Analysis of a single-phase, quasi-halbach magnetised tubular permanent magnet motor with non-ferromagnetic support tube.

• Main Authors: Ibrahim, Taib, Wang, Jiabin, Howe, Dave
• Format: Conference or Workshop Item
• Published: 2008
• Subjects: TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://eprints.utp.edu.my/1108/1/Full_paper_PEMD2008.pdf; http://eprints.utp.edu.my/1108/

The paper describes the analysis of a short stroke, single phase quasi-Halbach magnetised tubular permanent magnet linear motor with non- ferromagnetic tube. The open-circuit magnetic field distribution is established analytically in terms of a magnetic vector potential formulated in the cylindrical coordinate system. The analytical field solution allows the prediction of flux linkage, back-emf and thrust force of the linear motor in closed forms and facilitates design optimisation. The analytically results are validated by finite elements analyses. A prototype linear motor has been constructed and the static performance test has been carried out. The experimental results have validated the predictions. Performance comparison is also given with a design variant which employs a ferromagnetic supporting tube.