Electromagnetic emission system

Abstract

The invention discloses an electromagnetic emission system, which comprises a control module, N stages of energy storage modules, N stages of electromagnetic emission modules, an electromagnetic emission track and a plurality of one-way follow current circuits, the electromagnetic transmitting modules are sequentially and annularly sleeved on the periphery of the electromagnetic transmitting track; an initial launching position is arranged on the electromagnetic launching track; the energy storage module at the same level is electrically connected with the electromagnetic emission module and is used for discharging electric energy to the electromagnetic emission module; the control module is electrically connected with each electromagnetic transmitting module and is used for controlling the starting and stopping of each electromagnetic transmitting module, so that the started electromagnetic transmitting module provides power for the current projectile body; the ith-level electromagnetic emission module is electrically connected with the (i + n) th-level energy storage module through a one-way follow current circuit, and the one-way follow current circuit is used for sending residual electric energy in the ith-level electromagnetic emission module to the (i + n) th-level energy storage module for storage when the ith-level electromagnetic emission module is closed. By means of the system, recovery and storage of the residual energy of the ith-level electromagnetic emission module are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic launch, and particularly to an electromagnetic launch system. Background Art

[0002] Pursuing ultra-high object motion speed has always been an important direction of science and technology. From the perspective of the energy source for launch, so far, human society has experienced three stages: mechanical energy launch, chemical energy launch, and electromagnetic energy launch. Electromagnetic launch refers to an emission method that includes electromagnetic energy, and its emergence is an inevitable result of the integration of electrification and the transformation of electric energy. With the advantages of being clean, efficient, sustainable, pollution-free, and ultra-high speed, electromagnetic launch technology has broad application prospects in many fields such as aerospace, transportation, scientific research, and national defense and military. Countries around the world are competing to carry out applied research on electromagnetic launch technology.

[0003] In the traditional launch method during projectile launch, the projectile is accelerated and slides out under the action of electromagnetic force in the acceleration coil. When the projectile coincides with the center position of the acceleration coil, after disconnecting the connection between the capacitor bank and the acceleration coil at this time, there will still be residual energy on the acceleration coil. Most of this residual energy will be dissipated by the acceleration coil in the form of heat, resulting in a reduction in the efficiency of the electromagnetic launch system and excessive power loss. Summary of the Invention

[0004] The present invention provides an electromagnetic launch system, which sends the remaining electric energy in the i-th electromagnetic launch module to the (i + n)-th energy storage module for storage by setting a plurality of unidirectional freewheeling circuits, reducing power loss, realizing energy recovery and utilization, improving system efficiency, and saving electric energy.

[0005] The present invention provides an electromagnetic launch system, including: a control module, N-level energy storage modules, N-level electromagnetic launch modules, an electromagnetic launch track, and a plurality of unidirectional freewheeling circuits; each electromagnetic launch module is sequentially sleeved around the periphery of the electromagnetic launch track; an initial launch position is set on the electromagnetic launch track;

[0006] The same-level energy storage module is electrically connected to the electromagnetic launch module for discharging the stored electric energy to the electromagnetic launch module to enable the electromagnetic launch module to provide power for the current projectile launch.

[0007] The control module is electrically connected to each electromagnetic launch module for controlling the opening or closing of each electromagnetic launch module to enable the opened electromagnetic launch module to provide power for the current projectile and push the current projectile to be launched from the initial launch position.

[0008] The i-th electromagnetic launch module is also electrically connected to the (i + n)-th energy storage module through a unidirectional freewheeling circuit, where n ≥ 2, 1 ≤ i ≤ N - n, N ≥ 3, and i, n, and N are all positive integers;

[0009] The unidirectional freewheeling circuit is used to send the remaining electric energy in the i-th stage electromagnetic emission module to the (i + n)-th stage energy storage module for storage when the i-th stage electromagnetic emission module is turned off.

[0010] Optionally, the system further includes an energy recovery module;

[0011] The energy recovery module is electrically connected to the (N - n - 1)-th stage to the N-th stage electromagnetic emission modules respectively through the unidirectional freewheeling circuit, and is used to send the remaining electric energy in the (N - n - 1)-th stage to the N-th stage electromagnetic emission modules to the energy recovery module for storage through the unidirectional freewheeling circuit.

[0012] Optionally, the electromagnetic emission module includes a driving unit and an electromagnetic coil, and each electromagnetic coil is sequentially sleeved around the periphery of the electromagnetic emission track;

[0013] The control module is electrically connected to each driving unit, and in the same stage, the energy storage module is electrically connected to the electromagnetic coil through the driving unit;

[0014] The control module is used to control the driving unit to be closed or opened, and control the driving unit to be closed in sequence, so that the electric energy stored in the energy storage module is discharged to the electromagnetic coil through the closed driving unit in sequence to provide power for the current projectile.

[0015] Optionally, the driving unit includes a switch and a protection circuit; the control module is electrically connected to the switch through the protection circuit, and the energy storage module is electrically connected to the electromagnetic coil through the switch.

