{"id":{"repo_id":"greece","oai_identifier":"oai:10442/0543"},"canonical_url":"https://search.dev.ndltd.org/etd/greece/oai:10442/0543","repository":{"repo_id":"greece","name":"Greek National Archive of PhD Theses","base_url":"https://phdtheses.ekt.gr/eadd_oai/request"},"display":{"title":"ΜΕΛΕΤΗ ΣΧΗΜΑΤΩΝ ΔΙΑΜΟΡΦΩΣΗΣ ΘΕΣΗΣ ΠΑΛΜΩΝ (ΡΡΜ) ΓΙΑ ΤΟΝ ΕΛΕΓΧΟ ΑΣΥΓΧΡΟΝΩΝ ΤΡΙΦΑΣΙΚΩΝ ΚΙΝΗΤΗΡΩΝ","abstract":"IN THIS WORK A FAMILY OF NOVEL PPM SCHEMES IS PRESENTED AND ANALYSED WITH APPLICATIONS TO VARIABLE FREQUENCY INVERTER DRIVES. THE MOST INTERESTING AMONG THEM ARE THE DF-PPM, THE CS-E-PPM AND THE TC-PPM SIGNALS. IT HAS BEEN DEMONSTRATED THAT THE SPECTRA OF THESE SIGNALS POSSES A NUMBER OF SIGNIFICANT FEATURES SUCH AS: A) THE FUNDAMENTAL COMPONENT IS SIGNIFICANTLY STRONG AND IS LINEARLY CONTROLLED BY THE MODULATION INDEX AND PULSE WIDTH, B) THE HIGHER HARMONIC SPECTRUM ISMAINLY DEFINED BY THE MODULATION INDEX AND IS SUPPRESSED COMPARED WITH THE FUNDAMENTAL HARMONIC, C) MINIMUM TIME INTERVAL BETWEEN SUCCESSIVE CHOPPINGS IS KEPT HIGHER THAN A MINIMUM BOUND, THUS AVOIDING LOCK-OUT EFFECTS, D) POSSIBILITY OF CHOOSING PARTICULAR PAIR OF PARAMETERS WHICH CORRESPOND TO WAVE FORMS WITH SUFFICIENTLY LOW UPPER SPECTRUM. THE HARMONIC POWER LOSSES AS WELL AS HARMONIC TORQUES IN INDUCTION MOTOR ARE PROVED TO BE LOW ENOUGH, DEPENDING ON THE PARTICULAR CHOISE OF PARAMETERS.","abstract_html":"IN THIS WORK A FAMILY OF NOVEL PPM SCHEMES IS PRESENTED AND ANALYSED WITH APPLICATIONS TO VARIABLE FREQUENCY INVERTER DRIVES. THE MOST INTERESTING AMONG THEM ARE THE DF-PPM, THE CS-E-PPM AND THE TC-PPM SIGNALS. IT HAS BEEN DEMONSTRATED THAT THE SPECTRA OF THESE SIGNALS POSSES A NUMBER OF SIGNIFICANT FEATURES SUCH AS: A) THE