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Title:Dogodkovno osnovano vodenje motorja s trajnimi magneti
Authors:ID Kapun, Aljaž (Author)
ID Jezernik, Karel (Mentor) More about this mentor... New window
Files:.pdf DR_Kapun_Aljaz_2009.pdf (3,50 MB)
MD5: 63A988F1E107585BA2C32A9009F3C244
PID: 20.500.12556/dkum/c9f46ee2-f006-49e8-a99e-61ac3c722621
 
Language:Slovenian
Work type:Dissertation
Organization:FERI - Faculty of Electrical Engineering and Computer Science
Abstract:V prvem delu disertacije je predstavljen postopek za ovrednotenje valovitosti navora motorja s površinsko nameščenimi trajnimi magneti zaradi sinhronskega in preskočno reluktančnega samodržnega navora. Valovitost sinhronskega navora je posledica višje harmonskih komponent v gibalnih induciranih napetostih. Za določitev teh harmonskih komponent iz meritev faznih gibalnih induciranih napetosti, hitrosti rotorja in kota zavrtitve rotorja je predlagana uporaba aproksimacijske metode najmanjših kvadratov. Z metodo najmanjših kvadratov so iz signala navora nemodelirane dinamike določene tudi komponente samodržnega navora. Signal navora nemodelirane dinamike je ocenjen z opazovalnikom motnje iz meritev faznih tokov, hitrosti rotorja in mehanskega kota zavrtitve rotorja tokovno vodenega motorja. V drugem delu disertacije je obravnavano tokovno vodenje, katerega zmožnosti so ključnega pomena v shemah vodenja s katerimi želimo minimizirati vpliv valovitosti navora. V tem sklopu je predlagano dogodkovno tokovno vodenje motorja, ki predstavlja alternativo konvencionalnemu histereznemu vodenju z dvonivojskimi histereznimi regulatorji na faznih tokovih. Za razliko od konvencionalnega histereznega vodenja dogodkovno vodenje z uporabo informacije o napetostnem sektorju omogoča kontrolirano preklapljanje med stikalnimi elementi napetostnega pretvornika. Podana je primerjava med omenjenima tehnikama tokovnega vodenja glede na različne kriterije. Predstavljena je tudi njuna uporaba v povezavi s preprosto shemo hitrostnega vodenja v kombinaciji s tokovnim predkrmiljenjem s katero je minimiziran vpliv valovitosti v navoru. Vsi predstavljeni koncepti so potrjeni z eksperimentalnimi rezultati.
Keywords:motor s površinsko nameščenimi trajnimi magneti, identifikacija parametrov, valovitost navora, preskočno reluktančni samodržni navor, histerezno tokovno vodenje, dogodkovno tokovno vodenje
Place of publishing:Maribor
Publisher:[A. Kapun]
Year of publishing:2009
PID:20.500.12556/DKUM-9873 New window
UDC:681.51:621.313.8(043.3)
COBISS.SI-ID:244405248 New window
NUK URN:URN:SI:UM:DK:4UE9WXCC
Publication date in DKUM:02.03.2009
Views:3984
Downloads:458
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FERI
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Secondary language

Language:English
Title:Event driven current control of a permanent magnet synchronous machine
Abstract:The first part of this thesis presents a method for evaluating the torque ripple of a surface mounted permanent magnet synchronous motor due to the mutual and cogging torque. The ripple in mutual torque is caused by non-sinusoidal stator flux linkage distribution which is in direct correlation with the motor back-EMF. A least squares approximation method is applied to estimate the back-EMF harmonic content from experimental data for back-EMF, rotor speed and rotor position. The least squares method is also used to evaluate the cogging torque from a torque disturbance signal which is estimated using a closed-loop observer from the calculated mutual torque and measured rotor speed. The second part of the thesis deals with current control which plays a key role in controller-based design techniques for minimizing the torque ripple. The proposed event driven current control present an alternative to the conventional hysteresis control which uses three independent controllers, one for each phase. As distinguished from the conventional hysteresis control the even driven control introduces additional information about voltage sector. The comparison between this two control techniques is given regarding to different performance criteria like current error, number of inverter switching's and deviation from the reference current-speed motor characteristics. The discussed current control is also applied in the torque ripple minimization scheme where a speed controller in combination with current feedforward loop is used as design techniques for minimizing the torque ripple. Described concepts are verified with experimental results.
Keywords:permanent magnet synchronous machine, parameter identification, torque ripple, cogging torque, hysteresis current control, event driven current control


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