The authors present a new phase axesmodelof three phaseasynchronous machines considering the stator iron loss. The model can be used when the parameters of the machine's stator are unbalance. The simulation and experiment results show that the stator currents are influenced by the iron loss distinctly. The simulation results considering the stator iron loss is more consistent with the measured data in laboratory comparing with those neglecting the stator iron loss. The phase axes model considering the stator iron has better precision and very useful in the asynchronous machine's monitoring and control.