Design and Simulation of Double Closed-Loop Speed Regulation System for Permanent Magnet Secondary Helical Coil Electromagnetic Propulsion Device

The permanent magnet secondary helical coil electromagnetic propulsion device combines the advantages of coil-type systems for propelling large-mass loads and rail-type synchronous power supply. This structure, similar to the working principle of a linear motor, offers strong controllability. The H-bridge reversible chopper circuit, a type of composite DC-DC converter, enables wider range, higher precision, and smoother speed regulation when integrated with the electromagnetic propulsion device in a full-bridge circuit. By optimizing the system structure for performance, a dual-loop control system for the electromagnetic propulsion device was designed to meet the requirements. To address thrust fluctuations during operation, a nonlinear sliding mode controller was developed. The feasibility of the proposed scheme was verified using Simulink simulation tools.