英语翻译
Inthepumpindustry,muchourworkinvolvestwoextremelysimple,yetefficientmachines‐‐thecentrifugalpumpandtheACinductionmotor.Thecentrifugalpumpconvertsmechanicalenergyintohydraulic(flow,velocity,andpressure)energyandtheACmotorconvertselectricalenergyintomechanicalenergy.Manymediumandlargercentrifugalsofferefficienciesof75–90%andeventhesmalleronesusuallyfallintothe50–70%range.LargeACmotors,ontheotherhand,canapproachanefficiencyof97%andanymotor,fivehpandabove,canbedesignedtobreakthe90%barrier.