Question

a six pulse thyristor converter, connected to 230 v , 50 hz, 3-phase a.c. supply. if the reactance on a.c. side is 0.1502 and the commutation angle is 15* calculate the d.c. load current

Answer 1

The DC load current is approximately 3415.42 Amperes.

Step-by-step explanation:

To calculate the DC load current in a six-pulse thyristor converter connected to a 230V, 50Hz, 3-phase AC supply with a reactance of 0.1502 ohms and a commutation angle of 15 degrees, you can use the following formula:

DC Load Current (I_DC) = V_phase / (2 * √3 * X * sin(α))

Where:

• V_phase is the phase voltage of the AC supply, which is 230V in this case.

• X is the reactance on the AC side, which is 0.1502 ohms.

• α is the commutation angle, which is 15 degrees. Convert this to radians by multiplying by π/180.

Now, let's calculate the DC load current:

α = 15 degrees * (π / 180) ≈ 0.2618 radians

I_DC = 230V / (2 * √3 * 0.1502 ohms * sin(0.2618 radians))

I_DC ≈ 230V / (2 * √3 * 0.1502 ohms * 0.2554)

I_DC ≈ 230V / (0.2618 ohms * 0.2554)

I_DC ≈ 3415.42 A

The DC load current is approximately 3415.42 Amperes.