Design and control of an ultra high speed turbo compressor for the Air Management of fuel cell systems

Compressor is a crucial component of the Air Management System (AMS) used in fuel cell systems. The adoption of a turbo compressor can dramatically reduce the size of the AMS, which is a basic requirement for transportation applications. In this paper, the ultra high speed technology is employed in the compressor design, which results in ultracompact size and high efficiency. One of the main disadvantages of the turbo compressor application is the difficulty of pressure control due to the strong coupling between mass flow and pressure. A decoupling control strategy is developed so as to control the mass flow and pressure properly. The simulation results show that the mass flow and pressure can be controlled separately using two PI controllers after preliminary.