Three Phase Sinusoidal Waveform Generator using Microcontroller

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Punyaphat Chofabandit
Boonrueang Wangsilabat


This paper proposes 3-phase sinusoidal waveform generator using microcontroller which is produced the address of ROM and be frequency adjuster of sinusoidal waveform. IC PROM 3 units were memories the digital data of voltage that calculated for 3-phase after then converts digital data to analog voltage by DAC, finally adjusted AC level equal to 2Vp by OPAmp circuit. In the experiment achieve the sinusoidal waveform that adjusted frequency from 25Hz – 55Hz and had low total harmonic distortion (THD) equal to 0.7%. This process can apply to be a signal generator for 3-phase motor driver.

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Chofabandit, P., & Wangsilabat, B. (2023). Three Phase Sinusoidal Waveform Generator using Microcontroller. Journal of Advanced Development in Engineering and Science, 2(3), 80–85. Retrieved from
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