The University of Queensland’s Solar Racing Team has performed quite well in competition in the past, using relatively inefficient and unreliable electrical systems.  This thesis focussed on the optimisation of two of the systems in the car – the sensors and associated signal conditioning and the power supply. For signal conditioning, the system created measures all the required parameters around the vehicle, including voltages, currents, temperatures and speeds. It does so, with an accuracy of better than 1% while also maintaining a very high reliability. The power supply unit created powers all the electronics of the car, by stepping down the main battery voltage of 120V. Its maximum load rating is 10W. The unit achieved a top efficiency of 89% at maximum load, with an efficiency above 80% over its most used range, by implementing synchronous rectification and a variable frequency scheme. With enhancements, it is envisioned that the efficiency could well exceed 90%.

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Copyright (C) 2007 Alain Georgette / Copyright (C) 2006 Frantisek Hliva. All rights reserved.