Antoni Sudrià

Low cost sensorless control of permanent magnet motors - an overview and evaluation

This paper provides a review of the literature addressing sensorless operation of PM brushless machines. The methods explained are state-of-the-art of open and closed loop control strategies. The closed loop review includes those methods based on voltage and current measurements, and algebraic manipulations of machine equations, those methods based on back emf measurements, and those methods based on novel techniques not included in the previous categories. A review of machine model equations is also treated. The paper concludes with a comparison table including all main features for all control strategies

Comparative Experiences in Remote Automation Laboratories with Real Plants

In recent years, there has been a significant increase in remote learning courses. In some disciplines, including PLC (Programmable Logic Controller) automation, doing laboratory practice ‘at home’ with all the required material is difficult. In these cases, the possibility of doing laboratory practice remotely is of especial interest. We can use simulators to make an applet that simulates a PLC, but we discarded this because the students saw the practices as very artificial and unrealistic and hence their motivation decreased. In this paper, we describe how we have tried several possibilities of remote PLC programming and how their advantages and drawbacks have been analysed.