In this paper, the effectiveness of applying an extra time delay to the data transmitted over redundant channels to cope with harsh electromagnetic interference is studied. The redundant system is compared with and without extra time delay and compared with a non-redundant system, which is the reference situation. The geometries under study are disturbed by strong incident fields, which represent reverberation room conditions. These conditions refer to the planewave integral representation, where multiple planewaves with random angles, polarisations and phases are combined and normalised, to create a reverberation room like environment. A reciprocity based technique is used to efficiently calculate the induced voltages and the resulting bit error rate for the different situations. Because of the properties of the geometries that are under test and the introduction of a time-delay in the transmitted datastream, the moment the induced voltage due to EMI is sampled is different, which causes an EMI-diverse system. The results show that using time-diverse signals optimized for the main disturbance frequency to be expected, is a very effective way of creating EMI-diverse behaviour. In a majority voting (2oo3) system it is possible to eliminate all triple occuring faults. Even for higher field strengths and different EMI frequencies, the time diversity method performs well (better than other EMI-diverse techniques).

Modern safety-critical systems rely heavily on robust communication channels. Even though these communication channels can be protected by Error Detection and Correction Codes, vulnerabilities caused by False Negatives still exist. These False Negatives can be caused by harsh electromagnetic disruptions and are detriment to overall safety. This paper considers the construction and structure of Triplication-based Error Correction Codes to find the most EMI-resilient code. Each code is tested and simulated in terms of the occurrence rate of False Negatives under single-frequency disturbances. It is found that a code with inversion is significantly more robust to these disturbances. Furthermore, a systematic fault injection is also performed to search for vulnerabilities within the code itself. The systematic approach allows us to reverse-engineer the expected vulnerabilities to real-world disturbances.

Transient analysis of electrical machines with mixed eccentricity requires dedicated, fast and accurate solvers. This paper proposes an improved air gap permeance expression which (i) is physically interpretable and (ii) can be easily derived based on the rotor position. This expression is very suitable for inclusion in a solver based on the magnetic equivalent circuit (MEC) method. This allows to e.g. calculate the torque and forces when vibrations act on the rotor. The results of the MEC solver agree very well with those obtained with a FEM solver, but are obtained with a fraction of the simulation time of the FEM solver.

This paper studies the effectiveness of inversion diversity to cope with EM disturbances caused by strong incident fields under reverberation room conditions. Here, reverberation room conditions refers to the situation where multiple plane waves are incident onto the system-under-study, each with a random angle-of-incidence, polarization and phase. Two different geometries are compared: a non-redundant system comprising a single trace on a PCB and a redundant system comprising two parallel traces on a single PCB. A reciprocity-based technique is used to efficiently calculate the induced voltages and the resulting bit error probability in the different geometries. It is shown that with increasing distance between the two traces, the probability on false positive (i.e. two identical, but incorrect bits at the comparator) increases.

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