Modified Slot Opening for Reducing Shaft-to-Frame Voltage of AC Motors

Modified Slot Opening for Reducing Shaft-to-Frame Voltage of AC Motors

This paper presents a method to reduce the winding-to-rotor capacitance of electrical machines for the purpose of suppressing shaft-to-frame voltage, which causes reliability issues, such as electromagnetic interference (EMI) and bearing current. The proposed method is based on the modification of s...

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Bibliographic Details
Main Authors: Manje Yea, Ki Jin Han
Format: Article
Language:English
Published: MDPI AG 2020-02-01
Series:Energies
Subjects:
shaft voltage
bearing current
electrical machines
Online Access:https://www.mdpi.com/1996-1073/13/3/760
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spelling doaj-e7e7714c37234604bbc0127263e2bb312020-11-25T02:11:40ZengMDPI AGEnergies1996-10732020-02-0113376010.3390/en13030760en13030760Modified Slot Opening for Reducing Shaft-to-Frame Voltage of AC MotorsManje Yea0Ki Jin Han1School of Electrical and Computer Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, KoreaDivision of Electronics and Electrical Engineering, Dongguk University, Seoul 04620, KoreaThis paper presents a method to reduce the winding-to-rotor capacitance of electrical machines for the purpose of suppressing shaft-to-frame voltage, which causes reliability issues, such as electromagnetic interference (EMI) and bearing current. The proposed method is based on the modification of slot opening shape of the stator core, including the variation of slot opening width and the use of oblique slot opening. For the verification of the suggested method, six different slot opening shapes, including a reference design, are analyzed and compared using finite element analysis, and the results show that the proposed method can reduce the shaft-to-frame voltage by 98%, compared to the reference design.https://www.mdpi.com/1996-1073/13/3/760shaft voltagebearing currentelectrical machines
collection DOAJ
language English
format Article
sources DOAJ
author Manje Yea
Ki Jin Han
spellingShingle Manje Yea
Ki Jin Han
Modified Slot Opening for Reducing Shaft-to-Frame Voltage of AC Motors
Energies
shaft voltage
bearing current
electrical machines
author_facet Manje Yea
Ki Jin Han
author_sort Manje Yea
title Modified Slot Opening for Reducing Shaft-to-Frame Voltage of AC Motors
title_short Modified Slot Opening for Reducing Shaft-to-Frame Voltage of AC Motors
title_full Modified Slot Opening for Reducing Shaft-to-Frame Voltage of AC Motors
title_fullStr Modified Slot Opening for Reducing Shaft-to-Frame Voltage of AC Motors
title_full_unstemmed Modified Slot Opening for Reducing Shaft-to-Frame Voltage of AC Motors
title_sort modified slot opening for reducing shaft-to-frame voltage of ac motors
publisher MDPI AG
series Energies
issn 1996-1073
publishDate 2020-02-01
description This paper presents a method to reduce the winding-to-rotor capacitance of electrical machines for the purpose of suppressing shaft-to-frame voltage, which causes reliability issues, such as electromagnetic interference (EMI) and bearing current. The proposed method is based on the modification of slot opening shape of the stator core, including the variation of slot opening width and the use of oblique slot opening. For the verification of the suggested method, six different slot opening shapes, including a reference design, are analyzed and compared using finite element analysis, and the results show that the proposed method can reduce the shaft-to-frame voltage by 98%, compared to the reference design.
topic shaft voltage
bearing current
electrical machines
url https://www.mdpi.com/1996-1073/13/3/760
work_keys_str_mv AT manjeyea modifiedslotopeningforreducingshafttoframevoltageofacmotors
AT kijinhan modifiedslotopeningforreducingshafttoframevoltageofacmotors
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