Research on Segmented Primary Consequent-Pole Permanent Magnet Linear Synchronous Motor with Symmetric and Periodic End Force

The end force of North-South permanent magnet linear synchronous motor (NS-PMLSM) fluctuates symmetrically with a period of one pole. Different from it, the end force’s fluctuation cycle of the consequent-pole permanent magnet linear synchronous motor (CP-PMLSM) is usually two poles and asymmetrical. Especially, within two half cycles, the end force presents complex asymmetric characteristics. In this paper, a piecewise function model of the end force of CP-PMLSM is established. Then a primary segmented design method for adjusting the period, symmetry and phase of the end force waveform is proposed. The two-segment and grouped four-segment modular distances are combined and matched to eliminate the odd-numbered harmonics of the end force and suppress the thrust ripple. A slotless primary core experimental platform and a slotted CP-PMLSM prototype are manufactured and tested to verify the theoretical analysis and simulation results.

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The Design Method for Actuators with Field Magnets of Dual Halbach Arrays

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.416-417.227 ◽

2013 ◽

Vol 416-417 ◽

pp. 227-232

Author(s):

Mimpei Morishita ◽

Takayuki Fukuda

Keyword(s):

Permanent Magnet ◽

Magnetic Circuit ◽

Design Method ◽

Algebraic Approach ◽

Synchronous Motor ◽

Air Gap ◽

Linear Synchronous Motor ◽

Halbach Arrays

The proposed magnetic circuit precisely evaluates magnetic fluxes between the field magnets of dual Halbach arrays. In the case that an actuator is configured with the dual Halback arrays and the armature coils between them, the air gap length between the dual Halbach arrays gives the maximum number of interlinkage magnetic fluxes with the armature coil through algebraic approach. The new design method is on the basis of the proposed magnetic circuit. This method makes it clear that the air gap length should be more than 1.2 times longer than the permanent magnet poles length. The utility of this design method is verified through designing cylindrical linear synchronous motor provided with the dual Halbach arrays.

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A nonlinear equivalent circuit model for flux density calculation of a permanent magnet linear synchronous motor

Serbian Journal of Electrical Engineering ◽

10.2298/sjee1503359g ◽

2015 ◽

Vol 12 (3) ◽

pp. 359-373

Author(s):

Reza Ghanaee ◽

Ahmad Darabi ◽

Arash Kioumarsi ◽

Mohammad Baghayipour ◽

Mohammad Morshed

Keyword(s):

Permanent Magnet ◽

Equivalent Circuit ◽

Analytical Method ◽

Equivalent Circuit Model ◽

Synchronous Motor ◽

Circuit Model ◽

Magnetic Equivalent Circuit ◽

Linear Synchronous Motor ◽

Proposed Model ◽

Simulation Results

In this paper, a nonlinear magnetic equivalent circuit is presented as an analytical solution method for modeling of a permanent magnet linear synchronous motor (PMLSM). The accuracy of the proposed model is verified via comparing its simulation results with those obtained by two other methods. These two are the Maxwell?s Equations based analytical method and the wellknown finite elements method (FEM). Saturation and any saliency e.g. slotting effects can be considered properly by both nonlinear magnetic equivalent circuit and FEM, where it cannot be taken into account easily by the Maxwell?s Equations based analytical approach. Accordingly, as the simulation results presented in this paper confirm, the proposed nonlinear magnetic equivalent circuit is compatible with FEM regarding the accuracy while it requires very shorter execution time. Therefore, the magnetic equivalent circuit model of the present paper can be considered as a preferable substitute for the time consuming FEM and approximated analytical method built on Maxwell?s Equations in particular when required to be applied for a design optimization problem.

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Suppressing the Thrust Ripple of the Consequent-Pole Permanent Magnet Linear Synchronous Motor by Two-Step Design

IEEE Access ◽

10.1109/access.2018.2847237 ◽

2018 ◽

Vol 6 ◽

pp. 32935-32944 ◽

Cited By ~ 7

Author(s):

Xuzhen Huang ◽

Jing Liang ◽

Bo Zhou ◽

Chengming Zhang ◽

Liyi Li ◽

...

