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최재동(J.D.Choi),성세진(S.J.Seong) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(1)
Electrical power in satellite system should persistently satisfy specified power requirement even though that happen the failure of solar array string or battery cell during the mission operation<br/> In this study, the solar array and battery of GEO Communication Satellite with 3kW capacity are designed, and energy balance analysis according to power operation mode are performed to meet specified power capacity at the transfer orbit.
노이즈 성분을 고려한 SRM 센서리스 알고리즘의 강인성
김갑동(K. D. Kim),최재동(J. D. Choi),김진영(J. Y. Kim),안재황(J. H. Ahn),성세진(S. J. Seong) 전력전자학회 2000 전력전자학술대회 논문집 Vol.2000 No.11
The sensorless scheme for Switched Reluctance Motor(SRM) dives must have the robustness and reliability because the noise and error are sensitive. These elements make electrically noisy environments due to the proximity of high current power circuits with small signal electronic circuits when SRM drives. Also, the leakage inductances and finite coupling capacitances, these can cause the noise on any low voltage current and voltage measurement The error can occur because the current and voltage including the noise are used as the inputs of sensorless algorithm.<br/> In this paper the high robustness and resistance of input noise are described and the fuzzy logic based rotor estimation algonthm is used to reduce the tolerance of input data.
300kHz ZVS Full Bridge PWM 컨버터에 관한 연구
주형준(H.J Joo),김의찬(E.C Kim),최재동(J.D Choi),손승찬(S.C Son),성세진(S J Seong) 전력전자학회 1997 전력전자학술대회 논문집 Vol.1997 No.-
This Paper is concerned on developing DC-DC converter using ZVS-FB-PWM Converter. The converter output is 28V and regulated by phase shift control methode. MOSFET is used by the main switching device and high frequency transfomer is made for operating at 300kHz swiching frequency When the load vary widely, converter's ZVS characteristic is expressed by experiment result
정규범(G.B.Joung),최재동(J.D.Choi),최성봉(S.B.Choi),이상석(S.S.Lee),신동희(D.H.Shin) 전력전자학회 1998 전력전자학술대회 논문집 Vol.- No.-
This paper has been analyzed, modeled, designed, fabricated, and tested for solar cell simulator which has solar array characteristics. The main purpose is the development of solar cell simulator to test electrical power subsystem for GEO Communication Spacecraft. The maximum power of the simulator is about 5㎾, which is consist of 12 independent simulator modules with 420 W power rating The 12 simulator modules are independently controlled like as real solar array system<br/> <br/>