Title :
Evaluation of brushless permanent magnet motor rotor configurations for square wave current excitation
Author :
Vyas, Rajeev ; Murthy, Sunil ; Sebastian, Tomy
Author_Institution :
Adv. Eng. Center, Delphi Saginaw Steering Syst., MI, USA
Abstract :
This paper evaluates different rotor configurations for 120 degree square wave current excited motor, or the trapezoidal back emf type permanent magnet (PM) motor. A two dimensional finite element analysis (FEA) method along with an averaging technique is used to evaluate the motor torque. The rotor structures considered here are rotors with various magnet arc widths (surface mounted magnets) and also rotors with various magnet arc widths with the interpolar region filled with soft magnetic material (inset magnet rotor). Three different rotor structures are fabricated and experimental results from the three motors are provided
Keywords :
AC motors; brushless machines; finite element analysis; machine theory; permanent magnet motors; rotors; soft magnetic materials; torque; 120 degree square wave; averaging technique; brushless permanent magnet motor; inset magnet rotor; interpolar region; magnet arc widths; motor torque evaluation; rotor configurations; soft magnetic material; square wave current excited motor; surface mounted magnets; trapezoidal back emf PM motor; two dimensional finite element analysis; Current measurement; Magnetic analysis; Magnetosphere; Permanent magnet motors; Phase measurement; Rotation measurement; Rotors; Soft magnetic materials; Stators; Torque measurement;
Conference_Titel :
Power Electronics, Drives and Energy Systems for Industrial Growth, 1996., Proceedings of the 1996 International Conference on
Conference_Location :
New Delhi
Print_ISBN :
0-7803-2795-0
DOI :
10.1109/PEDES.1996.536391
