• Title/Summary/Keyword: Inserted Core Type Slotless PMLSM

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Shape Design of Slotless Type PMLSM for Improving Thrust Density (Slotless 영구자석형 선형 동기전동기의 고추력화를 위한 형상 설계)

  • 김용철;김규탁
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.52 no.7
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    • pp.320-326
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    • 2003
  • Slotless Permanent Magnet Linear Synchronous Motor (PMLSM) has good control ability but thrust density is low. So, this paper proposes inserted core type of slotless PMLSM to improve its thrust density. Inserting the core between windings of each phase, detent force is generated by the difference of magnetic resistance in an air gap. To minimize detent force, this paper applies the neural network to inserted core type of slotless PMLSM. The, Magnetic pole ratio, the width of the inserted core and the width of the coil are selected as a design parameter to minimize detent force. In comparison with inserted core type one, thrust ripple greatly decreases by minimizing detent force and also thrust increases in this optimal model.

Optimal Design for Thrust and Detent Force in Inserted Core Type Slotless PMLSM with Consideration of End Effect (단부효과를 고려한 철심 삽입형 Slotless PMLSM의 추력 및 디텐트력 최적화 설계)

  • 김미용;김규탁
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.53 no.9
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    • pp.525-531
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    • 2004
  • This paper proposes inserted core type of slotless Permanent Magnet Linear Synchronous Motor(PMLSM) to improve its low thrust density. However, by inserting the core between windings of each phase, detent force is generated and it acts as thrust ripple. Furthermore, linear motors generate end effect making thrust ripple. So, this paper applies the neural network to minimize detent force and to maximize thrust. Also, sub-poles is placed at the end parts of the mover to compensate end effect. To confirm of calculation method's validity, the calculated results are compared with experimental results.

Optimum design of slotless PMLSM by using multiobjective function neural network (다중목적함수 신경 회로망을 이용한 slotless PMLSM의 최적 설계)

  • Kim, Mi-Yong;Lee, Dong-Yeup;Jung, Chun-Gil;Kim, Gyu-Tak
    • Proceedings of the KIEE Conference
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    • 2003.07b
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    • pp.855-857
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    • 2003
  • A slotless Permanent Magnet Linear Synchronous Motor (PMLSM) has good control ability but thrust density is low. So, this paper proposes inserted core type of slotless PMLSM to improve its low thrust density. Inserting the core between windings of each phase, detent force is generated by the difference of magnetic resistance in an air gap. To minimize detent force and maxize thrust, this paper applies the neural network to inserted core type of slotless PMLSM.

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Detent force minimization caused by end effect of moving magnet type Slotless PMLSM (Moving magnet type Slotless PMLSM의 end effect에 의한 detent force 최소화)

  • Kim, Mi-Yong;Ha, Tae-Wook;Jung, Chun-Gil;Kim, Gyu-Tak
    • Proceedings of the KIEE Conference
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    • 2003.10b
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    • pp.33-35
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    • 2003
  • This paper proposes inserted core type of slotless Permanent Magnet Linear Synchronous Motor(PMLSM) to improve its low thrust density. However, by inserting the core between windings of each phase, detent force is generated. Furthermore, linear motors have the feature of structurally limited length. So, it causes the end-effect in actual operation. So, this paper applies the neural network to this model to minimize detent force and maximize thrust. Also, sub-poles used the to the end parts of the mover for compensating the end-effect.

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