Conjugated bilateral magnetic field linear induction motor and assembling method thereof

Abstract

The invention relates to a conjugate type bilateral magnetic field linear induction motor and an assembling method thereof, the conjugate type bilateral magnetic field linear induction motor comprises a conjugate winding primary and composite secondary, and the two opposite sides of the conjugate winding primary are each provided with a set of composite secondary at intervals; each composite secondary comprises back iron and squirrel cage strips embedded in the back iron, and the squirrel cage strips of the two composite secondary bodies are oppositely arranged. According to the conjugate type bilateral magnetic field linear induction motor, the two opposite sides of the conjugate winding primary are each provided with a set of composite secondary, when the motor is powered on and runs, the multiphase conjugate winding primary generates a bilateral conjugate symmetrical air gap magnetic field, and the bilateral conjugate symmetrical air gap magnetic field interacts with the bilateral 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 invention relates to the technical field related to linear motors, and in particular to a conjugate double-sided magnetic field linear induction motor and an assembly method thereof. Background Art

[0002] Existing linear induction motors suffer from problems such as low thrust density and efficiency, and imbalanced primary net normal force. They can often only carry out specific electromagnetic optimizations tailored to a particular engineering requirement, making it difficult to simultaneously improve air gap magnetic flux utilization, thrust density, and efficiency while also resolving the imbalanced net normal force of the rotor caused by the non-strict symmetry of the magnetic circuit. Regarding the motor itself, existing linear induction motors often use distributed windings to adjust the harmonic components of the magnetic field to improve thrust stability, resulting in a complex motor system structure and increased difficulty in production and processing. The longer winding ends increase primary copper loss, making it more difficult to improve the efficiency of the motor system. Regarding motor thermal management, traditional linear induction motors have a large structural redundancy and a long heat conduction path, which do not allow for higher continuous current density and power output. Summary of the Invention

[0003] In order to solve the problems of low thrust density, low efficiency and unbalanced primary net normal force in existing linear motor systems, the present invention provides a conjugate double-field linear induction motor and an assembly method thereof to meet the requirements of different thrust, speed levels and adjustable operating strokes in multiple fields.

[0004] The technical solution of the present invention to solve the above technical problems is as follows: The present invention provides a conjugate double-field linear induction motor, including a conjugate winding primary and a composite secondary, wherein a group of composite secondary is arranged at intervals on each opposite side of the conjugate winding primary; the composite secondary includes a back iron and squirrel cage bars embedded in the back iron, and the squirrel cage bars of the two groups of the composite secondary are arranged opposite to each other.

[0005] The beneficial effects of the present invention are as follows: a conjugated double-sided magnetic field linear induction motor of the present invention, by arranging a group of composite secondaries on opposite sides of the conjugated winding primary, when the motor is energized and running, the multi-phase conjugated winding primary will generate a bilateral conjugated symmetrical air gap magnetic field, which interacts with the bilateral composite secondary to generate electromagnetic force, and the air gap magnetic field utilization rate and thrust density are higher.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, a plurality of first assembly grooves are provided on a side of the back iron facing the primary of the conjugate winding, and the plurality of first assembly grooves are arranged in sequence and spaced apart along an axial direction parallel to the primary of the conjugate winding. A squirrel cage bar is embedded in each of the first assembly grooves, and one end of the plurality of squirrel cage bars is connected and fixed to the first conductor bar on one side of the back iron, and the other end of the plurality of squirrel cage bars is connected and fixed to the second conductor bar on the other side of the back iron.

[0008] The beneficial effect of adopting the above-mentioned further solution is as follows: by providing a plurality of first assembly grooves on a side of the back iron facing the primary of the conjugate winding, a squirrel cage bar is provided in each first assembly groove, and the squirrel cage bars are connected and fixed by the conductor bars, resulting in a compact structure. The squirrel cage bars, the first conductor bars, and the second conductor bars are made of the same material, which can be copper or aluminum, and the back iron is made of iron. In this way, when the composite secondary is energized, a closed reflux of induced current can be formed in the first conductor bars, the second conductor bars, and the squirrel cage bars.

