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5.2 AC Analysis
The frequency response of a circuit or a control loop can be obtained with the ac analysis. A key feature of the
ac analysis in PSIM is that, a circuit can be in its original switchmode form, and no average model is required.
Nevertheless, with the average model, the time it takes to perform the ac analysis will be shorter.
The following are the steps to set up the ac analysis:
- Identify a sinusoidal voltage source as the excitation source for the ac sweep.
- Place ac sweep probes at the desired output location. To measure the loop response of a closed control
loop, use the node-to-node probe.
- Place the AC Sweep block on the schematic, and define the parameters of the ac sweep.
- Run the simulation.