BLDC MOTOR SENSORED CONTROL BY DIGITAL POSITION OBSERVER

Autor/autori: 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: pozitie, rezolver, convertor 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 motors, closed loop systems, observers, state estimation, torque control

 

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