| 摘要 |
PURPOSE: To eliminate discharge to the atmosphere of air compressed with an air blower to prevent the loss of power, omit the installation of an air discharge pipe and an air blower pressure control valve, and simplify a controller. CONSTITUTION: In the starting of a fuel cell, when a differential pressure signal 65 of inlet pressure in an air blower 34 and output pressure is larger than a differential pressure setting signal 69 from a signal generator 70, the number of revolution of the air blower 34 is decreased by a control signal 72a outputted from a PI controller 67 so that a differential pressure excess signal 78 becomes zero to prevent the overload of the air blower 34. After a turbine compressor moved to self-operation, an instruction signal 55 based on an output signal 53 is subtracted from a total air flow rate signal 52 with a subtracter 56, and a switch 73 is switched so that the number of revolution of the air blower 34 is controlled by a control signal 72b outputted from the PI controller 58 so as to make a differential signal 57 subtracted with the subtracter 56 zero. |
