Prof. Eng. Gheorghe BALUTA PhD, Eng. Gheorghe URSANU PhD, Prof. Eng. Radu Iustin Bojoi (Italia), Eng. Cristina-Nicoleta DIACONESCU PhD student
Rezumat
Lucrarea prezinta o metoda de estimare a pozitiei rotorului pentru motorul de current continuu fara perii (BLDC)
utilizand traductoare cu rezolutie redusa cu senzori cu efect Hall. In controlul direct al cuplului (DTC), ca si in controlul cu
orientare dupa camp, rezolutia ridicata a pozitiei este esentiala pentru cresterea performantei actionarii. Informatia cu
rezolutie redusa furnizata de senzorii de pozitie cu efect Hall este trasformata intr-un vector de rotatie cuantificat spatial, iar
un observer cu vector de urmarire (VTO) este utilizat pentru cresterea rezolutiei informatiei de pozitie. Cea mai importanta
caracteristica a algoritmului de control o reprezinta proiectarea controlerului. Incercarile experimentale sunt utilizate pentru
a ilustra performanta si limitele observerului PLL intr-o schema DTC utilizata in actionarile electrice cu BLDC
Cuvinte cheie: pozitierezolverconvertor rezolver-digital
Abstract
This paper presents a rotor position estimation method for Brushless Direct Current (BLDC) motor drives using
low-resolution transducer with Hall-effect sensors. In Direct Torque Control (DTC), as well as in Field Oriented Control, the
high rotor position resolution is essential for increasing the drive performance. The low-resolution information provided by
the Hall-effect position sensors is transformed into a spatially quantized rotating vector and a Vector-Tracking Observer
(VTO) is used to increase the rotor position resolution. The control algorithm’s most innovative feature is its controller
design. Experimental testing is used to illustrate the performance and the limits of the PLL observer topology in a DTC
scheme used in BLDC electrical drive
Keywords: brushless motorsclosed loop systemsobserversstate estimationtorque control
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