IEEE Fellow Frank Leferink has been with THALES in the Netherlands since 1984, where he is Director EMC and responsible for the EMC activities for radar systems and naval platforms.
He is also manager of the Network of Excellence for EMC of the THALES group.
THALES is sponsoring his part-time, full-research, professor position at the University of Twente, where Frank is holding the Chair for EMC. Fourteen PhD researchers, three assistant-professors and four post-docs are currently active in the EMC group.
Frank is Vice-President Conferences of the IEEE EMC Society and associate editor of the IEEE Transactions on EMC and the IEEE Letters on EMC Practice and Applications.
Abstract title: EMC, an important issue
Abstract: In 2018, an electrically powered transport vehicle for children, the Stint, crashed at a railway level crossing. Four children died in the accident. The driver and another child were seriously injured. The Netherlands Forensic Institute concluded that the cause of the accident was either driver error or an EMC problem.
We conducted extensive research on the Stint on behalf of the Public Prosecution Service, but were never able to publish our findings due to the ongoing criminal investigation.
Our verdict: the Stints do not meet the essential requirements of the EMC Directive (the vehicle was exempt from the Automotive Directive, thus the EMC Directive is applicable). This is because the manufacturer did not perform a (mandatory) risk analysis and did not apply any of the interference suppression measures recommended by the manufacturer of the control computer. These measures include a shielded cable, a shielded housing, cable separation, filtering, and redundant speed control. None of these measures were applied. Actually, they did not even perform any analysis, nor any test. None.
Analyses revealed that there were interference-sensitive parts. With direct injection, the vehicle proved to be highly susceptible to interference. Subsequently, measurements were repeated in an anechoic chamber and a reverberation chamber. During our research, the wheels of the Stint accelerated, and sometimes suddenly rotated backwards (up to maximum speed) and then forwards again, without the direction switch or speed control being operated.
In this presentation, I will explain what was done during the research and what lessons we, as EMC specialists, should draw.