Compact Marx Generator using Cockroft-Walton Voltage Multipier Circuit

Abstract

This paper reports a high voltage impulse generators. Generation of variable outputs impulse generator can be designed by combination of Cockcroft Walton voltage multiplier and Marx generator which can produce different high voltages. It is a portable device for field. The Marx generator is the simplest and most widely used high voltage pulse generation device. In order that equipment designed to be used on high voltage lines, and others, be able to withstand surges caused in them during operation, it is necessary to test these equipment with voltages of the form likely to be met in service. The apparatus which produces the required voltages is the impulse generator. In high voltage engineering, an impulse voltage is normally a unidirectional voltage which rises quickly without appreciable oscillations, to a peak value and then falls less rapidly to zero. A full impulse wave is one which develops its complete waveshape without flashover or puncture, whereas a chopped wave is one in which flash-over occurs causing the voltage to fall extremely rapidly. The rapid fall may have a very severe effect on power system equipment. The lightning waveform, is a unidirectional impulse of nearly double exponential in shape. That is, it can be represented by the difference of two equal magnitude exponentially decaying waveforms. In generating such waveforms experimentally, small oscillations are tolerated.