| 摘要 |
PURPOSE:To make the output horsepower of a motor usable up to the maximum, by setting an optional variable pump among the rest on a condensing table driving by one motor, and according to its output horsepower, controlling the output horsepower of the rest. CONSTITUTION:In two variable pumps 3 and 4 driven by one motor 1, when one side one 3 is set to being a reference pump, a command pressure Pi is calculated according to a discharge pressure Pa and a discharge flow rate Qa of this reference pump 3, while the command pressure Pi is led into a command circuit 13, causing a regulator 11 to come into operation and a dischage flow rate Qb of the variable pump 4 to be controlled, whereby the output horsepower Cb of the variable pump 4 is controlled on the basis of the output horsepower Ca of the reference pump 3, and the sum total of these output horsepower values Ca and Cb of both pumps 3 and 4 is controlled so as to be correspond to the output horsepower C0 of the rotor 1. With this method, the output horsepower of the motor 1 can be used up to the maximum at all times. |
