Earticle

초록

영어

Torque tubes in High Temperature Superconducting (HTS) motor transfer torque from superconducting field winding rotor to the room temperature shaft. It should have minimum heat conduction property for minimizing the load on cryo-refrigerator. Generally, these torque tubes are made with stainless steel material because of high strength, very low outgassing and low thermal contraction properties at cryogenic temperatures and vacuum conditions. With recent developments in composite materials, these torque tubes could be made of composites such as Kevlar and S-Glass, which have the required properties like high strength and low thermal conductivity at cryogenic temperatures, but with a reduced weight. Development and testing of torque tubes made of these composites for HTS motor are taken up at Bharat Heavy Electricals Limited (BHEL), Hyderabad in collaboration with Central Institute of Plastics and Engineering Technology (CIPET), Chennai and Indian Institute of Technology (IIT), Kharagpur. As these materials are subjected to vacuum, it is important to measure their outgassing rates under vacuum conditions before manufacturing prototype torque tubes. The present study focusses on the outgassing characteristics of Kevlar and S-Glass, using an Outgassing Measurement System (OMS), developed at IIT Kharagpur. The OMS facility works under vacuum environment, in which the test samples are exposed to vacuum conditions over a sufficient period of time. The outgassing measurements for the composite samples were obtained using pressure-rise technique. These studies are useful to quantify the outgassing rate of composite materials under vacuum conditions and to suggest them for manufacturing composite torque tubes used in HTS motors.

목차

Abstract
1. INTRODUCTION
2. EXPERIMENT
2.1. Description of OMS
2.2. Measurement Procedure
3. RESULTS AND DISCUSSIONS
4. CONCLUSIONS
ACKNOWLEDGMENTS
REFERENCES

키워드

저자

• S. Thadela [ Cryogenic Engineering Centre, Indian Institute of Technology, Kharagpur, West Bengal, India ] Corresponding Author
• B V A S Muralidhar [ Cryogenic Engineering Centre, Indian Institute of Technology, Kharagpur, West Bengal, India, Corporate R & D, Bharat Heavy Electricals Limited, Hyderabad, India. ]
• B Kalyani [ Corporate R & D, Bharat Heavy Electricals Limited, Hyderabad, India. ]
• U K Choudhury [ Corporate R & D, Bharat Heavy Electricals Limited, Hyderabad, India. ]
• S N Yadav [ Central Institute of Plastics and Engineering Technology, Guindy, Chennai, India. ]
• V. V. Rao [ Cryogenic Engineering Centre, Indian Institute of Technology, Kharagpur, West Bengal, India ]

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