by electricron
hxa wrote: ↑Sun Nov 07, 2021 7:52 am Just found an FRA report on the exact same issue:Interesting, but proprietary testing and design by Siemens, not Alstom. Maybe Amtrak should have bought Siemens HSR trainsets so as to not have to redesign the circuitry over again. But now Alstom must do it again, or pay Siemens a small fortune to license it.
https://railroads.dot.gov/sites/fra.dot ... INTERC.PDF
Apparantly Siemens's ICE trainset was successfully tested for EMI on the corridor. The test covered scenarios from max traction to max braking and from zero to line speeds, with a specific focus on cab signal interference. Siemens did reduce the 100 Hz harmonics by an active filter in addition to a vital protection circuit which would fail-safely cut off the MCB once 100 Hz current went above 1 amp. Theoretically Alstom could take similar or better approaches to this problem.
Is asking General Motor by Ford or vice versa to use their copyrighted designs common? No, I did not think so. Never-the-less, we know there is an engineering solution that could solve this problem. Will Alstom be able to figure it out on their own?