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Novel carrier PWM scheme to control neutral point voltage fluctuations in three-level voltage source inverter

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3 Author(s)
Ratnayake, K.R.M.N. ; Dept. of Electr. & Electron. Eng., Gifu Univ., Japan ; Murai, Y. ; Watanabe, T.

This paper presents a simple PWM technique to control neutral point voltage of the multi-level inverter. The multi-level power conversion systems have been receiving increasing attention, especially for high power applications. The proposed method employs a modified version of multi-level sinusoidal pulse width modulation (SPWM) scheme. This method avoids the requirement of high capacity DC link capacitors, which are employed in most of the present three-level inverter industrial applications. The new PWM scheme is less complex than most of the other available neutral point clamping control methods

Published in:

Power Electronics and Drive Systems, 1999. PEDS '99. Proceedings of the IEEE 1999 International Conference on  (Volume:2 )

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