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Uniform Overlapped Multi-Carrier PWM for a Six-Level Diode Clamped Inverter

Authors: S.Srinivas

Abstract:

Multi-level voltage source inverters offer several advantages such as; derivation of a refined output voltage with reduced total harmonic distortion (THD), reduction of voltage ratings of the power semiconductor switching devices and also the reduced electro-magnetic-interference problems etc. In this paper, new carrier-overlapped phase-disposition or sub-harmonic sinusoidal pulse width modulation (CO-PD-SPWM) and also the carrieroverlapped phase-disposition space vector modulation (CO-PDSVPWM) schemes for a six-level diode-clamped inverter topology are proposed. The principle of the proposed PWM schemes is similar to the conventional PD-PWM with a little deviation from it in the sense that the triangular carriers are all overlapped. The overlapping of the triangular carriers on one hand results in an increased number of switchings, on the other hand this facilitates an improved spectral performance of the output voltage. It is demonstrated through simulation studies that the six-level diode-clamped inverter with the use of CO-PD-SPWM and CO-PD-SVPWM proposed in this paper is capable of generating multiple levels in its output voltage. The advantages of the proposed PWM schemes can be derived to benefit, especially at lower modulation indices of the inverter and hence this aspect of the proposed PWM schemes can be well exploited in high power applications requiring low speeds of operation of the drive.

Keywords: Diode clamped inverter, Pulse width modulation, Six level inverter, carrier based PWM.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1063413

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References:


[1] Akira Nabae, Isao Takahashi and Hirofumi Akagi, "A Neutral-Point Clamped PWM Inverter", IEEE-Trans. on Ind. Appl. Vol.IA-17, No.5, Sep/Oct 1981, pp.518-523.
[2] T.A.Maynard and Foch, "Imbricated cells multi-level voltage source inverters for high power applications", EPE Journal, Vol.3, No.2, 1993, pp.99-106.
[3] X.Yuan and I.Barbi "Fundamentals of a new diode clamping multilevel inverter," IEEE Trans. Power Electronics., vol. 15, pp. 711, Jul. 2000.
[4] J.Rodriguez, J. S.Lai, and F.Z.Peng, "Multilevel Inverters: A Survey of topologies, Controls, and Applications," IEEE Trans. on Ind. Electronics, Vol 49, No.4, August 2002, pp.724 - 738.
[5] H.Stemmler, P.Guggenbach," Configurations of High-Power Voltage Source Inverter Drives", Proc. EPE Conf., 1993, pp.7 - 14.
[6] V.T.Somasekhar and K.Gopakumar, "Three-level inverter configuration cascading two-level inverters", IEE Proc. of Electr. Power Appl., Vol.150, No.3, May 2003, pp.245-254.
[7] J.Holtz, "Pulsewidth modulation- A survey", IEEE Trans. on Industrial Electronics, Vol. 30, No. 5, Dec 1992, pp. 410-420.
[8] Dae-Woong Chung, Joohn-Sheok Kim and Seung-Ki Sul, "Unified Voltage Modulation Technique for Real-Time Three-Phase Power Conversion", IEEE-Trans. on Ind.Appl, Vol.34, No.2, March/April 1998, pp.374-380.
[9] B.P.McGrath, D.G.Holmes and T.Meynard, "Reduced PWM Harmonic Distortion for Multilevel Inverters Operating over a Wide Modulation Range", IEEE Trans. on Power Electronics, vol. 21, no.4, July 2006, pp. 941-949.
[10] G.Carrara, S.Gardella, M.Marchesoni, R.Salutari, G.Sciutto, "A New Multilevel PWM Method: A Theoretical Analysis," IEEE Trans. on Power Electronics, vol. 7, no. 3, July 1992, pp. 497-505.
[11] L.M.Tolbert, and T.G.Habetler, "Novel Multilevel Inverter Carrier- Based PWM Method", IEEE-Trans. on Ind.Appl, Vol.35, No.5, Sept./Oct 1999, pp.1098-1107.
[12] L.Li.D.Czarkowski, Y.Liu and P.Pillay, "Multilevel space vector PWM technique based on phase-shift harmonic suppression," in Proc. IEEE Annu. APEC Conf., 2000, Vol.1, pp. 535-541.
[13] B.P.McGrath and D.G.Holmes, "Multicarrier PWM strategies for multilevel inverters", IEEE Trans. on Power Electronics, vol. 49, no.4, Aug 2002, pp. 858-867.
[14] P.C.Loh, D.G.Holmes, Y.Fukuta and T.A.Lipo, "Reduced Common- Mode Modulation Strategies for Cascaded Multilevel Inverters", IEEETrans. on Ind.Appl, Vol.39, No.5, Sept./Oct 2003, pp.1386-1395.
[15] R.Naderi and A.Rahmati, "Phase-Shifted Carrier PWM Technique for General Cascaded Inverters", IEEE Trans. on Power Electronics, vol.23, no. 3, May 2008, pp. 1257-1269.