[0009] Furthermore, the conjugate winding primary includes a primary core and a conjugate winding, and the conjugate winding is wound on the primary core and isolated from the primary core by an insulating layer.

[0010] Furthermore, a plurality of second assembly grooves with two ends passing therethrough are respectively provided on both sides of the primary iron core facing the composite secondary. The plurality of second assembly grooves on one side of the primary iron core are arranged in sequence along the axial direction of the primary of the conjugate winding. The second assembly grooves on both sides of the primary iron core are arranged one by one, and a plurality of winding coils of the conjugate winding are wound in the two correspondingly arranged second assembly grooves.

[0011] The beneficial effect of adopting the above further solution is that by providing the second assembly groove, the winding coils of the conjugate winding can be effectively wound and positioned.

[0012] Furthermore, the primary iron core includes multiple stacked primary silicon steel laminations, a first primary pressure plate and a second primary pressure plate, the top of the multiple primary silicon steel laminations is provided with a first primary pressure plate, and the bottom of the multiple primary silicon steel laminations is provided with a second primary pressure plate, the first primary pressure plate, the second primary pressure plate and the primary silicon steel laminations are connected and fixed by connecting parts; the second assembly groove is opened on the primary silicon steel laminations, the first primary pressure plate and the second primary pressure plate.

[0013] The beneficial effect of adopting the above further solution is that the primary iron core adopts a structure in which multiple primary silicon steel laminations, a first primary pressure plate and a second primary pressure plate are stacked, which has significant advantages such as compact structure, convenient production and processing, and high flexibility.

[0014] Furthermore, the primary iron core also includes a first cover plate and a second cover plate, the first cover plate is located on a side of the first primary pressure plate away from the primary silicon steel lamination, and the second cover plate is located on a side of the second primary pressure plate away from the primary silicon steel lamination; a first limiting groove is provided on the first cover plate, and a second limiting groove is provided on the second cover plate, and the first limiting groove, the second assembly grooves on both sides of the primary iron core, and the second limiting groove are arranged one by one; the winding coils of the conjugate winding are wound in a corresponding group of first limiting grooves, the second assembly grooves on both sides of the primary iron core, and the second limiting grooves.

[0015] The beneficial effect of adopting the above further solution is that by providing the first cover plate and the second cover plate, and providing limiting grooves on the cover plates, it is beneficial to effectively limit the winding coils of the conjugate winding.

[0016] Furthermore, limiting grooves are respectively provided on the two inner side walls at the notch of the second assembly groove, and the winding coil of the conjugate winding is located in the second assembly groove and does not exceed the limiting groove arrangement. A limiting block is provided in the limiting groove to limit the winding coil.

[0017] The beneficial effect of adopting the above further solution is that the winding coil can be effectively positioned by providing the limiting grooves and the limiting blocks.

[0018] Furthermore, a composite secondary is provided on each of the two opposite sides of the conjugate winding primary, and the conjugate winding primary is set to one or multiple ones connected in sequence along the axial direction, and the two axial ends of the conjugate winding primary do not exceed the two ends of the composite secondary or the two ends of the axial end of the conjugate winding primary exceed the preset length of the two ends of the composite secondary.

[0019] The beneficial effect of adopting the above-mentioned further scheme is: by setting a composite secondary and setting multiple conjugate winding primaries, the two axial ends of the conjugate winding primary are respectively extended beyond the preset lengths at both ends of the composite secondary, thereby forming a long primary and short secondary structure; multiple groups of conjugate winding primaries can be connected in series through a hanging mechanism, and the thrust output level covers a wide range.

[0020] Furthermore, multiple composite secondaries are arranged at intervals on opposite sides of the conjugate winding primary, the conjugate winding primary is set to one or multiple composite secondaries connected in sequence along the axial direction, and the multiple composite secondaries on the same side of the conjugate winding primary are connected and fixed in sequence along the axial direction parallel to the conjugate winding primary.

