TY - GEN

T1 - Design of a pseudo-MRAS sliding mode observer with double feedback for estimation of the rotor time constant of the induction motor

AU - Comanescu, Mihai

PY - 2017/4/26

Y1 - 2017/4/26

N2 - The paper presents a method to estimate the inverse of the rotor time constant of the induction motor. The estimation is done using a sliding mode observer under the assumption that the stationary frame fluxes are known. These fluxes are first obtained using a voltage model observer; they are also used for field orientation. With measured voltages, currents, known fluxes and speed, the rotor time constant is estimated using a pseudo-MRAS sliding mode observer with dual feedback terms. The paper shows the design of this observer - this works well under ideal conditions. However, if the speed is inaccurate or if the magnetizing inductance saturates, the estimation accuracy suffers. The paper develops a model for the saturated induction motor and, using the equivalent controls that correspond to the sliding mode terms, attempts to estimate the saturation level - however, it is found that this is not possible.

AB - The paper presents a method to estimate the inverse of the rotor time constant of the induction motor. The estimation is done using a sliding mode observer under the assumption that the stationary frame fluxes are known. These fluxes are first obtained using a voltage model observer; they are also used for field orientation. With measured voltages, currents, known fluxes and speed, the rotor time constant is estimated using a pseudo-MRAS sliding mode observer with dual feedback terms. The paper shows the design of this observer - this works well under ideal conditions. However, if the speed is inaccurate or if the magnetizing inductance saturates, the estimation accuracy suffers. The paper develops a model for the saturated induction motor and, using the equivalent controls that correspond to the sliding mode terms, attempts to estimate the saturation level - however, it is found that this is not possible.

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U2 - 10.1109/ICIT.2017.7913095

DO - 10.1109/ICIT.2017.7913095

M3 - Conference contribution

AN - SCOPUS:85019620296

T3 - Proceedings of the IEEE International Conference on Industrial Technology

SP - 270

EP - 275

BT - 2017 IEEE International Conference on Industrial Technology, ICIT 2017

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 2017 IEEE International Conference on Industrial Technology, ICIT 2017

Y2 - 23 March 2017 through 25 March 2017

ER -