Modeling Of Coil Type Electromagnetic Launcher And Analysis Of Influencing Factors

With the rapid development of modern military science,ultra-high-speed electromagnetic launch technology can solve many bottleneck problems encountered in the development of traditional artillery,and has gradually become the frontier field of research in various countries.In the future,advanced kinetic energy weapons need electromagnetic launching technology to provide longer range,faster speed and higher stability for the shells.The electromagnetic coil gun can make the projectile obtain extremely high kinetic energy in a short time,and has a high energy conversion efficiency.However,the physical mechanism of the coil-type electromagnetic transmitting device is non-linear and has many influencing factors.The test cost is relatively high,and it is difficult to obtain more accurate transmitting performance through simulation calculation.Therefore,how to accurately establish the simulation model of the coil-type transmitting device and fully consider the non-linear influence of various factors is the key to the design of this type of device.In this thesis,taking the single-stage coil-type transmitting device as an example,the working mechanism and main influencing factors of the device are analyzed in conjunction with the field-circuit coupling principle,and the simulation model of the single-stage transmitting device is established to realize the optimization of the parameters of the singlestage device;The test platform of the single-stage coil transmitter has obtained the output characteristics under the optimal parameter matching,and has been compared with the simulation results to verify the validity of the model;on this basis,the simulation of the multistage coil transmitter has been established Analyze the model and analyze the armature deceleration effect existing in the system in many aspects;taking a large mass and high-speed transmission demand as the application background,the system design and optimization are carried out based on the established multi-stage coil transmission simulation model,and the analysis is carried out The influence of armature structure on launch performance provides theoretical guidance for practical engineering applications.Through the above research,it is proved that the main factor affecting the coil emission performance is the matching degree of the coil structure coefficient K and the coil current waveform.Among them,K is mainly determined by the coil length l and radial thickness r.Under certain conditions,the smaller l is,the larger r can provide a larger K;the coil current is mainly determined by the power supply parameters.During high-speed transmission,the larger the power supply voltage,the more the capacitance Smaller can provide a more efficient current waveform.The physical cause of the armature deceleration effect is that the armature has an inductive effect,and reducing the resistance component of the armature can reduce the impact of the armature deceleration effect.Since the armature induced current has a skin effect,changing the armature structure to L-shape or wire-wound can significantly improve the system’s launch performance,and in high-speed launch systems,the overall performance of copper armatures is better than aluminum armatures.The above conclusions can provide theoretical guidance for practical engineering applications and ultimately serve the goal of improving coil electromagnetic launch performance.