Physics, asked by aashivishvishwakarma, 9 months ago

Difference between forced cummuted and line cummuted inverter

Answers

Answered by shirishanaidu499
1

➨It occurs in AC circuits i.e. when supply voltage is AC. Due to this, SCR turns off when negative voltage appears across the SCR. As there are no special circuits needed to turn off the SCR (thyristor), this type of commutation is known as natural commutation.

➨Natural Commutation in Thyristors take place in Phase controlled rectifiers, AC voltage controllers and Cyclo converters.

Forced Commutation

➨It is Applied to dc circuits.

➨Forced Commutation is achieved by reverse biasing SCR device or by reducing SCR current below the holding current value.

➨Commutating elements such as inductance and capacitance are used here.

➨Forced commutation is applied to choppers and inverters.

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