Development of low translator mass linear Vernier machine for wave energy power take off

Abstract

This article proposes a new topology of double-sided linear Vernier permanent magnet (LVPM) machine with segmented translator structure. A combination of a typical Halbach array consists of two horizontally magnetised permanent magnets (PMs) sandwiched between a salient iron tooth and adjacent vertically magnetised PM pole with the aim of improving its electromagnetic performance. The coreless partitioned translator contributes to a significant reduction in mass and the associated cost. With the aid of finite element analysis (FEA), two LVPM machines with the same PM, and stator volume have been investigated, analysed, and compared. The results imply that the proposed LVPM is capable of producing higher force density, while it exhibits lower cogging force and force ripple compared to its counterpart.

Keywords

• linear machines
• permanent magnet machines
• permanent magnets
• finite element analysis
• stators
• magnetisation
• low translator mass
• vernier machine
• wave energy power
• double-sided linear vernier permanent magnet machine
• segmented translator structure
• typical halbach array
• horizontally magnetised permanent magnets
• salient iron tooth
• adjacent vertically magnetised pm pole
• coreless partitioned translator
• lvpm machines