[0021] The beneficial effects of adopting the above-mentioned further scheme are: by arranging multiple composite secondaries on both sides of the conjugate winding primary; in the long primary and short secondary structure, multiple groups of composite secondaries can be connected in series through a hanging mechanism, and the thrust output level, operating speed and stroke coverage range are wide; multiple groups of conjugate winding primaries can also be connected in series through a hanging mechanism, and the thrust output level coverage range is wide.

[0022] The present invention also provides an assembly method for a conjugate double-sided magnetic field linear induction motor, comprising the following steps: milling first through holes at the same position on primary silicon steel laminations, a first primary pressure plate, and a second primary pressure plate, passing a connecting piece through the first through hole on the second primary pressure plate and fixing it to form a primary silicon steel lamination mounting bracket with a connecting piece, passing multiple primary silicon steel laminations with first through holes through the connecting piece in sequence, and finally passing the first through hole of the first primary pressure plate through the connecting piece, using the connecting piece to fix the first primary pressure plate, multiple primary silicon steel laminations, and second primary pressure plate into a primary iron core of an integral structure; placing an 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 with the insulating layer to isolate it from the groove wall of the second assembly groove; arranging a composite secondary at intervals on both sides of the conjugate winding primary with the second assembly groove, so that the squirrel cage bars of the composite secondary are arranged opposite the conjugate winding primary.

[0023] The assembly method of the present invention has simple process, convenient manufacturing and molding, and compact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structural principle of the conjugate double-field linear induction motor of the present invention; Figure 2 A schematic structural diagram of an embodiment of a conjugate double-field linear induction motor according to the present invention; Figure 3 A schematic structural diagram of another embodiment of the conjugate double-field linear induction motor of the present invention; Figure 4 This is a structural schematic diagram of a third embodiment of the conjugate double-sided magnetic field linear induction motor of the present invention.

[0025] In the accompanying drawings, the components represented by the reference numerals are as follows: 1. Conjugate winding primary; 11. Primary iron core; 12. Second assembly slot; 13. Winding coil; 14. First through hole; 15. Limit block; 2. Composite secondary; 21. Back iron; 22. First assembly slot; 23. Squirrel cage bar; 24. Second through hole; 3. Casing. DETAILED DESCRIPTION

[0026] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0027] Example 1 like Figures 1 to 4As shown, a conjugate double-field linear induction motor of this embodiment includes a conjugate winding primary 1 and a composite secondary 2, wherein a group of composite secondary 2 is provided on opposite sides of the conjugate winding primary 1; the composite secondary 2 includes a back iron 21 and a squirrel cage bar 23 embedded in the back iron 21, and the squirrel cage bars 23 of the two groups of the composite secondary 2 are arranged opposite to each other.

[0028] The conjugate winding primary 1 and the composite secondary 2 of this embodiment can both adopt a modular design that is easy to splice and install.

[0029] The conjugate winding primary 1 and the composite secondary 2 of this embodiment can be arranged in the housing 3, as shown in FIG. Figure 4 shown.

[0030] The conjugate winding primary of this embodiment is loaded with multi-phase AC current to generate Figure 1 The bilaterally symmetrical air gap magnetic field, shown by the dashed line, is closed by the bilateral stator magnetic back iron (composite secondary 2) and the primary silicon steel laminations in the conjugate winding primary 1. This creates a closed magnetic circuit, coupling the primary winding magnetic field into a conjugate symmetrical field. This conjugate symmetrical traveling wave magnetic field induces closed eddy currents in the squirrel cage bars on both sides. These eddy currents, in the conjugate winding traveling wave magnetic field, are subjected to the Lorentz force, generating thrust, providing horizontal power to the load. This closed flux path improves air gap flux density utilization, resulting in a thrust density 1.8 to 2.2 times that of a conventional single-sided motor. The normal attraction of the conjugate symmetrical magnetic field on the primary cancels out, resulting in a net normal force approaching zero. The conjugate winding minimizes end effects, reducing eddy current and copper losses, resulting in a 12% to 18% improvement in system efficiency under full load conditions. The conjugate winding structure further optimizes magnetic field uniformity, making the motor system more compact. Improved heat dissipation and more uniform temperature distribution reduce system thermal stress.

