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Safety is becoming more and more important with the ever increasing level of safety related E/E Systems built into the cars. Increasing functionality of vehicle systems through electrification of power train and autonomous driving leads to complexity in designing system, software and safety architecture. ISO 26262 aims to reduce the complexity and to approve the traceability of the different safety...
The most recent GreenTeam race car, the E0711-7, has been designed and built to set a new level of high performance race cars made by GreenTeam. This paper investigates the E0711-7's high performance powertrain design process, powertrain structure and the unique oil-cooled battery pack. Experimental results from test bench measurements and race data have been reported to illustrate the powertrain...
Due to high range and continious power requirements in electric and hybrid cars the efficiency of electrical machines is one key parameter. In this paper ac copper loss effects, mainly circulating currents, are investigated. A permanent magnet machine used for electric and hybrid cars showing 6 pole pairs, a maximum power of 80kW and a maximum speed of 12000 rpm is used for this analysis. In general...
In power converters of (hybrid) electric vehicles, the power losses within the semiconductors (diodes and IGBTs) lead to strong self-heating. Therefore, methods for online monitoring of the relevant temperatures are a very important topic regarding thermal self-protection. In order to reduce the number of sensors (and costs) it can be advantageous to use fewer sensors than the number of relevant temperatures...
Real-time thermal monitoring of power-semiconductor temperatures is an important task to establish thermal protection within a water-cooled power-electronic inverter unit. A model-based method is presented, which estimates the junction temperatures. Via feedback of measured temperature signals, the observer system is also able to estimate the coolant temperature. However, if the module is cooled by...
This paper presents a novel method to position electric vehicles for inductive charging purposes. The approach is to get position information by measuring the magnetic flux density caused by the charging coil located in the ground of the parking place. However, the sensors are mounted at the high-permeable undersurface of the vehicle, which leads to field distortions and, consequently, to high measurement...
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