[0016] Optionally, the protection circuit includes a first protection path and a second protection path;

[0017] The first protection path and the second protection path are in parallel and are connected in series between the control module and the switch.

[0018] Optionally, the first protection path includes an optocoupler isolation chip and a first protection resistor;

[0019] The optocoupler isolation chip is connected in series between the control module and the first protection resistor, and the first protection resistor is connected in series between the optocoupler isolation chip and the switch.

[0020] Optionally, the second protection path includes a light-emitting diode and a first current-limiting resistor;

[0021] The light-emitting diode is connected in series between the control module and the first current-limiting resistor, and the first current-limiting resistor is connected in series between the light-emitting diode and the switch.

[0022] Optionally, the energy storage module includes at least one energy storage capacitor, and the energy storage capacitors are in parallel with each other.

[0023] Optionally, the protection circuit further includes a first clamping diode and a second clamping diode;

[0024] The first clamping diode is connected in parallel across both ends of the first protection resistor; the second clamping diode is connected in parallel with the energy storage module.

[0025] Optionally, the protection circuit further includes a second protection resistor;

[0026] The second protection resistor is connected in series between the control module and the protection circuit.

[0027] Optionally, the switch includes an IGBT.

[0028] Optionally, the system further includes a power supply module and a boost module; the power supply module is electrically connected to the energy storage module through the boost module.

[0029] Optionally, the unidirectional freewheeling circuit includes a freewheeling diode.

[0030] In the technical solution of the present invention, by electrically connecting the same-level energy storage module to the electromagnetic launch module, and the control module to each electromagnetic launch module, when controlling the current projectile to accurately reach the preset launch speed, the control module will sequentially control the electromagnetic launch modules to be turned on in a time-sharing manner. At this time, the electric energy stored in the energy storage module will sequentially provide the driving force for accelerating the current projectile through the turned-on electromagnetic launch modules, pushing the current projectile to be launched from the initial launch position on the electromagnetic launch track under the action of electromagnetic force, and exiting from the electromagnetic launch track at the preset launch speed after reaching the preset launch speed, realizing accurate control of the launch speed of the current projectile and improving the hit rate. In addition, by connecting the i-th level electromagnetic launch module to the (i + n)-th level energy storage module through the unidirectional freewheeling circuit, after the i-th level electromagnetic launch module realizes the acceleration of the current projectile, the control module will control the electromagnetic launch module to turn off. After turning off, the remaining electric energy in the i-th level electromagnetic launch module will be transmitted to the (i + n)-th level energy storage module through the unidirectional freewheeling circuit for storage, thereby increasing the initial voltage of the (i + n)-th level energy storage module, reducing power loss, realizing energy recovery and utilization, improving launch efficiency, and saving electric energy.

[0031] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0033] Figure 1 Schematic diagram of a structure of an electromagnetic emission system provided by an embodiment of the present invention;

[0034] Figure 2 Schematic diagram of a connection relationship among an electromagnetic emission module, an energy storage module, a unidirectional freewheeling circuit and an energy recovery module provided by an embodiment of the present invention;

[0035] Figure 3 Schematic diagram of a structure of a second electromagnetic emission system provided by an embodiment of the present invention;

[0036] Figure 4 Schematic diagram of a structure of a third electromagnetic emission system provided by an embodiment of the present invention;

[0037] Figure 5 Schematic diagram of a structure of a fourth electromagnetic emission system provided by an embodiment of the present invention;

[0038] Figure 6 Circuit diagram of an electromagnetic emission system provided by the prior art;

[0039] Figure 7 Circuit diagram of an electromagnetic emission system provided by an embodiment of the present invention;

[0040] Figure 8 Curve graph of the launch speed and launch time of a current projectile provided by an embodiment of the present invention. Detailed implementation manners

[0041] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0043] In one embodiment, Figure 1 FIG. Figure 1 is a schematic structural diagram of an electromagnetic launch system provided by an embodiment of the present invention. This embodiment is applicable to the situation where the remaining electric energy in the i-th stage electromagnetic launch module is recovered and stored in the energy storage module of the subsequent i + n-th stage to achieve energy recovery. As Figure 1 shown, the system includes: a control module 1, N energy storage modules 2, N electromagnetic launch modules 3, an electromagnetic launch track 4, and a plurality of unidirectional freewheeling circuits 5; each electromagnetic launch module 3 is sequentially sleeved around the periphery of the electromagnetic launch track 4; an initial launch position is provided on the electromagnetic launch track 4; the same-level energy storage module 2 is electrically connected to the electromagnetic launch module 3 for discharging the stored electric energy to the electromagnetic launch module 3 so that the electromagnetic launch module 3 provides power for the current projectile 6 to be launched; the control module 1 is electrically connected to each electromagnetic launch module 3 for controlling the opening or closing of each electromagnetic launch module 3 so that the opened electromagnetic launch module 3 provides power for the current projectile 6 and pushes the current projectile 6 to be launched from the initial launch position; the i-th stage electromagnetic launch module 3 is also electrically connected to the (i + n)-th stage energy storage module 2 through the unidirectional freewheeling circuit 5, n≥2, 1≤i≤N - n, N≥3, and i, n, and N are all positive integers; the unidirectional freewheeling circuit 5 is used to send the remaining electric energy in the i-th stage electromagnetic launch module 3 to the (i + n)-th stage energy storage module 2 for storage when the i-th stage electromagnetic launch module 3 is turned off.

