Linear tubular permanent magnet motor for an electromagnetic active suspension system
Ki‐Hoon Kim, Dong-Kyun Woo
Abstract
Abstract This work presents the comparative study of the linear tubular permanent magnet motor (LTPMM) for the active suspension system in vehicles. To analyse and design the LTPMM, a finite element‐based optimisation process is proposed. Since the proposed method reconstructs the entire field by storing the information of the air‐gap magnetic flux distribution in the form of a snapshot, it provides high accuracy and a reduced computation time. The magnetic fields are analysed in LTPMMs with external and internal permanent magnets that are classified according to the position of the permanent magnet. In the comparative analysis, an optimal model for the LTPMM is presented, taking into account characteristics such as thrust, detent force and THD. Especially, various magnetisation patterns are considered to accomplish high force density. The analytical model is verified by performing finite element analysis and experiments.