Anjali Menon, R.Madhumitha
This paper presents the designing of a low powered (25-30 watts), portable and cost effective solar micro-inverter wherein the single solar panel is able to run the AC loads along with DC loads. The system consists of a solar panel, DC-DC push-pull converter, DC-AC inverter, LC filter and the test loads. The solar cell powers DC-DC push pull converter which boosts the input DC voltage into the desired rated input voltage of the inverter. The ripple is reduced by using a pi filter between the converter and inverter circuits. High frequency Pulse Width Modulated (PWM) pulses are generated by a microcontroller (PIC) and provided to the switches of half bridge inverter. The 220V PWM sine wave output of the inverter is conditioned to pure sine wave by an L-C filter. The performance of closed loop system is also evaluated.
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