A Case Study for the EMC Co-Simulation of Injection Path Model Using WR Method

This article highlights an assessment of the co-simulation suitability to evaluate the conducted electromagnetic immunity of an injection path model between two source circuits using waveform relaxation (WR). The latter enhances co-simulation performance and stability by adjusting the impedance approximation parameter variables with the voltage and current control sources. Additionally, this paper emphasizes the significance of parameter initialization to interface for the defined subsystems and ensures compatibility with the overall system. Testing is conducted on an injection path model circuit with an input pulse voltage source from 0 to 2.5 V. A comparative analysis with the WR method indicates output voltage difference of less than 1.4% between the full system values after three iterations only. These results highlight the proposed method’s ability to achieve faster and more accurate convergence compared to the traditional WR methods.