Analysis of two-part rotor, axial flux permanent magnet machines

Author

Giangrande, Paolo ; Cupertino, Francesco ; Pellegrino, Gianmario ; Ronchetto, Davide ; Gerada, Chris ; Sumner, Mark

Author_Institution

DEE, Politec. di Bari, Bari, Italy

fYear

2011

fDate

17-22 Sept. 2011

Firstpage

1576

Lastpage

1581

Abstract

This paper presents a study of the effects obtained when a portion of permanent magnet material is replaced by a soft magnetic composite piece over the rotor poles of an axial flux machine. This technical solution can be adopted to increase the machine inductance in order to limit short circuit currents or to increase the motor saliency and implement sensorless control schemes based on high frequency signal injection. Some design rules for the design of the soft magnetic poles have been derived in order to obtain the desired inductance and/or saliency. The analysis has been validated with finite element analisys and numerical simulations using Matlab/Simulink environment. Some preliminary experimental results have also been reported.

Keywords

finite element analysis; permanent magnet machines; rotors; sensorless machine control; soft magnetic materials; axial flux permanent magnet machines; finite element analysis; machine inductance; motor saliency; numerical simulations; piece over the rotor poles; sensorless control schemes; soft magnetic composite; soft magnetic poles; two part rotor; Iron; Magnetic flux; Magnetic separation; Rotors; Sensorless control; Soft magnetic materials; Torque;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion Congress and Exposition (ECCE), 2011 IEEE

Conference_Location

Phoenix, AZ

Print_ISBN

978-1-4577-0542-7

Type

conf

DOI

10.1109/ECCE.2011.6063970

Filename

6063970