Title:
Detection of Rotor and Load Faults in BLDC Motors Operating Under Stationary and Non-Stationary Conditions

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dc.contributor.advisor Habetler, Thomas G.
dc.contributor.author Rajagopalan, Satish en_US
dc.contributor.committeeMember Bonnie H. Ferri
dc.contributor.committeeMember Christiaan Paredis
dc.contributor.committeeMember Divan, Deepak M.
dc.contributor.committeeMember Harley, Ronald G.
dc.contributor.department Electrical and Computer Engineering en_US
dc.date.accessioned 2006-09-01T19:29:51Z
dc.date.available 2006-09-01T19:29:51Z
dc.date.issued 2006-06-23 en_US
dc.description.abstract Brushless Direct Current (BLDC) motors are one of the motor types rapidly gaining popularity. BLDC motors are being increasingly used in critical high performance industries such as appliances, automotive, aerospace, consumer, medical, industrial automation equipment and instrumentation. Fault detection and condition monitoring of BLDC machines is therefore assuming a new importance. The objective of this research is to advance the field of rotor and load fault diagnosis in BLDC machines operating in a variety of operating conditions ranging from constant speed to continuous transient operation. This objective is addressed as three parts in this research. The first part experimentally characterizes the effects of rotor faults in the stator current and voltage of the BLDC motor. This helps in better understanding the behavior of rotor defects in BLDC motors. The second part develops methods to detect faults in loads coupled to BLDC motors by monitoring the stator current. As most BLDC applications involve non-stationary operating conditions, the diagnosis of rotor faults in non-stationary conditions forms the third and most important part of this research. Several signal processing techniques are reviewed to analyze non-stationary signals. Three new algorithms are proposed that can track and detect rotor faults in non-stationary or transient current signals. en_US
dc.description.degree Ph.D. en_US
dc.format.extent 4023628 bytes
dc.format.mimetype application/pdf
dc.identifier.uri http://hdl.handle.net/1853/11524
dc.language.iso en_US
dc.publisher Georgia Institute of Technology en_US
dc.subject Electric machines en_US
dc.subject Condition monitoring
dc.subject Eccentricity
dc.subject Spectrogram
dc.subject Wigner-Ville distribution
dc.subject Rotor faults
dc.subject Non-stationary
dc.subject Time-frequency distributions
dc.subject Wavelets
dc.subject.lcsh Wigner distribution en_US
dc.subject.lcsh Machinery Monitoring en_US
dc.subject.lcsh Brushless direct current electric motors en_US
dc.title Detection of Rotor and Load Faults in BLDC Motors Operating Under Stationary and Non-Stationary Conditions en_US
dc.type Text
dc.type.genre Dissertation
dspace.entity.type Publication
local.contributor.advisor Habetler, Thomas G.
local.contributor.corporatename School of Electrical and Computer Engineering
local.contributor.corporatename College of Engineering
relation.isAdvisorOfPublication 36c5ceca-e31b-42c3-a57a-77e1400ffb5f
relation.isOrgUnitOfPublication 5b7adef2-447c-4270-b9fc-846bd76f80f2
relation.isOrgUnitOfPublication 7c022d60-21d5-497c-b552-95e489a06569
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