Analytical On-Load Subdomain Field Model of Permanent-Magnet Vernier Machines

ÖNER Y., Zhu Z. Q., Wu L. J., Ge X., Zhan H., Chen J. T.

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, vol.63, no.7, pp.4105-4117, 2016 (SCI-Expanded) identifier identifier


Permanent-magnet vernier machine (PMVM) is a relatively new type of PM machines. An analytical subdomain model accounting for tooth-tips and flux modulation poles is developed to accurately predict on-load field distributions in PMVMs. Based on two-dimensional (2-D) polar coordinate and magnetic vector potential, this method solves the Maxwell's equations in slot, air-gap, flux modulation pole slot (FMPS), and PM regions. Consequently, the electromagnetic performance such as cogging torque, back-electromotive force (EMF), electromagnetic torque, power factor, and magnet loss are calculated. In addition, the model can also be used for the evaluation of demagnetization withstand capability. The finite-element analysis (FEA) and experimental results validate the accuracy of the developed analytical model.