Electro-hydraulic drive of the variable ratio lifting device under active load
Abstract
Hydraulic systems fed by fixed displacement pumps driven by frequency-controlled electric motors can replace conventional throttling systems due to their ability to control the speed of hydraulic cylinders regardless of the value and direction of the load. These systems can improve the energy efficiency of the drive or even provide the possibility of energy recuperation during lowering. This paper presents experimental studies of the new drive system with volumetric control of the speed of the lifted/lowered payload using the example of a scissor lift. The system uses a reversible gear pump driven by an asynchronous motor fed by a frequency inverter operating in field-oriented control mode. Comparative studies of the mapping of the assumed speed of the hydraulic cylinder and platform are presented, as well as studies of the influence of the load change on the speed and positioning of the mechanism driven by the open-loop controlled system.
Keywords
hydraulic drives;speed controlled pumps;variable-ratio device;lifting systems;
Data
| Language: | English |
|---|---|
| Year of publishing: | 2021 |
| Typology: | 1.01 - Original Scientific Article |
| Organization: | UL FS - Faculty of Mechanical Engineering |
| UDC: | 621.22 |
| COBISS: |
88437507
|
| ISSN: | 0039-2480 |
| Views: | 158 |
| Downloads: | 54 |
| Average score: | 0 (0 votes) |
| Metadata: |
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Other data
| Secondary language: | Slovenian |
|---|---|
| Secondary title: | Elektrohidravlični pogon aktivno obremenjene dvigalne naprave z variabilnim razmerjem |
| Secondary keywords: | hidravlični pogoni;črpalka z nastavljivo hitrostjo;naprava z variabilnim razmerjem;dvigalni sistem; |
| Type (COBISS): | Article |
| Pages: | str. 599-610 |
| Volume: | ǂVol. ǂ67 |
| Issue: | ǂno. ǂ11 |
| Chronology: | Nov. 2021 |
| DOI: | 10.5545/sv-jme.2021.7320 |
| ID: | 14075137 |
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