Comparative Analysis of Permanent Magnet Synchronous Generators with Mechanical Energy Storage according to Machine Types

Abstract

This paper deals with the comparative investigation on the performance of various permanent magnet wind power generators according to magnetization patterns and stator coil winding types for wind power applications. With slotless stator core structure, vertical and Halbach magnetization patterns are applied to the three types of coil pitch windings. Based on finite element method, the electromagnetic field analysis is performed, and one of the analysis models is manufactured for its experimental verification. In this study, the machines have almost identical values of induced voltage and resistance which are considered as important equivalent circuit parameters, so their reasonable comparison can be made. Besides, since the generators are integrated with a mechanical energy storage system, the influence of the energy storage on the generator performance is addressed based on the measured phase current including harmonics. From the analysis results presented in this study, the better choice by considering machine topology is proposed.