IRFOC of Induction Motor Drives Under Open-Phase Fault Using Balanced and Unbalanced Transformation Matrices

Post‐fault operation strategy for single open‐phase fault in three‐phase induction motor drives

“…In this experiment, the TPIM operates in healthy condition and the values of the control parameters and transformation matrix are based on (29a)-(29c). Then, SOPF occurs at t = 20.6 s. After fault detection, the values of the control parameters and transformation matrix change to the new values as given in ( 6) and (28). Since the contribution of this paper focuses on the post-fault operation of wye-connected TPIM drives during SOPF, a fast fault detection mechanism based on [39] is considered for this experiment.…”

“…However, this method has complex control structure because of using many transformation matrices. In [28], an indirect RFOC technique was proposed for wye‐connected TPIM drives against SOPF based on symmetrical and asymmetrical transformation matrices. This strategy suffers from derivative components in the RFOC equations which are not suitable for control purposes.…”

“…This strategy suffers from derivative components in the RFOC equations which are not suitable for control purposes. In addition, the pure integrator is another problem of the presented method in [28].…”

“…In this case, the introduced control method in this research has a simple control structure compared to [25]. The used direct RFOC system in this research has good performance at low speed operation compared to indirect RFOC systems in [23, 25, 27, 28] due to the rotor flux estimation.…”

“…Besides the inverter topology reconfiguration, some modifications in the control structure during post-fault operation are required. Different control strategies have been proposed to manage SOPF of delta-connected TPIM drives [20,21] and wye-connected TPIM drives [3,17,[22][23][24][25][26][27][28][29]. Vector control techniques for wye-connected TPIM drives during open-phase fault have been proposed in [17,26] based on preserving the fundamental magneto-motive force (MMF) unchanged during prefault and post-fault operations.…”