Journal
JOURNAL OF PROCESS CONTROL
Volume 17, Issue 4, Pages 333-347Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jprocont.2006.10.004
Keywords
fuel cell; DC/DC converter; electric motor
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A simplified dynamic model for fuel cells is developed, based on the concept of instantaneous characteristic, which is the set of values of current and voltage that a fuel cell can reach instantaneously. This is used to derive a theorem that indicates the conditions under which the power output of fuel cells can, in theory, be perfectly controlled. A fuel cell connected to a DC/DC converter is simulated numerically, with a control system based on switching rules in order to control the converter's output voltage. The resulting transients settle in about 5-10 ms. The converter is then used as an actuator in a cascade control loop to control the torque output of a DC electric motor with a PI controller in the external loop. In this loop, the resulting in transients settle in less than 0.2 s. (c) 2006 Elsevier Ltd. All rights reserved.
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