Abstract: Starter/generator aero power system which is composed of induction machine and power electronic converter is significant. In this paper,the conversion from starting mode to generating mode of the induction starter/generator system is researched. The system has a feature that stator flux linkage rotate speed can be fast controlled by the converter. By means of this feature, the direction of electromagnetic torque can be changed, and the system can convert from starting mode to generating mode.The conversion scheme is introduced in detail. Using the conversion scheme, the system can convert from starting mode to generating mode smoothly, and after turning into generating mode, DC link voltage increases from low voltage of starting power supply to the voltage needed by the system, finally the system can generate stably. Simulation and experimental results are also presented.

Key words: aero power, induction machine, starter/generator, conversion