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

1 -
2 -
3 - University of Science and Technology

Received: 2017-07-17 Accepted : 2017-07-17 Published : 2017-06-21

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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Torque Ripple Reduction in Permanent-Magnetic BLDC Motor Using Optimum Design of Motor Structure