Keyword(s):

Permanent Magnet ◽

Synchronous Motor ◽

Linear Synchronous Motor ◽

Consequent Pole

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Reducing Cogging Force of a Permanent Magnet Transverse Flux Linear Synchronous Motor

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.479-480.197 ◽

2013 ◽

Vol 479-480 ◽

pp. 197-201 ◽

Cited By ~ 1

Author(s):

Wan Tsun Tseng ◽

Chen Nan Kuo

Keyword(s):

Permanent Magnet ◽

Synchronous Motor ◽

Parameter Method ◽

Element Analysis ◽

Linear Synchronous Motor ◽

Tooth Width ◽

New Type ◽

Core Sets ◽

Simulation Results ◽

Transverse Flux

This paper presents means to minimize the cogging force of a new type of permanent magnet excited transverse flux linear synchronous motor (PMTFLSM). The translator of this linear motor consists of cross-shaped core sets. Varying the parameters of air gap length, magnet dimensions, pole pitch and tooth width of the translator, the cogging force of the PMTFLSM will be analyzed. Taguchi's parameter method including 2D finite element analysis (FEM) is employed to minimize the cogging force. Analytical and simulation results indicate the usefulness of our approach in practice

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Research on LSM with Permanent Magnet Halbach and Ironless Coil for Magnetic Levitation Vehicles

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.701-702.753 ◽

2014 ◽

Vol 701-702 ◽

pp. 753-756 ◽

Cited By ~ 2

Author(s):

Xiao Zhang ◽

Jun Yong Lu ◽

Xin Lin Long

Keyword(s):

Permanent Magnet ◽

Basic Principle ◽

Magnetic Levitation ◽

Design Method ◽

Synchronous Motor ◽

Propulsion System ◽

Linear Synchronous Motor ◽

Halbach Array ◽

Optimal Value ◽

Propulsion Force

In this paper, a kind of Linear Synchronous Motor (LSM) with Permanent Magnet (PM) arranged in Halbach array and IronLess Coil (PMH&ILC) is presented for Magnetic Levitation Vehicles (Maglev). First, the propulsion force of this kind of LSM is deduced analytically. Then, the influences of pole spacing, the current in the coil, the width of the motor and the size of the Halbach array on the propulsion force are analyzed mathematically in detail. Based on the results, the design method and basic principle of PMH&ILC-typed LSM are proposed, which shows a better performance with small pole spacing, higher permanent magnet array, optimal value of the width of the permanent magnet Halbach and so on. Finally, a sample LSM system is designed according to the requirements of Maglev propulsion system.

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Electromagnetic Design of Toroidal Permanent Magnet Linear Synchronous Motor

IEEE Access ◽

10.1109/access.2021.3095912 ◽

2021 ◽

pp. 1-1

Author(s):

Yinhao Mao ◽

Zhaolong Sun ◽

Weichang Zhou ◽

Zhexin Zhuang ◽

Hanning Qian

Keyword(s):

Permanent Magnet ◽

Synchronous Motor ◽

Electromagnetic Design ◽

Linear Synchronous Motor

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A novel tubular permanent magnet linear synchronous motor used for elevator door

10.1109/icems12746.2007.4412194 ◽

2007 ◽

Author(s):

Xiao Liu ◽

Yunyue Ye ◽

Zhuo Zheng ◽

Qinfen Lu

Keyword(s):

Permanent Magnet ◽

Synchronous Motor ◽

Linear Synchronous Motor ◽

Elevator Door

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Research on the End Effect Detent Force Reduction of Permanent Magnet Linear Synchronous Motor with Auxiliary Poles One-Piece Structure

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.416-417.27 ◽

2013 ◽

Vol 416-417 ◽

pp. 27-32

Author(s):

He Zhang ◽

Bao Quan Kou ◽

Shou Lun Guo ◽

Hai Lin Zhang ◽

Yin Xi Jin ◽

...

Keyword(s):

Permanent Magnet ◽

Synchronous Motor ◽

Linear Motor ◽

End Effect ◽

Detent Force ◽

Linear Synchronous Motor ◽

Force Reduction ◽

The One

In order to minimize the detent force of permanent magnet linear synchronous motor (PMLSM) caused by end effect, a novel auxiliary poles one-piece structure is proposed. Two auxiliary poles are extended directly from two ends of the armature core. And magnetic isolation bridges are set between auxiliary pole and armature core. Compared with the conventional discrete auxiliary poles, the one-piece structure will reduce the manufacture difficulty of PMLSM with auxiliary poles and improve the reliability of linear motor.

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