CN108387138B - Combined asynchronous induction electromagnetic coil emitter and ignition method thereof - Google Patents
Combined asynchronous induction electromagnetic coil emitter and ignition method thereof Download PDFInfo
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- CN108387138B CN108387138B CN201810124215.2A CN201810124215A CN108387138B CN 108387138 B CN108387138 B CN 108387138B CN 201810124215 A CN201810124215 A CN 201810124215A CN 108387138 B CN108387138 B CN 108387138B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41F—APPARATUS FOR LAUNCHING PROJECTILES OR MISSILES FROM BARRELS, e.g. CANNONS; LAUNCHERS FOR ROCKETS OR TORPEDOES; HARPOON GUNS
- F41F1/00—Launching apparatus for projecting projectiles or missiles from barrels, e.g. cannons; Harpoon guns
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Abstract
the invention discloses a combined asynchronous induction electromagnetic coil emitter and an ignition method thereof, and the combined asynchronous induction electromagnetic coil emitter comprises a plurality of groups of multi-stage coil emitters, a gun barrel and a plurality of connecting pieces, wherein each group of multi-stage coil emitters comprises a multi-stage driving coil group and a corresponding armature; when not triggered, each armature is respectively positioned in the corresponding multi-stage driving coil group; after triggering, each section of multi-stage driving coil provides acting force which is along the axial direction of the gun barrel and is directed to the gun muzzle to the armature in the multi-stage driving coil. The invention can realize the propelling force with different pulse widths, amplitudes and waveforms, avoid armature acceleration faults and further ensure that the acceleration is smoother; meanwhile, the stress, the emission speed and the emission efficiency can be improved; the thrust precision control method is more suitable for occasions with higher requirements on thrust precision.
Description
Technical Field
the invention relates to the technical field of launching of large-mass objects such as missiles and the like, in particular to a combined asynchronous induction electromagnetic coil launcher and an ignition method thereof.
Background
since the velocity of the magnetic field traveling wave required for the acceleration of the projectile is higher and higher, the entire coil should be divided into several segments. To obtain a traveling wave with an increasing speed from one section to another, the frequency of the excitation power should be increased, or the pole pitch (half wavelength) of the drive coil should be increased. The pole pitch is determined by the number of phases, the length of the single-stage drive coils, and the spacing between the single-stage drive coils. The smaller the pole pitch, the more stable the acceleration of the projectile and the greater the acceleration force. But when the polar distance is reduced, the speed of the magnetic travelling wave is reduced proportionally, so that the accelerating effect of the projectile is reduced. In addition, in order to take the transmitting efficiency and the transmitting speed into consideration, the length of the emitter is generally one polar distance, and in practical application, the length of the emitter is also shorter, so that the overlarge polar distance is not practical, and the power supply frequency is more suitable for increasing along the length of the gun barrel. One frequency may be used per segment, only up-converting segment by segment. Therefore, different excitation frequencies are required for each section of the asynchronous induction coil gun.
Due to different stress requirements of different loads, the amplitude, pulse width and waveform of the propelling force obtained by the independent multistage synchronous induction coil transmitter are very limited, and different stress load requirements are difficult to meet.
for example, the acceleration characteristic is a very important limiting condition for some sensitive loads (such as missiles and the like), and the smooth acceleration force is beneficial to the structural design of load components. And because the principle of the coil emitter is that the multi-stage coils are driven step by step, the generated electromagnetic thrust has certain fluctuation, and the requirement of some load jitter is difficult to meet.
In summary, the following problems commonly exist in the existing coil transmitters:
(1) The travelling speed of the magnetic field required by the acceleration of the projectile is higher and higher, and the launching efficiency and the launching speed cannot be considered at the same time;
(2) the high-power driving coil is easy to damage;
(3) The acceleration force of the armature of the coil emitter in the acceleration process is not smooth and stable enough;
(4) The propulsion of different pulse widths, amplitudes and waveforms is difficult to realize by means of a single group of synchronous induction coil transmitters, and the application in the industrial and scientific fields is limited.
disclosure of Invention
The invention aims to provide a combined asynchronous induction electromagnetic coil emitter and an ignition method thereof, wherein the acceleration of the emitter can be smoother, and the emission speed and the emission efficiency can be improved.
