Analytical model of a permanent magnet brushless DC motor with non-linear ferromagnetic material

Author

Dalal, Ankit ; Kumar, Pranaw

Author_Institution

Dept. of Electron. & Electr. Eng., Indian Inst. of Technol. Guwahati, Guwahati, India

fYear

2014

fDate

2-5 Sept. 2014

Firstpage

2674

Lastpage

2680

Abstract

This paper presents an analytical model for determining air-gap radial and tangential magnetic field in permanent magnet brushless dc (PMBLDC) motor. The solution is based on two-dimensional analysis in polar coordinates for radially magnetized magnet. Effects caused due to non-linear behavior of the stator ferromagnetic yoke are mainly considered. Radial and tangential magnetic field, back emf and cogging torque are calculated and are validated with finite element results. The finite element analysis demonstrates the accuracy of the developed analytical model of PMBLDC motor for no load magnetic field calculation.

Keywords

brushless DC motors; electric potential; ferromagnetic materials; finite element analysis; machine insulation; permanent magnet motors; stators; torque motors; PMBLDC motor; air-gap; back emf; cogging torque; ferromagnetic yoke; finite element analysis; nonlinear ferromagnetic material; permanent magnet brushless DC motor; polar coordinates; radial magnetic field; radially magnetized magnet; stator; tangential magnetic field; two-dimensional analysis; Air gaps; Analytical models; Magnetic materials; Permanent magnet motors; Rotors; Stator windings; Brushless motors; cogging torque; magnetic fields; magnetic materials; magnetic permeability; magnetization; permanent magnet motors;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines (ICEM), 2014 International Conference on

Conference_Location

Berlin

Type

conf

DOI

10.1109/ICELMACH.2014.6960566

Filename

6960566