• Title/Summary/Keyword: mover

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Dynamic Characteristic Analysis of Permanent Magnet Type Linear Synchronous Motor using FEM (유한요소법을 이용한 영구자석형 선형동기전동기의 동특성해석에 관한 연구)

  • Shim, Jang-Ho;Jung, In-Soung;Yoon, Sang-Baeck;Hyun, Dong-Seok
    • Proceedings of the KIEE Conference
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    • 1997.07a
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    • pp.165-167
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    • 1997
  • This paper centers on a method which can reduce calculating time and maintain accuracy of whole model FE analysis with one pole model for short secondary Permanent Magnet Linear Synchronous Motor(PMLSM). We use one pole model which considers the number of pole of stator and mover respectively in order to replace whole model to one pole model and calculate flux linkage and back e.m.f. with accuracy. Also we verify the validity of proposed method with comparision of results of whole and one pole model.

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A Study for the Equivalent Circuit of Linear Pulse Motor (리니어펄스모터의 등가회로에 관한 연구)

  • Kim, Sung-Do;Kim, Jung-Chul;Im, Tae-Bin;Cho, Yun-Hyun
    • Proceedings of the KIEE Conference
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    • 1997.07a
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    • pp.184-186
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    • 1997
  • This paper proposes the analysis method considered the eddy current which is induced by the speed of LPM. To investigate reduction effect of thrust due to the eddy current, the magnetic equivalent circuit of LPM is modeled and its characteristics is analyzed according to the displacement of mover with the speed term when LPM is driven by the input of unit step and microstep.

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A Study on Innovative Corporate Culture Analysis of Global Content Company Google: Focusing on 7S Model (글로벌 콘텐츠 기업 구글의 혁신적 기업문화 분석: 7S 모델 중심으로)

  • Lee, Junghwan;Han, Eoksoo;Jeong, Synyoung
    • Proceedings of the Korea Contents Association Conference
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    • 2016.05a
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    • pp.431-432
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    • 2016
  • 많은 기업에서 기업문화(Corporate Culture)를 개선하는 노력을 진행하고 있다. 그 동안 기업문화라고 하면 회사 내 임직원의 사고방식이나 행동에 영향을 주는 단순한 분위기 정도로 인식되었지만, 이제는 시대에 맞지 않는 기업문화가 기업 성장에 걸림돌로 작용할 만큼 중요한 부분이 되고 있다. 이와 같은 변화 가운데 본 연구는 창의와 혁신의 경쟁 시대에 보다 바람직한 기업문화 개선을 위해 글로벌 콘텐츠 기업 구글의 혁신적인 기업문화에 대해서 분석하였다. 특히 다양한 사례를 조사하는 과정에서 본 연구는 기업문화 분석 Frame이 되는 7S 모델을 활용하여 Strategy, Skill, Shared Value, Structure, System, Staff, Style 관점에서 조직의 내부 특성을 분석하였다. 본 연구를 통해 글로벌 콘텐츠 기업의 차별적 경쟁력을 배우고 이를 바탕으로 국내 기업이 기술적 역량을 강화하고 시장을 개척해나가는 선도자(First Mover)로 변화하는 기업문화 개선이 있기를 기대해 본다. 자사의 기업문화(Corporate Culture)를 개선하기 위한 노력을 진행하고 있다.

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SSF: Sentence Similar Function Based on word2vector Similar Elements

  • Yuan, Xinpan;Wang, Songlin;Wan, Lanjun;Zhang, Chengyuan
    • Journal of Information Processing Systems
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    • v.15 no.6
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    • pp.1503-1516
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    • 2019
  • In this paper, to improve the accuracy of long sentence similarity calculation, we proposed a sentence similarity calculation method based on a system similarity function. The algorithm uses word2vector as the system elements to calculate the sentence similarity. The higher accuracy of our algorithm is derived from two characteristics: one is the negative effect of penalty item, and the other is that sentence similar function (SSF) based on word2vector similar elements doesn't satisfy the exchange rule. In later studies, we found the time complexity of our algorithm depends on the process of calculating similar elements, so we build an index of potentially similar elements when training the word vector process. Finally, the experimental results show that our algorithm has higher accuracy than the word mover's distance (WMD), and has the least query time of three calculation methods of SSF.

