A Class of Energy Efficient Self-Contained Electro-Hydraulic Drives with Self-Locking Capability
Pump controlled and self-contained electro-hydraulic cylinder drives may improve energy efficiency and reduce installation space compared to conventional valve solutions, while being in line with the trend of electrification. The topic has gained increasing interest in industry as well as in academi...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-05-01
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| Series: | Energies |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1073/12/10/1866 |
| _version_ | 1798005669528338432 |
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| author | Lasse Schmidt Søren Ketelsen Morten Helms Brask Kasper Aastrup Mortensen |
| author_facet | Lasse Schmidt Søren Ketelsen Morten Helms Brask Kasper Aastrup Mortensen |
| author_sort | Lasse Schmidt |
| collection | DOAJ |
| description | Pump controlled and self-contained electro-hydraulic cylinder drives may improve energy efficiency and reduce installation space compared to conventional valve solutions, while being in line with the trend of electrification. The topic has gained increasing interest in industry as well as in academia in recent years. However, this technology has failed to break through in industry on a broad scale, with the reason assumed to be lack of meeting industry requirements. These requirements include high drive stiffness enabling a large application range, and the ability to maintain cooling and filtration in required ranges, enabling proper reliability and durability. Furthermore, at this point the cost of realization of such drives is comparable only to high end valve drive solutions, while not providing dynamics on a similar level. An initiative to improve this technology in terms of a class of drives evolving around a hydraulic cylinder locking mechanism is proposed. The resulting class of drives generally rely on separate cylinder forward and return flow paths, allowing for fluid cooling and filtration as well as control of the drive stiffness. The proposed class of drives is analyzed regarding energy loss and recovery potential, a basic model based control design is realized, and the industrial feasibility of the drive class is considered. It is found that the proposed class of drives may be realized with standard components maintained in their design ranges at competitive costs compared to conventional valve solutions. Furthermore, it is found that pressure levels may be controlled in a proper way, allowing to produce either highly efficient operation or a high drive stiffness. |
| first_indexed | 2024-04-11T12:43:02Z |
| format | Article |
| id | doaj.art-56ed25ff2c6d4f3c9fae2958423d2399 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T12:43:02Z |
| publishDate | 2019-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-56ed25ff2c6d4f3c9fae2958423d23992022-12-22T04:23:26ZengMDPI AGEnergies1996-10732019-05-011210186610.3390/en12101866en12101866A Class of Energy Efficient Self-Contained Electro-Hydraulic Drives with Self-Locking CapabilityLasse Schmidt0Søren Ketelsen1Morten Helms Brask2Kasper Aastrup Mortensen3Department of Energy Technology, Aalborg University, Pontoppidanstraede 111, 9220 Aalborg, DenmarkDepartment of Energy Technology, Aalborg University, Pontoppidanstraede 111, 9220 Aalborg, DenmarkBosch Rexroth A/S, Gungevej 1, 2650 Hvidovre, DenmarkBosch Rexroth A/S, Gungevej 1, 2650 Hvidovre, DenmarkPump controlled and self-contained electro-hydraulic cylinder drives may improve energy efficiency and reduce installation space compared to conventional valve solutions, while being in line with the trend of electrification. The topic has gained increasing interest in industry as well as in academia in recent years. However, this technology has failed to break through in industry on a broad scale, with the reason assumed to be lack of meeting industry requirements. These requirements include high drive stiffness enabling a large application range, and the ability to maintain cooling and filtration in required ranges, enabling proper reliability and durability. Furthermore, at this point the cost of realization of such drives is comparable only to high end valve drive solutions, while not providing dynamics on a similar level. An initiative to improve this technology in terms of a class of drives evolving around a hydraulic cylinder locking mechanism is proposed. The resulting class of drives generally rely on separate cylinder forward and return flow paths, allowing for fluid cooling and filtration as well as control of the drive stiffness. The proposed class of drives is analyzed regarding energy loss and recovery potential, a basic model based control design is realized, and the industrial feasibility of the drive class is considered. It is found that the proposed class of drives may be realized with standard components maintained in their design ranges at competitive costs compared to conventional valve solutions. Furthermore, it is found that pressure levels may be controlled in a proper way, allowing to produce either highly efficient operation or a high drive stiffness.https://www.mdpi.com/1996-1073/12/10/1866self-contained hydraulic drivespump controlled cylinder drivesdirect driven hydraulicsenergy efficiencyhydraulic actuationlinear actuation |
| spellingShingle | Lasse Schmidt Søren Ketelsen Morten Helms Brask Kasper Aastrup Mortensen A Class of Energy Efficient Self-Contained Electro-Hydraulic Drives with Self-Locking Capability Energies self-contained hydraulic drives pump controlled cylinder drives direct driven hydraulics energy efficiency hydraulic actuation linear actuation |
| title | A Class of Energy Efficient Self-Contained Electro-Hydraulic Drives with Self-Locking Capability |
| title_full | A Class of Energy Efficient Self-Contained Electro-Hydraulic Drives with Self-Locking Capability |
| title_fullStr | A Class of Energy Efficient Self-Contained Electro-Hydraulic Drives with Self-Locking Capability |
| title_full_unstemmed | A Class of Energy Efficient Self-Contained Electro-Hydraulic Drives with Self-Locking Capability |
| title_short | A Class of Energy Efficient Self-Contained Electro-Hydraulic Drives with Self-Locking Capability |
| title_sort | class of energy efficient self contained electro hydraulic drives with self locking capability |
| topic | self-contained hydraulic drives pump controlled cylinder drives direct driven hydraulics energy efficiency hydraulic actuation linear actuation |
| url | https://www.mdpi.com/1996-1073/12/10/1866 |
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