MEASUREMENT OF THE SLIP DEPENDENCE OF THE PARAMETERS AND EVALUATION OF THE STEADY STATE TORQUE-SPEED CURVE OF ASYNCHRONOUS MACHINES BASED ON A RUN-UP TEST

Abstract

Traditional methods for measuring the slip dependence of the parameters and the torque of asynchronous motors in steady state condition give unreliable results due to the great changes of the winding resistances when the motor is operated along the range 0 ≤ s ≥ 1. The steady state torque-speed curve at nominal voltage can be calculated on the base of the equivalent circuit, if the true slip dependence of its elements is known.