[0044] Optionally, the unidirectional freewheeling circuit 5 includes a freewheeling diode.

[0045] Among them, the energy storage module 2 is used to store electric energy and provide power to the electromagnetic launch module 3 through discharging. The energy storage module 2 may include, but is not limited to, at least one energy storage capacitor. The electromagnetic launch module 3 is a structure that converts electric energy into electromagnetic force to achieve the accelerated launch of the current projectile 6. In this embodiment, both the energy storage module 2 and the electromagnetic launch module 3 include N levels, that is, the number of levels of the energy storage module 2 is the same as that of the electromagnetic launch module 3, so that the electric energy stored in each level of the energy storage module 2 can be discharged into the corresponding level of the electromagnetic launch module 3. In addition, Figure 1By arranging electromagnetic emission modules 3 on both sides of the electromagnetic emission track 4, it is exemplarily shown that each electromagnetic emission module 3 successively sleeved around the periphery of the electromagnetic emission track 4, and there is a preset distance between each electromagnetic emission module 3. In actual setting, each level of electromagnetic emission module 3 can be directly wound around the periphery of the electromagnetic emission track 4. Usually, the arrangement direction of each electromagnetic emission module 3 is parallel to the axial direction of the electromagnetic emission track 4, so that when the current projectile 6 is launched from the initial launch position of the electromagnetic emission track 4, it can be accelerated step by step and finally reach the preset launch speed. The electromagnetic emission track 4 is a device that uses electromagnetic energy to replace traditional mechanical energy or chemical energy for launching. It conducts contact feeding through a linear guide rail and uses electromagnetic force to push the current projectile 6 to accelerate in the track. The control module 1 is the core control structure of this system, which is used to control the opening or closing of each level of electromagnetic emission module 3, so that the electric energy in the energy storage module 3 can provide forward power for the current projectile 6 through the opened electromagnetic emission module 3, thereby pushing the current projectile 6 to be launched from the initial launch position on the electromagnetic emission track 4. The unidirectional freewheeling circuit 5 is used to transfer the remaining electric energy in the i-th level electromagnetic emission module 3 to the subsequent i + n-th level energy storage module 2 for storage when the i-th level electromagnetic emission module 3 is turned off, so as to charge the i + n-th level energy storage module 2. In this embodiment, the number of unidirectional freewheeling circuits 5 is multiple. Usually, the number of unidirectional freewheeling circuits 5 is less than the number of levels of the electromagnetic emission module 3 or the energy storage module 2. In addition, the unidirectional freewheeling circuit 5 has a unidirectional conduction function, that is, it only allows the remaining electric energy in the i-th level electromagnetic emission module 3 to be transferred to the subsequent i + n-th level energy storage module 2, and cannot be transferred in the reverse direction to avoid abnormalities. The unidirectional freewheeling circuit 5 can include but is not limited to a freewheeling diode.

[0046] Specifically, when controlling the launch speed of the current projectile 6 to make the exit speed of the current projectile 6 in the electromagnetic emission track 4 accurately reach the preset launch speed, by electrically connecting the same level of energy storage module 2 and the electromagnetic emission module 3, and the control module 1 is electrically connected to each electromagnetic emission module 3. After each level of energy storage module 2 is fully charged or the electric energy reaches a certain value, the control module 1 will successively control the electromagnetic emission module 3 to be turned on at different times. After the electromagnetic emission module 3 is turned on, the electric energy stored in the energy storage module 2 at this time will successively provide accelerating power for the current projectile 6 through the turned-on electromagnetic emission module 3, convert the electric energy into electromagnetic force, and push the current projectile 6 to be launched from the initial launch position on the electromagnetic emission track 4 under the action of the electromagnetic force, and after reaching the preset launch speed, it will exit from the electromagnetic emission track 4 at this speed to be launched to the target object to improve the hit rate.

[0047] In addition, after the current projectile 6 passes through the i-th stage electromagnetic launch module 3, the control module 1 controls the i-th stage electromagnetic launch module 3 to turn off. At this time, there will still be remaining electrical energy in the i-th stage electromagnetic launch module 3 after accelerating the current projectile 6. When storing and recycling the remaining electrical energy in the electromagnetic launch module 3, by setting a plurality of unidirectional freewheeling circuits 5, the i-th stage electromagnetic launch module 3 is electrically connected to the (i + n)-th stage energy storage module 2 through the unidirectional freewheeling circuit 5. After the i-th stage electromagnetic launch module 3 accelerates the current projectile 6, the control module 1 controls the electromagnetic launch module 3 to turn off. After turning off, the remaining electrical energy in the i-th stage electromagnetic launch module 3 will be transmitted to the (i + n)-th stage energy storage module 2 through the unidirectional freewheeling circuit 5 for storage, thereby increasing the initial voltage of the (i + n)-th stage energy storage module 2, improving the launch efficiency, and saving electrical energy.

