• 제목/요약/키워드: high temperature superconducting (HTS) motor

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HTS 벌크를 이용한 자기 베어링의 제작 및 특성 시험 (Manufacturing and test of magnetic bearings with HTS bulks)

  • 임형우;심정욱;차귀수;지준근
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2001년도 하계학술대회 논문집 B
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    • pp.733-735
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    • 2001
  • The high temperature superconducting bulk can be used as the bearing of a motor. This paper presents the fabrication and test results of a motor with superconducting bearing using HTS bulks. The bearing used four hexahedron type YBCO bulks. Height, width and depth of the HTS bulk were 10mm, 30mm and 30mm, respectively. Single phase induction motor was used to drive the shaft and solid rotor was adopted for high speed rotation. Test results show the motor with HTS magnetic bearing can rotate silently and smoothly without any contact.

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전기 추진 항공기에 적용하기 위한 고온초전도 모터의 초기 사이징 (Preliminary Sizing of a High Temperature Superconducting Motor for the Application to Electrically Propelled Aircraft)

  • 신교식;황호연;안존;남태우
    • 한국항공우주학회지
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    • 제40권9호
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    • pp.789-799
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    • 2012
  • 본 연구에서는 전기 항공기에 사용하기 적합한 높은 출력밀도를 발생시키는 고온초전도 모터를 설계하고 이를 항공기에 적용하는 것이 가능한지를 확인하는 연구를 수행하였다. 설계된 모터는 이트륨 바륨 구리 산화물 판, 비스무트-2223 산화물로 이루어진 초전도 코일을 사용하고, 철심을 사용하지 않는 공기 냉각 전기저항성 전기자를 사용하였다. 고온 초전도 판과 코일 쌍을 회전축 방향으로 증가시켜, 180 마력, 2700 분당회전수의 출력을 발생시키는 세스나급 항공기에 사용하는 O-360엔진과 18000 마력, 5000 분당회전수의 B-737급 항공기에 사용하는 CFM56엔진을 대체할 수 있는 동일 출력을 발생시키도록 설계하였다. 또한 기존 엔진의 출력밀도와 고온초전도 모터의 출력밀도를 비교하여 고온초전도 모터의 항공기 적용가능성을 평가하였다.

100hp급 고온초전도 모터의 자장분포특성 (Characteristic of Magnetic Field Distribution of 100hp Class High Temperature Superconducting motor)

  • 이정종;조영식;주진홍;홍정표;권영길
    • 한국초전도저온공학회:학술대회논문집
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    • 한국초전도저온공학회 2002년도 학술대회 논문집
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    • pp.312-314
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    • 2002
  • Magnetic circuit design of HTS (High Temperature Superconducting) motor is important to achieve the power at a given load condition, and it is essential to the thermal design for HTS motor rotors. To determine the result of thermal design, the magnetic field distribution has to be known exactly. On the basis of the 2 dimensional magnetic field analysis, the magnetic field distributions due to several cases are calculated by using Biot-Savart equation and magnetic image method. And the I$_{c}$ of HTS field coil was calculated by using I$_{c}$-B(equation omitted) curve and 3D FEA(Finite Element Analysis).is).

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100마력 고온초전도 동기전동기 개발 (Development of a 100 hp HTS Synchronous Motor)

  • 손명환;백승규;이언용;권영길;조영식;김종무;문태선;김영춘;권운식;박희주
    • 대한전기학회논문지:전기기기및에너지변환시스템부문B
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    • 제54권2호
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    • pp.94-100
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    • 2005
  • Korea Electrotechnology Research Institute(KERI) has successfully developed a 100hp-1800rpm-class high temperature superconducting(HTS) motor with high efficiency under partnership with Doosan Heavy Industries & Construction Co. Ltd. This motor has a HTS field winding and an air-cooled stator. The advantages of HTS motor can be represented by a reduction of 50% in both losses and size compared to conventional motors of the same rating. The cooling system is based on the heat transfer mechanism of the thermosyphon by using GM cryocooler as cooling source. The cold head is in contact with the condenser of a Ne-filled thermosyphon. Independently, the rotor assembly was tested at the stationary state and combined with stator. The HTS field winding could be cooled into below 30K. Test of open-circuit characteristics(OCC) and short-circuit characteristics(SCC) and load test with resistive load bank were conducted in generator mode. Also, load tests in motor mode driven by inverter were finished at KERI. Maximum operating current of field winding at 30K was 120A. From OCC and SCC test results synchronous inductance and synchronous reactance were 2.4mH, 0.49pu, respectively. Efficiency of this HTS machine was 93.3% in full load(100hp) test. This paper will present design, construction. and experimental test results of the 100hp HTS machine.

선박 추진용 저속형 고온초전도 모터 설계 (Design of Low-speed High-temperature Superconducting Motor for Ship Propulsion)

  • 백승규;권영길;김호민;이재득;이언용;김영춘;문태선;박희주;권운식;박관수
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2007년도 제38회 하계학술대회
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    • pp.947-948
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    • 2007
  • A superconducting synchronous motor with rotating field coil has been designed. This rotating field coil is composed of high-temperature superconducting(HTS) wire but the stationary armature windings are composed of conventional copper wire. In this paper a 5MW class synchronous motor with rotating HTS coil is designed. This motor is aimed to be utilized for ship propulsion so it has very low-speed. Firstly an air-cored type has been designed, which does not have any iron core both at the field and at the armature teeth. Secondly several iron-cored rotor types are considered to reduce expensive HTS wire cost.

