Design of a Magnetic Lead Screw for Wave Energy Conversion

Holm, Rasmus Koldborg; Berg, Nick Ilsoe; Walkusch, Morten; Rasmussen, Peter Omand; Hansen, Rico Hjerm

doi:10.1109/tia.2013.2264272

Cited by 93 publications

(22 citation statements)

References 10 publications

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“…For the offshore industry to follow this trend and still integrate translational motion control in the OMS, there is a need to look at alternative linear drive solutions to the existing hydraulic systems. This is also motivated by the fact that an increasing number of attempts is reported in various industries to replace hydraulic linear drives with all-electric substitutes, as mentioned by Isermann et al (2002) or Holm et al (2013). In particular, permanent magnet linear actuators are promising due to the higher force levels they offer, especially when they are combined with additional solutions to increase the provided force even further, such as a double gas spring described by Ummaneni et al (2007).…”

Section: Electrification Of Powertrains Of Omsmentioning

confidence: 99%

Feasibility Study of Electromechanical Cylinder Drivetrain for Offshore Mechatronic Systems

Hagen¹,

Pawlus²,

Ebbesen³

et al. 2017

MIC

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Currently, there is an increasing focus on the environmental impact and energy consumption of the oil and gas industry. In offshore drilling equipment, electric motors tend to replace traditionally used hydraulic motors, especially in rotational motion control applications. However, force densities available from linear hydraulic actuators are still typically higher than those of electric actuators. Therefore, usually the remaining source of hydraulic power is thereby the hydraulic cylinder. This paper presents a feasibility study on the implementation of an electromechanical cylinder drivetrain on an offshore vertical pipe handling machine. The scope of this paper is to investigate the feasibility of a commercial off-the-shelf drivetrain. With a focus on the motion performance, numerical modeling and simulation are used when sizing and selecting the components of the considered electromechanical cylinder drivetrain. The simulation results are analyzed and discussed together with a literature study regarding advantages and disadvantages of the proposed solution considering the design criteria of offshore drilling equipment. It is concluded that the selected drivetrain can only satisfy the static motion requirements since the required transmitted power is higher than the recommended permissible power of the transmission screw. Consequently, based on the recommendation of the manufacturer, avoidance of overheating cannot be guaranteed for the drivetrain combinations considered for the case study presented in this paper. Hence, to avoid overheating, the average speed of the motion cycle must be decreased. Alternatively, external cooling or temperature monitoring and control system that prevents overheating could be implemented.

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Section: Electrification Of Powertrains Of Omsmentioning

confidence: 99%

Feasibility Study of Electromechanical Cylinder Drivetrain for Offshore Mechatronic Systems

Hagen¹,

Pawlus²,

Ebbesen³

et al. 2017

MIC

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“…Restrictions on outer radius and total length are imposed by the space restrictions of a certain application. Even without any space restrictions, very long rotors with small radius should be avoided as they are more prone to rotor deflection, and consequently, unbalanced radial forces [13]. In the studied TROMAG, it is assumed that the outer part is the translator and it is longer than the rotor by the amount of stroke.…”

Section: B Design Constraints Constants and Variables Of A Mitromagmentioning

confidence: 99%

“…The main losses of a TROMAG are then attributed to the bearings. The 17-kN lab prototype presented in [13] has exhibited an efficiency of over 90% at most operating points. Higher efficiencies are expected as the technology matures.…”

Section: B Design Constraints Constants and Variables Of A Mitromagmentioning

confidence: 99%

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Design of an Electric Machine Integrated with Trans-Rotary Magnetic Gear

Pakdelian¹,

Deshpande²,

Toliyat³

2015

IEEE Trans. Energy Convers.

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Design aspects of the trans-rotary magnetic gear (TROMAG) integrated rotary machine are discussed in this paper, with particular focus on optimizing system cost and weight. Analytical models are used for design of the TROMAG. Optimal designs of the rotary machine are found by using a populationbased genetic algorithm and two-dimensional finite-element analysis and thermal considerations. Weight, volume, and cost of the resultant system are then compared with the Pareto-optimal set of a permanent magnet linear tubular machine that is designed for the same force and speed specification. It is shown in this paper that, for high-force low-speed reciprocating motion applications, an electromechanical motion system consisting of a TROMAG and a rotary electric machine can far surpass a conventional direct drive linear machine in terms of weight, volume, and initial and operating cost.Index Terms-Finite-element analysis (FEA), linear permanent magnet (PM) machines, magnetic gear, trans-rotary magnetic gear.

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“…They are well suited to a variety of industry applications such as mining, renewable energy systems [90]- [92], marine propulsion systems, aerospace technology, and automotive applications [73], [76], [79], [93]. Within gearbox market segments, planetary gearboxes appear to be the fastest growing product sub-segment.…”

Section: Opportunities and Challengesmentioning

confidence: 99%

Magnetic gear technologies: A review

Tlali

Wang

Gerber

2014

2014 International Conference on Electrical Machines (ICEM)

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This paper reviews the historic and current development of magnetic gear technologies. There has been considerable amount of research and development activities on magnetic gear technologies in recent years. However, it is still not clear if this technology is ready for potential industry applications. The purpose of this paper is to summarize the historic and current development work of magnetic gear technologies in an attempt to give readers some insight into the advantages and disadvantages, challenges, opportunities and technology readiness.

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Design of a Magnetic Lead Screw for Wave Energy Conversion

Cited by 93 publications

References 10 publications

Feasibility Study of Electromechanical Cylinder Drivetrain for Offshore Mechatronic Systems

Feasibility Study of Electromechanical Cylinder Drivetrain for Offshore Mechatronic Systems

Design of an Electric Machine Integrated with Trans-Rotary Magnetic Gear

Magnetic gear technologies: A review

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