Structural design and optimization of DC excitation coil for electromagnetic launch weft insertion

Abstract

Electromagnetic launch weft insertion technology is expected to be used in the weaving of ultra-wide, high-density, thick and heavy-duty fabrics for modern industries due to its high-speed, controllability and ease of intelligence. The technical goal of ultra-wide electromagnetic launch weft insertion is to generate as large a stable electromagnetic force as possible. The magnitude of the electromagnetic force on the weft gripper is affected by the gradient magnetic field generated by the coil. The greater the gradient value of the magnetic field strength, the greater the electromagnetic force on the weft gripper. This article introduces a method for optimizing the coil structure. By optimizing the aspect ratio of the coil and the arrangement of the number of turns of the coil, the proportion of the small gradient value of the magnetic field intensity of the energized coil on the weft clamp is reduced and the acceleration of the weft clamp is improved. Electromagnetic force in the process. A mathematical model for calculating electromagnetic force based on nonlinear characteristics of ferromagnetic materials is established and multi-objective optimization is carried out using a genetic algorithm. The results show that the optimized coil has better emission performance and higher electromagnetic force work. It can provide a theoretical basis for the optimization of the coil structure in the multistage coil acceleration situation.