Design and Simulation of a Moving-magnet-type Linear Synchronous Motor for Electromagnetic Launch System

The electromagnetic aircraft launch system (EMALS) offers significant benefits to the aircraft, ship, personnel, and operational capabilities. EMALS has such advantages as high thrust, good controllability, reusable, etc., as a launching motor, a double-side plate permanent magnet linear synchronous motor (PMLSM) can provide high instantaneous thrust. This paper presents the design and analysis of the moving-magnet-type permanent magnet linear synchronous motor (PMLSM). A detailed analytical modeling based on Maxwell’s equations is presented for analysis and design of PMLSM with Halbach array. In order to improve the thrust characteristics of PMLSM, the structural characteristics and magnetic field are analyzed. The results show an enhancement in the motor performance. Finally, we have used 2-D nonlinear time-stepping transient finite element method to demonstrate validity of the analytical analysis and parametric search is used for multi-objective optimization of PMLSM. Using finite element analysis (FEA), the effects of the parameters on the thrust and thrust ripple waveforms are analyzed.

Keywords:

Electromagnetic Aircraft Launch System , Permanent Magnet Linear Synchronous , Motor , Halbach Shaped Magnets , Finite Element Analysis