engineering recuitment HAL Management & Design Trainee Mock Test 2023 Electrical Machines Three Phase Induction Motor
A balanced three-phase voltage is applied to a star-connected induction motor, the phase to the neutral voltage being V, The stator resistance, rotor resistance referred to as the stator, and stator leakage reactance. rotor leakage reactance referred to the stator, and the magnetizing reactance is denoted by r1, r2, x1.x2, and Xm respectively. The magnitude of the starting current of the motor is given by:
1
\(\rm \frac{V}{\sqrt{(r_1 + r_2)^2 + (x_1 + x_2)^2}}\)
2
\(\rm \frac{V}{\sqrt{r_1^2 + (x_1 + X_m)^2}}\)
3
\(\rm \frac{V}{\sqrt{(r_1 + r_2)^2 + (X_m + x_2)^2}}\)
4
\(\rm \frac{V}{\sqrt{r_1^2 + (X_m + X_r)^2}}\)