CN115585707A - External magnetic field enhanced electromagnetic track accelerating device and implementation method thereof - Google Patents
External magnetic field enhanced electromagnetic track accelerating device and implementation method thereof Download PDFInfo
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- CN115585707A CN115585707A CN202211330293.0A CN202211330293A CN115585707A CN 115585707 A CN115585707 A CN 115585707A CN 202211330293 A CN202211330293 A CN 202211330293A CN 115585707 A CN115585707 A CN 115585707A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
- F41B6/00—Electromagnetic launchers ; Plasma-actuated launchers
- F41B6/006—Rail launchers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
- F41B6/00—Electromagnetic launchers ; Plasma-actuated launchers
- F41B6/003—Electromagnetic launchers ; Plasma-actuated launchers using at least one driving coil for accelerating the projectile, e.g. an annular coil
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Abstract
The invention discloses an external magnetic field enhanced electromagnetic track accelerating device and an implementation method thereof.A PFN pulse forming network is adopted to provide instantaneous heavy current for two magnetic field coils, a background strong magnetic field is provided in the area where a track and an armature between the two coils are positioned, when the background strong magnetic field reaches the peak value, the other PFN pulse forming network starts to provide instantaneous heavy current for the track and the armature, and the armature with the current is acted by the action of Lorentz force in the background strong magnetic field and a self-magnetic field, so that the movement to a muzzle is accelerated. The invention improves the acceleration efficiency of the electromagnetic orbital cannon by applying a stable background strong magnetic field of hundreds of mu s to several ms, and compared with the conventional electromagnetic orbital cannon, the invention can reduce the pulse current flowing in the orbit and reduce the ablation of the armature and the orbit under the condition of certain projectile launching speed, thereby achieving the purposes of prolonging the service life of the orbit and stabilizing the postures of the armature and the projectiles.
Description
Technical Field
The invention belongs to the technical field of electromagnetic emission, and particularly relates to an external magnetic field enhanced electromagnetic track accelerating device and an implementation method thereof.
Background
The electromagnetic rail gun is a novel launching device capable of accelerating the projectile to a plurality of km/s, and the electromagnetic rail gun utilizes strong Lorentz force applied to an armature to push the projectile to move in an accelerated manner so as to convert electromagnetic energy into kinetic energy.
During electromagnetic emission, the armature and the rail will be subjected to high currents (hundreds of kA to MA class), high voltages (kV class), strong magnetic fields (tens of T class), high loads (hundreds of MPa class), high heat (hundreds of GW/m) 2 ) And extreme adverse effects such as high-speed motion (several km/s level); due to the effects of current skin effect and velocity skin effect, the current in the rail gun is substantially distributed in thin layers near the surface of the conductor and tends to concentrate at the corners of the structure. The current build-up can cause local joule heating effects to be significant, causing melting or vaporization of the rail surface, i.e., rail ablation occurs. And in the process of launching the armature by the electromagnetic rail gun, the guide rail pair generates mutually repulsive acting force due to the fact that reverse pulse large current flows. With the continuous forward sliding of the armature, the transverse deflection deformation similar to a beam is generated on the guide rail, so that the corresponding deformation of the fastening part is caused, and the supporting strength is reduced. Thus severely reducing the service life of the track, the launch performance of the projectile and the efficiency of the device. Therefore, how to reduce rail ablation and improve the service life of the rail is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide an external magnetic field enhanced electromagnetic track accelerating device and an implementation method thereof, aiming at the deficiencies in the prior art, and solving the technical problems of serious track ablation, low track service life and unstable projectile launching performance in the prior electromagnetic track gun technology.
The invention adopts the following technical scheme:
an external magnetic field enhanced electromagnetic track accelerating device comprises a track, wherein an armature is arranged on the track and connected with a projectile, and the track is sequentially connected with a second PFN pulse forming network and a charger in parallel; the track is arranged between the first magnetic field coil and the second magnetic field coil, and two ends of the first magnetic field coil and two ends of the second magnetic field coil are respectively connected with the first PFN pulse forming network and the charger in parallel.
Specifically, the first magnetic field coil and the second magnetic field coil are rectangular coils and are arranged on two sides of the track in a laminated structure.
Further, the total inductance of the first magnetic field coil and the second magnetic field coil is 1-10 muH.
