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SPEED SENSOR FAULTS DIAGNOSIS IN AN INDUCTION MOTOR VECTOR CONTROLLED DRIVE

2017; Technical University of Košice; Volume: 17; Issue: 1 Linguagem: Inglês

10.15546/aeei-2017-0007

1338-3957

Mohamed Bouakoura, Nasreddine NAĂŹT-SAĂŹD, Mohamed-Said NAĂŹT-SAĂŹD,

Hydraulic and Pneumatic Systems

Many induction motor speed controllers contain a speed or position sensor.This last is required to provide accurate measurement.A faulty speed sensor decreases the controller performance dramatically.Hence, a fault diagnosis and detection technique is necessary.This paper deals with several faults which affect the speed sensor used in an induction motor vector controlled drive.Three different faults are considered; offset fault, uncertainty of measurement, and total loss of feedback information.Then a detection strategy is suggested based on the computation of the energy of the average standard deviation of speed data.Simulation on Matlab/Simulink and experiments were carried out to show the effect of each fault on the vector control performance and to verify the effectiveness of the proposed detection scheme.