부산대학교 도서관

The evolution of vehicle-to-grid technology introduces new challenges for high-performance ac–dc converters. This article proposes a zero-vector-reconfiguration based space vector pulse width modulation (SVPWM) technique for high-frequency link three-phase (HFLTP) ac–dc converter, which utilizes zero-vector reconfiguration to enable soft-switching and soft commutation in both rectifier and inverter modes. The proposed HFLTP ac–dc converter consists of a matrix converter (MC) and a full bridge converter (FBC), interconnected via a high-frequency transformer (HFT) to form a single-stage power converter with high power density and compact dimensions. The proposed modulation technique, which is based on SVPWM, reconfigures zero vectors to enable zero-voltage-switching for the FBC and zero-current-switching for the MC. Simultaneously, it suppresses voltage spikes of power devices and HFT without adding any auxiliary circuits. Notably, the proposed modulation strategy eliminates the necessity for current polarity detection, allowing for the application of the same switching sequence in both rectifier and inverter modes. To validate the efficacy and performance of the proposed modulation technique, a 160 Vdc–110 Vac, 1.2 kW prototype has been developed.