| 摘要 |
PURPOSE:To decrease electric power consumption by installing an inverter used only for a blower in a power supply circuit of a blower motor and controlling the number of revolutions of the blower motor by varying an output frequency of the inverter by an output signal of a detector which detects load current of a cell. CONSTITUTION:Power of a blower 1 is supplied from an inverter 10, which is used only for the blower 1, connecting to d.c. output terminal 9 of a cell. A load current detector 11 is arranged in a power supply circuit to a main inverter 6 from the cell. When an output signal 12 is introduced to a controller of the inverter 10, an output frequency of the inverter 10 is controlled in proportion to the output signal. Power having frequency proportion to cell output is supplied to a blower motor. The number of revolutions of the blower motor valies in proportion to the cell output, and the amount of supply air is automatically adjusted by the blower. When the cell is operated in low loads, the frequency of the inverter 10 for the blower is decreased, and the blower is drived at a low speed. Therefore, power consumption is descreased. |
