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The regulation by DTC of the induction motor is a quite " natural " method, being much lighter, as mathematical support, than the vector control, regardless the type of field considered for orientation. Despite its simplicity, the practical implementation of the method rise serious problems, mainly due to the fact that the sampling period for regulation(More)
The power transformers are essential equipment in all transport and distribution grids. Minor faults or defects of this equipment can lead to ravaging effects. The most part of the monitoring and diagnosis systems are developed around expert systems. The expert systems regroup the methods based on analytical models and the ones based on knowledge on the(More)
Reliability of electromechanical actuation systems as those used in aerospace applications may be improved by a proper choice of the motor, of its control strategy and of the architecture of the power electronics feeding the motor. This paper presents a Simulink library for the simulation of the motor and of its control electronics allowing to choose(More)
The paper deals with the vector control and predictive control of the induction motor. For the vector control, the rotor flux oriented one is pointed out, with highlight on the voltage source inverter type. The influence of the most important parameter variations (e.g. stator resistance) is discussed. A simple (and practical) method for avoiding these(More)
The paper deals with a technique which uses the predictive concepts in order to obtain the pulse width modulation strategy of a voltage fed inverter. After the technique is briefly described, it is applied for the case when the inverter supplies an induction motor, the reference values of the currents being obtained from a classical vector control scheme.(More)
In this paper a combination of the feedback linearizing control technique and Glover-McFarlane control method is applied for the control of a synchronous motor. The use of feedback linearization requires the complete knowledge of the nonlinear system. In practice, there are many processes whose dynamics is very complex, highly nonlinear and usually(More)
In heavy duty drives in the range of hundreds kW, like cement and minerals industries, wound rotor induction motors are used. Important users make use of hundred of such drives, summing hundreds of MW. This type of motors have technical capabilities to easily operate at variable speed. Despite this simple capability, the large amount of losses which occur(More)
The paper applies the diagnosis method based on the analytic model by investigating the output waveforms of the currents, torque and speed specific to a PMSM driving system. Several faults are simulated: open phase, entire phase short circuit in two situations (with and without current measurement, short circuit before and after current sensor respectively)(More)