NDLI: A Stator-Core Quality-Assessment Technique for Inverter-Fed Induction Machines

Content Provider	IEEE Xplore Digital Library
Author	Kwanghwan Lee Jongman Hong Kwang-Woon Lee Sang Bin Lee Wiedenbrug, E.J.
Copyright Year	1972
Abstract	Localized heating caused by damage in the laminations or interlaminar insulation of the stator core increases the core losses and can lead to machine failure. Therefore, it is important to monitor the quality of the stator core for reliable and efficient operation of the machine. The methods currently available for core quality assessment are inconvenient since they require an outage and the machine to be disassembled or operated under no-load conditions. In this paper, a new method for monitoring the quality of the stator core for inverter-fed machines without motor disassembly or operation is proposed. The main concept is to use the inverter to apply a set of test signals to assess the quality of the core whenever the motor is at standstill. A set of high-frequency pulsating magnetic fields is produced using the inverter, and the power loss is observed as a function of field circumferential position to detect core problems. An experimental study on a 10-hp induction motor verifies that local interlaminar core faults can be detected with high sensitivity. The proposed technique is expected to provide a simple solution for frequent stator-core quality assessment without motor disassembly, motor operation, or additional hardware for reliable and efficient operation of inverter-fed induction machines.
Sponsorship	IEEE Industry Applications Society
Starting Page	213
Ending Page	221
Page Count	9
File Size	1243951
File Format	PDF
ISSN	00939994
Volume Number	46
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Induction machines Stator cores Magnetic cores Induction motors Condition monitoring Quality assessment Inverters Heating Lamination Insulation stator core AC machine condition monitoring core loss diagnostics eddy-current loss hysteresis loss induction motor interlaminar-insulation failure inverter
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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