| Abstract |
This paper presents the design and analysis of a high-speed induction machine with a die cast copper squirrel cage used as traction drive in an electrical vehicle. Herby the drive performance of the machine in combination with a three gear shift gearbox is described. Great attention is paid to the mechanical design and the necessary simulations to ensure save operation of the machine at maximum speed of 30,000 rpm. With help of a Finite Element Analysis an overspeed test and operation at different thermal conditions are investigated. The maximum allowable operation speed of the die cast copper rotor is determined and an end cap is presented, that enables to reach the required 30,000 rpm operation speed. Additionally, the presented end cap allows to balance the rotor without influence on the active parts. Other critical aspects, as balancing and the behaviour of the shaft-hub joint at high-speed operation, are also investigated. |
