Development of sensorless PM servo-system for harsh environments

Aim of this work is the development of efficient and robust filters for speed and position controls to be operated in harsh environments and in particular for underwater applications. PM motors are the most commonly adopted solutions for this kind of applications where the reliability of the component has important consequences both for the safety of the vehicle and the sustainability of the application. Common applications are the inspections of valuable underwater sites or the maintenance of potentially dangerous industrial facilities such as submerged plants of Oil&Gas industry. In particular in this work authors have concentrated their attention on the part concerning robust and efficient speed and position estimators for sensorless drive systems.