High-overload synchronous induction electromagnetic acceleration platform

Abstract

The application relates to a high-overload synchronous induction electromagnetic acceleration platform, which comprises a primary coil and a secondary coil, the secondary coil is a mover, the primary coil is a stator, the primary coil is located on the two sides of the secondary coil, the primary coil generates a magnetic field around after current is passed through, the secondary coil induces eddy current in the changing magnetic field, and the secondary coil moves at high speed forward under the interaction of the self eddy current and the magnetic field. The primary coil and the secondary coil can be expanded in an array mode according to actual needs, so that the acceleration requirements of loads with different masses, different volumes and different overloads can be realized.

Description

Technical Field

[0001] This invention belongs to the field of acceleration of moving objects, and specifically relates to a high overload synchronous induction electromagnetic acceleration platform. Background Technology

[0002] An electromagnetic acceleration platform is a device that uses electromagnetic force to accelerate a load. It has a wide range of applications in various fields. In the aerospace field, it can be used to accelerate satellites and spacecraft. In the experimental field, it can be used for impact testing, overload testing, acceleration testing, and materials mechanics testing.

[0003] Currently, electromagnetic acceleration platforms commonly use track-type acceleration platforms and coaxial induction coil-type acceleration platforms. Track-type acceleration platforms involve sliding electrical contacts during acceleration, resulting in short lifespan and poor scalability. Coaxial induction electromagnetic acceleration platforms, due to their structure, are only suitable for propelling small-mass objects. Propelling large-mass objects requires a large aperture, which drastically increases the volume and results in poor scalability.

[0004] Among the common acceleration platform devices reported in the relevant literature, there are: (1) A retrievable continuous hammering device based on an electromagnetic coil gun (CN202210092332.1), which uses a coaxial coil electromagnetic thruster, which is not suitable for large mass load propulsion and has poor expandability. (2) A variable load electromagnetic railgun acceleration test device (CN202311215259.3), which uses a rail-type acceleration armature method. During the acceleration process, there is physical friction, which has the defects of short life, small acceleration mass and poor expandability. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention proposes a high-overload synchronous induction electromagnetic acceleration platform. This platform is a convenient, simple, reliable, and highly scalable ultra-high-speed electromagnetic acceleration platform. It utilizes a secondary coil that induces eddy currents within a changing magnetic field generated by the primary coil, accelerating the secondary coil through the interaction of these eddy currents with the magnetic field. During operation, there is no friction between the secondary and primary coils, resulting in a long service life. Furthermore, the primary and secondary coils can be arrayed and expanded to meet experimental requirements of varying masses, volumes, and overloads.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A high-overload synchronous induction electromagnetic acceleration platform includes a primary coil and a secondary coil. The secondary coil is a mover, and the primary coil is a stator. The primary coil is disposed on both sides of the secondary coil. When current is passed through the primary coil, a changing magnetic field is generated. Eddy currents are induced in the secondary coil in the changing magnetic field. The eddy currents interact with the magnetic field to generate an axial electromagnetic force, which drives the secondary coil to move at high speed along the axial direction.

[0008] Furthermore, there is no contact between the primary coil and the secondary coil.

[0009] Furthermore, the primary coil is made of wire.

[0010] Furthermore, the secondary coil is a conductor or a closed coil.

[0011] Furthermore, there are multiple primary coils, which are arranged in a longitudinal array.

[0012] Furthermore, there are multiple primary coils, which are distributed in a transverse array.

[0013] Furthermore, there are multiple primary coils, which are distributed in an array along the horizontal and vertical directions.

[0014] Furthermore, there are multiple secondary coils, which are distributed in a horizontal array, and the primary coils are correspondingly distributed in a horizontal array.

[0015] Furthermore, there are multiple secondary coils, which are arranged in a longitudinal array, and the primary coils are also arranged in a corresponding longitudinal array.

[0016] Furthermore, the primary coils are electrically connected in series or in parallel.

