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A Rotor Flux Observer Based on Nonlinear Quadrature Double Compensation

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Abstract:

In order to solve the problem of integration saturation drift and hardship in compensation quantity calculation exist in rotor flux observation of induction motor, a rotor flux observer method based on nonlinear quadrature double compensation is presented in this paper. The quantity of compensation is determined dynamically according to the quadrature level between flux and back electromotive force. With the order change of compensation and low-pass filter, quick response of flux is realized when signal frequency leaps. The experimental result shows that the method can improve the flux waveform, realize the accurate and swift track of flux.

Keywords: INTEGRATION SATURATION; LOW PASS FILTER; NONLINEAR QUADRATURE COMPENSATION; ROTOR FLUX OBSERVATION

Document Type: Research Article

DOI: https://doi.org/10.1166/asl.2012.2331

Publication date: 2012-03-01

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