How are the devices modelled in PSIM?
Models in PSIM are mainly in behavior or ideal nature. For example, a comparator output is one when the positive input is greater than the negative input. Otherwise it’s 0. No power supply is needed and there is no slew rate limitation. Another example is switch devices. A switch is modelled as a very small resistor when on and a very large resistor when off. Switch turn-on/turn-off transients are not considered. Also, switch conduction voltage drop and on-resistance are not included. This type of models is ideally suited for system-level simulation. One can, nevertheless, build a more complex and realistic model based on the basic model. For example, an external dc voltage source and resistor can be connected in series with a switch to model the conduction voltage drop and on-resistance.
