DC/DC DC/DC POWER CONVERTER CONTROL STRATEGY FOR SOURCE PROTECTION

摘要

The controller 11a of the DC / DC converter 10a responsive to the power output of the fuel cell power plant 13 determines whether the fuel cell voltage exceeds the limit, and if it exceeds the fuel cell output current or the DC / DC converter output If all of the current is not excessive, it operates under a control strategy that causes an increase in the DC / DC converter duty cycle thereby increasing the power required from the fuel cell stack. This eliminates the need for conventional voltage limiting to protect the fuel cell from corrosion. Digital control loops and state machines are illustrated.