Novel Design Method of Flyback Transformer and Its Snubber Circuit

Transformer is the core of flyback switching power supply device.The working principle of the flyback transformer was analyzed.The concrete method and the detailed procedures about the design of flyback transformer and its absorption circuit were introduced,which included the calculation of Zener clamping voltage,the calculation of actual duty ratio,the calculation of inductance,the select of magnetic core,the calculation of winding turns,and calculation of air-gap.Experimental results show that the designed transformer and its snubber circuit have excellent electrical performance in practical circuit.It can work stable with a wide range of input voltage.