In this research, a vector control strategy based on Indirect Rotor Field-Oriented Control (IRFOC) for Star-Connected Three-Phase Induction Motor (SCTPIM) drives under Open-Phase Fault (OPF) using balanced and unbalanced Transformation Matrices (TMs) is proposed. Most of the current works studying SCTPIM drives under this type of fault are based on using two unbalanced TMs and ignore the leakage inductance in the FOC equations. This research studies a novel control strategy, considering the leakage inductance in the FOC equations of a SCTPIM drive under OPF. It is shown that using an unbalanced TM for stator current components and the conventional balanced TM for stator voltage components, it is possible to control a SCTPIM under OPF using a modified IRFOC system. The proposed vector control scheme is simulated and implemented using Matlab/M-File software and DSP/TMS320F28335 controller board for a 0.75kW SCTPIM drive system. Results show that the introduced IRFOC technique can satisfactorily control the SCTPIM under OPF condition.

This article presents a novel Direct Field‐Oriented Control (DFOC) strategy for Fault‐Tolerant Control (FTC) of wye‐connected 3‐Phase Induction Machine (3‐PIM) drives under the stator winding open‐phase failure. In the proposed control strategy, instead of flux measurement, an Extended Kalman Filter (EKF) for flux estimation is used. The introduced controller with minor modifications can be used during normal and stator winding open‐phase failure conditions. With the proposed DFOC system, the speed and torque pulsations that normally happen during the open‐phase failure can be reduced. The performances of the proposed EKF‐based DFOC strategy and the conventional control strategy for a faulted machine using simulations and experiments under different operation conditions are compared. Simulation and experimental results demonstrated an important improvement in speed and torque pulsations through this type of fault. Results also confirmed the superiority of the proposed EKF‐based DFOC scheme over the conventional control scheme to balance the faulted machine phase currents.

Three-Phase Induction Machines (TPIMs) are widely used in industrial drive systems. The popularity of TPIMs is due to their simplicity, robustness, low size and cost. In harsh industrial environments, due to extra electrical, magnetic, and thermal stresses, different faults in TPIMs can happen. One of the challenging subjects for many researchers is the development of control methods for TPIMs during fault conditions. Open-circuit fault in the stator windings of TPIMs is one of the most common types of faults in industrial drive systems. The aim of this research is to present a review on existing control methods for TPIM drives during open-circuit fault. These control methods are classified based on Magneto-Motive Force (MMF), Transformation Matrices (TMs), and harmonic injection. An overall description of each method is discussed and a comprehensive list of references is reported for each method. This review provides some recommendations on different control strategies for the research and development of TPIM drives during open-circuit fault.