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Power Converter Voltage Stabilizer

This example shows a voltage stabilizer circuit. It uses a full-wave rectifier, a single-wave inverter, and a buck-boost transformer to achieve voltage regulation.

If the load sensor detects a voltage disparity, the feedback controller drives the four-quadrant chopper as a single-phase inverter and generates a voltage equal to the difference between the nominal value and the measured one. This output is either in phase or 180 degrees out of phase with the incoming voltage and is supplied to the primary winding of the transformer. The induced voltage in the secondary winding of the buck-boost transformer is added to the line, supplying the load with a constant voltage.

Model Overview

Simulation Results

The plot below shows the peak values of the input and load voltage. It also shows the voltage induced in the secondary winding of the buck-boost converter.