| 摘要 |
<p>PURPOSE:To improve the effect of fuel cost saving and energy saving, by controlling the frequency of the AC output of an inverter to be low, when a difference between the power of a shaft generator which can be generated, and feed power fed to a load comes to a specified value or less. CONSTITUTION:A generator 1 is composed of a main machine 2 driving a propeller 3, and a shaft generator 4 connected to the main machine 2. The output of the shaft generator 4 is applied to a controller 6 consisting of inverters. Output from the terminal p2 of the controller 6 is applied to a switchboard 8. By a measuring device 7, feed power p1 fed to a load is measured. By a measuring device 5, the power FG of the shaft generator 4 which can be generated is measured. By a comparator 12, feed power PL is subtracted from power PG which can be generated, and when the subtracted value comes to a previously set threshold value or less, then the output of change-over signal 12a is generated, and the frequency of the AC output of the inverters is lowered.</p> |
