A modified circuit topology for inductive pulsed power supply based on HTSPPTs. (October 2016)

• Record Type: Journal Article
• Authors: Li, Haitao; Zhang, Cunshan; Wang, Teng; Gao, Mingliang; Li, Zhenmei; Zou, Guofeng
• Is Part Of: Cryogenics. Volume 79(2016)
• Page Start: 38
• Page End: 44
• Publication Date: 2016-10
• Subjects: Pulsed power supply -- Inductive energy storage -- HTS pulsed power transformers -- Current pulse; Low temperature engineering -- Periodicals; Low temperature research -- Periodicals; 536.56
• DOI: 10.1016/j.cryogenics.2016.07.013
• Languages: English
• ISSNs: 0011-2275

Abstract

Highlights: When L1 is charged quickly, the interference of C1 to L1 can be eliminated. The output current pulse can be adjusted. When the load is opened, most of the residual energy can be recovered. Abstract: High temperature superconducting pulsed power transformer (HTSPPT) provides an efficient method for inductive energy storage and current multiplication. The primary inductor of HTSPPT used for energy storage is made of high temperature superconducting coils, and the secondary inductor used for current pulse generation is made of normal conductor coils. In the initial circuit, the secondary inductor generates current pulse by switching out the coupled primary superconducting inductor. However, during the switching period, the leakage flux caused by imperfect coupling and the sudden change in primary current induce a voltage across the opening switch which exceeds the affordability of modern solid-state switches. In previous studies, a half-cycle oscillatory discharge circuit is proposed to mitigate these problems by using a capacitor to recapture the energy in the leakage flux and to slow down the turnoff of current in the primary. However, there are still some problems should be settled. For example, the output pulse cannot be adjusted, the residual energy cannot be recovered and the capacitor branch circuit may have an impact on the charging process. In the paper, a modified discharge circuit topology is introduced to solve these problems. A multi-module system comprising of several HTSPPTs charging in series connection and discharging in parallel is also designed and simulated. This system can be used to power an electromagnetic emission device.