刚管调制器预调器电路的改进设计

An Improved Design of Driver in Hard Tube Modulator

到目前为止,在最大脉冲电流为400A的TM-906及最大脉冲电流为50A的TM-702F刚管调制器中,还沿用由真空电子管加脉冲变压器组成的预调器电路来实现脉冲编码或对在几种不同脉宽情况下工作的脉冲进行脉宽瞬时转换,提供所需要的高电压和大电流。本文介绍了用可控硅整流器(SCR)和功率晶体管组成的全固态编码预调器设计方案,叙述了双极型功率晶体管在预调器应用中的几个问题,讨论了这些问题的解决方法,给出了两种结构新颖和设计较为合理的实用电路,从而可大大缩小体积,减轻重量、降低成本和提高效率。

The driver circuit with vacuum-tubes and pulse transformers is still employed in thd TM-906 hard tube modulator with maximum pulse current of 400A and thd TM-702F of 50A. It is used to perform pulse coding or pulsewidth agility and to provide desired high voltage and large current. A solid state driver using silicon controlled rectifiers and power transistors is described, some problems concerned with application of bipolar power transistors to driver and their solutions are discussed. Two practical circuits of novel structure and reasonable design are presented. Their volume, weight and cost are greatly reduced, and efficiency is increased.