Design and Implementation for Performance Evaluation of a Compensated PWM Inverter

This investigation focuses on examining the impact of capacitor current feedback and compensators on the performance of a <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$1\psi$</tex> Sinusoidal Pulse Width Modulation (SPWM) inverter with an inductor and capacitive filter. The control design is carried out using MATLAB. The control unit of PWM comprises two loops. The capacitor current feedback is used to decrease the Total Harmonic Distortion (THD) of the load voltage and increase the speed of the response. To evaluate the effectiveness of the designed compensators, a simulation & implementation of the inverter are conducted, targeting an o/p power of 700 W at 230 V. Based on the simulation results, it is observed that, the system exhibits a satisfactory transient response, characterized by an infinite gain margin, and a low THD of 0.5 % for non-linear loads. The experimental verification of the proposed control technique for non-linear load conditions produces a seamless sinusoidal output.