A high-performance electric motor without rare-earth magnets for automated ground vehicles

With the world's increasing environmental concerns, sustainable energy solutions have received a lot of attention, particularly for electric vehicle (EV). The majority of electric vehicle motors now employ rare-earth elements, which are in short supply. Hence, the objective of this report is to...

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Main Author: Goh, Jun wei
Other Authors: Christopher H. T. Lee
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2022
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Online Access:https://hdl.handle.net/10356/157740
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1577402023-07-07T19:04:34Z A high-performance electric motor without rare-earth magnets for automated ground vehicles Goh, Jun wei Christopher H. T. Lee School of Electrical and Electronic Engineering Schaeffler Joint Lab Process Instrumentation Lab chtlee@ntu.edu.sg Engineering::Electrical and electronic engineering With the world's increasing environmental concerns, sustainable energy solutions have received a lot of attention, particularly for electric vehicle (EV). The majority of electric vehicle motors now employ rare-earth elements, which are in short supply. Hence, the objective of this report is to investigate the use of non-rare-earth materials in achieving high-performance levels for AGV applications. This report had highlighted various types of electric motors used in low-speed AGV applications and focus on magnetic geared machines (MGM) that work on the concept of flux modulation. New MGM solutions using non-rare earth material were presented based on the analysis of different rare-earth magnet vernier machines that produce high torque density. The torque density, efficiency, and power factor were then used to evaluate the performance of the motors after they were simulated using JMAG software. The spoke-array PM vernier machine was discovered to have exhibited a high torque density suitable for the direct-drive application. Different gear ratios were used to evaluate the performance of the motor. However, due to the flux barrier effect, the torque performance was limited. To alleviate the flux barrier effect, another interesting option for direct drive use was the spoke-array vernier machine with an alternative flux bridge. The flux bridge may overcome the flux barrier effect discussed in this paper, resulting in an increased torque density. However, the torque performance was reduced to improve the power factor of the machine. Further efforts have been made to improve the torque performance and it was found that the double-spoke array Vernier machine exhibits the highest torque density among its counterparts. Bachelor of Engineering (Electrical and Electronic Engineering) 2022-05-22T06:28:36Z 2022-05-22T06:28:36Z 2022 Final Year Project (FYP) Goh, J. W. (2022). A high-performance electric motor without rare-earth magnets for automated ground vehicles. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/157740 https://hdl.handle.net/10356/157740 en A1031-211 - application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Electrical and electronic engineering
spellingShingle Engineering::Electrical and electronic engineering
Goh, Jun wei
A high-performance electric motor without rare-earth magnets for automated ground vehicles
description With the world's increasing environmental concerns, sustainable energy solutions have received a lot of attention, particularly for electric vehicle (EV). The majority of electric vehicle motors now employ rare-earth elements, which are in short supply. Hence, the objective of this report is to investigate the use of non-rare-earth materials in achieving high-performance levels for AGV applications. This report had highlighted various types of electric motors used in low-speed AGV applications and focus on magnetic geared machines (MGM) that work on the concept of flux modulation. New MGM solutions using non-rare earth material were presented based on the analysis of different rare-earth magnet vernier machines that produce high torque density. The torque density, efficiency, and power factor were then used to evaluate the performance of the motors after they were simulated using JMAG software. The spoke-array PM vernier machine was discovered to have exhibited a high torque density suitable for the direct-drive application. Different gear ratios were used to evaluate the performance of the motor. However, due to the flux barrier effect, the torque performance was limited. To alleviate the flux barrier effect, another interesting option for direct drive use was the spoke-array vernier machine with an alternative flux bridge. The flux bridge may overcome the flux barrier effect discussed in this paper, resulting in an increased torque density. However, the torque performance was reduced to improve the power factor of the machine. Further efforts have been made to improve the torque performance and it was found that the double-spoke array Vernier machine exhibits the highest torque density among its counterparts.
author2 Christopher H. T. Lee
author_facet Christopher H. T. Lee
Goh, Jun wei
format Final Year Project
author Goh, Jun wei
author_sort Goh, Jun wei
title A high-performance electric motor without rare-earth magnets for automated ground vehicles
title_short A high-performance electric motor without rare-earth magnets for automated ground vehicles
title_full A high-performance electric motor without rare-earth magnets for automated ground vehicles
title_fullStr A high-performance electric motor without rare-earth magnets for automated ground vehicles
title_full_unstemmed A high-performance electric motor without rare-earth magnets for automated ground vehicles
title_sort high-performance electric motor without rare-earth magnets for automated ground vehicles
publisher Nanyang Technological University
publishDate 2022
url https://hdl.handle.net/10356/157740
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