محمود خامسي پور

In this study, a sensorless control architecture for a Permanent Magnet Synchronous Motor (PMSM) driven by a Modular Multilevel Converter (MMC) is proposed an‎d investigated. The primary objective of the research is to eliminate mechanical position an‎d speed sensors from the drive system in order to reduce cost an‎d enhance system reliability, while maintaining high control accuracy. First, the fundamentals of sensorless PMSM control are reviewed, an‎d rotor position estimation methods—including model‑based techniques an‎d signal‑injection approaches across different speed ranges—are analyzed. Subsequently, the structure an‎d operating principles of multilevel converters are examined with a particular focus on the modular MMC topology, an‎d its advantages such as quasi‑sinusoidal voltage generation, reduced switching losses, an‎d scalability to high‑voltage applications are discussed. Next, detailed mathematical models of the PMSM an‎d the MMC are implemented in MATLAB/Simulink, an‎d a hybrid observer‑based control algorithm is developed for rotor position estimation an‎d current control. In addition, capacitor voltage balancing algorithms, circulating current control strategies, an‎d suitable modulation schemes are designed to ensure stable system operation. Simulation results an‎d experimental tests demonstrate that the proposed architecture achieves reduced position estimation error, lower current ripple, an‎d desirable dynamic stability across the entire speed range.

كنترل بدون حسگر , موتور سنكرون مغناطيس دائم , مبدل مدولار چندسطحي

Sensorless control , PMSM motor control , MMC

Mahmood Khamesipour

Davood Arab khaburi