{"id":{"repo_id":"mit","oai_identifier":"oai:dspace.mit.edu:1721.1/151939"},"canonical_url":"https://search.dev.ndltd.org/etd/mit/oai:dspace.mit.edu:1721.1/151939","repository":{"repo_id":"mit","name":"MIT","base_url":"https://dspace.mit.edu/oai/request"},"display":{"title":"Single Degree of Freedom Solid Rotor Velocity Control Induction Drive","abstract":"This thesis studies a single degree of freedom (DOF), two-pole, three-phase, solid rotor, induction motor operating in closed loop angular velocity control via a proportional-integral (PI) controller applying a constant amplitude, variable frequency drive. The stator consists of six iron teeth, evenly spaced and pointing radially inward, wound with 160 turns of copper wire each in a three-phase, two-pole configuration. A steel enclosure houses the stator and is supported by a 3D-printed polylactic acid (PLA) enclosure. The wiring is initially connected in wye configuration without a neutral wire but later converted to three independent phases, each with its own input and output wire. The teeth have a nominal air gap of 0.5mm with the rotor. The rotor consists of a solid iron cylindrical core with a 1mm aluminum sleeve press fitted on the outside. Two mechanical bearings center the rotor inside the stator. A single- input single-output (SISO) PI controller commands three 750 mA amplitude currents with variable frequency, and offset by 120 degrees to provide a 3-phase drive resulting in a rotating magnetic field. Each coil is powered by a custom linear transconductance amplifier with 5 kHz bandwidth and 0.3 A/V DC gain. The controller receives feedback through a contact-less magnetic encoder providing a linear voltage measurement of the rotor’s angle. We differentiate the position measurement to estimate the angular velocity of the shaft. A small diametrically magnetized cylindrical permanent magnet (PM) is attached to the end of the shaft and constrained by a 3-D printed PLA fixture. During operation, we produced up to 1.6 mNm of torque and velocities of up to 8,000 RPM.","abstract_html":"This thesis studies a single degree of freedom (DOF), two-pole, three-phase, solid rotor, induction motor operating in closed loop angular velocity control via a proportional-integral (PI) controller applying a constant amplitude, variable frequency drive. The stator consists of six iron teeth, evenly spaced and pointing radially inward, wound with 160 turns of copper wire each in a three-phase, two-pole configuration. A steel enclosure houses the stator and is supported by a 3D-printed polylactic acid (PLA) enclosure. The wiring is initially connected in wye configuration without a neutral wire but later converted to three independent phases, each with its own input and output wire. The teeth have a nominal air gap of 0.5mm with the rotor. The rotor consists of a solid iron cylindrical core with a 1mm aluminum sleeve press fitted on the outside. Two mechanical bearings center the rotor inside the stator. A single- input single-output (SISO) PI controller commands three 750 mA amplitude currents with variable frequency, and offset by 120 degrees to provide a 3-phase drive resulting in a rotating magnetic field. Each coil is powered by a custom linear transconductance amplifier with 5 kHz bandwidth and 0.3 A/V DC gain. The controller receives feedback through a contact-less magnetic encoder providing a linear voltage measurement of the rotor’s angle. We differentiate the position measurement to estimate the angular velocity of the shaft. A small diametrically magnetized cylindrical permanent magnet (PM) is attached to the end of the shaft and constrained by a 3-D printed PLA fixture. During operation, we produced up to 1.6 mNm of torque and velocities of up to 8,000 RPM.","abstract_has_math":false,"creators":["Roman, Jean C."],"institution":"Massachusetts Institute of Technology","degree_name":"Master","degree_level":null,"degree_discipline":null,"degree_department":"Massachusetts Institute of Technology. Department of Mechanical Engineering","school":null,"contributors":[],"advisors":["Trumper, David L."],"committee_chairs":[],"committee_members":[],"year":2023,"date_issued":"2023-06","date_published":"2023-06","updated_at":"2026-07-22T22:22:13Z","subjects":[],"languages":[],"rights":["In Copyright - Educational Use Permitted","Copyright retained by author(s)"],"rights_urls":["https://rightsstatements.org/page/InC-EDU/1.0/"],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/1721.1/151939","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Trumper, David L."]},{"key":"dc:contributor.department","label":"Department","values":["Massachusetts Institute of Technology. Department of Mechanical Engineering"]},{"key":"dc:creator","label":"Author","values":["Roman, Jean C."