有源复位电路的理论分析与实验研究

Theoretical analysis and experimental study of active reset circuit

分析了有源复位电路的工作原理,基于LC谐振原理推导出每个工作阶段励磁电流、复位电容/电压。在MATLAB的Simulink模块中搭建了有源复位电路的仿真模型,通过仿真结果与理论分析的对比,证实了复位电路设计的可行性。最后,为了验证理论,设计了一个80V/1.6A,变压器变比为1∶2的脉冲放电电路,分别测试了带/不带有源复位电路条件下磁芯的饱和时间,并计算出了磁芯的励磁电流。实验结果表明,采用有源复位电路,能够提高脉冲条件下磁芯的饱和时间,即实现磁芯的复位效果。

This paper presents the operation of the active reset circuit based on theoretical analysis,derived the magnetizing inductance and voltage of reset capacitor based on the principle of LC resonance.Build a simulation model of the active reset circuit in the Simulink module of MATLAB,by comparing the simulation results with the theoretical analysis,confirmed the feasibility of the active reset circuit design.Finally,to verify the theory,design a 80 V/1.6 A and 1 to 2 transformer ratio pulse discharge circuit,test the saturation time of core in the condition with/without the active reset circuit,and calculate the magnetizing inductance of the core.The experimental results shows that the saturation time of magnetic core increased under pulse condition by using the active reset circuit,that is the magnetic core can be reseted.