3 Phase-controlled DC motor drives
3 Phase-controlled DC motor drives
3 Phase-controlled DC motor drives
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• The source inductance can be introduced toreduce the rate of rise of current in thethyristors.• If the source inductance is L ls , the voltagelost due to it is1 α+µVV V sin( t)d( t)mx = ∫ m ωsωs= [cosα − cos( α + µ )]παπwhere , the overlap conduction period isµ =cos−1[cosα −πωsLVlsmIdc] − α