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Energy consumption optimization for AC drives position control

Branislav Ftorek (Department of Applied Mathematics, Faculty of Mechanical Engineering, University of Žilina , Žilina, Slovakia)
Milan Saga (Department of Applied Mathematics, Faculty of Mechanical Engineering, University of Žilina , Žilina, Slovakia)
Pavol Orsansky (Department of Applied Mathematics, Faculty of Mechanical Engineering, University of Žilina , Žilina, Slovakia)
Jan Vittek (Department of Applied Mathematics, Faculty of Mechanical Engineering, University of Žilina , Žilina, Slovakia)
Peter Butko (Department of Applied Mathematics, Faculty of Mechanical Engineering, University of Žilina , Žilina, Slovakia)

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering

ISSN: 0332-1649

Article publication date: 15 February 2021

Issue publication date: 20 August 2021

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Abstract

Purpose

The main purpose of this paper is to evaluate the two energy saving position control strategies for AC drives valid for a wide range of boundary conditions including an analysis of their energy expenses.

Design/methodology/approach

For energy demands analysis, the optimal energy control based on mechanical and electrical losses minimization is compared with the near-optimal one based on symmetrical trapezoidal speed profile. Both control strategies respect prescribed maneuver time and define acceleration profile for preplanned rest-to-rest maneuver.

Findings

Presented simulations confirm lower total energy expenditures of energy optimal control if compared with near-optimal one, but the differences are only small due to the fact that two energy saving strategies are compared.

Research limitations/implications

Developed overall control system consisting of energy saving profile generator, pre-compensator and position control system respecting principles of field-oriented control is capable to track precomputed state variables precisely.

Practical implications

Energy demands of both control strategies are verified and compared to simulations and preliminary experiments. The possibilities of energy savings were confirmed for both control strategies.

Originality/value

Experimental verification of designed control structure is sufficiently promising and confirmed assumed energy savings.

Keywords

Acknowledgements

The authors wish to thank the Slovak Grant Agency KEGA for support of research grants 027ŽU-4/2020 and 001ŽU-4/2020.

Citation

Ftorek, B., Saga, M., Orsansky, P., Vittek, J. and Butko, P. (2021), "Energy consumption optimization for AC drives position control", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 40 No. 3, pp. 309-324. https://doi.org/10.1108/COMPEL-10-2019-0429

Publisher

:

Emerald Publishing Limited

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