{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/36538"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/36538","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"Harmonic Reduction IN a Single-Switch Three-Phase Boost Rectifier With Harmonic-Injected PWM","abstract":"A constant switching frequency with the sixth-order harmonic injection PWM concept is established, and a sixth-order harmonic injection technique is developed for the harmonic reduction of a single-switch three-phase boost rectifier. The approach employs a constant duty cycle with sixth-order harmonic injection to suppress the dominant (fifth-order) harmonic in the input currents. Hence, to meet the THD<10% requirement, the rectifier voltage gain can be designed down to 1.45; to meet the IEC 1000-3-2 (A) standard, the output power can be pushed up to 10 kW for the application with a 3X220 V input and a 800 V output. The results are verified on a 6-kW prototype. The injection principle is graphically explained in current waveforms and mathematically proved. Two injection methods are proposed to meet either the THD requirement or the IEC standard. The injection implementation and design guidelines are provided. The boost inductor design and EMI filter design are discussed. An average small- signal model based on the equivalent multi-module model is developed and experimentally verified. The variations of the small-signal model against load are demonstrated, and the compensator design is discussed. The results show that at no load, the dominant pole of the control-to-output transfer function approaches the origin and causes more phase delay, making the control design difficult. To avoid the no load case and to simplify the control design, a 50-W dummy load (1% of the full load) is added. Finally, a simple nonlinear gain control circuit is presented to mitigate the load effect and reduce the dummy load to 10 W.","abstract_html":"A constant switching frequency with the sixth-order harmonic injection PWM concept is established, and a sixth-order harmonic injection technique is developed for the harmonic reduction of a single-switch three-phase boost rectifier. The approach employs a constant duty cycle with sixth-order harmonic injection to suppress the dominant (fifth-order) harmonic in the input currents. Hence, to meet the THD&lt;10% requirement, the rectifier voltage gain can be designed down to 1.45; to meet the IEC 1000-3-2 (A) standard, the output power can be pushed up to 10 kW for the application with a 3X220 V input and a 800 V output. The results are verified on a 6-kW prototype. The injection principle is graphically explained in current waveforms and mathematically proved. Two injection methods are proposed to meet either the THD requirement or the IEC standard. The injection implementation and design guidelines are provided. The boost inductor design and EMI filter design are discussed. An average small- signal model based on the equivalent multi-module model is developed and experimentally verified. The variations of the small-signal model against load are demonstrated, and the compensator design is discussed. The results show that at no load, the dominant pole of the control-to-output transfer function approaches the origin and causes more phase delay, making the control design difficult. To avoid the no load case and to simplify the control design, a 50-W dummy load (1% of the full load) is added. Finally, a simple nonlinear gain control circuit is presented to mitigate the load effect and reduce the dummy load to 10 W.","abstract_has_math":false,"creators":["Huang, Qihong"],"institution":"Virginia Tech","degree_name":"Master of Science","degree_level":"masters","degree_discipline":"Electrical and Computer Engineering","degree_department":"Electrical and Computer Engineering","school":null,"contributors":[],"advisors":[],"committee_chairs":["Lee, Fred C."],"committee_members":["Jovanovic, Milan M.","Chen, Dan Y."],"year":1997,"date_issued":"1997-02-04","date_published":"1997-02-04","updated_at":"2026-07-22T22:19:24Z","subjects":["power factor correction","switching rectifier","PWM techniques"],"languages":[],"rights":["In Copyright"],"rights_urls":["http://rightsstatements.org/vocab/InC/1.0/"],"identifier_entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["etd-2113131549741341"],"render_values":[{"text":"etd-2113131549741341","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/10919/36538","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.committeechair","label":"Committee Chair","values":["Lee, Fred C."]},{"key":"dc:contributor.committeemember","label":"Committee Member","values":["Jovanovic, Milan M.","Chen, Dan Y."]