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An Electro-Hydraulically Controlled Cylinder on a Loader Crane
Linköping University, Department of Management and Engineering, Fluid and Mechatronic Systems.
Linköping University, Department of Management and Engineering, Fluid and Mechatronic Systems.
2018 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

With tighter emission regulations for road vehicles pushing the technology forward, fuel savings are indirectly affecting the designs and technical solutions of loader cranes. By decentralizing the hydraulic power through driving each actuator separately, the goal of a more efficient crane drive is strived for. This thesis analyzes if the simple concept of a pump-controlled cylinder directly driven by an induction motor is achievable for a loader crane. Further, the crucial role of the induction motor is studied both mathematically and physically. A special research is also performed on energy efficiency and the capability of electric energy regeneration. By forming the transfer function of the system and performing measurements on a physical setup, the conclusion is drawn that the proposed pump-controlled cylinder concept is fully functional for its purpose which implies that the technology is promising. The report identifies a number of complications with this configuration, such as the induction motor demonstrating reduced performance at high loads and low speeds. Suggestions of improvements are presented with regards to these issues. The thesis also demonstrates high efficiency during a lifting motion and that the possibility of efficient electric energy regeneration is achievable if an optimum lowering speed is considered.

Place, publisher, year, edition, pages
2018. , p. 85
Keywords [en]
pump controlled cylinder crane asynchronos motor energy efficieny control
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:liu:diva-151675ISRN: LIU-IEI-TEK-A--18/03032--SEOAI: oai:DiVA.org:liu-151675DiVA, id: diva2:1252091
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HIAB AB
Subject / course
Mechanical Engineering
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Examiners
Available from: 2018-10-12 Created: 2018-09-30 Last updated: 2018-10-12Bibliographically approved

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CiteExportLink to record
Permanent link

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Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
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  • asciidoc
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