Further, the first magnetic field coil and the second magnetic field coil respectively comprise a plurality of coils, and are sequentially arranged on two sides of the track.
Further, the plurality of first magnetic field coils and the plurality of second magnetic field coils are connected in parallel, respectively.
Specifically, a first leading-in end of the first magnetic field coil is connected with a first leading-out end of the first magnetic field coil through a first gas switch and a first PFN pulse forming network; and the second leading-in end of the second magnetic field coil is connected with the second leading-out end of the second magnetic field coil through the first gas switch and the first PFN pulse forming network.
Specifically, the first PFN pulse forming network and the second PFN pulse forming network are respectively formed by connecting a plurality of capacitors in parallel.
Furthermore, the total capacitance of the first PFN pulse forming network is 1-10 mF, and the total capacitance of the second PFN pulse forming network is 1-10 mF.
Specifically, the track is of a rectangular plate-shaped structure and comprises two monorail bodies which are arranged in parallel, the two monorail bodies are located between the first magnetic field coil and the second magnetic field coil, and the two monorail bodies and the second PFN pulse form a network connection through an armature to form a loop.
Another technical solution of the present invention is an implementation method of an external magnetic field enhanced electromagnetic track accelerator, comprising the following steps:
s1, controlling the charging voltage of a charger to be 5-15 kV, and respectively charging a first PFN pulse forming network and a second PFN pulse forming network;
s2, after the charging in the step S1 is finished, firstly applying a trigger signal to enable a first PFN pulse forming network to discharge a first magnetic field coil and a second magnetic field coil, and generating a magnetic field in an armature and track area;
and S3, when the discharging current of the first PFN pulse forming network reaches the flat top moment in the step S2, applying a trigger signal to enable the second PFN pulse forming network to discharge to the armature and the track to generate a stable background strong magnetic field of 100 mu S-2 ms, wherein the magnetic flux density of the stable background strong magnetic field is 5T, the armature is accelerated to move towards the muzzle under the action of magnetic field force in the background strong magnetic field and the self-magnetic field, and the moving speed of the armature is 100-2000 m/S.
Compared with the prior art, the invention has at least the following beneficial effects:
the invention relates to an external magnetic field enhanced electromagnetic track accelerating device, which accelerates the movement of an armature by utilizing a strong magnetic field generated by a coil and an auto magnetic field generated by track current, wherein when a charger finishes charging a first PFN pulse forming network and a second PFN pulse forming network, a switch of the first PFN pulse forming network is firstly closed, and square wave pulse current is generated by two magnetic field coils which are positioned at two sides of a track and connected in parallel, so that a square wave pulse magnetic field is generated; when the discharge current of the first PFN pulse forming network enters the flat top moment, the switch of the second PFN pulse forming network is closed, the second PFN pulse forming network discharges to the track and the armature, the current flowing through the track and the armature is vertical to the direction of the magnetic field, and the armature is acted by an electromagnetic force under the action of the background strong magnetic field and the self-magnetic field, so that the armature accelerates to the muzzle.
Furthermore, the first magnetic field coil and the second magnetic field coil are rectangular coils, and the generated magnetic field is in a rectangular area and is in accordance with the shape of the armature moving area. And the magnetic field coils are arranged on two sides of the track in a laminated structure, the mechanical strength of the coils is enhanced by the laminated structure, and the two magnetic field coils are arranged on two sides of the track in a split manner, so that the magnetic field is favorably concentrated in a rectangular area between the two magnetic field coils.
Furthermore, the total inductance of the magnetic field coil is 1-10 muH, the selection of the inductance value should be matched with the capacitance value, the duration time of the background strong magnetic field is adjusted by changing the inductance value and the capacitance value, and the time of the generated background strong magnetic field is not too long or too short. If the inductance value is too small, the duration time of the background magnetic field is short, and the armature movement time is reduced; if the inductance value is too large, the current in the coil is reduced, the magnetic field intensity of the background magnetic field is reduced, and the armature is insufficiently stressed.
