Investigation of a high-speed drive for turbo-machines

Abstract:
The necessary volume of rotating electrical machines primarily depends on the required torque. Therefore, the achievable engine speed determines the resulting power density. In general, the motor power increases proportionally with the rotational speed. The power of compressors and turbines even rises with the speed cubed. For this reason, the paper deals with the development of a high-speed drive for turbo-machines. The investigated system will be used to charge combustion engines. As a result of the high rotational speed, extensive mechanical and thermal requirements must be taken into account in addition to the electromagnetic design. For this purpose, analytical and numerical calculation models are used. A prototype motor allows the verification of assumptions with measurements. In addition, the development of a suitable electronics is discussed. The high-speed drive presents a basis for the improvement of the calculation methods and the investigation of material properties. Furthermore, aspects of power electronics and control strategies can be tested in practice.