TY - JOUR
T1 - A Generalized Fault Tolerant Control Based on Back EMF Feedforward Compensation
T2 - Derivation and Application on Induction Motors Drives
AU - Tousizadeh, Mahdi
AU - Yazdani, Amirmehdi
AU - Che, Hang Seng
AU - Wang, Hai
AU - Mahmoudi, Amin
AU - Rahim, Nasrudin Abd
PY - 2023/1/1
Y1 - 2023/1/1
N2 - In this paper, a fault-tolerant three-phase induction drive based on field-oriented control is studied, and an analytical approach is proposed to elucidate the limitations of FOC in flux-torque regulation from the controller perspective. With an open-phase fault, the disturbance terms appear in the controller reference frame and degrade the controller performance when operating in a d-q plane with DC quantities. In addition, the hardware reconfiguration, which is essential to operate faulted three-phase drives, causes substantial change in the way the control parameters vd, vq are reflected onto the machine terminals. An accurate understanding of the feedforward term, by considering the open-phase fault and the hardware modifications, is provided to re-enable the FOC in presence of an open-phase fault. Furthermore, the concept of feedforward term derivation is generically extended to cover multiphase induction drives encountering an open-phase fault whereby no hardware reconfiguration is intended. The proposed method is explained based on a symmetrical six-phase induction and can be extended to drives with a higher number of phases. The effectiveness of the proposed derivation method, which is required to form a feedforward fault-tolerant controller, is verified and compared through the simulation and experiment, ensuring smooth operation in postfault mode.
AB - In this paper, a fault-tolerant three-phase induction drive based on field-oriented control is studied, and an analytical approach is proposed to elucidate the limitations of FOC in flux-torque regulation from the controller perspective. With an open-phase fault, the disturbance terms appear in the controller reference frame and degrade the controller performance when operating in a d-q plane with DC quantities. In addition, the hardware reconfiguration, which is essential to operate faulted three-phase drives, causes substantial change in the way the control parameters vd, vq are reflected onto the machine terminals. An accurate understanding of the feedforward term, by considering the open-phase fault and the hardware modifications, is provided to re-enable the FOC in presence of an open-phase fault. Furthermore, the concept of feedforward term derivation is generically extended to cover multiphase induction drives encountering an open-phase fault whereby no hardware reconfiguration is intended. The proposed method is explained based on a symmetrical six-phase induction and can be extended to drives with a higher number of phases. The effectiveness of the proposed derivation method, which is required to form a feedforward fault-tolerant controller, is verified and compared through the simulation and experiment, ensuring smooth operation in postfault mode.
KW - AC machines
KW - back EMF
KW - fault-tolerant control
KW - feedforward compensation
KW - induction motors
UR - http://www.scopus.com/inward/record.url?scp=85145776474&partnerID=8YFLogxK
U2 - 10.3390/en16010051
DO - 10.3390/en16010051
M3 - Article
AN - SCOPUS:85145776474
SN - 1996-1073
VL - 16
JO - Energies
JF - Energies
IS - 1
M1 - 51
ER -
