| Abstract |
An autonomous hybrid vehicle is characterized by a conventional drive with combustion engine, an additional
electric drive and an intelligent drive control. The electric drive has to combine high efficiency and low weight. In this paper, different possibilities for suitable transducers are presented. The machine types being investigated are asynchronous and permanent magnet excited synchronous machines. 1Th first attempt was to use conventional electromechanical transducers. Because of their low torque density, a gear was used to achieve the dcntanded power. The results won by calculation
and measurements show that conventional machines cannot be used because of their high losses leading to overheating. Efforts to lower the losses and improve the cooling provided machines being proper solutions to the problem. Finally, it was tested whether it is possible to dispense with the gear. On the one hand tbe losses in the gear and its weight can be avoided this way; on the other hand, the transducers weight increases due to the lower spoed and the design has to comply with very unusual spatial conditions. The calculations and ftrst measurements revealed that, for some special machine types, considerable
improvements are possible. |