[0017] Beneficial effects:

[0018] This invention employs an inductive electromagnetic drive structure with primary and secondary coils arranged separately. The secondary coil induces eddy currents in the changing magnetic field generated by the primary coil. The interaction between these eddy currents and the magnetic field produces axial electromagnetic force, achieving contactless drive between the stator and rotor. This fundamentally eliminates equipment wear caused by physical friction and significantly extends the system's lifespan. Based on a coil array-style horizontal, vertical, and combined horizontal-vertical expansion method, the acceleration platform can flexibly adjust the drive scale according to the actual mass and volume requirements of the load. This overcomes the structural limitations of traditional coaxial induction coils, which are only suitable for small-mass loads, and avoids the drawback of track-type structures where volume increases dramatically with aperture, achieving excellent scalability. Multiple primary coils are electrically connected in series or parallel, and with synchronous acceleration control of multiple sets of secondary coils, acceleration overload can be precisely adjusted to meet the dynamic parameter requirements of different test scenarios. Furthermore, the secondary coils can be directly connected to the load, reducing intermediate force transmission links, lowering energy transfer losses, and improving acceleration efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of an invention for a high-overload synchronous induction electromagnetic acceleration platform, using a single set of secondary coils and a single set of primary coils as an example.

[0020] Figure 2 This is a schematic diagram of a high overload synchronous induction electromagnetic acceleration platform according to Embodiment 1 of the present invention, wherein there is one set of secondary coils and one set of primary coils.

[0021] Figure 3 This is a schematic diagram of a high overload synchronous induction electromagnetic acceleration platform according to Embodiment 2 of the present invention, wherein the secondary coil is a group; the primary coil is a group horizontally and multiple groups vertically.

[0022] Figure 4 This is a schematic diagram of a high overload synchronous induction electromagnetic acceleration platform according to Embodiment 3 of the present invention, wherein the secondary coils are arranged in multiple groups horizontally and one group vertically; the primary coils are arranged in multiple groups horizontally and one group vertically.

[0023] Figure 5 This is a schematic diagram of a high overload synchronous induction electromagnetic acceleration platform according to Embodiment 4 of the present invention, wherein the secondary coils are arranged in multiple groups horizontally and in one group vertically; the primary coils are arranged in multiple groups horizontally and in multiple groups vertically.

[0024] Figure 6 This is a schematic diagram of a high overload synchronous induction electromagnetic acceleration platform according to Embodiment 5 of the present invention, wherein the secondary coils are arranged in multiple groups horizontally and vertically; the primary coils are arranged in multiple groups horizontally and vertically.

[0025] The attached diagram is labeled as follows: 1. Secondary coil; 2. Primary coil; 3. Fixed guide rail. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0027] like Figure 1 As shown, taking a single set of secondary coils and a single set of primary coils as an example, the high overload synchronous induction electromagnetic acceleration platform of the present invention includes two non-contact primary coils 2 and one secondary coil 1. The two primary coils 2 are horizontally distributed with a certain distance between them, and the secondary coil 1 is located in the middle of the two primary coils 2. The two primary coils 2 and the one secondary coil 1 maintain their centers on the same horizontal plane. When current is simultaneously applied to the two primary coils 2, a rapidly changing magnetic field is generated near the secondary coil 1. The secondary coil 1 induces a current in the changing magnetic field, and under the interaction of its own induced current and the magnetic field, the secondary coil 1 accelerates forward.

[0028] In this invention, the secondary coil 1 is a conductor or a closed coil, and the primary coil 2 is made of wire. The primary coil 2 is located on both sides of the secondary coil 1. By passing current through the primary coil 2, a magnetic field is generated around it. The secondary coil 1 induces eddy currents in the changing magnetic field and moves forward at high speed under the action of its own eddy currents and the magnetic field. Figure 1 In the diagram, B represents the magnetic field generated by the primary coil. r I is the radial component of the magnetic field strength of the primary coil at a certain point. d I is the primary coil current. s This is the induced current in the secondary coil. F z The secondary coil is subjected to axial force.

[0029] Example 1:

[0030] like Figure 2 As shown, taking a secondary coil and a set of primary coils as an example, it includes two primary coils 2, two fixed rails 3, and one secondary coil 1. The secondary coil 1 adopts a double-concave structure and is located in the middle of the two primary coils 2; the primary coils 2 are made of spiral wire; the fixed rail 3 is a long cylindrical object with a groove for placing the primary coils 2. The primary coils 2 are fixed on the fixed rail 3, and the primary coils 2 and the fixed rail 3 are concentric. The secondary coil 1 is located at the center of the two primary coils 2, and the primary coils 2, secondary coil 1, and fixed rail 3 are on the same horizontal plane.

