Investigation of Vernier Machine Design with Hybrid Excitations and Ferrite Magnets

Recently, the fluctuating costs of rare earth materials have led to an increased interest in exploring alternative non-rare earth materials. The goal is to reduce costs in various applications. Among these applications, direct drive motors have received significant attention for their enhanced performance, and the vernier motor has emerged as a promising candidate due to its flux-modulation working principle. Nonetheless, the vernier motor’s drawback of a low power factor has been the subject of research investigation. Additionally, the utilization of rare-earth magnets unavoidably leads to increased costs. The utilization of a hybrid-excited winding in this study demonstrates its potential to enhance the power factor of the vernier motors. Additionally, this innovative approach offers another noteworthy advantage: an improved field weakening capability. These findings highlight the promising prospects of employing the hybrid-excited winding as an effective solution to optimize motor performance and achieve better energy efficiency in various applications.