Open AccessTorque ripple reduction technique with improved flux response for a direct torque control induction motor drive
Author(s) -
Singh Bhoopendra,
Jain Shailendra,
Dwivedi Sanjeet
Publication year - 2013
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2012.0121
Subject(s) - direct torque control , torque ripple , control theory (sociology) , torque motor , torque , torque limiter , stall torque , induction motor , vector control , reduction (mathematics) , computer science , control (management) , engineering , physics , mathematics , electrical engineering , voltage , artificial intelligence , geometry , thermodynamics
The availability of limited voltage vectors in a conventional direct torque control drive fed from a two‐level inverter causes torque and current ripples. In this study, a new torque ripple reduction technique with a modified look up table incorporating a larger number of synthesised non‐zero active voltage vectors is proposed to overcome the limitations of the conventional and duty ratio control switching strategies. The voltage vector selection criteria in the proposed technique are based to prevent the stator flux demagnetisation during the low‐speed operation with significant reduction in torque and current ripple. The proposed switching strategy is investigated through simulation and experimentally validated on a test drive.