Improved Parameter Estimation Techniques for Induction Motors using Hybrid Algorithms
For engineers needing accurate induction motor parameter estimation from limited data, this hybrid approach offers improved performance over existing methods.
The paper proposes a hybrid algorithm combining descent and natural optimization methods for estimating induction motor parameters from manufacturer data, achieving significantly better convergence and squared error rates than conventional algorithms across 6,380 motors.
The performance of Newton-Raphson, Levenberg-Marquardt, Damped Newton-Raphson and genetic algorithms are investigated for the estimation of induction motor equivalent circuit parameters from commonly available manufacturer data. A new hybrid algorithm is then proposed that combines the advantages of both descent and natural optimisation algorithms. Through computer simulation, the hybrid algorithm is shown to significantly outperform the conventional algorithms in terms of convergence and squared error rates. All of the algorithms are tested on a large data set of 6,380 IEC (50Hz) and NEMA (60Hz) motors.