TY - GEN

T1 - A robust sensorless sliding mode observer with speed estimate for the flux magnitude of the induction motor drive

AU - Comanescu, Mihai

PY - 2015/8/31

Y1 - 2015/8/31

N2 - The paper presents a sensorless sliding mode observer for the flux magnitude of the induction motor (IM) drive. In order to implement a vector control scheme for the IM, the angle of the rotor flux and the flux magnitude are needed. To obtain them, it is typical to use a stationary frame flux observer - once the α, β flux components have been estimated, they are used to compute the flux angle and the flux magnitude. However, in Indirect Field Orientation methods, such an observer is not used; then, a separate flux magnitude estimator is needed. The paper presents a flux observer that is based on a modified IM model in the rotating reference frame. This is constructed on the skeleton of a sensored observer - in order to make it sensorless, the observer is fed with a speed estimate. The paper shows that, with a certain gain design, the resulting sensorless observer is insensitive to the potential input speed inaccuracy. The observer yields an accurate flux magnitude without measuring the speed.

AB - The paper presents a sensorless sliding mode observer for the flux magnitude of the induction motor (IM) drive. In order to implement a vector control scheme for the IM, the angle of the rotor flux and the flux magnitude are needed. To obtain them, it is typical to use a stationary frame flux observer - once the α, β flux components have been estimated, they are used to compute the flux angle and the flux magnitude. However, in Indirect Field Orientation methods, such an observer is not used; then, a separate flux magnitude estimator is needed. The paper presents a flux observer that is based on a modified IM model in the rotating reference frame. This is constructed on the skeleton of a sensored observer - in order to make it sensorless, the observer is fed with a speed estimate. The paper shows that, with a certain gain design, the resulting sensorless observer is insensitive to the potential input speed inaccuracy. The observer yields an accurate flux magnitude without measuring the speed.

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U2 - 10.1109/CPE.2015.7231077

DO - 10.1109/CPE.2015.7231077

M3 - Conference contribution

AN - SCOPUS:84959057214

T3 - Proceedings - 2015 9th International Conference on Compatibility and Power Electronics, CPE 2015

SP - 224

EP - 229

BT - Proceedings - 2015 9th International Conference on Compatibility and Power Electronics, CPE 2015

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 9th International Conference on Compatibility and Power Electronics, CPE 2015

Y2 - 24 June 2015 through 26 June 2015

ER -