Can PSIM simulate digital control scheme?

Yes. The Digital Control Module in PSIM provides a number of function blocks, such as zero-order hold, unit delay, z-domain transfer function blocks, digital FIR and IIR filters, circular buffer, quantization block, and other blocks, which can be used to implement a digital control scheme. It can, for example, study the effect of different sampling rates, investigate the quantization effect of the A/D conversion with different number of bits, and evaluate the performance of a digital filter.

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