The steady, increase in the demand for linear electrical machines in applications such as industrial robotics, transportation, manufacturing, and electrical power generation has been witnessed in recent times. Linear synchronous machines can be particularly operated without converting rotary motion to linear motion and have significant advantages such as simplicity, efficiency, positioning accuracy, and dynamic performance. Based on these advantages, this paper compares the characteristics of a double-sided permanent magnet linear synchronous generator (PMLSG). Since PMLSGs have significant influence on the manufacturing process and installation environment, it is important to estimate the lowest production cost and mass. Therefore, the analytical model of this paper concentrates on the comparison of the mass and efficiency based on different magnetization arrays while using the same stator. The PMLSG uses the commonly used vertical, Halbach array, which maximizes efficiency, and horizontal array that is easy to fabricate. A previous study highlights the excellence of Halbach arrays by exclusively using these arrays in the design. However, this study compares three magnetization arrays of the same size and rated output power considering the manufacturing cost and mass as mentioned above. As a result, the advantages of the horizontal array can be obtained. To compare the characteristics of the analytical model we use finite element analysis (FEA), which is essential for the electromagnetic analysis of linear generators. The FEA exhibits high reliability and accuracy when characterizing electrical equipment and it is excellent for the characterization of important electrical properties such as magnetic flux density, armature reaction, inductance, and induced voltage. Therefore, we establish the reliability and accuracy of the experimental results of the manufactured model by comparing them with the results of the three arrays obtained through FEA. Detailed analysis results and discussions of derived results will be presented in the final paper.
|Submitters Country||Republic of Korea|