Analysis of Optimal Oxygen Excess Ratio and Nonlinear Tracking Control of Vehicle PEMFC Air Supply System

Figure 9

The influence of different stack humidity on net power and optimal oxygen excess ratio under (a) 120 A, (b) 160 A, (c) 200 A, (d) 240 A, and (e) 280 A load current conditions.

(a)

(b)

(c)

(d)

(e)