Recent development of linear machine topologies and applications

Lu, Qiuyu; Mei, Weihu

doi:10.23919/tems.2018.8326452

Cited by 23 publications

(5 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the same way as in permanent magnet RMs, LPMSMs show an excellent thrust force density, efficiency, power factor and controllability [83], [85], [89]. Their advantages make them a strong candidate for applications such as ropeless elevators [76], [80], [177], factory automation [78] and high precision machine tooling [177]- [179].…”

Section: Linear Permanent Magnet Machinesmentioning

confidence: 99%

“…Depending on the relative position between the primary and the secondary parts, the magnets on one side or another will attract the machine ends with more strength, generating the end effect ripple. The no load thrust ripple, also known as detent force, is the result of the sum of the conventional slot effect or cogging force and the end effect force [90], [93], [179]. As LPMSMs have to deal with multiple detent force ripple sources, several different solutions have been tested in order to reduce the open-circuit thrust pulsation, e. g. skewing magnets, adjusting the primary length, and slot shifting [69], [81], [85], [93].…”

Section: Linear Permanent Magnet Machinesmentioning

confidence: 99%

See 1 more Smart Citation

Linear Machines for Long Stroke Applications—A Review

et al. 2020

View full text Add to dashboard Cite

This document reviews the current state of the art in the linear machine technology. First, the recent advancements in linear induction, switched reluctance and permanent magnet machines are presented. The ladder slit secondary configuration is identified as an interesting configuration for linear induction machines. In the case of switched reluctance machines, the mutually-coupled configuration has been found to equate the thrust capability of conventional permanent magnet machines. The capabilities of the so called linear primary permanent magnet, viz. switched-flux, flux-reversal, doubly-salient and vernier machines are presented afterwards. A guide of different options to enhance several characteristics of linear machines is also listed. A qualitative comparison of the capabilities of linear primary permanent magnet machines is given later, where linear vernier and switched-flux machines are identified as the most interesting configurations for long stroke applications. In order to demonstrate the validity of the presented comparison, three machines are selected from the literature, and their capabilities are compared under the same conditions to a conventional linear permanent magnet machine. It is found that the flux-reversal machines suffer from a very poor power factor, whereas the thrust capability of both vernier and switched-flux machines is confirmed. However, the overload capability of these machines is found to be substantially lower than the one from the conventional machine. Finally, some different research topics are identified and suggested for each type of machine.

show abstract

Section: Linear Permanent Magnet Machinesmentioning

confidence: 99%

Section: Linear Permanent Magnet Machinesmentioning

confidence: 99%

Linear Machines for Long Stroke Applications—A Review

et al. 2020

View full text Add to dashboard Cite

show abstract

“…One of the most matured linear machine topologies utilizing a passive secondary is the Linear Induction Machine (LIM) [21]. Currently, LIMs are operational in more than 20 commercial metro lines [8] and utilized in ropeless lifting applications in the form of a vehicle stereo garage [12].…”

Section: A Topology Overviewmentioning

confidence: 99%

“…4, albeit that the permanent magnets are surface mounted on the primary teeth, which eases the manufacturing process. However, this makes the magnets easily affected by the magnetic field that is induced by the supply current, possibly leading to irreversible demagnetization [21].…”

Section: A Topology Overviewmentioning

confidence: 99%

“…5, but now the number of the permanent magnets located on the primary teeth is much larger, although with a smaller volume. The increase in the number of magnets limits the power factor of the LVM, but it also provides a gearing effect, greatly increasing the thrust force density at low speeds [21]. This restricts the effective use of the LVM to long stroke applications where the operation speeds are limited.…”

Section: A Topology Overviewmentioning

confidence: 99%

See 1 more Smart Citation

Review of Linear Motor Topologies with Passive Secondaries and a Comparison to an Active Secondary Topology

Kleijer

Custers

Lomonova

2020

2020 Fifteenth International Conference on Ecological Vehicles and Renewable Energies (EVER)

View full text Add to dashboard Cite

DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal.If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the "Taverne" license above, please follow below link for the End User Agreement:

show abstract