},{"key":"dc:contributor.department","label":"Department","values":["Electrical and Computer Engineering"]},{"key":"dc:creator","label":"Author","values":["Huang, Qihong"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2014-03-14T20:51:01Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2014-03-14T20:51:01Z","1997-02-04"]},{"key":"dc:date.issued","label":"Date","values":["1997-02-04"]},{"key":"dc:publisher","label":"Institution","values":["Virginia Tech"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Electrical and Computer Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Virginia Polytechnic Institute and State University"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["power factor correction","switching rectifier","PWM techniques"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:rights","label":"Dc Rights","values":["In Copyright"]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://rightsstatements.org/vocab/InC/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["etd-2113131549741341"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/10919/36538"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["A constant switching frequency with the sixth-order harmonic injection PWM concept is established, and a sixth-order harmonic injection technique is developed for the harmonic reduction of a single-switch three-phase boost rectifier. The approach employs a constant duty cycle with sixth-order harmonic injection to suppress the dominant (fifth-order) harmonic in the input currents. Hence, to meet the THD<10% requirement, the rectifier voltage gain can be designed down to 1.45; to meet the IEC 1000-3-2 (A) standard, the output power can be pushed up to 10 kW for the application with a 3X220 V input and a 800 V output. The results are verified on a 6-kW prototype. The injection principle is graphically explained in current waveforms and mathematically proved. Two injection methods are proposed to meet either the THD requirement or the IEC standard. The injection implementation and design guidelines are provided. The boost inductor design and EMI filter design are discussed. An average small- signal model based on the equivalent multi-module model is developed and experimentally verified. The variations of the small-signal model against load are demonstrated, and the compensator design is discussed. The results show that at no load, the dominant pole of the control-to-output transfer function approaches the origin and causes more phase delay, making the control design difficult. To avoid the no load case and to simplify the control design, a 50-W dummy load (1% of the full load) is added. Finally, a simple nonlinear gain control circuit is presented to mitigate the load effect and reduce the dummy load to 10 W."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Master of Science"]},{"key":"dc:title","label":"Title","values":["Harmonic Reduction IN a Single-Switch Three-Phase Boost Rectifier With Harmonic-Injected PWM"]}]}],"canonical_facts":{"dc:contributor.committeechair":["Lee, Fred C."],"dc:contributor.committeemember":["Jovanovic, Milan M.","Chen, Dan Y."],"dc:contributor.department":["Electrical and Computer Engineering"],"dc:creator":["Huang, Qihong"],"dc:date.accessioned":["2014-03-14T20:51:01Z"],"dc:date.available":["2014-03-14T20:51:01Z","1997-02-04"],"dc:date.issued":["1997-02-04"],"dc:description.abstract":["A constant switching frequency with the sixth-order harmonic injection PWM concept is established, and a sixth-order harmonic injection technique is developed for the harmonic reduction of a single-switch three-phase boost rectifier. The approach employs a constant duty cycle with sixth-order harmonic injection to suppress the dominant (fifth-order) harmonic in the input currents. Hence, to meet the THD<10% requirement, the rectifier voltage gain can be designed down to 1.45; to meet the IEC 1000-3-2 (A) standard, the output power can be pushed up to 10 kW for the application with a 3X220 V input and a 800 V output. The results are verified on a 6-kW prototype. The injection principle is graphically explained in current waveforms and mathematically proved. Two injection methods are proposed to meet either the THD requirement or the IEC standard. The injection implementation and design guidelines are provided. The boost inductor design and EMI filter design are discussed. An average small- signal model based on the equivalent multi-module model is developed and experimentally verified. The variations of the small-signal model against load are demonstrated, and the compensator design is discussed. The results show that at no load, the dominant pole of the control-to-output transfer function approaches the origin and causes more phase delay, making the control design difficult. To avoid the no load case and to simplify the control design, a 50-W dummy load (1% of the full load) is added. Finally, a simple nonlinear gain control circuit is presented to mitigate the load effect and reduce the dummy load to 10 W."],"dc:description.degree":["Master of Science"],"dc:identifier.other":["etd-2113131549741341"],"dc:identifier.uri":["http://hdl.handle.net/10919/36538"],"dc:publisher":["Virginia Tech"],"dc:rights":["In Copyright"],"dc:rights.uri":["http://rightsstatements.org/vocab/InC/1.0/"],"dc:subject":["power factor correction","switching rectifier","PWM techniques"],"dc:title":["Harmonic Reduction IN a Single-Switch Three-Phase Boost Rectifier With Harmonic-Injected PWM"],"dc:type":["Thesis"],"thesis:degree_discipline":["Electrical and Computer Engineering"],"thesis:degree_level":["masters"],"thesis:degree_name":["Master of Science"],"thesis:institution_name":["Virginia Polytechnic Institute and State University"]},"updated_at":"2026-07-22T22:19:24Z"}