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In the paper the concept of the novel speed and rotor flux observer with additional stator and rotor resistance estimator is presented. System is checked from the safety point of view and possibility of the application in the Fault Tolerant Control (FTC) systems. Simulation are performed in the Direct Field Oriented Control (DFOC). As a based speed estimator the MRASCC was used. Influence of the stator...
This paper presents the application of narrowband detection wavelet filters, which use the Legendre orthogonal polynomial family, in the diagnostics of coil shorting in induction motors. Wavelet orthonormal bases were built with the use of the recurrent relationships generating higher-degree Legendre polynomials. For the scaling function constructed in the form of linear combination of Legendre polynomials...
The article presents the possibility of using an axial flux in the detection of electrical faults in induction motors. The work presents results obtained for a faulty rotor squirrel cage and a stator winding short-circuit. Fault detection and identification is based on the analysis of symptoms obtained from the Fast Fourier Transform of a voltage induced by an axial flux in a measurement coil. The...
The paper presents problems related to the design and the stability of adaptive proportional observer which is used in sensorless, field oriented control system for estimation of magnetic flux and motor speed of induction motor. The gain matrix of the observer was determined by pole placement method in such a way, that the observer without adaptation has only real poles. It has been shown that adaptive...
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