Comparison between Two Modulation Techniques for Three Phase Inverters from a Hardware Implementation Point of View

This paper presents a comparison between two modern modulation techniques applied to three phase inverters from a hardware implementation point of view. The considered techniques are the sinusoidal pulse width modulation with zero sequence injection and the space vector modulation. Both these techniques conduct to the same result regarding supply voltage usage efficiency and harmonic content of the resulted signals. However, they are based on different approaches and, in consequence, need different algorithms for implementation. Both the modulation algorithms were implemented in hardware on FPGA, and the resulted designs are compared for resource usage efficiency, obtained speed and ease of integration within a complex AC drive control system.