Design of a 1000 W Boost Inverter Using The Sine Pulse Wave Modulation (SPWM) Method

An inverter is a device that converts DC power into AC power and is used to provide an alternative power source from batteries or accumulators when the main power source, such as the grid, is interrupted. There are two types of inverters, low frequency (LF) and high frequency (HF), each with advantages and disadvantages. LF inverters often experience decreased performance and power losses that cause voltage drops, so it is necessary to develop HF inverters for better efficiency. In this research, an HF inverter that produces pure sine waves and a stable voltage of 230 VAC, similar to the PLN voltage, is developed. The inverter is designed with two parts. First, a circuit to increase the voltage from 12 VDC to 380 VDC using a push-pull topology with a frequency of 50 kHz. Second, this circuit is then processed using the Sine Pulse Wave Modulation (SPWM) method to produce a pure sine wave after passing through the filter. The test results show that this inverter works well at a maximum load of 600W, the output voltage reaches 194V at an output current of 2.4A, while the input current is 54.18A. The efficiency of the inverter reaches 82%, with the wave produced being pure sine at a frequency of 50Hz.