Torque Ripple Reduction in Permanent-Magnetic BLDC Motor Using Optimum Design of Motor Structure
Subject Areas : electrical and computer engineering
M. R.
Alizadeh Pahlavani
1
Y.
Shahbazi Ayat
2
A.
Vahedi
3
(University of Science and Technology)
Keywords: BLDC motor AFPM motor electromagnetic torque torque ripple,
Abstract :
In this paper instantaneous electromagnetic torque computation is done for axial flux permanent-magnet brushless DC (BLDC) motor using Lorentz force theorem. In this method, back electro motive force (EMF) and currents of phases should be defined. A novel method is presented for calculation of back EMF harmonics using analytical method (AM). The analytical results are compared with results obtained from the finite element method (FEM). A good agreement is between AM and FEM. Computational time in AM is much less than FEM. Finally, for torque ripple reduction, some motor geometric parameters are optimized using AM.
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