FUNDAMENTAL COMPONENT IS SIGNIFICANTLY STRONG AND IS LINEARLY CONTROLLED BY THE MODULATION INDEX AND PULSE WIDTH, B) THE HIGHER HARMONIC SPECTRUM ISMAINLY DEFINED BY THE MODULATION INDEX AND IS SUPPRESSED COMPARED WITH THE FUNDAMENTAL HARMONIC, C) MINIMUM TIME INTERVAL BETWEEN SUCCESSIVE CHOPPINGS IS KEPT HIGHER THAN A MINIMUM BOUND, THUS AVOIDING LOCK-OUT EFFECTS, D) POSSIBILITY OF CHOOSING PARTICULAR PAIR OF PARAMETERS WHICH CORRESPOND TO WAVE FORMS WITH SUFFICIENTLY LOW UPPER SPECTRUM. THE HARMONIC POWER LOSSES AS WELL AS HARMONIC TORQUES IN INDUCTION MOTOR ARE PROVED TO BE LOW ENOUGH, DEPENDING ON THE PARTICULAR CHOISE OF PARAMETERS.","abstract_has_math":false,"creators":["Theocharis, John","Θεοχάρης, Ιωάννης"],"institution":"Aristotle University Of Thessaloniki (AUTH)","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1985,"date_issued":"1985","date_published":"1985","updated_at":"2026-07-24T02:25:21Z","subjects":["ΑΝΑΛΥΣΗ ΦΑΣΜΑΤΩΝ ΡΡΜ","ΕΛΕΓΧΟΣ ΗΛΕΚΤΡΙΚΩΝ ΚΙΝΗΤΗΡΩΝ","ΣΥΜΠΕΡΙΦΟΡΑ ΚΙΝΗΤΗΡΩΝ ΜΕ ΔΙΕΓΕΡΣΗ ΡΡΜ","ΣΧΗΜΑΤΑ ΔΙΑΜΟΡΦΩΣΗΣ ΘΕΣΗΣ ΠΑΛΜΩΝ","ΦΑΣΜΑΤΑ ΑΝΩΤΕΡΩΝ ΑΡΜΟΝΙΚΩΝ","ΨΗΦΙΑΚΕΣ ΓΕΝΝΗΤΡΙΕΣ ΚΥΜΑΤΟΜΟΡΦΩΝ ΡΡΜ-PWM","CONTROL OF ELECTRICAL INDUCTION MOTORS","DIGITAL GENERATORS OF PPM-PWM SIGNALS","HIGHER HARMONICS SPECTRA","POWER LOSSES IN MOTORS DUE TO PPM SPECTRA","PPM SPECTRUM ANALYSIS","PULSE POSITION MODULATED WAVEFORMS","Επιστήμες Μηχανικού και Τεχνολογία","Επιστήμη Ηλεκτρολόγου Μηχανικού, Ηλεκτρονικού Μηχανικού, Μηχανικού Η/Υ","Engineering and Technology","Electrical Engineering, Electronic Engineering, Information