Research on Control System of Three-Phase Isolated AC/DC Converter

The isolated AC/DC converter has many advantages such as the ability to convert electricity according to needs, high efficiency, small size, high power density, and the ability to act as a load or power source on demand. The corresponding modulation strategy and control strategy of the topology are analyzed in this paper. Due to the impact of the peak inductance current in its topology on system performance, this paper proposes a control strategy for minimizing the peak value of inductance current to improve system reliability and reduce on-state losses. The optimal algorithm is used to simultaneously change the modulation coefficient and external phase angle to achieve the minimum peak value of inductance current, and the experimental results verify proposed method.