• 제목/요약/키워드: Pole type

검색결과 411건 처리시간 0.027초

등가 자기회로법을 이용한 Claw-pole type generator의 특성해석 (An Application of Equivalent Magnetic Circuit method to the analysis of Claw-pole type generator)

  • 정재우;권순오;이상호;홍정표
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2005년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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    • pp.120-122
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    • 2005
  • Magnetic field analysis of claw-pole type generator using equivalent circuit is presented in this paper. On the basis of 3D geometry and flux paths, equivalent magnetic circuit is designed and field analysis is performed by solving the circuit. Non-linear characteristic of material is considered for precise analysis results. 3D FEA is performed to verify analysis results, and flux densities in rotor and stator regions are compared. Calculated no-load back emf for field input voltage and speed are verified by experiment. Comparing to 3D FEA, presented method provides precise results with instant calculation time.

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Design Considerations for Low Voltage Claw Pole Type Integrated Starter Generator (ISG) Systems

  • Lee, Geun-Ho;Choi, Geo-Seung;Choi, Woong-Chul
    • Journal of Power Electronics
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    • 제11권4호
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    • pp.527-532
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    • 2011
  • Due to the need for improved fuel consumption and the trend towards increasing the electrical content in automobiles, integrated starter generator (ISG) systems are being considered by the automotive industry. In this paper, in order to change the conventional generator of a vehicle, a belt driven integrated starter generator is considered. The overall ISG system, the design considerations for the claw pole type AC electric machine and a low voltage very high current power stage implementation are discussed. Test data on the low voltage claw pole type machine is presented, and a large current voltage source DC/AC inverter suitable for low voltage integrated starter generator operation is also presented. A metal based PCB (Printed Circuit Board) power unit to attach the 4-parallel MOS-FETs is used to achieve extremely high current capability. Furthermore, issues related to the torque assistance during vehicle acceleration and the generation/regeneration characteristics are discussed. A prototype with the capability of up to 1000 A and 27 V is designed and built to validate the kilo-amp inverter.

Macpherson형 현가장치의 새로운 모델링과 최적극배치 제어 (A New Model and Optimal Pole-Placement Control for the Suspension System of Macpherson Type)

  • 홍금식;전동섭;김철민;유완석
    • 제어로봇시스템학회논문지
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    • 제4권6호
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    • pp.713-721
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    • 1998
  • In this paper a new modeling and an optimal pole-placement control for the suspension system of Macpherson type are investigated. The rotational motion of the unsprung mass is emphasized in the new modeling. The two generalized coordinates selected in the new model are the vortical displacement of sprung mass and the angular displacement of control arm. Both variables are measured from their static equilibrium points. It is shown that the conventional model is a special case of the new model since the transfer function of the new model coincides with that of the conventional one if the lower support point of the shock absorber is located at the mass center of the unsprung mass. It is also shown that the resonance frequencies of the new model agree better with experimental results. Therefore, the new model is more general in the sense that it Provides an extra degree of freedom in determining the plant model for control system design. An optimal pole-placement control which combines LQ control and pole-placement technique is applied to the new model. Simulations are provided.

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2극 초전도 동기기 설계법 고찰 (Design Considerations of 2-pole Synchronous Superconducting Rotating Machine)

  • 백승규;손명환;이언용;권영길;류강식;조영식
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2001년도 하계학술대회 논문집 B
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    • pp.865-867
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    • 2001
  • Generally large synchronous rotating machines with 2 poles have more merits than the others with more than 2 poles Superconducting synchronous rotating machines also have the same tendency, but they have different structure from conventional ones because of no magnetic core inside of the rotor. As the result, design approaches of the superconducting field coils are also different, which would be classified into 2 types according to their coil shapes. The first one is race-track type and the other is saddle type Race-track type machines have almost the same structure with conventional salient pole generators which are being used as largely small scale machines with more than 2 poles. On the other hand saddle type machines correspond to conventional cylindrical generators with 2 poles used for large turbine system in power plants. In this paper several types of superconducting field coils are introduced for 2 pole superconducting machine design and then the feasibility of each type is considered. Moreover, based on the consideration. 1MVA superconducting generator(S.G.) with saddle type field coil is designed electromagnetically.

