• 대한기계학회논문집A
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• 제27권2호
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• pp.285-293
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• 2003

This paper explores an optimal design methodology for an auto lever using a genetic algorithm. Components of the auto lever have been designed sequentially in the industry, but this study presents a novel design method to determine the design parameters of components simultaneously. The genetic algorithm approach is described to decide a set of design parameters for auto lever. The authors have attempted to model the design problem with the objective of minimizing the angle variation of detent spring subject to constraints such as modulus of elasticity of steel, geometry of shift pipe, and stiffness of spring. This method gives the promising design alternative.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.72-74
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• 2001

This paper deals with a dynamic analysis and a position control for air-core type linear synchronous motor with Halbach array (HA) permanent magnet mover. The primary coils are designed to be air-cored, so the HA-PMLSM don't exist the detent force. The secondary HA array of PMs does not require any ferro-magnetic yoke and excites stronger magnetic flux density and closer to the sinusoids than a conventional PM array.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.93-95
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• 2001

This paper describes detent force minimization techniques of Permanment Magnet Linear Synchronous Motor(PMLSM) for the improvement of control and the driver system to control the position and velocity, PMLSM are simulated by operating open-loop system and PI control system, and in actuality the control system is implemented by DSP based controller and PWM inverter to investigate the characteristics of both open-loop system and PI control system.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 B
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• pp.833-834
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• 2006

디텐트력은 철심형 영구 자석 전기기기의 구조상 피할 수 없는 기기 특성이며 원통형 선형발전기에서도 기기의 정상적인 동작을 방해하는 요인으로 작용한다. 특히 정격 외부 입력이 작은 경우 디텐트력은 기기의 성능에 크게 영향을 미칠 수 있으며 이를 저감할 수 있는 설계가 필수적이다. 본 논문에서는 여러 가지의 디텐트력 저감법 중 이동자의 극 피치 조정을 통해 디텐트력을 저감하고자 하였다. 극피치의 변화는 디텐트력 외에도 역기전력 파형에 영향을 주게 되므로, 기기의 목표 성능을 만족하기 위해서는 디텐트력과 역기전력을 함께 고려하여야 한다. 제안된 설계안은 유한요소법을 이용하여 해석되었으며 이를 통해 얻어진 결과를 고려하여 최종 모델을 도출하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.98-100
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• 2004

This paper is proposed vibration minimize method of PMLSM which is designed to minimize detent force. To minimize of vibration at acceleration discontinuous point of velocity curve, genetic algorithm is applied. The vibration characteristic is compared general trapezoid velocity curve with proposed velocity profile.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.9-11
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• 2005

영구자석형 선형발전기의 설계에 있어서 주로 고려되어야 할 사항은 영구자석, 철심형 치 및 코일의 형상 설계이다. 또한 영구자석과 철심형 치의 상호 작용에 의한 디텐트력은 기기의 안정적인 성능을 위해 저감되어야 한다. 본 논문에서는 1kW급 왕복 구동 평판형 선형 발전기의 영구자석과 치의 구조에 따른 디텐트력과 역기전력의 변화를 유한요소법을 이용하여 해석하였고, 디텐트력의 저감을 위해 다양한 구조의 영구자석과 치 형상이 적용되었다. 기기 구조의 변화는 역기전력에도 영향을 끼치므로 적용된 설계안 중 역기전력의 손실을 최소화할 수 있도록 설계안의 적절한 선택이 필요하다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.37-39
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• 2005

This paper is proposed maximum thrust design of slotted Permanent Magnet Linear Synchrous Motor (PMLSM) using surface harmonic method considering slot effect. The genetic algorithm is used for optimization. The objective functions are the maximum thrust and the minimum detent force. This time, design parameters are set as PM width, PM height and slot width.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2005년도 춘계학술대회 논문집
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• pp.97-102
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• 2005

This paper presents feed rate optimizaton of a PMLSM driven feed-slide for mininum vibrations by smoothing 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 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.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2006년도 추계학술대회 논문집
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• pp.665-674
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• 2006

This paper presents the optimal design of a high-speed (200[km/h]) Linear Synchronous Motor which will be used as a propulsion system of a dynamic tester for catenary-current collection used in railways. Motor performance, especially detent force minimization on various design schemes has been investigated in detail by using FEM (Finite Element Method). Simulation-based DOE (Design of Experiments) method is also applied in order to reduce the large number of analysis according to each design variable and consider the effect among variables. The optimal design in all aspects is proposed by an optimization algorithm using a regression equation derived from the simulation-based DOE and the performance is verified by FEM.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제54권8호
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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.