Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title A New Pulse Frequency Modulation(PFM) Series Boost Capacitor(SBC) Full Bridge DC/DC Converter
Authors Yong-Saeng Shin ; Young-Su Jang ; Chung-Wook Roh ; Sung-Soo Hong ; Hyo-Bum Lee ; Sang-Kyoo Han
Page pp.120-127
ISSN 1229-2214
Keywords Pulse Frequency Modulation; PFM; Series Boost Capacitor; SBC; Full Bridge Converter; Server Power Supply
Abstract The regulated peak power tracking (RPPT) systems such as the series structure and the parallel structure are commonly used in the satellite space power system. However, this structure processes the solar array power to the load through two regulators during one orbit cycle, which reduces the energy transfer efficiency. The series-parallel structure for the RPPT system can improve the power conversion efficiency, but an additional regulator increases the cost, size and weight of the system. In this paper, a simplified series-parallel space power system that consists of two regulators is proposed. The proposed system has the similar energy transfer efficiency with the series-parallel structure by adding one switch to the series structure, which reduces the cost, size and the weight. The large signal stability analyses is provided to understand the four main modes of system operation. In order to compare the energy efficiency with a series structure, the simulation is performed. The experimental verifications are performed using a prototype hardware with TMS320F2812 DSP and 200W solar arrays.