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NONLINEAR DECOUPLING CONTROL STRATEGY FOR VARIABLE FREQUENCY INDUCTION MOTOR SYSTEM FED BY HYSTERESIS-BAND CURRENT-CONTROLLED PWM INVERTER
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| Author(s) |
B. Chen; Y. Ruan; Y. Xu; S. Gong |
| Abstract |
The dynamic model of induction motor fed by hysteresis-band current-controlled PWM inverter is a nonlinear multivariable system with strong coupling. In this paper, the theory of feedback linearization for nonlinear systems is applied to realize linearization and decoupling of this control object with consideration of the time delay of hysteresis band. As a result, two linear subsystems-rotor speed subsystem and rotor flux linkage subsystem are obtained. The regulators of these two linear subsystems can be easily designed by ordinary method based on linear theory. An AC variable frequency speed-regulating system is formed with the nonlinear decoupling algorithm incoporated in a 8096 single-chip microcomputer. Finally, experimental results show that the dynamic behaviour of this system is excellent. |
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| Filename: | Unnamed file |
| Filesize: | 1.592 MB |
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| Type |
Members Only |
| Date |
Last modified 2019-05-16 by System |
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