Nonlinear Equivalent Magnetic Circuit Analysis for Linear Flux-Switching Permanent Magnet Machines

Zhou, Suyang; Yu, Haitao; Hu, Minqiang; Jiang, Chongxue; Huang, Lei

doi:10.1109/tmag.2011.2173467

Cited by 44 publications

(28 citation statements)

References 8 publications

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“…In recent years, linear flux‐switching permanent magnet (LFSPM) machines, which inherit the advantages of high thrust density of the rotary FSPM machines, attract a lot of interests around researchers. For applications like URT that always adopts linear machines with long stator and short mover, the LFSPM motor is a good choice due to the following merits when compared with the conventional PM linear motor : Simple stator structure . The stator is salient and robust without PMs or windings, which makes road maintenance easier and the cost lower; High reliability and good thermal dissipation .…”

Section: Introductionmentioning

confidence: 99%

Thrust force enhancement and ripple reduction of a sandwiched linear flux switching permanent magnet machine with segment stator for urban rail transit

Hao

Wang

2018

IEEJ Transactions Elec Engng

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Linear flux-switching permanent magnet (LFSPM) machines have significant potential in many applications like urban rail transit, automobile and naval. In order to reach high thrust force capability, a sandwiched LFSPM machine (SLFSPM) is investigated in this paper to enhance the usage of both PMs and steel. This machine is found to have higher thrust force after being optimized for maximum thrust force and compared with a optimized conventional 12/14 LFSPM machine based on FEA. However, big thrust ripples will limit its application in many areas. Thus, the SLFSPM machine is improved with two end PMs to suppress the thrust ripple that caused by the unbalanced back-EMFs, and then, to reduce the thrust ripples that caused by cogging force, the SLFSPM machine with segment stator struture (SLFPM-SS) is proposed, and the cogging force can be minimized without thrust force capability decrease. Based on FEA results, the SLFPM-SS machine can maintain high thrust force capability and at the same time, achieve small thrust force ripples and high sinusoidal back-EMFs.

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Section: Introductionmentioning

confidence: 99%

Thrust force enhancement and ripple reduction of a sandwiched linear flux switching permanent magnet machine with segment stator for urban rail transit

Hao

Wang

2018

IEEJ Transactions Elec Engng

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“…This LPMC model construction is simple because there is no PM in switched reluctance machine. In [8][9][10][11][12][13][14][15], the LPMC models for doubly salient PM, axial-flux PM, spoke-type PM and flux-switching PM machines were built. The magnetization directions of their PMs are tangential.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Analysis of Halbach Magnetized Permanent-Magnets Machine by Using Lumped Parameter Magnetic Circuit Method

Shao¹,

Zhao²,

Ji³

et al. 2015

PIER M

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Abstract-Permanent-magnets (PMs) with tangential and parallel magnetization directions are combined in the Halbach PM (HPM) machine, which can offer high performances. However, the existing lumped parameter magnetic circuit (LPMC) model can only calculate one PM magnetization direction, namely either tangential direction or parallel direction. The key of this paper is to propose a method to divide and establish equivalent magnetic motive force (MMF) for HPM machine with both tangential and parallel magnetizations. Then, a LPMC model, using equivalent MMF, is developed to predict the electromagnetic performances for a four-phase HPM machine. In order to verify the effectiveness of the proposed LPMC model, a 6-pole/8-slot 15 kW HPM prototype is built. The comparative results of the proposed LPMC model, two-dimensional (2D) FEM and the experiments verify the effectiveness of the proposed LPMC model.

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“…Its disadvantage is its low accuracy. Some improvement of the MEC has been made by scholars; the main aim is to improve the accuracy of the MEC method, and keep its characteristic of fast calculation speed, to fit the demands of electromagnetic device calculation, and parameter design [6]. The infinitesimal element idea of FEM is introduced into the MEC, and an infinitesimal element solution is established, leading to an equation to be used in calculations [7].…”

Section: Introductionmentioning

confidence: 99%

A Type of Subsection Model for a Permanent Magnet Bar and its Leakage Permeance Calculation Method in an Open Magnetic Circuit

Liang¹,

You²,

Yang³

et al. 2014

Journal of Magnetics

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The equivalent model of a permanent magnet (PM) plays an important role in electromagnetic system calculation. A type of subsection model for a PM bar is established, to improve the accuracy of the traditional equivalent circuit method. The mathematical expression, and its end verification condition, are presented. Based on the analytical method and finite element method, the leakage permeance calculation of a PM bar in an open magnetic circuit is investigated. As an example, for a given certain type of PM bar, the magnetic flux of each section is validated by experiment, and by simulation. This model offers a foundation for building a high accuracy equivalent magnetic PM model in an electromagnetic system.

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Nonlinear Equivalent Magnetic Circuit Analysis for Linear Flux-Switching Permanent Magnet Machines

Cited by 44 publications

References 8 publications

Thrust force enhancement and ripple reduction of a sandwiched linear flux switching permanent magnet machine with segment stator for urban rail transit

Thrust force enhancement and ripple reduction of a sandwiched linear flux switching permanent magnet machine with segment stator for urban rail transit

Modeling and Analysis of Halbach Magnetized Permanent-Magnets Machine by Using Lumped Parameter Magnetic Circuit Method

A Type of Subsection Model for a Permanent Magnet Bar and its Leakage Permeance Calculation Method in an Open Magnetic Circuit

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