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Antiwindup Design for Induction Motor Control in the Field Weakening Domain

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4 Author(s)
Rodolphe Sepulchre ; Inst. Montefiore, Univ. de Liege, Liege, Belgium ; Thomas Devos ; Fabrice Jadot ; Francois Malrait

Operation of induction machines in the high-speed and/or high-torque range requires field-weakening to comply with voltage and current physical limitations. This paper presents an anti-windup approach to this problem: rather than developing an ad-hoc field weakening strategy in the high-speed region, we equip an unconstrained vector-control design with an anti-windup module that automatically adjusts the current and flux set-points so that voltage and current constraints are satisfied at every operating point. The anti-windup module includes a feedforward modification of the set point aimed at maximizing the available torque in steady-state and a feedback modification of the controller based on an internal model-based antiwindup scheme. This paper includes a complete stability analysis of the proposed solution and presents encouraging experimental results on an industrial drive.

Published in:

IEEE Transactions on Control Systems Technology  (Volume:21 ,  Issue: 1 )