Question

Difference between forced cummuted and line cummuted inverter

Answer 1

Explanation:

➨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.

Answer 2

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Difference between natural(line) commutation and forced commutation

Natural(line) commutator-

• requires Ac input
• no external components required
• used in controll rectifiers, AC voltage controller
• no power loss
• zero cost
• SCR turns off due to current voltage supply

Forced commutation-

• requires DC input
• external components required
• used in choppers, inveeters
• power loss
• significant cost
• SCR turns off due to current and voltage both

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Hope it helps ❤︎