A novel double-sided flux-switching permanent magnet linear motor

Xiao, Feng; Sun, Yanchao; Zhu, Huangqiu; Zhao, Wenxiang; Li, Wenlong; Ching, T. W.; Qiu, Chun

doi:10.1063/1.4919271

Cited by 19 publications

(9 citation statements)

References 10 publications

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“…where TF rip represents thrust force ripples, TF max and TF min , are maximum and minimum value of thrust force. Thrust force density due to AC winding current density and PM volume TFD PM is also considered as key performance indicator, (4) is used to evaluate contribution of PM volume on the average thrust force [16]:…”

Section: Machine Configurationsmentioning

confidence: 99%

“…Thrust force density due to AC winding current density and PM volume

()(, TF D_{PM})

is also considered as key performance indicator, (4) is used to evaluate contribution of PM volume on the average thrust force [16]:

TF D_{PM} = \frac{normalT F_{avg}}{V_{PM}}

Detailed comparison of double‐sided LPMFSM having different mover‐to‐stator pole ratio is done in Table 3. Results depicted in Table 3 reveals that double‐sided LPMFSM with mover‐to‐stator pole ratio of 12/14 has highest average thrust force value and lowest thrust force ripple ratio.…”

Section: Machine Configurations and Operating Principlementioning

confidence: 99%

“…DMLPMFSM suffers with a drawback of low flux linkage with advantage of low thrust force ripples and detent force values. Both topologies are investigated in literature for numerous applications, such as ropeless elevator [7], linear oil pumping [15], electromagnetic launch systems [10], long stroke safety-critical applications [11], and low-speed applications [16].…”

Section: Introductionmentioning

confidence: 99%

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Performance comparison and optimisation of dual mover linear permanent magnet flux switching machine

Ullah

Khan

Basit

et al. 2019

IET Electric Power Applications

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Short moving primary and rigid low-cost secondary are important requirements of linear machines designed for long stroke applications. In the race, linear permanent magnet flux switching machine (LPMFSM) is a competitive candidate by confining excitation sources to short mover, thus making stator robust and low cost (made of only iron). However, single-sided LPMFSM exhibit a demerit of high normal (attraction) force due to its topology. In order to rectify the problem and enhance thrust force profile, two novel double-sided LPMFSMs are proposed with dual stator and dual mover topologies. After stator pole study, both topologies with same design dimensions are analysed and compared by 2-D finite element method here. Detailed analysis revealed that 12/14 DMLPMFSM exhibit low numerical values of thrust force ripples and detent force while maintaining average thrust force value. Hence, 12/14 DMLPMFSM is selected and optimised by structure-based deterministic optimisation (SBDO) approach to further enhance thrust force profile. Finally, comparison of initial and optimised design of 12/14 DMLPMFSM is presented to validate optimisation procedure.

show abstract

Section: Machine Configurationsmentioning

confidence: 99%

“…Thrust force density due to AC winding current density and PM volume

()(, TF D_{PM})

is also considered as key performance indicator, (4) is used to evaluate contribution of PM volume on the average thrust force [16]:

TF D_{PM} = \frac{normalT F_{avg}}{V_{PM}}

Section: Machine Configurations and Operating Principlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Performance comparison and optimisation of dual mover linear permanent magnet flux switching machine

Ullah

Khan

Basit

et al. 2019

IET Electric Power Applications

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show abstract

“…The detent force is reduced, but the back EMF is unbalanced. Another double‐sided flux‐switching PMLM topology which exhibits balanced back EMF and high‐force capability is developed in [29], but the detent force is large. For the double‐sided flux‐switching PMLM, the stator yoke can be removed [30].…”

Section: Introductionmentioning

confidence: 99%

Tubular unified magnetic‐field flux‐switching PMLM for free‐piston energy converter

Sui

Zheng

Liu

et al. 2019

IET Electric Power Applications

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A tubular flux-switching permanent-magnet linear machine (PMLM), which features unified magnetic field between the mover and two stators, is investigated for free-piston energy converter. The topology evolution, topology, operating principle and design considerations of the machine are thoroughly analysed. With the sinusoidal speed characteristic of free-piston Stirling engine considered, a tubular unified magnetic-field flux-switching PMLM is designed by finite-element analysis. Several main structural parameters, which include the outer and inner radius of the mover, the mover tooth width, the magnet thickness, the tooth widths of both the outer and inner stators and the widths of both the outer and inner stator yokes are studied to achieve high-force and mass-power density. Finally, the proposed machine is compared with two typical flux-switching PMLMs. The comparison results show that the unified magnetic-field flux-switching PMLM is suitable for applications which require highpower density, light mover structure and fast dynamic.

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“…HEDSLFSMs utilize both PMs and field windings as excitation sources. LFSPMM with double mover topology is investigated in [7], whereas [23] examined the performance of a LFSPMM with a double stator topology. Comparison of double stator and double mover LFSM is performed in [24] and the authors claim an advantage of a low thrust force ratio for the DSLFSM structure with moving primary (mover).…”

Section: Introductionmentioning

confidence: 99%

Enhancing Capabilities of Double Sided Linear Flux Switching Permanent Magnet Machines

et al. 2018

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Double sided linear flux switching permanent magnet machines (DSLFSPMMs) exhibit high thrust force density, high efficiency, low cost and robust double salient secondary (stator) structures. The aforementioned unique features make DSLFSPMM suitable for long stroke applications. However, distorted flux linkage waveforms and high detent forces can exaggerate thrust force ripples and reduce their applicability in many areas. In order to enhance thrust force performance, reduce thrust force ripple ratio and total harmonic distortion (THD) of no-load flux linkages, two structure-based advancements are introduced in this work, i.e., asynchronous mover slot and stator tooth displacement technique (AMSSTDT) and the addition of an active permanent magnet end slot (APMES). Furthermore, single variable geometric optimization (SVGO) is carried out by the finite element method (FEM).

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A novel double-sided flux-switching permanent magnet linear motor

Cited by 19 publications

References 10 publications

Performance comparison and optimisation of dual mover linear permanent magnet flux switching machine

Performance comparison and optimisation of dual mover linear permanent magnet flux switching machine

Tubular unified magnetic‐field flux‐switching PMLM for free‐piston energy converter

Enhancing Capabilities of Double Sided Linear Flux Switching Permanent Magnet Machines

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