Design and implementation of novel digital SPWM waveform
Wei Li · Modern Electronics Technique · 2013
In order to effectively reduce harmonics of the inverter load,and avoid direct connection phenomenon of the same leg,this paper gives a novel scheme which can produce digital SPWM waveform based on FPGA.Combined with the technology of the direct digital synthesizer,the scheme produces the digital sine wave and triangular wave in FPGA using the hardware description language,and then produces required waveform using the direct comparison.This paper uses the novel translation technology of digital sine wave or digital triangular wave to produce required dead zone.Finally,this paper proposes the method of solving several difficulties in producing digital SPWM waveform.