Research On Field-Circuit Coupling Simulation And Experimental In High Frequency Power Supply

In order to give the user a good experience,product design engineers will model the optimization from the volume at the same time,in order to achieve efficient use of energy sufficient,engineers are also seeking more energy-saving design.In the presence of magnetic components in the product,the product volume is mainly affected by the size of magnetic components in the design of the size limit,the optimization design of the products,the need to proceed from the volume optimization of magnetic devices.In this paper the flyback high frequency power supply as the object,using the method the field circuit coupling to solve three main problems of high frequency transformer,(1)Based on the finite element analysis of different signals of the magnetic saturation of the magnetic core,loss and temperature rise;(2)Optimization of winding copper loss in high frequency environment;(3)The power circuit is designed based on field circuit coupling.Firstly,structure design of high frequency transformer core selection and number of windings based on core window area method;simulation of magnetic saturation of the transformer structure by means of finite element method and simulation,to evaluate the structure of the traditional magnetic field;in the simulation,by evaluating the ideal working environment of different cores the model of iron loss,temperature rise,high frequency characteristics and the effects of magnetic core;using Simplorer model into the ideal transformer flyback open loop circuit,working mode and magnetic circuit simulation model;through the existing laboratory equipment,the magnetic saturation And associated core parameter experiments.With the increase of frequency,impact can not ignore the skin effect and proximity effect for winding copper loss,the influence of winding AC loss,from the point of further study,through a combination of simulation and finite element analysis showed that when the frequency and the external circuit is certain,there is the minimum conclusion changes of winding copper loss and selected wire diameter;when the total cross-sectional area of the windings to ensure constant,the research adopts multi strand and winding method to reduce AC losses,so that the total cross-sectional area is constant,winding and winding quantity at different frequencies under different performance,in a certain range and the winding quantity can reduce the AC loss.When the working frequency of large winding.In the range of frequencies,and around and around the structure rather than the structure can reduce the AC loss;for flyback transformers of 100 W core,optimization model,finite element analysis of winding structure,and compares the loss before and after optimization winding.Finally,the coupled field circuit to build a 100 W power supply circuit based on the verified research method in the simulation platform.