电机学英文文献翻译Thethree-phaseinductionmotorspeedcontrolmethodThree-phaseasynchronousmotorspeedformula:N=60f/p(1-s)Canbeseenfromtheaboveformula,changethepowersupplyfrequencyf,,,chopperspeedcontrol,cascadecontrol,icslipclutch,fluidcouplings,-,withhighspeedmethodandinefficientmethodsoftwokindsofspeed:highspeedwhentheslipreferstothesame,sonosliplosses,suchasmulti-speedmotors,Slipfrequencycontrolandlosscanspeedrecoverymethods(suchascascadecontrol,etc.).Adeterioratinglossofspeedcontrolmethodsareinefficientspeed,suchasseriesresistanceoftherotorspeedmethod,theenergylossintherotorcircuiton;lutchThespeedmethod,theenergylossintheclutchcoils;fluidcouplingspeed,,ifnotspeedrange,,variablespeedcontrolmethodofpolepairsThisspeedisthenusedtochangethestatorwindingwaytochangetheredcagemotorstatorpolepairstoachievespeedcontrolpurposes,thefollowingfeaturesWithhardmechanicalproperties,goodstability;Nosliploss,highefficiency;Wiringsimple,easytocontrol,lowprice;Alevelspeed,differentiallarge,cannotgetsmoothspeedcontrol;Withpressureandspeedadjustment,icslipclutch,,suchasmetalcuttingmachineBed,Lift,Liftingequipment,,FrequencyControlMethodFrequencycontrolistochangethemotorstatorPowersupplyFrequency,thuschangingthespeedofitssynchronousspee
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