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Critical Conduction Mode BOOST Type Solar Array Regulator  

Yang, JeongHwan (한국항공우주연구원)
Ryu, SangBurm (한국항공우주연구원)
Yun, SeokTeak (한국항공우주연구원)
Publication Information
Journal of Satellite, Information and Communications / v.9, no.3, 2014 , pp. 86-90 More about this Journal
Abstract
A DC-DC Converter operates in CCM(Continuous Coundcution Mode), DCM(Discontinuous Conduction Mode), CRM(Critical Conduction Mode). The CRM is boundary between CCM and DCM. If a DC-DC converter is designed to operate in CRM, its inductor volume can decrease and power loss which caused by switch and diode can decrease. In this paper, the DC-DC converter which operates in CRM is applied to a solar array regulator(SAR) for the satellite. The switching frequency of the CRM boost SAR changes according to input and output condition. The switching frequency limit logic is applied to limit the maximum switching frequency. Meanwhile, the small signal transfer function of the CRM boost SAR is simple, so the controller design is also simple. In this paper, the small signal transfer function from control reference to solar array voltage is induced. And the voltage controller is designed based on the small signal transfer function. Finally, the CRM boost SAR is verified by simulation.
Keywords
DC-DC power converters; solar array regulator; CRM; Boost converter; EPS; Satellite Power;
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  • Reference
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