Furthermore, first magnetic field coil and second magnetic field coil include a plurality ofly respectively, because the moving distance of armature on the track is longer, when adopting a pair of first magnetic field coil and second magnetic field coil, the strong magnetic field of background that produces is regional less, and the armature breaks away from the scope of the strong magnetic field of background in the motion process, will no longer receive the effect of stress, is unfavorable for the armature to produce high motion. A plurality of first magnetic field coils and a plurality of second magnetic field coils are sequentially arranged on two sides of the track, and the armature enters the next high-intensity magnetic field area to continuously accelerate after being separated from the previous high-intensity magnetic field area, so that the armature is gradually accelerated in the sequentially arranged magnetic field coils.
Furthermore, the plurality of first magnetic field coils and the plurality of second magnetic field coils are respectively connected in parallel, the plurality of first magnetic field coils have the same parameter and the same inductance value, and the plurality of second magnetic field coils have the same parameter and the same inductance value. The coils with the same parameters and inductance values are connected in parallel, and the current flowing through each coil is the same, so that the background strong magnetic fields generated by each coil in the armature track area are consistent in size, and the speed stability of the armature in the motion process is ensured.
Furthermore, the first leading-in end is connected with the first leading-out end through a first gas switch and a first PFN pulse forming network; the second leading-in end is connected with the second leading-out end through a first gas switch and a first PFN pulse forming network to form an integral circuit loop, after the gas switch is conducted, current flows through the circuit, and the magnetic field coil generates a strong magnetic field.
Furthermore, the PFN pulse forming network is formed by connecting a plurality of capacitors in parallel, and the total capacitance of the capacitors connected in parallel is the sum of the capacitance values of all the single capacitors, so that the capacitance of the capacitors is conveniently expanded.
Furthermore, the total capacitance of the first PFN pulse forming network is 1-10 mF, the total capacitance of the second PFN pulse forming network is 1-10 mF, the capacitance influences the current magnitude and the current duration flowing through the field coil and the armature, and the movement speed of the armature can be finally adjusted by selecting the appropriate capacitance.
Furthermore, the track is rectangular plate-shaped structure, including two single tracks of parallel arrangement, two single tracks are located between first magnetic field coil and the second magnetic field coil, and the armature is located between two single tracks, and two single tracks have restricted the direction of motion of armature, make the armature can be along the regional continuous motion of strong magnetic field. The two single rails simultaneously play a role in forming a circuit loop, and the armature and the second PFN pulse form network connection to form the circuit loop.
After charging, firstly applying a trigger signal to enable a first PFN pulse forming network to discharge a first magnetic field coil and a second magnetic field coil, generating a magnetic field in an armature and track area, and applying the trigger signal when the discharge current of the first PFN pulse forming network reaches the flat-top moment to enable a second PFN pulse forming network to discharge the armature and the track, so as to accelerate the armature to enable the armature to move. The first pulse forming network and the second pulse forming network cooperate in time to achieve an optimal armature acceleration effect.
In conclusion, the invention realizes the acceleration of the electromagnetic track through the external magnetic field, and can reduce the ablation of the armature and the track and prolong the service life of the track by controlling and reducing the pulse current flowing in the track. The movement speed of the armature in the track can be regulated and controlled by changing the charging voltage of the circuit, and the controllability of the track accelerating device is improved.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic diagram of a circuit configuration in which a first PFN pulse forming network discharges to a magnetic field coil;
FIG. 2 is a schematic diagram of a circuit configuration for discharging the second PFN pulse forming network to the rail pair and the armature;
fig. 3 is a schematic diagram of a circuit structure for providing a strong background magnetic field to the magnetic field coil when the track is too long.
Wherein: 1. a charger; 2. a first PFN pulse forming network; 3. a first gas switch; 4. a first magnetic field coil; 40. a second magnetic field coil; 41. a first lead-in end; 42. a first lead-out terminal; 43. a second lead-in end; 44. a second leading-out terminal; 5. an armature; 6. a track; 7. a pill; 8. a second PFN pulse forming network; 9. a second gas switch.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "one side", "one end", "one side", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
Various structural schematics according to the disclosed embodiments of the invention are shown in the drawings. The figures are not drawn to scale, wherein certain details are exaggerated and some details may be omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
The invention provides an external magnetic field enhanced electromagnetic track accelerating device and an implementation method thereof.A PFN pulse forming network is adopted to provide instantaneous large current for two magnetic field coils, a background strong magnetic field is provided in the area where a track and an armature between the two coils are positioned, when the background strong magnetic field reaches the peak value, the other PFN pulse forming network starts to provide instantaneous large current for the track and the armature, and the armature with the current is acted by the action of Lorentz force in the background strong magnetic field and a self-magnetic field, so that the movement to a muzzle is accelerated. The invention improves the acceleration efficiency of the electromagnetic orbital cannon by applying a stable background strong magnetic field (more than 5T) within a certain time range (hundreds of mu s to several ms), and compared with the conventional electromagnetic orbital cannon, the invention can reduce the pulse current flowing in the orbit and reduce the ablation of the armature and the orbit under the condition of a certain projectile launching speed, thereby achieving the purposes of prolonging the service life of the orbit and stabilizing the postures of the armature and the projectile.
