Digital 25Hz power

The utility model provides a digital 25Hz power, include: STC15 monolithic machine chip, driver chip group, the tripolar nest of tubes and load terminal mouth group. STC15 monolithic machine chip output SPWM program control driver chip group, driver chip group is used for drive circuit, and the tripolar nest of tubes is controlled by STC15 monolithic machine chip, and through the opening of triode, the closed form becomes pulse current, load terminal mouth group is used for the power to load output 25Hz, finally forms two way 25Hz powers of looks phasic difference 90 degrees. Controlled by thesinglechip, it is little that quality of supply is influenced by external factors, when constituteing the signal power system, when input power switching over or the switching of activestandby machine, do not influence continuity of supply, it is small, light in weight, frequency stabilization, the energy consumption is little to the control is convenient, can satisfy railway signal electrical power generating system's o