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Abstract
The digital implementations of Sinusoidal Pulse Width Modulation (SPWM) generators have dominated over their counterparts based on analog circuits. In this paper, an FPGA- based SPWM generator is presented, which is capable to operate at switching frequencies up to 1 MHz (requiring FPGA operation at 100–160 MHz), thus it is capable to support the high switching frequency requirements of modern single-phase dc/ac power converters. The proposed design occupies a small fraction of a medium-sized FPGA and, thus, can be incorporated in larger designs. The post layout simulation and experimental results confirm that compared to the past-proposed SPWM generation designs, the SPWM generator presented in this paper exhibits much faster switching frequency, lower power consumption, and higher accuracy of generating the desired SPWM waveform. The digital SPWM generator implementations have dominated over their counterparts based on analog circuits, since they offer higher noise immunity and less susceptibility to voltage and temperature variations typically , microcontrollers, Digital Signal Processors (DSPs) or Field Programmable Gate Arrays (FPGAs) are used for the implementation of the SPWM generation unit and the execution of dc/ac inverter control algorithms.