TY - GEN

T1 - A synchronous reference frame sliding mode based estimator for the speed and flux magnitude of the induction motor drive

AU - Comanescu, Mihai

PY - 2014/1/1

Y1 - 2014/1/1

N2 - The paper discusses the problem of speed and rotor flux magnitude estimation for the induction motor (IM) drive and presents a sliding mode observer (SMO) that is constructed based on the IM model in the synchronous reference frame. To implement the control scheme of the IM drive, generally, the speed and the flux magnitude are needed. In a control scheme with speed and flux regulation, they are used for d and q axis feedback. If the current control scheme uses a decoupling compensator, the flux and speed are needed to compute the decoupling voltages. The paper develops a SM observer for the flux magnitude based on the synchronous reference frame model of the IM. The method assumes that the d-q voltages and currents are available. The observer requires knowledge of the motor speed-instead, the SMO is fed with a speed estimate (assumed inaccurate). Using a specific gain design, the SMO is made insensitive to the input speed inaccuracy. Using the equivalent controls of the observer, the initial speed estimate is corrected to obtain two secondary speed estimates. A weighted average speed estimate that combines the secondary estimates is also shown. The theoretical findings are supported with simulations.

AB - The paper discusses the problem of speed and rotor flux magnitude estimation for the induction motor (IM) drive and presents a sliding mode observer (SMO) that is constructed based on the IM model in the synchronous reference frame. To implement the control scheme of the IM drive, generally, the speed and the flux magnitude are needed. In a control scheme with speed and flux regulation, they are used for d and q axis feedback. If the current control scheme uses a decoupling compensator, the flux and speed are needed to compute the decoupling voltages. The paper develops a SM observer for the flux magnitude based on the synchronous reference frame model of the IM. The method assumes that the d-q voltages and currents are available. The observer requires knowledge of the motor speed-instead, the SMO is fed with a speed estimate (assumed inaccurate). Using a specific gain design, the SMO is made insensitive to the input speed inaccuracy. Using the equivalent controls of the observer, the initial speed estimate is corrected to obtain two secondary speed estimates. A weighted average speed estimate that combines the secondary estimates is also shown. The theoretical findings are supported with simulations.

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U2 - 10.1109/SPEEDAM.2014.6871912

DO - 10.1109/SPEEDAM.2014.6871912

M3 - Conference contribution

AN - SCOPUS:84906668363

SN - 9781479947492

T3 - 2014 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM 2014

SP - 725

EP - 730

BT - 2014 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM 2014

PB - IEEE Computer Society

T2 - 2014 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM 2014

Y2 - 18 June 2014 through 20 June 2014

ER -