Novel Control Strategy for Single-Phase Single-Stage Isolated AC/DC Converters
摘要
The single-phase single-stage isolated AC/DC converter is attracting a lot of attention in the field of electric vehicle energy storage because of its advantages of high efficiency, high power density, soft-switching characteristics and so on. Because the physical meaning of the existing dq current control scheme is not clear, it is difficult to design the dynamic performance of the current loop. In this paper, a novel control strategy for this converter is proposed. This control scheme is attached with a linear current loop, which is convenient to dynamic design. Besides, the soft-switching performance of the system and the robustness to load disturbance can also be improved due to the modulation signal compensation scheme. Finally, the the accuracy and effectiveness of the proposed control scheme are verified by the detailed simulation and experimental results.