[0031] In the conjugate double-sided magnetic field linear induction motor of this embodiment, a group of composite secondary 2 is arranged at intervals on both sides of the conjugate winding primary 1. Under special working conditions, the composite secondary on one side can be eliminated and a single-sided structure can be adopted for operation.

[0032] A conjugated double-sided magnetic field linear induction motor of this embodiment is provided with a group of composite secondaries on opposite sides of the conjugated winding primary. When the motor is powered on and running, the multi-phase conjugated winding primary will generate a double-sided conjugated 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.

[0033] The conjugate double-sided magnetic field linear induction motor of this embodiment has significant advantages, including compact structure, balanced primary net normal force, easy production and processing, and high flexibility. In terms of operating characteristics, the conjugate winding primary structure is more compact, the composite secondary core yoke thickness is smaller, and the magnetic field utilization rate is higher. The conjugate double-sided magnetic field design, combined with intelligent control algorithms and harmonic suppression technology, significantly improves the thrust density, energy efficiency ratio, and operating stability of the linear induction motor. The double-sided conjugate symmetrical magnetic field, combined with the symmetrical magnetic circuit design, achieves a more balanced primary normal force. In terms of processing and manufacturing, the composite secondary squirrel cage bars are directly inserted or cast, and the conjugate winding primary is directly wound. The modular design significantly improves production efficiency.

[0034] The conjugate double-field linear induction motor of this embodiment can be applied to various high-power density occasions such as payload launch and recovery, impact collision, and low-altitude economy in military and civilian fields.

[0035] Example 2 Based on Example 1, this example provides a preferred solution for the assembly of the back iron 21 and the cage bars 23. Figures 1 to 4 As shown, the side of the back iron 21 facing the conjugate winding primary 1 is provided with a plurality of first assembly slots 22. These first assembly slots 22 are arranged in a sequentially spaced arrangement parallel to the axis of the conjugate winding primary 1. Each first assembly slot 22 is embedded with a cage bar 23. One end of each of the cage bars 23 is connected and fixed to a first conductive bar on one side of the back iron 21, and the other end of each of the cage bars 23 is connected and fixed to a second conductive bar on the other side of the back iron 21. The first assembly slots 22 serve to limit and secure the cage bars 23. By providing a plurality of first assembly slots on the side of the back iron facing the conjugate winding primary, each first assembly slot is provided with a cage bar, and the cage bars are connected and fixed by conductive bars, resulting in a compact structure. The cage bars, first conductive bars, and second conductive bars are made of the same material, which can be copper or aluminum. The back iron is made of iron. Thus, when the composite secondary is energized, a closed induced current return flow is formed in the first conductive bar, the second conductive bar, and the cage bars.

[0036] Furthermore, the extending direction of the first assembly slot 22 is perpendicular to the axis of the conjugate winding primary 1 .

[0037] In this embodiment, second through holes 24 can be opened on the first conductive bar, the second conductive bar and the back iron 21. The second through holes 24 on the first conductive bar, the second conductive bar and the back iron 21 are arranged one by one, and a group of correspondingly arranged second through holes 24 are fixedly connected by passing screws.

[0038] Among them, in order to reduce eddy current loss and improve motor efficiency, the secondary back iron can be made of stacked silicon steel sheets, and second through holes 24 can also be opened on the stacked silicon steel sheets. After stacking, the first conductor bar and the second conductor bar are respectively arranged at the top and bottom of the stack body, and fixed connection is achieved by passing screws through a group of correspondingly arranged second through holes 24.

[0039] Specifically, the first assembly slot 22 of this embodiment 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 cage bars 23 matches the shape of the dovetail slot. The cage bars 23 have a higher conductivity than the back iron 21 and extend perpendicular to the axial direction of the conjugate winding primary 1.

