| 摘要 |
<P>PROBLEM TO BE SOLVED: To change over power source supply channels to a control circuit or the like in accordance with circumstances. <P>SOLUTION: The system is provided with a stack 5 generating power with reaction between hydrogen gas and oxidant gas, a control means 4 for controlling a series of operations of start-up, power generation, and stop, an actuator 9 such as a valve and a heater, an AC/DC converter 11 feeding power to the control means 4 or the like, a DC/DC converter feeding power to the control means 4 or the like, and a commercial power source connection switching means 14 making an on/off operation of inputs of the AC/DC converter 11. The commercial power source connection switching means 14 cuts off connection of an input part of the AC/DC converter 11 with the commercial power source 21 at an elapse of given time after the stack 5 reaches a power generation state, when the stack 5 turns into a power generation state from non-power generation state, so that, by changing over feeding sources of such a power source as the control circuit and the actuator 9 from the power generation time to the non-power generation time, power generation efficiency is improved and stability of the system operation can be maintained. <P>COPYRIGHT: (C)2008,JPO&INPIT |