The Diesel Engine and the Environment - Noise

  • Bryndum, Lars
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2003.05a
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    • pp.37-45
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    • 2003
  • The diesel engines was invented a little more than one hundred years ago and has ever since been developed for better fuel economy, increased power and smaller size. Thanks to its fuel economy, the diesel engine is today the dominating prime mover in many applications, such as smaller power plants, commercial ships, trains, trucks, buses and all kinds of mobile construction machinery. As engine for passenger cars, the diesel engine is steadily increasing its share of the market. However, its versatility and, consequently, large prevalence have led to environmental demands to its exhaust emissions, noise and vibration. This paper deals with the noise aspects of diesel engine designs of the so-called low speed two-stroke type installed in most large ships.

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Study on the Application of Personal Rapid Transit System (궤도 승용차 시스템의 적용 검토)

  • 최재혁
    • Proceedings of the KSR Conference
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    • 1998.05a
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    • pp.31-38
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    • 1998
  • Guideway Transportation will provide the break-through to solve the traffic problems, which a lot of big cities have over the world. APM (Automated People Mover) system, Guideway Transportation, is classified by PRT, GRT, and MRT according to the capacity of passenger to be carried by its system. In the Application of PRT (Personal Rapid Transit) system, the enact analysis of the traffic problem on the area to be applied should be preceded. PRT system is characterized by Off-Line and Demand Operation. The Network of PRT system depends on the Load Time and Load Pattern. The operation of PRT system will have move efficient way when it is applied to the network with evenly distributed Load Time and Load Pattern.

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Integrated Driver for the Full Rotation Using Six-axial Forces by the Induction Type of Axial-gap Motor (유도형 축방향 모터의 6축력 제어를 이용한 대회전 구현용 통합 구동기)

  • Jung Kwang-Suk;Lee Sang-Heon
    • Journal of Institute of Control, Robotics and Systems
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    • v.12 no.8
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    • pp.798-804
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    • 2006
  • To overcome the limited relative uncertainty and work range of the existing planar stage and the bulk structure of the contact-less motor for rotation, the novel operating principle to realize the precise rotation is suggested. It uses the two-axial vector forces, normal force and thrust force, of three-induction type of axial motors located $120^{\circ}$ apart, resulting in the contact-free rotation of the mover. Firstly in this paper, the magnetic forces across the air gap are modeled and simulated under the various conditions. It clarifies the feasible range of the derived solution. And the algorithm compensating the strong cross couple between the forces and the control inputs; generally AC magnitude and slip frequency, is given to realize the independent control of six axes. Finally, for the successfully implemented system, the round test and the micro step test results are given.

Inductance and Push/pull Effects of Moving Coil Type LOA with Consideration of a Mover Positions (가동자 위치에 따른 가동코일형 LOA의 인덕턴스 변화와 Push/pull 효과)

  • Jang, S.M.;Jeong, S.S.;Kweon, C.;Moon, S.J.;Jung, T.Y.
    • Proceedings of the KIEE Conference
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    • 2000.07b
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    • pp.900-902
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    • 2000
  • A moving-coil-type linear oscillatory actuator is consisted of the NdFeB permanent magnets with high specific energy as the stator, a coil-wrapped nonmagnetic hollow rectangular structure and an iron core as a pathway for magnetic flux. The inductance of moving coil and the push/pull effect is obtained from the permeance model of LOA with the open magnetic circuit. The analytical method are verified using the 2D finite element method.

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Drive characteristics of moving primary LSRM according to position detection angle (가동 1차측 LSRM의 위치 검출각에 따른 운전 특성)

  • Jang, Seok-Myeong;Park, Ji-Hoon;You, Dae-Joon;Cho, Han-Wook;Choi, Jang-Young
    • Proceedings of the KIEE Conference
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    • 2005.04a
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    • pp.99-101
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    • 2005
  • This paper deals with drive characteristics of LSRM according to position detection angle. Position of LSRM detected approximation sensor. Position choose mover of LSRM and inductance. When approved current in each phase by decided position, we made sure current and voltage according to turn-on, turn-off.

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A New Moving-magnet Type Linear Actuator utilizing Flux Concentration Permanent Magnet Arrangement

  • Goto, Akira;Okamoto, Takuya;Ikariga, Atsushi;Todaka, Takashi;Enokizono, Masato
    • Journal of Electrical Engineering and Technology
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    • v.7 no.3
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    • pp.342-348
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    • 2012
  • This paper presents a moving-magnet type linear actuator designed by using flux concentration type permanent magnet arrangement, which can generate higher magnetic flux density in air-gap. In this construction, detent force which is induced by both slot-effect and end-effect becomes larger due to strong attractive forces. To reduce cogging force we have employed a modular mover structure of two magnetic pole sections connected with a center yoke. The improved motor performance is demonstrated with the prototype machine.