access icon free Cogging torque minimisation in FSPM machines by right-angle-based tooth chamfering technique

Cogging torque in flux-switching permanent magnet (FSPM) machines dominates the whole torque ripples due to its special doubly salient structure and high air-gap PM flux density. In this study, the chamfering method of right angles is utilised in both stator and rotor sides of FSPM machines to suppress the cogging torque. First, an analytical expression of cogging torque, taking the influence of the introduced right angles into consideration, is derived. On the basis of the derived model, the optimal dimensions of right angles are obtained and verified by both finite element analysis and experiments. Besides, the impacts of the proposed technique on phase electro-motive force and electromagnetic torque are also evaluated. The predicted results indicate that the proposed technique can significantly reduce cogging torque in FSPM machines with negligible reduction of average torque.

Inspec keywords: electric potential; minimisation; finite element analysis; torque; stators; air gaps; rotors; permanent magnet machines

Other keywords: flux-switching permanent magnet machines; doubly salient structure; electromagnetic torque; cogging torque minimisation; FSPM machines; finite element analysis; analytical expression; torque ripples; cogging torque suppression; right-angle-based tooth chamfering technique; phase electromotive force; high air-gap PM flux density; stator sides; rotor sides

Subjects: a.c. machines; Finite element analysis; d.c. machines

http://iet.metastore.ingenta.com/content/journals/10.1049/iet-epa.2017.0718
Loading

Related content

content/journals/10.1049/iet-epa.2017.0718
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading