| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1282242 | International Journal of Hydrogen Energy | 2012 | 8 Pages |
In this paper a simple model for evaluating current ripple effects on commercial PEM fuel cells is presented. The model is formulated starting from the Randles equivalent circuit and extending it assuming a dielectric relaxation of the material to represent dynamic processes in the frequency range typical of inverter current ripple. The proposed equivalent circuit is experimentally validated on a 14 kW commercial Morphic PEM fuel cell at the frequencies of interest. Finally the effects of current ripple on losses and fuel cell efficiency are discussed.
► Effects of current ripple on PEM fuel cells are investigated. ► The considered ripple is in the typical frequency range of power converters (inverters). ► Analytical model and impedance spectroscopy measurements are presented. ► A frequency-dependent-capacitance model is formulated. ► Higher frequencies produce lower additional losses due to ripple.
