Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title A New Voltage Balancer With Bidirectional DC?DC Converter Function for EV Charging Station
Authors Hyun-Taek Nam ; Sanghun Kim ; Honnyong Cha ; Heung-Geun Kim
Page pp.313-320
ISSN 1229-2214
Keywords Bidirectional DC-DC converter ; Bipolar DC bus ; SC(Series-Capacitor) DC-DC converter ; Voltage balancer ; VBC(Voltage Balancing Control)
Abstract This study proposes a new voltage balancer with bidirectional DC-DC converter function. The proposed balancer can serve as a voltage balancer and a bidirectional DC-DC converter. Thus, the balancer can be applied to battery management systems or fast chargers in electric vehicles (EVs) charging stations while balancing bipolar DC bus voltages. The proposed system has unlimited voltage balancing range unlike the conventional voltage balancing control using a three-level DC-DC converter. A comparison of the voltage balancing range between the proposed and conventional scheme is explored to confirm this superiority. Simulation and experimental results are provided to validate the effectiveness of the proposed system.