Gheorghe - Daniel Andreescu

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Field oriented (FOC) and direct torque and flux (DTFC) control of AC drives are credited with fast torque response, but, in general purpose sensorless AC drives, the on-line software and hardware control effort and their reliability may seem prohibitive for general applications or, at least for synchronous motors, a starting strategy is necessary. The(More)
Two methods of extracting the rotor position and speed for a sensorless single phase BLDC-PM motor drive by measuring only the phase current are presented here. Both methods are based on a generated orthogonal flux system. The first method extracts the position information by using the tan<sup>&#x2212;1</sup> function and then an improved observer is(More)
This paper presents practical laboratories for teaching purpose in Supervisory Control and Data Acquisition (SCADA) systems. A SCADA system is described in terms of architecture, process interfaces, functionality, and application development facilities. These concepts are implemented on an integrated automation system, particularly for digital control of(More)
This paper presents two control strategies for the sensorless vector control of permanent magnet reluctance synchronous motor (PM-RSM) in a wide speed range: the zero q-axis flux control and an approximate maximum torque per current control. The approximate maximum torque per current control is a novel torque - dq current referencer which is capable to(More)
A motion sensorless control for single phase permanent magnet brushless d.c. (PM-BLDC) motor drives, based on flux integration and prior knowledge of the PM flux/position characteristic is proposed here and an adequate correction algorithm is adopted, in order to increase the robustness to noise and to reduce the sensitivity to accuracy of flux linkage(More)
This paper develops a high dynamic and robust speed-torque control system for servo drives based on adaptive observer and self-tuning techniques with on-line inertia identification. Only the rotor position is measured even for a low precision shaft encoder. The instantaneous speed and the disturbance torque are accurately estimated by an extended Luenberger(More)
A novel position and speed estimator for single phase permanent magnet brushless d.c. (PMBLDC) motor drives, based on flux integration and prior knowledge of &#x03A8;<inf>PM</inf> (&#x03B8;) is proposed here and an adequate correction algorithm is adopted in order to increase the robustness to noise and to reduce the sensitivity to accuracy of flux linkage(More)
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