Linear consequent pole Halbach array flux reversal machine

• Main Authors: Mohammad Abdul Hakim Raihan, Nick Baker, Kristopher Smith, Ahmed Almoraya
• Format: Article
• Language: English
• Published: Wiley 2019-04-01
• Series: The Journal of Engineering
• Subjects: permanent magnets; magnetic flux; finite element analysis; linear machines; reluctance machines; stators; machine theory; permanent magnet motors; gears; permanent magnet machines; linear consequent pole Halbach array flux reversal machine; linear variable reluctance permanent magnet machine; LVRPM; armature; vertically magnetised PM pole; salient ferromagnetic iron pole; horizontal PMs; salient iron poles; variable reluctance machine; inherent magnetic gearing; conventional synchronous PM machines; machine parameters; conventional Vernier Hybrid machine; magnetic flux leakage; unit magnet mass
• Online Access: https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8110

This paper presents a linear variable reluctance permanent magnet (LVRPM) machine where the armature winding and inset Halbach array permanent magnets (PMs) are mounted on E-core stators. The Halbach array consists of a vertically magnetised PM pole and a salient ferromagnetic iron pole (split tooth) sandwiched between two horizontal PMs. The translator consists solely of laminations with salient iron poles. As a variable reluctance machine, it exhibits inherent magnetic gearing and a higher force and power density than the conventional synchronous PM machines. Finite element analysis (FEA) has been used to investigate the effect of machine parameters. The logical development of the LVRPM from the more conventional Vernier Hybrid machine is presented, including a near 50% reduction in magnetic flux leakage and a higher flux per unit magnet mass.