• Title/Summary/Keyword: Driving Part

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Development of IPM(Intelligent Power Module) IGBT switch performance evaluation system for the driving of the A.C. motor (교류 전동기 구동을 위한 IPM(Intelligent Power Module) IGBT 스위치 성능 분석 방법 개발)

  • Choi, Jung-Keyng
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
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    • v.15 no.4
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    • pp.291-297
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    • 2022
  • This Paper is about the study that design performance and reliability measurement circuits of the IPM which is an intelligent switching switch module included at an inverter circuits for driving of A.C. Servo motors in home appliance. IPM is a core device of motor driver and it's switching characteristics should be retained uniformly during the driving of a servo system. All of it's specification, the collector emitter switch on voltage Vce(on) spec. is very important. As the IPM are core part of inverters and producing from several brands and versions, for optimal performances of application systems a method and measurement & evaluation system to measure Vce(on) value, collector emitter switch on voltage, of the IPM IGBT switches with various brands are required. Especially, the proposed method can measure and evaluate Vce(on) values of IPM with load at mounting state on the motor driving circuits and proposed measurement & evaluation system can be important instrument systems for IPM user companies.

A method for automatically generating a route consisting of line segments and arcs for autonomous vehicle driving test (자율이동체의 주행 시험을 위한 선분과 원호로 이루어진 경로 자동 생성 방법)

  • Se-Hyoung Cho
    • Journal of IKEEE
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    • v.27 no.1
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    • pp.1-11
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    • 2023
  • Path driving tests are necessary for the development of self-driving cars or robots. These tests are being conducted in simulation as well as real environments. In particular, for development using reinforcement learning and deep learning, development through simulators is also being carried out when data of various environments are needed. To this end, it is necessary to utilize not only manually designed paths but also various randomly and automatically designed paths. This test site design can be used for actual construction and manufacturing. In this paper, we introduce a method for randomly generating a driving test path consisting of a combination of arcs and segments. This consists of a method of determining whether there is a collision by obtaining the distance between an arc and a line segment, and an algorithm that deletes part of the path and recreates an appropriate path if it is impossible to continue the path.

Strength and Fatigue Analysis of Universal Joint (유니버설조인트의 강도 및 피로 해석)

  • Cho, Jae-Ung;Han, Moon-Sik
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.20 no.4
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    • pp.427-433
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    • 2011
  • Chassis part in automotive body is affected by fatigue load at driving on the ground. Universal joint on this part is influenced extremely by the fatigue load. Fatigue life, damage and natural frequency are analyzed at universal joint under nonuniform fatigue load. The york part at universal joint is shown with the maximum equivalent stress and displacement of 60.755 MPa and 0.21086 mm as strength analysis. The possible life in use in case of 'SAE bracket' is the shortest among the fatigue loading lives of 'SAE bracket', 'SAE transmission' and 'Sine Wave'. The damage at loading life of 'SAE transmission' is the least among 3 types. The frequency of damage in case of 'Sine Wave' is 0.7 with the least among 3 fatigue loading life types but this case brings the most possible damage as 80% at the average stress of 0. Natural vibration at this model is analyzed with the orders of 1'st to 5'th and maximum frequency is shown as 701.73 Hz at 5'th order. As the result of this study is applied by the universal joint on chassis part, the prevention on fatigue damage in automotive body and its durability are predicted.

Development of OHS System Driven by Linear Motor for Automatic Transfer of LCD Panels (선형전동기를 적용한 LCD 패널 자동반송용 순환궤도차량 시스템 개발)

  • Kim, Won-Gon;Yun, Jong-Bo;Park, Gun-Woo;Hwang, Gye-Ho
    • Journal of the Semiconductor & Display Technology
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    • v.7 no.3
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    • pp.11-16
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    • 2008
  • The authors investigated an overhead shuttle (OHS) system for automatic transferring the liquid crystal display (LCD) panels. The constructed tracks of OHS system include the linear and curve regions and have been installed on the ceiling to transfer the cassette of LCD glass along the closed-loop and open-loop tracks. In this study, the OHS system was implemented by a proposed linear motor to solve encoder installation and the system cost problems of the long distance transfer system. In addition, we utilized a new algorithm of the position detection and a new control algorithm for driving linear motor. The newly developed control algorithm was demonstrated from both a computer simulation and an experimentation, indicating that the highly reliable and speedy transfer system can enhance the LCD panel productivity of commercial OHS system.

