DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Moon, Gun-Woo | - |
dc.contributor.advisor | 문건우 | - |
dc.contributor.author | Lee, Nayoung | - |
dc.date.accessioned | 2021-05-11T19:38:26Z | - |
dc.date.available | 2021-05-11T19:38:26Z | - |
dc.date.issued | 2019 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=871455&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/283281 | - |
dc.description | 학위논문(박사) - 한국과학기술원 : 전기및전자공학부, 2019.8,[ix, 83 p. :] | - |
dc.description.abstract | Satellite DC/DC power converters are required to have a high reliability and to comply the EMC requirements. The high reliability requirement limits the DC/DC converter’s design in terms of its structure and the number of applicable FET switches and diodes, and the heritage topologies that have been verified for a long time in these environments can be applied to the satellite DC/DC converter. Moreover, large EMI filters have been inevitably needed for the satellite DC/DC converter to meet the EMC requirement. In addition, due to the size and weight limitation of the satellite electronic unit, the satellite DC/DC converter should have a high-power-density design. However, EMI filter usually occupies large portion of the DC/DC converter board. The EMI noise is directly related with the level of di/dt and the pulsating ripple of input current waveform. Therefore, it is beneficial to minimize the input current ripple significantly for the smaller sized EMI filter. The conventional ACF topology has a zero-voltage-switching capability, better EMI performance and more reduced switching loss than other heritage topologies. However, it has still pulsating input current waveform with high di/dt level and high switch voltage stress, which is disadvantageous in terms of the EMI filter size and satellites with high input voltage. In this dissertation, a new ACF topology with a continuous input current waveform is proposed to overcome these drawbacks. In addition, voltage stresses of main switches are relieved by applying a two-series connected structure. This two-series structure will enhance the reliability of FET switches which is crucial for high-voltage satellite applications. Therefore, the proposed DC/DC converter topology would be more suitable for high-voltage satellite applications with stringent requirements of reliability, EMC, and high-power density. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | DC/DC converter▼asatellite▼ahigh power density▼aactive-clamp forward structure▼acontinuous input current | - |
dc.subject | 직류/직류 전원단▼a인공위성▼a고밀도▼a액티브 클램프 포워드▼a연속적인 입력 전류 파형 | - |
dc.title | Research on DC/DC converter topology for high-input-voltage satellite system applications | - |
dc.title.alternative | 고전압 위성시스템 적용을 위한 직류변환장치 기술 연구 | - |
dc.type | Thesis(Ph.D) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :전기및전자공학부, | - |
dc.contributor.alternativeauthor | 이나영 | - |
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