A three-phase full converter supplied from a 230 V source is working as a line commutated inverter. The load consists of RLE type with R = 5 Ω, E = 200 V and L = 1 mH. A continues current of 10 A is flowing through the load, find the value of the firing angle delay.

Question

A three-phase full converter supplied from a 230 V source is working as a line commutated inverter. The load consists of RLE type with R = 5 Ω, E = 200 V and L = 1 mH. A continues current of 10 A is flowing through the load, find the value of the firing angle delay.

1 Answer

hutan · Answer 1 · 2022-10-07T21:26:30+0000

Right choice is (a) 119°

Explanation: Vo = 200 – 10×5 = 150V as the circuit is operating as an inverter Vo = -150V

Now, Vo = (3Vml/π) cos α

α = cos^-1(-150π/3√2×230) = 118.88°.

A three-phase full converter supplied from a 230 V source is working as a line commutated inverter. The load consists of RLE type with R = 5 Ω, E = 200 V and L = 1 mH. A continues current of 10 A is flowing through the load, find the value of the firing angle delay.

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