[0040] The two ends of the squirrel cage bar 23 of this embodiment can be flush with the two side surfaces of the back iron 21, or can slightly extend beyond the side surfaces of the back iron 21, so as to connect the two conductive bars to form an integral loop.

[0041] Example 3 Based on Example 1 or Example 2, this embodiment provides a preferred solution for the conjugate winding primary. The conjugate winding primary 1 includes a primary core 11 and a conjugate winding, which is wound on the primary core 11 and isolated from the primary core 11 by an insulating layer.

[0042] like Figures 1 to 4 As shown, a preferred solution of this embodiment is that a plurality of second assembly slots 12 with two ends extending therethrough are provided on both sides of the primary core 11 facing the composite secondary 2. The plurality of second assembly slots 12 on one side of the primary core 11 are sequentially spaced along the axial direction of the conjugate winding primary 1. The second assembly slots 12 on both sides of the primary core 11 are arranged in a one-to-one correspondence, and a plurality of winding coils 13 of the conjugate winding are wound in two correspondingly arranged second assembly slots 12. By providing the second assembly slots, the winding coils of the conjugate winding can be effectively wound and positioned.

[0043] Specifically, the second assembly slot 12 extends perpendicular to the axis of the primary core 11. Slot insulation is first placed in the second assembly slot, and then the winding coil is placed on the slot insulation. The slot insulation wraps the winding coil to form an insulating layer, preventing direct contact between the winding coil and the primary core 11. The winding coil is formed by winding multiple turns of multiple strands of rectangular copper wire.

[0044] A specific solution of this embodiment is that the primary core 11 includes multiple stacked primary silicon steel laminations, a first primary pressure plate, and a second primary pressure plate. The first primary pressure plate is provided on the top of the multiple primary silicon steel laminations, and the second primary pressure plate is provided on the bottom of the multiple primary silicon steel laminations. The first primary pressure plate, the second primary pressure plate, and the primary silicon steel laminations are connected and fixed by a connector; the second assembly slot 12 is provided in the primary silicon steel laminations, the first primary pressure plate, and the second primary pressure plate. The primary core adopts a structural form of multiple stacked primary silicon steel laminations, the first primary pressure plate, and the second primary pressure plate, which has significant advantages such as compact structure, convenient production and processing, and high flexibility.

[0045] Preferably, the primary core 11 of this embodiment further includes a first cover plate and a second cover plate, wherein the first cover plate is located on a side of the first primary pressure plate away from the primary silicon steel laminate, and the second cover plate is located on a side of the second primary pressure plate away from the primary silicon steel laminate; a first limiting groove is provided on the first cover plate, and a second limiting groove is provided on the second cover plate, wherein the first limiting groove, the second assembly grooves 12 on both sides of the primary core 11, and the second limiting groove are arranged in a one-to-one correspondence; the winding coil 13 of the conjugate winding is wound in a corresponding set of first limiting grooves, the second assembly grooves 12 on both sides of the primary core 11, and the second limiting groove. The width of the first cover plate and the second cover plate does not exceed the width of the first primary pressure plate and the second primary pressure plate, and the length of the first cover plate and the second cover plate does not exceed the length of the first primary pressure plate and the second primary pressure plate; by providing the first cover plate and the second cover plate, and providing the limiting grooves on the cover plates, it is beneficial to effectively limit the winding coil of the conjugate winding, and also guide and fix the winding coil when winding the winding coil. The bottoms of the first limiting groove and the second limiting groove can be rounded at the bends of the coil to provide guidance and end support for the winding of the conjugate winding.

[0046] Specifically, the connecting member of this embodiment can be a screw, which can be used in conjunction with a nut to achieve 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. The primary silicon steel laminations, the first cover plate, the second cover plate, the first primary pressure plate, and the second primary pressure plate are all processed with a plurality of first through holes 14, and after being stacked into the primary iron 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 to each other. A screw is inserted through each corresponding group of first through holes 14. More than two groups of first through holes 14 can be provided, which is conducive to the stable assembly of the various components of the primary iron core 11. A screw is inserted through each group of first through holes 14. 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 stacking height of the primary silicon steel laminations and the thickness of the two primary pressure plates. The first cover plate and the second cover plate are not connected and fixed by screws, but can be positioned with the corresponding primary pressing plate by a positioning structure, and then fixed by winding the winding coil. The positioning structure can adopt a structure in which a positioning groove and a positioning protrusion cooperate.

