Optimal Design of Auxiliary Teeth to Minimize Unbalanced Phase Due to End Effect of PMLSM

Jang, Ki-Bong; Kim, Jeehyun; An, Ho-Jin; Kim, Gyu-Tak

doi:10.1109/tmag.2010.2091261

Cited by 28 publications

(17 citation statements)

References 3 publications

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“…The result shows that without optimization, the detent force caused by the end effect is much higher than that caused by the slot effect. The ways to reduce the detent force can be classified into two kinds, one is the sophisticated control strategies of the machines [13][14][15][16], and the other is the optimization of the machine structure [17][18][19][20][21][22][23][24][25], as shown in Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

“…[19] developed a multiple secondary side PMLSM to reduce the detent force, while [20] developed a multiple primary side PMLSM to reduce the detent force. Auxiliary poles or auxiliary teeth are also widely used to reduce the detent force [21][22][23][24]. [25] adopted a complex structure that the PMLSM was divided into three modules, so the detent force of the three modules can be cancelled by each other.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Detent Force Reduction of an Arc-Linear Permanent-Magnet Synchronous Motor by Using Compensation Windings

Zhao

Liu

et al. 2017

IEEE Trans. Ind. Electron.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Detent Force Reduction of an Arc-Linear Permanent-Magnet Synchronous Motor by Using Compensation Windings

Zhao

Liu

et al. 2017

IEEE Trans. Ind. Electron.

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“…Therefore, direct-drive actuators are naturally considered to be suitable for high speed, high precision and high dynamic applications [1], [2]. Among different types of linear motors, PMLSMs have advantages of high force density, rapid dynamic response, and low thermal losses [3], [4], and hence many researchers have focused on the study of PMLSMs.…”

Section: Introductionmentioning

confidence: 99%

Detent Force Compensation for PMLSM Systems Based on Structural Design and Control Method Combination

Wang

Pan

2015

IEEE Trans. Ind. Electron.

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Abstract-As direct-drive actuators, permanent magnet linear synchronous motors (PMLSMs) are widely used in high velocity and high precision applications. The detent force, however, can deteriorate the performance, even excite the mechanical resonance. This paper focuses on a novel detent force compensation scheme for PMLSM systems through a combination of structural design and control method. First, due to the bandwidth constraint of the control system, eliminating high frequency ripples is unfeasible; skewed permanent magnets (PM) considering an optimal skewing length are designed to suppress high order harmonic components. Second, based on the model of PMLSM with skewed PMs, a linearization observer is derived and applied independently to the velocity controller for further diminishing low order harmonic components. To facilitate implementation in the digital control system, a discretization method taking account of estimated errors is designed. Through the online calculation, the estimated detent force is injected to the control system in a feedforward way. To tune the proposed scheme properly, the convergence of the algorithm is analyzed by utilizing Lyapunov stability theory. Simulation studies are performed to prove the effectiveness of the proposed method, and experiments are provided to confirm the theoretical analysis and simulation results.Index Terms-Permanent magnet linear synchronous motors (PMLSMs), detent force, skewed permanent magnet, discretetime linearization observer, stability analysis.

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“…The detent force has been minimized by adopting the methods such as adjusting the length of armature core and width of permanent magnet (PM) and teeth, skewing PM and introducing exterior teeth, changing the shape of PM and iron cores [2,3]. These methods, however, are known to increase the complexity or to distort the flux distribution, sometimes it decreases the average thrust force.…”

Section: Introductionmentioning

confidence: 99%

Optimal design of short-armature slotted type multi-segment permanent magnet linear synchronous motor for numerically controlled machine tool

Yang

2015

International Journal of Applied Electromagnetics and Mechanics

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The severe drawback of slotted permanent magnet linear synchronous motor (PMLSM) is the detent force, particularly when accurate positioning and constant low speed is required for numerically controlled machine tool. In this paper, a novel short-armature slotted type multi-segment permanent magnet linear synchronous motor (MSPMLSM) is proposed and constructed to reduce the detent force. It consists of a proper shift of the multiple segments of iron core relative to the PMs. The detent forces of MSPMLSMs with different number of segment are analyzed and simulated by finite element method (FEM). The proposed structure has been proved to be a very effective approach for the reduction of detent force. Then this paper presents the statistical and mathematical optimum design of a 3-segment PMLSM using response surface methodology (RSM) together with FEM to minimize the detent force. Full factorial design and steepest ascent method, one of the iterative search method, is proposed to establish optimal design area for applying RSM. Finally, the global optimal design is predicted and the optimally designed one is manufactured, and the numerical results and measured results are reported to validate the effectiveness of this proposed method.

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Optimal Design of Auxiliary Teeth to Minimize Unbalanced Phase Due to End Effect of PMLSM

Cited by 28 publications

References 3 publications

Detent Force Reduction of an Arc-Linear Permanent-Magnet Synchronous Motor by Using Compensation Windings

Detent Force Reduction of an Arc-Linear Permanent-Magnet Synchronous Motor by Using Compensation Windings

Detent Force Compensation for PMLSM Systems Based on Structural Design and Control Method Combination

Optimal design of short-armature slotted type multi-segment permanent magnet linear synchronous motor for numerically controlled machine tool

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