[0048] It should be noted that in this embodiment, n≥2 is set, that is, the unidirectional freewheeling circuit 5 is located between the electromagnetic launch module 3 and the energy storage module 2 with a difference of at least two stages. That is, taking n = 2 as an example, the first stage electromagnetic launch module 3 is electrically connected to the third stage energy storage module 2 through the unidirectional freewheeling circuit 5, and the second stage electromagnetic launch module 3 is electrically connected to the fourth stage energy storage module 2 through the unidirectional freewheeling circuit 5. The subsequent connection relationship can refer to the above description. In this way, it can be ensured that the remaining electrical energy stored in the (i + 2)-th stage energy storage module 2 can be used as the initial voltage, avoiding the situation where the (i + 2)-th stage energy storage module 2 has provided accelerating power for the current projectile 6 through the turned-on electromagnetic launch module 3, but the remaining electrical energy in the i-th stage electromagnetic launch module 3 has not been transmitted to the (i + 2)-th stage energy storage module 2. And 1≤i≤N - n is set, that is, the remaining electrical energy of the last N - n - 1 stage electromagnetic launch module 3 to the N-th stage electromagnetic launch module 3 will not be connected to the energy storage module 2 through the unidirectional freewheeling circuit 5. This setting is because there is no energy storage module 2 for energy storage later, so i needs to be limited.

[0049] In the technical solution of the embodiment of the present invention, by electrically connecting the same-level energy storage module with the electromagnetic launch module, and the control module with each electromagnetic launch module, when controlling the current projectile to accurately reach the preset launch speed, the control module will sequentially control the electromagnetic launch modules to be turned on in a time-sharing manner. At this time, the electric energy stored in the energy storage module will sequentially provide the driving force for accelerating the current projectile through the turned-on electromagnetic launch modules, pushing the current projectile to be launched from the initial launch position on the electromagnetic launch track under the action of electromagnetic force, and after reaching the preset launch speed, exiting from the electromagnetic launch track at this speed, realizing accurate control of the launch speed of the current projectile and improving the hit rate. In addition, the i-th level electromagnetic launch module is electrically connected to the (i + n)-th level energy storage module through a one-way freewheeling circuit, so that after the i-th level electromagnetic launch module realizes the acceleration of the current projectile, the control module will control the electromagnetic launch module to turn off. After turning off, the remaining electric energy in the i-th level electromagnetic launch module will be transmitted to the (i + n)-th level energy storage module through the one-way freewheeling circuit for storage, thereby increasing the initial voltage of the (i + n)-th level energy storage module, reducing the power loss, realizing energy recovery and utilization, improving the launch efficiency, and saving electric energy.

[0050] In another specific embodiment, optionally, Figure 2 is a schematic structural diagram of the connection relationship between an electromagnetic launch module, an energy storage module, a one-way freewheeling circuit, and an energy recovery module provided by the embodiment of the present invention. Refer to Figure 2 As shown, the system further includes an energy recovery module 7; the energy recovery module 7 is electrically connected to the (N - n - 1)-th level to the N-th level electromagnetic launch modules 3 through a one-way freewheeling circuit 5, and is used to send the remaining electric energy in the (N - n - 1)-th level to the N-th level electromagnetic launch modules 3 to the energy recovery module 7 through the one-way freewheeling circuit 5 for storage.

[0051] Among them, the energy recovery module 7 is used to perform energy recovery and storage on the remaining electric energy in the last (N - n - 1)-th level to the N-th level electromagnetic launch modules 3.

[0052] Specifically, when performing energy recovery on the remaining electric energy in the (N - n - 1)-th level to the N-th level electromagnetic launch modules 3, by setting the energy recovery module 7, the energy recovery module 7 is electrically connected to the (N - n - 1)-th level to the N-th level electromagnetic launch modules 3 through a one-way freewheeling circuit 5, so that the remaining electric energy after the (N - n - 1)-th level to the N-th level electromagnetic launch modules 3 realize the accelerating and propelling effect on the current projectile 6 can be unidirectionally transmitted to the energy recovery module 7. After the energy recovery module 7 stores the remaining electric energy, it can be used as the initial voltage for the next projectile launch, improving the energy utilization rate and reducing the power loss.

