Three-phase AC / DC converter, photochemical reaction apparatus and method using the same, and lactam production method

摘要

A device provided between a three-phase AC power source and a light emitting diode group, wherein a pair of switching elements are connected in parallel between three-phase DC buses of the three-phase AC power source, and a switching element A reactor for connecting the connecting portion between them and the corresponding phase of the three-phase AC power supply, a smoothing capacitor on the output side of the three-phase full-bridge circuit, DC voltage detecting means, power supply voltage phase detecting means, and each switching element A pulse width modulation means for outputting a pulse width modulation signal, wherein the pulse width modulation means outputs a pulse width modulation signal based on the power supply voltage phase and the output voltage between the DC buses. Apparatus, photochemical reaction apparatus and method using the same, and lactam production method using the photochemical reaction method A large-capacity light-emitting diode group can be lit continuously and stably while suppressing the occurrence of a voltage drop phenomenon and suppressing the influence on the AC power supply side, which can contribute to stabilization of the photochemical reaction.