Earticle

초록

영어

Recently, as the sense of crisis over global climate change has grown, the international community is implementing carbon emission regulations and carbon neutrality policies. Efforts to reduce emissions are being strengthened in the transportation and transport sectors, which account for 25% of global greenhouse gas emissions. In response to these regulations and policies, efforts are being made to apply eco-friendly electric propulsion technology to aircraft, ships, and automobiles. Researches are being conducted to improve power density and efficiency by using superconductors that have a high current density compared to the copper wire and whose electrical resistance becomes “0” below the critical condition. Among the electromagnet technologies utilizing the high-temperature superconductors (HTS), the non-insulated (NI) winding technique that removes insulation between winding turns can dramatically improve thermal, electrical, and mechanical stability compared to the existing insulation method. However, technical problems arise due to current leakage, such as magnetic field charging-delay and -loss. Especially, when applying the NI technique to the field coil of a HTS synchronous motor, the output responsiveness may be degraded due to current leakage when the motor speed or load changes. Therefore, in this paper, the dynamic characteristics of a HTS motor were analyzed by changing the contact resistance of the NI field coil, which determine the current leakage. By modeling the d−q equivalent circuit for a HTS motor, the motor speed, torque, field leakage current, and field voltage according to the change in d-axis current were analyzed when controlling the maximum torque operation per unit current.

목차

Abstract
1. 서론
2. d축 전기자 전류 변화에 의한 고온초전도 동기전동기 계자 코일의 누설전류
2.1. 고온초전도 동기전동기의 d-q 등가회로 모델
2.2. 고온동기전동기의 전기자-계자 상호 커플링에 의한 무절연계자 코일측 누설전류
3. 무절연 고온초전도 전동기 기동 특성 해석
3.1. 레이스트렉형 무절연 계자코일의 접촉저항
4. 결론
ACKNOWLEDGMENT
REFERENCES

키워드

저자

• Jung Hoon [ Faculty of Applied Energy System Electrical Engineering, Jeju National University, Jeju, South Korea ]
• Yoon Seok Chae [ Faculty of Applied Energy System Electrical Engineering, Jeju National University, Jeju, South Korea ]
• Ho Min Kim [ Faculty of Applied Energy System Electrical Engineering, Jeju National University, Jeju, South Korea ]
• Sung Hoon Lee [ Electric Energy Research Center, Jeju National University, Jeju, South Korea ]
• Ji Hyung Kim [ Electric Energy Research Center, Jeju National University, Jeju, South Korea ] Corresponding Author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국초전도·저온논문지 (구 한국초전도저온공학회논문지) [Progress in Superconductivity and Cryogenics]

• 간기

  계간

• pISSN

  1229-3008

• eISSN

  2287-6251

• 수록기간

  1999~2026

• 등재여부

  KCI 등재,SCOPUS

• 십진분류

  KDC 427 DDC 537