A Fast-Processing Modulation Strategy for Three-Phase Four-Leg Neutral-Point-Clamped Inverter Based on the Circuit-Level Decoupling Concept
Publication: Research - peer-review › Article in proceedings – Annual report year: 2012
In this paper, a modulation strategy based on the circuit-level decoupling concept is proposed and investigated for the three-level four-leg neutral-point-clamped (NPC) inverter,with the aim of delivering power to all sorts of loads, linear/nonlinear and balanced/unbalanced. By applying the proposed modulation strategy, the four-leg NPC inverter can be decoupled into three three-level Buck converters in each defined operating section. This makes the controller design much simpler compared to the conventional four-leg NPC inverter controllers. Also, this technique can be implemented with a simple logic and can be processed very quickly. Moreover, the switching loss is reduced substantially and the dc-link capacitors’ voltages balance is also achieved without any feedback control. The proposed modulation technique is verified by the experiment.
|Title of host publication||Proceedings of The International Power Electronics and Motion Control Conference (IPEMC)|
|State||Published - 2012|
|Event||The International Power Electronics and Motion Control Conference - Harbin, China|
|Conference||The International Power Electronics and Motion Control Conference|
|Period||02/06/2012 → 05/06/2012|
|Citations||Web of Science® Times Cited: No match on DOI|
- Circuit-level decoupling, Inverter, Neutral-pointclamped, PWM modulation, Three-level, Capacitors, Phase modulation, Voltage Control
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