{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/46665"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/46665","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Analysis of soft charging switched capacitor power converters","abstract":"Switch capacitor converters are a microcosm in the world of power converters and as such have received little attention in both research and application. There is a perception that they possess many undesirable operating characteristics, such as inefficiency, poor output regulation and tracking, and large impulse currents. These perceptions relegate switch capacitor converters to very niche solutions or even preclude them from consideration. The focus of this thesis is to outline soft-charging control, which addresses the stigmas associated with switch capacitor converters. A topology analysis is performed to determine which topologies can support soft-charging, and the Dickson charge pump is selected for the continued development of soft-charging control. The specifics of adapting soft-charging to the Dickson topology are accomplished through a loop-by-loop analysis to modify the phase structure and charge vector analysis to calculate the switching threshold control parameters. The result is a capacitive-magnetic, 2-stage hybrid converter that achieves greater capacitor utilization and effective output regulation. The interplay between the two stages allows each stage's operation to be augmented, while mitigating the drawbacks. This solution is well suited for large step-down applications that need high efficiency and power demonstrated with 8:1 and a 9:1 Dickson converter using soft-charging control.","abstract_html":"Switch capacitor converters are a microcosm in the world of power converters and as such have received little attention in both research and application. There is a perception that they possess many undesirable operating characteristics, such as inefficiency, poor output regulation and tracking, and large impulse currents. These perceptions relegate switch capacitor converters to very niche solutions or even preclude them from consideration. The focus of this thesis is to outline soft-charging control, which addresses the stigmas associated with switch capacitor converters. A topology analysis is performed to determine which topologies can support soft-charging, and the Dickson charge pump is selected for the continued development of soft-charging control. The specifics of adapting soft-charging to the Dickson topology are accomplished through a loop-by-loop analysis to modify the phase structure and charge vector analysis to calculate the switching threshold control parameters. The result is a capacitive-magnetic, 2-stage hybrid converter that achieves greater capacitor utilization and effective output regulation. The interplay between the two stages allows each stage's operation to be augmented, while mitigating the drawbacks. This solution is well suited for large step-down applications that need high efficiency and power demonstrated with 8:1 and a 9:1 Dickson converter using soft-charging control.","abstract_has_math":false,"creators":["May, Ryan"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Electrical & Computer Engineering","degree_department":null,"school":null,"contributors":["Pilawa-Podgurski, Robert C."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014-01-16T17:58:12Z","date_published":"2014-01-16T17:58:12Z","updated_at":"2026-07-22T22:25:36Z","subjects":["Hybrid Converter","2 Stage Converter","Soft Charging","Dickson","Switch Capacitor"],"languages":["en"],"rights":["Copyright 2013 Ryan May"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/46665","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Pilawa-Podgurski, Robert C."]},{"key":"dc:creator","label":"Author","values":["May, Ryan"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-01-16T17:58:12Z","2013-12"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Electrical & Computer Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"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":["Hybrid Converter","2 Stage Converter","Soft Charging","Dickson","Switch Capacitor"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2013 Ryan May"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/46665"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Switch capacitor converters are a microcosm in the world of power converters and as such have received little attention in both research and application. There is a perception that they possess many undesirable operating characteristics, such as inefficiency, poor output regulation and tracking, and large impulse currents. These perceptions relegate switch capacitor converters to very niche solutions or even preclude them from consideration. The focus of this thesis is to outline soft-charging control, which addresses the stigmas associated with switch capacitor converters. A topology analysis is performed to determine which topologies can support soft-charging, and the Dickson charge pump is selected for the continued development of soft-charging control. The specifics of adapting soft-charging to the Dickson topology are accomplished through a loop-by-loop analysis to modify the phase structure and charge vector analysis to calculate the switching threshold control parameters. The result is a capacitive-magnetic, 2-stage hybrid converter that achieves greater capacitor utilization and effective output regulation. The interplay between the two stages allows each stage's operation to be augmented, while mitigating the drawbacks. This solution is well suited for large step-down applications that need high efficiency and power demonstrated with 8:1 and a 9:1 Dickson converter using soft-charging control.","Item withdrawn by Laura Spradlin (lspradl2@illinois.edu) on 2013-12-10T17:34:20Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 May_Ryan.pdf: 15396066 bytes, checksum: 63f8ea78573780dfa2167645c2e8075b (MD5)","Made available in DSpace on 2014-01-16T17:58:12Z (GMT). No. of bitstreams: 2 Ryan_May.pdf: 15396066 bytes, checksum: 63f8ea78573780dfa2167645c2e8075b (MD5) license.txt: 4058 bytes, checksum: 26c26be23384fe45876bfa5f701c6bd8 (MD5)"]},{"key":"dc:title","label":"Title","values":["Analysis of soft charging switched capacitor power converters"]}]}],"canonical_facts":{"dc:contributor":["Pilawa-Podgurski, Robert C."],"dc:creator":["May, Ryan"],"dc:date":["2014-01-16T17:58:12Z","2013-12"],"dc:description":["Switch capacitor converters are a microcosm in the world of power converters and as such have received little attention in both research and application. There is a perception that they possess many undesirable operating characteristics, such as inefficiency, poor output regulation and tracking, and large impulse currents. These perceptions relegate switch capacitor converters to very niche solutions or even preclude them from consideration. The focus of this thesis is to outline soft-charging control, which addresses the stigmas associated with switch capacitor converters. A topology analysis is performed to determine which topologies can support soft-charging, and the Dickson charge pump is selected for the continued development of soft-charging control. The specifics of adapting soft-charging to the Dickson topology are accomplished through a loop-by-loop analysis to modify the phase structure and charge vector analysis to calculate the switching threshold control parameters. The result is a capacitive-magnetic, 2-stage hybrid converter that achieves greater capacitor utilization and effective output regulation. The interplay between the two stages allows each stage's operation to be augmented, while mitigating the drawbacks. This solution is well suited for large step-down applications that need high efficiency and power demonstrated with 8:1 and a 9:1 Dickson converter using soft-charging control.","Item withdrawn by Laura Spradlin (lspradl2@illinois.edu) on 2013-12-10T17:34:20Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 May_Ryan.pdf: 15396066 bytes, checksum: 63f8ea78573780dfa2167645c2e8075b (MD5)","Made available in DSpace on 2014-01-16T17:58:12Z (GMT). No. of bitstreams: 2 Ryan_May.pdf: 15396066 bytes, checksum: 63f8ea78573780dfa2167645c2e8075b (MD5) license.txt: 4058 bytes, checksum: 26c26be23384fe45876bfa5f701c6bd8 (MD5)"],"dc:identifier":["http://hdl.handle.net/2142/46665"],"dc:language":["en"],"dc:rights":["Copyright 2013 Ryan May"],"dc:subject":["Hybrid Converter","2 Stage Converter","Soft Charging","Dickson","Switch Capacitor"],"dc:title":["Analysis of soft charging switched capacitor power converters"],"dc:type":["text"],"thesis:degree_discipline":["Electrical & Computer Engineering"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:36Z"}