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Srirattanawichaikul, Watcharin,Premrudeepreechacharn, Suttichai,Kumsuwan, Yuttana The Korean Institute of Electrical Engineers 2014 Journal of Electrical Engineering & Technology Vol.9 No.2
This paper presents a simple modified unipolar carrier-based pulsewidth modulation (CB-PWM) strategy for the three-level neutral-point-clamped (NPC) voltage source inverter (VSI). Analytical expressions for the relationship between modulation reference signals and output voltages are derived. The proposed modulation technique for the three-level NPC VSI includes the maximum and minimum of the three-phase sinusoidal reference voltages with zero-sequence voltage injection concept. The proposed modified CB-PWM strategy incorporates a novel method that requires only of one triangular carrier wave for generate the gating pulses in three-level NPC VSI. It has the advantages of being simplifying the algorithm with no need of complex two/multi-carrier pulsewidth modulation or space vector modulation (SVM) and it's also simple to implement. The possibility of the proposed CB-PWM technique has been verified though computer simulation and experimental results.
Watcharin Srirattanawichaikul,Suttichai Premrudeepreechachar,Yuttana Kumsuwan 대한전기학회 2014 Journal of Electrical Engineering & Technology Vol.9 No.2
This paper presents a simple modified unipolar carrier-based pulsewidth modulation (CBPWM) strategy for the three-level neutral-point-clamped (NPC) voltage source inverter (VSI). Analytical expressions for the relationship between modulation reference signals and output voltages are derived. The proposed modulation technique for the three-level NPC VSI includes the maximum and minimum of the three-phase sinusoidal reference voltages with zero-sequence voltage injection concept. The proposed modified CB-PWM strategy incorporates a novel method that requires only of one triangular carrier wave for generate the gating pulses in three-level NPC VSI. It has the advantages of being simplifying the algorithm with no need of complex two/multi-carrier pulsewidth modulation or space vector modulation (SVM) and it’s also simple to implement. The possibility of the proposed CB-PWM technique has been verified though computer simulation and experimental results.
A Simple Voltage and Frequency Control of VSI-Inverter-Fed Self-Excited Induction Generator Drive
Yuttana Kumsuwan,Watcharin Srirattanawichaikul,Suttichai Premrudeepreechachar 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
A simple voltage and frequency control for a self-excited induction generator (SEIG) is presented. The system is developed for a space vector modulation-voltage source inverter (SVM-VSI) and the three-phase squirrel-cage induction generator to regulate DC-link and generator voltages with voltage per frequency (V/f) control technique. The aim of this research is to a generated voltage with a constant magnitude and frequency at variable speed prime mover. The experimental results show a good performance of the system can be achieved by the proposed voltage and frequency controller.