{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/78380"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/78380","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"An investigation of electronic pole changing in high inverter count induction machines","abstract":"The design of powerful and compact electric machines in highly dynamic applications such as electric traction and integrated starter/generators is an extremely difficult engineering challenge. Use of conventional machine designs with components designed for fixed voltage and frequency operation, unfortunately, do not make things any easier. By embracing recent advancements in the cost, performance, and reliability of power electronics and utilizing machine designs that are able to fully utilize the flexibility available from power electronics-based sources, interesting and potentially superior machine design solutions become available. This dissertation examines the feasibility and advantages of one such solution: electronic pole-changing by means of pole-phase modulation. The implementation and operation of pole-phase modulation is introduced using a 36-slot stator lamination example. The effect of stator lamination, winding, and inverter design decisions on available operating modes are presented. High-level performance advantages are investigated using a 6-pole machine wound with 2-pole coils. Estimates of this 2-pole/6-pole electronic pole-changing case study include the development of a nearly 9:1 constant power speed ratio; ~3x better than conventional fixed pole and phase count designs. Analytical models are developed to predict the steady state and dynamic performance of high inverter count machines and electronic pole changing. The generalized models are capable of describing induction machines with an arbitrary number of electrical inputs and available pole count operations. Both models are validated using two-dimensional finite element analysis, and allow the effects of numerous electrical and mechanical design decisions on overall system performance to be easily examined. The additional degrees of freedom in multiphase reference frame transformations are utilized to formulate decoupled electromechanical energy conversion subspaces, and enable conventional control technique to be applied to high phase count induction machines with electronic pole changing. Scalar and vector control techniques are used to study controlled transition between two different pole counts, and illustrate the improved performance offered by the more advanced field-oriented control methods. A 36-coil toroidally-wound induction machine testbed is designed, built, and tested. Experimental tests are carried out to examine 2-pole/6-pole electronic pole changing operation with nine electrical inputs. Preliminary results exhibit performance relationships corresponding to previous steady state analytical model estimates, and verify pole-phase modulation operation. Discrepancies in equivalent circuit parameters are attributed to analytical model assumptions and nonidealities of the constructed machine.","abstract_html":"The design of powerful and compact electric machines in highly dynamic applications such as electric traction and integrated starter/generators is an extremely difficult engineering challenge. Use of conventional machine designs with components designed for fixed voltage and frequency operation, unfortunately, do not make things any easier. By embracing recent advancements in the cost, performance, and reliability of power electronics and utilizing machine designs that are able to fully utilize the flexibility available from power electronics-based sources, interesting and potentially superior machine design solutions become available. This dissertation examines the feasibility and advantages of one such solution: electronic pole-changing by means of pole-phase modulation. The implementation and operation of pole-phase modulation is introduced using a 36-slot stator lamination example. The effect of stator lamination, winding, and inverter design decisions on available operating modes are presented. High-level performance advantages are investigated using a 6-pole machine wound with 2-pole coils. Estimates of this 2-pole/6-pole electronic pole-changing case study include the development of a nearly 9:1 constant power speed ratio; ~3x better than conventional fixed pole and phase count designs. Analytical models are developed to predict the steady state and dynamic performance of high inverter count machines and electronic pole changing. The generalized models are capable of describing induction machines with an arbitrary number of electrical inputs and available pole count operations. Both models are validated using two-dimensional finite element analysis, and allow the effects of numerous electrical and mechanical design decisions on overall system performance to be easily examined. The additional degrees of freedom in multiphase reference frame transformations are utilized to formulate decoupled electromechanical energy conversion subspaces, and enable conventional control technique to be applied to high phase count induction machines with electronic pole changing. Scalar and vector control techniques are used to study controlled transition between two different pole counts, and illustrate the improved performance offered by the more advanced field-oriented control methods. A 36-coil toroidally-wound induction machine testbed is designed, built, and tested. Experimental tests are carried out to examine 2-pole/6-pole electronic pole changing operation with nine electrical inputs. Preliminary results exhibit performance relationships corresponding to previous steady state analytical model estimates, and verify pole-phase modulation operation. Discrepancies in equivalent circuit parameters are attributed to analytical model assumptions and nonidealities of the constructed machine.","abstract_has_math":false,"creators":["Magill, Matthew"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Electrical & Computer Engr","degree_department":null,"school":null,"contributors":["Krein, Philip","Haran, Kiruba","Sauer, Peter W.","Jin, Jianming"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-07-22T22:16:45Z","date_published":"2015-07-22T22:16:45Z","updated_at":"2026-07-22T22:26:11Z","subjects":["electric machine","induction machine","electronic pole changing","pole-phase modulation"],"languages":["en"],"rights":["Copyright 2015 Matthew Magill"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/78380","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Krein, Philip","Haran, Kiruba","Sauer, Peter W.","Jin, Jianming"]},{"key":"dc:creator","label":"Author","values":["Magill, Matthew"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-07-22T22:16:45Z","2015-05","2015-04-15","2015-5"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Electrical & Computer Engr"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["electric machine","induction machine","electronic pole changing","pole-phase modulation"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2015 Matthew Magill"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/78380"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The design of powerful and compact electric machines in highly dynamic applications such as electric traction and integrated starter/generators is an extremely difficult engineering challenge. Use of conventional machine designs with components designed for fixed voltage and frequency operation, unfortunately, do not make things any easier. By embracing recent advancements in the cost, performance, and reliability of power electronics and utilizing machine designs that are able to fully utilize the flexibility available from power electronics-based sources, interesting and potentially superior machine design solutions become available. This dissertation examines the feasibility and advantages of one such solution: electronic pole-changing by means of pole-phase modulation. The implementation and operation of pole-phase modulation is introduced using a 36-slot stator lamination example. The effect of stator lamination, winding, and inverter design decisions on available operating modes are presented. High-level performance advantages are investigated using a 6-pole machine wound with 2-pole coils. Estimates of this 2-pole/6-pole electronic pole-changing case study include the development of a nearly 9:1 constant power speed ratio; ~3x better than conventional fixed pole and phase count designs. Analytical models are developed to predict the steady state and dynamic performance of high inverter count machines and electronic pole changing. The generalized models are capable of describing induction machines with an arbitrary number of electrical inputs and available pole count operations. Both models are validated using two-dimensional finite element analysis, and allow the effects of numerous electrical and mechanical design decisions on overall system performance to be easily examined. The additional degrees of freedom in multiphase reference frame transformations are utilized to formulate decoupled electromechanical energy conversion subspaces, and enable conventional control technique to be applied to high phase count induction machines with electronic pole changing. Scalar and vector control techniques are used to study controlled transition between two different pole counts, and illustrate the improved performance offered by the more advanced field-oriented control methods. A 36-coil toroidally-wound induction machine testbed is designed, built, and tested. Experimental tests are carried out to examine 2-pole/6-pole electronic pole changing operation with nine electrical inputs. Preliminary results exhibit performance relationships corresponding to previous steady state analytical model estimates, and verify pole-phase modulation operation. Discrepancies in equivalent circuit parameters are attributed to analytical model assumptions and nonidealities of the constructed machine.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2015-07-22 without embargo terms","The student, Matthew Magill, accepted the attached license on 2015-04-13 at 23:37.","The student, Matthew Magill, submitted this Dissertation for approval on 2015-04-13 at 23:46.","This Dissertation was approved for publication on 2015-04-15 at 14:11.","DSpace SAF Submission Ingestion Package generated from Vireo submission #7846 on 2015-07-22 at 10:31:55","Made available in DSpace on 2015-07-22T22:16:45Z (GMT). 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By embracing recent advancements in the cost, performance, and reliability of power electronics and utilizing machine designs that are able to fully utilize the flexibility available from power electronics-based sources, interesting and potentially superior machine design solutions become available. This dissertation examines the feasibility and advantages of one such solution: electronic pole-changing by means of pole-phase modulation. The implementation and operation of pole-phase modulation is introduced using a 36-slot stator lamination example. The effect of stator lamination, winding, and inverter design decisions on available operating modes are presented. High-level performance advantages are investigated using a 6-pole machine wound with 2-pole coils. Estimates of this 2-pole/6-pole electronic pole-changing case study include the development of a nearly 9:1 constant power speed ratio; ~3x better than conventional fixed pole and phase count designs. Analytical models are developed to predict the steady state and dynamic performance of high inverter count machines and electronic pole changing. The generalized models are capable of describing induction machines with an arbitrary number of electrical inputs and available pole count operations. Both models are validated using two-dimensional finite element analysis, and allow the effects of numerous electrical and mechanical design decisions on overall system performance to be easily examined. The additional degrees of freedom in multiphase reference frame transformations are utilized to formulate decoupled electromechanical energy conversion subspaces, and enable conventional control technique to be applied to high phase count induction machines with electronic pole changing. Scalar and vector control techniques are used to study controlled transition between two different pole counts, and illustrate the improved performance offered by the more advanced field-oriented control methods. A 36-coil toroidally-wound induction machine testbed is designed, built, and tested. Experimental tests are carried out to examine 2-pole/6-pole electronic pole changing operation with nine electrical inputs. Preliminary results exhibit performance relationships corresponding to previous steady state analytical model estimates, and verify pole-phase modulation operation. Discrepancies in equivalent circuit parameters are attributed to analytical model assumptions and nonidealities of the constructed machine.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2015-07-22 without embargo terms","The student, Matthew Magill, accepted the attached license on 2015-04-13 at 23:37.","The student, Matthew Magill, submitted this Dissertation for approval on 2015-04-13 at 23:46.","This Dissertation was approved for publication on 2015-04-15 at 14:11.","DSpace SAF Submission Ingestion Package generated from Vireo submission #7846 on 2015-07-22 at 10:31:55","Made available in DSpace on 2015-07-22T22:16:45Z (GMT). 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