Engineering"],"languages":["gre"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["10.12681/eadd/0543"],"render_values":[{"text":"10.12681/eadd/0543","href":"https://doi.org/10.12681/eadd/0543","code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/10442/hedi/0543","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Theocharis, John","Θεοχάρης, Ιωάννης"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["1985"]},{"key":"dc:publisher","label":"Institution","values":["Aristotle University Of Thessaloniki (AUTH)","Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ)"]},{"key":"dc:type","label":"Dc Type","values":["PhD Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["ΑΝΑΛΥΣΗ ΦΑΣΜΑΤΩΝ ΡΡΜ","ΕΛΕΓΧΟΣ ΗΛΕΚΤΡΙΚΩΝ ΚΙΝΗΤΗΡΩΝ","ΣΥΜΠΕΡΙΦΟΡΑ ΚΙΝΗΤΗΡΩΝ ΜΕ ΔΙΕΓΕΡΣΗ ΡΡΜ","ΣΧΗΜΑΤΑ ΔΙΑΜΟΡΦΩΣΗΣ ΘΕΣΗΣ ΠΑΛΜΩΝ","ΦΑΣΜΑΤΑ ΑΝΩΤΕΡΩΝ ΑΡΜΟΝΙΚΩΝ","ΨΗΦΙΑΚΕΣ ΓΕΝΝΗΤΡΙΕΣ ΚΥΜΑΤΟΜΟΡΦΩΝ ΡΡΜ-PWM","CONTROL OF ELECTRICAL INDUCTION MOTORS","DIGITAL GENERATORS OF PPM-PWM SIGNALS","HIGHER HARMONICS SPECTRA","POWER LOSSES IN MOTORS DUE TO PPM SPECTRA","PPM SPECTRUM ANALYSIS","PULSE POSITION MODULATED WAVEFORMS","Επιστήμες Μηχανικού και Τεχνολογία","Επιστήμη Ηλεκτρολόγου Μηχανικού, Ηλεκτρονικού Μηχανικού, Μηχανικού Η/Υ","Engineering and Technology","Electrical Engineering, Electronic Engineering, Information Engineering"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["gre"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["10.12681/eadd/0543","http://hdl.handle.net/10442/hedi/0543"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["IN THIS WORK A FAMILY OF NOVEL PPM SCHEMES IS PRESENTED AND ANALYSED WITH APPLICATIONS TO VARIABLE FREQUENCY INVERTER DRIVES. THE MOST INTERESTING AMONG THEM ARE THE DF-PPM, THE CS-E-PPM AND THE TC-PPM SIGNALS. IT HAS BEEN DEMONSTRATED THAT THE SPECTRA OF THESE SIGNALS POSSES A NUMBER OF SIGNIFICANT FEATURES SUCH AS: A) THE