Real-time SOSM super-twisting combined with block control for regulating induction motor velocity
On this paper, a robust velocity controller applied to a three-phase squirrel-cage induction motor under variable load conditions is designed. The induction motor drives an induction generator representing the load which freely delivers the generated power to the utility grid. The closed-loop sche...
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| Main Author: | |
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| Other Authors: | , , , , |
| Format: | Artículo |
| Language: | en_US |
| Published: |
2018
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| Subjects: | |
| Online Access: | https://doi.org/10.1109/ACCESS.2018.2812187 https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=8306951 |
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| Summary: | On this paper, a robust velocity controller applied to a three-phase squirrel-cage induction motor
under variable load conditions is designed. The induction motor drives an induction generator representing
the load which freely delivers the generated power to the utility grid. The closed-loop scheme is designed
at alpha-beta coordinate frame and is based on the linearization block control technique in combination with
the super-twisting algorithm. The controlled output variables are the angular mechanical velocity and the
square modulus of rotor ux linkages. The motor reference velocity is set up by a pulse train above
the synchronous velocity and, consequently, the impelled induction machine operates in generator mode;
meanwhile, the reference of rotor ux square modulus varies according to load condition of the induction
motor. In order to estimate the non-measurable variables, both a rotor ux linkages observer and a load
torque observer are designed. For the first one, a non-linear state observer using fi rst order sliding modes is
applied at alpha-beta coordinate frame and, for the second one, a Luenberger reduced asymptotic observer is used.
The validation of the robustness for the proposed velocity controller is performed in a real-time experiment
using a work-bench. |
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