光伏逆变器中HALL电流传感器磁场仿真过程研究与应用

The Study ＆ Application of Magnetic Field Simulation Process of HALL Current Transducer in PV Inverter

首先介绍了零磁通HALL电流传感器的工作原理，根据光伏逆变器电量测量拓扑结构及传感器磁路特点，并在两个假设的基础上推出了传感器磁场有限元求解方程组。分析了FLUX软件的建模功能，网格编织特点，磁场仿真求解器原理和整个仿真求解流程。最后以LEM一款用于光伏IOOKW逆变器的HALL电流传感器为例进行全面的磁场仿真分析处理。这种磁场的仿真过程研究方法利于提高传感器设计效率和质量，对提高光伏系统的效率有较大意义。

Firstly, the working principle of zero-flux HALL current transducer is introduced, based on two assumptions, the finite element solved equations to current transducer magnetic field was deduced according to PV inverter topology and transducer magnetic circuit. Then, FLUX software modeling function, mesh feature, principal of magnetic solver and whole analysis process of magnetic simulation were studied. At last, one type HALL current transducer from LEM, as an example, was analyzed, which is used on 100KW PV inverter. The method to analyze the magnetic field benefits improving the quality and design efficiency of transducer, and it is significant to improve power efficiency of PV system.