• 제목/요약/키워드: Hybrid drive

검색결과 306건 처리시간 0.027초

전자석형 리니어 하이브리드모터의 과도특성 해석 (Transient Characteristics of Electromagnet Type Linear Hybrid Motor)

  • 전혜정;전우진;이주;카미야 유우시
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2000년도 하계학술대회 논문집 B
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    • pp.879-881
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    • 2000
  • This paper treats the electromagnet type linear synchronous motor with induction operation. The proposed motor consists of the primary winding energized by variable frequency supplies and the secondary having an additional solid-conductor besides the field finding. The conductor is useful for not only the self-starting but also the damping effect In the synchronous drive. From the investigation by the experiment and the finite element analysis coupled with both electric circuit and motion equation we verify that the proposed motor is effective for practical use.

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양측식 리니어 펄스 모터의 2차원 유한요소해석 (2D Finite Element Analysis of Double-side LPM)

  • 이동주;이은웅;김성헌;김일중;김성종
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2000년도 하계학술대회 논문집 B
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    • pp.760-762
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    • 2000
  • Hybrid type LPM can be widely applied in the precise position controlled devic because precise linear motion can be directly obtained by the simple control circuit without backlash in the rotary-type stepping motor. Also, LPM can increase the Position resolution, which was limited by mechanical manufacturing limit and characteristic of magnetic material. using micro-step drive method to decrease the noise and vibration further. Especially, Double-side LPM may be replaced the solenoid as the valve driving device without difficulty and give full play to control the valve accurately. Hence, In this paper, magnetic circuit of double-side LPM was confirmed and static thrust force curve according to the relative displacement between stator and mover, was analyzed by the two dimensional finite element method. From this results, we can suppose the excitation current to be controlled optimally.

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각종 리니어펄스모터(LPM)의 자기회로와 그 특성해석 (Characteristics Analysis and Magnetic Circuits of Various Kinds Linear Pulse Motor)

  • 김일중;이은웅;김종겸
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1993년도 하계학술대회 논문집 B
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    • pp.1091-1094
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    • 1993
  • Recently, in the industrial applications, the direct drive method with linear pulse motor(LPM) has been introduced and studied for practical use. This paper describes the analysis result of hybrid(HB), permanent magnet(PM), and variable reluctance(VR) type LPM. First, calculation of the flux density distribution in the air gap at these LPM by finite element method. And by mean of Maxwell's stress tensor with above magnetic flux density, calcurated the static thrust force and normal force.

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용량성 부하 구동용 하이브리드 구동장치의 소형 DC-DC 컨버터에 관한 연구 (A Study on small DC-DC Converter of the hybrid drive system for capacitive load)

  • 조용호;김기석;박진일;홍선기
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2015년도 추계학술대회 논문집
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    • pp.83-84
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    • 2015
  • 본 논문은 용량성 부하 구동용 하이브리드 구동장치에서 사용되는 절연된 외부 소형 DC-DC 컨버터에 관한 연구이다. 외부 소형 DC-DC 컨버터는 스위칭 소자를 구동하는데 필요한 독립 전원을 공급해 준다. 기존의 제품들은 트랜스를 사용하고 절연을 위해 절연 소자를 추가하여 사이즈의 축소가 어렵다. 이러한 문제를 커플드 인덕터를 통하여 소형화된 컨버터를 제작하였다. 제작된 소형 DC-DC 컨버터는 실험을 통해 기존의 DC-DC 컨버터와 비교, 분석을 진행 하였다.

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A Distributed Control Architecture for Advanced Testing In Realtime

  • Thoen Bradford K.;Laplace Patrick N.
    • 한국지진공학회:학술대회논문집
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    • 한국지진공학회 2006년도 학술발표회 논문집
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    • pp.563-570
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    • 2006
  • Distributed control architecture is based on sharing control and data between multiple nodes on a network Communication and task sharing can be distributed between multiple control computers. Although many communication protocols exist, such as TCP/IP and UDP, they do not have the determinism that realtime control demands. Fiber-optic reflective shared memory creates the opportunity for realtime distributed control. This architecture allows control and computational tasks to be divided between multiple systems and operate in a deterministic realtime environment. One such shared memory architecture is based on Curtiss-Wright ScramNET family of fiber-optic reflective memory. MTS has built seismic and structural control software and hardware capable of utilizing ScramNET shared memory, opening up infinite possibilities in research and new capabilities in Hybrid and Model-In-The-Loop control.