The invention relates to a combined asynchronous induction electromagnetic coil emitter, which comprises a plurality of groups of multi-stage coil emitters, a gun barrel and a plurality of connecting pieces, wherein:
Each group of multi-stage coil emitters comprises a multi-stage driving coil group and a corresponding armature, the multi-stage driving coil group comprises two sections of multi-stage driving coils which are not electrically connected, and each section of multi-stage driving coil is electrified with alternating current;
Each section of multi-stage driving coil is sequentially wound outside the gun barrel along the axial direction of the gun barrel, wherein two sections of multi-stage driving coils belonging to the same group of multi-stage driving coil groups are adjacent; all armatures are sequentially arranged in the gun barrel along the axial direction of the gun barrel, and adjacent armatures are connected through a connecting piece;
When the trigger is not triggered, the armatures are respectively positioned in a first section of multi-stage driving coils in the corresponding multi-stage driving coil groups, and the first section of multi-stage driving coils are sections of multi-stage driving coils close to the bottom of the gun barrel in each multi-stage driving coil group;
after triggering, each section of multi-stage driving coil provides acting force which is along the axial direction of the gun barrel and is directed to the gun muzzle to the armature in the multi-stage driving coil.
Preferably, in each multi-stage drive coil group, the stage number of one multi-stage drive coil close to the gun barrel muzzle is not less than that of the other multi-stage drive coil.
Furthermore, the stage number of each section of multi-stage driving coil is a multiple of 6, and each stage of driving coil in each section of multi-stage driving coil adopts a connection mode of firstly connecting in series and then connecting in parallel.
furthermore, in each multi-stage drive coil group, the coil parameters of one section of multi-stage drive coil close to the gun muzzle are the same, and the coil parameters of the other section of multi-stage drive coil far away from the gun muzzle are the same.
further, the armature is a metal cylinder or a coil.
Further, the connecting piece is a metal rod or a launching body.
Preferably, the specific relative positions of each armature and the corresponding first-stage multi-stage driving coil are as follows:
The bottom of the armature closest to the bottom of the gun barrel is flush with the middle section of the first-stage driving coil in the corresponding first-stage multi-stage driving coil;
the bottom of the other armatures except the armature closest to the bottom of the gun barrel is positioned below the middle section of the first-stage driving coil in the corresponding first-stage multi-stage driving coil, but is not lower than the middle section of the adjacent first-stage driving coil below the first-stage driving coil.
the ignition method of the combined asynchronous induction electromagnetic coil transmitter provided by the invention comprises the following steps:
Marking one section of multi-stage drive coil close to the bottom of the gun barrel in each group of multi-stage drive coil groups as a first section of multi-stage drive coil, and marking the other section of multi-stage drive coil as a second section of multi-stage drive coil;
The trigger time sequence of each section of the multi-stage drive coil is as follows:
Firstly, sequentially triggering a first section of multi-stage driving coils in each group of multi-stage driving coil groups from a first section of multi-stage driving coils closest to the bottom of a gun barrel along the direction from the bottom of the gun barrel to the muzzle of the gun barrel;
then, the second multi-stage driving coils in each group of multi-stage driving coil groups are sequentially triggered from the second multi-stage driving coil closest to the bottom of the gun barrel along the direction from the bottom of the gun barrel to the muzzle of the gun barrel.
Further, the triggering time sequence of each section of the multi-stage driving coil is realized by controlling the triggering time by using a time delay device.
compared with the prior art, the invention has the following advantages and beneficial effects:
(1) The multiple groups of multi-stage coil emitters are subjected to cross ignition, and the same armature is superposed by different electromagnetic forces, so that propelling forces with different pulse widths, amplitudes and waveforms can be realized; by adjusting the trigger time sequence, the armature acceleration fault can be avoided, so that the acceleration can be smoother; meanwhile, the stress, the emission speed and the emission efficiency can be improved; the thrust precision control method is more suitable for occasions with higher requirements on thrust precision.
(2) the stress of the driving coils can be dispersed into a plurality of groups of multi-stage coil emitters, so that the electromagnetic force borne by each driving coil is dispersed, and the driving coils are not easy to damage.
