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Energy Savings in Elevators by Using a Particular Permanent-Magnet Motor Drive

Author

Listed:
  • Vasileios I. Vlachou

    (Laboratory of Electrical Machines and Power Electronics, Department of Electrical and Computer Engineering, National Technical University of Athens, 15780 Athens, Greece)

  • Theoklitos S. Karakatsanis

    (Laboratory of Thermodynamics and Thermal Machines, Department of Production and Management Engineering, Democritus University of Thrace, 67100 Xanthi, Greece)

  • Antonios G. Kladas

    (Laboratory of Electrical Machines and Power Electronics, Department of Electrical and Computer Engineering, National Technical University of Athens, 15780 Athens, Greece)

Abstract

This paper presents the energy savings achieved by using a particular three-phase permanent-magnet motor drive control strategy in an elevator application. The proposed control methodology, based on a particular variable-amplitude variable-frequency voltage control pattern technique implemented in a permanent-magnet motor, is compared to a standard induction motor elevator case. By adopting appropriate simultaneous changes in the amplitude and frequency of the motor voltage, high speeds can be attained in conjunction with smooth starting and stopping actions involving a reduced supply current during the respective movement of the elevator. In addition, this method exhibits a high power factor with a good driving quality. The control technique introduced achieves the levelling-off of the floor and the group movement of the system using in the programmable memory a speed pattern that is generated targeting proportionality to the position of the lift. In that respect, significant energy savings can be obtained, which, depending on the type of motor implemented, can be up to 30% compared to the conventional techniques. These improvements can be attained with the appropriate handling of the applied pulse width modulation techniques. Various simulated and experimental results are given, illustrating the respective energy savings achieved with the proposed methodology.

Suggested Citation

  • Vasileios I. Vlachou & Theoklitos S. Karakatsanis & Antonios G. Kladas, 2023. "Energy Savings in Elevators by Using a Particular Permanent-Magnet Motor Drive," Energies, MDPI, vol. 16(12), pages 1-30, June.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:12:p:4716-:d:1171201
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    References listed on IDEAS

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    1. Mostafa Kermani & Erfan Shirdare & Saram Abbasi & Giuseppe Parise & Luigi Martirano, 2021. "Elevator Regenerative Energy Applications with Ultracapacitor and Battery Energy Storage Systems in Complex Buildings," Energies, MDPI, vol. 14(11), pages 1-16, June.
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