{"id":{"repo_id":"cape-town","oai_identifier":"oai:open.uct.ac.za:11427/38991"},"canonical_url":"https://search.dev.ndltd.org/etd/cape-town/oai:open.uct.ac.za:11427/38991","repository":{"repo_id":"cape-town","name":"University of Cape Town","base_url":"https://open.uct.ac.za/oai/request"},"display":{"title":"Efficiency optimisation in a DC-DC chopper motor drive","abstract":"A complete DC-DC motor drive (battery, chopper, and motor) - is investigated with a view to optimising efficiency. The losses at each stage are analysed in detail and proposals are made to minimise them. The overall system is also modelled for the purpose of computer simulation. The computer model is used to investigate the possible efficiency saving if both field and armature current are controlled. An optimum control system is developed and compared with other control systems.","abstract_html":"A complete DC-DC motor drive (battery, chopper, and motor) - is investigated with a view to optimising efficiency. The losses at each stage are analysed in detail and proposals are made to minimise them. The overall system is also modelled for the purpose of computer simulation. The computer model is used to investigate the possible efficiency saving if both field and armature current are controlled. An optimum control system is developed and compared with other control systems.","abstract_has_math":false,"creators":["Prest, Rory Bruce"],"institution":"Department of Electrical Engineering","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Case, Jenni"],"committee_chairs":[],"committee_members":[],"year":1983,"date_issued":"1983","date_published":"1983","updated_at":"2026-07-22T22:23:16Z","subjects":["Batter, chopper, motor"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/11427/38991","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Case, Jenni"]},{"key":"dc:creator","label":"Author","values":["Prest, Rory Bruce"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2023-10-02T09:37:48Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2023-10-02T09:37:48Z"]},{"key":"dc:date.issued","label":"Date","values":["1983"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["Department of Electrical Engineering"]},{"key":"dc:type","label":"Dc Type","values":["Master Thesis"]},{"key":"dc:type.qualificationlevel","label":"Dc Type Qualificationlevel","values":["Masters","MSc"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Batter, chopper, motor"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/11427/38991"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["A complete DC-DC motor drive (battery, chopper, and motor) - is investigated with a view to optimising efficiency. The losses at each stage are analysed in detail and proposals are made to minimise them. The overall system is also modelled for the purpose of computer simulation. The computer model is used to investigate the possible efficiency saving if both field and armature current are controlled. An optimum control system is developed and compared with other control systems."]},{"key":"dc:title","label":"Title","values":["Efficiency optimisation in a DC-DC chopper motor drive"]}]}],"canonical_facts":{"dc:contributor.advisor":["Case, Jenni"],"dc:creator":["Prest, Rory Bruce"],"dc:date.accessioned":["2023-10-02T09:37:48Z"],"dc:date.available":["2023-10-02T09:37:48Z"],"dc:date.issued":["1983"],"dc:description.abstract":["A complete DC-DC motor drive (battery, chopper, and motor) - is investigated with a view to optimising efficiency. The losses at each stage are analysed in detail and proposals are made to minimise them. The overall system is also modelled for the purpose of computer simulation. The computer model is used to investigate the possible efficiency saving if both field and armature current are controlled. An optimum control system is developed and compared with other control systems."],"dc:identifier.uri":["http://hdl.handle.net/11427/38991"],"dc:publisher.department":["Department of Electrical Engineering"],"dc:subject":["Batter, chopper, motor"],"dc:title":["Efficiency optimisation in a DC-DC chopper motor drive"],"dc:type":["Master Thesis"],"dc:type.qualificationlevel":["Masters","MSc"]},"updated_at":"2026-07-22T22:23:16Z"}