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Articles 61 - 63 of 63
Full-Text Articles in Electrical and Electronics
A 250-Kv Two-Pulse Modulator For The Gas Flow Switch Test Facility, David Michael Barrett
A 250-Kv Two-Pulse Modulator For The Gas Flow Switch Test Facility, David Michael Barrett
Electrical & Computer Engineering Theses & Dissertations
High-pressure spark gap switches are often used in pulsed power systems because of their high power capabilities. Unfortunately, these switches cannot be operated at high repetition rates because of the time required for the switch to recover. However, the recovery rate of a spark gap may be improved by flowing a gas through the interelectrode region so as to remove the hot gases and debris.
A test facility has been designed and constructed at Old Dominion University to evaluate the performance of gas-flow spark gap switches operating over a wide range of voltages and flow parameters. The facility consists of …
A Plasma Focus Interrupting Switch, Gregory Francis Knapp
A Plasma Focus Interrupting Switch, Gregory Francis Knapp
Electrical & Computer Engineering Theses & Dissertations
The feasibility of using a dense plasma focus (DPF) as a current interrupting device has been investigated. Specifically, a 34-kJ, Mather-type DPF was modified to accept a third electrode so that a discharge could be created between this electrode and the center electrode of the DPF by a 10-kJ inductive energy storage circuit. It was anticipated that the accelerating mechanisms of the DPF pinch, which are known to cause a rapid reduction in the DPF current, would interrupt the 1-kA to 10-kA secondary discharge current thus forcing the secondary current through an external load and hence result in power amplification. …
Circuit Analysis Of A Gas Flow Switch, Teri Marie Owens
Circuit Analysis Of A Gas Flow Switch, Teri Marie Owens
Electrical & Computer Engineering Theses & Dissertations
The circuit analysis of a gas flow switch is presented. The objective of the analysis is to model the switching process during spark gap breakdown. This information is useful in understanding switch operation and identifying ways to improve switch performance.
A lumped circuit model is used to describe a gas flow switch during the switching process. Certain circuit element values are determined experimentally through static tests. Other component values, including a time-varying switch resistance and inductance, are estimated from current measurements. In particular, unknown constants in expressions for gap resistance and inductance are determined using an iterative parameter estimation technique. …