FUNDAMENTAL COMPONENT IS SIGNIFICANTLY STRONG AND IS LINEARLY CONTROLLED BY THE MODULATION INDEX AND PULSE WIDTH, B) THE HIGHER HARMONIC SPECTRUM ISMAINLY DEFINED BY THE MODULATION INDEX AND IS SUPPRESSED COMPARED WITH THE FUNDAMENTAL HARMONIC, C) MINIMUM TIME INTERVAL BETWEEN SUCCESSIVE CHOPPINGS IS KEPT HIGHER THAN A MINIMUM BOUND, THUS AVOIDING LOCK-OUT EFFECTS, D) POSSIBILITY OF CHOOSING PARTICULAR PAIR OF PARAMETERS WHICH CORRESPOND TO WAVE FORMS WITH SUFFICIENTLY LOW UPPER SPECTRUM. THE HARMONIC POWER LOSSES AS WELL AS HARMONIC TORQUES IN INDUCTION MOTOR ARE PROVED TO BE LOW ENOUGH, DEPENDING ON THE PARTICULAR CHOISE OF PARAMETERS.","ΣΤΗΝ ΔΙΑΤΡΙΒΗ ΑΝΑΠΤΥΧΘΗΚΕ ΓΙΑ ΠΡΩΤΗ ΦΟΡΑ ΜΙΑ ΟΜΑΔΑ ΣΧΗΑΜΑΤΩΝ ΡΡΜ, ΒΑΣΙΣΜΕΝΑ ΣΤΗΝ ΘΕΜΕΛΙΩΔΗ ΑΡΧΗ ΔΙΑΜΟΡΦΩΣΗΣ ΘΕΣΗΣ ΠΑΛΜΩΝ, ΤΑ ΟΠΟΙΑ ΕΙΝΑΙ ΚΑΤΑΛΛΗΛΑ ΓΙΑ ΕΛΕΓΧΟ ΤΩΝ ΑΣΥΓΧΡΟΝΩΝ ΜΗΧΑΝΩΝ. ΔΙΝΕΤΑΙ Η ΑΝΑΛΥΣΗ ΤΟΥ ΚΑΘΕ ΣΧΗΜΑΤΟΣ ΞΕΧΩΡΙΣΤΑ ΚΑΙ ΚΑΘΟΡΙΖΟΝΤΑΙ ΤΑ ΒΑΣΙΚΑ ΧΑΡΑΚΤΗΡΙΣΤΙΚΑ ΤΩΝ ΦΑΣΜΑΤΩΝ. ΜΕΡΙΚΑ ΑΠΟ ΤΑ ΣΤΟΙΧΕΙΑ ΠΟΥ ΧΑΡΑΚΤΗΡΙΖΟΥΝ ΤΑ ΦΑΣΜΑΤΑ ΕΙΝΑΙ: Α) ΥΠΑΡΞΗ ΙΣΧΥΡΗΣ ΘΕΜΕΛΙΩΔΟΥΣ ΑΡΜΟΝΙΚΗΣ, Β) ΦΑΣΜΑ ΑΝΩΤΕΡΩΝ ΑΡΜΟΝΙΚΩΝ ΧΑΜΗΛΟ ΣΕ ΣΧΕΣΗ ΜΕ ΤΗΝ ΒΑΣΙΚΗ ΣΥΝΙΣΤΩΣΑ, Γ) ΔΥΝΑΤΟΤΗΤΑ ΕΠΙΛΟΓΗΣ ΣΥΓΚΕΚΡΙΜΕΝΩΝ ΠΑΡΑΜΕΤΡΩΝ ΠΟΥ ΑΝΤΙΣΤΟΙΧΟΥΝ ΣΕ ΣΗΜΑΤΑ ΡΡΜ ΜΕ ΔΕΔΟΜΕΝΗ ΘΕΜΕΛΙΩΔΗΚΑΙ ΕΠΙΘΥΜΗΤΑ ΧΑΡΑΚΤΗΡΙΣΤΙΚΑ ΦΑΣΜΑΤΟΣ ΑΝΩΤΕΡΩΝ ΑΡΜΟΝΙΚΩΝ, Δ) ΕΛΕΓΧΟΣ ΤΗΣ ΘΕΜΕΛΙΩΔΟΥΣ ΣΥΝΙΣΤΩΣΑΣ ΑΠΟ ΔΥΟ ΠΑΡΑΜΕΤΡΟΥΣ (ΤΟΝ ΣΥΝΤΕΛΕΣΤΗ ΔΙΑΜΟΡΦΩΣΗΣ ΚΑΙ ΤΟ ΠΛΑΤΟΣΤΩΝ ΠΑΛΜΩΝ). ΟΙ ΑΠΩΛΕΙΕΣ ΙΣΧΥΟΣ ΣΤΟΝ ΚΙΝΗΤΗΡΑ, ΛΟΓΩ ΣΗΜΑΤΩΝ ΡΡΜ ΕΙΝΑΙ ΧΑΜΗΛΕΣ ΣΕ ΟΛΗ ΤΗΝ ΠΕΡΙΟΧΗ ΣΥΧΝΟΤΗΤΩΝ ΛΕΙΤΟΥΡΓΙΑΣ ΚΑΙ ΜΕΤΑΒΑΛΛΟΜΕΝΕΣ ΟΜΑΛΑ ΣΕ ΑΝΤΙΘΕΣΗ ΜΕ ΤΟ PWM. ΟΙ ΑΡΜΟΝΙΚΕΣ ΡΟΠΕΣ ΕΙΝΑΙ ΕΠΙΣΗΣ ΙΚΑΝΟΠΟΙΗΤΙΚΕΣ. ΜΕ ΚΑΤΑΛΛΗΛΗ ΔΕ ΕΠΙΛΟΓΗ ΠΑΡΑΜΕΤΡΩΝ ΤΩΝ ΣΗΜΑΤΩΝ ΡΡΜ ΕΙΝΑΙ ΔΥΝΑΤΟΝ ΝΑ ΒΕΛΤΙΩΘΟΥΝ ."]