TY - JOUR
T1 - Postfault operation of a nine-phase six-terminal induction machine under single open-line fault
AU - Massoud, Ahmed M.
AU - Ahmed, Shehab
AU - Abdel-Khalik, Ayman Samy
AU - Hamad, Mostafa S.
N1 - Funding Information:
Manuscript received March 20, 2017; revised May 25, 2017 and June 12, 2017; accepted June 22, 2017. Date of publication July 28, 2017; date of current version December 8, 2017. This work was supported by the Qatar National Research Fund (a member of the Qatar Foundation) under NPRP Grant 6-213-2-090. (Corresponding author: Ayman Samy Abdel-Khalik.) A. S. Abdel-Khalik is with the Electrical Engineering Department, Faculty of Engineering, Alexandria University, Alexandria 21544, Egypt (e-mail: [email protected]).
Publisher Copyright:
© 2017 IEEE.
PY - 2017
Y1 - 2017
N2 - This paper studies the postfault control of a nine-phase six-terminal induction machine (IM) during single open-line fault, which was recently proposed for high-power medium-voltage applications as a promising alternative to conventional six-phase IMs. The required optimal reference currents to provide prefault loading conditions under one-line open are derived using the two most common optimization criteria employed in multiphase drives, namely, maximum torque and minimum loss modes. A postfault controller, based on conventional decoupling Clarke's transformation, is then used to ensure the same controller structure under all conditions. Consequently, the machine characteristic curves, achievable torque, and stator copper losses under these different modes are compared. A comparison with a conventional asymmetrical six-phase winding is also given. A 1.5-Hp prototype IM is used for experimental verification.
AB - This paper studies the postfault control of a nine-phase six-terminal induction machine (IM) during single open-line fault, which was recently proposed for high-power medium-voltage applications as a promising alternative to conventional six-phase IMs. The required optimal reference currents to provide prefault loading conditions under one-line open are derived using the two most common optimization criteria employed in multiphase drives, namely, maximum torque and minimum loss modes. A postfault controller, based on conventional decoupling Clarke's transformation, is then used to ensure the same controller structure under all conditions. Consequently, the machine characteristic curves, achievable torque, and stator copper losses under these different modes are compared. A comparison with a conventional asymmetrical six-phase winding is also given. A 1.5-Hp prototype IM is used for experimental verification.
KW - Asymmetrical winding
KW - Fault-tolerant operation
KW - High-power induction machine (IM)
KW - Nine-phase machine
KW - Single layer winding
KW - Six-phase machine
UR - http://www.scopus.com/inward/record.url?scp=85047359721&partnerID=8YFLogxK
U2 - 10.1109/TIE.2017.2733471
DO - 10.1109/TIE.2017.2733471
M3 - Article
AN - SCOPUS:85047359721
SN - 0278-0046
VL - 65
SP - 1084
EP - 1096
JO - IEEE Transactions on Industrial Electronics
JF - IEEE Transactions on Industrial Electronics
IS - 2
M1 - 2733471
ER -