Design and Implementation of a DC to AC Power Electronics-Based Inverter that Produces Pure Sine Wave Output for Critical Engineering Applications
Power inverters play a crucial role in the field of engineering,particularly in applications where power stability is imperative. In devicessuch as Uninterruptible Power Supplies (UPS), the conversion of raw powerto DC, subsequent filtering, and inversion to AC are executed through puresine wave inverters. These inverters exhibit remarkable stability, makingthem ideal for powering sensitive equipment like data switches and RemoteTerminal Units (RTUs). This study delves into the intricate process ofconverting DC power into a pristine sine wave signal. The heart of thispower conversion lies in the utilization of the KA3525A integrated circuit(IC) in conjunction with MOSFETs of the PN55 series, supported bycapacitors and resistors for effective power filtration. The KA3525A, amonolithic IC, encompasses all essential control circuits for a pulse widthmodulating regulator. Within this IC, a voltage reference, error amplifier,pulse width modulator, oscillator, under-voltage lockout, soft start circuit,and output driver collaborate seamlessly. The MOSFETs function asswitches, synchronized with the oscillating signal from the KA3525A IC.This coordination, combined with the filter and other signal conditioningunits, enables the conversion process. The design achieves the conversion ofraw power into a stable pure sine wave signal of 170V AC at the H-bridgeterminals, demonstrating the success of the designed approach