Design and Optimization of a 4–6 Brushless Doubly Fed Reluctance Generator

Abstract

This paper provides an outline of the brushless doubly fed reluctance machine (BDFRM) design process, in-cluding the complex rotor selection and dual three-phase stator windings. The presented outline aims to streamline the calculation process for the D2L design coefficient, offering a more simplified approach. In this paper, insights regarding the rotor topology selection process, investigating optimal flux barrier layouts, electric loadings and airgap flux density, are presented. Also, an analytical design methodology for an 11 kW BDFRM in a D225M frame, followed by its optimization utilizing the NSGA-II (non-dominated sorting genetic algorithm II), is given. The results show that the BDFRM achieves a very low torque ripple due to the use of a ducted hyperbolic-polyline flux barrier rotor.