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Current Estimation and Optimal Control in Multiphase DC–DC Converters With Single Current Sensor | IEEE Journals & Magazine | IEEE Xplore

Current Estimation and Optimal Control in Multiphase DC–DC Converters With Single Current Sensor


Abstract:

The interleaved parallel topology of the dc–dc converter can increase the load capacity and reduce the ripple. However, the multiphase control system requires many curren...Show More

Abstract:

The interleaved parallel topology of the dc–dc converter can increase the load capacity and reduce the ripple. However, the multiphase control system requires many current sensors, which increases the software/hardware cost. To solve this problem, this article proposes a dual time-scale model predictive control (DMPC) algorithm based on a single current sensor. First, the current estimator replaces current sensors to measure the unbalanced branch currents and reduce hardware complexity. Then, a DMPC algorithm is proposed to reduce the parallel computational complexity of the controller. Furthermore, a parameter identification module dynamically updates the current estimator and controller to further increase the system’s accuracy. This method reduces the software/hardware complexity while ensuring control effectiveness. The validity of the proposed algorithm is verified on a three-phase buck converter.
Article Sequence Number: 9003414
Date of Publication: 06 May 2024

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