Abstract:

The aircraft high voltage DC (HVDC) power supply system having a starter/generator double function is getting a lot of attention recently. The cage type induction machine has more advantages such as simplicity, robustness, low cost and easy maintenance. The modern developed power electronic technology makes the cage type induction generator (CIG) suitable to be used in aircraft HVDC power systems. This paper presents a configuration of the HVDC generation system, which is composed of a CIG and a 3 phase power electronic converter, and makes researches on its control technology. Because the electromagnetic torque is a key physical parameter in the process of converting the mechanical energy into electrical energy in a generator, the direct torque control (DTC) strategy can be applied to the proposed system and makes it have fast dynamic performance. The principle of the DTC strategy for the proposed system is introduced. The elementary simulation and experiment results of this system are also presented.

Key words: induction generator, DTC control strategy, air craft, high voltage DC power