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바이모달 트램용 감속기어장치의 무부하 성능평가 (Idling Performances of Reduction Gear Unit for Bimodal Tram)

  • 김연수;목재균;장세기;홍용기;김용기;김진완;김태형
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2008년도 추계학술대회 논문집
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    • pp.584-589
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    • 2008
  • A bi-modal tram has been developing to consist of articulated-two cars propelled by CNG hybrid (series type) in Korea since 2003. All wheels are driven by electrical motors independently, which can eliminate differential gears to reduce turning radius and make low floor to provide the old and the handicapped with easy access. In the bi-modal tram, therefore, reduction gear unit is key technology to make low floor and drive wheels independently. This study was aimed at performance evaluations of the reduction gear unit for the bi-modal tram. Oil leakage, oil temperature, vibration, acoustic noise in idle operations were measured for the reduction gear unit of the bimodal tram.

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SLIDERS FOR THE NEXT GENERATION MAGNETIC HARD DISK DRIVE SYSTEMS-NUMERICAL SIMULATION

  • Jhon, Myung-S.;Peck, Paul-R.;Kang, Soo-Choon;Wang, Benjamin-L.;Kim, In-Eung;Park, Ki-Ook
    • 한국자기학회지
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    • 제5권5호
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    • pp.695-701
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    • 1995
  • Fundamental issues and general procedures of modeling the head disk interface (HDI) in order to provide design criteria for future ultra-low flying sliders are given. Intermittent contact and gaseous rarefaction effects are discussed using nonconventional kinetic theory. To illustrate the simulation results, we modeled IBM 3370 taper flat sliders and positive/negative "bow tie" sliders. Several alternative HDI concepts for future disk drives - viscoelastic bearings, a hybrid system, and contact recording - are also briefly discussed.

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The Dynamics of Noise and Vibration Engineering Vibrant as ever, for years to come

  • Leuridan, Jan
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2010년도 춘계학술대회 논문집
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    • pp.47-47
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    • 2010
  • Over the past 20 years, constant progress in noise and vibration (NVH) engineering has enabled to constantly advance quality and comfort of operation and use of really any products - from automobiles to aircraft, to all kinds of industrial vehicles and machines - to the extend that for many products, supreme NVH performance has becomes part of its brand image in the market. At the same time, the product innovation agenda in the automotive, aircraft and really many other industries, has been extended very much in recent years by meeting ever more strict environmental regulations. Like in the automotive industry, the drive towards meeting emission and CO2 targets leads to very much accelerated adoption of new powertrain concepts (downsizing of ICE, hybrid-electrical...), and to new vehicle architectures and the application of new materials to reduce weight, which bring new challenges for not only maintaining but further improving NVH performance. This drives for innovation in NVH engineering, so as to succeed in meeting a product brand performance for NVH, while as the same time satisfying eco-constraints. Product innovation has also become increasingly dependent on the adoption of electronics and software, which drives for new solutions for NVH engineering that can be applied for NVH performance optimization of mechatronic products. Finally, relentless pressure to shorten time to market while maintaining overall product quality and reliability, mandates that the practice and solutions for NVH engineering can be optimally applied in all phases of product development. The presentation will first review the afore trends for product and process innovation, and discuss the challenges they represent for NVH engineering. Next, the presentation discusses new solutions for NVH engineering of products, so as to meet target brand values, while at the same time meeting ever more strict eco constraints, and this within a context of increasing adoption of electronics and controls to drive product innovation. NVH being very much defined by system level performance, these solutions implement the approach of "Model Based System Engineering" to increase the impact of system level analysis for NVH in all phases of product development: - At the Concept Phase, to be able to do business case analysis of new product concepts; to arrive at an optimized and robust product architecture (e.g. to hybrid powertrain lay-out, to optimize fuel economy); to enable target cascading, to subsystem and component level. - In Development Phase, to increase realism and productivity of simulation, so as to frontload virtual validation of components and subsystems and to further reduce reliance on physical testing. - During the final System Testing Phase, to enable subsystem testing by a combination of physical testing and simulation: using simulation models to simulate the final integration context when testing a subsystem, enabling to frontload subsystem testing before final system integration is possible. - To interconnect Mechanical, Electronical and Controls engineering, in all phases of development, by supporting model driven controls engineering (MIL, SIL, HIL). Finally, the presentation reviews examples of how LMS is implementing such new applications for NVH engineering with lead customers in Europe, Asia and US, with demonstrated benefits both in terms of shortening development cycles, and/or enabling a simulation based approach to reduce reliance on physical testing.