Drawings
fig. 1 is a schematic diagram of a combined asynchronous induction electromagnetic coil transmitter in an embodiment;
figure 2 is a schematic diagram of the relative positions of an armature and a corresponding multi-stage drive coil set in an embodiment;
FIG. 3 is a two-dimensional axisymmetric simulation model of the combined asynchronous induction solenoid transmitter of FIG. 1;
FIG. 4 is an external control circuit diagram of a first plurality of multi-stage drive coil assemblies in accordance with one embodiment;
FIG. 5 is a graph comparing force waveforms for cross-ignition and simultaneous ignition of the combined asynchronous induction electromagnetic coil transmitter of the embodiment;
FIG. 6 is a comparison graph of velocity waveforms for cross-ignition and simultaneous ignition of the combined asynchronous induction solenoid transmitter of an embodiment.
throughout the drawings, like reference numerals refer to like structures or elements, wherein:
110 a-a first stage of multi-level drive coils, 111 a-a first stage of drive coils, 120 a-a second stage of multi-level drive coils, 110 b-a first stage of multi-level drive coils, 111 b-a first stage of drive coils, 120 b-a second stage of multi-level drive coils;
2-gun barrel;
310-a first armature, 320-a second armature;
4-connecting piece.
Detailed Description
In order to more clearly illustrate the present invention and/or the technical solutions in the prior art, the following will describe embodiments of the present invention with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
It should be noted that, unless otherwise specified, the circumferential direction, the radial direction, and the axial direction all refer to the circumferential direction, the radial direction, and the axial direction of the gun barrel, and also refer to the circumferential direction, the radial direction, and the axial direction of the armature; the central symmetry axis refers to the central symmetry axis of the gun barrel and is also the central symmetry axis of the armature.
Referring to fig. 1 and 3, in the present embodiment, the combined type asynchronous induction electromagnetic coil transmitter includes two sets of multi-stage coil transmitters, a gun barrel 2 and a connecting member 4; each group of multi-stage coil transmitters comprises a multi-stage driving coil group and a corresponding armature, and the multi-stage driving coil group is used for providing acting force to the armature along the axial direction; the multi-stage drive coil group comprises two multi-stage drive coils without electric connection, and generally, in each multi-stage drive coil group, the stage number of one multi-stage drive coil close to the muzzle of the gun barrel 2 is larger than or equal to that of the other multi-stage drive coil. Each group of multi-stage driving coil groups are sequentially wound outside the gun barrel 2 along the axial direction, each armature is sequentially arranged in the gun barrel 2 along the axial direction, adjacent armatures are connected through a connecting piece 4, and the connecting pieces 4 are used for transmitting kinetic energy. The armature can be a cylindrical object made of copper, aluminum and the like, and can also adopt a coil; the connecting member 4 may be a metal rod or the projectile itself.
for convenience of description, four sections of multi-stage driving coils included in the gun barrel 2 in the direction from the bottom of the gun barrel 2 to the muzzle of the gun barrel 2 are sequentially referred to as a first section of multi-stage driving coil 110a, a second section of multi-stage driving coil 120a, a first section of multi-stage driving coil 110b and a second section of multi-stage driving coil 120b, wherein the first section of multi-stage driving coil 110a and the second section of multi-stage driving coil 120a form a first group of multi-stage driving coil group, the first section of multi-stage driving coil 110b and the second section of multi-stage driving coil 120b form a second group of multi-stage driving coil group, the coil parameters of the first section of multi-stage driving coil 110a and the first section of multi-stage. Similarly, the armatures included in the gun barrel 2 in the direction from the bottom of the gun barrel 2 toward the muzzle of the gun barrel 2 are referred to as a first armature 310 and a second armature 320 in this order.
in this specific embodiment, the first-stage multi-stage driving coil 110a and the first-stage multi-stage driving coil 110b are both 21.3cm long and each include six-stage driving coils, each stage of driving coil has 10 turns, and is wound into two layers, the radial thickness of the driving coil is 1.35cm, the inner radius is 4.1cm, the axial length is 2.55cm, the capacitance values of the three driving capacitors are all 1500 μ F, and the initial voltages are all 3 kV. The second multi-stage driving coil 120a and the second multi-stage driving coil 120b are both 42.6cm long and both comprise twelve driving coils, the coil parameters of each driving coil are the same as those of the first multi-stage driving coil 110a and the first multi-stage driving coil 110b, the capacitance values of the three driving capacitors are all 1125 muF, and the initial voltage is 4 kV.
