| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell system in which reduction of cost can be realized by decreasing the maximum voltage in fluctuating power consumption of auxiliary machineries and by reducing a voltage-withstanding nature of a variety of parts. <P>SOLUTION: Upon the start-up of the fuel cell system, a relay 24a to connect or cut off a fuel cell stack 1 and a driving motor 21 is cut off under the control of a controller 11, and the auxiliary machineries 22 are actuated by setting a directive voltage to a DC/DC converter 27 for high voltage to control a direct current voltage between the fuel cell stack 1 and the driving motor 21 to be of a smaller value than an open voltage of the fuel cell stack 1, and after the directive voltage to the DC/DC converter 27 for high voltage is controlled to be in the vicinity of the open voltage of the fuel cell stack 1, the relay 24a is connected. By this, the fuel cell system can set the instruction voltage to the DC/DC converter 27 for high voltage low at the start-up, and as a result, reduction of cost can be realized by decreasing the voltage-withstanding nature of the variety of parts. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