[0053] Optionally, Figure 3Schematic diagram of the second electromagnetic launch system provided by the embodiments of the present invention. Refer to Figure 3 As shown in the figure, the electromagnetic launch module 3 includes a driving unit 31 and electromagnetic coils 32, and each electromagnetic coil 32 is sequentially sleeved around the periphery of the electromagnetic launch track 4; the control module 1 is electrically connected to each driving unit 31, and in the same stage, the energy storage module 2 is electrically connected to the electromagnetic coil 32 through the driving unit 31; the control module 1 is used to control the driving unit 31 to be closed or opened, and control the driving unit 31 to be closed in sequence, so that the electric energy stored in the energy storage module 2 is discharged to the electromagnetic coil 32 through the closed driving unit 31 in sequence, providing power for the current projectile 6.

[0054] Among them, the driving unit 31 is a bridge connecting the energy storage module 2 and the electromagnetic coil 32. When the driving unit 31 is closed, the electric energy stored in the energy storage module 2 is transmitted to the electromagnetic coil 32 through the closed driving unit 31, generating an electromagnetic force. In this embodiment, the driving unit 31 may include, but is not limited to, a switch. The electromagnetic coil 32 is a device that uses the principle of electromagnetic induction to accelerate the projectile. Its core is to generate a magnetic field through a current-carrying coil, and then use the interaction force between the magnetic field and the projectile to achieve acceleration. The current projectile 6 is usually a conductor and can be accelerated under the action of the electromagnetic force. In addition, in this embodiment, the current projectile 6 is made of ferromagnetic material, the axial projection of the shape is circular, and the axial length is the same as the length of the electromagnetic coil 32. The diameter of the current projectile 6 is slightly smaller than that of the electromagnetic coil 32.

[0055] Specifically, when the control module 1 determines to turn on or off the electromagnetic launch module 3, in essence, it determines whether the driving unit 31 in the electromagnetic launch module 3 is closed or opened, and controls the driving unit 31 to be closed or opened in sequence. After the driving unit 31 is closed, the electric energy stored in each level of the energy storage module 2 is transmitted to the electromagnetic coil 32 through the closed corresponding-level driving unit 31. The electromagnetic coil 32 generates a magnetic field under the action of the electric energy, forming an electromagnetic force. The electromagnetic force will accelerate the speed of the current projectile 6 transmitted in the electromagnetic launch track 4 to reach the preset launch speed.

[0056] In another specific embodiment, Figure 4 Schematic diagram of the third electromagnetic launch system provided by the embodiments of the present invention. Refer to Figure 4 As shown in the figure, optionally, the driving unit 31 includes a switch 311 and a protection circuit 312; the control module 1 is electrically connected to the switch 311 through the protection circuit 312, and the energy storage module 2 is electrically connected to the electromagnetic coil 32 through the switch 311.

[0057] Among them, the switch 311 includes an IGBT high-power switch. The protection circuit 312 is a circuit structure that plays a protective role in the system.

[0058] Specifically, the control module 1 controls the closing of the driving unit 31, which essentially means controlling the closing of the switch 311, so as to realize the transmission of the electric energy in the energy storage module 2 to the electromagnetic coil 32 through the switch 311, and promote the accelerated launch of the current projectile 6. During this process, the protection circuit 312 is used to protect the system and prevent phenomena such as abnormal voltage.

[0059] Optionally, continue to refer to Figure 4 , the protection circuit 312 includes a first protection path 3121 and a second protection path 3122; the first protection path 3121 and the second protection path 3122 are in parallel and are connected in series between the control module 1 and the switch 311.

[0060] Optionally, continue to refer to Figure 4 , the first protection path 3121 includes an optocoupler isolation chip U1 and a first protection resistor R1; the optocoupler isolation chip U1 is connected in series between the control module 1 and the first protection resistor R1, and the first protection resistor R1 is connected in series between the optocoupler isolation chip U1 and the switch 311.

[0061] Among them, the optocoupler isolation chip U1 is an electronic device that uses optical signals to achieve electrical signal isolation and transmission. Its core function is to achieve electrical isolation between input and output. By converting electrical signals into optical signals and then converting the optical signals back into electrical signals, the optocoupler isolation chip U1 can block the electrical connection between input and output, thereby preventing damage to low-voltage circuits caused by high voltage or high current. This isolation method is particularly suitable for signal transmission between low-voltage control circuits and high-voltage circuits. In this embodiment, the optocoupler isolation chip U1 can be powered by dual positive and negative voltages, that is, +16V and -5V voltages. Using negative voltage can ensure the effective turn-off of the switch 311. The first protection resistor R1 is a gate resistor, which is used to control the IGBT gate current to control the switching speed and stability of the IGBT.

[0062] Optionally, continue to refer to Figure 4 , the second protection path 3122 includes a light-emitting diode D2 and a first current-limiting resistor R2; the light-emitting diode D2 is connected in series between the control module 1 and the first current-limiting resistor R2, and the first current-limiting resistor R2 is connected in series between the light-emitting diode D2 and the switch 311.

[0063] Among them, the light-emitting diode D2 is used to light up when the switch 311 is broken down due to breakdown, so as to indicate system abnormalities and facilitate maintenance by staff. The first current-limiting resistor R2 is used to limit the current and prevent excessive current from damaging subsequent circuit components, playing a protective role in the protection module 312.