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The Future of NVH Research - A Challenge by New Powertrains

  • Genuit, Ing. K.
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2010년도 춘계학술대회 논문집
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    • pp.48-48
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    • 2010
  • Sound quality and NVH-issues(Noise, Vibration and Harshness) of vehicles has become very important for car manufacturers. It is interpreted as among the most relevant factors regarding perceived product quality, and is important in gaining market advantage. The general sound quality of vehicles was gradually improved over the years. However, today the development cycles in the automotive industry are constantly reduced to meet the customers' demands and to react quickly to market needs. In addition, new drive and fuel concepts, tightened ecological specifications, increase of vehicle classes and increasing diversification(increasing market for niche vehicles), etc. challenge the acoustic engineers trying to develop a pleasant, adequate, harmonious passenger cabin sound. Another aspect concerns the general pressure for reducing emission and fuel consumption, which lead to vehicle weight reductions through material changes also resulting in new noise and vibration conflicts. Furthermore, in the context of alternative powertrains and engine concepts, the new objective is to detect and implement the vehicle sound, tailored to suit the auditory expectations and needs of the target group. New questions must be answered: What are appropriate sounds for hybrid or electric vehicles? How are new vehicle sounds perceived and judged? How can customer-oriented, client-specific target sounds be determined? Which sounds are needed to fulfil the driving task, and so on? Thus, advanced methods and tools are necessary which cope with the increasing complexity of NVH-problems and conflicts and at the same time which cope with the growing expectations regarding the acoustical comfort. Moreover, it is exceedingly important to have already detailed and reliable information about NVH-issues in early design phases to guarantee high quality standards. This requires the use of sophisticated simulation techniques, which allow for the virtual construction and testing of subsystems and/or the whole car in early development stages. The virtual, testing is very important especially with respect to alternative drive concepts(hybrid cars, electric cars, hydrogen fuel cell cars), where complete new NVH-problems and challenges occur which have to be adequately managed right from the beginning. In this context, it is important to mention that the challenge is that all noise contributions from different sources lead to a harmonious, well-balanced overall sound. The optimization of single sources alone does not automatically result in an ideal overall vehicle sound. The paper highlights modern and innovative NVH measurement technologies as well as presents solutions of recent NVH tasks and challenges. Furthermore, future prospects and developments in the field of automotive acoustics are considered and discussed.

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응용프로그램의 기동시간 단축을 위한 파일 시스템 수준의 SSD 캐싱 기법 (File-System-Level SSD Caching for Improving Application Launch Time)

  • 한창희;유준희;이동은;강경태;신현식
    • 정보과학회 논문지
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    • 제42권6호
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    • pp.691-698
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    • 2015
  • 응용프로그램의 기동 시간은 기기에 대한 사용자 체험에 영향을 주는 중요한 지표로 보조 기억 장치의 성능에 의해 큰 영향을 받는다. 하드디스크 대신 SSD를 사용하게 되면 기동 시간을 크게 낮출 수 있지만 비용 대비 성능을 고려하면 작은 용량의 SSD를 하드디스크의 캐시로 쓰는 것이 현실적인 대안이 될 수 있다. 본 논문에서는 파일시스템 수준에서 하드디스크 상의 블록을 SSD로 이주시키는 기법을 제안한다. 제안한 기법은 기존의 SSD 캐싱 기법들에서 요구되던 캐시 데이터의 사상에 필요한 주 메모리, CPU, 그리고 사상 정보의 유지를 위한 SSD 공간 사용의 부가적인 오버헤드가 없다. 8개의 응용프로그램을 이용한 실험에서 메타데이터와 데이터 블록을 모두 SSD에 캐싱한 경우에 기동시간이 평균 56% 단축됨을 확인하였다.