The role of rectifier transformers is to provide AC power to the rectifier, which then converts AC power into DC power, thus providing DC power supply. It can supply the appropriate voltage to the rectifier system and reduce the pollution to the grid caused by the waveform distortion caused by the rectifier system. The products have obvious power saving effect, low loss, low noise, strong shock and short circuit resistance, strong overload capacity, stable performance, reliable power supply, compact structure, small size and other outstanding advantages.