International Journal of Power Electronics and Drive System (IJPEDS) Vol. 8, No. 1, March 2017, pp. 213~221 ISSN: 2088-8694, DOI: 10.11591/ijpeds.v8i1.pp213-221  213 Journal homepage: http://iaesjournal.com/online/index.php/IJPEDS Analysis of Three and Five-phase Double Stator Slotted Rotor Permanent Magnet Generator (DSSR-PMG) R. Suhairi 1 , R. N. Firdaus 2 , F. Azhar 3 , K. A. Karim 4 , A. Jidin 5 , A. Khamis 6 , Z. Ibrahim 7 , T. Sutikno 8 1,2,3,4,5,6,7 Faculty of Electrical Engineering, Universiti Teknikal Malaysia Melaka (UTeM), Malaysia. 1,2,3,4,5,6,7 Electrical Machine Design, Power Electronics and Drives Research Group, CeRIA, UTeM, Malaysia 1 Electrical Technology Section, Universiti Kuala Lumpur-British Malaysian Institute, Malaysia 8 Department of Electrical Engineering, Universitas Ahmad Dahlan, Indonesia Article Info ABSTRACT Article history: Received Oct 08, 2016 Revised Dec 14, 2016 Accepted Dec 24, 2016 This paper discusses the performance of three and five-phase double stator slotted rotor permanent magnet generator (DSSR-PMG). The objective of this research is to propose five-phase DSSR-PMG structure that could minimize output voltage ripple compared to three phase. In this research Finite Element Analysis (FEA) is used to simulate the characteristic of the three and five-phase permanent magnet generator at various speeds. The characteristic of back-EMF, flux linkage, cogging torque and flux density for three and five-phase configurations is presented. As a result, five-phase DSSR-PMG shows a lower cogging torque and voltage ripple compared to three-phase. The cogging torque for five-phase is 80% lower than three- phase DSSR-PMG and the ripple voltage (peak to peak) of back-EMF in five-phase is 2.3% compared to the three-phase DSSR-PMG which is 55%. Keyword: Double stator Permanent magnet Slotted rotor Copyright © 2017 Institute of Advanced Engineering and Science. All rights reserved. Corresponding Author: R. N. Firdaus, Faculty of Electrical Engineering, Universiti Teknikal Malaysia, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, Malaysia. Email: norfirdaus@utem.edu.my 1. INTRODUCTION Generally, electrical generator is a device that converts mechanical energy obtained from an external source into electrical energy as an output. Permanent Magnet Generator is a generator that has many advantages such as high power coefficient and high efficiency. It can also operates at high speed applications. Various works have been carried out to analyse, model and characterize the performance of high power density generator. Some of them are determined for loss evaluation and design optimisation for direct driven PMG using simulation [1]. A few researchers intensively studied on the three-phase double stator permanent magnet generator that can produce higher power density and torque density. Nevertheless, most of them usually focus on the design optimisation of PMG for wind turbine application and for hybrid vehicles [2]-[9]. M. Norhisam et. al presents comparative evaluations on the power density of several types of double stator slot and slot-less topology of PMG that are purposely designed for agriculture sectors [10]. The power density evaluation is very important in order to design a portable PMG that is smaller, lightweight as well as high output power. In addition, double stator topology could maximize the usage of flux linkage which could increase power density [11]. A new structure for double stator brushless DC motor with thick pole shoe was proposed to improved energy [12]. However, the research only covered for single phase topology. In addition, many researchers study on five-phase machine modeling, but most of them are focusing on induction and synchronous machine [13]-[15]. None of them is conducting the study on the five-phase Double Stator Slotted Rotor Permanent Magnet Generator (DSSR-PMG). Most of them focused on the permanent magnet synchronous multiphase generators [16]-[18] that may have prospect for applications in