Abstract
This two-part study proposes a new sensorless control strategy for non-sinusoidal multiphase permanent magnet synchronous machines (PMSMs), especially integrated motor drives (IMDs). Based on the Sliding Mode Observer (SMO), the proposed sensorless control strategy uses the signals (currents and voltages) of all fictitious machines of the multiphase PMSMs. It can estimate the high-accuracy rotor positions that are required in vector control. This proposed strategy is compared to the conventional sensorless control strategy that applies only current and voltage signals of the main fictitious machine, including the fundamental component of back electromotive force (back EMF) of non-sinusoidal multiphase PMSMs. Therefore, in order to choose an appropriate sensorless control strategy for the non-sinusoidal multiphase PMSMs, these two sensorless control strategies will be highlighted in terms of precision with respect to rotor position and speed estimation. Simulations and the experimental results obtained with a non-sinusoidal seven-phase PMSM will be shown to verify and compare the two sensorless control strategies. In this part of the study (part I), only sensorless control in the medium and high-speed range is considered. Sensorless control at the zero and low-speed range will be treated in the second part of this study (part II).
Highlights
With the huge development of electrified automotive vehicles, low-cost electrical drives with high performances are sought
The usual drawback of numerous (2k + 1) AC cables to connect the machine to an external voltage source inverter is disappearing with the development of integrated motor drives (IMDs), in which the power inverter is integrated into the electrical machine [5,6,7]
IItt ccaann bbee nnoottiicceedd tthhaatt tthhiiss hhiigghh rraattiioo iiss nnoott ccllaassssiiccaall, bbuutt iitt ccoorrrreessppoonnddss ttoo rreecceennttllyy ssttuuddiieedd mmaacchhiinneess [[44,3388––4400]] wwhhiicchh aarree cchhaarraacctteerriizzeedd bbyy aa ddoouubbllee ppoollaarriittyy((ppaanndd33pp).).InInmmaachchininesesfofrortrtarcatciotino,nt,htihsidsoduobuleblpeoplaorliatryitgyivgeisveastwa otw-sop-esepdeegdeagrebaorxfbuonxctfiuonncatliiotyn,awlihtyic,hwishiicnhteirsesintitnegrewsthineng twheheflnuxth-we eflaukxe-nwinegakceonnitnroglscoarnetrnoolst saarteisnfyoitnsga,twisiftyhoinngly, woniteh poonllayroitny.e Tphoilsarciotyn.cTehpitsocfomncuelptit-pofomlaruilttyi-wpoitlhargiteyawrbiothx gfueanrcbtiooxnfaulintcyticoannaaliltsyocbaen faolusondbeinfo[4u1n,d42i]nin[4t1h,4e2I]SCinAtDhecIoSnCcAepDt fcoornlcoewp-tvfoolrtalogwe m-vuollttaipgheamseuilntidpuhcatsioeninmdaucchtiionnesm. achines. This is mentioned in order to highlight the sensorless control when the principal amount of torque is not produced only by the fundamental (1st harmonic) of current and back EMF, as it is by the non-sinusoidal seven-phase permanent magnet synchronous machines (PMSMs) studied above
Summary
With the huge development of electrified automotive vehicles, low-cost electrical drives with high performances are sought. Sensorless control strategies for non-sinusoidal multiphase PMSMs, based on only the fundamental component of back EMFs (associated with the main fictitious machine), have been found in [27,29,30] In this case, only currents and voltages of the main fictitious machine are used to estimate rotor position. Only currents and voltages of the main fictitious machine are used to estimate rotor position In this part of the study, an original sensorless strategy using several harmonics of back EMFs to estimate the accurate rotor positions of non-sinusoidal multiphase machines is proposed.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