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주상 변압기 최대부하 추정을 위한 부하상관계수 및 수용율 조정 (Adjustment of Load Regression Coefficients and Demand-Factor for the Peak Load Estimation of Pole-Type Transformers)

  • 윤상윤;김재철;박경호;문종필;이진;박창호
    • 대한전기학회논문지:전력기술부문A
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    • 제53권2호
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    • pp.87-96
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    • 2004
  • This paper summarizes the research results of the load management for pole transformers done in 1997-1998 and 2000-2002. The purpose of the research is to enhance the accuracy of peak load estimation in pole transformers. We concentrated our effort on the acquisition of massive actual load data for modifying the load regression coefficients, which related to the peak load estimation of lamp-use customers, and adjusting the demand-factor coefficients, which used for the peak load prediction of motor-use customers. To enhance the load regression equations, the 264 load data acquisition devices are equipped to the sample pole transformers. For the modification of demand factor coefficients, the peak load currents are measured in each customer and pole transformer for 13 KEPCO (Korea Electric Power Corporation) distribution branch offices. Case studies for 50 sample pole transformers show that the proposed coefficients could reduce estimating error of the peak load for pole transformers, compared with the conventional one.

Fault Tolerant Homopolar Magnetic Bearings with Flux Invariant Control

  • Na Uhn-Joo
    • Journal of Mechanical Science and Technology
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    • 제20권5호
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    • pp.643-651
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    • 2006
  • The theory for a novel fault-tolerant 4-active-pole homopolar magnetic bearing is developed. If any one coil of the four coils in the bearing actuator fail, the remaining three coil currents change via an optimal distribution matrix such that the same opposing pole, C-core type, control fluxes as those of the un-failed bearing are produced. The hompolar magnetic bearing thus provides unaltered magnetic forces without any loss of the bearing load capacity even if any one coil suddenly fails. Numerical examples are provided to illustrate the novel fault-tolerant, 4-active pole homopolar magnetic bearings.

OBSERVATION OF THE MAGNETIC DOMAIN IN THIN-FILM HEADS BY ELECTRON MICROSCOPY

  • Kobayashi, Kazuo
    • 한국자기학회지
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    • 제5권5호
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    • pp.710-715
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    • 1995
  • Magnetic domains were observed using an image lock-in technique for backscattered electron contrast (Type II) with a 200 kV scanning electron microscope. Backscattered electrons indicate a difference in magnetic domain structures at the upper and lower parts of the upper pole in thin-film heads, changing the acceleration voltage. With this method, it is also possible to observe the domain structure of the thin-film head pole through a 10 to $20\;\mu\textrm{m}$ protective layer, and the upper shield of the MR head through the coil in the resist, alumina overcoat, and upper pole.

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감쇠극을 갖는 적층형 세라믹 칩 필터의 설계 (Design of Multilayer Ceramic Chip Band pas Filter with an attenuation pole)

  • 강종윤;심성훈;최지원;박용욱;윤석진;김현재
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2002년도 하계학술대회 논문집
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    • pp.123-126
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    • 2002
  • A proposed multi-layer ceramic (MLC) chip type band-pass filter (BPF) is presented. The MLC chip BPF has the benefits of low cost and small size. The BPF consists of coulped stripline resonators and coupling capacitors. The BPF is designed to have an attenuation pole at below the passband for a receiver band of IMT-2000 handset. The computer-aided design technology is applied for analysis of the BPF frequency characteristics. The passband and attenuation pole depend the coupling between resonators and coupling capacitance. The frequency characterics of the passband and attenuation pole are analysed with the variance of the coupling between resonators and coupling capacitance. An equivalent circuit and structure of MLC chip BPF are proposed. The frequency characteristics of the BPF is well acceptable for IMT-2000 application.

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

  • 심장호;정인성;윤상백;현동석
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1997년도 하계학술대회 논문집 A
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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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감쇠극을 갖는 적층형 세라믹 칩 필터의 설계 (Design of Multilayer Ceramic Chip Band Pass Filter with an Attenuation Pole)

  • 강종윤;심성훈;최지원;박용욱;이동윤;윤석진;김현재
    • 한국전기전자재료학회논문지
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    • 제16권8호
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    • pp.740-743
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    • 2003
  • A multi-layer ceramic (MLC) chip type band-pass filter (BPF) is presented. The MLC chip BPF has the benefits of low cost and small size. The BPF consists of coulped stripline resonators and coupling capacitors. The BPF is designed to have an attenuation pole at below the passband for a receiver band of IMT-2000 handset. The computer-aided design technology is applied for analysis of the BPF frequency characteristics. The passband and attenuation pole depend on the coupling between resonators and coupling capacitance. The frequency characterics of the passband and attenuation pole are analyzed with the variation of the coupling between resonators and coupling capacitance. An equivanlent circuit and structure of MLC chip BPF are proposed. The frequency characteristics of the BPF is well acceptable for IMT-2000 application.