• 제목/요약/키워드: Electric Pole

검색결과 249건 처리시간 0.04초

하이브리드 자동차용 계자 권선형 동기전동기의 최대 토크 운전 (Maximum Torqu Control Of Salient-Pole Synchronous-Induction Motor For Hybrid Electric Vehicle)

  • 유성환;송우현;김준석
    • 전력전자학회:학술대회논문집
    • /
    • 전력전자학회 2013년도 전력전자학술대회 논문집
    • /
    • pp.82-83
    • /
    • 2013
  • 친환경 차량에 대한 관심이 급증함에 따라 고효율 운전이 가능한 하이브리드 전기자동차(이하 HEV)에 대한 관심이 급증하고 있다. HEV에는 효율이 높고 단위 체적당 토크가 큰 고성능 전동기가 적용되고 있으며 자동차에 적용되는 특수성으로 인해 고속영역에서의 안정된 출력 특성이 요구되고 있다. 회전계자부에 권선을 적용한 계자권선형 동기전동기는 영구자석형 전동기에 비해 효율이 다소 감소하는 단점이 있으나, 공극 자속을 임의로 제어할 수 있기 때문에 저속영역부터 10,000rpm 이상의 고속영역까지 탁월한 가변속 능력을 발휘하는 장점이 있으며, 저용량 HEV에 매우 적합한 특성을 지니고 있다. 그러나, 일반적인 영구자석형 동기전동기와는 다르게 d,q축 전류 뿐만 아니라 자속성분 전류까지 제어 대상에 포함되므로 제어계가 복잡해지는 문제가 발생한다. 본 논문에서는 HEV용 계자 권선형 동기전동기의 단위 전류당 최대토크 제어(MTPA)에 대하여 연구를 진행하였으며, 전압-전압제한 하에서 이론적으로 발생 가능한 최대토크 능력 커브를 기반으로 실제 시스템에서 쉽게 구현할 수 있는 약계자 제어 알고리즘을 제안한다.

  • PDF

FDTD 병렬화 알고리즘을 이용한 무선랜용 마이크로스트립 대역통과 펄터 설계 (The Design of Microstrip Bandpass Filter for Wireless LAN using FDTD Parallel Algorithm)

  • 최성열;박경수;고영호
    • 대한전기학회논문지:전기물성ㆍ응용부문C
    • /
    • 제53권7호
    • /
    • pp.395-400
    • /
    • 2004
  • In this paper, the four-pole elliptic function microstrip filter at 2.4GHz band with fractional bandwidth of 4% is realized using compact miniaturized hairpin resonators. The parallel algorithm FDTD method is used to analyze S-parameter of hairpin resonator filter more accurately, and to calculate the electric coupling and magnetic coupling among the hairpin resonators. Absorbing boundary conditions for mesh termination used Sulivan's simplified PML and the FDTD code was paralleled by MPI for IBM SP2 which had enhanced calculation speed. The experimental measurements are performed by HP8720D vector network analyzer. Measured results on fabricated hairpin type cross coupled bandpass filters show good agreements with theoretic results.

브러시레스 전동기의 코깅토크 해석 및 특성해석 (Analysis of Cogging Torque and Characteristics in Brushless DC Motor)

  • 이지영;임양수;홍정표;김규탁;신상윤
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 2000년도 하계학술대회 논문집 B
    • /
    • pp.629-631
    • /
    • 2000
  • This paper deals with the design of a inner rotor type Brushless DC (BLDC) motor for Electric Power Steering to reduce the cogging torque. The effect of the design parameters on the characteristic and cogging torque is analyzed by Finite Element Method (FEM). The considered design parameters are as follows : the number of pole and slot. dead-zone and skew angle. and teeth shape. The winding resistance of each motor is calculated and the characteristic curve is derived from considering reactance drop voltage for original model.

  • PDF

유기 전기발광 소자에 관한 연구 (A Research on Organic Electro-luminescence)

  • 이한성
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 2005년도 학술대회 논문집 전문대학교육위원
    • /
    • pp.82-85
    • /
    • 2005
  • Organic EL has been expected to adopt to a new styles of technology that make flat display after Tang & Vanslyke made good electric luminescence device in late 1980s. Their studies based on multi layer structure that consists of emitting layer and carrier transporting layer using proper organic material. In this study, we made multi layer device using $Eu(TTA)_3(phen)$ as a luminescence material by PVD and investigate luminous properties of each device. But oxidization of organic layer by ITO, energy walls in both pole interface, contaminations of ITO surface, importance of protecting membrane, diffusive dimming of light to cathode organic layer, these causes of degradations are common facts of a macromolecule and micromolecule. We think these degradation caused by the impact of heat and electro-chemical factor, bulk effect and interface phenomenon, and raise a question.

