Optimization Of High-frequency Switching Power Supply Transformer Design And Application

With the development of electronic and IT technologies, the power supply systerm of all kinds of electronic equipments are required to be smaller and lighter and more reliable. The key to that goal is the technique of high frequency switching power supply. The transformer is the main part of the high frequency switching power supply and its optimization design is quite pivotal to the goal above.Based on the relevant theoretical researches, the loss property of the magnetic core material and winding were analyzed in this thesis . And 500 KHz high frequency switching mode power supply transformer was made of PC40 magnetic core material for the first time in this thesis, which has good application perspective and can lead to enormous economic profits. First in this thesis, calculation methods and work states of five high frequency switching mode power supply transformers in circuit form had been studied systematically. Then the optimum square-approach-method was used to fix the Pcv-f-Bm curve of the PC40 magnetic core material. The values of m1, m2 and m3 in the high frequency formula Pcv=m1*ΔBm2*fm3 can be gotten and the experience values of these parameters during the traditional design was modified. Secondly, the model of the high frequency switching mode power supply transformer with the lest loss and highest efficiency was set up. With the genetic algorithm and Microsoft Visual FoxPro 6.0, the optimization designing software of high frequency switching mode power supply transformer—HFSMPST Expert V1.0 was developed. Then the sample of the high frequency switching mode power supply transformer was produced. The manufacturing techniques and flows were also introduced in this thesis. In the end, the lab experiments validatedcorrectness of the design and the scheduled research aim had been realized.