空心脉冲发电机剩磁能量回收方法

Remanent magnetic energy recovery method for air-core pulse alternator

为了降低空心脉冲发电机的能量损耗与励磁绕组发热,提出了一种具有剩余磁能回收功能的脉冲发电机励磁电路。通过在电容支路设置调节电感,使放电完成后的电容电压反向,迫使晶闸管与二极管关断,以切换电流流通路径来实现剩余励磁能量到电容器中的转移。该电路使用晶闸管作为主开关,电流关断能力强的特点使其在大功率脉冲发电机的应用中具有一定优势。对提出的励磁能量回收电路的工作过程进行了介绍,仿真分析了剩余能量回收对励磁绕组能量损耗和脉冲发电机发热的影响,并对该电路拓扑的工作原理进行了实验验证。结果表明:该电路可以迅速回收励磁绕组中的剩余能量,缩短励磁电流续流时间,减少励磁损耗与能量损耗。仿真与实验结果反映的规律与电路原理一致,表明了该电路方法的可行性。

To reduce the energy loss of the air-core pulse alternator and the heating of the field winding,a field circuit topology with the function of recovering residual magnetic energy is proposed.By setting the adjustable inductance in the capacitor branch,the capacitor after the discharge has a reverse voltage,forcing the thyristor and the diode to turn off,and switching the current flow path to realize the transfer of the remaining excitation energy to the capacitor.The circuit uses the thyristor as the main switch,and its high current turn-off capability gives it an advantage in the application of high-power pulse alternator.The working process of the proposed excitation energy recovery circuit is introduced,the influence of residual energy recovery on the energy loss and heat generation of the field winding is simulated and analyzed,and the working principle of the circuit topology is verified experimentally.The results show that the circuit can quickly recover the residual energy in the field winding,shorten the freewheeling time of the excitation current,and reduce the excitation loss and energy loss.The law reflected by the simulation and experimental results is consistent with the circuit principle,which shows the validity of the circuit method.