Abstract: This paper presents when unbalanced is introduced in the stator circuit, the result is obtained in the form of unbalanced of stator current , rotor current,torque and speed of the machine. In this study unstaisfactory parameters of stator current , rotor current ,torque and speed via simulation are presents. In this paper single phase supply apply on the two pahses of induction machine.The simulation results are also given which shows the performance of asynchronous (induction) motor.This simulation results justify the abnormality in the speed and torque of the machine.In this study results obtained under unbalance are also compared with the results under balanced condition.