The parameter of an equivalent circuit of a three-phase induction motor affected by reducing the rms value of the supply voltage at the rated frequency is

Q. The parameter of an equivalent circuit of a three-phase induction motor affected by reducing the rms value of the supply voltage at the rated frequency is

(A) rotor resistance

(B) rotor leakage reactance

(C) magnetizing reactance

(D) stator resistance

Ans: magnetizing reactance

Solution:

Magnetic reactance (Xm) is depends on airgap flux and the flux is depends on V/f.

X_m ∝ ϕ ∝ V/f

Hence, magnetizing reactance gets affected by reducing the rms value of the supply at the rated frequency.