[0064] Specifically, when the control module 1 determines the on / off state of the switch 311, it outputs a control signal. The control signal is transmitted to the first protection resistor R1 after passing through the first current-limiting resistor R2 and the optocoupler isolation chip U1. The switch 311 realizes its on / off state by controlling the first protection resistor R1 according to the control signal. When the switch 311 is closed, the electric energy stored in the energy storage module 2 is transmitted to the corresponding electromagnetic coil 32 through the closed switch 311, so as to accelerate the launch of the current projectile 6. When the voltage of the switch 311 is too high and breakdown occurs, the switch 311 is in an open state, then a loop is formed between the corresponding first protection path 3121 and the second protection path 3122, and the current passes through the second protection path 3122, causing the light-emitting diode D2 in the second protection path 3122 to light up to prompt the staff that the switch 311 is abnormal.

[0065] Optionally, continue to refer to Figure 4 , the protection circuit 312 further includes a first clamping diode D1 and a second clamping diode (not shown in the figure); the first clamping diode D1 is connected in parallel across the first protection resistor R1; the second clamping diode is connected in parallel with the energy storage module 2.

[0066] Among them, the first clamping diode D1 is a diode used to limit the voltage, which can clamp the voltage input to the switch 311 within a safe range to play a protective role. The second clamping diode is a component that uses the one-way conductivity of the diode to limit the potential of a certain point in the circuit. Its function is to fix a certain part of the signal waveform at a selected level without changing the waveform of the signal, ensuring the stability and safety of the circuit. In this embodiment, the second clamping diode is connected in parallel with the energy storage module 2 to play a reverse voltage protection and clamping voltage role for the energy storage module 2, ensuring that the current in the energy storage module 2 can only flow forward and cannot flow backward.

[0067] Optionally, continue to refer to Figure 4 , the protection circuit 312 further includes a second protection resistor R3; the second protection resistor R3 is connected in series between the control module 1 and the protection circuit 312.

[0068] Among them, the second protection resistor R3 is used to play a protective role to avoid system abnormalities.

[0069] In another specific embodiment, Figure 5 is the structural schematic diagram of the fourth electromagnetic launch system provided by the embodiment of the present invention. Refer to Figure 5 as shown. Optionally, the energy storage module 2 includes at least one energy storage capacitor 21, and the energy storage capacitors 21 are connected in parallel with each other.

[0070] Among them, the energy storage capacitor 21 refers to an electronic component that utilizes the characteristics of a capacitor to store and release electrical energy. Specifically, when the electrical charge of a single energy storage capacitor 21 can meet the electrical energy required by an electromagnetic coil 32, this embodiment can set the first-level energy storage module 2 to include only one energy storage capacitor 21; when the electrical charge of a single energy storage capacitor 21 cannot meet the electrical energy required by an electromagnetic coil 32, this embodiment can set the first-level energy storage module 2 to include at least one energy storage capacitor 21, and the energy storage capacitors 21 are connected in parallel to ensure the accelerated launch of the current projectile 6. In this embodiment, the energy storage capacitor 21 can include, but is not limited to, aluminum electrolytic capacitors.

[0071] Optionally, continuing to refer to Figure 5 , the system further includes a power supply module 8 and a boost module 9; the power supply module 8 is electrically connected to the energy storage module 2 through the boost module 9.

[0072] Among them, the power supply module 8 is a power source for supplying power to the energy storage capacitor 21. The boost module 9 is used to boost the low voltage provided by the power supply module 8 to reach the operating voltage of the energy storage module 2. In this embodiment, the voltage provided by the power supply module 8 is alternating current, and the boost module 9 can include a rectifier circuit, a filter circuit, and an inverter circuit. The rectifier circuit is a circuit that uses the unidirectional conductivity of diodes to convert alternating current into unidirectional pulsating direct current. The filter circuit is used to filter out the AC components in the pulsating direct current to obtain smooth rectified direct current. The inverter circuit is a circuit that converts DC electrical energy into AC electrical energy to achieve voltage boost.

[0073] In another specific embodiment, n = 2. The first-level energy storage module is electrically connected to the first-level electromagnetic coil through the first-level drive circuit, and the first-level electromagnetic coil is electrically connected to the third-level energy storage module via a freewheeling diode; the second-level energy storage module is electrically connected to the second-level electromagnetic coil through the second-level drive circuit, and the second-level electromagnetic coil is electrically connected to the fourth-level energy storage module via a freewheeling diode; and so on. The (n - 2)-th level energy storage module is electrically connected to the (n - 2)-th level electromagnetic coil through the (n - 2)-th level drive circuit, and the (n - 2)-th level electromagnetic coil is electrically connected to the n-th level energy storage module via a freewheeling diode; the (n - 1)-th level energy storage module is electrically connected to the (n - 1)-th level electromagnetic coil through the (n - 1)-th level drive circuit, and both the (n - 1)-th level electromagnetic coil and the n-th level electromagnetic coil are electrically connected to the energy recovery module. The freewheeling and reuse process of this system is as follows:

