Abstract
Substantial increase in energy consumption in all around the world has led to researchers to need to produce electrical machines with high energy efficiency since majority of energy has been consumed at industry, especially by electrical machines. Among electrical machines, the Synchronous Reluctance Machines (SynRMs) have been preferred to investigate in recent years due to lack of Induction Machines (IMs) in terms of efficiency and high price of the Permanent Magnet Synchronous Machines (PMSMs). In this study, the Finite Element Analysis (FEA) showing the effects of phase angle of current, number of flux barriers, starting diameter of flux barriers, and ribs on machine performance of 22 kW Transversally Laminated Anisotropic (TLA)-SynRM with distributed winding have been carried out in ANSYS Electronics. The design is based on creating a novel rotor considering these rotor parameters since the utilized SynRM consists of same stator with same sized 22 kW IM. The performance of the machine has been investigated through torque, torque ripple, efficiency, saliency, and power factor. Moreover, the effect of the phase angle of the current on the machine performance and the comparison of the 22 kW-SynRM with the same sized and powered IM and with a different SynRM have been carried out in this study. This study has concluded that although the novel SynRM has high torque ripple values, it is better than the IM due to lack of copper losses of rotor and the previously utilized SynRM considering their efficiency classes. The efficiency class of novel SynRM is IE4, whereas that for utilized IM and previously created SynRM are IE1 and IE3, respectively.
Highlights
Energy consumption is one of the major problems concerned of 21st century due to a considerable increment in energy demand
The aim of this paper is to create an optimum rotor structure of Transversally Laminated Anisotropic (TLA)-type seen in Fig. 1, 22 kW Synchronous Reluctance Machines (SynRMs) that falls within IE4 Super-Premium efficiency class with an acceptable torque ripple considering the effects of phase angle of current, number of flux barriers, starting diameter of these barriers, and tangential and radial ribs on machine performance
The effects of the phase angle of current, flux barrier numbers, starting diameter of these barriers, radial and tangential ribs on performance of 22 kW-TLA type SynRM are analysed with Finite Element Analysis (FEA)
Summary
Energy consumption is one of the major problems concerned of 21st century due to a considerable increment in energy demand. SynRMs have cooler shaft and bearings leading to longer lifetime and low maintenance requirement because they do not include windings in their rotor [9] These machines can reach up to 82 % produced torque by IMs with 50 % less copper loss. The aim of the optimization is to obtain appropriate rotor design with better power factor, lower torque ripple, and higher efficiency comparing with unoptimized structure. The aim of this paper is to create an optimum rotor structure of TLA-type seen, 22 kW SynRM that falls within IE4 Super-Premium efficiency class with an acceptable torque ripple considering the effects of phase angle of current, number of flux barriers, starting diameter of these barriers, and tangential and radial ribs on machine performance.
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