary 1 can be designed in a modular unit splicing manner, and the two ends of the conjugate winding primary 1 in the axial direction can respectively exceed the two ends of the composite secondary 2 by a predetermined length according to actual needs. The plurality of conjugate winding primaries 1 can be connected in series through a hanging mechanism, and the output thrust level coverage is wide. Through the splicing or series connection of the modular units, the requirements of different acceleration strokes, speeds and output thrust levels can be met, and the application potential in the green energy field is expanded.

[0063] Embodiment 6

[0064] On the basis of any one of Embodiments 1 to 4, the present embodiment provides an alternative scheme of the motor. As shown in Figure 2 two composite secondaries 2 are arranged on opposite sides of the conjugate winding primary 1, the conjugate winding primary 1 is provided as one, and the plurality of composite secondaries 2 on the same side of the conjugate winding primary 1 are connected and fixed in sequence along the axial direction parallel to the conjugate winding primary 1. A plurality of composite secondaries 2 can be arranged on both sides of the conjugate winding primary 1, and the plurality of composite secondaries 2 can also be designed in a modular unit splicing structure, for example, can be connected in series through a hanging mechanism, and the thrust output level, running speed and stroke coverage are wide. Through the splicing or series connection of the modular units, the requirements of different acceleration strokes, speeds and output thrust levels can be met, and the application potential in the green energy field is expanded.

[0065] Embodiment 7

[0066] On the basis of any one of Embodiments 1 to 4, the present embodiment provides an alternative scheme of the motor. As shown in Figure 4As shown, a plurality of composite secondaries 2 are arranged at intervals on opposite sides of the conjugate winding primary 1, and the conjugate winding primary 1 is arranged as a plurality of units connected in sequence along the axial direction. The plurality of composite secondaries 2 on the same side of the conjugate winding primary 1 are connected and fixed in sequence along the axial direction of the conjugate winding primary 1. A plurality of composite secondaries 2 can be arranged on both sides of the conjugate winding primary 1, and the plurality of composite secondaries 2 can also be designed in a modular unit splicing structure, for example, can be connected in series through a hanging mechanism, and has wide thrust output level, running speed and stroke coverage. A plurality of conjugate winding primaries can also be connected in series through a hanging mechanism, and has wide thrust output level coverage. Through the splicing or series connection of the modular units, the requirements of different acceleration strokes, speeds and output thrust levels can be met, and the application potential of the conjugate winding primary in the green energy field is expanded.

[0067] Embodiment 8

[0068] The embodiment also provides an assembly method of the conjugate double-sided magnetic field linear induction motor in any one of embodiments 3 to 5, comprising the following steps: milling first through holes 14 at the same positions on the primary silicon steel laminations, the first primary pressing plate and the second primary pressing plate, passing the connecting pieces through the first through holes 14 on the second primary pressing plate and fixing to form a primary silicon steel lamination mounting bracket with connecting pieces, sequentially passing a plurality of primary silicon steel laminations with first through holes 14 through the connecting pieces, and finally passing the first through holes 14 of the first primary pressing plate through the connecting pieces, and fixing the first primary pressing plate, the plurality of primary silicon steel laminations and the second primary pressing plate into an integral structure of the primary core 11 by the connecting pieces; placing an insulation layer (slot insulation) in the second assembly groove 12, placing the winding coils of the conjugate winding on the insulation layer of the second assembly groove 12, and wrapping the winding coils with the insulation layer to isolate them from the groove wall of the second assembly groove 12; arranging one composite secondary 2 at intervals on both sides of the conjugate winding primary 1 provided with the second assembly groove 12, so that the squirrel cage bars 23 of the composite secondary 2 are arranged opposite to the conjugate winding primary 1.

[0069] In the assembly process of the composite secondary 2, the squirrel cage bars 23 can be sequentially inserted into the first assembly groove 22 of the back iron 21, and then the first and second guide bars are connected and locked with the back iron 21 by the screw rod, and the connection and locking method is the same as that of the conjugate winding primary.

[0070] The assembly method of the embodiment is simple in process, convenient to make and compact in structure.

[0071] In the description of the application, it is necessary to understand that the terms "top", "bottom", "axial" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0072] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0073] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0074] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0075] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0076] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and that variations, modifications, substitutions and changes can be made by those skilled in the art without departing from the scope of the present application.