[0047] In this embodiment, the primary silicon steel laminates, the first primary pressure plate, and the second primary pressure plate have the same profile. The assembly slots on both sides of the primary silicon steel laminates, the assembly slots on both sides of the first primary pressure plate, and the assembly slots on both sides of the second primary pressure plate are identical in number and position, and together form the second assembly slot.

[0048] The first and second cover plates of this embodiment are preferably made of insulating and non-magnetic materials; the primary silicon steel laminations, the first and second primary pressure plates are all made of metal materials.

[0049] In this embodiment, the conjugate winding coil 13 is wound directly around the primary core, with the two effective sides of the winding coil 13 positioned within the second mounting slots 12 on either side, respectively, to generate a bilaterally conjugate, symmetrical, quasi-sinusoidal air-gap magnetic field. The length of the conjugate winding primary in this embodiment can be adjusted based on actual needs.

[0050] Example 4 Based on Example 3, this embodiment provides a preferred arrangement of a conjugate winding. Figure 1 As shown, the two inner sidewalls of the second assembly slot 12 at the notch are provided with limit slots. The winding coil of the conjugate winding is positioned within the second assembly slot 12 and does not exceed the limit slots. The limit slots are provided with limit blocks 15 for limiting the position of the winding coil. By providing the limit slots and limit blocks, the winding coil can be effectively positioned. The limit blocks 15 can be made of metal.

[0051] Further preferably, the limiting groove of this embodiment is a triangular structure, and the two limiting grooves and the notch area of ​​the second assembly groove 12 together form a wedge-shaped groove structure. The limiting block 15 is shaped like a wedge-shaped block adapted to the wedge-shaped groove, and the wedge block is adapted to be installed in the wedge-shaped groove to limit the winding coil in the second assembly groove 12.

[0052] Example 5 Based on any one of the embodiments 1 to 4, this embodiment provides an optional solution for a motor. Figure 1 and Figure 3 As shown, a composite secondary 2 is provided at intervals on opposite sides of the conjugate winding primary 1. The conjugate winding primary 1 is provided as one or multiple conjugate winding primary 1s connected in sequence along the axial direction. The axial ends of the conjugate winding primary 1 do not exceed the ends of the composite secondary 2 or the axial ends of the conjugate winding primary 1 respectively exceed the preset lengths of the ends of the composite secondary 2. By providing a composite secondary and multiple conjugate winding primary 1s, the multiple conjugate winding primary 1s can be designed by modular unit splicing. According to actual needs, the axial ends of the conjugate winding primary 1 can be made to exceed the preset lengths of the ends of the composite secondary 2. Multiple groups of conjugate winding primary 1s can be connected in series through a hooking mechanism, and the thrust output level covers a wide range. By splicing or connecting modular units, the requirements of different acceleration strokes, speeds, and output thrust levels can be met, while expanding its application potential in the field of green energy.

[0053] Example 6 Based on any one of the embodiments 1 to 4, this embodiment provides an optional solution for a motor. Figure 2 As shown, multiple composite secondaries 2 are spaced apart on opposite sides of the conjugate winding primary 1. The conjugate winding primary 1 is provided as one, and the multiple composite secondaries 2 on the same side of the conjugate winding primary 1 are sequentially connected and fixed along an axis parallel to the conjugate winding primary 1. Multiple composite secondaries 2 can be provided on each side of the conjugate winding primary 1. The multiple composite secondaries 2 can also be designed by splicing modular units. For example, they can be connected in series through a hooking mechanism, covering a wide range of thrust output levels, operating speeds, and travels. By splicing or connecting modular units in series, the requirements of different acceleration travels, speeds, and output thrust levels can be met, while expanding its application potential in the field of green energy.

