大功率多绕组中频变压器的优化设计研究  

Research on Optimization Design for High-power-multi-winding Mid-frequency Transformer

作　　者：王佳宁 邹强 庄加才 徐君[2] WANG Jia-ning;ZOU Qiang;ZHUANG Jia-cai;XU Jun(Hefei University of Technology,Nationaland Local Joint Engineering Laboralory for Renewable Energy Access to Grid Technology,Hefei 230009,China;不详)

机构地区：[1]合肥工业大学,可再生能源接入电网国家地方联合工程实验室,安徽合肥230009 [2]阳光电源股份有限公司,安徽合肥230088

出　　处：《电力电子技术》2021年第8期31-35,共5页Power Electronics

基　　金：国家自然科学基金(52077051)。

摘　　要：应用于大功率中压并网系统的电力电子变压器中最关键的元件,即中频变压器(MFT)在系统中起着电气隔离和电压转换等关键作用。介绍了一种采用特殊的磁芯结构和绕组结构的多绕组MFT,并提出了一种MFT优化设计方法。该方法使用面积乘积(AP)法设计MFT的磁芯体积,然后针对具体的变压器结构进行损耗建模分析,通过变量优化使得损耗达到最优。整个优化设计过程相对简单,同时也保证了一定的精确度。最后制作了一台200 kW/30 kHz的MFT样机,并在LLC谐振变换器中进行了实验,其结果验证了优化设计方法的准确性。The most critical component in power electronic transformers used in high-power medium-voltage grid-connected systems,mid-frequency transformer(MFT)plays a key role in electrical isolation and voltage conversion in the system.A multi-winding MFT with a special magnetic core structure and winding structure is introduced,and proposes an MFT optimization design method is proposed.This method uses the area product(AP)method to design the magnetic core volume of the MFT,and then conducts loss modeling analysis for the specific transformer structure,and optimizes the loss through variable optimization.The entire optimization design process is relatively simple,while ensuring a certain degree of accuracy.Finally,a 200 kW/30 kHz MFT prototype is proposed,and experiments are conducted in LLC resonant converters.The experimental results verify the accuracy of the optimized design method.

关 键 词：中频变压器 面积乘积 损耗建模 

分 类 号：TM3[电气工程—电机]