大功率非晶合金电子变压器的优化设计

Optimal design of high-power amorphous alloy electronic transformer

大功率电子变压器是开关电源(SMPS)的核心部件,占据开关电源绝大部分的体积和重量,因此其设计的优劣将直接关系到开关电源的使用寿命和性能。针对大功率电子变压器损耗大的问题,对非晶合金电子变压器的优化设计方法进行了研究。分析了电子变压器的磁芯损耗和绕组损耗。研究了以变压器的效率为主要的优化目标,磁芯的工作磁感应强度和导体电流密度为变量的优化方法。用MATLAB编写了计算程序,计算了电子变压器的主要参数。通过分析计算结果,得到了在不同的工作磁感应强度和电流密度下,变压器损耗和效率的关系。考虑最优效率原则,给出了具体的变压器设计参数,并对温度场和电场用ANSYS进行了仿真分析,验证了设计的合理性和可行性。

The high-power electronic transformer is the most essential part for switched mode power supply （SMPS） since it determines about 25% of the overall volume and more than 30% of the overall weight. It is well known that the loss of transformer of high-power electronic transformer is considerably large. Thus a new material amorphous alloy is applied in this design for reducing loss. The core loss and winding loss are analyzed. Based on optimal efficiency, a procedure for optimum design of high-power electronic transformer is presented. The operating magnetic flux density and current density are treated as variables in calculating main parameters of transformer by MATLAB program. It pro- vides optimal parameters of electronic transformer for efficiency maximization. The temperature field and electric field are simulated by ANSYS. The results of simulation prove that this design of the electronic transformer is reasonable.