Detent-Force Minimization of Double-Sided Permanent Magnet Linear Synchronous Motor by Shifting One of the Primary Components

Huang, Xianhe; Yu, Han; Zhang, Bo; Li, Li Yi; Gerada, David; Gerada, Chris; Qian, Zhiyu

doi:10.1109/tie.2019.2892704

Cited by 43 publications

(19 citation statements)

References 23 publications

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“…Apart from the previously cited phase unbalance and flux density reduction, the end effect is also source of an additional thrust force ripple component known as end force or end effect force in LPMSMs. This force affects them even at no load condition [75], [90], [93].…”

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%

“…The performance of a segment-shifted machine can be improved with a rearrangement of the windings [90], [92], [93]. As the average thrust force is reduced with the increase of phase or pole shifting distance, the authors suggest that rearranging the winding configuration in the different primary sides can be a good solution for reducing the detent force without losing any force production capability.…”

Section: Linear Permanent Magnet Machinesmentioning

confidence: 99%

“…Double-sided machines generally exhibit a higher thrust capability than the single-sided counterparts [16], [47], [84], [85], [92], [93], [124], [138]. In such machines, the yokeless structure can enhance the thrust density of the conventional configuration [5], [120], [156].…”

Section: A Thrust Force Densitymentioning

confidence: 99%

“…For every RM, there is a LM counterpart, so Linear Induction Machines (LIMs) [6]- [42], Linear Switched Reluctance Machines (LSRMs) [43]- [66], or Linear Permanent Magnet Synchronous Machines (LPMSMs) [67]- [93], can be found in the literature. Besides the different machine types, several topologies are described in the literature.…”

Section: Introductionmentioning

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%