Abstract. In this contribution, the procedure "Equivalent Cable Bundle Method" is used for the simplification of large cable bundles, and it is extended to the application on differential signal lines. The main focus is on the reduction of twisted-pair cables. Furthermore, the process presented here allows to take into account cables with wires that are situated quite close to each other. The procedure is based on a new approach to calculate the geometry of the simplified cable and uses the fact that the line parameters do not uniquely correspond to a certain geometry. For this reason, an optimization algorithm is applied.

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Abstract. There are many reasons, why electric drive systems will be used in future more frequently in transportation systems. The electrification allows a flexible use of different energy sources and thus creates a greater independence from fossil energy. However, electric drive systems are a challenge for the manufacturers of transportation systems. The electrical powertrain can not only be exposed to interferences, it may also emit interferences into components and communication cables in the vicinity. This can be a high risk for the drive system and for the passengers. For that reason, an EMC study of an electrical powertrain for transportation systems is presented. There the interference at the unshielded high-voltage cable (HV-cable) is characterized. The analysis of the influence of position variation of the communication cable with respect to the unshielded HV-cables is one main aspect. Different optimizations have been added to the test setup.

The change from conventional to electric drives in transportation systems is forced by the shortage of gasoline and the environment protection. Electric drive systems are a challenge for the manufacturers. The electrical powertrain can not only be exposed to interferences, it may also emit interferences into components and communication cables in the vicinity. These can be a high risk for the drive system and for the passengers, when the electric drive is used for human transport. This paper presents an EMC study of an electrical powertrain for transportation systems. A brief summary of the interferences at the unshielded high-voltage cable (HV-cable) is given. The analysis of the influence of position variation of the communication cable to the unshielded HV-cables is studied. Different cheap shielding variants are analysed and compared to full shielded HV-cables. Furthermore, different optimizations have been added to the test setup.

Electric drive systems will play an important role in the development of future automobile architectures. The electrification allows a diversification of energy sources and offers great opportunities for an environmentally friendly expansion in the automotive industry. However, the electric drives are a challenge for the manufacturers. The electrical powertrain can not only be exposed to interferences, it may also emit interferences into components and communication cables in the vicinity. These can be a high risk for the drive system and for the passengers. To study the electrical powertrain more in detail and thus avoid these interferences, simulations are a useful tool. This paper presents different types of simulations of electrical powertrains for transportation systems. As a main aspect, the interference coupling of the High Voltage cables (HV-cables) of the electrical powertrain to nearby communication cables is studied using field simulation based on the method of moments and also network simulation with SPICE. The results obtained through simulations are compared with those from measurements in an anechoic chamber. A brief summary on the measurement setup and the measurement procedure is also given.