Magnetic equivalent circuit modeling and optimal control of a permanent magnet linear synchronous motor

Autori

• Christian Kra mer

Parametri

• Tecnologia e Ingegneria

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This work investigates a PMLSM to enhance transportation tasks in industrial manufacturing. A key objective is to achieve a comprehensive understanding of the electric machine through a detailed mathematical model that accurately reproduces its magnetic and electric behavior across various operational scenarios. Based on this calibrated model, an indirect force control strategy is developed, where a current controller tracks references calculated from desired forces. The current reference calculation is framed as an optimization problem aimed at minimizing ohmic losses in the stator coils while reducing the deviation between the modeled and desired forces. The current controller employs a flatness-based feedforward approach alongside a PI-like current error feedback mechanism. To facilitate the motor's primary function of moving the shuttle along predefined trajectories, the indirect force controller is enhanced with a flatness-based position controller, creating a cascaded motion control structure. This controller is compared to the industrial standard field-oriented control strategy, with evaluations conducted on a test bench across various scenarios and motor configurations. The tracking accuracy of position and forces is the main evaluation criterion, with a focus on the efficiency of the optimal control strategy. Results indicate a significant reduction in ohmic losses compared to the industrial standard, alongside improv

Lingua: Inglese

Pubblicato: 2023