Electrification Meets Electromagnetics

As electric vehicles (EV) push toward higher voltages, faster switching and increasingly compact packaging, electromagnetic compatibility (EMC) has become one of the most expensive risks in the development timeline. A failure caught during compliance testing — or worse, after launch — can trigger redesigns, retesting against standards like CISPR 25 and ICNIRP, and delays that push programs back by months.

Meanwhile, EV powertrains pack high currents and fast switching into tighter spaces than ever, leaving less room for shielding and physical separation between noise-sensitive and noise-generating components. A subsystem that passes bench testing in isolation can still fail once it's integrated into the full vehicle — and by then, fixes are costly.

Simulation lets engineering teams find these problems on screen, long before a physical prototype exists. By combining circuit-level and electromagnetic (EM) simulation, built around a source–coupling path–sink methodology, teams can match the right approach to each problem.

Instead of discovering interference issues during compliance testing, teams can:

• Catch problems earlier in the design cycle, when changes are cheap and layouts are still flexible
• Evaluate the full vehicle architecture, not just isolated components, revealing coupling paths and resonances that bench-level testing can't expose
• Reduce reliance on physical prototypes, cutting both development cost and schedule risk
• Turn EMC from a late-stage compliance checkbox into a continuous design check that runs throughout the program

This white paper covers the modeling methodology in detail and then applies it across a series of simulation studies that address both component-level and system-level EMC behavior in EV powertrains.

​​​​​​​If your team is deciding where EMC simulation fits into your development timeline, this white paper is the ideal starting point.