[0031] Example 2:

[0032] Figure 3 As shown, taking a secondary coil and seven sets of primary coils arranged longitudinally as an example, the system includes 14 primary coils 2, 2 fixed guide rails 3, and 1 secondary coil 1. The secondary coil 1 has a double-concave structure and is located between the two fixed guide rails 3. The primary coils 2 are made of spirally wound wire. The fixed guide rails 3 are long cylindrical objects with multiple grooves for placing the primary coils 2. The primary coils 2 are fixed in the grooves of the fixed guide rails 3, and the primary coils 2 and the fixed guide rails 3 are concentric. The secondary coil 1 is located in the middle of the two fixed guide rails 3, and the primary coils 2, secondary coil 1, and fixed guide rails 3 are on the same horizontal plane.

[0033] Example 3:

[0034] Figure 4 As shown, taking a horizontally distributed configuration of four secondary coils and five sets of horizontally distributed primary coils as an example, the configuration includes five primary coils 2, five fixed rails 3, and four secondary coils 1. The primary coils 2 can be powered in series or in parallel. During acceleration, the secondary coils 1 accelerate synchronously. The secondary coils 1 adopt a double-concave structure and are located in the middle of adjacent fixed rails 3. The primary coils 2 are made of spirally wound wire. The fixed rails 3 are long cylindrical objects with grooves for placing the primary coils 2. The primary coils 2 are fixed in the grooves of the fixed rails 3, and the primary coils 2 and the fixed rails 3 are concentric. The secondary coils 1 are located in the middle of two adjacent fixed rails 3, and the primary coils 2, secondary coils 1, and fixed rails 3 are on the same horizontal plane.

[0035] Example 4:

[0036] Figure 5 As shown, taking a configuration of five groups of secondary coils distributed horizontally and primary coils distributed in seven rows horizontally and five columns vertically as an example, it includes a total of 42 primary coils 2, 6 fixed rails 3, and 5 secondary coils 1. The primary coils 2 can be powered in series or in parallel. During acceleration, the secondary coils accelerate synchronously. The secondary coils 1 adopt a double-concave structure and are located in the middle of adjacent fixed rails 3. The primary coils 2 are made of spiral wire. The fixed rails 3 are long cylindrical objects, each with 7 grooves for placing the primary coils 2, which are distributed in a distributed manner. The primary coils 2 are fixed on the grooves of the fixed rails 3, and the primary coils 2 and the fixed rails 3 are concentric. The secondary coils 1 are located in the middle of two fixed rails 3, and the primary coils 2, secondary coils 1, and fixed rails 3 are on the same horizontal plane.

[0037] Example 5:

[0038] Figure 6As shown, taking a configuration of three rows horizontally and five columns vertically for secondary coils and seven rows horizontally and five columns vertically for primary coils as an example, the system comprises 42 primary coils 2, 6 fixed rails 3, and 15 secondary coils 1. The primary coils 2 can be powered in series or parallel, and the secondary coils accelerate synchronously during acceleration. The secondary coils 1 have a double-concave structure and are located in the middle of adjacent fixed rails 3. The primary coils 2 are made of spirally wound wire. The fixed rails 3 are long cylindrical objects, each with seven grooves for placing the primary coils 2, which are distributed in a distributed manner. The primary coils 2 are fixed in the grooves of the fixed rails 3, and are concentric with the fixed rails 3. The secondary coils 1 are located in the middle of two fixed rails 3, and the primary coils 2, secondary coils 1, and fixed rails 3 are on the same horizontal plane.

[0039] Preferably, the secondary coil can be a conductor or one or more closed coils.

[0040] Preferably, the number of secondary coils can be one or more.

[0041] Preferably, the primary coil and the secondary coil are not in contact.

[0042] Preferably, the primary coil is located on both sides of the secondary coil.

[0043] Preferably, the primary coil is made of wire.

[0044] Preferably, the current flowing through the primary coil can be a constant current or a variable current.

[0045] Preferably, the number of primary coils is variable; it can be multiple primary coils arranged horizontally, multiple primary coils arranged vertically, or multiple coils distributed in an array.

[0046] Preferably, the multiple primary coils can be connected in parallel or in series.

