A robust diagnosis method for speed sensor fault based on stator currents in the RFOC induction motor drive

Cuong Dinh Tran


A novel diagnosis method based on a combination of stator currents, rotor flux, and rotor time constant (RTC) has been proposed to detect the failure states of the speed sensor in the induction motor drive (IMD) systems. The IMD applies rotor field-oriented control (RFOC) method to control the speed and torque for both healthy sensor condition and failure condition. An algorithm of RTC estimation is also applied to improve the precision of the proposed diagnosis method. MATLAB/Simulink software has been applied to implement the simulations in various speed ranges. The achieved results have demonstrated the capability and development prospects of this method against speed sensor fault.


Diagnosis; Fault-tolerant-control (FTC); Induction motor (IM); RFOC; Speed sensor


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DOI: http://doi.org/10.11591/ijece.v10i3.pp%25p
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