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An inverter is needed when an electric load requires an AC power supply while the available one is a DC power supply. The quality of an inverter, one of which is determined by, among others, by the output waveform, whether a square wave, modified sinuses or pure sinuses. Among the three, pure sine inverters require more complicated conversion stages. One technique is bipolar Sinusoidal Pulse Width Modulation (SPWM). In this simulation, an low cost analog trigger signal is generated for the semiconductor switching process using a signal carrier with a frequency of 800 Hz which is adjusted to the HF Transformer. Furthermore, the modulation results are filtered with a Low Pass LC filter to produce a sine waveform output at 220 Volt and 50 Hz. Keywords—Inverter, Sinusoidal Pulse Width Modulation, Analog Circuit

Sine Wave Inverter Bipolar SPWM using Analog Triggering Circuit