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The Hydraulically Controlled Oscillating Piston Converter

Author

Listed:
  • Rudolf Scheidl

    (Institute of Machine Design and Hydraulic Drives, Johannes Kepler University Linz, Altenbergerstraße 69, 4040 Linz, Austria)

Abstract

One way to realize inertia in energy saving hydraulic switching converters is a mechanical oscillator connected to a piston. Its two basic advantages over the use of fluid in an inductance pipe are higher compactness and a better decoupling of inductance and capacitance; these are opposed by a more complex valve system, which raises costs if electric control is applied. This paper presents and studies an oscillating mass converter with pure hydraulic control. It features a pressure control function and constitutes a step-up converter. A simple model is established to elucidate the basic properties of the function principle under idealized conditions. The complete system with the hydraulic control concept is studied by an elaborate dynamical model. It is shown that the converter is able to operate in the intended way under the conditions of the mathematical model. A potential application for a load sensing type meter out control of a cylinder drive is sketched.

Suggested Citation

  • Rudolf Scheidl, 2021. "The Hydraulically Controlled Oscillating Piston Converter," Energies, MDPI, vol. 14(8), pages 1-17, April.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:8:p:2156-:d:535049
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    References listed on IDEAS

    as
    1. Wu, Guoheng & Yang, Junhong & Shang, Jianzhong & Fang, Delei, 2020. "A rotary fluid power converter for improving energy efficiency of hydraulic system with variable load," Energy, Elsevier, vol. 195(C).
    2. Min Pan & Andrew Plummer & Abdullah El Agha, 2017. "Theoretical and Experimental Studies of a Switched Inertance Hydraulic System in a Four-Port High-Speed Switching Valve Configuration," Energies, MDPI, vol. 10(6), pages 1-13, June.
    3. Christoph Gradl & Rudolf Scheidl, 2017. "Performance of an Energy Efficient Low Power Stepper Converter," Energies, MDPI, vol. 10(4), pages 1-21, March.
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    Cited by:

    1. Edward Lisowski & Grzegorz Filo & Janusz Rajda, 2021. "Analysis of the Energy Efficiency Improvement in a Load-Sensing Hydraulic System Built on the ISO Plate," Energies, MDPI, vol. 14(20), pages 1-14, October.

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