PSU Designer II

PSU Designer II is a program for the design and analysis of unstabilized sources consisting of a transformer, rectifier, filter and load. It was written and compiled by Duncan Munro of Duncan Amplification. It is distributed as a fully functional version. Requires W95 + and matching computer with mouse, or other pointing device.

Resource optimization and calculation with PSU Designer II

If anyone thinks, Making a good resource is a breeze, then he probably didn't do any yet. Losses, voltage drops, ripple, overheating, output voltage drop… PSU Designer II will provide help in optimizing the resource.

Installing PSU Designer II

The installation of the program is trouble-free, in addition to the standard questions whether you agree with the conditions of use of the program and the directory where you want to install it, you must select the required accuracy and frequency. These parameters can also be changed in the program.

Working in PSU Designer II

The program window can be divided into three parts: wiring diagram, results of calculations and graph. If we move the cursor over the parts in the diagram, immediately the background below them changes from white to yellow. Right-click to display the text “Edit” or “Change” (it depends on whether you click on the part or outside).

If we choose “Edit”, we have the ability to change the values ​​of a given component. For example, in a transformer, it is the output voltage and winding resistance, for the diode, select its type, in the case of a filter, the values ​​of the components of which it is composed and, in the case of a load, its size.

If we choose “Change”, we have the ability to change the connection. The rectifier can be one- and two-way, bridged or connected as a voltage doubler with semiconductor or vacuum diodes. The transformer automatically adapts to the selected type of rectifier. The filter can be C, LC, RC or battery. The filters can be connected behind each other. There are two types of loads, namely resistive and current, for which we can define the change of the current taken after a certain time.

Before clicking the button “Simulate” we have the possibility to set the length of the simulation and its delayed start after switching on. With a delayed start, we no longer see transients, which arise when charging capacitors, etc..

Results of source calculations

The results of the calculations consist of all currents and voltages in the circuit. Minimal is displayed, maximum value and their difference, average and effective value. Currents and voltages can be displayed in a graph as follows, that we check the box next to the currents and voltages, whose course we are interested in.

This program helped me a lot in designing a new 13.8V / 6A power supply (TCVR a notebook) a 28V/9A (100W V-MOS PA). But about that next time.

Download PSU Designer II

PSU Designer II can be found in the DOWNLOAD section.