Can PSIM read SPICE files or import SPICE models, or vice versa?

No. Even though PSIM netlist files are similar to SPICE netlist, the way that a circuit is set up is different. For example, only logic signal (0 or 1) is needed to drive a switch in PSIM.

In SPICE, however, the gating signal must be sufficiently large to turn the switch fully on. More.

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