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A voltage commutated chopper feeds power to an electric car (battery-powered). The battery voltage is 60 V. Starting current is 60 A and the SCR turn-off time is 20 μs. Calculate the value of inductance (L) required for the commutating circuit.

A voltage commutated chopper feeds power to an electric car (battery-powered). The battery voltage is 60 V. Starting current is 60 A and the SCR turn-off time is 20 μs. Calculate the value of inductance (L) required for the commutating circuit. Correct Answer

L = (Vs/Io)2 x C C = (tc x Io)/Vs C = ( 40 x 60 x 10-6)/60 = 40 x 10-6 F L = (60/60)2 x 40 x 10-6 = 40 uH.

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