A New Design Procedure for Rotor Laminations of Synchronous Reluctance Machines with Fluid Shaped Barriers

Federica Uberti,Loránd Szabó,Lucia Frosini

doi:10.3390/electronics11010134

Federica Uberti, Loránd Szabó + Show 1 more

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https://doi.org/10.3390/electronics11010134

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Abstract

A new procedure for the design and optimization of the rotor laminations of a synchronous reluctance machine is presented in this paper. The configuration of the laminations is symmetrical and contains fluid-shaped barriers. The parametrization principle is used, which executes variations in the lamination geometry by changing the position, thickness and shape of the flux barriers. Hence, the optimization procedure analyzes the various configurations through finite element simulations, by means of the communication between MATLAB and Flux 2D. In the post processing stage, the best geometry which optimizes mean torque, torque ripple, efficiency and power factor is selected. Once the best rotor configuration is defined, further investigations allow improving its performance by modifying the current angle, the stator winding and the thickness of the radial ribs.

Highlights

The scientific and research interest for the Synchronous Reluctance Machine (SynRM)has grown in the last ten years thanks to its superior performance in terms of efficiency compared to the induction machine, and its distinctive characteristics of a rotor without permanent magnets in it
Has grown in the last ten years thanks to its superior performance in terms of efficiency compared to the induction machine, and its distinctive characteristics of a rotor without permanent magnets in it
This paper shows that it is possible to reduce the motor current and increase the power factor by choosing a different number of turns per coil and changing the stack length

Summary

Introduction

Has grown in the last ten years thanks to its superior performance in terms of efficiency compared to the induction machine, and its distinctive characteristics of a rotor without permanent magnets in it These two features make SynRM possibly the best solution to meet high efficiency requirements without the additional costs and volatility of rare-earth permanent magnets. Another advantage is given by the little heat generated by the rotor, due to lack of winding, with consequent very low rotor losses and good thermal management [1]. SynRM offers a good torque density and a wide range of operating speeds [2]. These are the reasons why, starting from about 1990, several researches have concentrated on its design, with the aim of reducing the torque ripple and increasing the power factor

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