Claims

1. A linear induction motor of the conjugate type with bilateral magnetic field, characterized in that, The primary of the conjugate winding is provided with a plurality of second assembly slots penetrating through two ends of the primary core, and a plurality of winding coils of the conjugate winding are arranged in the second assembly slots. The primary core comprises a plurality of primary silicon steel laminations arranged in a stack, a first primary pressing plate and a second primary pressing plate, the top of the primary silicon steel laminations is provided with the first primary pressing plate, the bottom of the primary silicon steel laminations is provided with the second primary pressing plate, the first primary pressing plate, the second primary pressing plate and the primary silicon steel laminations are connected and fixed by a connecting piece, and the second assembly slots are formed in the primary silicon steel laminations, the first primary pressing plate and the second primary pressing plate. The primary core further comprises a first cover plate and a second cover plate, the first cover plate is located on a side of the first primary pressing plate away from the primary silicon steel laminations, and the second cover plate is located on a side of the second primary pressing plate away from the primary silicon steel laminations, a first limiting groove is formed in the first cover plate, a second limiting groove is formed in the second cover plate, the first limiting groove, the second assembly slots on both sides of the primary core and the second limiting groove are arranged one by one, and the winding coils of the conjugate winding are arranged in the corresponding first limiting groove, the second assembly slots on both sides of the primary core and the second limiting groove. The second assembly slots are provided with limiting grooves on two inner side walls of the slot opening, the winding coils of the conjugate winding are arranged in the second assembly slots and do not exceed the limiting grooves, the limiting grooves are provided with limiting blocks for limiting the winding coils, the limiting grooves are triangular structures, the slot opening region of the two limiting grooves and the second assembly slots forms a wedge-shaped groove structure, the limiting blocks are wedge-shaped blocks matched with the wedge-shaped groove structure, and the wedge-shaped blocks are matched and arranged in the wedge-shaped groove structure to limit the winding coils in the second assembly slots. The back iron is provided with a plurality of first assembly slots on a side of the primary of the conjugate winding, the first assembly slots are arranged in a stack along an axial direction of the primary of the conjugate winding, one end of each of the first assembly slots is embedded with one of the squirrel cages, one end of the plurality of squirrel cages is connected and fixed with a first bar on one side of the back iron, and the other end of the plurality of squirrel cages is connected and fixed with a second bar on the other side of the back iron.

2. The conjugate double-sided field linear induction motor according to claim 1, characterized in that, The primary of the conjugate winding is provided with a plurality of second assembly slots penetrating through two ends of the primary core, and a plurality of winding coils of the conjugate winding are arranged in the second assembly slots.

3. The linear induction motor with conjugated bilateral magnetic field according to claim 1 or 2, characterized in that, The primary of the conjugate winding is provided with a plurality of second assembly slots penetrating through two ends of the primary core, and a plurality of winding coils of the conjugate winding are arranged in the second assembly slots.

4. The linear induction motor with conjugated bilateral magnetic field according to claim 1 or 2, characterized in that, The opposite sides of the conjugate winding primary are respectively provided with a plurality of composite secondaries, the conjugate winding primary is provided as one or a plurality of axially connected ones, and the plurality of composite secondaries on the same side of the conjugate winding primary are sequentially connected and fixed along the axial direction parallel to the axis of the conjugate winding primary.

5. A method of assembling the conjugate bilateral field linear induction motor according to any one of claims 1 to 4, characterized in that, The method comprises the following steps: milling first through holes in the same position on the primary silicon steel laminations, the first primary pressing plate and the second primary pressing plate, passing a connecting piece through the first through holes on the second primary pressing plate and fixing the primary silicon steel lamination mounting bracket with the connecting piece, sequentially passing a plurality of primary silicon steel laminations with the first through holes through the connecting piece, and finally passing the first through holes of the first primary pressing plate through the connecting piece, and fixing the first primary pressing plate, the plurality of primary silicon steel laminations and the second primary pressing plate into an integral primary core structure by using the connecting piece; placing an insulation layer in the second assembly groove, placing the winding coils of the conjugate winding on the insulation layer of the second assembly groove, and wrapping the winding coils with the insulation layer to isolate them from the groove wall of the second assembly groove; and arranging one composite secondary on each side of the conjugate winding primary with the second assembly groove arranged thereon, so that the mouse cage bars of the composite secondary are arranged opposite to the conjugate winding primary.

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