Sub-domain analytical model for armature reaction field of permanent magnet vernier machine. Issue 2 (7th March 2016)

• Record Type: Journal Article
• Authors: Oner, Y.; Zhu, Z.Q.; Wu, L. J.; Ge, X.
• Editors: Zhu, Z.Q.
• Is Part Of: Compel. Volume 35:Issue 2(2016)
• Page Start: 821
• Page End: 831
• Publication Date: 2016-03-07
• Subjects: Analytical methods -- FEA -- Permanent magnets -- Finite element analysis -- Analytical calculation -- Permanent magnet vernier machine -- Armature reaction -- Sub-domain model -- Inductance; Electrical engineering -- Data Processing -- Periodicals; Electrical engineering -- Mathematics -- Periodicals; Electrical engineering -- Periodicals; Electronics -- Data Processing -- Periodicals; Electronics -- Mathematics -- Periodicals; 621.3
• DOI: 10.1108/COMPEL-11-2015-0421
• Languages: English
• ISSNs: 0332-1649

Abstract

Abstract : Purpose: – An analytical sub-domain model is developed for predicting the armature magnetic field in permanent magnet vernier machine (PMVM) which has either non-overlapping or overlapping windings. The developed model accounts for tooth-tips and flux modulation pole slots (FMPs). The paper aims to discuss these issues. Design/methodology/approach: – It is obtained by solving Poisson's and Laplace's equations in polar coordinates for each sub-domain, i.e. air gap, slots, slot openings at tooth-tips and FMP slots. Armature reaction field distributions in slots, slot openings FMPs, air-gap and magnet region and winding inductances are obtained from the analytical method and compared by finite element analysis. Findings: – It is found that the developed model can be employed to accurately predict the armature field and winding inductance for any combination of slots/FMPs/permanent magnets. In addition, it is observed that the winding inductance is high which results in significant armature reaction and poor power factor in PMVM. Originality/value: – The main contributions include: first, accurate sub-domain model for PMVM is proposed for armature reaction which is not addressed in literature; second, the model accounts the interaction between FMP and slot; and finally, developed sub-domain model is also used for inductance calculation.