Topology structure selection of permanent magnet linear synchronous motor for ropeless elevator system

Zhu, Yu-wu; Lee, Sang-Geon; Cho, Yun‐Hyun

doi:10.1109/isie.2010.5637992

Cited by 7 publications

(3 citation statements)

References 6 publications

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“…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%

“…If the main requirement of the installation is the removal of force ripples, air-cored machines are a great solution, as they are not affected by any means by the detent force [70], [71], [76]. However, the thrust density of these machines is quite low [70], [71], [76], [82], [188], and either armature windings or secondary magnets need to be mounted in the long rail. Thus, core-less designs result in high-bulk and highcost machines.…”

Section: B Thrust Force Ripplementioning

confidence: 99%

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Linear Machines for Long Stroke Applications—A Review

et al. 2020

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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.

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Section: Linear Permanent Magnet Machinesmentioning

confidence: 99%

Section: B Thrust Force Ripplementioning

confidence: 99%

Linear Machines for Long Stroke Applications—A Review

et al. 2020

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“…Recently, following the increasing height of the buildings and mines, the ropeless elevator driven by Permanent Magnet Linear Synchronous Motor(PMLSM) attracts much more attentions because of its many advantages such as large thrust density, high efficiency, fast response, accurate positioning, simple structure and no height limit and so on [1,2]. PMLSM with primary core opening slots and both breaking ends has the detent force caused by the cogging effect and end effect, which will lead to thrust fluctuations, affecting the low-speed performance and positioning accuracy.…”

Section: Introductionmentioning

confidence: 99%

Detent Force Modeling and Analysis for Vertical Permanent-Magnet Linear Synchronous Motor Using Equivalent Magnetic Network Method

Wang

Feng

et al. 2011

AMM

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This paper investigates the detent force modeling of a slotted iron core type vertical permanent magnet linear synchronous motor (PMLSM) for ropeless elevator applications. Variable network non-linear magnetic equivalent circuit model is established to predict the detent force of PMLSM. The topology structure of equivalent magnetic circuit is developed and the permeances are derived and calculated. The end effect of two end teeth is essential for analysis of detent force and it is focused in the modeling. Magnetic saturation of primary iron-core also be taken into account. In final some 3-D finite-element numerical calculation results are used to validate the feasibility of the proposed method.

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