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A Rotor Speed Estimation of Induction Motors Using Sliding Mode Cascade Observer  

김응석 (한라대 전기전자제어공학부)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers D / v.53, no.3, 2004 , pp. 145-153 More about this Journal
Abstract
A nonlinear adaptive speed observer is designed for the sensorless control of induction motors. In order to design the speed observer, the measurements of the stator currents and the estimates of the rotor fluxes are used. The sliding mode cascade observer is designed to estimate the time derivatives of the stator currents. The open-loop observer is designed to estimate the rotor fluxes and its time derivatives using the stator current derivatives. The adaptive observer is also designed to estimate the rotor resistance. Sequentially, the rotor speed is calculated using these estimated values. It is shown that the estimation errors of the corresponding states and the parameters converge to the specified residual set. It is also shown that the speed controller using these estimates is performed well. The simulation examples are represented to investigate the validity of the proposed observers for the sensorless control of induction motors.
Keywords
축차 관측기;속도추정;전류도함수;자속도함수;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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