Nik Rumzi Nik Idris
Universiti Technologi Malaysia

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Experimental Evaluation of Torque Performance of Voltage and Current Models using Measured Torque for Induction Motor Drives Ibrahim M. Alsofyani; Tole Sutikno; Yahya A. Alamri; Nik Rumzi Nik Idris; Norjulia Mohamad Nordin; Aree Wangsupphaphol
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 5, No 3: 2015
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v5.i3.pp433-440

Abstract

In this paper, two kinds of observers are proposed to investigate torque estimation. The first one is based on a voltage model represented with a low-pass filter (LPF); which is normally used as a replacement for a pure integrator to avoid integration drift problem due to dc offset or measurement error. The second estimator used is an extended Kalman filter (EKF) as a current model, which puts into account all noise problems. Both estimation algorithms are investigated during the steady and transient states, tested under light load, and then compared with the measured mechanical torque. In all conditions, the torque estimation error for EKF has remained within a narrow error band and yielded minimum torque ripples, which motivate the use of the EKF estimation algorithm in high performance control drives of IMs for achieving high dynamic performance.