The space vector modulation (SVM) schemes are extensively employed to attain superior harmonic performance while improving the dc-bus utilization in multilevel inverter (MLI) fed electric drive applications. However, it entails intricate calculations such as identification of space vector position and selection of redundancy switching vectors in each sector. This process increases the complexity of SVM implementation for multi-phase MLIs. In this article, a single-phase sample average modulator is proposed for MLI-fed electric drive applications. The proposed modulator is designed by using the volt-sec balance principle, and is applied to a four-level inverter (FLI). In this method, the nearest two voltage levels are used in each sampling time to modulate each phase of MLI independently. Moreover, the three-phase equivalent of the proposed sample average modulator results in SVM implementation without the complex calculations required by conventional SVM methods. Hence, the proposed sample average modulator can be easily extended to multi-phase MLI systems. Additionally, a capacitor voltage balancing method is developed to regulate the floating capacitor (FC) voltages in an FLI. The proposed modulator and voltage balancing performance is validated on an FLI through MATLAB simulations at steady-state and transient scenarios.
Single-Phase Sample Average Modulator for Multilevel Inverter-fed Electric Drive Applications
31.07.2024
2091887 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Single Phase Multilevel Inverter with Reduced Components
IEEE | 2019
|Novel current-source multilevel inverter driven by single gate drive power supply
Online Contents | 2009
|Switching Circuit and Drive for Cascaded Multilevel Inverter
TIBKAT | 2019
|Switching Circuit and Drive for Cascaded Multilevel Inverter
Springer Verlag | 2019
|