基于能量回收原理脉冲变压器复位系统仿真与实验研究北大核心CSCD

为提升脉冲功率系统中脉冲变压器的磁芯利用率,提出了一种基于能量回收原理的脉冲变压器复位系统。根据磁芯磁滞回线分析了基于能量回收原理复位系统在一个周期内磁感应强度的变化过程,推导给出了脉冲变压器励磁电流、复位电容电压在不同阶段的求解公式。建立了基于能量回收原理脉冲变压器复位系统的仿真模型,通过仿真结果验证了复位系统理论分析和求解公式正确性。在此基础上构建了基于脉冲变压器升压及能量回收复位系统的脉冲调制器试验平台,在相同脉冲宽度下对比有复位系统和无复位系统脉冲调制器的励磁电流,结果表明,有复位系统脉冲调制器可有效提高磁芯的利用率。对有复位系统的脉冲调制器进行重频实验,结果表明复位系统可实现1 kHz重频稳定工作。

Simulation and experimental research of pulse transformer reset system based on energy recovery principle

To improve the core utilization rate of pulse transformer in pulse power system, a pulse transformer reset system based on energy recovery principle is proposed. Firstly, according to the magnetic core hysteresis loop, the change process of the magnetic induction intensity of the reset system based on the energy recovery principle in one cycle is analyzed, and the solution formulas of the pulse transformer excitation current and reset capacitor voltage in different stages are deduced. A simulation model of the pulse transformer reset system based on the energy recovery principle is established, and the correctness of the theoretical analysis and solution formulasof the reset system is verified by the simulation results. On this basis, a pulse modulator test platform based on pulse transformer boosting and energy recovery reset system is constructed. The excitation currents of the pulse modulators with reset system and without reset system are compared under the same pulse width. The results show that the reset system pulse modulation can effectively improve the utilization of the magnetic core. The repetition frequency experiment is carried out on the pulse modulator with reset system, and the results show that the reset system can realize the stable operation of 1 kHz repetition frequency.