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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 車翰周
- 발행연도
- 2013
- 저작권
- 충남대학교 논문은 저작권에 의해 보호받습니다.
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In this paper, a Power Processing Unit(PPU) is studied and the converter improves stability for the operation of hall-effect propulsion system(HEPS) using microwave cathode. Especially the Bias DC-DC converter is essential for HEPS to secure stable operation.
Hall thrusters with high-efficiency and high-specific impulse operation are currently being developed at Satrec Initiative (SI), prime contractor for the Low Earth Orbit (LEO) earth observation mission with DubaiSat-2 satellite and the thruster is designed to be operated at its power level up to 300 W of power.
It is critically important that the design optimization of the PPU is considered for the development of a highly efficient and reliable HEPS because non-linear operation and dynamic plasma load may result in large current oscillation and negative resistance characteristics. In this regards, this study introduces the modeling for the design optimization of PPU and mathematical analysis.
In order to design the stable controller based on the aforementioned analysis, two PI controllers, for constant voltage and constant current, are connected in parallel. In case of the Bias DC-DC converter, Negative (-) 100 V regulated voltage is to be generated in the constant voltage mode and the controller has a variable reference voltage depending upon Anode current so as to adjust the Bias current in the improved constant current mode. The above two control modes make the Bias current follow and trace the Anode current well in the actual test.
Hall thrusters with high-efficiency and high-specific impulse operation are currently being developed at Satrec Initiative (SI), prime contractor for the Low Earth Orbit (LEO) earth observation mission with DubaiSat-2 satellite and the thruster is designed to be operated at its power level up to 300 W of power.
It is critically important that the design optimization of the PPU is considered for the development of a highly efficient and reliable HEPS because non-linear operation and dynamic plasma load may result in large current oscillation and negative resistance characteristics. In this regards, this study introduces the modeling for the design optimization of PPU and mathematical analysis.
In order to design the stable controller based on the aforementioned analysis, two PI controllers, for constant voltage and constant current, are connected in parallel. In case of the Bias DC-DC converter, Negative (-) 100 V regulated voltage is to be generated in the constant voltage mode and the controller has a variable reference voltage depending upon Anode current so as to adjust the Bias current in the improved constant current mode. The above two control modes make the Bias current follow and trace the Anode current well in the actual test.
목차
목 차제1장 서 론 11.1 전기추력기 개발 배경 11.2 전력변환장치의 연구 목적 및 방향 3제2장 홀(hall) 추력기와 음극의 이해 42.1 홀 추력기의 동작 원리 및 구성 42.2 음극의 동작 원리 및 구성 102.2.1 Hollow cathode 102.2.2 Microwave cathode 12제3장 전기추력기 시스템(HEPS) 133.1 HEPS 개요 및 구성 133.2 전력변환장치의 구성 163.3 연료부 밸브제어 18제4장 전력변환 장치의 설계 214.1 포워드 컨버터의 소개 214.1.1 동작 원리 214.1.2 정상상태 해석 244.2 컨버터 소신호 모델링 334.3 제어기 해석 47제5장 음극 전원의 설계 505.1 음극전원 개요 및 설계 505.2 제어기 구현 및 설계 58제 6장 제작 및 실험 786.1 전력변환장치의 동작 특성실험 786.2 음극전원의 성능 결과 비교 83제 7장 결 론 86참 고 문 헌 88ABSTRACT 90
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