Design and Comparison of Induction Motor and Synchronous Reluctance Motor for Variable Speed Applications: Design Aided by Differential Evolution and Finite Element Analysis

The advances in power electronics devices have opened the possibility of counting on Synchronous Reluctance Motors (SRM) in applications where variations of speed are required. Evidently, for many years the Induction Motors (IM) have successfully supplied this demand, and they have become in undeniable leaders in the field. The strategy preferred to control both motors is based upon vector control, which allows them to operate in a wide range of speed. The necessity of having motors with low-cost and robust construction opened up to discussion and comparison between these two types of motors.In this study, a new approach based upon the Differential Evolution (DE) Algorithm was developed in order to design a 55Kw Induction Motor for variable speed applications, posteriorly, the performance of the final design was optimized by means of Finite Element Method (FEM) and evaluated through Indirect Field Oriented Current Control (IFOCC) strategy. Likewise, an equivalent Synchronous Reluctance Motor with inductance ratio in the range of 6-10 was also designed by using the same stator than the Induction Motor. A Vector Control (VC) strategy based upon the point of maximum power factor was implemented to test its performance. Initial sizing and torque density optimization of an Inverter-driven Induction Motor were performed by using a novel algorithm based upon the Differential Evolution paradigm, the resultant geometry demonstrated containing the transient and steady state responses desired. Finally, both motors optimized for variable speed applications were compared under the same variations of load, voltage and frequency in order to assess their consumption from an input apparent power point of view. By assuming a limit for the input power through the same Variable Frequency Driver (VFD), the Induction Motor was able to bear a higher overload, whereas the Synchronous Reluctance Motor compared favorably and showed lower power consumption in average under intermittent loads. It has been proved the feasibility of using Differential Evolution paradigm (DE) to lead the design of Inverter-driven Induction Motors. Furthermore, in being compared the aforementioned motors, the results suggest that there is no need to oversize the Variable Frequency Drive (VFD) in using the Synchronous Reluctance Motor (SRM) in spite of its modest power factor, the outcomes also demonstrate that the only disadvantage in the Synchronous Reluctance Motor is a lower overload capability of about 5%-10% with respect to the Inverter-driven Induction Motor designed through the Differential Evolution paradigm.

Name thesis:degree_name

Master of Science

Level thesis:degree_level

masters

Discipline thesis:degree_discipline

Electrical and Computer Engineering

Grantor dc:publisher

The Ohio State University

Year dc:date

2013

Author dc:creator

• Pina Ortega , Alejandro Jose

Contributors dc:contributor

• Xu, Longya

• Electrical Engineering
• Synchronous Reluctance Motor
• Induction Motor
• Field Oriented Control
• Vector Control
• Differential Evolution
• Evolutionary Algorithms

Statement dc:rights

• unrestricted
• This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.

Language dc:language

English

Repository record dc:identifier

http://rave.ohiolink.edu/etdc/view?acc_num=osu1365429279

OAI identifier oai:identifier

oai:etd.ohiolink.edu:osu1365429279