应用于功率变换器的多绕组高频变压器模型  

Dual Multi-Winding High-Frequency Transformer Equivalent Circuit for Power Converter Applications

作　　者：王迎迎 程红[1] Wang Yingying;Cheng Hong(School of Mechanical Electronic and Information EngineeringChina University of Mining and Technology,Beijing 100083 China)

机构地区：[1]中国矿业大学(北京)机电与信息工程学院,北京100083

出　　处：《电工技术学报》2021年第19期4140-4147,共8页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(51577187)。

摘　　要：实施功率变换器的电路仿真时需要较精确的多绕组高频变压器等效电路模型。传统的多绕组变压器星形模型不仅存在负漏感导致的振荡问题,而且其在仿真暂态问题时存在精度较差的问题。基于对偶原理的多绕组变压器模型在仿真暂态时可以更准确,但其拓扑复杂,很难根据端口测量信息确定模型参数。该文利用数值仿真的方法分析多绕组变压器的磁场分布,研究存在交替绕制的复杂绕组结构下多绕组高频变压器的对偶电路模型及其参数的确定方法。提出利用磁路中各磁阻的磁场能量和磁通确定非线性电感的方法,使复杂模型拓扑不受端口测量信息的限制。通过施加多幅值的激励电流来确定磁路中的非线性磁阻,然后通过转换得到非线性电感。最后,将等效电路模型与多边形模型和实验结果进行比较,验证了模型的准确性。An accurate multi-winding high-frequency transformer equivalent circuit model is required to implement the circuit simulation of the power converter.The traditional multi-winding transformer star model not only has the oscillating problem caused by negative leakage inductance,but also has poor accuracy in simulating transient problems.The multi-winding transformer model based on duality principle is more accurate in simulating transient problems,but its topology is complex.It is difficult to determine model parameters based on port measurements information.In this paper,the magnetic field distribution of multi-winding transformers is analysed numerically.The dual model of multi-winding high-frequency transformers with alternating winding structure and its parameters are determined.An inductance determination method is proposed by observing the magnetic energy and magnetic flux of each reluctance in the magnetic circuit,and it makes the complex model topology no longer be limited by the port measurements information.The nonlinear reluctance in the magnetic circuit is determined by applying various excitation currents,and then the nonlinear inductance is obtained by conversion.The equivalent circuit model is compared with the polygon model and experimental results to verify the accuracy of the proposed model.

关 键 词：等效电路 高频变压器 多绕组 非线性磁阻 

分 类 号：TM433[电气工程—电器]