Design of feedback linearization second-order sliding mode stator flux observer for induction motors
PAN Yue-dou
CHEN Tao
GUO Ying-wei
Abstract：In order to improve the observation accuracy of stator flux of induction motors, a second-order sliding mode flux estimation method based on feedback linearization is proposed. A stator flux observer is designed and applied for direct torque control (DTC) of induction motors. The rotor flux is selected as the system’s output to estimate the flux more accurately, the induction motor system is input-output linearized by using the differential geometry theory, and the feedback linearization model with rotor flux as output is obtained. On this basis, a rotor flux second-order sliding mode observer is designed based on Super-twisting algorithm to estimate rotor flux, and this paper analysis the stability of the designed observer. By using the relationship between the stator flux and the rotor flux to estimate the stator flux. The observer is applied to DTC of induction motors and achieves a good control performance. Simulation and experiment results verify the feasibility and effectiveness of the proposed method.
Keywords：induction motorfeedback linearizationsecond-order sliding modeflux estimationdirect torque control
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 1474-1482 )