Switching power supply circuit based on parallelly connected technique of flow equalizing

The utility model provides a switching power supply circuit based on parallelly connected technique of flow equalizing. It includes three - phase rectifier and filter circuit and a plurality of parallelly connected constant voltage power supply, three - phase rectifier and filter circuit includes and three -phase full -bridge rectifier circuit and capacitor filter circuit is connected with the mud turbogenerator, constant voltage power supply swashs formula transformer, high frequency rectification filter circuit, sampling feedback circuit, PWM control circuit and the circuit that flow equalizes including turning over. The utility model provides a switching power supply circuit based on parallelly connected technique of flow equalizing's effect: in can being applied to the power supply system of adoption ecu's intelligent drilling tool, according to the load demand, provide the galvanic current ability, it is lower to have solved monolithic switching power supply circuit output, is difficult to satisfy the not enough of high power load demand to and the unbalanced problem of polylith switching power supply circuit parallel operation load, strengthened the ability that intelligent drilling tool carried the load, stability and life when having improved the operation.