The electrical differential equations describing the performance of an induction motor following supply disconnection are solved, analytically by assuming the motor speed to remain constant over very short steps of the motor performance. The variation of the motor speed over different steps is taken into account by numerically integrating the mechanical equation of the motor at each step of the solution. The results obtained by this method coincide with those obtained by numerical integration of both the electrical and mechanical equations. They also show close agreement with experimental results of the stator voltage of a 3-pbase 1.5 kW induction motor.