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为了获得窄脉宽下的大脉冲电流,研究了基于反向导通双晶复合管开关的2种不同预充拓扑的高压脉冲电路—直接预充拓扑和变压器预充拓扑。首先建立了RSD的工作拓扑模型,并分析了RSD正常开通所需要的条件:足够的预充电荷量QR和匹配的磁开关延时时间ts;然后按照开通的要求对电容、电感、负载等回路参数进行设计并选择合适的开关;最后,通过Saber仿真和实验验证了设计的合理性,并对结果进行了对比分析。根据实验结果,在主电压10kV下,两种拓扑电路分别成功通过了14μs脉宽下9.0kA的主电流和15μs脉宽下7.5kA的主电流,通过RSD开关的浪涌电流时间平方积分别为545A2·s、426A2·s。实验表明,直接式预充拓扑电路设计和维护相对容易,其主要应用在单次的人工控制环境;变压器预充拓扑电路能实现高低压隔离,其主要应用在重频自动控制环境。
In order to obtain a large pulse current with a narrow pulse width, two kinds of high voltage pulse circuits with different preconditioned topologies based on reverse-conducting dual-crystal composite tube switches are studied, which are directly preconditioned topologies and transformer preconditioned topologies. Firstly, the working topology model of RSD is established, and the conditions required for the normal opening of RSD are analyzed: enough precharge charge QR and matching magnetic switch delay time ts; and then the circuit of capacitor, inductor, load and so on Parameter design and select the appropriate switch; Finally, the Saber simulation and experimental verification of the rationality of the design, and the results were compared. According to the experimental results, under the main voltage of 10kV, the two topologies successfully passed the main current of 9.0kA at 14μs pulse duration and 7.5kA at 15μs of pulse duration, respectively, and the square root of the inrush current through RSD switch was 545A2 · s, 426A2 · s. Experiments show that the direct preconditioning topology is easy to design and maintain, which is mainly used in a single artificial control environment. The preconditioned topological topology of the transformer can achieve high and low voltage isolation, which is mainly used in the repetitive frequency automatic control environment.