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2023-08-23T16:20:41Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2023-08-23T16:20:41Z"]},{"key":"dc:date.issued","label":"Date","values":["2023-06"]},{"key":"dc:publisher","label":"Institution","values":["Massachusetts Institute of Technology"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master","Master of Science in Mechanical Engineering"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:rights","label":"Dc Rights","values":["In Copyright - Educational Use Permitted","Copyright retained by author(s)"]},{"key":"dc:rights.uri","label":"Rights URI","values":["https://rightsstatements.org/page/InC-EDU/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/1721.1/151939"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["This thesis studies a single degree of freedom (DOF), two-pole, three-phase, solid rotor, induction motor operating in closed loop angular velocity control via a proportional-integral (PI) controller applying a constant amplitude, variable frequency drive. The stator consists of six iron teeth, evenly spaced and pointing radially inward, wound with 160 turns of copper wire each in a three-phase, two-pole configuration. A steel enclosure houses the stator and is supported by a 3D-printed polylactic acid (PLA) enclosure. The wiring is initially connected in wye configuration without a neutral wire but later converted to three independent phases, each with its own input and output wire. The teeth have a nominal air gap of 0.5mm with the rotor. The rotor consists of a solid iron cylindrical core with a 1mm aluminum sleeve press fitted on the outside. Two mechanical bearings center the rotor inside the stator. A single- input single-output (SISO) PI controller commands three 750 mA amplitude currents with variable frequency, and offset by 120 degrees to provide a 3-phase drive resulting in a rotating magnetic field. Each coil is powered by a custom linear transconductance amplifier with 5 kHz bandwidth and 0.3 A/V DC gain. The controller receives feedback through a contact-less magnetic encoder providing a linear voltage measurement of the rotor’s angle. We differentiate the position measurement to estimate the angular velocity of the shaft. A small diametrically magnetized cylindrical permanent magnet (PM) is attached to the end of the shaft and constrained by a 3-D printed PLA fixture. During operation, we produced up to 1.6 mNm of torque and velocities of up to 8,000 RPM."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["S.M."]},{"key":"dc:title","label":"Title","values":["Single Degree of Freedom Solid Rotor Velocity Control Induction Drive"]}]}],"canonical_facts":{"dc:contributor.advisor":["Trumper, David L."],"dc:contributor.department":["Massachusetts Institute of Technology. Department of Mechanical Engineering"],"dc:creator":["Roman, Jean C."],"dc:date.accessioned":["2023-08-23T16:20:41Z"],"dc:date.available":["2023-08-23T16:20:41Z"],"dc:date.issued":["2023-06"],"dc:description.abstract":["This thesis studies a single degree of freedom (DOF), two-pole, three-phase, solid rotor, induction motor operating in closed loop angular velocity control via a proportional-integral (PI) controller applying a constant amplitude, variable frequency drive. The stator consists of six iron teeth, evenly spaced and pointing radially inward, wound with 160 turns of copper wire each in a three-phase, two-pole configuration. A steel enclosure houses the stator and is supported by a 3D-printed polylactic acid (PLA) enclosure. The wiring is initially connected in wye configuration without a neutral wire but later converted to three independent phases, each with its own input and output wire. The teeth have a nominal air gap of 0.5mm with the rotor. The rotor consists of a solid iron cylindrical core with a 1mm aluminum sleeve press fitted on the outside. Two mechanical bearings center the rotor inside the stator. A single- input single-output (SISO) PI controller commands three 750 mA amplitude currents with variable frequency, and offset by 120 degrees to provide a 3-phase drive resulting in a rotating magnetic field. Each coil is powered by a custom linear transconductance amplifier with 5 kHz bandwidth and 0.3 A/V DC gain. The controller receives feedback through a contact-less magnetic encoder providing a linear voltage measurement of the rotor’s angle. We differentiate the position measurement to estimate the angular velocity of the shaft. A small diametrically magnetized cylindrical permanent magnet (PM) is attached to the end of the shaft and constrained by a 3-D printed PLA fixture. During operation, we produced up to 1.6 mNm of torque and velocities of up to 8,000 RPM."],"dc:description.degree":["S.M."],"dc:identifier.uri":["https://hdl.handle.net/1721.1/151939"],"dc:publisher":["Massachusetts Institute of Technology"],"dc:rights":["In Copyright - Educational Use Permitted","Copyright retained by author(s)"],"dc:rights.uri":["https://rightsstatements.org/page/InC-EDU/1.0/"],"dc:title":["Single Degree of Freedom Solid Rotor Velocity Control Induction Drive"],"dc:type":["Thesis"],"thesis:degree_name":["Master","Master of Science in Mechanical Engineering"]},"updated_at":"2026-07-22T22:22:13Z"}