When a transmission engineer first runs a new EV drivetrain on a test bench designed for ICE components, something unexpected often happens: the data looks clean, but the drivetrain sounds wrong.
Not broken – just wrong. A faint, high-pitched whine at 3,200 rpm. A harmonic that wasn’t in the simulation. A bearing signature buried under motor noise that the instrumentation wasn’t configured to isolate.
The issue is usually not a bad design. The real problem is that the testing approach was built for a different kind of drivetrain. [Read more…] about Why Electric Vehicle NVH Testing Demands a Different Approach than ICE Validation