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- W2187304294 abstract "Efficient variable-frequency control ofthecentrifugal pumpdrive motorispreferable tofluid control byathrottling valve or abypass valve inmanyapplications. Theproperties ofthecentrifugal pumpasamotorloadarediscussed andtheimplications forthedrive design. Alsodiscussed areotherproperties ofthemotordrive ina pumping system suchasstartup behavior, response topumpoverload, andlossofpriming fluid aswellasitscharacteristics asacontrol systemelement. Sincefansandcentrifugal blowers aresimilar in operation tocentrifugal pumps,muchofthisdiscussion isalsoappli- cable tothem.Theaimistogivethespecifier ofpumpingsystem components asetofcriteria withwhichtojudgethesuitability ofa given motordrive algorithm forhispumpingapplication. CENTRIFUGAL PUMPCHARACTERISTICS: TO DISCUSStheoperation ofapumpdrive system, itis necessary todiscuss theproperties ofthecentrifugal pump anddefine someterms. Centrifugal pumpsuseasetofimpeller vanes rotating within avolute shaped casing toimpart energy toliquids. Theprincipal parts ofthecentrifugal pumpinits simplest formareshowninFig. 1. Liquid isforced byatmospheric orsomeother formof pressure intothecenter oftheimpeller. Fromthere itisaccel- erated bytherotation oftheimpeller vanes around andout- wardbycentrifugal force intotheexpanding volute. Theex- pansion converts thefluid velocity energy into pressure energy atthedischarge. Since themassofthefluid itself creates thepressure inthe pumpbycentrifugal force, thepressure isproportional tothe fluid density (mass perunitvolume). Theexpression forcen- trifugal force is Mv2 F= ( 1 ) r where" @default.
- W2187304294 created "2016-06-24" @default.
- W2187304294 creator A5078670795 @default.
- W2187304294 date "1984-01-01" @default.
- W2187304294 modified "2023-09-26" @default.
- W2187304294 title "Optimal Characteristics ofa Variable-Frequen cy Centrifugal PumpMotorDrive" @default.
- W2187304294 cites W3101292012 @default.
- W2187304294 cites W3192453824 @default.
- W2187304294 hasPublicationYear "1984" @default.
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