LC串联谐振和LCC串并联谐振在高压脉冲电容充电电源中的应用比较

Comparison of LC Series Resonant and LCC Series-parallel Resonant in High-voltage Pulse Capacitor Charging Power Supply Application

为得到更适合高压脉冲电容充电电源的电路拓扑,对LC串联谐振和LCC串并联谐振充电电源的应用电路特性进行了比较。利用Matlab分别对LC串联谐振和LCC串并联谐振脉冲电容充电电路进行了仿真分析,通过3kW电源样机对600μF/15kV负载电容进行了充电实验,给出了LCC串并联谐振实验波形,与仿真结果一致。实验结果说明实际LC串联谐振电路由于分布电容的影响变为LCC串并联谐振,并根据附加并联电容对电路分布电容的大小进行了间接测量,LCC串并联谐振所需供电电源功率较小、电流峰值较低、充电精度较高,因而更具优越性。

In order to obtain more suitable circuit topologies for high-voltage pulse capacitor charging power supply, the application circuit characteristics of LC series resonant and LCC series--parallel resonant charging power supply are compared and analyzed. Simulation and comparison of LC series resonant and LCC series-- parallel resonant capacitor charging power supply were performed using Matlab. A 3 kW power supply prototype is used to perform charging experiments with 600 μF/15 kV capacitor load, and the experimental waveforms of LCC series-parallel resonant are consistent with the simulation results. Experimental results show that the actual series resonant circuit is series-parallel resonant because of the distributed capacitance. Additional parallel capacitors are used for indirect measurement of distributed capacitance, and it shows that LCC series--parallel is demonstrated more superior for its smaller power supply requirement, lower peak current and higher charge accuracy.