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Inductive high voltage pulse generator based on resonance system
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity. (Elektricitetslära)
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity. (Elektricitetslära)ORCID iD: 0000-0003-2197-5352
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity. (Elektricitetslära)
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity. (Elektricitetslära)
2007 (English)In: Journal of Electrical Engineering, ISSN 1335-3632, Vol. 58, no 1, 19-25 p.Article in journal (Refereed) Published
Abstract [en]

A high voltage pulse generator based on inductive intermediate energy storage has been constructed. The current switching technique used in the generator is based on a resonance system. Opening switches for high currents are generally difficult to construct and the switch used here has proven to turn off 1.8 kA DC-current at a rate of 300 A/μs. The generator is equipped with a step-up transmission line transformer as intermediate magnetic energy storage and the primary and secondary energy storages are capacitive. An LC-resonance circuit is combined with 3 vacuum interrupters in series as an opening switch on the primary side of the transformer. Discharging the capacitor bank into the primary winding of the transformer introduces a 200 Hz sinusoidal oscillation on the primary current. The movable contacts in the vacuum interrupters are operated mechanically and stable arcs are formed as the gaps are opened. As the 200 Hz sinusoidal current reaches its first maximum, the small LC-resonance circuit is triggered and the current achieves a new frequency of 25 kHz. The large amplitude and high frequency generated by the LC-resonance circuit results in a zero crossing of the primary current. As the current crosses zero the arc deionises and the current is switched off. Pulse shaping with a 2 x 50 m Blumlein configuration on the secondary side of the transformer has been investigated. A rise-time of 40 ns and pulse duration of 700 ns were measured for a resistive load. The aim with this pulse generator is to get familiar with the challenges involved in scaling the system to higher performance.

Place, publisher, year, edition, pages
2007. Vol. 58, no 1, 19-25 p.
Keyword [en]
high voltage, pulsed power, transformer, transmission line, vacuum interrupter, current switch
National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Science of Electricity
Identifiers
URN: urn:nbn:se:uu:diva-94204ISI: 000255291000003OAI: oai:DiVA.org:uu-94204DiVA: diva2:167975
Available from: 2006-04-06 Created: 2006-04-06 Last updated: 2016-04-22
In thesis
1. Inductive Pulse Generation
Open this publication in new window or tab >>Inductive Pulse Generation
2006 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Pulsed power generators are a key component in compact systems for generation of high-power microwaves (HPM). HPM generation by virtual cathode devices such as Vircators put high demands on the source. The rise time and the pulse length of the source voltage are two key issues in the generation of HPM radiation. This thesis describes the construction and tests of several inductive high power pulse generators. The pulse generators were designed with the intent to deliver a pulse with fast rise time and rectangular voltage. Therefore, the pulse generators are all based on discharges of transmission lines. The transmission lines used in the pulse generators are modern high voltage cables normally used in power transmission. All tested pulse generators have step up transformers as intermediate magnetic energy storage. Further, the pulse generators have contributed to the knowledge of compact designs. Closing switches is another important device in pulse generator architectures. In general, high power switching involving large currents and high voltages requires the use of robust switches. The switches used in the pulse generators of this thesis are of gas and liquid type.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2006. 93 p.
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 159
Keyword
Technology, Pulsed Power, Inductive Pulse Generator, High Voltage, Semicon, XLPE, TEKNIKVETENSKAP
National Category
Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-6699 (URN)91-554-6506-4 (ISBN)
Public defence
2006-04-28, Polhemsalen, Ångströmslaboratoriet, Uppsala, 13:15
Opponent
Supervisors
Available from: 2006-04-06 Created: 2006-04-06 Last updated: 2013-07-26Bibliographically approved

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Lindblom, AdamIsberg, JanBernhoff, HansLeijon, Mats

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