多路初级绕组脉冲变压器固态调制器

Solid state modulator based on multi-primary winding pulse transformer

介绍了一种输出峰值功率在MW量级,工作频率和脉冲宽度均连续可调的高功率固态脉冲调制器的设计。脉冲调制器的放电回路采用先进的固态开关技术,以实现频率和脉宽的连续可调。调制器输出采用升压型多路初级绕组脉冲变压器,以降低励磁单元的工作电压和工作电流,同时避免了由于固态开关串并联而导致的电路复杂设计问题。系统采用在励磁回路中添加补偿网络的方法提高输出脉冲的平顶度。采取以上这些技术设计的固态调制器工程样机输出脉冲峰值电压为48 kV、宽度1.0-4.5μs、重复频率20-300 Hz、脉冲顶降小于1%,可以作为磁控管调制器应用在粒子加速器系统中。

A solid state modulator with peak output power up to several MW is introduced in this paper.This kind modulator is characterized by repetitive frequency and easily-adjustable width of the output pulse for utilization in solid state switch.Storage capacitors of the modulator are charged by HF-inverter charging power supply in constant current mode.A step-up multi-primary winding transformer is applied to decreasing each exciting unit＇s operation voltage and current,which could avoid circuit complexities caused by solid state devices connecting in series or parallel.RL pulse compensating network is introduced to counteract top-droop caused by pulse transformer or low capacitance of storage capacitors.With above methods,A magnetron modulator with a peak output voltage of 48 kV,a pulse width of 1.0~4.5 μs,a repetitive frequency of 20~300 Hz,a top-droop of less than 1% has been designed,and it could be used as the particle accelerator＇s RF power source.