• Title, Summary, Keyword: PMLSM

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Parameter Estimation and Performance Analysis of Permanent Magnet Linear Synchronous Motor (영구자석 선형동기전동기의 파라메터 산정 및 특성해석)

  • Lim, Ki-Chae;Woo, Joon-Keun;Hong, Jung-Pyo;Kim, Gyu-Tak
    • Proceedings of the KIEE Conference
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    • pp.148-150
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    • 1999
  • This paper deals with characteristic analysis of Permanent Magnet Linear Synchronous Motor(PMLSM). Parameters and characteristic variations are evaluated by using Finite Element Method (FEM) and Equivalent Magnetizing Current Method. PMLSM can be classified into the short primary type PMLSM and the short secondary type PMLSM according to their structural features. Especially, the short secondary type PMLSM is focused on because of good control characteristics. And this paper presents the difference of analysis results between the short primary type PMLSM and short secondary type PMLSM and investigates the end effect of two PMLSM's.

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Optimal Design of Permanent Magnet Linear Synchronous Motor(PMLSM) Considering Multiple Response by Response Surface Methodology(RSM) (영구자석 선형 동기전동기(PMLSM)의 반응표면법(RSM)을 이용한 다중 반응 최적설계)

  • Kim Sung-Il;Nam Hyuk;Kim Young-Kyoun;Hong Jung-Pyo;Cho Han-Ik
    • Proceedings of the KIEE Conference
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    • pp.1097-1099
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    • 2004
  • This paper deals with the optimal design of a slotless type of permanent magnet linear synchronous motor (PMLSM). Response surface methodology, one of the optimization methods, is used to consider multiple response of the PMLSM. That is, it is applied to obtain more average thrust and less thrust ripple than prototype PMLSM. To analyze quickly, characteristic analysis of the PMLSM is performed by space harmonic method and final results of optimized PMLSM are compare with those of prototype PMLSM through finite element analysis.

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Research on Design Characteristics of Steel-Cored PMLSM with High Thrust Force Considering Running Condition (고추력용 철심형 영구자석 선형동기전동기의 운전조건을 고려한 설계)

  • Jung, Sang-Yong
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.21 no.6
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    • pp.85-93
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    • 2007
  • This paper presents the design characteristics and strategies applied for steel-cored PMLSM(Permanent Magnet Linear Synchronous Motor) considering the running conditions. Particularly, optimal design consideration on steel-cored PMLSM for short reciprocating trajectory using dynamic capability and dynamic constraints has been performed. Furthermore, thermal aspects, detent force, and magnetic saturation in design of steel-cored PMLSM have been investigated.

Comparison of two types of Permanent Magnet Linear Synchronous Motor with the Minimum Detent Force

  • Jang, Seok-Myeong;Lee, Sung-Ho;Yoon, In-Ki
    • KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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    • v.11B no.4
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    • pp.146-150
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    • 2001
  • Comparison on the performances between the Halbach array type permanent magnet linear synchronous motor (HA-PMLSM) and the convensional array type permanent magnet linear synchronous motor (CA-PMLSM) was made with finite element analysis (FEA) and experiment. The HA-PMLSM is seen to be superior to the CA-PMLSM. Optimum ratio of magnet length to slot pitch of the HA-PMLSM which reduces the detent force was determined. Also, Comparison of forces of the HA-PMLSM and the CA-PMLSM with minimum detent force is presented.

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Optimal Design of Permanent Magnet Linear Synchronous Motor for Reducing Thrust Ripple (추력 리플 저감을 위한 PMLSM의 최적설계)

  • Kim S.I.;Hong J.P.;Cho H.I.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.265-268
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    • 2005
  • This paper deals with the optimal design of a permanent magnet linear synchronous motor (PMLSM) with the analysis of prototype PMLSM. In the PMLSM, thrust ripple is one of the causes disturbing high-precision position control. Therefore, Response surface methodology (RSM), one of the optimization methods, is applied to obtain the shape decreasing thrust ripple of the prototype PMLSM. In the end, characteristic analysis of the PMLSM is performed by space harmonic method for shortening of a computation time, and final results is verified by finite element analysis.

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Robust Position Control for PMLSM Using Friction Parameter Observer and Adaptive Recurrent Fuzzy Neural Network (마찰변수 관측기와 적응순환형 퍼지신경망을 이용한 PMLSM의 강인한 위치제어)

  • Han, Seong-Ik;Rye, Dae-Yeon;Kim, Sae-Han;Lee, Kwon-Soon
    • Journal of The Korean Society of Manufacturing Technology Engineers
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    • v.19 no.2
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    • pp.241-250
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    • 2010
  • A recurrent adaptive model-free intelligent control with a friction estimation law is proposed to enhance the positioning performance of the mover in PMLSM system. For the PMLSM with nonlinear friction and uncertainty, an adaptive recurrent fuzzy neural network(ARFNN) and compensated control law in $H_{\infty}$ performance criterion are designed to mimic a perfect control law and compensate the approximated error between ideal controller and ARFNN. Combined with friction observer to estimate nonlinear friction parameters of the LuGre model, on-line adaptive laws of the controller and observer are derived based on the Lyapunov stability criterion. To analyze the effectiveness our control scheme, some simulations for the PMLSM with nonlinear friction and uncertainty were executed.

