Recently

proton exchange membrane fuel cell(PEMFC)as main power source of vehicles is widely concerned. Air compressor is one of important components in a PEMFC system and provides required oxygen and pressure for the cathode in electrochemical reactor of PEMFC. Its working performance has a great influence on the steady and dynamic performance of the fuel cell. Using a 150 kW proton exchange membrane fuel cell system in our laboratory

the working characteristics of its centrifugal air compressor are studied

and an application model for the air supplying system of the fuel cell is established

which involves the centrifugal air compressor. The results of experimental verification indicate that the simulation model can reflect accurately the characteristics of the centrifugal air compressor and the air supplying system. And the model can truly describe the steady control effect of the air system with the centrifugal air compressor in the large power PEMFC as well as the dynamic response of the different control strategies. The model provides theoretical support for the study of the air supply system of high power PEMFC and the corresponding control strategy. The simulation model and experimental results are an important basis and reference for the optimization of the next control strategy.