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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS)
Huzainirah Ismail
Universiti Teknikal Malaysia Melaka
Control & Systems Engineering Electrical & Electronics Engineering

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Simple Switching Strategy for High-Torque Control Performance utilizing Neutral Point Clamped Multilevel Inverter Nor Faezah Alias; Auzani Jidin; Atikah Razi; Tole Sutikno; Huzainirah Ismail
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 3, No 4: December 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

Three-level Neutral Point Clamped (NPC) inverter allows the configuration of switching devices to operate at high voltage and produce lower current/voltage harmonics. It is known that, DTC of induction machine which employs hysteresis controller has major drawbacks namely larger torque ripple and variable switching frequency. This paper aims to propose a suitable voltage vector selection to provide better torque regulation and lower switching frequency by employing DTC with 3-level NPC multilevel inverter. A simple switching strategy was formulated using 7-level torque hysteresis and 2-level flux hysteresis controllers to give more options in selecting an appropriate voltage vector, inherently, according the motor operation conditions. The improvements offered were verified through simulations.DOI: http://dx.doi.org/10.11591/ijpeds.v3i4.5248
Co-Authors Atikah Razi Auzani Jidin Nor Faezah Alias Tole Sutikno