[0074] When the first - stage energy storage module is fully charged, the control module controls the IGBT in the first - stage drive circuit to close, and current passes between the collector and the emitter. The current projectile accelerates under the electromagnetic force of the first - stage electromagnetic coil. After the control module controls the IGBT in the first - stage drive circuit to disconnect, the residual energy in the first - stage electromagnetic coil flows through the free - wheeling diode to the third - stage energy storage module for storage. When the current projectile moves to one end of the second - stage electromagnetic coil, the control module controls the IGBT in the second - stage drive circuit to close, and the current projectile accelerates under the electromagnetic force of the second - stage electromagnetic coil. After the control module controls the IGBT in the second - stage drive circuit to disconnect, the residual energy in the second - stage electromagnetic coil flows through the free - wheeling diode to the fourth - stage energy storage module for storage. And so on. When the current projectile moves to one end of the (n - 2) - stage electromagnetic coil, the control module controls the IGBT in the (n - 2) - stage drive circuit to close, and the current projectile accelerates under the electromagnetic force of the (n - 2) - stage electromagnetic coil. After the control module controls the IGBT in the (n - 2) - stage drive circuit to disconnect, the residual energy in the (n - 2) - stage electromagnetic coil flows through the free - wheeling diode to the n - th stage energy storage module for storage. When the projectile moves to one end of the (n - 1) - stage electromagnetic coil, the control module controls the IGBT in the (n - 1) - stage drive circuit to close, and the current projectile accelerates under the electromagnetic force of the (n - 1) - stage electromagnetic coil. After the control module controls the IGBT in the (n - 1) - stage drive circuit to disconnect, the residual energy in the (n - 1) - stage electromagnetic coil flows through the free - wheeling diode to the energy recovery module. When the projectile moves to one end of the n - th electromagnetic coil, the control module controls the IGBT in the n - th drive circuit to close, and the current projectile accelerates under the electromagnetic force of the n - th electromagnetic coil. After the control module controls the IGBT in the n - th drive circuit to disconnect, the residual energy in the n - th electromagnetic coil flows through the free - wheeling diode to the energy recovery module. When the launch process ends, the free - wheeling recovery utilization ends, and the energy in the energy recovery module can be used as the initial energy for the next launch.

[0075] Figure 6 The circuit diagram of an electromagnetic launch system provided by the prior art Figure 7 The circuit diagram of an electromagnetic launch system provided by an embodiment of the present invention Figure 8 The curve graph of the launch speed and launch time of a current projectile provided by an embodiment of the present invention. Refer to Figures 6 to 8As shown, the outer diameter of the current projectile is 7.4 mm, the inner diameter is 5.1 mm, the length is 13.5 mm, and the material is pure iron. The inner radius of the first-stage electromagnetic coil is 15 mm, the axial length is 17.5 mm, the number of turns is 270, and the material is copper. The inner radius of the third-stage electromagnetic coil is 15 mm, the axial length is 17.5 mm, the number of turns is 210, the material is copper, and the interval between it and the first-stage electromagnetic coil is 2 mm. The capacitance value of the first-stage energy storage module is 480 μF, and the initial voltage is 480 V. The capacitance value of the third-stage energy storage module is 360 μF, and the initial voltage is 480 V. For the convenience of explanation, Figure 6 the described circuit is called the first circuit, Figure 7 and the described circuit is called the second circuit. In Figure 6 it, the left side represents the first-stage circuit, the right side is the third-stage circuit, Q1 and Q2 are switches, R5 and R6 are current-limiting resistors, L1 and L2 are electromagnetic coils, D5 and D6 are freewheeling diodes, and C1 and C2 are energy storage modules, Figure 7 in which the left half represents the first-stage circuit, the right half is the third-stage circuit, Q3, Q4 and Q5 are switches, R7 and R4 are current-limiting resistors, L3 and L4 are electromagnetic coils, D7 is a freewheeling diode, D8 and D9 are clamping diodes, and C3 and C4 are energy storage modules.

[0076] From Figure 8 it can be seen that the electromagnetic force acting on the current projectile by the first-stage electromagnetic coils of the first circuit and the second circuit ( Figure 8 to the left of the middle solid line) is basically the same. At about 1.55 ms, the force of the electromagnetic coil of the first circuit on the current projectile is affected by the RL freewheeling circuit formed by the freewheeling diode and the coil, resulting in the existence of freewheeling in the circuit. The force of the first-stage electromagnetic coil discharging on the current projectile cannot be turned off in time, and the phenomenon of the electromagnetic force of the electromagnetic coil pulling back on the current projectile occurs, resulting in a downward trend in the speed of the current projectile. In the second circuit, because the electromagnetic launch system is optimized, the freewheeling diode in the RL freewheeling circuit of the first circuit is moved to the connection point of the two-stage acceleration coil circuit. This not only eliminates the RL freewheeling problem existing after the IGBT is turned off, but also can effectively utilize the residual energy in the circuit of the previous-stage electromagnetic coil to increase the initial voltage of the next-stage energy recovery module, thereby improving the acceleration effect of the next-stage electromagnetic coil.