In the present embodiment, the connecting member 4 is a projectile body, 20cm long, 2.25mm thick in the radial direction, 3.6cm in inner radius, made of aluminum material, and 300g in weight. The mass of the first armature 310 and the second armature 320 are both 300g, and the first armature 310 and the second armature 320 are connected by a projectile and can keep the movement consistent. Considering that the connecting member 4 is the projectile itself, the mass of the entire projectile is set to 600 g.
In an un-triggered static state, each armature is respectively positioned in a first section of multi-stage driving coil in a corresponding multi-stage driving coil group, in the invention, one section of multi-stage driving coil close to the bottom of a gun barrel in each group of multi-stage driving coil group is marked as a first section of multi-stage driving coil, and the other section of multi-stage driving coil is marked as a second section of multi-stage driving coil; the optimal phase positions of the armature and the first stage of multi-stage drive coils can be determined by repeated experiments. The present embodiment provides the best relative positions of the armatures and the first multi-stage drive coils, specifically referring to fig. 2, that is, the bottom of the first armature 310 is flush with the middle section of the first drive coil 111a in the first multi-stage drive coil 110a, and the bottom of the second armature 320 is located below the middle section of the first drive coil 111b in the first multi-stage drive coil 110b, but should not be lower than the middle section of the adjacent drive coil below the first drive coil 111b, where the adjacent drive coil below the first drive coil 111b refers to the last drive coil of the second multi-stage drive coil 120 a. When the number of groups of the multi-stage drive coil groups exceeds 2 groups, the relative positions of the other armatures and the corresponding multi-stage drive coil groups are the same as the second armature 320 except for the lowermost armature.
In the present invention, each stage of driving coils in each stage of multi-stage driving coils adopts a conventional connection manner of first connecting in series and then connecting in parallel and a conventional trigger timing sequence, and a specific connection manner of first connecting in series and then connecting in parallel and a trigger timing sequence are provided below with reference to fig. 4, but not limited thereto. Fig. 4 is a circuit diagram illustrating an external control circuit for a first multi-stage drive coil assembly in accordance with an embodiment, where (a) - (c) in fig. 4 show the external control circuit for the first multi-stage drive coil 110a in the first multi-stage drive coil assembly, and it can be seen from the figure that the drive coils of the respective stages in the first multi-stage drive coil 110a are connected in the following manner: the first-stage driving coil and the fourth-stage driving coil are connected in series, the second-stage driving coil and the fifth-stage driving coil are connected in series, the third-stage driving coil and the sixth-stage driving coil are connected in series, obtained series branches are respectively marked as a branch A, a branch B and a branch C, the branch B and the branch C are also connected in series with a delayer, and the delayer is used for controlling the trigger time of each branch. In this embodiment, the triggering timings of the driving coils at different levels in the first-stage multi-stage driving coil 110a are, in order, branch a, branch C, and branch B.
fig. 4 (d) to (f) show an external circuit for controlling the second-stage multi-stage driving coils 120a in the first-stage multi-stage driving coil group, and in the present embodiment, the second-stage multi-stage driving coils 120a include twelve stages of driving coils, which are sequentially referred to as a seventh-stage driving coil, an eighth-stage driving coil, an … … seventeenth-stage driving coil, and an eighteenth-stage driving coil. As can be seen from the figure, the drive coils of the respective stages in the second stage of the multi-stage drive coils 120a are connected in series and then in parallel, that is: connecting a seventh-stage drive coil and a tenth-stage drive coil in series, connecting a thirteenth-stage drive coil and a sixteenth-stage drive coil in series and then in parallel, and then connecting a delayer in series, wherein the obtained series branch is marked as a branch A'; connecting the eighth-stage drive coil and the eleventh-stage drive coil in series, connecting the fourteenth-stage drive coil and the seventeenth-stage drive coil in series and then in parallel, and then connecting a delayer in series, wherein the obtained series branch is marked as a branch B'; and connecting the ninth-stage driving coil and the twelfth-stage driving coil in series, connecting the fifteenth-stage driving coil and the eighteenth-stage driving coil in series and then in parallel, and then connecting a delayer in series, wherein the obtained series branch is marked as a branch C'. The trigger timing sequence of each stage of driving coil in the second stage of multi-stage driving coil 120 is also branch A ', branch C ' and branch B ' in turn. Since there is a capacitor in the external control circuit of the multi-stage driving coil, and the capacitor discharges with a time delay, the trigger time should be advanced.
