The AC to DC booster circuit was tested at full-load. The circuit was tested using a 120 Vrms input voltage and 210 VDC output voltage. Unfortunately we encountered some bugs in our design and are not able to operate at a full 220 VDC output voltage for a given 85 - 135 Vrms input voltage.

The graph below shows the Output Voltage (VDC) vs Input Voltage (Vrms) for the designed inout voltage range (85 - 1435 Vrms). As you can see from he graph, the voltage is well regulated once input voltage is above 85 Vrms. All the measurements were taken at full voltage (ie: 360 Ω, ~0.5 A, 220 V, ~125 W).

The graph below is a printout from the oscilloscope showing input voltage and current waveforms after the rectifier. The phase is identical on both graphs which is part of the power factor correction, the top waveform has a dead spot, which means that we do not have full power factor correction.

The graph below are the results showing zero voltage transition switching. The two lines on the graph show that the switching of the main transitor takes place when the voltage across the device is approximately zero volts. The switching technique seen here reduces the losses greatly.

The graph below shows the gating signals for both the main switching transitor and the zero voltage switching transitor. The bottom (ZVT) signal is a short pulse before the main pulse which initiates the process to have zero voltage across the main transitor when it switches.

A special thanks goes out to Deepak Gautam, Master's student at UVIC, for aiding us to get the prototype AC to DC circuit to the stage it is at today.