Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title A Study on the Off-Line Parameter Estimation for Sensorless 3-Phase Induction Motor using the D-Axis Model in Stationary Frame
Authors Tae-Yang Mun ; Chi-Gak In ; Joohn-Sheok Kim
DOI 10.6113/TKPE.2020.25.1.13
Page pp.13-20
ISSN 1229-2214
Keywords 3-phase induction motor; Off-line parameter estimation; IPT-PLL; FOC(Field Oriented Control); Stationary frame model
Abstract Accurate parameters based on equivalent circuit are required for high-performance field-oriented control in a three-phase induction motor. In a normal case, stator resistance can be accurately measured using a measuring equipment. Except for stator resistance, all machine parameters on the equivalent circuit should be estimated with particular algorithms. In the viewpoint of traditional regions, the parameters of an induction motor can be identified through the no-load and standstill test. This study proposes an identification method that uses the d-axis model of the induction motor in a stationary frame with the predefined information on stator resistance. Mutual inductance is estimated on the rotational dq coordination similar to that in the traditional no-load experiment test. The leakage inductance and rotor resistance can be estimated simply by applying different voltages and frequencies in the d-axis model of the induction motor. The proposed method is verified through simulation and experimental results.