the combined asynchronous induction electromagnetic coil emitter utilizes a Faraday electromagnetic induction principle and a Lorentz force principle, and has the following basic working principle: after the drive coil is electrified, the pulse power supply loads the stored electromagnetic energy to the drive coil in a millisecond-level short time, current in the drive coil generates a transient magnetic field inside the gun barrel, the transient magnetic field induces eddy current mainly comprising circumferential components in the armature, the radial components of the transient magnetic field interact with the eddy current, the lorentz force borne by the armature mainly comprises axial components, and the lorentz force pushes the armature and the emitter in the muzzle direction of the gun barrel. When the armature reaches a proper position, the next-stage driving coil is triggered to provide thrust for the armature in the same way, and the armature is prevented from being pulled in the opposite direction; until the projectile is fired from the muzzle. Based on the working principle, a larger muzzle speed can be obtained by increasing the number of the driving coil stages.
in order to make efficient use of the projectile material, the force on the projectile must be maximized and the force waveform homogenized in order to maximize the average acceleration of the projectile. Therefore, the present embodiment further provides a cross-ignition method capable of further increasing the force applied to the emitter and making the acceleration of the emitter more continuous and smooth, that is, the triggering sequence of each section of the multi-stage driving coils is as follows: a first stage multi-stage drive coil 110a, a first stage multi-stage drive coil 110b, a second stage multi-stage drive coil 120a, and a second stage multi-stage drive coil 120 b. The triggering sequence is controlled by controlling the triggering time of each section of multi-stage driving coil. In the triggering sequence, the movement process of the armature is as follows: the first stage of multi-stage driving coils 110a triggered firstly accelerates the first armature 310, and the first armature 310 drives the second armature 320 to move through the connecting piece 4; the second armature 320 is then accelerated by the activated first stage multi-stage drive coil 110 b; then the second section of the multi-stage driving coil 120a which is triggered accelerates the first armature 310; finally, the second multi-stage driving coil 120b is triggered to accelerate the second armature 320. The superposition of the stressed waveforms of the armature on each section of the multistage driving coils can avoid the large interval of the armature stress, thereby ensuring the continuous and smooth acceleration force.
In the invention, the triggering position and the triggering time of the armature are empirical values and can be determined through repeated experiments. Specifically, the optimal trigger position may be determined as follows: the armatures are respectively arranged at different positions of the gun barrel area corresponding to the first section of the multi-stage driving coil 110a, the different positions are respectively used as trigger positions, only the first section of the multi-stage driving coil 110a is triggered, and the launching velocity of the armatures at different trigger positions is obtained through simulation calculation or actual measurement, so that a relation curve between the trigger positions and the launching velocity is drawn. And selecting trigger positions corresponding to the transmitting speed larger than a preset value, and analyzing the stress of the armature at the trigger positions to obtain a stress waveform. The trigger position with the most uniform stress waveform is selected as the optimal trigger position corresponding to the first multi-stage driving coil 110 a.
Specifically, the optimal trigger time may be determined as follows: keeping the trigger position of the armature unchanged, changing the trigger time of the first-stage multi-stage drive coil 110b, triggering only the first-stage multi-stage drive coil 110a and the first-stage multi-stage drive coil 110b, respectively carrying out analog calculation or actual measurement under each trigger time, and obtaining the emission speeds of the armature corresponding to different trigger times, thereby depicting the relationship curve of the trigger time and the emission speed. And selecting the trigger time corresponding to the transmitting speed greater than the preset value, and analyzing the stress of the position of the armature at the trigger time to obtain a stress waveform. The trigger time corresponding to the most uniform force waveform is the optimal trigger time for the first stage of multi-stage driving coils 110 b.
