3 Phase-controlled DC motor drives
3 Phase-controlled DC motor drives
3 Phase-controlled DC motor drives
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• By combining armature and field control, awide range of speed control is possible.• The relationship between armature currentand torqueT e = Kφ f i a• The rated torqueT er = Kφ fr i ar• The normalized versionTenT=Teer=KφKφffriiaarφ= (φffri)(iaar)=φfnian,p.u.(perunit)