Space Vector Pulse Width Modulation of a Multi-Level Diode Clamped Converter with Experimental Verification
This paper presents the analysis of a multi-level diode clamped converter (DCC) which is implemented using space-vector pulse width modulation (SVPWM) technique, widely considered as the most efficient and easily applied modulation technique in most industrial drives and control applications. It also focuses on the step by step development of MATLAB /SIMULINK modeling of the space vector pulse-width modulation and the spectral analysis of the resultant waveforms obtained from the modulation results were carried out. Results of the simulations obtained from DCC using SVPWM were equally presented and analyzed. This paper used generic on-time application method to realize the application time for the zero vector and two adjacent active vectors in determining the switching process of the multilevel DCC, quite unlike the look-up table which is common in this area. To verify the analysis, a small scale experimental work, was carried out. All experimental works were done in the laboratory and the results confirm the simulation results obtained from the SIMPLORER Student version 6 Software used in simulating the un-modulated three-level diode clamped converter.