Diode
Clamped Three Level Inverter Using Sinusoidal PWM
Abstract:
An inverter is a circuit which converts dc power
into ac power at desired output voltage and frequency. The ac output voltage
can be fixed at a fixed or variable frequency. This conversion can be achieved
by controlled turn ON & turn OFF or by forced commutated thyristors
depending on applications. The output voltage waveform of a practical inverter
is non sinusoidal but for high power applications low distorted sinusoidal
waveforms are required. The filtering of harmonics is not feasible when the
output voltage frequency varies over a wide range. There is need for
alternatives. Three level Neutral Point Clamped inverter is a step towards it.
Keywords:
1.
Harmonics
2.
Inverter
3.
THD
4.
PWM
Software: MATLAB/SIMULINK
Fig.1.
Diode Clamped Three Level Inverter
Conclusion:
In
normal inverters odd harmonics are present which causes distortion of the
output waveform. By using the “THREE LEVEL DIODE CLAMPED INVERTER” we can
eliminate some number of harmonics hence increasing the efficiency of the
inverter.
References:
[1] A.Mwinyiwiwa, Zbigneiw Wolanski, ‘Microprocessor
Implemented SPWM for Multiconverters with Phase-Shifted Triangle Carriers’ IEEE
Trans. On Ind. Appl., Vol. 34, no. 3, pp 1542-1549, 1998.
[2]
J. Rodriguez, J.S. Lai, F. Z. Peng, ’ Multilevel Inverters: A Survey of
Topologies, Controls and Applications’, IEEE Trans. On Ind.
Electronics, VOL. 49, NO. 4, pp. 724-738, AUGUST 2002
[3]
D. Soto, T. C. Green, ‘A Comparison of High Power Converter Topologies for the
Implementation of FACTS Controller’, IEEE Trans. On Ind. Electronics, VOL.
49, NO. 5, pp. 1072-1080, OCTOBER 2002.
[4]
Muhammad H. Rashid, Power Electronics: Circuits, Devices and Applications,
Third edition, Prentice Hall of India, New Delhi, 2004.
[5]
Dr. P. S. Bimbhra, Power Electronics, Khanna Publishers, Third Edition,
Hindustan Offset Press, New Delhi-28, 2004.
