Application of acceleration method for evaluation of induction motor torque-speed characteristics

This paper deals with practical application of acceleration method for evaluation of induction machine torque-speed and current-speed characteristics. Influence of measuring time on the shape of evaluated torque-speed characteristics is presented based on the results of measurements. One of the aims of this paper is also calculation and measurement of mechanical losses from deceleration test. A method for determination of distribution of friction and windage mechanical losses from the measurement is described. The influence of a cooling fan on the total mechanical losses is also discussed.