},{"key":"dc:title","label":"Title","values":["ΜΕΛΕΤΗ ΣΧΗΜΑΤΩΝ ΔΙΑΜΟΡΦΩΣΗΣ ΘΕΣΗΣ ΠΑΛΜΩΝ (ΡΡΜ) ΓΙΑ ΤΟΝ ΕΛΕΓΧΟ ΑΣΥΓΧΡΟΝΩΝ ΤΡΙΦΑΣΙΚΩΝ ΚΙΝΗΤΗΡΩΝ","ANALYSIS OF PULSE POSITION MODULATION (PPM) SCHEMES WITH APPLICATION TO THREE-PHASE INDUCTION MOTORS"]}]}],"canonical_facts":{"dc:creator":["Theocharis, John","Θεοχάρης, Ιωάννης"],"dc:date":["1985"],"dc:description":["IN THIS WORK A FAMILY OF NOVEL PPM SCHEMES IS PRESENTED AND ANALYSED WITH APPLICATIONS TO VARIABLE FREQUENCY INVERTER DRIVES. THE MOST INTERESTING AMONG THEM ARE THE DF-PPM, THE CS-E-PPM AND THE TC-PPM SIGNALS. IT HAS BEEN DEMONSTRATED THAT THE SPECTRA OF THESE SIGNALS POSSES A NUMBER OF SIGNIFICANT FEATURES SUCH AS: A) THE FUNDAMENTAL COMPONENT IS SIGNIFICANTLY STRONG AND IS LINEARLY CONTROLLED BY THE MODULATION INDEX AND PULSE WIDTH, B) THE HIGHER HARMONIC SPECTRUM ISMAINLY DEFINED BY THE MODULATION INDEX AND IS SUPPRESSED COMPARED WITH THE FUNDAMENTAL HARMONIC, C) MINIMUM TIME INTERVAL BETWEEN SUCCESSIVE CHOPPINGS IS KEPT HIGHER THAN A MINIMUM BOUND, THUS AVOIDING LOCK-OUT EFFECTS, D) POSSIBILITY OF CHOOSING PARTICULAR PAIR OF PARAMETERS WHICH CORRESPOND TO WAVE FORMS WITH SUFFICIENTLY LOW UPPER SPECTRUM. THE HARMONIC POWER LOSSES AS WELL AS HARMONIC TORQUES IN INDUCTION MOTOR ARE PROVED TO BE LOW ENOUGH, DEPENDING ON THE PARTICULAR CHOISE OF PARAMETERS.","ΣΤΗΝ ΔΙΑΤΡΙΒΗ ΑΝΑΠΤΥΧΘΗΚΕ ΓΙΑ ΠΡΩΤΗ ΦΟΡΑ ΜΙΑ ΟΜΑΔΑ ΣΧΗΑΜΑΤΩΝ ΡΡΜ, ΒΑΣΙΣΜΕΝΑ ΣΤΗΝ ΘΕΜΕΛΙΩΔΗ ΑΡΧΗ ΔΙΑΜΟΡΦΩΣΗΣ ΘΕΣΗΣ ΠΑΛΜΩΝ, ΤΑ ΟΠΟΙΑ ΕΙΝΑΙ ΚΑΤΑΛΛΗΛΑ ΓΙΑ ΕΛΕΓΧΟ ΤΩΝ ΑΣΥΓΧΡΟΝΩΝ ΜΗΧΑΝΩΝ. ΔΙΝΕΤΑΙ Η ΑΝΑΛΥΣΗ ΤΟΥ ΚΑΘΕ ΣΧΗΜΑΤΟΣ ΞΕΧΩΡΙΣΤΑ ΚΑΙ ΚΑΘΟΡΙΖΟΝΤΑΙ ΤΑ ΒΑΣΙΚΑ ΧΑΡΑΚΤΗΡΙΣΤΙΚΑ ΤΩΝ ΦΑΣΜΑΤΩΝ. ΜΕΡΙΚΑ ΑΠΟ ΤΑ ΣΤΟΙΧΕΙΑ ΠΟΥ ΧΑΡΑΚΤΗΡΙΖΟΥΝ ΤΑ ΦΑΣΜΑΤΑ ΕΙΝΑΙ: Α) ΥΠΑΡΞΗ ΙΣΧΥΡΗΣ ΘΕΜΕΛΙΩΔΟΥΣ ΑΡΜΟΝΙΚΗΣ, Β) ΦΑΣΜΑ ΑΝΩΤΕΡΩΝ ΑΡΜΟΝΙΚΩΝ ΧΑΜΗΛΟ ΣΕ ΣΧΕΣΗ ΜΕ ΤΗΝ ΒΑΣΙΚΗ ΣΥΝΙΣΤΩΣΑ, Γ) ΔΥΝΑΤΟΤΗΤΑ ΕΠΙΛΟΓΗΣ ΣΥΓΚΕΚΡΙΜΕΝΩΝ ΠΑΡΑΜΕΤΡΩΝ ΠΟΥ ΑΝΤΙΣΤΟΙΧΟΥΝ ΣΕ ΣΗΜΑΤΑ ΡΡΜ ΜΕ ΔΕΔΟΜΕΝΗ ΘΕΜΕΛΙΩΔΗΚΑΙ ΕΠΙΘΥΜΗΤΑ ΧΑΡΑΚΤΗΡΙΣΤΙΚΑ ΦΑΣΜΑΤΟΣ ΑΝΩΤΕΡΩΝ ΑΡΜΟΝΙΚΩΝ, Δ) ΕΛΕΓΧΟΣ ΤΗΣ ΘΕΜΕΛΙΩΔΟΥΣ ΣΥΝΙΣΤΩΣΑΣ ΑΠΟ ΔΥΟ ΠΑΡΑΜΕΤΡΟΥΣ (ΤΟΝ ΣΥΝΤΕΛΕΣΤΗ ΔΙΑΜΟΡΦΩΣΗΣ ΚΑΙ ΤΟ ΠΛΑΤΟΣΤΩΝ ΠΑΛΜΩΝ). ΟΙ ΑΠΩΛΕΙΕΣ ΙΣΧΥΟΣ ΣΤΟΝ ΚΙΝΗΤΗΡΑ, ΛΟΓΩ ΣΗΜΑΤΩΝ ΡΡΜ ΕΙΝΑΙ ΧΑΜΗΛΕΣ ΣΕ ΟΛΗ ΤΗΝ ΠΕΡΙΟΧΗ ΣΥΧΝΟΤΗΤΩΝ ΛΕΙΤΟΥΡΓΙΑΣ ΚΑΙ ΜΕΤΑΒΑΛΛΟΜΕΝΕΣ ΟΜΑΛΑ ΣΕ ΑΝΤΙΘΕΣΗ ΜΕ ΤΟ PWM. ΟΙ ΑΡΜΟΝΙΚΕΣ ΡΟΠΕΣ ΕΙΝΑΙ ΕΠΙΣΗΣ ΙΚΑΝΟΠΟΙΗΤΙΚΕΣ. ΜΕ ΚΑΤΑΛΛΗΛΗ ΔΕ ΕΠΙΛΟΓΗ ΠΑΡΑΜΕΤΡΩΝ ΤΩΝ ΣΗΜΑΤΩΝ ΡΡΜ ΕΙΝΑΙ ΔΥΝΑΤΟΝ ΝΑ ΒΕΛΤΙΩΘΟΥΝ ."],"dc:identifier":["10.12681/eadd/0543","http://hdl.handle.net/10442/hedi/0543"],"dc:language":["gre"],"dc:publisher":["Aristotle University Of Thessaloniki (AUTH)","Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ)"],"dc:subject":["ΑΝΑΛΥΣΗ ΦΑΣΜΑΤΩΝ ΡΡΜ","ΕΛΕΓΧΟΣ ΗΛΕΚΤΡΙΚΩΝ ΚΙΝΗΤΗΡΩΝ","ΣΥΜΠΕΡΙΦΟΡΑ ΚΙΝΗΤΗΡΩΝ ΜΕ ΔΙΕΓΕΡΣΗ ΡΡΜ","ΣΧΗΜΑΤΑ ΔΙΑΜΟΡΦΩΣΗΣ ΘΕΣΗΣ ΠΑΛΜΩΝ","ΦΑΣΜΑΤΑ ΑΝΩΤΕΡΩΝ ΑΡΜΟΝΙΚΩΝ","ΨΗΦΙΑΚΕΣ ΓΕΝΝΗΤΡΙΕΣ ΚΥΜΑΤΟΜΟΡΦΩΝ ΡΡΜ-PWM","CONTROL OF ELECTRICAL INDUCTION MOTORS","DIGITAL GENERATORS OF PPM-PWM SIGNALS","HIGHER HARMONICS SPECTRA","POWER LOSSES IN MOTORS DUE TO PPM SPECTRA","PPM SPECTRUM ANALYSIS","PULSE POSITION MODULATED WAVEFORMS","Επιστήμες Μηχανικού και Τεχνολογία","Επιστήμη Ηλεκτρολόγου Μηχανικού, Ηλεκτρονικού Μηχανικού, Μηχανικού Η/Υ","Engineering and Technology","Electrical Engineering, Electronic Engineering, Information Engineering"],"dc:title":["ΜΕΛΕΤΗ ΣΧΗΜΑΤΩΝ ΔΙΑΜΟΡΦΩΣΗΣ ΘΕΣΗΣ ΠΑΛΜΩΝ (ΡΡΜ) ΓΙΑ ΤΟΝ ΕΛΕΓΧΟ ΑΣΥΓΧΡΟΝΩΝ ΤΡΙΦΑΣΙΚΩΝ ΚΙΝΗΤΗΡΩΝ","ANALYSIS OF PULSE POSITION MODULATION (PPM) SCHEMES WITH APPLICATION TO THREE-PHASE INDUCTION MOTORS"],"dc:type":["PhD Thesis"]},"updated_at":"2026-07-24T02:25:21Z"}