| Title |
High-Efficiency Dual-Buck Inverter Using Coupled Inductor |
| Authors |
Min-Kwon Yang ; Yu-Jin Kim ; Woo-Young Choi |
| DOI |
10.6113/TKPE.2019.24.6.396 |
| Keywords |
Single-phase; Dual-buck inverter; Reverse-recovery problem; Power efficiency |
| Abstract |
Single-phase full-bridge inverters have shoot-through problems. Dead time is an essential way of solving these issues, but it distorts the output voltage and current. Dual-buck inverters are designed to eliminate the abovementioned problems. However, these inverters result in switching power loss and electromagnetic interference due to the diode reverse-recovery problem. Previous studies have suggested reducing the switching power loss from diode reverse-recovery, but their proposed methods have complex circuit configurations and high system costs. To alleviate the switching power loss from diode reverse-recovery, the current work proposes a dual-buck inverter with a coupled inductor. In the structure of the proposed inverter, the current flowing into the original diode is divided into a new diode. Therefore, the switching power loss is reduced, and the efficiency of the proposed inverter is improved. Simulation waveforms and experimental results for a 1.0 kW prototype inverter are discussed to verify the performance of the proposed inverter. |