[0054] Example 7 Based on any one of the embodiments 1 to 4, this embodiment provides an optional solution for a motor. Figure 4As shown, multiple composite secondaries 2 are spaced apart on opposite sides of the conjugate winding primary 1. The conjugate winding primary 1 is configured as a plurality of composite secondaries connected in sequence along the axial direction. The multiple composite secondaries 2 on the same side of the conjugate winding primary 1 are sequentially connected and fixed along the axis parallel to the conjugate winding primary 1. Multiple composite secondaries 2 can be provided on each side of the conjugate winding primary 1. The multiple composite secondaries 2 can also be designed as a modular unit splicing structure. For example, they can be connected in series through a hooking mechanism to cover a wide range of thrust output levels, operating speeds, and travels. Multiple groups of conjugate winding primaries can also be connected in series through a hooking mechanism to cover a wide range of thrust output levels. By splicing or connecting modular units in series, the needs of different acceleration travels, speeds, and output thrust levels can be met, while expanding its application potential in the field of green energy.

[0055] Example 8 This embodiment further provides an assembly method for a conjugate double-sided magnetic field linear induction motor according to any one of Embodiments 3 to 5, comprising the following steps: milling first through holes 14 at the same position on primary silicon steel laminates, a first primary pressure plate, and a second primary pressure plate; passing a connector through the first through hole 14 on the second primary pressure plate and fixing the connector to form a primary silicon steel laminate mounting bracket with a connector; sequentially passing multiple primary silicon steel laminates with the first through holes 14 through the connector; and finally passing the first through hole 14 of the first primary pressure plate through the connector; using the connector to fix the first primary pressure plate, the multiple primary silicon steel laminates, and the second primary pressure plate into a primary core 11 of an integral structure; placing an insulating layer (slot insulation) in the second assembly slot 12, placing a winding coil of the conjugate winding on the insulating layer of the second assembly slot 12, and wrapping the winding coil with the insulating layer to isolate it from the slot wall of the second assembly slot 12; and arranging a composite secondary 2 at intervals on both sides of the conjugate winding primary 1 where the second assembly slot 12 is opened, so that the cage bars 23 of the composite secondary 2 are arranged directly opposite the conjugate winding primary 1.

[0056] Among them, when assembling the composite secondary 2, the squirrel cage bars 23 can be inserted into the first assembly groove 22 of the back iron 21 in sequence, and then the first conductor bar and the second conductor bar are connected and locked to the back iron 21 through screws. The connection, locking and fixing method is the same as the connection, locking and fixing method of the conjugate winding primary.

[0057] The assembly method of this embodiment has a simple process, is convenient for manufacturing and molding, and has a compact structure.

[0058] In the description of the present invention, it should be understood that the terms "top", "bottom", "axial", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0060] In the present invention, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; they may refer to direct connection or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0061] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0062] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean 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 invention. In this specification, the schematic representations of the above terms do not necessarily refer 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 this specification and features of different embodiments or examples without contradiction.

[0063] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A conjugate double-field linear induction motor, characterized in that: It comprises a conjugate winding primary and a composite secondary, wherein a group of composite secondary is provided at intervals on opposite sides of the conjugate winding primary; the composite secondary comprises a back iron and a squirrel cage bar embedded in the back iron, and the squirrel cage bars of the two groups of composite secondary are arranged oppositely.

2. The conjugate double-field linear induction motor according to claim 1, characterized in that: A plurality of first assembly grooves are provided on a side of the back iron facing the primary of the conjugate winding. The plurality of first assembly grooves are arranged in sequence and spaced apart along an axial direction parallel to the primary of the conjugate winding. A squirrel cage bar is embedded in each of the first assembly grooves. One end of the plurality of squirrel cage bars is connected and fixed to the first conductor bar on one side of the back iron, and the other end of the plurality of squirrel cage bars is connected and fixed to the second conductor bar on the other side of the back iron.

