A separately excited DC Machine is fed from a DC voltage source ( Vdc ) through a class C chopper . The DC machine param

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A separately excited DC Machine is fed from a DC voltage source ( Vdc ) through a class C chopper . The DC machine parameters are : Ra , La , and Kap . Switch 1 of class C chopper is controlled by a pulse having period T and a duty cycle K while switch 2 compliments switch 1 operation . Draw the waveforms of the armature current ( ia ) then perform mathematical analysis to derive explicit expressions for the maximum ( Imax ) and minimum ( Imin ) of the machine armature current . Such expressions should be function of the machine parameters , the DC voltage supply , and the pulse period and duty cycle . I FOCUS