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The paper deals with an optimal technical solution to realize autonomous water pumping systems combining a PV electric energy source with battery chemical storage to supply a centrifugal electrical pump. The goal is to accomplish an optimal trade-off between the rated peak power of the PV generator and the power capability of the battery system in order to let the battery assisted solar pumping system...
The paper presents an identification procedure able to detect open circuit failures in voltage source inverters. The procedure is suitable to equip fault tolerant electric motor drives and in principle only requires the measurement of the DC link current as it accomplishes a reconstruction of the inverter output phase currents from the DC link current measurement, thus eliminating the need of conventional...
This paper proposes a low-cost implementation of energy saving strategies in scalar control IM Drives including high speeds in a wide working range. This loss reduction control algorithm approximates and adapts to scalar control some optimized analytical relationships, proposed in vector control, for low cost implementation. Basically an “optimal” slip from the energetic point of view is calculated...
Fault tolerance of adjustable speed drives and ride-through capabilities against voltage sags, swells and under voltages have been widely addressed in the past. However, the research activities in these fields have been always focused only on conventional sensored motor drives. In this paper, a detailed analysis regarding the robustness of sensorless controlled electrical drives to inverter faults...
The paper describes the comparison between different high-performance low-cost-implementation techniques for the estimation of the rotor flux in medium-high speed sinusoidal AC motor drives. In sensorless estimation, rotor flux is estimated from measured terminal voltages and currents, and is used as a feedback in vector control schemes, achieving almost the same high-performance of sensored drives...
The paper proposes a novel control technique that is able to optimize the efficiency in scalar controlled induction motor drives. The proposed strategy is based on a constant-optimal slip control and is able to modify the magnetizing flux value increasing the efficiency at light loads. Differently from the optimization methods present in the literature, the proposed approach does not require the model...
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