Single-pass induction motor parameter identification method taking into account saturation and rotor parameter variations

The paper describes a novel technique for on line parameter identification of three-phase induction motors from a single, run up to speed test. Data is sampled during this test with the normal locked rotor and synchronous speed data captured on the way to reaching the motor´s rated speed. Rotor parameter variations with frequency due to skin and proximity effects and other non linear imperfections such as heating and main flux path saturation are taken into account. This method is ideal for determining and/or verifying parameters used in high performance drives.