Characteristic Analysis and Experimental Verification for a Double-Sided Permanent Magnet Linear Synchronous Generator According to Magnetization Array

This paper compares the characteristics of a double-sided small-scale permanent magnet linear synchronous generator (PMLSG) using three different magnetization arrays. Though PMLSGs generally prefer a parallel array, we propose the Halbach array and an axial array, which are widely used in permanent magnet devices. For an accurate comparison, the output power, mechanical air-gap thickness, and overall size are all equal. On the basis of analytical two-dimensional field solutions, this study predicts magnetic fields, losses, masses, and output powers of the three arrays. The experimental results are validated extensively by comparing them with finite element analysis results. This result shows the best arrangement of a double-sided small-scale PMLSG compared to the experimental results.