| Summary: | 碩士 === 國立成功大學 === 工程科學系 === 84 === In this thesis, we propose a fully digitalized vector control
scheme to achieve the tracking control of the speed and flux of
the induction motor. The high-performance current control is
employed such that the induction motor can satisfactorily
operate even when the saturation of supplied voltage occurs. To
estimate the rotor flux vector, we use stator current
information by passing through a low-pass filter such that the
actual system does not require additional sensors. The proposed
scheme combines a high-speed digital signal processor(TMS320
C31) and the driver we designed to establish the digital
implementation. Experimental results are given to demonstrate
the stability and robustness of the proposed control system.
Finally, based on the input-output linearization technique we
present the nonlinear control scheme for the induction motor
servo system to achieve the tracking goal of speed and flux.
Without direct mearsurement of rotor flux, we derive a discrete
Kalman filter to estimate the rotor flux only using the stator
current. The nonlinear controller is implemented by using
digital method through the samplerand holder. Numerical
simulation results are also presented to show the feasibility
and robustness of the proposed nonlinear controller.
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