FPGA based direct matrix converter: The harmonic analysis with three modulation techniques

This paper proposes, a single phase direct matrix converter using Insulated gate bipolar transistors, where undesired harmonics are minimized using three modulation techniques, namely: Sinusoidal Pulse Width Modulation, Delta Modulation and Adaptive Delta Modulation (ADM). This converter not only works as a Cyclo-Inverter (CI) but also as a Cyclo-Converter (CC). For these modulation techniques, a comparative performance analysis is done considering output voltage and associated Total Harmonic Distortion (THD) waveforms, simulated in the MATLAB/Simulink environment as well as implemented on the FPGA, for both the modes of operation. Simulated results and hardware implementation validates, that the ADM outperforms on the whole.