Patent ID: 9115722
Filing Date: 2015-08-25
Classification: F04B,F04D

Abstract:
1. A water feed pump control device that carries out an estimated constant end pressure control by controlling the operating speed of a feed water pump installed in a feed water pipe with an inverter device, the feed water pump control device comprising: a first storage device that stores linearized characteristics showing the relationship between the output frequency of the inverter device and a discharge side pressure; a pressure sensor that detects the discharge side pressure of the feed water pump; a power consumption calculation device that calculates the power consumption of the inverter device; a second storage device that stores F-P characteristics showing the relationship between the output frequency of the inverter device and the power consumption; a determination device that determines the presence or absence of a boost pressure of the feed water pump based on the inverter device output frequency, power consumption, and F-P characteristics; and a correction device that corrects the linearized characteristics when it is determined by the determination device that there is boost pressure.