Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title A Study on Bipolar DC-DC Converter for Low Voltage Direct Current Distribution
Authors Jung-Yong Lee ; Ho-Sung Kim ; Jin-Tae Cho ; Ju-Yong Kim ; Younghoon Cho
DOI 10.6113/TKPE/2019.24.4.229
Page pp.229-236
ISSN 1229-2214
Keywords Bipolar DC-DC converter; LVDC(Low Voltage Direct Current); SST(Solid State Transformer); Voltage balancer
Abstract This study proposes a DC-DC converter topology of solid-state transformer for low-voltage DC distribution. The proposed topology consists of a voltage balancer and bipolar DC-DC converter. The voltage and current equations are obtained on the basis of switching states to design the controller. The open-loop gain of the controller is achieved using the derived voltage and current equations. The controller gain is selected through the frequency analysis of the loop gain. The inductance and capacitance are calculated considering the voltage and current ripples. The prototype is fabricated in accordance with the designed system parameters. The proposed topology and designed controller are verified through simulation and experiment.