3. The conjugate double-field linear induction motor according to claim 1, characterized in that: The conjugate winding primary comprises a primary core and a conjugate winding. The conjugate winding is wound on the primary core and isolated from the primary core by an insulating layer.

4. The conjugate double-field linear induction motor according to claim 3, characterized in that: The primary core is provided with a plurality of second assembly grooves with both ends passing through on both sides of the composite secondary. The plurality of second assembly grooves on one side of the primary core are arranged in sequence along the axial direction of the primary of the conjugate winding. The second assembly grooves on both sides of the primary core are arranged in a one-to-one correspondence, and a plurality of winding coils of the conjugate winding are wound in the two correspondingly arranged second assembly grooves.

5. The conjugate double-field linear induction motor according to claim 4, characterized in that: The primary iron core includes multiple stacked primary silicon steel laminations, a first primary pressure plate and a second primary pressure plate. The first primary pressure plate is provided on the top of the multiple primary silicon steel laminations, and the second primary pressure plate is provided on the bottom of the multiple primary silicon steel laminations. The first primary pressure plate, the second primary pressure plate and the primary silicon steel laminations are connected and fixed by connecting parts; the second assembly groove is opened on the primary silicon steel laminations, the first primary pressure plate and the second primary pressure plate.

6. The conjugate double-field linear induction motor according to claim 5, characterized in that: The primary iron core also includes a first cover plate and a second cover plate, the first cover plate is located on a side of the first primary pressure plate away from the primary silicon steel lamination, and the second cover plate is located on a side of the second primary pressure plate away from the primary silicon steel lamination; a first limiting groove is provided on the first cover plate, and a second limiting groove is provided on the second cover plate, and the first limiting groove, the second assembly grooves on both sides of the primary iron core, and the second limiting groove are arranged one by one; the winding coils of the conjugate winding are wound in a corresponding group of first limiting grooves, the second assembly grooves on both sides of the primary iron core, and the second limiting groove.

7. The conjugate double-field linear induction motor according to any one of claims 4 to 6, characterized in that: Limiting grooves are respectively provided on the two inner side walls at the notch of the second assembly groove. The winding coil of the conjugate winding is located in the second assembly groove and does not exceed the limiting groove arrangement. A limiting block is provided in the limiting groove to limit the winding coil.

8. The conjugate double-field linear induction motor according to any one of claims 1 to 6, characterized in that: A composite secondary is provided on each of the opposite sides of the conjugate winding primary. The conjugate winding primary is set to one or multiple ones connected in sequence along the axial direction. The two axial ends of the conjugate winding primary do not exceed the two ends of the composite secondary or the two ends of the axial end of the conjugate winding primary exceed the preset length of the two ends of the composite secondary.

9. The conjugate double-field linear induction motor according to any one of claims 1 to 6, characterized in that: Multiple composite secondaries are arranged at intervals on opposite sides of the conjugate winding primary. The conjugate winding primary is set to one or multiple composite secondaries connected in sequence along the axial direction. The multiple composite secondaries on the same side of the conjugate winding primary are connected and fixed in sequence along the axial direction parallel to the conjugate winding primary.

10. A method for assembling the conjugate double-field linear induction motor according to claim 5 or 6, characterized in that: The invention comprises the following steps: milling first through holes at the same position on primary silicon steel laminations, a first primary pressing plate and a second primary pressing plate, passing a connecting piece through the first through hole on the second primary pressing plate and fixing it to form a primary silicon steel lamination mounting bracket with a connecting piece, passing multiple primary silicon steel laminations with the first through holes through the connecting piece in sequence, and finally passing the first through hole of the first primary pressing plate through the connecting piece, and using the connecting piece to fix the first primary pressing plate, multiple primary silicon steel laminations and the second primary pressing plate into a primary iron core of an integral structure; placing an 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 with the insulating layer to isolate it from the groove wall of the second assembly groove; arranging a composite secondary at intervals on both sides of the conjugate winding primary with the second assembly groove, so that the squirrel cage bars of the composite secondary are arranged opposite to the conjugate winding primary.

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