Comparison of the magentic field and static thrust of PMLSM and LRM (PMLSM과 LRM의 정추력 및 자계특성 비교)

  • Jang, S.M.;Yoon, I.K.;Lee, S.H.;Yoon, K.K.
    • Proceedings of the KIEE Conference
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    • pp.888-890
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    • 2000
  • This paper deals with characteristic analysis of Permanent Magnet Linear Synchronous Motor(PMLSM) and Linear Reluctance Motor(LRM). PMLSM and LRM can be classified into the short primary type and the short secondary type according to their structural features. In this paper, select the short secondary. Thrust and lateral force are evaluated by using Finite Element Method(FEM) and experiments. These characteristics of PMLSM and LRM are compared with each other.

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A Study on the V-skew Model for Minimization of Detent Force and Lateral Force in PMLSM (PMLSM의 디텐트력 및 Lateral Force 최소화를 위한 V-skew 모델에 관한 연구)

  • Hwang, In-Cheol;Jang, Ki-Bong;Kim, Gyu-Tak
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.57 no.3
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    • pp.390-397
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    • 2008
  • Permanent Magnet Linear Synchronous Motor (PMLSM) has high efficiency, high energy density, and high control-ability. But, the detent force always is produced by the structure of slot-teeth. There are the disadvantages such as noise and vibration of the apparatuses are induced and the control ability is curtailed because detent force acts as thrust ripple. Therefore, the detent force reduction is an essential requirement in PMLSM. Generally, the method, skewing permanent magnet or slot-teeth, is used to reduce the detent force. But the thrust is decreased at the same time. If permanent magnet is skewed, the lateral force which operates as the perpendicular direction of skew direction is generated in linear guide of PMLSM. So, V-skew model is proposed for the reduction of lateral force. The lateral force acts as braking force in linear motion guide, and it has bad influence to the characteristics of PMLSM. However, these problems will not be solved by 2-dimensional Finite Element Analysis (FEA). So, in this paper 3-dimensional FEA is applied to analyze the PMLSM where permanent magnet is skewed and has overhang. The detent force and thrust characteristics considering skew and overhang effects of permanent magnet are analyzed by 3-dimensional FEA and the results are compared with experimental values to verify the propriety of analysis.

A Study on the Optimal Acceleration Profile to Reduce Vibration of PMLSM (PMLSM의 진동저감을 위한 최적의 속도 궤적 생성에 관한 연구)

  • Lee Dong-Yeup;Kim Gyu-Tak;Choi Young-Hyu
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.54 no.8
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    • pp.351-357
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    • 2005
  • This paper presents vibration minimization of a PMLSM driven feed-slide by using optimized smooth velocity curve with finite jerk. First of all, the PMLSM was designed and made to reduce detent force. Next, a PMLSM driven feed-slide system was mathematically modeled as a 4-degree-of-freedom lumped parameter model. The key idea of our vibration minimization method is to find out the most appropriate smooth velocity(feedrate) curve with finite jerk. The validity of our proposed method has been verified by comparing computer simulation results of the feed-slide model with experimental ones.

A Study on Auxiliary Pole Installation of Concentrated Winding PMLSM with Bifurcating of Armature Teeth (Bifurcating을 적용한 집중권 PMLSM의 보조극 설치에 관한 연구)

  • Kim, Yong-Jae
    • The Journal of the Korea institute of electronic communication sciences
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    • v.7 no.5
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    • pp.1067-1072
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    • 2012
  • Recently, linear motors have been widely researched and have been increasingly used in various industrial applications. Especially, permanent magnet linear synchronous motors(PMLSMs) have been getting the spotlight in the transportation system. A PMLSM is structurally simple and has a lot of merits such as high speed, high thrust force, etc. However, in case of a long stator system which arranges armature to the full length of transportation lines, a PMLSM has some disadvantages such as the material cost increase and long manufacturing time. Hence, in order to overcome these problems, the PMLSM with stationary discontinuous armature structure and concentrated windings was proposed. However, this method occurs undesirable cogging force by outlet edge effect. The cogging force causes thrust force ripples and generates noise and vibration. Therefore, in this paper, we proposed installation method of auxiliary pole PMLSM with concentrated winding applying bifurcating in order to reduce cogging force by the outlet edge when the armature is placed in a discontinuous arrangement. Also, we have examined characteristics of outlet edge cogging force using 2-D finite element analysis(FEA).