The optimal trigger times for the second segment of multi-level drive coils 120a and the second segment of multi-level drive coils 120b are determined using this method. The difference is that when the optimal triggering time of the second multi-stage driving coil 120a is determined, the first multi-stage driving coil 110a, the first multi-stage driving coil 110b and the second multi-stage driving coil 120a need to be triggered according to the sequence of cross-ignition, the triggering time of the first multi-stage driving coil 110a and the first multi-stage driving coil 110b is fixed, and the triggering time of the second multi-stage driving coil 120a is changed. When the optimal triggering time of the second multi-stage driving coil 120b is determined, the first multi-stage driving coil 110a, the first multi-stage driving coil 110b, the second multi-stage driving coil 120a and the second multi-stage driving coil 120b need to be triggered according to the sequence of cross-ignition, the triggering time of the first multi-stage driving coil 110a, the first multi-stage driving coil 110b and the second multi-stage driving coil 120a is fixed, and the triggering time of the second multi-stage driving coil 120a is changed.
in order to verify the technical effect of the cross ignition method, the embodiment respectively uses two ignition modes of cross ignition and simultaneous ignition for the combined asynchronous induction electromagnetic coil transmitter, and compares the technical effects of the two ignition modes. The simultaneous ignition is: first, the first-stage multi-stage driving coil 110a and the first-stage multi-stage driving coil 110b are triggered simultaneously; then, the second-stage multi-stage driving coil 120a and the second-stage multi-stage driving coil 120b are simultaneously activated.
fig. 5-6 are schematic diagrams of stress waveforms and velocity waveforms of the armature under cross ignition and simultaneous ignition, and it can be seen from fig. 5 that under cross ignition, the stress of the armature is relatively stable, the average stress value is 15.88kN, and the standard deviation is 18.62 kN; under the condition of simultaneous ignition, the average stress is 10.42kN, and the standard deviation is 25 kN; therefore, by adopting the cross ignition method, the average stress of the emitter is improved, the relative uniformity is improved, and the length of the gun barrel is effectively utilized. As can be seen from FIG. 6, in the case of cross-firing, the velocity of the armature at the gun barrel exit is 159.4m/s, and the overall efficiency is 8.1%; under the condition of simultaneous ignition, the speed of the armature at the outlet of the gun barrel is less than 100 m/s; thus, the cross-ignition method has higher speed and efficiency.
with the simultaneous firing method, when the armature enters the second multi-stage driving coil 120a from the first multi-stage driving coil 110a, the induced current will generate a reaction force on the armature due to the current induced by the first multi-stage driving coil 110a, so that an acceleration fault occurs. And the cross-fire approach may solve this problem. By adopting the cross ignition method, the acceleration time of the second armature 320 can be advanced, so that the first armature 310 and the second armature 320 interact with each other, the stress peaks and the stress valleys are overlapped, the time that the stress is suddenly reduced to 0 in the acceleration process of the whole armature can be greatly reduced, the acceleration becomes smoother, and the average stress is improved.
it will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. The combined asynchronous induction electromagnetic coil emitter is characterized in that:
Including multistage coil transmitter of a plurality of groups, barrel and a plurality of connecting piece, wherein:
Each group of multi-stage coil emitters comprises a multi-stage driving coil group and a corresponding armature, the multi-stage driving coil group comprises two sections of multi-stage driving coils which are not electrically connected, and each section of multi-stage driving coil is electrified with alternating current;
Each section of multi-stage driving coil is sequentially wound outside the gun barrel along the axial direction of the gun barrel, wherein two sections of multi-stage driving coils belonging to the same group of multi-stage driving coil groups are adjacent; all armatures are sequentially arranged in the gun barrel along the axial direction of the gun barrel, and adjacent armatures are connected through a connecting piece;
When the trigger is not triggered, the armatures are respectively positioned in a first section of multi-stage driving coils in the corresponding multi-stage driving coil groups, and the first section of multi-stage driving coils are sections of multi-stage driving coils close to the bottom of the gun barrel in each multi-stage driving coil group;
After triggering, each section of multi-stage driving coil provides acting force which is along the axial direction of the gun barrel and is directed to the gun muzzle to the armature in the multi-stage driving coil.