Referring to fig. 1, the external magnetic field enhanced electromagnetic track accelerating device of the present invention includes a charger 1, a first PFN pulse forming network 2, a first gas switch 3, a first magnetic field coil 4, a second magnetic field coil 40, a first lead-in 41, a first lead-out 42, a second lead-in 43, a second lead-out 44, an armature 5, a track 6, a pellet 7, a second PFN pulse forming network 8, and a second gas switch 9.
The two ends of the first magnetic field coil 4 and the second magnetic field coil 40 are connected with a first PFN pulse forming network 2 and a charger 1 in parallel, the charger 1 is connected with a second PFN pulse forming network 8 and a track 6 in parallel, the track 6 is arranged between the first magnetic field coil 4 and the second magnetic field coil 40, an armature 5 is arranged on the track 6, and the armature 5 is connected with a bullet 7; the first PFN pulse forming network 2 and the second PFN pulse forming network 8 are powered by the charger 1, two discharging loops are formed respectively and used for generating a strong background magnetic field and track current, the first PFN pulse forming network 2 is connected with the first magnetic field coil 4 and the second magnetic field coil 40, the strong background magnetic field is provided in the track 6 area, and the armature 5 can be subjected to larger Lorentz force in an acceleration stage.
A second PFN pulse forming network 8 is connected in parallel at both ends of the track 6, and a second gas switch 9 is provided between one end of the track 6 and the second PFN pulse forming network 8, the track 6 functioning to conduct current and guide the armature 5 and the projectile 7.
The first magnetic field coil 4 and the second magnetic field coil 40 are connected in parallel, have a total inductance of 1 to 10 μ H, and are connected to the first PFN pulse forming network 2 through a first lead-in 41, a first lead-out 42, a second lead-in 43, and a second lead-out 44.
The first input 41 of the first magnetic field coil 4 is connected to the first output 42 of the first magnetic field coil 4 via the first gas switch 3 and the first PFN pulse forming network 2.
A second input 43 of the second magnetic field coil 40 is connected to a second output 44 of the second magnetic field coil 40 via the first gas switch 3 and the first PFN pulse forming network 2.
The first magnetic field coil 4 and the second magnetic field coil 40 are rectangular coils, and are arranged on two sides of the track 6 in a laminated structure.
The first PFN pulse forming network 2 is connected in parallel through a plurality of capacitors to form a PFN circuit structure, the total capacitance is 1-10 mF, and the PFN circuit can generate square wave current.
The charger 1 supplies power to the first PFN pulse forming network 2, the charging voltage is 5-15 kV, after the charging is finished, the first gas switch 3 is closed, the first magnetic field coil 4 and the second magnetic field coil 40 discharge through the first PFN pulse forming network 2, and a strong magnetic field which is perpendicular to the track current direction and is in a certain time range (hundreds of microseconds to several milliseconds) is generated.
The track 6 has a rectangular plate-like structure, includes two parallel magnetic field coils, is located between the first magnetic field coil 4 and the second magnetic field coil 40, and is connected to the second PFN pulse forming network 8 through the armature 5 to form a loop.
Referring to fig. 2, the second discharging loop structure includes a charger 1, a second PFN pulse forming network 8, a second gas switch 9, an armature 5, a track 6, and a pellet 7.
