CENTRIFUGAL PUMP CONTROL SYSTEM Russian patent published in 2014 - IPC F04D15/00 F04D13/06 

FIELD: engines and pumps.

SUBSTANCE: invention relates to control systems of centrifugal pump units and can be used at liquid pumping. The centrifugal pump control system includes control parameter setting unit (1), the outlet of which is connected to the first inlet of comparison unit (2). The comparison unit outlet is connected to a calculation unit of required speed (3). The outlet of the calculation unit of required speed (3) is connected to frequency and voltage control unit (4). Outlets of frequency and voltage control unit (4) are connected to inlets of frequency converter (5). Outlet of frequency converter (5) is connected to asynchronous electric motor (6) inlet. Outlet of asynchronous electric motor (6) is connected to centrifugal pump (7) inlet. The first outlet of centrifugal pump (7) is connected to the inlet of adjustable parameter sensor (8), and the second outlet is connected to flow transmitter (9) inlet. Outlet of flow transmitter (9) is connected to the second inlet of adjustable parameter calculation unit (10). Adjustable parameter sensor (8) outlet is connected to the first inlet of adjustable parameter calculation unit (10). Outlet of adjustable parameter calculation unit (10) is connected to the second inlet of comparison unit (2).

EFFECT: improving energy efficiency of centrifugal pump plants with frequency rpm control owing to considering hydraulic characteristics of the main line and the pump and minimising powder losses in a centrifugal pump - asynchronous motor power channel.

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