Open AccessClosed‐loop hybrid direct torque control for medium voltage induction motor drive for performance improvement
Author(s) -
Patil UdayKumar V,
Suryawanshi Hiralal Murlidhar,
Renge Mohan M.
Publication year - 2014
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.2012.0509
Subject(s) - control theory (sociology) , direct torque control , space vector modulation , torque ripple , vector control , induction motor , torque , computer science , engineering , inverter , voltage , physics , control (management) , artificial intelligence , electrical engineering , thermodynamics
This study presents the hybrid direct torque control (HDTC) method for medium voltage‐range induction motor (IM) drive. The control method comprising the torque control by rotor‐reference frame quadrature‐axis current instead‐of conventional DTC and speed control similar as in space‐vector‐modulation (SVM)‐DTC is proposed. Hence the scheme is referred as HDTC. A carrier‐based space‐vector‐modulation controlled five‐level diode‐clamped multilevel inverter with proposed control scheme is providing promising‐step towards performance enhancement of IM drive in respect of torque ripple contents and steady‐state performance over wide speed‐range. The effectiveness of the proposed control scheme is confirmed by comparison with DTC in matlab‐simulink. A prototype is fabricated for three‐phase, 3‐HP IM. A 32‐bit fixed‐point DSP‐based control algorithm is developed for DTC and the proposed control scheme. Experimental results show qualitative improvement in performance in terms of reduction in torque ripple by 30%, fast dynamic response even at low speed and improvement in steady state characteristics.