The second PFN pulse forming network 8 is connected in parallel through a plurality of capacitors, each stage of capacitors are connected through an inductor, the total capacitance is 1-10 mF, the output current waveform of the PFN pulse forming network is adjusted by adjusting the interstage inductance value of each stage of capacitors, the flat top time of the current flowing through the track 6 and the armature 5 is shorter than that of the square wave current generated by the first PFN pulse forming network 2, and the constant strong magnetic field effect is ensured in the process that the current flows through the armature 5 and the track 6. The charger 1 supplies power to the second PFN pulse forming network 8, the charging voltage is 5-15 kV, after the charging is finished, the second gas switch 9 is closed, the second PFN pulse forming network 8 discharges through the track 6 and the armature 5 to generate current perpendicular to the direction of magnetic lines of force of the background strong magnetic field, and the armature 5 with the current is acted by force in the background strong magnetic field and the self-magnetic field, so that the armature moves towards the muzzle in an accelerated manner.
Referring to fig. 3, if the length of the track 6 is too long, the plurality of pairs of first and second magnetic field coils 4 and 40 are arranged to provide a background magnetic field, and at this time, the plurality of pairs of first and second magnetic field coils 4 and 40 are discharged in a time-sharing manner by using the plurality of groups of first PFN pulse forming networks 2, so that the track 6 and the armature 5 are completely in the background strong magnetic field, and the armature 5 can be subjected to a larger lorentz force in an acceleration stage.
The accelerating device of the external magnetic field enhanced electromagnetic rail gun can be used for accelerating a solid armature, a plasma armature and a plurality of pairs of coils to provide a background strong magnetic field.
The method for accelerating the solid armature by using the external magnetic field enhanced electromagnetic rail gun accelerating device comprises the following specific steps:
s101, building an external magnetic field enhanced electromagnetic rail gun accelerating device;
the first field coil 4 and the second field coil 40 are positioned on two sides of the rail 6 and the solid armature 5, so that the solid armature 5 and the rail 6 are ensured to be in a constant magnetic field generated by the first field coil 4 and the second field coil 40 in the experimental process.
S102, connecting a circuit;
in the circuit configuration, the first magnetic field coil 4 and the second magnetic field coil 40 are connected in parallel, and form a discharge circuit together with the first PFN pulse forming network 2 and the first gas switch 3. The solid armature 5 and the track 6 are connected with a second PFN pulse forming network 8 and a second gas switch 9 through leads to form another discharge loop.
And S103, PFN pulse forming network charging and electromagnetic orbit shot launching.
The charging voltage of a charger 1 is respectively set to be 5-15 kV to charge a first PFN pulse forming network 2 and a second PFN pulse forming network 8, after the charging is finished, a trigger signal is firstly applied to close a first gas switch 3, so that the first PFN pulse forming network 2 discharges a first magnetic field coil 4 and a second magnetic field coil 40, and a magnetic field is generated in the area of a solid armature 5 and a track 6; when the discharging current of the first PFN pulse forming network 2 reaches the flat-top moment, a trigger signal is applied to enable the second gas switch 9 to be conducted, the second PFN pulse forming network 8 discharges the solid armature 5 and the track 6 to generate a stable background strong magnetic field of 100 mu s, the magnetic flux density of the stable background strong magnetic field is 5T, the solid armature 5 with the current is acted by the magnetic force in the background strong magnetic field and the self-magnetic field to accelerate to move to the muzzle, and the moving speed of the armature is 100m/s.
The specific steps of accelerating the plasma armature by using the external magnetic field enhanced electromagnetic orbit gun accelerating device are as follows:
s201, building an external magnetic field enhanced electromagnetic rail gun accelerating device;
the first magnetic field coil 4 and the second magnetic field coil 40 are positioned on two sides of the track 6 and the plasma armature 5, so that the plasma armature 5 and the track 6 are ensured to be in a constant magnetic field generated by the first magnetic field coil 4 and the second magnetic field coil 40 in the experimental process.
S202, connecting a circuit;
in the circuit configuration, the first magnetic field coil 4 and the second magnetic field coil 40 are connected in parallel, and form a discharge circuit together with the first PFN pulse forming network 2 and the first gas switch 3. The plasma armature 5 and the track 6 are connected with a second PFN pulse forming network 8 and a second gas switch 9 through leads to form another discharge loop.
And S203, PFN pulse forming network charging and electromagnetic orbit shot launching.
