Enhancement of Cogging Torque Reduction on Inset Permanent Magnet Generator by Using Magnet Edge Shaping Method

Abstract

This paper handled with the investigation of the cogging torque reduction method in Inset-Permanent Magnet Generators using fractional slot stator/rotor combination. Cogging torque of Inset-Permanent Magnet Generator is analyzed to be cut down by slot opening width reduction and permanent magnets shaping. Electromagnetic simulations of the Inset-PMG in this paper were implemented by applying finite element analysis. Finite element method magnetic (FEMM 4.2) tool is employed to determine and analyze the cogging torque. It can be proved that by mixing of slot opening reduction and permanent magnet shaping at a particular shoe height can diminish the cogging torque of Inset-Permanent Magnet Generator sharply.