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A Seven-Switch Five-Level Active-Neutral-Point-Clamped Converter and Its Optimal Modulation Strategy ABSTRACT: Multilevel inverters are receiving more attentions nowadays as one of preferred solutions for medium and high power applications. As one of the most popular hybrid multilevel inverter topologies, the Five-Level Active-Neutral-Point-Clamped inverter (5L-ANPC) combines the features of the conventional Flying-Capacitor (FC) type and Neutral-Point-Clamped (NPC) type inverter and was commercially used for industrial applications. In order to further decrease the number of active switches, this paper proposes a Seven-Switch 5L-ANPC (7S-5L-ANPC) topology, which employs only seven active switches and two discrete diodes. The analysis has shown a lower current rating can be selected for the seventh switch under high power factor condition, which is verified by simulation results. The modulation strategy for 7S-5L-ANPC inverter is discussed. A 1KVA single-phase experimental prototype is built to verify the validity and flexibility of the proposed topology and modulation method.
KEYWORDS: 1. Multilevel inverter 2. Active-Neutral-Point-Clamped (ANPC) inverter 3. Flying-Capacitor 4. Pulse-Width-Modulation (PWM)
SOFTWARE: MATLAB/SIMULINK
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Gmail: asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245