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Journal > International Journal of Power Electronics and Drive Systems (IJPEDS) > Simple Switching Strategy for High-Torque Control Performance utilizing Neutral Point Clamped Multilevel Inverter

 

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International Journal of Power Electronics and Drive Systems (IJPEDS)
Vol 3, No 4: December 2013
Simple Switching Strategy for High-Torque Control Performance utilizing Neutral Point Clamped Multilevel Inverter
Alias, Nor Faezah ( Universiti Teknikal Malaysia Melaka)
Jidin, Auzani ( Universiti Teknikal Malaysia Melaka)
Razi, Atikah ( Universiti Teknikal Malaysia Melaka)
Sutikno, Tole ( Universitas Ahmad Dahlan)
Ismail, Huzainirah ( Universiti Teknikal Malaysia Melaka)
Article Info   ABSTRACT
Published date:
01 Dec 2013
 
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.
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