In this study, single-phase current sensor Fault-Tolerant Control (FTC) for Three-Phase Induction Motor (TPIM) drives using a flux observer is proposed. In the proposed FTC scheme, a 3rd difference operator executes the Fault Detection (FD) task and the reconstruction of the faulted current is achieved through a flux observer. The presented FTC system is able to switch TPIM drive systems from normal mode to the faulty mode suitably. The proposed method in this study can be utilized in many industries particularly in electric vehicles, medical devices, and aerospace where TPIM drive systems are needed to continue the desired operation even during fault situations. The effectiveness of the proposed FTC system is confirmed by experiments on a 0.75kW TPIM drive platform. پرونده مقاله

This research investigates a simple method for Direct Rotor Field-Oriented Control (DRFOC) of star-connected 3-Phase Induction Motor (3Ph IM) drives under Single-Phase Open Fault (SPOF). The proposed control scheme includes a modified RFOC strategy in cooperation with a flux linkage observer. Most studies on this topic are intended for Indirect Rotor Field-Oriented Control (IRFOC), and hence are not appropriate at low speed operation due to using a pure integration for the flux angle calculation. To this end, a rotor flux linkage observer is designed which alleviates the speed and torque ripples of the faulty motor during low speed operation. The observer is capable of estimation of the rotor flux during healthy and SPOF conditions by only some modifications in the 3Ph IM parameters. The proposed DRFOC approach is tested under different conditions and the effectiveness of the proposed system is confirmed by experimental results. The results show the good fault tolerant capability and tracking performance of the proposed controller during different speeds. پرونده مقاله