Novel 13.5 kV Multichip Thyristor with an Enhanced DI/DT for Various Pulsed Power Applications

Spahn, E.; Buderer, G.; Brommer, Volker; Sterzelmeier, K.; Welleman, A.

doi:10.1109/ppc.2005.300788

Cited by 11 publications

(1 citation statement)

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“…There are various energy storage ways for PPS, such as capacitor bank, homopolar generator-inductor, explosive magnetic flux compression [11]. The PPS investigated in this paper is based on the capacitor bank, which is mainly composed of high-power energy-storage capacitors (hereinafter referred to as energy-storage capacitors) [4], high-power semiconductor devices [12][13][14][15][16][17][18][19][20], and high-power pulse-shaping inductors (hereinafter referred to as pulse-shaping inductors). High-power semiconductor devices include high-power thyristors (hereinafter referred to as thyristors) [12][13][14][15][16][17] and high-power fast recovery diodes (hereinafter referred to as fast recovery diodes) [18][19][20], as shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Reverse Recovery Current of High-Power Thyristor in Pulsed Power Supply

Wei

2020

Electronics

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The instantaneous overvoltages from the load side can cause damages of high-power thyristors in conventional pulsed power supply topologies, especially in cases of numerous pulse-forming units that operate together with discharge time intervals. The instantaneous overvoltages from the load side, which leads to high reverse recovery currents in high-power thyristors, can be induced by load mutations in the electromagnetic launching field. This paper establishes circuit models of PPS topologies, and investigates effects of the initial voltage of the energy-storage capacitor, the discharge time intervals, and the load resistance on the reverse recovery currents in high-power thyristors. To overcome the shortcomings of conventional PPS topologies, an improved PPS topology is developed. The improved PPS topology applies coupling inductor and resistance-capacitance snubber techniques, which can absorb the surge energy from the load side and reduce the reverse recovery currents in high-power thyristors. The simulation technique has been applied to validate theoretical analysis and the proposed model.

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Section: Introductionmentioning

confidence: 99%

Investigation of Reverse Recovery Current of High-Power Thyristor in Pulsed Power Supply

Wei

2020

Electronics

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A 16 MJ compact pulsed power system for electromagnetic launch

Dai

Zhang

Zhong

et al. 2015

Review of Scientific Instruments

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This paper has established a compact pulsed power system (PPS) of 16 MJ for electromagnetic rail gun. The PPS consists of pulsed forming network (PFN), chargers, monitoring system, and current junction. The PFN is composed of 156 pulse forming units (PFUs). Every PFU can be triggered simultaneously or sequentially in order to obtain different total current waveforms. The whole device except general control table is divided into two frameworks with size of 7.5 m × 2.2 m × 2.3 m. It is important to estimate the discharge current of PFU accurately for the design of the whole electromagnetic launch system. In this paper, the on-state characteristics of pulse thyristor have been researched to improve the estimation accuracy. The on-state characteristics of pulse thyristor are expressed as a logarithmic function based on experimental data. The circuit current waveform of the single PFU agrees with the simulating one. On the other hand, the coaxial discharge cable is a quick wear part in PFU because the discharge current will be up to dozens of kA even hundreds of kA. In this article, the electromagnetic field existing in the coaxial cable is calculated by finite element method. On basis of the calculation results, the structure of cable is optimized in order to improve the limit current value of the cable. At the end of the paper, the experiment current wave of the PPS with the load of rail gun is provided.

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