The charging voltage of the charger 1 is set to be 5-15 kV, the first PFN pulse forming network 2 and the second PFN pulse forming network 8 are used for charging, after charging is completed, a trigger signal is applied firstly to close the first gas switch 3, the first PFN pulse forming network 2 discharges to the first magnetic field coil 4 and the second magnetic field coil 40, and magnetic fields are generated in the areas of the plasma armature 5 and the track 6; when the discharge current of the first PFN pulse forming network 2 reaches the flat-top moment, a trigger signal is applied to enable the second gas switch 9 to be conducted, the plasma armature 5 is generated through surface discharge at the moment, the second PFN pulse forming network 8 discharges to the plasma armature 5 and the track 6 to generate a stable background strong magnetic field of 1ms, the magnetic flux density of the stable background strong magnetic field is 5T, the plasma armature 5 is accelerated to move towards a muzzle under the action of the magnetic force in the background strong magnetic field and the self-magnetic field, and the moving speed of the armature is 1000m/s.
The method comprises the following specific steps of using a plurality of pairs of magnetic field coil enhanced electromagnetic rail gun accelerating device:
s301, building an external magnetic field enhanced electromagnetic rail gun accelerating device;
the pairs of first and second magnetic field coils 4 and 40 are located on either side of the rail 6 and the solid armature 5, ensuring that the armature 5 and rail 6 are within the constant magnetic field generated by the pairs of first and second magnetic field coils 4 and 40 during the experiment.
S302, connecting a circuit;
in terms of circuit configuration, a plurality of pairs of first magnetic field coils 4 and second magnetic field coils 40 are connected in parallel, and form a discharge circuit together with the first PFN pulse forming network 2 and the first gas switch 3. The armature 5 and the track 6 are connected with a second PFN pulse forming network 8 and a second gas switch 9 through leads to form another discharge loop.
And S303, PFN pulse forming network charging and electromagnetic orbit shot launching.
The charging voltage of the charger 1 is set to be 5-15 kV to charge the first PFN pulse forming network 2 and the second PFN pulse forming network 8, after charging is completed, a trigger signal is applied to close the first gas switch 3, so that the first PFN pulse forming network 2 discharges a plurality of pairs of first magnetic field coils 4 and second magnetic field coils 40 in a time-sharing sequence, and magnetic fields are generated in the armature 5 and the track 6; when the discharging current of the first PFN pulse forming network 2 for exciting the first pair of coils reaches the flat-top moment, a trigger signal is applied to enable the second gas switch 9 to be conducted, the second PFN pulse forming network 8 discharges the armature 5 and the track 6 to generate a stable background strong magnetic field of 2ms, and the magnetic flux density of the stable background strong magnetic field is 5T; then when the discharging current of the first PFN pulse forming network 2 for exciting the second pair of coils reaches the flat-top moment, the armature just leaves the field of the first pair of coils and enters the field excited by the second pair of strong magnetic field coils, and so on. The armature 5 with current is acted by magnetic force in the background strong magnetic field and the self-magnetic field, and accelerates to move to the muzzle, and the moving speed of the armature is 2000m/s.
The moving speed of the armature can reach hundreds of meters per second to thousands of meters per second under different circuit parameters.
In this embodiment, the first PFN pulse forming network structure is a PFN circuit, and is capable of generating a square wave current, the square wave current flows through the magnetic field coils connected in parallel, a magnetic field perpendicular to the direction of the track current is generated between the two opposite magnetic field coils, and the magnetic field can be maintained for a period of time until the electromagnetic orbital cannon is launched; the second PFN pulse forming network can also generate a square wave current, the square wave current flows through the force load, and the pulse width is shorter than the flat-top duration of the square wave current generated by the first PFN pulse forming network, so that the armature is always in a background strong magnetic field in the acceleration process.
In this embodiment, the second PFN pulse forming network includes, but is not limited to, a square wave through the rail and armature discharge current waveforms, and the adjustment of an arbitrary waveform is realized by changing the connection structure of the PFN pulse forming network.
In summary, according to the external magnetic field enhanced electromagnetic track accelerating device and the implementation method thereof, the accelerating efficiency of the electromagnetic track gun is improved by applying the stable background strong magnetic field (more than 5T) within a certain time range (hundreds of microseconds to several milliseconds), and compared with the conventional electromagnetic track gun, the external magnetic field enhanced electromagnetic track accelerating device can reduce the pulse current flowing in the track and reduce the ablation of the armature and the track under the condition that the projectile launching speed is constant, so that the purposes of prolonging the service life of the track and stabilizing the postures of the armature and the projectile are achieved.
