Analysis of the reduction of detent force in a permanent magnet linear synchronous motor

Yoshimura, Takehiro; Kim, H.J.; Watada, Masaya; Torii, Susumu; Ebihara, Daiki

doi:10.1109/20.489752

Cited by 53 publications

(24 citation statements)

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“…Nevertheless, lower thrust ripple is another important parameter, which influences the starting characteristic and the smoothness of thrust. Various methods are used to increase the thrust density and reduce the thrust ripple and cogging force [5][6]. Recently, the slotless TLM, which has long effective air gap, is getting more attention, because it can work with low thrust ripple and with a wide current range due to the little armature reaction.…”

Section: Introductionmentioning

confidence: 99%

Investigation of interior axially magnetized permanent magnet tubular linear machine used for electromagnetic launcher

Zhao

Chen

Liu

et al. 2012

2012 16th International Symposium on Electromagnetic Launch Technology

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Due to high winding utilization ratio, high thrust density, zero transverse end effect, and zero unilateral magnetic force, tubular linear machine (TLM) is a very suitable candidate for electromagnetic launcher. In this paper, two kinds of interior axially magnetized permanent magnet TLMs with and without slots are compared and evaluated with finite element method (FEM) from the aspects of magnetic field, thrust characteristic, thrust density, cogging force, and so on. It is shown that the slotted TLM has higher electromagnetic performance and thrust density, which is an important merit for the electromagnetic launcher. Then the slotted TLM is investigated more deeply by FEM. The material selection and structure optimization are researched to improve the electromagnetic performance. The thrust characteristic is much improved after optimization.

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Section: Introductionmentioning

confidence: 99%

Investigation of interior axially magnetized permanent magnet tubular linear machine used for electromagnetic launcher

Zhao

Chen

Liu

et al. 2012

2012 16th International Symposium on Electromagnetic Launch Technology

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show abstract

“…There are two different techniques to reduce the detent force for the PMLSM. One technique is to choose an optimal constructive design, taking into account the width and the arrangement of the PM, and the length and the shape of the solid iron core [2], [3]. This technique is complex and costs too much in making a PMLSM, sometimes it is also difficult to manufacture as designed, and usually more than 10 [N] detent force is remained.…”

Section: Introductionmentioning

confidence: 99%

Detent force suppression for permanent-magnet linear synchronous motor utilizing feed-forward control method

Zhu

Cho

2009

2009 8th International Symposium on Advanced Electromechanical Motion Systems &Amp; Electric Drives Joint Symposium

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The detent force of the permanent-magnet linear synchronous motor (PMLSM) is caused by the interaction between the permanent magnet and the iron core of the mover without input current. It is a function of the mover position relative to the stator. This paper proposes a control based method to reduce the detent force for the PMLSM. This detent force that can be predicted by finite element method is compensated by injecting the instantaneous current using field-oriented control method. Both the simulated and the experimental results are reported to validate the effectiveness of this proposed method.

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“…According to the design principles of surface mounted PM synchronous motors [7][8], a series of parameters discussion are studied. Thrust force-current density relation and peak-topeak of thrust force fluctuation-current density relation with different mover tooth width and different stator tooth width are studied.…”

Section: Introductionmentioning

confidence: 99%

Performance investigation of multi-tooth flux-switching PM linear motor

Cai

Jin

et al. 2011

2011 International Conference on Electrical Machines and Systems

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magnet (FSPM) linear motor are analyzed and compared with those of the conventional FSPM linear motor. Optimal parameters of both stator and mover teeth are further discussed focusing on thrust ripple and thrust force. Finally, performance comparisons between two FSPM linear motors with different end shapes are made. It is found that the structure with two-tooth end is more desirable. It shows that the FSPM linear motor with multi-tooth structure can not only decrease half number of permanent magnets, but also output high thrust force at low current density with small thrust ripple.

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Analysis of the reduction of detent force in a permanent magnet linear synchronous motor

Cited by 53 publications

References 0 publications

Investigation of interior axially magnetized permanent magnet tubular linear machine used for electromagnetic launcher

Investigation of interior axially magnetized permanent magnet tubular linear machine used for electromagnetic launcher

Detent force suppression for permanent-magnet linear synchronous motor utilizing feed-forward control method

Performance investigation of multi-tooth flux-switching PM linear motor

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