With NI Multisim and NI LabVIEW software, you can deploy desktop simulation of your entire analog and digital system before prototyping. This tutorial shows you how to use the Multisim and LabVIEW cosimulation function to achieve closed-loop simulation of transistor-level power electronics as well as to implement FPGA-based digital logic used for control.
We also examine the simulation of the system of a three-phase inverter. Because the high-power analog circuit is developed at Multisim, it benefits from the new SPICE-based power electronics models included in Multisim 12.0, such as MOSFET switches and non-linear RLCs. The digital logic blocks that control the Multisim design are developed in LabVIEW.
Simultaneous point-to-point simulation is performed, including all system dynamics between the analog circuit and FPGA-based digital control system. During this process, processing resources are negotiated between both simulation engines in a variable time-step manner. It is now possible to simulate accurate and complete desktop systems at an early stage of the design process.