Research on energy conversion mechanism of coil induction electromagnetic emission system

DOI:	10.11809/bqzbgcxb2024.06.013
Keywords:	electromagnetic force; electromagnetic propulsion system; conversion efficiency; permanent magnet enhanced type; numerical calculation; finite element simulation
Abstract:	In order to obtain the energy conversion mechanism of the coil induced electromagnetic launch system, this paper, based on the law of momentum conservation, converts the nonlinear negative feedback closed loop system into an open loop system under specific conditions. Starting from the principle of thrust generation, numerical calculation methods are used to solve the magnetic field distribution data of the driving coil, and the distribution data is fitted as a magnetic field distribution function through polynomial fitting and Gaussian fitting to calculate the axial thrust coefficient of the armature based on the distribution function. The results of magnetic field distribution data indicate that the maximum axial magnetic induction intensity is nearly twice greater than the maximum radial magnetic induction intensity, and the position of the maximum axial magnetic induction intensity differs by 1/2 of the length of the driving coil from the position of the maximum radial magnetic induction intensity. The thrust coefficient data shows that the electromagnetic force coefficient of the winding armature system is 10 times greater than that of the ring column armature system. Through further analysis, the magnetic field distribution characteristics of the driving coil and the relationship between thrust and system efficiency are obtained. Finally, the effectiveness of the conclusions was verified through finite element simulation of three systems, and the basic relationship between the maximum thrust position and the optimal triggering position was given, forming the basic guiding principles for the design of the drive coil and armature structure.
Published:	2024-06-28
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