Design and Test of a Single-Stage Double-Layer Multipole Field Electromagnetic Launcher With a Rotational Performance

Huimin Deng,Zhongming Yan,Guangcheng Fan,Le Liang,Yu Wang

doi:10.1109/access.2019.2935111

Huimin Deng, Zhongming Yan + Show 3 more

Open Access

https://doi.org/10.1109/access.2019.2935111

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Abstract

A new type of multipole field electromagnetic launcher is designed in this paper, which has two parallel layers of multipole structure, and there is a 30-degree relative torsion angle between the inner and the outer one. The armature is designed as a complete and symmetrical hollow cylindrical metal sleeve with no slots. Owing to the superposition of the magnetic fields generated by the two layers, this novel structure can make the magnetic field density and eddy current distribution on the armature unbalanced, which generates an axial force and torque simultaneously. Simulations were conducted, and the magnetic field and the eddy current distribution were analyzed. The simulations indicate that this double-layer multipole field electromagnetic launcher achieves a rotational motion and a higher linear speed than that of single-layer structure. Experiments were performed and the results verified the correctness of the simulations. Due to its rotational performance, this configuration provides an approach to obtain gyroscopic stabilization for projectiles. It creates condition for multi-stage and combined mode applications because the armature does not need to be processed particularly to meet special requirements.

Highlights

Induction launcher is always a main branch of electromagnetic launcher by virtue of non-contact acceleration and the distribution of stresses upon a large surface area [1]–[3]
The simulation model is described; the magnetic fields generated by the pulsed currents are analyzed; the eddy current distribution on the armature induced by the magnetic field is discussed; the axial magnetic force and torque exerted on the armature are elaborated
This paper proposes a single-stage double-layer Multipole field electromagnetic launcher (MFEL) configuration possessing linear and rotational performances simultaneously

Summary

Introduction

Induction launcher is always a main branch of electromagnetic launcher by virtue of non-contact acceleration and the distribution of stresses upon a large surface area [1]–[3]. INDEX TERMS Double-layer multipole field electromagnetic launcher, eddy current distribution, magnetic force and torque, rotational motion. Demonstrated that MFEL could generate rotational force and simultaneously provide linear acceleration [9]–[12], which supplies several approaches for projectiles to achieve gyroscopic stabilization.

Results

Conclusion