The above contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention should not be limited thereby, and any modification made on the basis of the technical idea proposed by the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. An external magnetic field enhanced electromagnetic track accelerating device is characterized by comprising a track (6), wherein an armature (5) is arranged on the track (6), the armature (5) is connected with a shot (7), and the track (6) is sequentially connected with a second PFN pulse forming network (8) and a charger (1) in parallel;
the track (6) is arranged between the first magnetic field coil (4) and the second magnetic field coil (40), and two ends of the first magnetic field coil (4) and two ends of the second magnetic field coil (40) are respectively connected with the first PFN pulse forming network (2) and the charger (1) in parallel.
2. An external magnetic field enhanced electromagnetic track accelerator according to claim 1, wherein the first magnetic field coil (4) and the second magnetic field coil (40) are rectangular coils arranged on both sides of the track (6) in a laminated structure.
3. An external magnetic field enhanced electromagnetic track accelerator according to claim 2, wherein the total inductance of the first magnetic field coil (4) and the second magnetic field coil (40) is 1-10 μ H.
4. An external magnetic field enhanced electromagnetic track accelerating device as defined in claim 2, wherein the first magnetic field coil (4) and the second magnetic field coil (40) are respectively composed of a plurality of coils, and are sequentially disposed on both sides of the track (6).
5. An external magnetic field enhanced electromagnetic track accelerating device as defined in claim 4, wherein the plurality of first magnetic field coils (4) and the plurality of second magnetic field coils (40) are connected in parallel, respectively.
6. An external magnetic field enhanced electromagnetic track accelerator according to claim 1, characterized in that the first lead-in (41) of the first magnetic field coil (4) is connected to the first lead-out (42) of the first magnetic field coil (4) through the first gas switch (3) and the first PFN pulse forming network (2); a second lead-in terminal (43) of the second magnetic field coil (40) is connected with a second lead-out terminal (44) of the second magnetic field coil (40) through the first gas switch (3) and the first PFN pulse forming network (2).
7. An external magnetic field enhanced electromagnetic track accelerator according to claim 1, wherein the first PFN pulse forming network (2) and the second PFN pulse forming network (8) are respectively composed of a plurality of capacitors connected in parallel.
8. An external magnetic field enhanced electromagnetic orbit acceleration device according to claim 7, characterized in that the total capacitance of the first PFN pulse forming network (2) is 1-10 mF, and the total capacitance of the second PFN pulse forming network (8) is 1-10 mF.
9. An external magnetic field enhanced electromagnetic track accelerating device as defined in claim 1, wherein the track (6) is a rectangular plate structure, and comprises two monorail arranged in parallel, the two monorail are located between the first magnetic field coil (4) and the second magnetic field coil (40), and are connected with the second PFN pulse forming network (8) through the armature (5) to form a loop.
10. An implementation method of an external magnetic field enhanced electromagnetic track accelerating device according to any one of claims 1 to 9, comprising the following steps:
s1, controlling the charging voltage of a charger to be 5-15 kV, and respectively charging a first PFN pulse forming network and a second PFN pulse forming network;
s2, after the charging in the step S1 is finished, firstly applying a trigger signal to enable a first PFN pulse forming network to discharge a first magnetic field coil and a second magnetic field coil, and generating a magnetic field in an armature and track area;
and S3, when the discharging current of the first PFN pulse forming network reaches the flat top moment in the step S2, applying a trigger signal to enable the second PFN pulse forming network to discharge to the armature and the track to generate a stable background strong magnetic field of 100 mu S-2 ms, wherein the magnetic flux density of the stable background strong magnetic field is 5T, the armature is accelerated to move towards the muzzle under the action of magnetic field force in the background strong magnetic field and the self-magnetic field, and the moving speed of the armature is 100-2000 m/S.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116929153A (en) * | 2023-09-04 | 2023-10-24 | 广州国曜科技有限公司 | Novel electromagnetic net catcher and construction method of control circuit thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116929153A (en) * | 2023-09-04 | 2023-10-24 | 广州国曜科技有限公司 | Novel electromagnetic net catcher and construction method of control circuit thereof |
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