| Title |
A Study on the Affected of DC-Link Voltage Balance Control of the Vienna Rectifier Linked With the Input Series Output Parallel LLC Converter |
| Authors |
Seung-Woo Baek ; Hag-Wone Kim ; Kwan-Yuhl Cho |
| DOI |
10.6113/TKPE.2021.26.3.205 |
| Keywords |
LLC converter; ISOP (Input Series Output Parallel); Unbalance control; Three-level rectifier; Resonant converter |
| Abstract |
Due to the advantage of reducing the voltage applied to the switch semiconductor, the input series and output parallel combination is widely used in systems with high input voltage and large output current. On the other hand, the LLC converter is widely used as a high-efficiency power converter, and when connected by ISOP combination, there is a possibility that input voltage imbalance may occur due to a mismatch of passive devices. To avoid damaging the switching device, this study analyzed the DC-link voltage imbalance of a high-capacity supply using an ISOP LLC converter. In addition, the case where DC-link unbalance control was applied and the case not applied was analyzed respectively. Based on this analysis, an initial start-up algorithm was proposed to prevent input power semiconductor device damage due to DC-link over-voltage. The effectiveness of the proposed algorithm has been verified through simulations and experiments. |