Xiong Chaowei, Chen Rong, Geng Jiuyuan, Cheng Xinbing, Yang Jianhua, Dai Qiyuan
College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, People's Republic of China.
Rev Sci Instrum. 2021 Oct 1;92(10):104712. doi: 10.1063/5.0065777.
One of the important research directions in pulse power technology is to increase power density and operational stability of compact high-power pulse transformers. In this paper, the research object is a high-power pulse transformer using combined insulation, and the operating characteristics are obtained using simulation and experiment methods. The experimental results show that the maximum output voltage of the transformer increases by 30% in the combined insulation. At the same time, the combined insulation transformers are safer and have better insulation holding capacity. Moreover, multiple breakdowns have less effect on the subsequent breakdown voltage of the combined insulation transformer. The average subsequent breakdown voltage after 30 breakdowns of combination insulated transformers is still higher than the first breakdown voltage of non-combined insulation transformers. In addition, the energy storage density of combined insulation transformers is ∼40% higher than that of non-combined insulation transformers because of the higher permittivity of Midel 7131 than transformer oil.
脉冲功率技术的重要研究方向之一是提高紧凑型大功率脉冲变压器的功率密度和运行稳定性。本文以采用复合绝缘的大功率脉冲变压器为研究对象，通过仿真和实验方法获得其运行特性。实验结果表明，采用复合绝缘时，变压器的最大输出电压提高了30%。同时，复合绝缘变压器更安全，具有更好的绝缘保持能力。此外，多次击穿对复合绝缘变压器后续击穿电压的影响较小。复合绝缘变压器30次击穿后的平均后续击穿电压仍高于非复合绝缘变压器的首次击穿电压。此外，由于Midel 7131的介电常数高于变压器油，复合绝缘变压器的储能密度比非复合绝缘变压器高约40%。
