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International Journal of

Recent Trends in Engineering

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International Journal of Recent Trends in Engineering (IJRTE)

ISSN 1797-9617

Volume 1, Number 3, May 2009

Issue on Electrical & Electronics

Page(s): 129-134

Optimized Hybrid Phase Disposition PWM Control Method for Multilevel Inverter

C.Govindaraju and K.Baskaran

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Abstract

This paper presents a new variation of hybrid phase disposition pulse width modulation technique suitable for cascaded multilevel inverter. A hybrid PDPWM is developed based on low frequency PWM and high frequency Sinusoidal PWM. An optimized sequential switching scheme introduced in this proposed method to equalize electro static and electro magnetic stress among the power devices. It is confirmed that the proposed technique offers significantly lower switching losses and switching transitions. Furthermore, the proposed hybrid PDPWM offers better harmonic performance compared to its conventional PWM counterpart. Simulation results are included in this paper in order to confirm the effectiveness of the proposed technique.

Index Terms

Pulse width modulation, phase disposition pulse width modulation, hybrid phase disposition pulse width modulation, cascaded multilevel inverter

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