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A PWM scheme for a 3-level inverter cascading two 2-level inverters

Somasekhar, VT and Gopakumar, K and Bauu, MR and Mohapatra, KK and Umanand, L (2002) A PWM scheme for a 3-level inverter cascading two 2-level inverters. In: Journal of Indian Insitute of Science, 82 (1). pp. 23-36.


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This paper shows that 3-level inversion can be achieved by connecting two 2-level inverters in cascade. Two isolated power supplies with DC link voltages are required for the proposed circuit topology. The voltages constitute half of that of a conventional 3-level inverter topology. Neutral point fluctuation is absent in the proposed scheme when compared to conventional neutral point clamped 3-level inverter. A sine-triangle-based PWM scheme is presented for the proposed topology.

Item Type: Journal Article
Publication: Journal of Indian Insitute of Science
Publisher: Indian Institute of Science
Keywords: Multilevel inverter;PWM technique
Department/Centre: Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology)
Date Deposited: 02 Jun 2004
Last Modified: 19 Sep 2010 04:12
URI: http://eprints.iisc.ac.in/id/eprint/54

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