3 Phase-controlled DC motor drives
3 Phase-controlled DC motor drives
3 Phase-controlled DC motor drives
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• A control technique to overcome thisnonlinear characteristic is that the controlinput to determine the delay angle ismodified to beα = cosv(V−1 c −1cm) = cos(vcn)where v c is the control input and V cm is themaximum of the absolute value.• Then the dc output voltage is3 3−13 ⎡ 3 Vm⎤V dc = Vmcosα = Vmcos(cos vcn) = [ Vm]vcn= ⎢ vc=π ππV⎥⎣πcn ⎦Krvc