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1MW 고온초전도 동기모터의 개념설계 고찰 (Conceptual Design Considerations of 1MW Class HTS Synchronous Motor)

  • 백승규;손명환;이언용;권영길;문태선;박희주;김영춘
    • 한국초전도ㆍ저온공학회논문지
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    • 제6권3호
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    • pp.38-43
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    • 2004
  • 1MW class superconducting synchronous motor is designed considering several conditions such as superconducting wire length, machine efficiency and size. As the machine is larger and larger, the superconducting machine shows the advantages more and more over the conventional machines. Although the advantages at 1MW rating are not so great, the design approach to get an appropriate result would be very helpful for larger superconducting synchronous machine design. Major design concerns are focused on reducing expensive Bi-2223 HTS(High Temperature Superconducting) wire which is used for superconducting field coil carrying the rating current around 30K(-243$^{\circ}C$) while the machine efficiency is higher than conventional motors or generators with the same rating. Furthermore, some iron cored structure is considered to reduce the HTS wire requirement without bad effect on machine performances such as sinusoidal armature voltage waveform, synchronous reactance and so on.

AC loss comparison of Bi-2223 and coated conductor HTS tapes under bending

  • Kim, Hae-Joon;Cho, Jeon-Wook;Sim, Ki-Deok;Kim, Jae-Ho;Kim, Seok-Ho;Jang, Hyun-Man;Lee, Soo-Gil
    • 한국초전도ㆍ저온공학회논문지
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    • 제9권4호
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    • pp.41-45
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    • 2007
  • Superconductor is developed for applications in high-power devices such as power-transmission cables, transformers, motor and generators. In such applications, HTS tapes are subjected to various kinds of stress or strain. AC loss is also important consideration for many large-scale superconducting devices. In the fabrication of the devices, the critical current $(I_c)$ of the high temperature superconductor degrades due to many reasons including the tension applied by bending and thermal contraction. These bending or tension reduces the $I_c$ of superconducting wire and the $I_c$ degradation affects the AC loss of the wire. The $I_c$ degradation and AC loss (self field loss) of Bi-2223 HTS and Coated conductor were measured under tension and bending conditions at 77K and self-field.

고온초전도벌크형 전동기의 특성시험 (Performance Evaluation of the HTS Bulk type Motor)

  • 심정욱;임형우;차귀수
    • 한국초전도ㆍ저온공학회논문지
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    • 제2권2호
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    • pp.44-48
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    • 2000
  • The high temperature superconducting bulk can be used as the rotor of an ac motor. This paper presents the fabrication and test results of a ac motor with HTS bulk rotor. The rotor of a conventional squirrel cage induction motor was replaced with cylinder type YBCO bulk. Height and outer diameter of the HTS bulk was 15mm and 46mm, respectively. Eddy current brake using aluminium disk was used to measure the torque of the HTS motor. No load test, locked rotor test and load test were performed to examine the characteristics of the HTS motor. Test results show the motor can rotate at synchronous speed without any special starting circuit. Maximum output power of the constructed HTS motor was 408W.

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A study on design process of HTS bulk magnet synchronous motors

  • Jaheum Koo;JuKyung Cha;Jonghoon Yoon;Seungyong Hahn
    • 한국초전도ㆍ저온공학회논문지
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    • 제26권1호
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    • pp.1-4
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    • 2024
  • This study explores the use of a bulk type high-temperature superconductors (HTS) as trapped field magnets in synchronous motors. A HTS bulk is examined for its ability to generate powerful magnetic fields over a permanent magnet and to eliminate the need for a direct power supply connection compared to a tape form of HTS. A 150 kW interior-mounted bulk-type superconducting synchronous motor is designed and analyzed. The A-H formulation is used to numerical analysis. The results show superior electrical performance and weight reduction when comparing the designed model with the conventional permanent magnet synchronous motor of the same topology. This study presents HTS bulk synchronous motor's overall design process and highlights its potential in achieving relatively high power density than conventional permanent magnet synchronous motor.

Test results of a 5 kW fully superconducting homopolar motor

  • Lee, J.K.;Park, S.H.;Kim, Y.;Lee, S.;Joo, H.G.;Kim, W.S.;Choi, K.;Hahn, S.Y.
    • 한국초전도ㆍ저온공학회논문지
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    • 제15권1호
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    • pp.35-39
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    • 2013
  • The superconducting Homopolar motor is manufactured and tested. Homopolar motor system is simple and solid as the field coil of the motor is fixed near the stator coil without rotating system. In this paper, a 5 kW fully superconducting homopolar motor which has high temperature superconducting armature and field coils is manufactured and tested in liquid nitrogen. The critical current test results of the used 2G superconducting wire, pancake coil for rotor winding and race-track coils for armature winding are reported. Also, the test result of rotating and operating performance is presented. The operating frequency is to be 5 Hz for low-speed rotating. The developed fully superconducting Homopolar motor is the world's first.