Shahed University

Optimal design and verification of interior permanent magnet synchronous generator based on FEA and Taguchi method

Mohammadreza Besmi | Seyyed Reza karimpour | Seyyed Mehdi Mirimani

Date :  2020/07/30
Publish in :    International Transactions on Electrical Energy Systems

Keywords :finite element method, interior permanent magnet machine, multi-objective optimization design, orthogonal matrix, Taguchi meth

Abstract :
Abstract Background: Permanent magnet machines can be used for many applications, due to their high power density, high efficiency, observable torque-tocurrent ratio, and low maintenance cost. As such, the generator design in wind turbine systems is highly dependent on improvement of efficiency and generator performance. Thus, in order to improve the quality of manufactured electrical machines, a robust and precise optimization model should be developed to substitute the traditional deterministic models. Purpose: This paper investigated the optimization design process of an interior permanent magnet synchronous generator (IPMSG) for wind power systems using the finite element analysis (FEA) based on a prototype IPMSG. To that end, a multi-objective optimization design of a permanent magnet generator (PMG) based on Taguchi method was proposed. Design/Method: The influence of the pole arc angle, magnet inset, magnet thickness, magnet width, and stator tooth width as well as slot depth were considered as the design parameters. The main characteristics of generator efficiency, total harmonic distortion (THD) and the amplitude of induction electromotive force (EMF) were taken as the optimization objectives, as well. The orthogonal matrix was established based on the number of the selected variables and the level factor of each variable, and finite element method (FEM) was, in turn, applied to solve the experimental matrix. As a result, an improved generator with higher maximum efficiency and EMF and lower THD was designed. Conclusions: Finally, the prototype IPMSG which was manufactured based on the analysis results and Taguchi method was tested. The experimental tests