Title:
Utilizing the connected power electronic converter for improved condition monitoring of induction motors and claw-pole generators

dc.contributor.advisor Habetler, Thomas G.
dc.contributor.author Cheng, Siwei en_US
dc.contributor.committeeMember Grijalva, Santiago
dc.contributor.committeeMember Harley, Ronald
dc.contributor.committeeMember Mayor, J. Rhett
dc.contributor.committeeMember Zhang, Ying
dc.contributor.department Electrical and Computer Engineering en_US
dc.date.accessioned 2012-06-06T16:43:02Z
dc.date.available 2012-06-06T16:43:02Z
dc.date.issued 2012-03-27 en_US
dc.description.abstract This dissertation proposes several simple, robust, and non-intrusive condition monitoring methods for induction motors fed by closed-loop inverters and claw-pole generators with built-in rectifiers. While the flexible energy forms synthesized by power electronic converters greatly enhance the performance and expand the operating region of induction motors and claw-pole generators, they also significantly alter the fault behavior of these electric machines and complicate the fault detection and protection. In this dissertation, special characteristics of the connected closed-loop inverter and rectifier have been thoroughly analyzed, with particular interest in their impact on fault behaviors of the induction motor and the claw-pole generator. Based on the findings obtained from the theoretical and experimental analysis, several sensorless thermal, mechanical, and insulation monitoring methods are proposed by smartly utilizing special features and capabilities of the connected power electronic converter. A simple and sensitive stator turn-fault detector is proposed for induction motors fed by closed-loop inverter. In addition, a stator thermal monitoring method based on active DC current injection and direct voltage estimation is also proposed to prevent the closed-loop controlled induction motors from thermally overloading. The performance of both methods is demonstrated by extensive experimental results. Methods to detect serpentine belt slip, serpentine belt defect, rotor eccentricity have been proposed for claw-pole generators using only the available electric sensor information. Methods to detect and protect stator turn faults in claw-pole generators are also presented in this dissertation. Lastly, a novel method to detect the generalized bearing roughness fault is proposed. All the proposed condition monitoring techniques have been validated by experimental results. en_US
dc.description.degree PhD en_US
dc.identifier.uri http://hdl.handle.net/1853/43638
dc.publisher Georgia Institute of Technology en_US
dc.subject Induction motor en_US
dc.subject Claw-pole generator en_US
dc.subject Condition monitoring en_US
dc.subject Fault diagnostics en_US
dc.subject Power electronic converter en_US
dc.subject.lcsh Electric motors, Induction
dc.subject.lcsh Electric machinery, Induction
dc.subject.lcsh Machinery Monitoring
dc.subject.lcsh Fault location (Engineering)
dc.subject.lcsh Electric fault location
dc.title Utilizing the connected power electronic converter for improved condition monitoring of induction motors and claw-pole generators 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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