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Decentralized Phase Shedding with Low Power Mode for Multiphase Converter

Author

Listed:
  • Marc Cousineau

    (LAPLACE, Department of Electronics, Electrical Energy and Automation, ENSEEIHT Engineering School, University de Toulouse, CNRS, INPT, UPS, 3 Rue Charles Camichel, 31071 Toulouse, France)

  • Martin Monroy

    (LAPLACE, Department of Electronics, Electrical Energy and Automation, ENSEEIHT Engineering School, University de Toulouse, CNRS, INPT, UPS, 3 Rue Charles Camichel, 31071 Toulouse, France)

  • William Lorenzi Pol

    (NXP Semiconductors, Division Advanced Power System, 134 Avenue du Général Eisenhower, 31023 Toulouse, France)

  • Loic Hureau

    (NXP Semiconductors, Division Advanced Power System, 134 Avenue du Général Eisenhower, 31023 Toulouse, France)

  • Guillaume Aulagnier

    (NXP Semiconductors, Division Advanced Power System, 134 Avenue du Général Eisenhower, 31023 Toulouse, France)

  • Philippe Goyhenetche

    (NXP Semiconductors, Division Advanced Power System, 134 Avenue du Général Eisenhower, 31023 Toulouse, France)

  • Eric Rolland

    (NXP Semiconductors, Division Advanced Power System, 134 Avenue du Général Eisenhower, 31023 Toulouse, France)

  • Didier Flumian

    (LAPLACE, Department of Electronics, Electrical Energy and Automation, ENSEEIHT Engineering School, University de Toulouse, CNRS, INPT, UPS, 3 Rue Charles Camichel, 31071 Toulouse, France)

Abstract

With a multiphase converter, the phase-shedding function dedicated to maximizing the power efficiency, in a manner that is dependent on the load current, is always provided by a centralized controller that induces a Single Point of Failure (SPOF). The objective of this study is to obtain a decentralized control approach to implement this function by removing any SPOF. The method consists of using identical local controllers, each associated with a converter phase, that communicate with each other in a daisy-chain structure. Instead of measuring the global output current to determine the optimal number of active phases required, each local controller measures its own leg current and takes a local decision based on threshold crossing management and inter-controller communications. Functional simulations are carried out on a 5-leg 12 V/1.2 V 60 W multiphase converter supplying a modern microcontroller. They demonstrate that the number of active phases is well adjusted, in a dynamic manner, depending on the load current level. Specific events such as load current inrush or the start-up sequence are analyzed to guarantee optimal transient responses. A maximum power efficiency tracking ability is also demonstrated. Finally, it is shown that this control strategy allows phase shedding to be implemented using as many phases as desired, in a modular manner, thereby avoiding any centralized processing.

Suggested Citation

  • Marc Cousineau & Martin Monroy & William Lorenzi Pol & Loic Hureau & Guillaume Aulagnier & Philippe Goyhenetche & Eric Rolland & Didier Flumian, 2021. "Decentralized Phase Shedding with Low Power Mode for Multiphase Converter," Energies, MDPI, vol. 14(20), pages 1-15, October.
  • Handle: RePEc:gam:jeners:v:14:y:2021:i:20:p:6748-:d:658130
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    References listed on IDEAS

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    1. Hillesheim, Miguel Mannes & Cousineau, Marc & Vivert, Miguel & Aulagnier, Guillaume & Gateau, Guillaume, 2021. "Eigendecomposition of a digital iterative decentralised interleaving for multicellular converters," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 184(C), pages 82-105.
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