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Optimum Design of the Mover for LMTT considering the Elastic Characteristic of the Linear Motor (리니어 모터의 전기적 특성을 고려한 LMTT용 이동체의 최적설계)

  • An T.W.;Han K.J.;Han D.S.;Lee S.W.;Lee K.M.;Lee J.M.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2006.05a
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    • pp.399-400
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    • 2006
  • LMTT(Linear Motor based Transfer Technology) is a new type of transfer system used in the maritime container terminal fur the port automation, and largely consists of a controller, shuttle car, and rail. The shuttle car is divided into the frame part, the driving part, and wheels. In order to design this system, various researches on each part of it must be conducted. In this study, we dealt with the optimum design for the frame part of the shuttle car designed from previous studies on the strength of the frame with respect to the number of cross beams to minimize the weight of the shuttle car and to satisfy design criteria of cargo-handling systems in container terminal. For the optimization of the frame, thicknesses of each beam were adopted as design variables, the weight of the frame as objective function, and stress and deflection per unit length as constraint condition.

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Design of VCM(Voice Coil Motor) for Nanoindenter (나노인덴터용 보이스코일 모터 설계)

  • Cho, J.H.;Kwon, B.I.;Woo, K.I.;Jun, H.D.
    • Proceedings of the KIEE Conference
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    • 2002.07b
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    • pp.577-579
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    • 2002
  • Propose of this paper is VCM (voice coil motor) design for application of Nanoindenter, which enable control of extremely small force and displacement. This paper present the VCM shape to produce a very small force by the difference of flux density of lower part from higher one. In wide range of current. VCM produces linear driving force and operate on regular thrust having maximum displacement(100um) was practiced.

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Development of Panel Part in Flight Simulator based on PC (PC 기반의 항공기 시뮬레이터 패널부분 개발)

  • 이준우;채상원;이칠기
    • Journal of the Korea Society for Simulation
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    • v.10 no.4
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    • pp.31-40
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    • 2001
  • The flight simulator should be made like a actual flight. For the scene of sight, instrument should show the condition of flight and the pilot should catch the altitude, speed, pose and rate of lift of the airplane. This paper describes visual training program of driving airplane in practice. It is for beginners using joystick in PC, implements airplane physical equations. Flight simulator in it implements airplane panel parts in order to make simple modeling, And it uses rendering technology to implement vision parts of panel. It uses double buffering In make it faster and more efficient..

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Characteristic Analysis of Vibration in Finishing Mill (열연 사상압연기 진동 특성 분석에 관한 연구)

  • Shin, N.H.;Son, B.H.
    • Proceedings of the KSME Conference
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    • 2001.06b
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    • pp.578-583
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    • 2001
  • Chattering phenomenon is an abrupt relative vibration between the strip and rolls of rolling machine in working. It inevitably results from the progress of the degeneration in the mill facilities. This research was carried out in order to analyze the characteristic and find the cause of chatter mark in finishing mill and it was founded that major causes are facility character of driving part and special condition in case of excessive roll force.

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Transflective Dual Operating Mode Liquid Crystal Display with Wideband Configuration

  • Lee, Joong-Ha;Kim, Tae-Hyung;Yoon, Tae-Hoon;Kim, Jae-Chang;Jhun, Chul-Gyu;Kwon, Soon-Bum
    • Journal of the Optical Society of Korea
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    • v.14 no.3
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    • pp.260-265
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    • 2010
  • This paper proposes a transflective configuration of the dual operating mode liquid crystal display, which has transmissive dynamic and reflective memory parts in its pixel. By employing a wideband structure and optimizing the cell-gap of the liquid crystal layer, the reflective memory part shows a very low reflectance in the dark state, good dispersion properties for the entire visible range, as well as high reflectance in the bright state. The transmissive dynamic part is designed to have the same cell-gap and rubbing direction as those of the reflective part. The driving voltage of the dynamic part and transmittance of the bright state can also be controlled by using compensation film with a positive a-plate, which can compensate the reflective part. Experimental results in the memory part operation demonstrate that the contrast ratio is over 50:1 and the reflectance in the dark state is reduced to 56% on average of that of the conventional dual mode configuration for the entire visible range. The contrast ratio of the dynamic part is 300:1.