[0047] Preferably, multiple primary coils are electrically connected.

[0048] Preferably, the secondary coil is not in contact with the primary coil. Multiple primary and secondary coils can be used as a power source to accelerate the load, depending on the actual needs of the acceleration load.

[0049] The principle of this invention is as follows:

[0050] In a changing magnetic field, the magnetic flux through the secondary coil's cross-section constantly changes, inducing eddy currents on the coil's surface. The skin depth of these eddy currents refers to the depth at which the magnetic field strength near the surface of the secondary coil decays to 1 / e of its original value (where e is the natural constant). For electromagnetic fields inside a conductor, the skin depth can typically be expressed as:

[0051] ;

[0052] in, It is skin depth, It is the angular frequency in an electromagnetic field. It is the magnetic permeability of the conductor. It is the electrical conductivity of a conductor.

[0053] Treating the secondary coil as a closed loop, when the secondary coil passes through a magnetic field, it will induce an electromotive force, which can be expressed mathematically as follows:

[0054] ;

[0055] in, It is an induced electromotive force. t is magnetic flux, and t is time.

[0056] According to the Ampere force calculation formula, the secondary coil is subjected to axial force. for:

[0057] ;

[0058] in, For the induced current in the secondary coil, The effective length of the secondary coil in the magnetic field. This represents the radial magnetic flux density. The arrows above each parameter indicate the vector direction.

[0059] During operation, the secondary coil accelerates as follows:

[0060] ;

[0061] in, For the quality of the secondary coil, The axial electromagnetic force of the secondary coil. For the resistance during operation, It is expressed as acceleration.

[0062] The operating speed of the secondary coil is: ;

[0063] in, This represents the initial velocity.

[0064] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-overload synchronous induction electromagnetic acceleration platform, characterized in that, It includes two primary coils, two fixed tracks, and one secondary coil. The secondary coil is the mover, and the primary coil is the stator. The primary coil is arranged on both sides of the secondary coil. When current is passed through the primary coil, it generates a changing magnetic field. The secondary coil induces eddy currents in the changing magnetic field. The eddy currents interact with the magnetic field to generate an axial electromagnetic force, which drives the secondary coil to move at high speed along the axial direction of the secondary coil. The secondary coil adopts a double concave structure and is located in the middle of the two primary coils. The primary coil is made of spiral wire. The fixed guide rail is a long cylindrical object with a groove for placing the primary coil. The primary coil is fixed on the fixed guide rail and is concentric with the fixed guide rail. The secondary coil is located at the center of the two primary coils. The primary coil, secondary coil, and fixed guide rail are on the same horizontal plane. The axial extension direction of the primary coil is the same as the axial extension direction of the secondary coil. The secondary coil is a conductor or a closed coil.

2. The high overload synchronous inductive electromagnetic acceleration platform according to claim 1, characterized in that, There is no contact between the primary coil and the secondary coil.

3. The high overload synchronous induction electromagnetic acceleration platform according to claim 1, characterized in that, The primary coil is made of wire.

4. The high overload synchronous inductive electromagnetic acceleration platform according to claim 1, characterized in that, The number of primary coils is multiple, and the multiple primary coils are distributed in a longitudinal array.

5. The high overload synchronous inductive electromagnetic acceleration platform according to claim 1, characterized in that, The number of primary coils is multiple, and the multiple primary coils are distributed in a horizontal array.

6. The high overload synchronous inductive electromagnetic acceleration platform according to claim 1, characterized in that, The number of primary coils is multiple, and the multiple primary coils are distributed in an array along the horizontal and vertical directions.

7. The high overload synchronous induction electromagnetic acceleration platform according to any one of claims 5-6, characterized in that, The number of secondary coils is multiple, and the multiple secondary coils are distributed in a horizontal array, and the primary coils are correspondingly distributed in a horizontal array.

8. The high overload synchronous induction electromagnetic acceleration platform according to claim 7, characterized in that, The number of secondary coils is multiple, and the multiple secondary coils are distributed in a longitudinal array, and the primary coils are correspondingly distributed in a longitudinal array.

9. The high overload synchronous inductive electromagnetic acceleration platform according to any one of claims 4 to 6, characterized in that, The primary coils are electrically connected in series or in parallel.

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