[0077] Under the action of the electromagnetic coil of the second circuit, the first-stage speed of the current projectile is 23.87 m / s, and the launch efficiency is 5.62%, as shown at point a1 in Figure 8 . After the residual voltage after the first-stage energy storage module discharges to the first-stage electromagnetic coil is superimposed on the third-stage capacitor bank for discharge, the speed of the current projectile is 36.65 m / s, and the launch efficiency is 6.62%, as shown at point a2 in Figure 8 .

[0078] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in the present invention can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is imposed herein.

[0079] The above specific embodiments do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub - combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An electromagnetic emission system, characterized in that, Comprising: A control module, an N-level energy storage module, an N-level electromagnetic emission module, an electromagnetic emission track, and a plurality of unidirectional freewheeling circuits; each of the electromagnetic emission modules is sequentially sleeved around the periphery of the electromagnetic emission track; an initial emission position is provided on the electromagnetic emission track; The energy storage module of the same level is electrically connected to the electromagnetic emission module, and is used to discharge the stored electric energy to the electromagnetic emission module, so that the electromagnetic emission module provides power for the current projectile to be launched; The control module is electrically connected to each of the electromagnetic emission modules, and is used to control the opening or closing of each of the electromagnetic emission modules, so that the opened electromagnetic emission module provides power for the current projectile and pushes the current projectile to be launched from the initial emission position; The i-th level electromagnetic emission module is also electrically connected to the (i + n)-th level energy storage module through the unidirectional freewheeling circuit, where n≥2, 1≤i≤N - n, N≥3, and i, n, N are all positive integers; The unidirectional freewheeling circuit is used to send the remaining electric energy in the i-th level electromagnetic emission module to the (i + n)-th level energy storage module for storage when the i-th level electromagnetic emission module is closed.

2. The electromagnetic emission system according to claim 1, wherein It further includes an energy recovery module; The energy recovery module is electrically connected to the electromagnetic emission modules from the (N - n - 1)-th level to the N-th level through the unidirectional freewheeling circuit, and is used to send the remaining electric energy in the electromagnetic emission modules from the (N - n - 1)-th level to the N-th level to the energy recovery module for storage through the unidirectional freewheeling circuit.

3. The electromagnetic emission system according to claim 1, characterized in that, The electromagnetic emission module includes a driving unit and an electromagnetic coil, and each of the electromagnetic coils is sequentially sleeved around the periphery of the electromagnetic emission track; The control module is electrically connected to each of the driving units, and in the same level, the energy storage module is electrically connected to the electromagnetic coil through the driving unit; The control module is used to control the driving unit to be closed or opened, and control the driving unit to be closed in sequence, so that the electric energy stored in the energy storage module is discharged to the electromagnetic coil in sequence through the closed driving unit to provide power for the current projectile.

4. The electromagnetic emission system according to claim 3, characterized in that, The driving unit includes a switch and a protection circuit; the control module is electrically connected to the switch through the protection circuit, and the energy storage module is electrically connected to the electromagnetic coil through the switch.

5. The electromagnetic launch system according to claim 4, characterized in that The protection circuit includes a first protection path and a second protection path; The first protection path and the second protection path are in parallel and are connected in series between the control module and the switch.

6. The electromagnetic emission system according to claim 5, characterized in that, The first protection path includes an opto-isolation chip and a first protection resistor; The opto-isolation chip is connected in series between the control module and the first protection resistor, and the first protection resistor is connected in series between the opto-isolation chip and the switch.

7. The electromagnetic emission system according to claim 5, characterized in that, The second protection path includes a light-emitting diode and a first current-limiting resistor; The light-emitting diode is connected in series between the control module and the first current-limiting resistor, and the first current-limiting resistor is connected in series between the light-emitting diode and the switch.

8. The electromagnetic emission system according to claim 5, characterized in that The energy storage module includes at least one energy storage capacitor, and the energy storage capacitors are connected in parallel with each other.

9. The electromagnetic emission system according to claim 6, wherein The protection circuit further includes a first clamping diode and a second clamping diode; The first clamping diode is connected in parallel across the two ends of the first protection resistor; the second clamping diode is connected in parallel with the energy storage module.

10. The electromagnetic emission system according to claim 4, characterized in that, The protection circuit further includes a second protection resistor; The second protection resistor is connected in series between the control module and the protection circuit.

11. The electromagnetic emission system according to claim 4, characterized in that, The switch includes an IGBT.

12. The electromagnetic emission system according to claim 1, characterized in that, It further includes a power supply module and a boost module; the power supply module is electrically connected to the energy storage module through the boost module.

13. The electromagnetic emission system according to claim 1, characterized in that, The unidirectional freewheeling circuit includes a freewheeling diode.

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