This thesis work analyses, models and presents a new frame design for the Csiro electric drive for solar cars. The main objective is to determine whether Csiro motor (CM) is more efficient than the Biel motor (BM). To do that, performance tests were conducted and compared with both drives. Results showed that the CM is more efficient at low torques. The same results were used to derive and validate a steady state model for the CM. The Model is based on four major losses in the CM. Using the model it was possible to determine the areas where improvements were possible to boost the efficiency, to optimize the mechanical design and to calculate the losses and efficiency of the CM when subjected to some certain load.