2. The combined asynchronous induction electromagnetic coil transmitter of claim 1, characterized in that:
In each multi-stage drive coil group, the stage number of one section of multi-stage drive coil close to the muzzle of the gun barrel is not less than that of the other section of multi-stage drive coil.
3. the combined asynchronous induction electromagnetic coil transmitter of claim 1, characterized in that:
the stage number of each section of multi-stage driving coil is a multiple of 6, and each stage of driving coil in each section of multi-stage driving coil adopts a connection mode of firstly connecting in series and then connecting in parallel.
4. The combined asynchronous induction electromagnetic coil transmitter of claim 1, characterized in that:
in each multi-stage drive coil group, the coil parameters of one section of multi-stage drive coil close to the gun barrel muzzle are the same, and the coil parameters of the other section of multi-stage drive coil far away from the gun barrel muzzle are the same.
5. The combined asynchronous induction electromagnetic coil transmitter of claim 1, characterized in that:
The armature is a metal cylinder or coil.
6. The combined asynchronous induction electromagnetic coil transmitter of claim 1, characterized in that:
the connecting piece is a metal rod or a launching body.
7. the combined asynchronous induction electromagnetic coil transmitter of claim 1, characterized in that:
The specific relative positions of each armature and the corresponding first-stage multi-stage driving coil are as follows:
The bottom of the armature closest to the bottom of the gun barrel is flush with the middle section of the first-stage driving coil in the corresponding first-stage multi-stage driving coil;
The bottom of the other armatures except the armature closest to the bottom of the gun barrel is positioned below the middle section of the first-stage driving coil in the corresponding first-stage multi-stage driving coil, but is not lower than the middle section of the adjacent first-stage driving coil below the first-stage driving coil, and the adjacent first-stage driving coil refers to the last-stage driving coil of the other multi-stage driving coil.
8. The ignition method of the combined asynchronous induction solenoid transmitter of claim 1 wherein:
Marking one section of multi-stage drive coil close to the bottom of the gun barrel in each group of multi-stage drive coil groups as a first section of multi-stage drive coil, and marking the other section of multi-stage drive coil as a second section of multi-stage drive coil;
the trigger time sequence of each section of the multi-stage drive coil is as follows:
Firstly, sequentially triggering a first section of multi-stage driving coils in each group of multi-stage driving coil groups from a first section of multi-stage driving coils closest to the bottom of a gun barrel along the direction from the bottom of the gun barrel to the muzzle of the gun barrel;
then, the second multi-stage driving coils in each group of multi-stage driving coil groups are sequentially triggered from the second multi-stage driving coil closest to the bottom of the gun barrel along the direction from the bottom of the gun barrel to the muzzle of the gun barrel.
9. The ignition method of claim 8, wherein:
the trigger time sequence of each section of the multi-stage drive coil is realized by controlling the trigger time by using a time delay device.
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| US5122506A (en) * | 1989-08-10 | 1992-06-16 | Howard J. Greenwald | Contactless mass moving system |
| US5217948A (en) * | 1991-10-18 | 1993-06-08 | General Dynamics Corporation, Space Systems Division | Phase change cooling for an electromagnetic launch |
| CN202442648U (en) * | 2012-02-04 | 2012-09-19 | 李连仲 | Air defense projectile launcher |
| CN205403588U (en) * | 2016-03-02 | 2016-07-27 | 广州大学 | Multistage electromagnetic emitting device of photo -electric control formula |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070234893A1 (en) * | 2006-04-07 | 2007-10-11 | Lockheed Martin Corporation | Augmented EM Propulsion System |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5122506A (en) * | 1989-08-10 | 1992-06-16 | Howard J. Greenwald | Contactless mass moving system |
| US5217948A (en) * | 1991-10-18 | 1993-06-08 | General Dynamics Corporation, Space Systems Division | Phase change cooling for an electromagnetic launch |
| CN202442648U (en) * | 2012-02-04 | 2012-09-19 | 李连仲 | Air defense projectile launcher |
| CN205403588U (en) * | 2016-03-02 | 2016-07-27 | 广州大学 | Multistage electromagnetic emitting device of photo -electric control formula |
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