The Effect Of Repetition Rate On Electrode Material Performance In High Current Switches

A. L. Donaldson; M. Kristiansen

doi:10.1117/12.943675

6 April 1988 The Effect Of Repetition Rate On Electrode Material Performance In High Current Switches

A. L. Donaldson, M. Kristiansen

Proceedings Volume 0871, Space Structures, Power, and Power Conditioning; (1988) https://doi.org/10.1117/12.943675
Event: 1988 Los Angeles Symposium: O-E/LASE '88, 1988, Los Angeles, CA, United States

Abstract

Many applications of high current switches require operation in the burst mode or at high repetition rates. Under these conditions, it has been observed that electrode erosion rates increase signifi-cantly. An analytical solution to the heat conduction equation is discussed which determines the onset of the bulk surface erosion mode as a function of peak current, pulse width, rep-rate and material properties. The solution indicates that materials with lower thermal diffusivities can operate at higher rep-rates before gross melting of the electrode surface occurs. The overall effect of increasing rep-rate is to shift the point of transition on the standard electrode erosion graph to lower values of peak current or charge transfer.

Citation Download Citation

A. L. Donaldson and M. Kristiansen "The Effect Of Repetition Rate On Electrode Material Performance In High Current Switches", Proc. SPIE 0871, Space Structures, Power, and Power Conditioning, (6 April 1988); https://doi.org/10.1117/12.943675

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