  • PDF

대체에너지 시스템의 출력 평준화를 위한 EMB용 초고속 전동발전기 (High Speed Motor/Generator of an Electro-Mechanecal Battery for Power Averaging of Alternative energy system)

  • 장석명;윤인기;류동완;최상규;윤기갑
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 2001년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
    • /
    • pp.337-339
    • /
    • 2001
  • High speed brushless permanent magnet (PM) machines are a key technology for electric drives and motion control systems for many application, since they are conductive to high efficiency, high power density small size and low weight. Proposed slotless PM machine is constructed without stator winding slots. Its stator magnetic material is in the form of a ring and winding have a toroidal configuration and its rotor consists of a 4-pole Halbach array or radially magnetized PM rotor.

  • PDF

Characteristic Impedances in Low-Voltage Distribution Systems for Power Line Communication

  • Kim, Young-Sung;Kim, Jae-Chul
    • Journal of Electrical Engineering and Technology
    • /
    • 제2권1호
    • /
    • pp.29-34
    • /
    • 2007
  • The input and output impedances in a low voltage distribution system is one of the most important matters for power line communication because from the viewpoint of communication, the attenuation characteristic of the high frequency signals is greatly caused by impedance mismatch during sending and receiving. The frequency range is from 1MHz to 30MHz. Therefore, this paper investigates the input and output impedances in order to understand the characteristic of high frequency signals in the low voltage distribution system between a pole transformer and an end user. For power line communication, the model of Korea's low voltage distribution system is proposed in a residential area and then the low voltage distribution system is set up in a laboratory. In the low voltage distribution system, S parameters are measured by using a network analyzer. Finally, input and output impedances are calculated using S parameters.

유기 발광 다이오드의 제작 및 특성에 관한 연구 (A study on Fabrication and Characterization of Organic Light-Emitting Diodes)

  • 이한성
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 2008년도 정기총회 및 학술대회 전문대학교육위원
    • /
    • pp.89-91
    • /
    • 2008
  • Organic EL has been expected to adopt to a new styles of technology that make flat display after Tang & Vanslyke made good electric luminescence device in late 1980s. Their studies based on multi layer structure that consists of emitting layer and carrier transporting layer using proper organic material. But oxidization of organic layer by ITO, energy walls in both pole interface, contaminations of ITO surface, importance of protecting membrane, diffusive dimming of light to cathode organic layer, these causes of degradations are common facts of a macromolecule and micro molecule. We think these degradation caused by the impact of heat and electro-chemical factor, bulk effect and interface phenomenon, and raise a question.

  • PDF

A Low Cost Position Sensing Method with Optical Sensors for Switched Reluctance Motor

  • Yoon Yong-Ho;Jeong Kyun-Ha;Kim Jae-Moon;Won Chung-Yuen;Kim Ji-Won
    • Journal of Power Electronics
    • /
    • 제5권3호
    • /
    • pp.240-246
    • /
    • 2005
  • Considering the start-up and economical efficiency, the optical sensor technique using a slotted-disk and an opto-interrupter are appropriate, however, this method needs three opto-interrupters and a slotted-disk when driving the 6/4 pole SRM(switched reluctance motor). In this paper, we propose an economic method by replacing the conventional opto-interrupter and slotted-disk with only optical sensor which enables the motor to start up and forward and reverse operation. Also the control circuit includes only analog devices, which makes the process more economical.

유기EL 소자의 수명에 관한 연구 (A Research on Life of Organic Lumminescence Devices)

  • 이한성
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 2002년도 학술대회 논문집 전문대학교육위원
    • /
    • pp.110-113
    • /
    • 2002
  • Organic EL has been expected to adopt to a new styles of technology that make flat display after Tang & Vanslyke made good electric luminescence device in late 1980s. Their studies based on multi layer structure that consists of emitting layer and carrier transporting layer using proper organic material. In this study. we made multi layer device using $Eu(TTA)_3(phen)$ as a luminescence material by PVD and investigate luminous properties of each device. But oxidization of organic layer by ITO. energy walls in both pole interface. contaminations of ITO surface, importance of protecting membrane, diffusive dimming of light to cathode organic layer. these causes of degradations are common facts of a macromolecule and micromolecule. We think these degradation caused by the impact of heat and electro-chemical factor, bulk effect and interface phenomenon. and raise a question.

  • PDF

배전전주에서의 까치 둥지짓기와 기피반응에 관한 연구 (Study on magpie nestling and avoiding action at electric pole)

  • 김동명;박상만;권태호;이병호;최원석
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 2005년도 추계학술대회 논문집 전기설비전문위원
    • /
    • pp.87-89
    • /
    • 2005
  • Most of electrical service outage in overhead distribution lines are due to the magpies. The magpies make the short circuit in building up there nests and the grounding fault in directly contacting with the energized conductors. This paper described the performance of the existing anti-magpie devices to prevent the fault due to birds in distribution lines the reaction tests for the magpies were carried out for the sensors to simulate them in there territory.

  • PDF