Optimized Design for the 12-Pulse Uncontrolled Rectifier With a Coupling Interphase Reactor

Abstract

Owing to simplicity, lower total harmonic distortion, and higher power factor benefits, the 12-pulse uncontrolled rectifiers with a coupling interphase reactor are widely used as the power factor correction (PFC) converters, which are inserted between the power grid and the non-linear loads. However, the key parameters of the 12-pulse rectifier, such as transformer ratio, coupling coefficient and self-inductance of interphase reactor, and the capacitance of filter capacitor, are generally designed by trial and error, which is complicated and inefficient. In order to offer a useful reference for engineers to design the 12-pulse rectifier, a simply design program is proposed considering current ripple and output voltage ripple. Subsequently, optimized parameters of the 12-pulse rectifier are obtained after running the design program. Therefore, the rectifier can work in high performance with smaller size. Finally, the correctness of the theoretical analysis and the effectiveness of the proposed design program are validated by simulation results.